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

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

gfx/skia/trunk/src/gpu/gl/GrGLCaps.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 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrGLCaps.h"
 #include "GrGLContext.h"
 #include "SkTSearch.h"
 #include "SkTSort.h"
 GrGLCaps::GrGLCaps() {
     this->reset();
 }
 void GrGLCaps::reset() {
     INHERITED::reset();
     fVerifiedColorConfigs.reset();
     fStencilFormats.reset();
     fStencilVerifiedColorConfigs.reset();
     fMSFBOType = kNone_MSFBOType;
     fFBFetchType = kNone_FBFetchType;
     fMaxFragmentUniformVectors = 0;
     fMaxVertexAttributes = 0;
     fMaxFragmentTextureUnits = 0;
     fMaxFixedFunctionTextureCoords = 0;
     fRGBA8RenderbufferSupport = false;
     fBGRAFormatSupport = false;
     fBGRAIsInternalFormat = false;
     fTextureSwizzleSupport = false;
     fUnpackRowLengthSupport = false;
     fUnpackFlipYSupport = false;
     fPackRowLengthSupport = false;
     fPackFlipYSupport = false;
     fTextureUsageSupport = false;
     fTexStorageSupport = false;
     fTextureRedSupport = false;
     fImagingSupport = false;
     fTwoFormatLimit = false;
     fFragCoordsConventionSupport = false;
     fVertexArrayObjectSupport = false;
     fUseNonVBOVertexAndIndexDynamicData = false;
     fIsCoreProfile = false;
     fFixedFunctionSupport = false;
     fDiscardFBSupport = false;
     fFullClearIsFree = false;
 }
 GrGLCaps::GrGLCaps(const GrGLCaps& caps) : GrDrawTargetCaps() {
     *this = caps;
 }
 GrGLCaps& GrGLCaps::operator = (const GrGLCaps& caps) {
     INHERITED::operator=(caps);
     fVerifiedColorConfigs = caps.fVerifiedColorConfigs;
     fStencilFormats = caps.fStencilFormats;
     fStencilVerifiedColorConfigs = caps.fStencilVerifiedColorConfigs;
     fMaxFragmentUniformVectors = caps.fMaxFragmentUniformVectors;
     fMaxVertexAttributes = caps.fMaxVertexAttributes;
     fMaxFragmentTextureUnits = caps.fMaxFragmentTextureUnits;
     fMaxFixedFunctionTextureCoords = caps.fMaxFixedFunctionTextureCoords;
     fMSFBOType = caps.fMSFBOType;
     fFBFetchType = caps.fFBFetchType;
     fRGBA8RenderbufferSupport = caps.fRGBA8RenderbufferSupport;
     fBGRAFormatSupport = caps.fBGRAFormatSupport;
     fBGRAIsInternalFormat = caps.fBGRAIsInternalFormat;
     fTextureSwizzleSupport = caps.fTextureSwizzleSupport;
     fUnpackRowLengthSupport = caps.fUnpackRowLengthSupport;
     fUnpackFlipYSupport = caps.fUnpackFlipYSupport;
     fPackRowLengthSupport = caps.fPackRowLengthSupport;
     fPackFlipYSupport = caps.fPackFlipYSupport;
     fTextureUsageSupport = caps.fTextureUsageSupport;
     fTexStorageSupport = caps.fTexStorageSupport;
     fTextureRedSupport = caps.fTextureRedSupport;
     fImagingSupport = caps.fImagingSupport;
     fTwoFormatLimit = caps.fTwoFormatLimit;
     fFragCoordsConventionSupport = caps.fFragCoordsConventionSupport;
     fVertexArrayObjectSupport = caps.fVertexArrayObjectSupport;
     fUseNonVBOVertexAndIndexDynamicData = caps.fUseNonVBOVertexAndIndexDynamicData;
     fIsCoreProfile = caps.fIsCoreProfile;
     fFixedFunctionSupport = caps.fFixedFunctionSupport;
     fDiscardFBSupport = caps.fDiscardFBSupport;
     fFullClearIsFree = caps.fFullClearIsFree;
     return *this;
 }
 void GrGLCaps::init(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
     this->reset();
     if (!ctxInfo.isInitialized()) {
         return;
     }
     GrGLStandard standard = ctxInfo.standard();
     GrGLVersion version = ctxInfo.version();
     /**************************************************************************
