The Tor Browser: gfx/skia/trunk/src/gpu/gl/GrGpuGL.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGpuGL.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGpuGL.cpp

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrGpuGL.h"
 #include "GrGLStencilBuffer.h"
 #include "GrGLPath.h"
 #include "GrGLShaderBuilder.h"
 #include "GrTemplates.h"
 #include "GrTypes.h"
 #include "SkStrokeRec.h"
 #include "SkTemplates.h"
 #define GL_CALL(X) GR_GL_CALL(this->glInterface(), X)
 #define GL_CALL_RET(RET, X) GR_GL_CALL_RET(this->glInterface(), RET, X)
 #define SKIP_CACHE_CHECK    true
 #if GR_GL_CHECK_ALLOC_WITH_GET_ERROR
     #define CLEAR_ERROR_BEFORE_ALLOC(iface)   GrGLClearErr(iface)
     #define GL_ALLOC_CALL(iface, call)        GR_GL_CALL_NOERRCHECK(iface, call)
     #define CHECK_ALLOC_ERROR(iface)          GR_GL_GET_ERROR(iface)
 #else
     #define CLEAR_ERROR_BEFORE_ALLOC(iface)
     #define GL_ALLOC_CALL(iface, call)        GR_GL_CALL(iface, call)
     #define CHECK_ALLOC_ERROR(iface)          GR_GL_NO_ERROR
 #endif
 ///////////////////////////////////////////////////////////////////////////////
 static const GrGLenum gXfermodeCoeff2Blend[] = {
     GR_GL_ZERO,
     GR_GL_ONE,
     GR_GL_SRC_COLOR,
     GR_GL_ONE_MINUS_SRC_COLOR,
     GR_GL_DST_COLOR,
     GR_GL_ONE_MINUS_DST_COLOR,
     GR_GL_SRC_ALPHA,
     GR_GL_ONE_MINUS_SRC_ALPHA,
     GR_GL_DST_ALPHA,
     GR_GL_ONE_MINUS_DST_ALPHA,
     GR_GL_CONSTANT_COLOR,
     GR_GL_ONE_MINUS_CONSTANT_COLOR,
     GR_GL_CONSTANT_ALPHA,
     GR_GL_ONE_MINUS_CONSTANT_ALPHA,
     // extended blend coeffs
     GR_GL_SRC1_COLOR,
     GR_GL_ONE_MINUS_SRC1_COLOR,
     GR_GL_SRC1_ALPHA,
     GR_GL_ONE_MINUS_SRC1_ALPHA,
 };
 bool GrGpuGL::BlendCoeffReferencesConstant(GrBlendCoeff coeff) {
     static const bool gCoeffReferencesBlendConst[] = {
         false,
         false,
         false,
         false,
         false,
         false,
         false,
         false,
         false,
         false,
         true,
         true,
         true,
         true,
         // extended blend coeffs
         false,
         false,
         false,
         false,
     };
     return gCoeffReferencesBlendConst[coeff];
     GR_STATIC_ASSERT(kTotalGrBlendCoeffCount ==
                      GR_ARRAY_COUNT(gCoeffReferencesBlendConst));
     GR_STATIC_ASSERT(0 == kZero_GrBlendCoeff);
     GR_STATIC_ASSERT(1 == kOne_GrBlendCoeff);
     GR_STATIC_ASSERT(2 == kSC_GrBlendCoeff);
     GR_STATIC_ASSERT(3 == kISC_GrBlendCoeff);
     GR_STATIC_ASSERT(4 == kDC_GrBlendCoeff);
     GR_STATIC_ASSERT(5 == kIDC_GrBlendCoeff);
     GR_STATIC_ASSERT(6 == kSA_GrBlendCoeff);
     GR_STATIC_ASSERT(7 == kISA_GrBlendCoeff);
     GR_STATIC_ASSERT(8 == kDA_GrBlendCoeff);
     GR_STATIC_ASSERT(9 == kIDA_GrBlendCoeff);
     GR_STATIC_ASSERT(10 == kConstC_GrBlendCoeff);
     GR_STATIC_ASSERT(11 == kIConstC_GrBlendCoeff);
     GR_STATIC_ASSERT(12 == kConstA_GrBlendCoeff);
     GR_STATIC_ASSERT(13 == kIConstA_GrBlendCoeff);
     GR_STATIC_ASSERT(14 == kS2C_GrBlendCoeff);
     GR_STATIC_ASSERT(15 == kIS2C_GrBlendCoeff);
     GR_STATIC_ASSERT(16 == kS2A_GrBlendCoeff);
     GR_STATIC_ASSERT(17 == kIS2A_GrBlendCoeff);
     // assertion for gXfermodeCoeff2Blend have to be in GrGpu scope
     GR_STATIC_ASSERT(kTotalGrBlendCoeffCount ==
                      GR_ARRAY_COUNT(gXfermodeCoeff2Blend));
 }
 ///////////////////////////////////////////////////////////////////////////////
 static bool gPrintStartupSpew;
 GrGpuGL::GrGpuGL(const GrGLContext& ctx, GrContext* context)
     : GrGpu(context)
     , fGLContext(ctx) {
     SkASSERT(ctx.isInitialized());
     fCaps.reset(SkRef(ctx.caps()));
     fHWBoundTextures.reset(this->glCaps().maxFragmentTextureUnits());
     fHWTexGenSettings.reset(this->glCaps().maxFixedFunctionTextureCoords());
     GrGLClearErr(fGLContext.interface());
     if (gPrintStartupSpew) {
         const GrGLubyte* vendor;
         const GrGLubyte* renderer;
         const GrGLubyte* version;
         GL_CALL_RET(vendor, GetString(GR_GL_VENDOR));
         GL_CALL_RET(renderer, GetString(GR_GL_RENDERER));
         GL_CALL_RET(version, GetString(GR_GL_VERSION));
         GrPrintf("------------------------- create GrGpuGL %p --------------\n",
                  this);
         GrPrintf("------ VENDOR %s\n", vendor);
         GrPrintf("------ RENDERER %s\n", renderer);
         GrPrintf("------ VERSION %s\n",  version);
         GrPrintf("------ EXTENSIONS\n");
 #if 0  // TODO: Reenable this after GrGLInterface's extensions can be accessed safely.
        ctx.extensions().print();
 #endif
         GrPrintf("\n");
         GrPrintf(this->glCaps().dump().c_str());
     }
     fProgramCache = SkNEW_ARGS(ProgramCache, (this));
     SkASSERT(this->glCaps().maxVertexAttributes() >= GrDrawState::kMaxVertexAttribCnt);
     fLastSuccessfulStencilFmtIdx = 0;
     fHWProgramID = 0;
 }
 GrGpuGL::~GrGpuGL() {
     if (0 != fHWProgramID) {
         // detach the current program so there is no confusion on OpenGL's part
         // that we want it to be deleted
         SkASSERT(fHWProgramID == fCurrentProgram->programID());
         GL_CALL(UseProgram(0));
     }
     delete fProgramCache;
     // This must be called by before the GrDrawTarget destructor
     this->releaseGeometry();
     // This subclass must do this before the base class destructor runs
     // since we will unref the GrGLInterface.
     this->releaseResources();
 }
 ///////////////////////////////////////////////////////////////////////////////
 GrPixelConfig GrGpuGL::preferredReadPixelsConfig(GrPixelConfig readConfig,
                                                  GrPixelConfig surfaceConfig) const {
     if (GR_GL_RGBA_8888_PIXEL_OPS_SLOW && kRGBA_8888_GrPixelConfig == readConfig) {
         return kBGRA_8888_GrPixelConfig;
     } else if (this->glContext().isMesa() &&
                GrBytesPerPixel(readConfig) == 4 &&
                GrPixelConfigSwapRAndB(readConfig) == surfaceConfig) {
         // Mesa 3D takes a slow path on when reading back  BGRA from an RGBA surface and vice-versa.
         // Perhaps this should be guarded by some compiletime or runtime check.
         return surfaceConfig;
     } else if (readConfig == kBGRA_8888_GrPixelConfig &&
                !this->glCaps().readPixelsSupported(this->glInterface(),
                                                    GR_GL_BGRA, GR_GL_UNSIGNED_BYTE)) {
         return kRGBA_8888_GrPixelConfig;
     } else {
         return readConfig;
     }
 }
 GrPixelConfig GrGpuGL::preferredWritePixelsConfig(GrPixelConfig writeConfig,
                                                   GrPixelConfig surfaceConfig) const {
     if (GR_GL_RGBA_8888_PIXEL_OPS_SLOW && kRGBA_8888_GrPixelConfig == writeConfig) {
         return kBGRA_8888_GrPixelConfig;
     } else {
         return writeConfig;
     }
 }
 bool GrGpuGL::canWriteTexturePixels(const GrTexture* texture, GrPixelConfig srcConfig) const {
     if (kIndex_8_GrPixelConfig == srcConfig || kIndex_8_GrPixelConfig == texture->config()) {
         return false;
     }
     if (srcConfig != texture->config() && kGLES_GrGLStandard == this->glStandard()) {
         // In general ES2 requires the internal format of the texture and the format of the src
         // pixels to match. However, It may or may not be possible to upload BGRA data to a RGBA
         // texture. It depends upon which extension added BGRA. The Apple extension allows it
         // (BGRA's internal format is RGBA) while the EXT extension does not (BGRA is its own
         // internal format).
         if (this->glCaps().bgraFormatSupport() &&
             !this->glCaps().bgraIsInternalFormat() &&
             kBGRA_8888_GrPixelConfig == srcConfig &&
             kRGBA_8888_GrPixelConfig == texture->config()) {
             return true;
         } else {
             return false;
         }
     } else {
         return true;
     }
 }
 bool GrGpuGL::fullReadPixelsIsFasterThanPartial() const {
     return SkToBool(GR_GL_FULL_READPIXELS_FASTER_THAN_PARTIAL);
 }
 void GrGpuGL::onResetContext(uint32_t resetBits) {
     // we don't use the zb at all
     if (resetBits & kMisc_GrGLBackendState) {
         GL_CALL(Disable(GR_GL_DEPTH_TEST));
         GL_CALL(DepthMask(GR_GL_FALSE));
         fHWDrawFace = GrDrawState::kInvalid_DrawFace;
         fHWDitherEnabled = kUnknown_TriState;
         if (kGL_GrGLStandard == this->glStandard()) {
             // Desktop-only state that we never change
             if (!this->glCaps().isCoreProfile()) {
                 GL_CALL(Disable(GR_GL_POINT_SMOOTH));
                 GL_CALL(Disable(GR_GL_LINE_SMOOTH));
                 GL_CALL(Disable(GR_GL_POLYGON_SMOOTH));
                 GL_CALL(Disable(GR_GL_POLYGON_STIPPLE));
                 GL_CALL(Disable(GR_GL_COLOR_LOGIC_OP));
                 GL_CALL(Disable(GR_GL_INDEX_LOGIC_OP));
             }
             // The windows NVIDIA driver has GL_ARB_imaging in the extension string when using a
             // core profile. This seems like a bug since the core spec removes any mention of
             // GL_ARB_imaging.
             if (this->glCaps().imagingSupport() && !this->glCaps().isCoreProfile()) {
                 GL_CALL(Disable(GR_GL_COLOR_TABLE));
             }
             GL_CALL(Disable(GR_GL_POLYGON_OFFSET_FILL));
             // Since ES doesn't support glPointSize at all we always use the VS to
             // set the point size
             GL_CALL(Enable(GR_GL_VERTEX_PROGRAM_POINT_SIZE));
             // We should set glPolygonMode(FRONT_AND_BACK,FILL) here, too. It isn't
             // currently part of our gl interface. There are probably others as
             // well.
         }
         fHWWriteToColor = kUnknown_TriState;
         // we only ever use lines in hairline mode
         GL_CALL(LineWidth(1));
     }
     if (resetBits & kAA_GrGLBackendState) {
         fHWAAState.invalidate();
     }
     fHWActiveTextureUnitIdx = -1; // invalid
     if (resetBits & kTextureBinding_GrGLBackendState) {
         for (int s = 0; s < fHWBoundTextures.count(); ++s) {
             fHWBoundTextures[s] = NULL;
         }
     }
     if (resetBits & kBlend_GrGLBackendState) {
         fHWBlendState.invalidate();
     }
     if (resetBits & kView_GrGLBackendState) {
         fHWScissorSettings.invalidate();
         fHWViewport.invalidate();
     }
     if (resetBits & kStencil_GrGLBackendState) {
         fHWStencilSettings.invalidate();
         fHWStencilTestEnabled = kUnknown_TriState;
     }
     // Vertex
     if (resetBits & kVertex_GrGLBackendState) {
         fHWGeometryState.invalidate();
     }
     if (resetBits & kRenderTarget_GrGLBackendState) {
         fHWBoundRenderTarget = NULL;
     }
     if (resetBits & (kFixedFunction_GrGLBackendState | kPathRendering_GrGLBackendState)) {
         if (this->glCaps().fixedFunctionSupport()) {
             fHWProjectionMatrixState.invalidate();
             // we don't use the model view matrix.