      * Caps specific to GrGLCaps
      **************************************************************************/
     if (kGLES_GrGLStandard == standard) {
         GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS,
                           &fMaxFragmentUniformVectors);
     } else {
         SkASSERT(kGL_GrGLStandard == standard);
         GrGLint max;
         GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max);
         fMaxFragmentUniformVectors = max / 4;
         if (version >= GR_GL_VER(3, 2)) {
             GrGLint profileMask;
             GR_GL_GetIntegerv(gli, GR_GL_CONTEXT_PROFILE_MASK, &profileMask);
             fIsCoreProfile = SkToBool(profileMask & GR_GL_CONTEXT_CORE_PROFILE_BIT);
         }
         if (!fIsCoreProfile) {
             fFixedFunctionSupport = true;
             GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_COORDS, &fMaxFixedFunctionTextureCoords);
             // Sanity check
             SkASSERT(fMaxFixedFunctionTextureCoords > 0 && fMaxFixedFunctionTextureCoords < 128);
         }
     }
     GR_GL_GetIntegerv(gli, GR_GL_MAX_VERTEX_ATTRIBS, &fMaxVertexAttributes);
     GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_IMAGE_UNITS, &fMaxFragmentTextureUnits);
     if (kGL_GrGLStandard == standard) {
         fRGBA8RenderbufferSupport = true;
     } else {
         fRGBA8RenderbufferSupport = version >= GR_GL_VER(3,0) ||
                                     ctxInfo.hasExtension("GL_OES_rgb8_rgba8") ||
                                     ctxInfo.hasExtension("GL_ARM_rgba8");
     }
     if (kGL_GrGLStandard == standard) {
         fBGRAFormatSupport = version >= GR_GL_VER(1,2) ||
                              ctxInfo.hasExtension("GL_EXT_bgra");
     } else {
         if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) {
             fBGRAFormatSupport = true;
         } else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) {
             fBGRAFormatSupport = true;
             fBGRAIsInternalFormat = true;
         }
         SkASSERT(fBGRAFormatSupport ||
                  kSkia8888_GrPixelConfig != kBGRA_8888_GrPixelConfig);
     }
     if (kGL_GrGLStandard == standard) {
         fTextureSwizzleSupport = version >= GR_GL_VER(3,3) ||
                                  ctxInfo.hasExtension("GL_ARB_texture_swizzle");
     } else {
         fTextureSwizzleSupport = version >= GR_GL_VER(3,0);
     }
     if (kGL_GrGLStandard == standard) {
         fUnpackRowLengthSupport = true;
         fUnpackFlipYSupport = false;
         fPackRowLengthSupport = true;
         fPackFlipYSupport = false;
     } else {
         fUnpackRowLengthSupport = version >= GR_GL_VER(3,0) ||
                                   ctxInfo.hasExtension("GL_EXT_unpack_subimage");
         fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy");
         fPackRowLengthSupport = version >= GR_GL_VER(3,0) ||
                                 ctxInfo.hasExtension("GL_NV_pack_subimage");
         fPackFlipYSupport =
             ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order");
     }
     fTextureUsageSupport = (kGLES_GrGLStandard == standard) &&
                             ctxInfo.hasExtension("GL_ANGLE_texture_usage");
     if (kGL_GrGLStandard == standard) {
         // The EXT version can apply to either GL or GLES.
         fTexStorageSupport = version >= GR_GL_VER(4,2) ||
                              ctxInfo.hasExtension("GL_ARB_texture_storage") ||
                              ctxInfo.hasExtension("GL_EXT_texture_storage");
     } else {
         // Qualcomm Adreno drivers appear to have issues with texture storage.
         fTexStorageSupport = (version >= GR_GL_VER(3,0) &&
                               kQualcomm_GrGLVendor != ctxInfo.vendor()) ||
                              ctxInfo.hasExtension("GL_EXT_texture_storage");
     }
     // ARB_texture_rg is part of OpenGL 3.0, but mesa doesn't support it if
     // it doesn't have ARB_texture_rg extension.
     if (kGL_GrGLStandard == standard) {
         if (ctxInfo.isMesa()) {
             fTextureRedSupport = ctxInfo.hasExtension("GL_ARB_texture_rg");
         } else {
             fTextureRedSupport = version >= GR_GL_VER(3,0) ||
                                  ctxInfo.hasExtension("GL_ARB_texture_rg");
         }
     } else {
         fTextureRedSupport =  version >= GR_GL_VER(3,0) ||
                               ctxInfo.hasExtension("GL_EXT_texture_rg");
     }
     fImagingSupport = kGL_GrGLStandard == standard &&
                       ctxInfo.hasExtension("GL_ARB_imaging");
     // ES 2 only guarantees RGBA/uchar + one other format/type combo for
     // ReadPixels. The other format has to checked at run-time since it
     // can change based on which render target is bound
     fTwoFormatLimit = kGLES_GrGLStandard == standard;
     // Known issue on at least some Intel platforms:
     // http://code.google.com/p/skia/issues/detail?id=946
     if (kIntel_GrGLVendor != ctxInfo.vendor()) {
         fFragCoordsConventionSupport = ctxInfo.glslGeneration() >= k150_GrGLSLGeneration ||
                                        ctxInfo.hasExtension("GL_ARB_fragment_coord_conventions");
     }
     // SGX and Mali GPUs that are based on a tiled-deferred architecture that have trouble with
     // frequently changing VBOs. We've measured a performance increase using non-VBO vertex
     // data for dynamic content on these GPUs. Perhaps we should read the renderer string and
     // limit this decision to specific GPU families rather than basing it on the vendor alone.
     if (!GR_GL_MUST_USE_VBO &&
         (kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor())) {
         fUseNonVBOVertexAndIndexDynamicData = true;
     }
     fDiscardFBSupport = ctxInfo.hasExtension("GL_EXT_discard_framebuffer");
     if (kARM_GrGLVendor == ctxInfo.vendor() || kImagination_GrGLVendor == ctxInfo.vendor()) {
         fFullClearIsFree = true;
     }
     if (kGL_GrGLStandard == standard) {
         fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) ||
                                     ctxInfo.hasExtension("GL_ARB_vertex_array_object");
     } else {
         fVertexArrayObjectSupport = version >= GR_GL_VER(3, 0) ||
                                     ctxInfo.hasExtension("GL_OES_vertex_array_object");
     }
     if (kGLES_GrGLStandard == standard) {
         if (ctxInfo.hasExtension("GL_EXT_shader_framebuffer_fetch")) {
             fFBFetchType = kEXT_FBFetchType;
         } else if (ctxInfo.hasExtension("GL_NV_shader_framebuffer_fetch")) {
             fFBFetchType = kNV_FBFetchType;
         }
     }
     this->initFSAASupport(ctxInfo, gli);
     this->initStencilFormats(ctxInfo);
     /**************************************************************************
      * GrDrawTargetCaps fields
      **************************************************************************/
     GrGLint numFormats;
     GR_GL_GetIntegerv(gli, GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats);
     if (numFormats) {
         SkAutoSTMalloc<10, GrGLint> formats(numFormats);
         GR_GL_GetIntegerv(gli, GR_GL_COMPRESSED_TEXTURE_FORMATS, formats);
         for (int i = 0; i < numFormats; ++i) {
             if (formats[i] == GR_GL_PALETTE8_RGBA8) {
                 f8BitPaletteSupport = true;
                 break;
             }
         }
     }
     if (kGL_GrGLStandard == standard) {
         // we could also look for GL_ATI_separate_stencil extension or
         // GL_EXT_stencil_two_side but they use different function signatures
         // than GL2.0+ (and than each other).
         fTwoSidedStencilSupport = (ctxInfo.version() >= GR_GL_VER(2,0));
         // supported on GL 1.4 and higher or by extension
         fStencilWrapOpsSupport = (ctxInfo.version() >= GR_GL_VER(1,4)) ||
                                   ctxInfo.hasExtension("GL_EXT_stencil_wrap");
     } else {
         // ES 2 has two sided stencil and stencil wrap
         fTwoSidedStencilSupport = true;
         fStencilWrapOpsSupport = true;
     }
     if (kGL_GrGLStandard == standard) {
         fBufferLockSupport = true; // we require VBO support and the desktop VBO extension includes
                                    // glMapBuffer.