             GL_CALL(MatrixMode(GR_GL_MODELVIEW));
             GL_CALL(LoadIdentity());
             for (int i = 0; i < this->glCaps().maxFixedFunctionTextureCoords(); ++i) {
                 GL_CALL(ActiveTexture(GR_GL_TEXTURE0 + i));
                 GL_CALL(Disable(GR_GL_TEXTURE_GEN_S));
                 GL_CALL(Disable(GR_GL_TEXTURE_GEN_T));
                 GL_CALL(Disable(GR_GL_TEXTURE_GEN_Q));
                 GL_CALL(Disable(GR_GL_TEXTURE_GEN_R));
                 if (this->caps()->pathRenderingSupport()) {
                     GL_CALL(PathTexGen(GR_GL_TEXTURE0 + i, GR_GL_NONE, 0, NULL));
                 }
                 fHWTexGenSettings[i].fMode = GR_GL_NONE;
                 fHWTexGenSettings[i].fNumComponents = 0;
             }
             fHWActiveTexGenSets = 0;
         }
         if (this->caps()->pathRenderingSupport()) {
             fHWPathStencilSettings.invalidate();
         }
     }
     // we assume these values
     if (resetBits & kPixelStore_GrGLBackendState) {
         if (this->glCaps().unpackRowLengthSupport()) {
             GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
         }
         if (this->glCaps().packRowLengthSupport()) {
             GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH, 0));
         }
         if (this->glCaps().unpackFlipYSupport()) {
             GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_FALSE));
         }
         if (this->glCaps().packFlipYSupport()) {
             GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, GR_GL_FALSE));
         }
     }
     if (resetBits & kProgram_GrGLBackendState) {
         fHWProgramID = 0;
         fSharedGLProgramState.invalidate();
     }
 }
 namespace {
 GrSurfaceOrigin resolve_origin(GrSurfaceOrigin origin, bool renderTarget) {
     // By default, GrRenderTargets are GL's normal orientation so that they
     // can be drawn to by the outside world without the client having
     // to render upside down.
     if (kDefault_GrSurfaceOrigin == origin) {
         return renderTarget ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
     } else {
         return origin;
     }
 }
 }
 GrTexture* GrGpuGL::onWrapBackendTexture(const GrBackendTextureDesc& desc) {
     if (!this->configToGLFormats(desc.fConfig, false, NULL, NULL, NULL)) {
         return NULL;
     }
     if (0 == desc.fTextureHandle) {
         return NULL;
     }
     int maxSize = this->caps()->maxTextureSize();
     if (desc.fWidth > maxSize || desc.fHeight > maxSize) {
         return NULL;
     }
     GrGLTexture::Desc glTexDesc;
     // next line relies on GrBackendTextureDesc's flags matching GrTexture's
     glTexDesc.fFlags = (GrTextureFlags) desc.fFlags;
     glTexDesc.fWidth = desc.fWidth;
     glTexDesc.fHeight = desc.fHeight;
     glTexDesc.fConfig = desc.fConfig;
     glTexDesc.fSampleCnt = desc.fSampleCnt;
     glTexDesc.fTextureID = static_cast<GrGLuint>(desc.fTextureHandle);
     glTexDesc.fIsWrapped = true;
     bool renderTarget = SkToBool(desc.fFlags & kRenderTarget_GrBackendTextureFlag);
     // FIXME:  this should be calling resolve_origin(), but Chrome code is currently
     // assuming the old behaviour, which is that backend textures are always
     // BottomLeft, even for non-RT's.  Once Chrome is fixed, change this to:
     // glTexDesc.fOrigin = resolve_origin(desc.fOrigin, renderTarget);
     if (kDefault_GrSurfaceOrigin == desc.fOrigin) {
         glTexDesc.fOrigin = kBottomLeft_GrSurfaceOrigin;
     } else {
         glTexDesc.fOrigin = desc.fOrigin;
     }
     GrGLTexture* texture = NULL;
     if (renderTarget) {
         GrGLRenderTarget::Desc glRTDesc;
         glRTDesc.fRTFBOID = 0;
         glRTDesc.fTexFBOID = 0;
         glRTDesc.fMSColorRenderbufferID = 0;
         glRTDesc.fConfig = desc.fConfig;
         glRTDesc.fSampleCnt = desc.fSampleCnt;
         glRTDesc.fOrigin = glTexDesc.fOrigin;
         glRTDesc.fCheckAllocation = false;
         if (!this->createRenderTargetObjects(glTexDesc.fWidth,
                                              glTexDesc.fHeight,
                                              glTexDesc.fTextureID,
                                              &glRTDesc)) {
             return NULL;
         }
         texture = SkNEW_ARGS(GrGLTexture, (this, glTexDesc, glRTDesc));
     } else {
         texture = SkNEW_ARGS(GrGLTexture, (this, glTexDesc));
     }
     if (NULL == texture) {
         return NULL;
     }
     return texture;
 }
 GrRenderTarget* GrGpuGL::onWrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc) {
     GrGLRenderTarget::Desc glDesc;
     glDesc.fConfig = desc.fConfig;
     glDesc.fRTFBOID = static_cast<GrGLuint>(desc.fRenderTargetHandle);
     glDesc.fMSColorRenderbufferID = 0;
     glDesc.fTexFBOID = GrGLRenderTarget::kUnresolvableFBOID;
     glDesc.fSampleCnt = desc.fSampleCnt;
     glDesc.fIsWrapped = true;
     glDesc.fCheckAllocation = false;
     glDesc.fOrigin = resolve_origin(desc.fOrigin, true);
     GrGLIRect viewport;
     viewport.fLeft   = 0;
     viewport.fBottom = 0;
     viewport.fWidth  = desc.fWidth;
     viewport.fHeight = desc.fHeight;
     GrRenderTarget* tgt = SkNEW_ARGS(GrGLRenderTarget,
                                      (this, glDesc, viewport));
     if (desc.fStencilBits) {
         GrGLStencilBuffer::Format format;
         format.fInternalFormat = GrGLStencilBuffer::kUnknownInternalFormat;
         format.fPacked = false;
         format.fStencilBits = desc.fStencilBits;
         format.fTotalBits = desc.fStencilBits;
         static const bool kIsSBWrapped = false;
         GrGLStencilBuffer* sb = SkNEW_ARGS(GrGLStencilBuffer,
                                            (this,
                                             kIsSBWrapped,
 ,
                                             desc.fWidth,
                                             desc.fHeight,
                                             desc.fSampleCnt,
                                             format));
         tgt->setStencilBuffer(sb);
         sb->unref();
     }
     return tgt;
 }
 ////////////////////////////////////////////////////////////////////////////////
 bool GrGpuGL::onWriteTexturePixels(GrTexture* texture,
                                    int left, int top, int width, int height,
                                    GrPixelConfig config, const void* buffer,
                                    size_t rowBytes) {
     if (NULL == buffer) {
         return false;
     }
     GrGLTexture* glTex = static_cast<GrGLTexture*>(texture);
     this->setScratchTextureUnit();
     GL_CALL(BindTexture(GR_GL_TEXTURE_2D, glTex->textureID()));
     GrGLTexture::Desc desc;
     desc.fFlags = glTex->desc().fFlags;
     desc.fWidth = glTex->width();
     desc.fHeight = glTex->height();
     desc.fConfig = glTex->config();
     desc.fSampleCnt = glTex->desc().fSampleCnt;
     desc.fTextureID = glTex->textureID();
     desc.fOrigin = glTex->origin();
     if (this->uploadTexData(desc, false,
                             left, top, width, height,
                             config, buffer, rowBytes)) {
         texture->dirtyMipMaps(true);
         return true;
     } else {
         return false;
     }
 }
 namespace {
 bool adjust_pixel_ops_params(int surfaceWidth,
                              int surfaceHeight,
                              size_t bpp,
                              int* left, int* top, int* width, int* height,
                              const void** data,
                              size_t* rowBytes) {
     if (!*rowBytes) {
         *rowBytes = *width * bpp;
     }
     SkIRect subRect = SkIRect::MakeXYWH(*left, *top, *width, *height);
     SkIRect bounds = SkIRect::MakeWH(surfaceWidth, surfaceHeight);
     if (!subRect.intersect(bounds)) {
         return false;
     }
     *data = reinterpret_cast<const void*>(reinterpret_cast<intptr_t>(*data) +
           (subRect.fTop - *top) * *rowBytes + (subRect.fLeft - *left) * bpp);
     *left = subRect.fLeft;
     *top = subRect.fTop;
     *width = subRect.width();
     *height = subRect.height();
     return true;
 }
 GrGLenum check_alloc_error(const GrTextureDesc& desc, const GrGLInterface* interface) {
     if (SkToBool(desc.fFlags & kCheckAllocation_GrTextureFlagBit)) {
         return GR_GL_GET_ERROR(interface);
     } else {
         return CHECK_ALLOC_ERROR(interface);
     }
 }
 }
 bool GrGpuGL::uploadTexData(const GrGLTexture::Desc& desc,
                             bool isNewTexture,
                             int left, int top, int width, int height,
                             GrPixelConfig dataConfig,
                             const void* data,
                             size_t rowBytes) {
     SkASSERT(NULL != data || isNewTexture);
     size_t bpp = GrBytesPerPixel(dataConfig);
     if (!adjust_pixel_ops_params(desc.fWidth, desc.fHeight, bpp, &left, &top,
                                  &width, &height, &data, &rowBytes)) {
         return false;
     }
     size_t trimRowBytes = width * bpp;
     // in case we need a temporary, trimmed copy of the src pixels
     SkAutoSMalloc<128 * 128> tempStorage;
     // paletted textures cannot be partially updated
     // We currently lazily create MIPMAPs when the we see a draw with
     // GrTextureParams::kMipMap_FilterMode. Using texture storage requires that the
     // MIP levels are all created when the texture is created. So for now we don't use
     // texture storage.
     bool useTexStorage = false &&
                          isNewTexture &&
                          desc.fConfig != kIndex_8_GrPixelConfig &&
                          this->glCaps().texStorageSupport();
     if (useTexStorage && kGL_GrGLStandard == this->glStandard()) {
         // 565 is not a sized internal format on desktop GL. So on desktop with
         // 565 we always use an unsized internal format to let the system pick
         // the best sized format to convert the 565 data to. Since TexStorage
         // only allows sized internal formats we will instead use TexImage2D.
         useTexStorage = desc.fConfig != kRGB_565_GrPixelConfig;
     }
     GrGLenum internalFormat;
     GrGLenum externalFormat;
     GrGLenum externalType;
     // glTexStorage requires sized internal formats on both desktop and ES. ES2 requires an unsized
     // format for glTexImage, unlike ES3 and desktop. However, we allow the driver to decide the
     // size of the internal format whenever possible and so only use a sized internal format when
     // using texture storage.
     if (!this->configToGLFormats(dataConfig, useTexStorage, &internalFormat,
                                  &externalFormat, &externalType)) {
         return false;
     }
     if (!isNewTexture && GR_GL_PALETTE8_RGBA8 == internalFormat) {
         // paletted textures cannot be updated
         return false;
     }
     /*
      *  check whether to allocate a temporary buffer for flipping y or
      *  because our srcData has extra bytes past each row. If so, we need
      *  to trim those off here, since GL ES may not let us specify
      *  GL_UNPACK_ROW_LENGTH.
      */
     bool restoreGLRowLength = false;
     bool swFlipY = false;
     bool glFlipY = false;
     if (NULL != data) {
         if (kBottomLeft_GrSurfaceOrigin == desc.fOrigin) {
             if (this->glCaps().unpackFlipYSupport()) {
                 glFlipY = true;
             } else {
                 swFlipY = true;
             }
         }
         if (this->glCaps().unpackRowLengthSupport() && !swFlipY) {
             // can't use this for flipping, only non-neg values allowed. :(
             if (rowBytes != trimRowBytes) {
                 GrGLint rowLength = static_cast<GrGLint>(rowBytes / bpp);
                 GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, rowLength));
                 restoreGLRowLength = true;
             }
         } else {
             if (trimRowBytes != rowBytes || swFlipY) {
                 // copy data into our new storage, skipping the trailing bytes
                 size_t trimSize = height * trimRowBytes;
                 const char* src = (const char*)data;
                 if (swFlipY) {
                     src += (height - 1) * rowBytes;
                 }
                 char* dst = (char*)tempStorage.reset(trimSize);
                 for (int y = 0; y < height; y++) {
                     memcpy(dst, src, trimRowBytes);
                     if (swFlipY) {
                         src -= rowBytes;
                     } else {
                         src += rowBytes;
                     }
                     dst += trimRowBytes;
                 }
                 // now point data to our copied version
                 data = tempStorage.get();
             }
         }
         if (glFlipY) {
             GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_TRUE));
         }
         GL_CALL(PixelStorei(GR_GL_UNPACK_ALIGNMENT, static_cast<GrGLint>(bpp)));
     }
     bool succeeded = true;
     if (isNewTexture &&
 == left && 0 == top &&
         desc.fWidth == width && desc.fHeight == height) {
         CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
         if (useTexStorage) {
             // We never resize  or change formats of textures.
             GL_ALLOC_CALL(this->glInterface(),
                           TexStorage2D(GR_GL_TEXTURE_2D,
 , // levels
                                        internalFormat,
                                        desc.fWidth, desc.fHeight));
         } else {
             if (GR_GL_PALETTE8_RGBA8 == internalFormat) {
                 GrGLsizei imageSize = desc.fWidth * desc.fHeight +
                                       kGrColorTableSize;
                 GL_ALLOC_CALL(this->glInterface(),
                               CompressedTexImage2D(GR_GL_TEXTURE_2D,
 , // level
                                                    internalFormat,
                                                    desc.fWidth, desc.fHeight,
 , // border
                                                    imageSize,
                                                    data));
             } else {
                 GL_ALLOC_CALL(this->glInterface(),
                               TexImage2D(GR_GL_TEXTURE_2D,
 , // level
                                          internalFormat,
                                          desc.fWidth, desc.fHeight,
 , // border
                                          externalFormat, externalType,
                                          data));
             }
         }
         GrGLenum error = check_alloc_error(desc, this->glInterface());
         if (error != GR_GL_NO_ERROR) {
             succeeded = false;
         } else {
             // if we have data and we used TexStorage to create the texture, we
             // now upload with TexSubImage.