     } else {
         fBufferLockSupport = ctxInfo.hasExtension("GL_OES_mapbuffer");
     }
     if (kGL_GrGLStandard == standard) {
         SkASSERT(ctxInfo.version() >= GR_GL_VER(2,0) ||
                  ctxInfo.hasExtension("GL_ARB_texture_non_power_of_two"));
         fNPOTTextureTileSupport = true;
         fMipMapSupport = true;
     } else {
         // Unextended ES2 supports NPOT textures with clamp_to_edge and non-mip filters only
         // ES3 has no limitations.
         fNPOTTextureTileSupport = ctxInfo.version() >= GR_GL_VER(3,0) ||
                                   ctxInfo.hasExtension("GL_OES_texture_npot");
         // ES2 supports MIP mapping for POT textures but our caps don't allow for limited MIP
         // support. The OES extension or ES 3.0 allow for MIPS on NPOT textures. So, apparently,
         // does the undocumented GL_IMG_texture_npot extension. This extension does not seem to
         // to alllow arbitrary wrap modes, however.
         fMipMapSupport = fNPOTTextureTileSupport || ctxInfo.hasExtension("GL_IMG_texture_npot");
     }
     fHWAALineSupport = (kGL_GrGLStandard == standard);
     GR_GL_GetIntegerv(gli, GR_GL_MAX_TEXTURE_SIZE, &fMaxTextureSize);
     GR_GL_GetIntegerv(gli, GR_GL_MAX_RENDERBUFFER_SIZE, &fMaxRenderTargetSize);
     // Our render targets are always created with textures as the color
     // attachment, hence this min:
     fMaxRenderTargetSize = GrMin(fMaxTextureSize, fMaxRenderTargetSize);
     fPathRenderingSupport = ctxInfo.hasExtension("GL_NV_path_rendering");
     SkASSERT(!fPathRenderingSupport || fFixedFunctionSupport);
     fGpuTracingSupport = ctxInfo.hasExtension("GL_EXT_debug_marker");
     fDstReadInShaderSupport = kNone_FBFetchType != fFBFetchType;
     // Disable scratch texture reuse on Mali and Adreno devices
     fReuseScratchTextures = kARM_GrGLVendor != ctxInfo.vendor() &&
                             kQualcomm_GrGLVendor != ctxInfo.vendor();
     // Enable supported shader-related caps
     if (kGL_GrGLStandard == standard) {
         fDualSourceBlendingSupport = ctxInfo.version() >= GR_GL_VER(3,3) ||
                                      ctxInfo.hasExtension("GL_ARB_blend_func_extended");
         fShaderDerivativeSupport = true;
         // we don't support GL_ARB_geometry_shader4, just GL 3.2+ GS
         fGeometryShaderSupport = ctxInfo.version() >= GR_GL_VER(3,2) &&
                                  ctxInfo.glslGeneration() >= k150_GrGLSLGeneration;
     } else {
         fShaderDerivativeSupport = ctxInfo.hasExtension("GL_OES_standard_derivatives");
     }
     if (GrGLCaps::kES_IMG_MsToTexture_MSFBOType == fMSFBOType) {
         GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES_IMG, &fMaxSampleCount);
     } else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) {
         GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &fMaxSampleCount);
     }
     this->initConfigRenderableTable(ctxInfo);
 }
 void GrGLCaps::initConfigRenderableTable(const GrGLContextInfo& ctxInfo) {
     // OpenGL < 3.0
     //  no support for render targets unless the GL_ARB_framebuffer_object
     //  extension is supported (in which case we get ALPHA, RED, RG, RGB,
     //  RGBA (ALPHA8, RGBA4, RGBA8) for OpenGL > 1.1). Note that we
     //  probably don't get R8 in this case.