             if (NULL != data && useTexStorage) {
                 GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D,
 , // level
                                       left, top,
                                       width, height,
                                       externalFormat, externalType,
                                       data));
             }
         }
     } else {
         if (swFlipY || glFlipY) {
             top = desc.fHeight - (top + height);
         }
         GL_CALL(TexSubImage2D(GR_GL_TEXTURE_2D,
 , // level
                               left, top,
                               width, height,
                               externalFormat, externalType, data));
     }
     if (restoreGLRowLength) {
         SkASSERT(this->glCaps().unpackRowLengthSupport());
         GL_CALL(PixelStorei(GR_GL_UNPACK_ROW_LENGTH, 0));
     }
     if (glFlipY) {
         GL_CALL(PixelStorei(GR_GL_UNPACK_FLIP_Y, GR_GL_FALSE));
     }
     return succeeded;
 }
 static bool renderbuffer_storage_msaa(GrGLContext& ctx,
                                       int sampleCount,
                                       GrGLenum format,
                                       int width, int height) {
     CLEAR_ERROR_BEFORE_ALLOC(ctx.interface());
     SkASSERT(GrGLCaps::kNone_MSFBOType != ctx.caps()->msFBOType());
     switch (ctx.caps()->msFBOType()) {
         case GrGLCaps::kDesktop_ARB_MSFBOType:
         case GrGLCaps::kDesktop_EXT_MSFBOType:
         case GrGLCaps::kES_3_0_MSFBOType:
             GL_ALLOC_CALL(ctx.interface(),
                             RenderbufferStorageMultisample(GR_GL_RENDERBUFFER,
                                                             sampleCount,
                                                             format,
                                                             width, height));
             break;
         case GrGLCaps::kES_Apple_MSFBOType:
             GL_ALLOC_CALL(ctx.interface(),
                             RenderbufferStorageMultisampleES2APPLE(GR_GL_RENDERBUFFER,
                                                                     sampleCount,
                                                                     format,
                                                                     width, height));
             break;
         case GrGLCaps::kES_EXT_MsToTexture_MSFBOType:
         case GrGLCaps::kES_IMG_MsToTexture_MSFBOType:
             GL_ALLOC_CALL(ctx.interface(),
                             RenderbufferStorageMultisampleES2EXT(GR_GL_RENDERBUFFER,
                                                                 sampleCount,
                                                                 format,
                                                                 width, height));
             break;
         case GrGLCaps::kNone_MSFBOType:
             GrCrash("Shouldn't be here if we don't support multisampled renderbuffers.");
             break;
     }
     return (GR_GL_NO_ERROR == CHECK_ALLOC_ERROR(ctx.interface()));;
 }
 bool GrGpuGL::createRenderTargetObjects(int width, int height,
                                         GrGLuint texID,
                                         GrGLRenderTarget::Desc* desc) {
     desc->fMSColorRenderbufferID = 0;
     desc->fRTFBOID = 0;
     desc->fTexFBOID = 0;
     desc->fIsWrapped = false;
     GrGLenum status;
     GrGLenum msColorFormat = 0; // suppress warning
     if (desc->fSampleCnt > 0 && GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType()) {
         goto FAILED;
     }
     GL_CALL(GenFramebuffers(1, &desc->fTexFBOID));
     if (!desc->fTexFBOID) {
         goto FAILED;
     }
     // If we are using multisampling we will create two FBOS. We render to one and then resolve to
     // the texture bound to the other. The exception is the IMG multisample extension. With this
     // extension the texture is multisampled when rendered to and then auto-resolves it when it is
     // rendered from.
     if (desc->fSampleCnt > 0 && this->glCaps().usesMSAARenderBuffers()) {
         GL_CALL(GenFramebuffers(1, &desc->fRTFBOID));
         GL_CALL(GenRenderbuffers(1, &desc->fMSColorRenderbufferID));
         if (!desc->fRTFBOID ||
             !desc->fMSColorRenderbufferID ||
             !this->configToGLFormats(desc->fConfig,
                                      // ES2 and ES3 require sized internal formats for rb storage.
                                      kGLES_GrGLStandard == this->glStandard(),
                                      &msColorFormat,
                                      NULL,
                                      NULL)) {
             goto FAILED;
         }
     } else {
         desc->fRTFBOID = desc->fTexFBOID;
     }
     // below here we may bind the FBO
     fHWBoundRenderTarget = NULL;
     if (desc->fRTFBOID != desc->fTexFBOID) {
         SkASSERT(desc->fSampleCnt > 0);
         GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER,
                                desc->fMSColorRenderbufferID));
         if (!renderbuffer_storage_msaa(fGLContext,
                                        desc->fSampleCnt,
                                        msColorFormat,
                                        width, height)) {
             goto FAILED;
         }
         GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, desc->fRTFBOID));
         GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
                                       GR_GL_COLOR_ATTACHMENT0,
                                       GR_GL_RENDERBUFFER,
                                       desc->fMSColorRenderbufferID));
         if (desc->fCheckAllocation ||
             !this->glCaps().isConfigVerifiedColorAttachment(desc->fConfig)) {
             GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
             if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
                 goto FAILED;
             }
             fGLContext.caps()->markConfigAsValidColorAttachment(desc->fConfig);
         }
     }
     GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, desc->fTexFBOID));
     if (this->glCaps().usesImplicitMSAAResolve() && desc->fSampleCnt > 0) {
         GL_CALL(FramebufferTexture2DMultisample(GR_GL_FRAMEBUFFER,
                                                 GR_GL_COLOR_ATTACHMENT0,
                                                 GR_GL_TEXTURE_2D,
                                                 texID, 0, desc->fSampleCnt));
     } else {
         GL_CALL(FramebufferTexture2D(GR_GL_FRAMEBUFFER,
                                      GR_GL_COLOR_ATTACHMENT0,
                                      GR_GL_TEXTURE_2D,
                                      texID, 0));
     }
     if (desc->fCheckAllocation ||
         !this->glCaps().isConfigVerifiedColorAttachment(desc->fConfig)) {
         GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
         if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
             goto FAILED;
         }
         fGLContext.caps()->markConfigAsValidColorAttachment(desc->fConfig);
     }
     return true;
 FAILED:
     if (desc->fMSColorRenderbufferID) {
         GL_CALL(DeleteRenderbuffers(1, &desc->fMSColorRenderbufferID));
     }
     if (desc->fRTFBOID != desc->fTexFBOID) {
         GL_CALL(DeleteFramebuffers(1, &desc->fRTFBOID));
     }
     if (desc->fTexFBOID) {
         GL_CALL(DeleteFramebuffers(1, &desc->fTexFBOID));
     }
     return false;
 }
 // good to set a break-point here to know when createTexture fails
 static GrTexture* return_null_texture() {
 //    SkDEBUGFAIL("null texture");
     return NULL;
 }
 #if 0 && defined(SK_DEBUG)
 static size_t as_size_t(int x) {
     return x;
 }
 #endif
 GrTexture* GrGpuGL::onCreateTexture(const GrTextureDesc& desc,
                                     const void* srcData,
                                     size_t rowBytes) {
     GrGLTexture::Desc glTexDesc;
     GrGLRenderTarget::Desc  glRTDesc;
     // Attempt to catch un- or wrongly initialized sample counts;
     SkASSERT(desc.fSampleCnt >= 0 && desc.fSampleCnt <= 64);
     // We fail if the MSAA was requested and is not available.
     if (GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType() && desc.fSampleCnt) {
         //GrPrintf("MSAA RT requested but not supported on this platform.");
         return return_null_texture();
     }
     // If the sample count exceeds the max then we clamp it.
     glTexDesc.fSampleCnt = GrMin(desc.fSampleCnt, this->caps()->maxSampleCount());
     glTexDesc.fFlags  = desc.fFlags;
     glTexDesc.fWidth  = desc.fWidth;
     glTexDesc.fHeight = desc.fHeight;
     glTexDesc.fConfig = desc.fConfig;
     glTexDesc.fIsWrapped = false;
     glRTDesc.fMSColorRenderbufferID = 0;
     glRTDesc.fRTFBOID = 0;
     glRTDesc.fTexFBOID = 0;
     glRTDesc.fIsWrapped = false;
     glRTDesc.fConfig = glTexDesc.fConfig;
     glRTDesc.fCheckAllocation = SkToBool(desc.fFlags & kCheckAllocation_GrTextureFlagBit);
     bool renderTarget = SkToBool(desc.fFlags & kRenderTarget_GrTextureFlagBit);
     glTexDesc.fOrigin = resolve_origin(desc.fOrigin, renderTarget);
     glRTDesc.fOrigin = glTexDesc.fOrigin;
     glRTDesc.fSampleCnt = glTexDesc.fSampleCnt;
     if (GrGLCaps::kNone_MSFBOType == this->glCaps().msFBOType() &&
         desc.fSampleCnt) {
         //GrPrintf("MSAA RT requested but not supported on this platform.");
         return return_null_texture();
     }
     if (renderTarget) {
         int maxRTSize = this->caps()->maxRenderTargetSize();
         if (glTexDesc.fWidth > maxRTSize || glTexDesc.fHeight > maxRTSize) {
             return return_null_texture();
         }
     } else {
         int maxSize = this->caps()->maxTextureSize();
         if (glTexDesc.fWidth > maxSize || glTexDesc.fHeight > maxSize) {
             return return_null_texture();
         }
     }
     GL_CALL(GenTextures(1, &glTexDesc.fTextureID));
     if (!glTexDesc.fTextureID) {
         return return_null_texture();
     }
     this->setScratchTextureUnit();
     GL_CALL(BindTexture(GR_GL_TEXTURE_2D, glTexDesc.fTextureID));
     if (renderTarget && this->glCaps().textureUsageSupport()) {
         // provides a hint about how this texture will be used
         GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                               GR_GL_TEXTURE_USAGE,
                               GR_GL_FRAMEBUFFER_ATTACHMENT));
     }
     // Some drivers like to know filter/wrap before seeing glTexImage2D. Some
     // drivers have a bug where an FBO won't be complete if it includes a
     // texture that is not mipmap complete (considering the filter in use).
     GrGLTexture::TexParams initialTexParams;
     // we only set a subset here so invalidate first
     initialTexParams.invalidate();
     initialTexParams.fMinFilter = GR_GL_NEAREST;
     initialTexParams.fMagFilter = GR_GL_NEAREST;
     initialTexParams.fWrapS = GR_GL_CLAMP_TO_EDGE;
     initialTexParams.fWrapT = GR_GL_CLAMP_TO_EDGE;
     GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                           GR_GL_TEXTURE_MAG_FILTER,
                           initialTexParams.fMagFilter));
     GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                           GR_GL_TEXTURE_MIN_FILTER,
                           initialTexParams.fMinFilter));
     GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                           GR_GL_TEXTURE_WRAP_S,
                           initialTexParams.fWrapS));
     GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                           GR_GL_TEXTURE_WRAP_T,
                           initialTexParams.fWrapT));
     if (!this->uploadTexData(glTexDesc, true, 0, 0,
                              glTexDesc.fWidth, glTexDesc.fHeight,
                              desc.fConfig, srcData, rowBytes)) {
         GL_CALL(DeleteTextures(1, &glTexDesc.fTextureID));
         return return_null_texture();
     }
     GrGLTexture* tex;
     if (renderTarget) {
         // unbind the texture from the texture unit before binding it to the frame buffer
         GL_CALL(BindTexture(GR_GL_TEXTURE_2D, 0));
         if (!this->createRenderTargetObjects(glTexDesc.fWidth,
                                              glTexDesc.fHeight,
                                              glTexDesc.fTextureID,
                                              &glRTDesc)) {
             GL_CALL(DeleteTextures(1, &glTexDesc.fTextureID));
             return return_null_texture();
         }
         tex = SkNEW_ARGS(GrGLTexture, (this, glTexDesc, glRTDesc));
     } else {
         tex = SkNEW_ARGS(GrGLTexture, (this, glTexDesc));
     }
     tex->setCachedTexParams(initialTexParams, this->getResetTimestamp());
 #ifdef TRACE_TEXTURE_CREATION
     GrPrintf("--- new texture [%d] size=(%d %d) config=%d\n",
              glTexDesc.fTextureID, desc.fWidth, desc.fHeight, desc.fConfig);
 #endif
     return tex;
 }
 namespace {
 const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount;
 void inline get_stencil_rb_sizes(const GrGLInterface* gl,
                                  GrGLStencilBuffer::Format* format) {
     // we shouldn't ever know one size and not the other
     SkASSERT((kUnknownBitCount == format->fStencilBits) ==
              (kUnknownBitCount == format->fTotalBits));
     if (kUnknownBitCount == format->fStencilBits) {
         GR_GL_GetRenderbufferParameteriv(gl, GR_GL_RENDERBUFFER,
                                          GR_GL_RENDERBUFFER_STENCIL_SIZE,
                                          (GrGLint*)&format->fStencilBits);
         if (format->fPacked) {
             GR_GL_GetRenderbufferParameteriv(gl, GR_GL_RENDERBUFFER,
                                              GR_GL_RENDERBUFFER_DEPTH_SIZE,
                                              (GrGLint*)&format->fTotalBits);
             format->fTotalBits += format->fStencilBits;
         } else {
             format->fTotalBits = format->fStencilBits;
         }
     }
 }
 }
 bool GrGpuGL::createStencilBufferForRenderTarget(GrRenderTarget* rt,
                                                  int width, int height) {
     // All internally created RTs are also textures. We don't create
     // SBs for a client's standalone RT (that is a RT that isn't also a texture).
     SkASSERT(rt->asTexture());
     SkASSERT(width >= rt->width());
     SkASSERT(height >= rt->height());
     int samples = rt->numSamples();
     GrGLuint sbID;
     GL_CALL(GenRenderbuffers(1, &sbID));
     if (!sbID) {
         return false;
     }
     int stencilFmtCnt = this->glCaps().stencilFormats().count();
     for (int i = 0; i < stencilFmtCnt; ++i) {
         GL_CALL(BindRenderbuffer(GR_GL_RENDERBUFFER, sbID));
         // we start with the last stencil format that succeeded in hopes
         // that we won't go through this loop more than once after the
         // first (painful) stencil creation.
         int sIdx = (i + fLastSuccessfulStencilFmtIdx) % stencilFmtCnt;
         const GrGLCaps::StencilFormat& sFmt =
                 this->glCaps().stencilFormats()[sIdx];
         CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
         // we do this "if" so that we don't call the multisample
         // version on a GL that doesn't have an MSAA extension.
         bool created;
         if (samples > 0) {
             created = renderbuffer_storage_msaa(fGLContext,
                                                 samples,
                                                 sFmt.fInternalFormat,
                                                 width, height);
         } else {
             GL_ALLOC_CALL(this->glInterface(),
                           RenderbufferStorage(GR_GL_RENDERBUFFER,
                                               sFmt.fInternalFormat,
                                               width, height));
             created =
                 (GR_GL_NO_ERROR == check_alloc_error(rt->desc(), this->glInterface()));
         }
         if (created) {
             // After sized formats we attempt an unsized format and take
             // whatever sizes GL gives us. In that case we query for the size.
             GrGLStencilBuffer::Format format = sFmt;
             get_stencil_rb_sizes(this->glInterface(), &format);
             static const bool kIsWrapped = false;
             SkAutoTUnref<GrStencilBuffer> sb(SkNEW_ARGS(GrGLStencilBuffer,
                                                   (this, kIsWrapped, sbID, width, height,
                                                   samples, format)));
             if (this->attachStencilBufferToRenderTarget(sb, rt)) {
                 fLastSuccessfulStencilFmtIdx = sIdx;
                 sb->transferToCache();
                 rt->setStencilBuffer(sb);
                 return true;
            }
            sb->abandon(); // otherwise we lose sbID
         }
     }
     GL_CALL(DeleteRenderbuffers(1, &sbID));
     return false;
 }
 bool GrGpuGL::attachStencilBufferToRenderTarget(GrStencilBuffer* sb, GrRenderTarget* rt) {
     GrGLRenderTarget* glrt = (GrGLRenderTarget*) rt;
     GrGLuint fbo = glrt->renderFBOID();
     if (NULL == sb) {
         if (NULL != rt->getStencilBuffer()) {
             GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
                                             GR_GL_STENCIL_ATTACHMENT,
                                             GR_GL_RENDERBUFFER, 0));
             GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
                                             GR_GL_DEPTH_ATTACHMENT,
                                             GR_GL_RENDERBUFFER, 0));
 #ifdef SK_DEBUG
             GrGLenum status;
             GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
             SkASSERT(GR_GL_FRAMEBUFFER_COMPLETE == status);
 #endif
         }
         return true;
     } else {
         GrGLStencilBuffer* glsb = static_cast<GrGLStencilBuffer*>(sb);
         GrGLuint rb = glsb->renderbufferID();
         fHWBoundRenderTarget = NULL;
         GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, fbo));
         GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
                                         GR_GL_STENCIL_ATTACHMENT,
                                         GR_GL_RENDERBUFFER, rb));
         if (glsb->format().fPacked) {
             GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
                                             GR_GL_DEPTH_ATTACHMENT,
                                             GR_GL_RENDERBUFFER, rb));
         } else {
             GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
                                             GR_GL_DEPTH_ATTACHMENT,
                                             GR_GL_RENDERBUFFER, 0));
         }
         GrGLenum status;
         if (!this->glCaps().isColorConfigAndStencilFormatVerified(rt->config(), glsb->format())) {
             GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
             if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
                 GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
                                               GR_GL_STENCIL_ATTACHMENT,
                                               GR_GL_RENDERBUFFER, 0));
                 if (glsb->format().fPacked) {
                     GL_CALL(FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
                                                   GR_GL_DEPTH_ATTACHMENT,
                                                   GR_GL_RENDERBUFFER, 0));
                 }
                 return false;
             } else {
                 fGLContext.caps()->markColorConfigAndStencilFormatAsVerified(
                     rt->config(),
                     glsb->format());
             }
         }
         return true;
     }
 }
 ////////////////////////////////////////////////////////////////////////////////
 GrVertexBuffer* GrGpuGL::onCreateVertexBuffer(size_t size, bool dynamic) {
     GrGLVertexBuffer::Desc desc;
     desc.fDynamic = dynamic;
     desc.fSizeInBytes = size;
     desc.fIsWrapped = false;
     if (this->glCaps().useNonVBOVertexAndIndexDynamicData() && desc.fDynamic) {
         desc.fID = 0;
         GrGLVertexBuffer* vertexBuffer = SkNEW_ARGS(GrGLVertexBuffer, (this, desc));
         return vertexBuffer;
     } else {
         GL_CALL(GenBuffers(1, &desc.fID));
         if (desc.fID) {
             fHWGeometryState.setVertexBufferID(this, desc.fID);
             CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
             // make sure driver can allocate memory for this buffer
             GL_ALLOC_CALL(this->glInterface(),
                           BufferData(GR_GL_ARRAY_BUFFER,
                                      (GrGLsizeiptr) desc.fSizeInBytes,
                                      NULL,   // data ptr
                                      desc.fDynamic ? GR_GL_DYNAMIC_DRAW : GR_GL_STATIC_DRAW));
             if (CHECK_ALLOC_ERROR(this->glInterface()) != GR_GL_NO_ERROR) {
                 GL_CALL(DeleteBuffers(1, &desc.fID));
                 this->notifyVertexBufferDelete(desc.fID);
                 return NULL;
             }
             GrGLVertexBuffer* vertexBuffer = SkNEW_ARGS(GrGLVertexBuffer, (this, desc));
             return vertexBuffer;
         }
         return NULL;
     }
 }
 GrIndexBuffer* GrGpuGL::onCreateIndexBuffer(size_t size, bool dynamic) {
     GrGLIndexBuffer::Desc desc;
     desc.fDynamic = dynamic;
     desc.fSizeInBytes = size;
     desc.fIsWrapped = false;
     if (this->glCaps().useNonVBOVertexAndIndexDynamicData() && desc.fDynamic) {
         desc.fID = 0;
         GrIndexBuffer* indexBuffer = SkNEW_ARGS(GrGLIndexBuffer, (this, desc));
         return indexBuffer;
     } else {
         GL_CALL(GenBuffers(1, &desc.fID));
         if (desc.fID) {
             fHWGeometryState.setIndexBufferIDOnDefaultVertexArray(this, desc.fID);
             CLEAR_ERROR_BEFORE_ALLOC(this->glInterface());
             // make sure driver can allocate memory for this buffer
             GL_ALLOC_CALL(this->glInterface(),
                           BufferData(GR_GL_ELEMENT_ARRAY_BUFFER,
                                      (GrGLsizeiptr) desc.fSizeInBytes,
                                      NULL,  // data ptr
                                      desc.fDynamic ? GR_GL_DYNAMIC_DRAW : GR_GL_STATIC_DRAW));
             if (CHECK_ALLOC_ERROR(this->glInterface()) != GR_GL_NO_ERROR) {
                 GL_CALL(DeleteBuffers(1, &desc.fID));
                 this->notifyIndexBufferDelete(desc.fID);
                 return NULL;
             }
             GrIndexBuffer* indexBuffer = SkNEW_ARGS(GrGLIndexBuffer, (this, desc));
             return indexBuffer;
         }
         return NULL;
     }
 }
 GrPath* GrGpuGL::onCreatePath(const SkPath& inPath, const SkStrokeRec& stroke) {
     SkASSERT(this->caps()->pathRenderingSupport());
     return SkNEW_ARGS(GrGLPath, (this, inPath, stroke));
 }
 void GrGpuGL::flushScissor() {
     if (fScissorState.fEnabled) {
         // Only access the RT if scissoring is being enabled. We can call this before performing
         // a glBitframebuffer for a surface->surface copy, which requires no RT to be bound to the
         // GrDrawState.
         const GrDrawState& drawState = this->getDrawState();
         const GrGLRenderTarget* rt =
             static_cast<const GrGLRenderTarget*>(drawState.getRenderTarget());
         SkASSERT(NULL != rt);
         const GrGLIRect& vp = rt->getViewport();
         GrGLIRect scissor;
         scissor.setRelativeTo(vp,
                               fScissorState.fRect.fLeft,
                               fScissorState.fRect.fTop,
                               fScissorState.fRect.width(),
                               fScissorState.fRect.height(),
                               rt->origin());
         // if the scissor fully contains the viewport then we fall through and
         // disable the scissor test.
         if (!scissor.contains(vp)) {
             if (fHWScissorSettings.fRect != scissor) {
                 scissor.pushToGLScissor(this->glInterface());
                 fHWScissorSettings.fRect = scissor;
             }
             if (kYes_TriState != fHWScissorSettings.fEnabled) {
                 GL_CALL(Enable(GR_GL_SCISSOR_TEST));
                 fHWScissorSettings.fEnabled = kYes_TriState;
             }
             return;
         }
     }
     if (kNo_TriState != fHWScissorSettings.fEnabled) {
         GL_CALL(Disable(GR_GL_SCISSOR_TEST));
         fHWScissorSettings.fEnabled = kNo_TriState;
         return;
     }
 }
 void GrGpuGL::onClear(const SkIRect* rect, GrColor color, bool canIgnoreRect) {
     const GrDrawState& drawState = this->getDrawState();
     const GrRenderTarget* rt = drawState.getRenderTarget();
     // parent class should never let us get here with no RT
     SkASSERT(NULL != rt);
     if (canIgnoreRect && this->glCaps().fullClearIsFree()) {
         rect = NULL;
     }
     SkIRect clippedRect;
     if (NULL != rect) {
         // flushScissor expects rect to be clipped to the target.
         clippedRect = *rect;
         SkIRect rtRect = SkIRect::MakeWH(rt->width(), rt->height());
         if (clippedRect.intersect(rtRect)) {
             rect = &clippedRect;
         } else {
             return;
         }
     }
     this->flushRenderTarget(rect);
     GrAutoTRestore<ScissorState> asr(&fScissorState);
     fScissorState.fEnabled = (NULL != rect);
     if (fScissorState.fEnabled) {
         fScissorState.fRect = *rect;
     }
     this->flushScissor();
     GrGLfloat r, g, b, a;
     static const GrGLfloat scale255 = 1.f / 255.f;
     a = GrColorUnpackA(color) * scale255;
     GrGLfloat scaleRGB = scale255;
     r = GrColorUnpackR(color) * scaleRGB;
     g = GrColorUnpackG(color) * scaleRGB;
     b = GrColorUnpackB(color) * scaleRGB;
     GL_CALL(ColorMask(GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE));
     fHWWriteToColor = kYes_TriState;
     GL_CALL(ClearColor(r, g, b, a));
     GL_CALL(Clear(GR_GL_COLOR_BUFFER_BIT));
 }
 void GrGpuGL::clearStencil() {
     if (NULL == this->getDrawState().getRenderTarget()) {
         return;
     }
     this->flushRenderTarget(&SkIRect::EmptyIRect());
     GrAutoTRestore<ScissorState> asr(&fScissorState);
     fScissorState.fEnabled = false;
     this->flushScissor();
     GL_CALL(StencilMask(0xffffffff));
     GL_CALL(ClearStencil(0));
     GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
     fHWStencilSettings.invalidate();
 }
 void GrGpuGL::clearStencilClip(const SkIRect& rect, bool insideClip) {
     const GrDrawState& drawState = this->getDrawState();
     const GrRenderTarget* rt = drawState.getRenderTarget();
     SkASSERT(NULL != rt);
     // this should only be called internally when we know we have a
     // stencil buffer.
     SkASSERT(NULL != rt->getStencilBuffer());
     GrGLint stencilBitCount =  rt->getStencilBuffer()->bits();
 #if 0
     SkASSERT(stencilBitCount > 0);
     GrGLint clipStencilMask  = (1 << (stencilBitCount - 1));
 #else
     // we could just clear the clip bit but when we go through
     // ANGLE a partial stencil mask will cause clears to be
     // turned into draws. Our contract on GrDrawTarget says that
     // changing the clip between stencil passes may or may not
     // zero the client's clip bits. So we just clear the whole thing.
     static const GrGLint clipStencilMask  = ~0;
 #endif
     GrGLint value;
     if (insideClip) {
         value = (1 << (stencilBitCount - 1));
     } else {
         value = 0;
     }
     this->flushRenderTarget(&SkIRect::EmptyIRect());
     GrAutoTRestore<ScissorState> asr(&fScissorState);
     fScissorState.fEnabled = true;
     fScissorState.fRect = rect;
     this->flushScissor();
     GL_CALL(StencilMask((uint32_t) clipStencilMask));
     GL_CALL(ClearStencil(value));
     GL_CALL(Clear(GR_GL_STENCIL_BUFFER_BIT));
     fHWStencilSettings.invalidate();
 }
 void GrGpuGL::onForceRenderTargetFlush() {
     this->flushRenderTarget(&SkIRect::EmptyIRect());
 }
 bool GrGpuGL::readPixelsWillPayForYFlip(GrRenderTarget* renderTarget,
                                         int left, int top,
                                         int width, int height,
                                         GrPixelConfig config,
                                         size_t rowBytes) const {
     // If this rendertarget is aready TopLeft, we don't need to flip.
     if (kTopLeft_GrSurfaceOrigin == renderTarget->origin()) {
         return false;
     }
     // if GL can do the flip then we'll never pay for it.
     if (this->glCaps().packFlipYSupport()) {
         return false;
     }
     // If we have to do memcpy to handle non-trim rowBytes then we
     // get the flip for free. Otherwise it costs.
     if (this->glCaps().packRowLengthSupport()) {
         return true;
     }
     // If we have to do memcpys to handle rowBytes then y-flip is free
     // Note the rowBytes might be tight to the passed in data, but if data
     // gets clipped in x to the target the rowBytes will no longer be tight.
     if (left >= 0 && (left + width) < renderTarget->width()) {
            return 0 == rowBytes ||
                   GrBytesPerPixel(config) * width == rowBytes;
     } else {
         return false;
     }
 }
 bool GrGpuGL::onReadPixels(GrRenderTarget* target,
                            int left, int top,
                            int width, int height,
                            GrPixelConfig config,
                            void* buffer,
                            size_t rowBytes) {
     GrGLenum format;
     GrGLenum type;
     bool flipY = kBottomLeft_GrSurfaceOrigin == target->origin();
     if (!this->configToGLFormats(config, false, NULL, &format, &type)) {
         return false;
     }
     size_t bpp = GrBytesPerPixel(config);
     if (!adjust_pixel_ops_params(target->width(), target->height(), bpp,
                                  &left, &top, &width, &height,
                                  const_cast<const void**>(&buffer),
                                  &rowBytes)) {
         return false;
     }
     // resolve the render target if necessary
     GrGLRenderTarget* tgt = static_cast<GrGLRenderTarget*>(target);
     GrDrawState::AutoRenderTargetRestore artr;
     switch (tgt->getResolveType()) {
         case GrGLRenderTarget::kCantResolve_ResolveType:
             return false;
         case GrGLRenderTarget::kAutoResolves_ResolveType:
             artr.set(this->drawState(), target);
             this->flushRenderTarget(&SkIRect::EmptyIRect());
             break;
         case GrGLRenderTarget::kCanResolve_ResolveType:
             this->onResolveRenderTarget(tgt);
             // we don't track the state of the READ FBO ID.
             GL_CALL(BindFramebuffer(GR_GL_READ_FRAMEBUFFER,
                                     tgt->textureFBOID()));
             break;
         default:
             GrCrash("Unknown resolve type");
     }
     const GrGLIRect& glvp = tgt->getViewport();
     // the read rect is viewport-relative
     GrGLIRect readRect;
     readRect.setRelativeTo(glvp, left, top, width, height, target->origin());
     size_t tightRowBytes = bpp * width;
     if (0 == rowBytes) {
         rowBytes = tightRowBytes;
     }
     size_t readDstRowBytes = tightRowBytes;
     void* readDst = buffer;
     // determine if GL can read using the passed rowBytes or if we need
     // a scratch buffer.