     // OpenGL 3.0
     //  base color renderable: ALPHA, RED, RG, RGB, and RGBA
     //  sized derivatives: ALPHA8, R8, RGBA4, RGBA8
     // >= OpenGL 3.1
     //  base color renderable: RED, RG, RGB, and RGBA
     //  sized derivatives: R8, RGBA4, RGBA8
     //  if the GL_ARB_compatibility extension is supported then we get back
     //  support for GL_ALPHA and ALPHA8
     // GL_EXT_bgra adds BGRA render targets to any version
     // ES 2.0
     //  color renderable: RGBA4, RGB5_A1, RGB565
     //  GL_EXT_texture_rg adds support for R8 as a color render target
     //  GL_OES_rgb8_rgba8 and/or GL_ARM_rgba8 adds support for RGBA8
     //  GL_EXT_texture_format_BGRA8888 and/or GL_APPLE_texture_format_BGRA8888 added BGRA support
     // ES 3.0
     // Same as ES 2.0 except R8 and RGBA8 are supported without extensions (the functions called
     // below already account for this).
     enum {
         kNo_MSAA = 0,
         kYes_MSAA = 1,
     };
     if (kGL_GrGLStandard == ctxInfo.standard()) {
         // Post 3.0 we will get R8
         // Prior to 3.0 we will get ALPHA8 (with GL_ARB_framebuffer_object)
         if (ctxInfo.version() >= GR_GL_VER(3,0) ||
             ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
             fConfigRenderSupport[kAlpha_8_GrPixelConfig][kNo_MSAA] = true;
             fConfigRenderSupport[kAlpha_8_GrPixelConfig][kYes_MSAA] = true;
         }
     } else {
         // On ES we can only hope for R8
         fConfigRenderSupport[kAlpha_8_GrPixelConfig][kNo_MSAA] = fTextureRedSupport;
         fConfigRenderSupport[kAlpha_8_GrPixelConfig][kYes_MSAA] = fTextureRedSupport;
     }
     if (kGL_GrGLStandard != ctxInfo.standard()) {
         // only available in ES
         fConfigRenderSupport[kRGB_565_GrPixelConfig][kNo_MSAA] = true;
         fConfigRenderSupport[kRGB_565_GrPixelConfig][kYes_MSAA] = true;
     }
     // we no longer support 444 as a render target
     fConfigRenderSupport[kRGBA_4444_GrPixelConfig][kNo_MSAA]  = false;
     fConfigRenderSupport[kRGBA_4444_GrPixelConfig][kYes_MSAA]  = false;
     if (this->fRGBA8RenderbufferSupport) {
         fConfigRenderSupport[kRGBA_8888_GrPixelConfig][kNo_MSAA]  = true;
         fConfigRenderSupport[kRGBA_8888_GrPixelConfig][kYes_MSAA]  = true;
     }
     if (this->fBGRAFormatSupport) {
         fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kNo_MSAA]  = true;
         // The GL_EXT_texture_format_BGRA8888 extension does not add BGRA to the list of
         // configs that are color-renderable and can be passed to glRenderBufferStorageMultisample.
         // Chromium may have an extension to allow BGRA renderbuffers to work on desktop platforms.
         if (ctxInfo.hasExtension("GL_CHROMIUM_renderbuffer_format_BGRA8888")) {
             fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] = true;
         } else {
             fConfigRenderSupport[kBGRA_8888_GrPixelConfig][kYes_MSAA] =
                 !fBGRAIsInternalFormat || !this->usesMSAARenderBuffers();
         }
     }
     // If we don't support MSAA then undo any places above where we set a config as renderable with
     // msaa.