     SkAutoSMalloc<32 * sizeof(GrColor)> scratch;
     if (rowBytes != tightRowBytes) {
         if (this->glCaps().packRowLengthSupport()) {
             SkASSERT(!(rowBytes % sizeof(GrColor)));
             GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH,
                                 static_cast<GrGLint>(rowBytes / sizeof(GrColor))));
             readDstRowBytes = rowBytes;
         } else {
             scratch.reset(tightRowBytes * height);
             readDst = scratch.get();
         }
     }
     if (flipY && this->glCaps().packFlipYSupport()) {
         GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, 1));
     }
     GL_CALL(ReadPixels(readRect.fLeft, readRect.fBottom,
                        readRect.fWidth, readRect.fHeight,
                        format, type, readDst));
     if (readDstRowBytes != tightRowBytes) {
         SkASSERT(this->glCaps().packRowLengthSupport());
         GL_CALL(PixelStorei(GR_GL_PACK_ROW_LENGTH, 0));
     }
     if (flipY && this->glCaps().packFlipYSupport()) {
         GL_CALL(PixelStorei(GR_GL_PACK_REVERSE_ROW_ORDER, 0));
         flipY = false;
     }
     // now reverse the order of the rows, since GL's are bottom-to-top, but our
     // API presents top-to-bottom. We must preserve the padding contents. Note
     // that the above readPixels did not overwrite the padding.
     if (readDst == buffer) {
         SkASSERT(rowBytes == readDstRowBytes);
         if (flipY) {
             scratch.reset(tightRowBytes);
             void* tmpRow = scratch.get();
             // flip y in-place by rows
             const int halfY = height >> 1;
             char* top = reinterpret_cast<char*>(buffer);
             char* bottom = top + (height - 1) * rowBytes;
             for (int y = 0; y < halfY; y++) {
                 memcpy(tmpRow, top, tightRowBytes);
                 memcpy(top, bottom, tightRowBytes);
                 memcpy(bottom, tmpRow, tightRowBytes);
                 top += rowBytes;
                 bottom -= rowBytes;
             }
         }
     } else {
         SkASSERT(readDst != buffer);        SkASSERT(rowBytes != tightRowBytes);
         // copy from readDst to buffer while flipping y
         // const int halfY = height >> 1;
         const char* src = reinterpret_cast<const char*>(readDst);
         char* dst = reinterpret_cast<char*>(buffer);
         if (flipY) {
             dst += (height-1) * rowBytes;
         }
         for (int y = 0; y < height; y++) {
             memcpy(dst, src, tightRowBytes);
             src += readDstRowBytes;
             if (!flipY) {
                 dst += rowBytes;
             } else {
                 dst -= rowBytes;
             }
         }
     }
     return true;
 }
 void GrGpuGL::flushRenderTarget(const SkIRect* bound) {
     GrGLRenderTarget* rt =
         static_cast<GrGLRenderTarget*>(this->drawState()->getRenderTarget());
     SkASSERT(NULL != rt);
     if (fHWBoundRenderTarget != rt) {
         GL_CALL(BindFramebuffer(GR_GL_FRAMEBUFFER, rt->renderFBOID()));
 #ifdef SK_DEBUG
         // don't do this check in Chromium -- this is causing
         // lots of repeated command buffer flushes when the compositor is
         // rendering with Ganesh, which is really slow; even too slow for
         // Debug mode.
         if (!this->glContext().isChromium()) {
             GrGLenum status;
             GL_CALL_RET(status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
             if (status != GR_GL_FRAMEBUFFER_COMPLETE) {
                 GrPrintf("GrGpuGL::flushRenderTarget glCheckFramebufferStatus %x\n", status);
             }
         }
 #endif
         fHWBoundRenderTarget = rt;
         const GrGLIRect& vp = rt->getViewport();
         if (fHWViewport != vp) {
             vp.pushToGLViewport(this->glInterface());
             fHWViewport = vp;
         }
     }
     if (NULL == bound || !bound->isEmpty()) {
         rt->flagAsNeedingResolve(bound);
     }
     GrTexture *texture = rt->asTexture();
     if (texture) {
         texture->dirtyMipMaps(true);
     }
 }
 GrGLenum gPrimitiveType2GLMode[] = {
     GR_GL_TRIANGLES,
     GR_GL_TRIANGLE_STRIP,
     GR_GL_TRIANGLE_FAN,
     GR_GL_POINTS,
     GR_GL_LINES,
     GR_GL_LINE_STRIP
 };
 #define SWAP_PER_DRAW 0
 #if SWAP_PER_DRAW
     #if defined(SK_BUILD_FOR_MAC)
         #include <AGL/agl.h>
     #elif defined(SK_BUILD_FOR_WIN32)
         #include <gl/GL.h>
         void SwapBuf() {
             DWORD procID = GetCurrentProcessId();
             HWND hwnd = GetTopWindow(GetDesktopWindow());
             while(hwnd) {
                 DWORD wndProcID = 0;
                 GetWindowThreadProcessId(hwnd, &wndProcID);
                 if(wndProcID == procID) {
                     SwapBuffers(GetDC(hwnd));
                 }
                 hwnd = GetNextWindow(hwnd, GW_HWNDNEXT);
             }
          }
     #endif
 #endif
 void GrGpuGL::onGpuDraw(const DrawInfo& info) {
     size_t indexOffsetInBytes;
     this->setupGeometry(info, &indexOffsetInBytes);
     SkASSERT((size_t)info.primitiveType() < GR_ARRAY_COUNT(gPrimitiveType2GLMode));
     if (info.isIndexed()) {
         GrGLvoid* indices =
             reinterpret_cast<GrGLvoid*>(indexOffsetInBytes + sizeof(uint16_t) * info.startIndex());
         // info.startVertex() was accounted for by setupGeometry.
         GL_CALL(DrawElements(gPrimitiveType2GLMode[info.primitiveType()],
                              info.indexCount(),
                              GR_GL_UNSIGNED_SHORT,
                              indices));
     } else {
         // Pass 0 for parameter first. We have to adjust glVertexAttribPointer() to account for
         // startVertex in the DrawElements case. So we always rely on setupGeometry to have
         // accounted for startVertex.
         GL_CALL(DrawArrays(gPrimitiveType2GLMode[info.primitiveType()], 0, info.vertexCount()));
     }
 #if SWAP_PER_DRAW
     glFlush();
     #if defined(SK_BUILD_FOR_MAC)
         aglSwapBuffers(aglGetCurrentContext());
         int set_a_break_pt_here = 9;
         aglSwapBuffers(aglGetCurrentContext());
     #elif defined(SK_BUILD_FOR_WIN32)
         SwapBuf();
         int set_a_break_pt_here = 9;
         SwapBuf();
     #endif
 #endif
 }
 static GrGLenum gr_stencil_op_to_gl_path_rendering_fill_mode(GrStencilOp op) {
     switch (op) {
         default:
             GrCrash("Unexpected path fill.");
             /* fallthrough */;
         case kIncClamp_StencilOp:
             return GR_GL_COUNT_UP;
         case kInvert_StencilOp:
             return GR_GL_INVERT;
     }
 }
 void GrGpuGL::onGpuStencilPath(const GrPath* path, SkPath::FillType fill) {
     SkASSERT(this->caps()->pathRenderingSupport());
     GrGLuint id = static_cast<const GrGLPath*>(path)->pathID();
     SkASSERT(NULL != this->drawState()->getRenderTarget());
     SkASSERT(NULL != this->drawState()->getRenderTarget()->getStencilBuffer());
     flushPathStencilSettings(fill);
     // Decide how to manipulate the stencil buffer based on the fill rule.
     SkASSERT(!fHWPathStencilSettings.isTwoSided());
     GrGLenum fillMode =
         gr_stencil_op_to_gl_path_rendering_fill_mode(fHWPathStencilSettings.passOp(GrStencilSettings::kFront_Face));
     GrGLint writeMask = fHWPathStencilSettings.writeMask(GrStencilSettings::kFront_Face);
     GL_CALL(StencilFillPath(id, fillMode, writeMask));
 }
 void GrGpuGL::onGpuDrawPath(const GrPath* path, SkPath::FillType fill) {
     SkASSERT(this->caps()->pathRenderingSupport());
     GrGLuint id = static_cast<const GrGLPath*>(path)->pathID();
     SkASSERT(NULL != this->drawState()->getRenderTarget());
     SkASSERT(NULL != this->drawState()->getRenderTarget()->getStencilBuffer());
     SkASSERT(!fCurrentProgram->hasVertexShader());
     flushPathStencilSettings(fill);
     const SkStrokeRec& stroke = path->getStroke();
     SkPath::FillType nonInvertedFill = SkPath::ConvertToNonInverseFillType(fill);
     SkASSERT(!fHWPathStencilSettings.isTwoSided());
     GrGLenum fillMode =
         gr_stencil_op_to_gl_path_rendering_fill_mode(fHWPathStencilSettings.passOp(GrStencilSettings::kFront_Face));
     GrGLint writeMask = fHWPathStencilSettings.writeMask(GrStencilSettings::kFront_Face);
     if (stroke.isFillStyle() || SkStrokeRec::kStrokeAndFill_Style == stroke.getStyle()) {
         GL_CALL(StencilFillPath(id, fillMode, writeMask));
     }
     if (stroke.needToApply()) {
         GL_CALL(StencilStrokePath(id, 0xffff, writeMask));
     }
     if (nonInvertedFill == fill) {
         if (stroke.needToApply()) {
             GL_CALL(CoverStrokePath(id, GR_GL_BOUNDING_BOX));
         } else {
             GL_CALL(CoverFillPath(id, GR_GL_BOUNDING_BOX));
         }
     } else {
         GrDrawState* drawState = this->drawState();
         GrDrawState::AutoViewMatrixRestore avmr;
         SkRect bounds = SkRect::MakeLTRB(0, 0,
                                          SkIntToScalar(drawState->getRenderTarget()->width()),
                                          SkIntToScalar(drawState->getRenderTarget()->height()));
         SkMatrix vmi;
         // mapRect through persp matrix may not be correct
         if (!drawState->getViewMatrix().hasPerspective() && drawState->getViewInverse(&vmi)) {
             vmi.mapRect(&bounds);
             // theoretically could set bloat = 0, instead leave it because of matrix inversion
             // precision.
             SkScalar bloat = drawState->getViewMatrix().getMaxStretch() * SK_ScalarHalf;
             bounds.outset(bloat, bloat);
         } else {
             avmr.setIdentity(drawState);
         }
         this->drawSimpleRect(bounds, NULL);
     }
 }
 void GrGpuGL::onResolveRenderTarget(GrRenderTarget* target) {
     GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(target);
     if (rt->needsResolve()) {
         // Some extensions automatically resolves the texture when it is read.
         if (this->glCaps().usesMSAARenderBuffers()) {
             SkASSERT(rt->textureFBOID() != rt->renderFBOID());
             GL_CALL(BindFramebuffer(GR_GL_READ_FRAMEBUFFER, rt->renderFBOID()));
             GL_CALL(BindFramebuffer(GR_GL_DRAW_FRAMEBUFFER, rt->textureFBOID()));
             // make sure we go through flushRenderTarget() since we've modified
             // the bound DRAW FBO ID.
             fHWBoundRenderTarget = NULL;
             const GrGLIRect& vp = rt->getViewport();
             const SkIRect dirtyRect = rt->getResolveRect();
             GrGLIRect r;
             r.setRelativeTo(vp, dirtyRect.fLeft, dirtyRect.fTop,
                             dirtyRect.width(), dirtyRect.height(), target->origin());
             GrAutoTRestore<ScissorState> asr;
             if (GrGLCaps::kES_Apple_MSFBOType == this->glCaps().msFBOType()) {
                 // Apple's extension uses the scissor as the blit bounds.
                 asr.reset(&fScissorState);
                 fScissorState.fEnabled = true;
                 fScissorState.fRect = dirtyRect;
                 this->flushScissor();
                 GL_CALL(ResolveMultisampleFramebuffer());
             } else {
                 if (GrGLCaps::kDesktop_EXT_MSFBOType == this->glCaps().msFBOType()) {
                     // this respects the scissor during the blit, so disable it.
                     asr.reset(&fScissorState);
                     fScissorState.fEnabled = false;
                     this->flushScissor();
                 }
                 int right = r.fLeft + r.fWidth;
                 int top = r.fBottom + r.fHeight;
                 GL_CALL(BlitFramebuffer(r.fLeft, r.fBottom, right, top,
                                         r.fLeft, r.fBottom, right, top,
                                         GR_GL_COLOR_BUFFER_BIT, GR_GL_NEAREST));
             }
         }
         rt->flagAsResolved();
     }
 }
 namespace {
 GrGLenum gr_to_gl_stencil_func(GrStencilFunc basicFunc) {
     static const GrGLenum gTable[] = {
         GR_GL_ALWAYS,           // kAlways_StencilFunc
         GR_GL_NEVER,            // kNever_StencilFunc
         GR_GL_GREATER,          // kGreater_StencilFunc
         GR_GL_GEQUAL,           // kGEqual_StencilFunc
         GR_GL_LESS,             // kLess_StencilFunc
         GR_GL_LEQUAL,           // kLEqual_StencilFunc,
         GR_GL_EQUAL,            // kEqual_StencilFunc,
         GR_GL_NOTEQUAL,         // kNotEqual_StencilFunc,
     };
     GR_STATIC_ASSERT(GR_ARRAY_COUNT(gTable) == kBasicStencilFuncCount);
     GR_STATIC_ASSERT(0 == kAlways_StencilFunc);
     GR_STATIC_ASSERT(1 == kNever_StencilFunc);
     GR_STATIC_ASSERT(2 == kGreater_StencilFunc);
     GR_STATIC_ASSERT(3 == kGEqual_StencilFunc);
     GR_STATIC_ASSERT(4 == kLess_StencilFunc);
     GR_STATIC_ASSERT(5 == kLEqual_StencilFunc);
     GR_STATIC_ASSERT(6 == kEqual_StencilFunc);
     GR_STATIC_ASSERT(7 == kNotEqual_StencilFunc);
     SkASSERT((unsigned) basicFunc < kBasicStencilFuncCount);
     return gTable[basicFunc];
 }
 GrGLenum gr_to_gl_stencil_op(GrStencilOp op) {
     static const GrGLenum gTable[] = {
         GR_GL_KEEP,        // kKeep_StencilOp
         GR_GL_REPLACE,     // kReplace_StencilOp
         GR_GL_INCR_WRAP,   // kIncWrap_StencilOp
         GR_GL_INCR,        // kIncClamp_StencilOp
         GR_GL_DECR_WRAP,   // kDecWrap_StencilOp
         GR_GL_DECR,        // kDecClamp_StencilOp
         GR_GL_ZERO,        // kZero_StencilOp
         GR_GL_INVERT,      // kInvert_StencilOp
     };
     GR_STATIC_ASSERT(GR_ARRAY_COUNT(gTable) == kStencilOpCount);
     GR_STATIC_ASSERT(0 == kKeep_StencilOp);
     GR_STATIC_ASSERT(1 == kReplace_StencilOp);
     GR_STATIC_ASSERT(2 == kIncWrap_StencilOp);
     GR_STATIC_ASSERT(3 == kIncClamp_StencilOp);
     GR_STATIC_ASSERT(4 == kDecWrap_StencilOp);
     GR_STATIC_ASSERT(5 == kDecClamp_StencilOp);
     GR_STATIC_ASSERT(6 == kZero_StencilOp);
     GR_STATIC_ASSERT(7 == kInvert_StencilOp);
     SkASSERT((unsigned) op < kStencilOpCount);
     return gTable[op];
 }
 void set_gl_stencil(const GrGLInterface* gl,
                     const GrStencilSettings& settings,
                     GrGLenum glFace,
                     GrStencilSettings::Face grFace) {
     GrGLenum glFunc = gr_to_gl_stencil_func(settings.func(grFace));
     GrGLenum glFailOp = gr_to_gl_stencil_op(settings.failOp(grFace));
     GrGLenum glPassOp = gr_to_gl_stencil_op(settings.passOp(grFace));
     GrGLint ref = settings.funcRef(grFace);
     GrGLint mask = settings.funcMask(grFace);
     GrGLint writeMask = settings.writeMask(grFace);
     if (GR_GL_FRONT_AND_BACK == glFace) {
         // we call the combined func just in case separate stencil is not
         // supported.
         GR_GL_CALL(gl, StencilFunc(glFunc, ref, mask));
         GR_GL_CALL(gl, StencilMask(writeMask));
         GR_GL_CALL(gl, StencilOp(glFailOp, glPassOp, glPassOp));
     } else {
         GR_GL_CALL(gl, StencilFuncSeparate(glFace, glFunc, ref, mask));
         GR_GL_CALL(gl, StencilMaskSeparate(glFace, writeMask));
         GR_GL_CALL(gl, StencilOpSeparate(glFace, glFailOp, glPassOp, glPassOp));
     }
 }
 }
 void GrGpuGL::flushStencil(DrawType type) {
     if (kStencilPath_DrawType != type && fHWStencilSettings != fStencilSettings) {
         if (fStencilSettings.isDisabled()) {
             if (kNo_TriState != fHWStencilTestEnabled) {
                 GL_CALL(Disable(GR_GL_STENCIL_TEST));
                 fHWStencilTestEnabled = kNo_TriState;
             }
         } else {
             if (kYes_TriState != fHWStencilTestEnabled) {
                 GL_CALL(Enable(GR_GL_STENCIL_TEST));
                 fHWStencilTestEnabled = kYes_TriState;
             }
         }
         if (!fStencilSettings.isDisabled()) {
             if (this->caps()->twoSidedStencilSupport()) {
                 set_gl_stencil(this->glInterface(),
                                fStencilSettings,
                                GR_GL_FRONT,
                                GrStencilSettings::kFront_Face);
                 set_gl_stencil(this->glInterface(),
                                fStencilSettings,
                                GR_GL_BACK,
                                GrStencilSettings::kBack_Face);
             } else {
                 set_gl_stencil(this->glInterface(),
                                fStencilSettings,
                                GR_GL_FRONT_AND_BACK,
                                GrStencilSettings::kFront_Face);
             }
         }
         fHWStencilSettings = fStencilSettings;
     }
 }
 void GrGpuGL::flushAAState(DrawType type) {
 // At least some ATI linux drivers will render GL_LINES incorrectly when MSAA state is enabled but
 // the target is not multisampled. Single pixel wide lines are rendered thicker than 1 pixel wide.
 #if 0
     // Replace RT_HAS_MSAA with this definition once this driver bug is no longer a relevant concern
     #define RT_HAS_MSAA rt->isMultisampled()
 #else
     #define RT_HAS_MSAA (rt->isMultisampled() || kDrawLines_DrawType == type)
 #endif
     const GrRenderTarget* rt = this->getDrawState().getRenderTarget();
     if (kGL_GrGLStandard == this->glStandard()) {
         // ES doesn't support toggling GL_MULTISAMPLE and doesn't have
         // smooth lines.
         // we prefer smooth lines over multisampled lines
         bool smoothLines = false;
         if (kDrawLines_DrawType == type) {
             smoothLines = this->willUseHWAALines();
             if (smoothLines) {
                 if (kYes_TriState != fHWAAState.fSmoothLineEnabled) {
                     GL_CALL(Enable(GR_GL_LINE_SMOOTH));
                     fHWAAState.fSmoothLineEnabled = kYes_TriState;
                     // must disable msaa to use line smoothing
                     if (RT_HAS_MSAA &&
                         kNo_TriState != fHWAAState.fMSAAEnabled) {
                         GL_CALL(Disable(GR_GL_MULTISAMPLE));
                         fHWAAState.fMSAAEnabled = kNo_TriState;
                     }
                 }
             } else {
                 if (kNo_TriState != fHWAAState.fSmoothLineEnabled) {
                     GL_CALL(Disable(GR_GL_LINE_SMOOTH));
                     fHWAAState.fSmoothLineEnabled = kNo_TriState;
                 }
             }
         }
         if (!smoothLines && RT_HAS_MSAA) {
             // FIXME: GL_NV_pr doesn't seem to like MSAA disabled. The paths
             // convex hulls of each segment appear to get filled.
             bool enableMSAA = kStencilPath_DrawType == type ||
                               this->getDrawState().isHWAntialiasState();
             if (enableMSAA) {
                 if (kYes_TriState != fHWAAState.fMSAAEnabled) {
                     GL_CALL(Enable(GR_GL_MULTISAMPLE));
                     fHWAAState.fMSAAEnabled = kYes_TriState;
                 }
             } else {
                 if (kNo_TriState != fHWAAState.fMSAAEnabled) {
                     GL_CALL(Disable(GR_GL_MULTISAMPLE));
                     fHWAAState.fMSAAEnabled = kNo_TriState;
                 }
             }
         }
     }
 }
 void GrGpuGL::flushPathStencilSettings(SkPath::FillType fill) {
     GrStencilSettings pathStencilSettings;
     this->getPathStencilSettingsForFillType(fill, &pathStencilSettings);
     if (fHWPathStencilSettings != pathStencilSettings) {
         // Just the func, ref, and mask is set here. The op and write mask are params to the call
         // that draws the path to the SB (glStencilFillPath)
         GrGLenum func =
             gr_to_gl_stencil_func(pathStencilSettings.func(GrStencilSettings::kFront_Face));
         GL_CALL(PathStencilFunc(func,
                                 pathStencilSettings.funcRef(GrStencilSettings::kFront_Face),
                                 pathStencilSettings.funcMask(GrStencilSettings::kFront_Face)));
         fHWPathStencilSettings = pathStencilSettings;
     }
 }
 void GrGpuGL::flushBlend(bool isLines,
                          GrBlendCoeff srcCoeff,
                          GrBlendCoeff dstCoeff) {
     if (isLines && this->willUseHWAALines()) {
         if (kYes_TriState != fHWBlendState.fEnabled) {
             GL_CALL(Enable(GR_GL_BLEND));
             fHWBlendState.fEnabled = kYes_TriState;
         }
         if (kSA_GrBlendCoeff != fHWBlendState.fSrcCoeff ||
             kISA_GrBlendCoeff != fHWBlendState.fDstCoeff) {
             GL_CALL(BlendFunc(gXfermodeCoeff2Blend[kSA_GrBlendCoeff],
                               gXfermodeCoeff2Blend[kISA_GrBlendCoeff]));
             fHWBlendState.fSrcCoeff = kSA_GrBlendCoeff;
             fHWBlendState.fDstCoeff = kISA_GrBlendCoeff;
         }
     } else {
         // any optimization to disable blending should
         // have already been applied and tweaked the coeffs
         // to (1, 0).
         bool blendOff = kOne_GrBlendCoeff == srcCoeff &&
                         kZero_GrBlendCoeff == dstCoeff;
         if (blendOff) {
             if (kNo_TriState != fHWBlendState.fEnabled) {
                 GL_CALL(Disable(GR_GL_BLEND));
                 fHWBlendState.fEnabled = kNo_TriState;
             }
         } else {
             if (kYes_TriState != fHWBlendState.fEnabled) {
                 GL_CALL(Enable(GR_GL_BLEND));
                 fHWBlendState.fEnabled = kYes_TriState;
             }
             if (fHWBlendState.fSrcCoeff != srcCoeff ||
                 fHWBlendState.fDstCoeff != dstCoeff) {
                 GL_CALL(BlendFunc(gXfermodeCoeff2Blend[srcCoeff],
                                   gXfermodeCoeff2Blend[dstCoeff]));
                 fHWBlendState.fSrcCoeff = srcCoeff;
                 fHWBlendState.fDstCoeff = dstCoeff;
             }
             GrColor blendConst = this->getDrawState().getBlendConstant();
             if ((BlendCoeffReferencesConstant(srcCoeff) ||
                  BlendCoeffReferencesConstant(dstCoeff)) &&
                 (!fHWBlendState.fConstColorValid ||
                  fHWBlendState.fConstColor != blendConst)) {
                 GrGLfloat c[4];
                 GrColorToRGBAFloat(blendConst, c);
                 GL_CALL(BlendColor(c[0], c[1], c[2], c[3]));
                 fHWBlendState.fConstColor = blendConst;
                 fHWBlendState.fConstColorValid = true;
             }
         }
     }
 }
 static inline GrGLenum tile_to_gl_wrap(SkShader::TileMode tm) {
     static const GrGLenum gWrapModes[] = {
         GR_GL_CLAMP_TO_EDGE,
         GR_GL_REPEAT,
         GR_GL_MIRRORED_REPEAT
     };
     GR_STATIC_ASSERT(SkShader::kTileModeCount == SK_ARRAY_COUNT(gWrapModes));
     GR_STATIC_ASSERT(0 == SkShader::kClamp_TileMode);
     GR_STATIC_ASSERT(1 == SkShader::kRepeat_TileMode);
     GR_STATIC_ASSERT(2 == SkShader::kMirror_TileMode);
     return gWrapModes[tm];
 }
 void GrGpuGL::bindTexture(int unitIdx, const GrTextureParams& params, GrGLTexture* texture) {
     SkASSERT(NULL != texture);
     // If we created a rt/tex and rendered to it without using a texture and now we're texturing
     // from the rt it will still be the last bound texture, but it needs resolving. So keep this
     // out of the "last != next" check.
     GrGLRenderTarget* texRT =  static_cast<GrGLRenderTarget*>(texture->asRenderTarget());
     if (NULL != texRT) {
         this->onResolveRenderTarget(texRT);
     }
     if (fHWBoundTextures[unitIdx] != texture) {
         this->setTextureUnit(unitIdx);
         GL_CALL(BindTexture(GR_GL_TEXTURE_2D, texture->textureID()));
         fHWBoundTextures[unitIdx] = texture;
     }
     ResetTimestamp timestamp;
     const GrGLTexture::TexParams& oldTexParams = texture->getCachedTexParams(&timestamp);
     bool setAll = timestamp < this->getResetTimestamp();
     GrGLTexture::TexParams newTexParams;
     static GrGLenum glMinFilterModes[] = {
         GR_GL_NEAREST,
         GR_GL_LINEAR,
         GR_GL_LINEAR_MIPMAP_LINEAR
     };
     static GrGLenum glMagFilterModes[] = {
         GR_GL_NEAREST,
         GR_GL_LINEAR,
         GR_GL_LINEAR
     };
     GrTextureParams::FilterMode filterMode = params.filterMode();
     if (!this->caps()->mipMapSupport() && GrTextureParams::kMipMap_FilterMode == filterMode) {
         filterMode = GrTextureParams::kBilerp_FilterMode;
     }
     newTexParams.fMinFilter = glMinFilterModes[filterMode];
     newTexParams.fMagFilter = glMagFilterModes[filterMode];
     if (GrTextureParams::kMipMap_FilterMode == filterMode && texture->mipMapsAreDirty()) {
 //        GL_CALL(Hint(GR_GL_GENERATE_MIPMAP_HINT,GR_GL_NICEST));
         GL_CALL(GenerateMipmap(GR_GL_TEXTURE_2D));
         texture->dirtyMipMaps(false);
     }
     newTexParams.fWrapS = tile_to_gl_wrap(params.getTileModeX());
     newTexParams.fWrapT = tile_to_gl_wrap(params.getTileModeY());
     memcpy(newTexParams.fSwizzleRGBA,
            GrGLShaderBuilder::GetTexParamSwizzle(texture->config(), this->glCaps()),
            sizeof(newTexParams.fSwizzleRGBA));
     if (setAll || newTexParams.fMagFilter != oldTexParams.fMagFilter) {
         this->setTextureUnit(unitIdx);
         GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                               GR_GL_TEXTURE_MAG_FILTER,
                               newTexParams.fMagFilter));
     }
     if (setAll || newTexParams.fMinFilter != oldTexParams.fMinFilter) {
         this->setTextureUnit(unitIdx);
         GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                               GR_GL_TEXTURE_MIN_FILTER,
                               newTexParams.fMinFilter));
     }
     if (setAll || newTexParams.fWrapS != oldTexParams.fWrapS) {
         this->setTextureUnit(unitIdx);
         GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                               GR_GL_TEXTURE_WRAP_S,
                               newTexParams.fWrapS));
     }
     if (setAll || newTexParams.fWrapT != oldTexParams.fWrapT) {
         this->setTextureUnit(unitIdx);
         GL_CALL(TexParameteri(GR_GL_TEXTURE_2D,
                               GR_GL_TEXTURE_WRAP_T,
                               newTexParams.fWrapT));
     }
     if (this->glCaps().textureSwizzleSupport() &&
         (setAll || memcmp(newTexParams.fSwizzleRGBA,
                           oldTexParams.fSwizzleRGBA,
                           sizeof(newTexParams.fSwizzleRGBA)))) {
         this->setTextureUnit(unitIdx);
         if (this->glStandard() == kGLES_GrGLStandard) {
             // ES3 added swizzle support but not GL_TEXTURE_SWIZZLE_RGBA.
             const GrGLenum* swizzle = newTexParams.fSwizzleRGBA;
             GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_R, swizzle[0]));
             GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_G, swizzle[1]));
             GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_B, swizzle[2]));
             GL_CALL(TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_A, swizzle[3]));
         } else {
             GR_STATIC_ASSERT(sizeof(newTexParams.fSwizzleRGBA[0]) == sizeof(GrGLint));
             const GrGLint* swizzle = reinterpret_cast<const GrGLint*>(newTexParams.fSwizzleRGBA);
             GL_CALL(TexParameteriv(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_SWIZZLE_RGBA, swizzle));
         }
     }
     texture->setCachedTexParams(newTexParams, this->getResetTimestamp());
 }
 void GrGpuGL::setProjectionMatrix(const SkMatrix& matrix,
                                   const SkISize& renderTargetSize,
                                   GrSurfaceOrigin renderTargetOrigin) {
     SkASSERT(this->glCaps().fixedFunctionSupport());
     if (renderTargetOrigin == fHWProjectionMatrixState.fRenderTargetOrigin &&
         renderTargetSize == fHWProjectionMatrixState.fRenderTargetSize &&
         matrix.cheapEqualTo(fHWProjectionMatrixState.fViewMatrix)) {
         return;
     }
     fHWProjectionMatrixState.fViewMatrix = matrix;
     fHWProjectionMatrixState.fRenderTargetSize = renderTargetSize;
     fHWProjectionMatrixState.fRenderTargetOrigin = renderTargetOrigin;
     GrGLfloat glMatrix[4 * 4];
     fHWProjectionMatrixState.getGLMatrix<4>(glMatrix);
     GL_CALL(MatrixMode(GR_GL_PROJECTION));
     GL_CALL(LoadMatrixf(glMatrix));
 }
 void GrGpuGL::enableTexGen(int unitIdx,
                            TexGenComponents components,
                            const GrGLfloat* coefficients) {
     SkASSERT(this->glCaps().fixedFunctionSupport());
     SkASSERT(components >= kS_TexGenComponents && components <= kSTR_TexGenComponents);
     SkASSERT(this->glCaps().maxFixedFunctionTextureCoords() >= unitIdx);
     if (GR_GL_OBJECT_LINEAR == fHWTexGenSettings[unitIdx].fMode &&
         components == fHWTexGenSettings[unitIdx].fNumComponents &&
         !memcmp(coefficients, fHWTexGenSettings[unitIdx].fCoefficients,
 * components * sizeof(GrGLfloat))) {
         return;
     }
     this->setTextureUnit(unitIdx);
     if (GR_GL_OBJECT_LINEAR != fHWTexGenSettings[unitIdx].fMode) {
         for (int i = 0; i < 4; i++) {
             GL_CALL(TexGeni(GR_GL_S + i, GR_GL_TEXTURE_GEN_MODE, GR_GL_OBJECT_LINEAR));
         }
         fHWTexGenSettings[unitIdx].fMode = GR_GL_OBJECT_LINEAR;
     }
     for (int i = fHWTexGenSettings[unitIdx].fNumComponents; i < components; i++) {
         GL_CALL(Enable(GR_GL_TEXTURE_GEN_S + i));
     }
     for (int i = components; i < fHWTexGenSettings[unitIdx].fNumComponents; i++) {
         GL_CALL(Disable(GR_GL_TEXTURE_GEN_S + i));
     }
     fHWTexGenSettings[unitIdx].fNumComponents = components;
     for (int i = 0; i < components; i++) {
         GrGLfloat plane[] = {coefficients[0 + 3 * i],
                              coefficients[1 + 3 * i],
 ,
                              coefficients[2 + 3 * i]};
         GL_CALL(TexGenfv(GR_GL_S + i, GR_GL_OBJECT_PLANE, plane));
     }
     if (this->caps()->pathRenderingSupport()) {
         GL_CALL(PathTexGen(GR_GL_TEXTURE0 + unitIdx,
                            GR_GL_OBJECT_LINEAR,
                            components,
                            coefficients));
     }
     memcpy(fHWTexGenSettings[unitIdx].fCoefficients, coefficients,
 * components * sizeof(GrGLfloat));
 }
 void GrGpuGL::enableTexGen(int unitIdx, TexGenComponents components, const SkMatrix& matrix) {
     GrGLfloat coefficients[3 * 3];
     SkASSERT(this->glCaps().fixedFunctionSupport());
     SkASSERT(components >= kS_TexGenComponents && components <= kSTR_TexGenComponents);
     coefficients[0] = SkScalarToFloat(matrix[SkMatrix::kMScaleX]);
     coefficients[1] = SkScalarToFloat(matrix[SkMatrix::kMSkewX]);
     coefficients[2] = SkScalarToFloat(matrix[SkMatrix::kMTransX]);
     if (components >= kST_TexGenComponents) {
         coefficients[3] = SkScalarToFloat(matrix[SkMatrix::kMSkewY]);
         coefficients[4] = SkScalarToFloat(matrix[SkMatrix::kMScaleY]);
         coefficients[5] = SkScalarToFloat(matrix[SkMatrix::kMTransY]);
     }
     if (components >= kSTR_TexGenComponents) {
         coefficients[6] = SkScalarToFloat(matrix[SkMatrix::kMPersp0]);
         coefficients[7] = SkScalarToFloat(matrix[SkMatrix::kMPersp1]);
         coefficients[8] = SkScalarToFloat(matrix[SkMatrix::kMPersp2]);
     }
     enableTexGen(unitIdx, components, coefficients);
 }
 void GrGpuGL::flushTexGenSettings(int numUsedTexCoordSets) {
     SkASSERT(this->glCaps().fixedFunctionSupport());
     SkASSERT(this->glCaps().maxFixedFunctionTextureCoords() >= numUsedTexCoordSets);
     // Only write the inactive tex gens, since active tex gens were written
     // when they were enabled.
     SkDEBUGCODE(
         for (int i = 0; i < numUsedTexCoordSets; i++) {
             SkASSERT(0 != fHWTexGenSettings[i].fNumComponents);
         }
     );
     for (int i = numUsedTexCoordSets; i < fHWActiveTexGenSets; i++) {
         SkASSERT(0 != fHWTexGenSettings[i].fNumComponents);
         this->setTextureUnit(i);
         for (int j = 0; j < fHWTexGenSettings[i].fNumComponents; j++) {
             GL_CALL(Disable(GR_GL_TEXTURE_GEN_S + j));
         }
         if (this->caps()->pathRenderingSupport()) {
             GL_CALL(PathTexGen(GR_GL_TEXTURE0 + i, GR_GL_NONE, 0, NULL));
         }
         fHWTexGenSettings[i].fNumComponents = 0;
     }
     fHWActiveTexGenSets = numUsedTexCoordSets;
 }
 void GrGpuGL::flushMiscFixedFunctionState() {
     const GrDrawState& drawState = this->getDrawState();
     if (drawState.isDitherState()) {
         if (kYes_TriState != fHWDitherEnabled) {
             GL_CALL(Enable(GR_GL_DITHER));
             fHWDitherEnabled = kYes_TriState;
         }
     } else {
         if (kNo_TriState != fHWDitherEnabled) {
             GL_CALL(Disable(GR_GL_DITHER));
             fHWDitherEnabled = kNo_TriState;
         }
     }
     if (drawState.isColorWriteDisabled()) {
         if (kNo_TriState != fHWWriteToColor) {
             GL_CALL(ColorMask(GR_GL_FALSE, GR_GL_FALSE,
                               GR_GL_FALSE, GR_GL_FALSE));
             fHWWriteToColor = kNo_TriState;
         }
     } else {
         if (kYes_TriState != fHWWriteToColor) {
             GL_CALL(ColorMask(GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE, GR_GL_TRUE));
             fHWWriteToColor = kYes_TriState;
         }
     }
     if (fHWDrawFace != drawState.getDrawFace()) {
         switch (this->getDrawState().getDrawFace()) {
             case GrDrawState::kCCW_DrawFace:
                 GL_CALL(Enable(GR_GL_CULL_FACE));
                 GL_CALL(CullFace(GR_GL_BACK));
                 break;
             case GrDrawState::kCW_DrawFace:
                 GL_CALL(Enable(GR_GL_CULL_FACE));
                 GL_CALL(CullFace(GR_GL_FRONT));
                 break;
             case GrDrawState::kBoth_DrawFace:
                 GL_CALL(Disable(GR_GL_CULL_FACE));
                 break;
             default:
                 GrCrash("Unknown draw face.");
         }
         fHWDrawFace = drawState.getDrawFace();
     }
 }
 void GrGpuGL::notifyRenderTargetDelete(GrRenderTarget* renderTarget) {
     SkASSERT(NULL != renderTarget);
     if (fHWBoundRenderTarget == renderTarget) {
         fHWBoundRenderTarget = NULL;
     }
 }
 void GrGpuGL::notifyTextureDelete(GrGLTexture* texture) {
     for (int s = 0; s < fHWBoundTextures.count(); ++s) {
         if (fHWBoundTextures[s] == texture) {
             // deleting bound texture does implied bind to 0
             fHWBoundTextures[s] = NULL;
        }
     }
 }
 bool GrGpuGL::configToGLFormats(GrPixelConfig config,
                                 bool getSizedInternalFormat,
                                 GrGLenum* internalFormat,
                                 GrGLenum* externalFormat,
                                 GrGLenum* externalType) {
     GrGLenum dontCare;
     if (NULL == internalFormat) {
         internalFormat = &dontCare;
     }
     if (NULL == externalFormat) {
         externalFormat = &dontCare;
     }
     if (NULL == externalType) {
         externalType = &dontCare;
     }
     switch (config) {
         case kRGBA_8888_GrPixelConfig:
             *internalFormat = GR_GL_RGBA;
             *externalFormat = GR_GL_RGBA;
             if (getSizedInternalFormat) {
                 *internalFormat = GR_GL_RGBA8;
             } else {
                 *internalFormat = GR_GL_RGBA;
             }
             *externalType = GR_GL_UNSIGNED_BYTE;
             break;
         case kBGRA_8888_GrPixelConfig:
             if (!this->glCaps().bgraFormatSupport()) {
                 return false;
             }
             if (this->glCaps().bgraIsInternalFormat()) {
                 if (getSizedInternalFormat) {
                     *internalFormat = GR_GL_BGRA8;
                 } else {
                     *internalFormat = GR_GL_BGRA;
                 }
             } else {
                 if (getSizedInternalFormat) {
                     *internalFormat = GR_GL_RGBA8;
                 } else {
                     *internalFormat = GR_GL_RGBA;
                 }
             }
             *externalFormat = GR_GL_BGRA;
             *externalType = GR_GL_UNSIGNED_BYTE;
             break;
         case kRGB_565_GrPixelConfig:
             *internalFormat = GR_GL_RGB;
             *externalFormat = GR_GL_RGB;
             if (getSizedInternalFormat) {
                 if (this->glStandard() == kGL_GrGLStandard) {
                     return false;
                 } else {
                     *internalFormat = GR_GL_RGB565;
                 }
             } else {
                 *internalFormat = GR_GL_RGB;
             }
             *externalType = GR_GL_UNSIGNED_SHORT_5_6_5;
             break;
         case kRGBA_4444_GrPixelConfig:
             *internalFormat = GR_GL_RGBA;
             *externalFormat = GR_GL_RGBA;
             if (getSizedInternalFormat) {
                 *internalFormat = GR_GL_RGBA4;
             } else {
                 *internalFormat = GR_GL_RGBA;
             }
             *externalType = GR_GL_UNSIGNED_SHORT_4_4_4_4;
             break;
         case kIndex_8_GrPixelConfig:
             if (this->caps()->eightBitPaletteSupport()) {
                 *internalFormat = GR_GL_PALETTE8_RGBA8;
                 // glCompressedTexImage doesn't take external params
                 *externalFormat = GR_GL_PALETTE8_RGBA8;
                 // no sized/unsized internal format distinction here
                 *internalFormat = GR_GL_PALETTE8_RGBA8;
                 // unused with CompressedTexImage
                 *externalType = GR_GL_UNSIGNED_BYTE;
             } else {
                 return false;
             }
             break;
         case kAlpha_8_GrPixelConfig:
             if (this->glCaps().textureRedSupport()) {
                 *internalFormat = GR_GL_RED;
                 *externalFormat = GR_GL_RED;
                 if (getSizedInternalFormat) {
                     *internalFormat = GR_GL_R8;
                 } else {
                     *internalFormat = GR_GL_RED;
                 }
                 *externalType = GR_GL_UNSIGNED_BYTE;
             } else {
                 *internalFormat = GR_GL_ALPHA;
                 *externalFormat = GR_GL_ALPHA;
                 if (getSizedInternalFormat) {
                     *internalFormat = GR_GL_ALPHA8;
                 } else {
                     *internalFormat = GR_GL_ALPHA;
                 }
                 *externalType = GR_GL_UNSIGNED_BYTE;
             }
             break;
         default:
             return false;
     }
     return true;
 }
 void GrGpuGL::setTextureUnit(int unit) {
     SkASSERT(unit >= 0 && unit < fHWBoundTextures.count());
     if (unit != fHWActiveTextureUnitIdx) {
         GL_CALL(ActiveTexture(GR_GL_TEXTURE0 + unit));
         fHWActiveTextureUnitIdx = unit;
     }
 }
 void GrGpuGL::setScratchTextureUnit() {
     // Bind the last texture unit since it is the least likely to be used by GrGLProgram.
     int lastUnitIdx = fHWBoundTextures.count() - 1;
     if (lastUnitIdx != fHWActiveTextureUnitIdx) {
         GL_CALL(ActiveTexture(GR_GL_TEXTURE0 + lastUnitIdx));
         fHWActiveTextureUnitIdx = lastUnitIdx;
     }
     // clear out the this field so that if a program does use this unit it will rebind the correct
     // texture.
     fHWBoundTextures[lastUnitIdx] = NULL;
 }
 namespace {
 // Determines whether glBlitFramebuffer could be used between src and dst.
 inline bool can_blit_framebuffer(const GrSurface* dst,
                                  const GrSurface* src,
                                  const GrGpuGL* gpu,
                                  bool* wouldNeedTempFBO = NULL) {
     if (gpu->glCaps().isConfigRenderable(dst->config(), dst->desc().fSampleCnt > 0) &&
         gpu->glCaps().isConfigRenderable(src->config(), src->desc().fSampleCnt > 0) &&
         gpu->glCaps().usesMSAARenderBuffers()) {
         // ES3 doesn't allow framebuffer blits when the src has MSAA and the configs don't match
         // or the rects are not the same (not just the same size but have the same edges).
         if (GrGLCaps::kES_3_0_MSFBOType == gpu->glCaps().msFBOType() &&
             (src->desc().fSampleCnt > 0 || src->config() != dst->config())) {
            return false;
         }
         if (NULL != wouldNeedTempFBO) {
             *wouldNeedTempFBO = NULL == dst->asRenderTarget() || NULL == src->asRenderTarget();
         }
         return true;
     } else {
         return false;
     }
 }
 inline bool can_copy_texsubimage(const GrSurface* dst,
                                  const GrSurface* src,
                                  const GrGpuGL* gpu,
                                  bool* wouldNeedTempFBO = NULL) {
     // Table 3.9 of the ES2 spec indicates the supported formats with CopyTexSubImage
     // and BGRA isn't in the spec. There doesn't appear to be any extension that adds it. Perhaps
     // many drivers would allow it to work, but ANGLE does not.
     if (kGLES_GrGLStandard == gpu->glStandard() && gpu->glCaps().bgraIsInternalFormat() &&
         (kBGRA_8888_GrPixelConfig == dst->config() || kBGRA_8888_GrPixelConfig == src->config())) {
         return false;
     }
     const GrGLRenderTarget* dstRT = static_cast<const GrGLRenderTarget*>(dst->asRenderTarget());
     // If dst is multisampled (and uses an extension where there is a separate MSAA renderbuffer)
     // then we don't want to copy to the texture but to the MSAA buffer.
     if (NULL != dstRT && dstRT->renderFBOID() != dstRT->textureFBOID()) {
         return false;
     }
     const GrGLRenderTarget* srcRT = static_cast<const GrGLRenderTarget*>(src->asRenderTarget());
     // If the src is multisampled (and uses an extension where there is a separate MSAA
     // renderbuffer) then it is an invalid operation to call CopyTexSubImage
     if (NULL != srcRT && srcRT->renderFBOID() != srcRT->textureFBOID()) {
         return false;
     }
     if (gpu->glCaps().isConfigRenderable(src->config(), src->desc().fSampleCnt > 0) &&
         NULL != dst->asTexture() &&
         dst->origin() == src->origin() &&
         kIndex_8_GrPixelConfig != src->config()) {
         if (NULL != wouldNeedTempFBO) {
             *wouldNeedTempFBO = NULL == src->asRenderTarget();
         }
         return true;
     } else {
         return false;
     }
 }
 // If a temporary FBO was created, its non-zero ID is returned. The viewport that the copy rect is
 // relative to is output.
 inline GrGLuint bind_surface_as_fbo(const GrGLInterface* gl,
                                     GrSurface* surface,
                                     GrGLenum fboTarget,
                                     GrGLIRect* viewport) {
     GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(surface->asRenderTarget());
     GrGLuint tempFBOID;
     if (NULL == rt) {
         SkASSERT(NULL != surface->asTexture());
         GrGLuint texID = static_cast<GrGLTexture*>(surface->asTexture())->textureID();
         GR_GL_CALL(gl, GenFramebuffers(1, &tempFBOID));
         GR_GL_CALL(gl, BindFramebuffer(fboTarget, tempFBOID));
         GR_GL_CALL(gl, FramebufferTexture2D(fboTarget,
                                             GR_GL_COLOR_ATTACHMENT0,
                                             GR_GL_TEXTURE_2D,
                                             texID,
 ));
         viewport->fLeft = 0;
         viewport->fBottom = 0;
         viewport->fWidth = surface->width();
         viewport->fHeight = surface->height();
     } else {
         tempFBOID = 0;
         GR_GL_CALL(gl, BindFramebuffer(fboTarget, rt->renderFBOID()));
         *viewport = rt->getViewport();
     }
     return tempFBOID;
 }
 }
 void GrGpuGL::initCopySurfaceDstDesc(const GrSurface* src, GrTextureDesc* desc) {
     // Check for format issues with glCopyTexSubImage2D
     if (kGLES_GrGLStandard == this->glStandard() && this->glCaps().bgraIsInternalFormat() &&
         kBGRA_8888_GrPixelConfig == src->config()) {
         // glCopyTexSubImage2D doesn't work with this config. We'll want to make it a render target
         // in order to call glBlitFramebuffer or to copy to it by rendering.
         INHERITED::initCopySurfaceDstDesc(src, desc);
         return;
     } else if (NULL == src->asRenderTarget()) {
         // We don't want to have to create an FBO just to use glCopyTexSubImage2D. Let the base
         // class handle it by rendering.
         INHERITED::initCopySurfaceDstDesc(src, desc);
         return;
     }
     const GrGLRenderTarget* srcRT = static_cast<const GrGLRenderTarget*>(src->asRenderTarget());
     if (NULL != srcRT && srcRT->renderFBOID() != srcRT->textureFBOID()) {
         // It's illegal to call CopyTexSubImage2D on a MSAA renderbuffer.
         INHERITED::initCopySurfaceDstDesc(src, desc);
     } else {
         desc->fConfig = src->config();
         desc->fOrigin = src->origin();
         desc->fFlags = kNone_GrTextureFlags;
     }
 }
 bool GrGpuGL::onCopySurface(GrSurface* dst,
                             GrSurface* src,
                             const SkIRect& srcRect,
                             const SkIPoint& dstPoint) {
     bool inheritedCouldCopy = INHERITED::onCanCopySurface(dst, src, srcRect, dstPoint);
     bool copied = false;
     bool wouldNeedTempFBO = false;
     if (can_copy_texsubimage(dst, src, this, &wouldNeedTempFBO) &&
         (!wouldNeedTempFBO || !inheritedCouldCopy)) {
         GrGLuint srcFBO;
         GrGLIRect srcVP;
         srcFBO = bind_surface_as_fbo(this->glInterface(), src, GR_GL_FRAMEBUFFER, &srcVP);
         GrGLTexture* dstTex = static_cast<GrGLTexture*>(dst->asTexture());
         SkASSERT(NULL != dstTex);
         // We modified the bound FBO
         fHWBoundRenderTarget = NULL;
         GrGLIRect srcGLRect;
         srcGLRect.setRelativeTo(srcVP,
                                 srcRect.fLeft,
                                 srcRect.fTop,
                                 srcRect.width(),
                                 srcRect.height(),
                                 src->origin());
         this->setScratchTextureUnit();
         GL_CALL(BindTexture(GR_GL_TEXTURE_2D, dstTex->textureID()));
         GrGLint dstY;
         if (kBottomLeft_GrSurfaceOrigin == dst->origin()) {
             dstY = dst->height() - (dstPoint.fY + srcGLRect.fHeight);
         } else {
             dstY = dstPoint.fY;
         }
         GL_CALL(CopyTexSubImage2D(GR_GL_TEXTURE_2D, 0,
                                   dstPoint.fX, dstY,
                                   srcGLRect.fLeft, srcGLRect.fBottom,
                                   srcGLRect.fWidth, srcGLRect.fHeight));
         copied = true;
         if (srcFBO) {
             GL_CALL(DeleteFramebuffers(1, &srcFBO));
         }
     } else if (can_blit_framebuffer(dst, src, this, &wouldNeedTempFBO) &&
                (!wouldNeedTempFBO || !inheritedCouldCopy)) {
         SkIRect dstRect = SkIRect::MakeXYWH(dstPoint.fX, dstPoint.fY,
                                             srcRect.width(), srcRect.height());
         bool selfOverlap = false;
         if (dst->isSameAs(src)) {
             selfOverlap = SkIRect::IntersectsNoEmptyCheck(dstRect, srcRect);
         }
         if (!selfOverlap) {
             GrGLuint dstFBO;
             GrGLuint srcFBO;
             GrGLIRect dstVP;
             GrGLIRect srcVP;
             dstFBO = bind_surface_as_fbo(this->glInterface(), dst, GR_GL_DRAW_FRAMEBUFFER, &dstVP);
             srcFBO = bind_surface_as_fbo(this->glInterface(), src, GR_GL_READ_FRAMEBUFFER, &srcVP);
             // We modified the bound FBO
             fHWBoundRenderTarget = NULL;
             GrGLIRect srcGLRect;
             GrGLIRect dstGLRect;
             srcGLRect.setRelativeTo(srcVP,
                                     srcRect.fLeft,
                                     srcRect.fTop,
                                     srcRect.width(),
                                     srcRect.height(),
                                     src->origin());
             dstGLRect.setRelativeTo(dstVP,
                                     dstRect.fLeft,
                                     dstRect.fTop,
                                     dstRect.width(),
                                     dstRect.height(),
                                     dst->origin());
             GrAutoTRestore<ScissorState> asr;
             if (GrGLCaps::kDesktop_EXT_MSFBOType == this->glCaps().msFBOType()) {
                 // The EXT version applies the scissor during the blit, so disable it.
                 asr.reset(&fScissorState);
                 fScissorState.fEnabled = false;
                 this->flushScissor();
             }
             GrGLint srcY0;
             GrGLint srcY1;
             // Does the blit need to y-mirror or not?
             if (src->origin() == dst->origin()) {
                 srcY0 = srcGLRect.fBottom;
                 srcY1 = srcGLRect.fBottom + srcGLRect.fHeight;
             } else {
                 srcY0 = srcGLRect.fBottom + srcGLRect.fHeight;
                 srcY1 = srcGLRect.fBottom;
             }
             GL_CALL(BlitFramebuffer(srcGLRect.fLeft,
                                     srcY0,
                                     srcGLRect.fLeft + srcGLRect.fWidth,
                                     srcY1,
                                     dstGLRect.fLeft,
                                     dstGLRect.fBottom,
                                     dstGLRect.fLeft + dstGLRect.fWidth,
                                     dstGLRect.fBottom + dstGLRect.fHeight,
                                     GR_GL_COLOR_BUFFER_BIT, GR_GL_NEAREST));
             if (dstFBO) {
                 GL_CALL(DeleteFramebuffers(1, &dstFBO));
             }
             if (srcFBO) {
                 GL_CALL(DeleteFramebuffers(1, &srcFBO));
             }
             copied = true;
         }
     }
     if (!copied && inheritedCouldCopy) {
         copied = INHERITED::onCopySurface(dst, src, srcRect, dstPoint);
         SkASSERT(copied);
     }
     return copied;
 }
 bool GrGpuGL::onCanCopySurface(GrSurface* dst,
                                GrSurface* src,
                                const SkIRect& srcRect,
                                const SkIPoint& dstPoint) {
     // This mirrors the logic in onCopySurface.
     if (can_copy_texsubimage(dst, src, this)) {
         return true;
     }
     if (can_blit_framebuffer(dst, src, this)) {
         if (dst->isSameAs(src)) {
             SkIRect dstRect = SkIRect::MakeXYWH(dstPoint.fX, dstPoint.fY,
                                                 srcRect.width(), srcRect.height());
             if(!SkIRect::IntersectsNoEmptyCheck(dstRect, srcRect)) {
                 return true;
             }
         } else {
             return true;
         }
     }
     return INHERITED::onCanCopySurface(dst, src, srcRect, dstPoint);
 }
 void GrGpuGL::onInstantGpuTraceEvent(const char* marker) {
     if (this->caps()->gpuTracingSupport()) {
         // GL_CALL(InsertEventMarker(0, marker));
     }
 }
 void GrGpuGL::onPushGpuTraceEvent(const char* marker) {
     if (this->caps()->gpuTracingSupport()) {
         // GL_CALL(PushGroupMarker(0, marker));
     }
 }
 void GrGpuGL::onPopGpuTraceEvent() {
     if (this->caps()->gpuTracingSupport()) {
         // GL_CALL(PopGroupMarker());
     }
 }
 ///////////////////////////////////////////////////////////////////////////////
 GrGLAttribArrayState* GrGpuGL::HWGeometryState::bindArrayAndBuffersToDraw(
                                                 GrGpuGL* gpu,
                                                 const GrGLVertexBuffer* vbuffer,
                                                 const GrGLIndexBuffer* ibuffer) {
     SkASSERT(NULL != vbuffer);
     GrGLAttribArrayState* attribState;
     // We use a vertex array if we're on a core profile and the verts are in a VBO.
     if (gpu->glCaps().isCoreProfile() && !vbuffer->isCPUBacked()) {
         if (NULL == fVBOVertexArray || !fVBOVertexArray->isValid()) {
             SkSafeUnref(fVBOVertexArray);
             GrGLuint arrayID;
             GR_GL_CALL(gpu->glInterface(), GenVertexArrays(1, &arrayID));
             int attrCount = gpu->glCaps().maxVertexAttributes();
             fVBOVertexArray = SkNEW_ARGS(GrGLVertexArray, (gpu, arrayID, attrCount));
         }
         attribState = fVBOVertexArray->bindWithIndexBuffer(ibuffer);
     } else {
         if (NULL != ibuffer) {
             this->setIndexBufferIDOnDefaultVertexArray(gpu, ibuffer->bufferID());
         } else {
             this->setVertexArrayID(gpu, 0);
         }
         int attrCount = gpu->glCaps().maxVertexAttributes();
         if (fDefaultVertexArrayAttribState.count() != attrCount) {
             fDefaultVertexArrayAttribState.resize(attrCount);
         }
         attribState = &fDefaultVertexArrayAttribState;
     }
     return attribState;
 }

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gfx/skia/trunk/src/gpu/gl/GrGpuGL.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/gpu/gl/GrGpuGL.cpp