     if (kNone_MSFBOType == fMSFBOType) {
         for (int i = 0; i < kGrPixelConfigCnt; ++i) {
             fConfigRenderSupport[i][kYes_MSAA] = false;
         }
     }
 }
 bool GrGLCaps::readPixelsSupported(const GrGLInterface* intf,
                                    GrGLenum format,
                                    GrGLenum type) const {
     if (GR_GL_RGBA == format && GR_GL_UNSIGNED_BYTE == type) {
         // ES 2 guarantees this format is supported
         return true;
     }
     if (!fTwoFormatLimit) {
         // not limited by ES 2's constraints
         return true;
     }
     GrGLint otherFormat = GR_GL_RGBA;
     GrGLint otherType = GR_GL_UNSIGNED_BYTE;
     // The other supported format/type combo supported for ReadPixels
     // can change based on which render target is bound
     GR_GL_GetIntegerv(intf,
                       GR_GL_IMPLEMENTATION_COLOR_READ_FORMAT,
                       &otherFormat);
     GR_GL_GetIntegerv(intf,
                       GR_GL_IMPLEMENTATION_COLOR_READ_TYPE,
                       &otherType);
     return (GrGLenum)otherFormat == format && (GrGLenum)otherType == type;
 }
 void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
     fMSFBOType = kNone_MSFBOType;
     if (kGL_GrGLStandard != ctxInfo.standard()) {
         // We prefer the EXT/IMG extension over ES3 MSAA because we've observed
         // ES3 driver bugs on at least one device with a tiled GPU (N10).
         if (ctxInfo.hasExtension("GL_EXT_multisampled_render_to_texture")) {
             fMSFBOType = kES_EXT_MsToTexture_MSFBOType;
         } else if (ctxInfo.hasExtension("GL_IMG_multisampled_render_to_texture")) {
             fMSFBOType = kES_IMG_MsToTexture_MSFBOType;
         } else if (ctxInfo.version() >= GR_GL_VER(3,0)) {
             fMSFBOType = GrGLCaps::kES_3_0_MSFBOType;
         } else if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) {
             // chrome's extension is equivalent to the EXT msaa
             // and fbo_blit extensions.
             fMSFBOType = kDesktop_EXT_MSFBOType;
         } else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) {
             fMSFBOType = kES_Apple_MSFBOType;
         }
     } else {
         if ((ctxInfo.version() >= GR_GL_VER(3,0)) ||
             ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
             fMSFBOType = GrGLCaps::kDesktop_ARB_MSFBOType;
         } else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") &&
                    ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) {
             fMSFBOType = GrGLCaps::kDesktop_EXT_MSFBOType;
         }
     }
 }
 namespace {
 const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount;
 }
 void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) {
     // Build up list of legal stencil formats (though perhaps not supported on
     // the particular gpu/driver) from most preferred to least.
     // these consts are in order of most preferred to least preferred
     // we don't bother with GL_STENCIL_INDEX1 or GL_DEPTH32F_STENCIL8
     static const StencilFormat
                   // internal Format      stencil bits      total bits        packed?
         gS8    = {GR_GL_STENCIL_INDEX8,   8,                8,                false},
         gS16   = {GR_GL_STENCIL_INDEX16,  16,               16,               false},
         gD24S8 = {GR_GL_DEPTH24_STENCIL8, 8,                32,               true },
         gS4    = {GR_GL_STENCIL_INDEX4,   4,                4,                false},
     //  gS     = {GR_GL_STENCIL_INDEX,    kUnknownBitCount, kUnknownBitCount, false},
         gDS    = {GR_GL_DEPTH_STENCIL,    kUnknownBitCount, kUnknownBitCount, true };
     if (kGL_GrGLStandard == ctxInfo.standard()) {
         bool supportsPackedDS =
             ctxInfo.version() >= GR_GL_VER(3,0) ||
             ctxInfo.hasExtension("GL_EXT_packed_depth_stencil") ||
             ctxInfo.hasExtension("GL_ARB_framebuffer_object");
         // S1 thru S16 formats are in GL 3.0+, EXT_FBO, and ARB_FBO since we
         // require FBO support we can expect these are legal formats and don't
         // check. These also all support the unsized GL_STENCIL_INDEX.
         fStencilFormats.push_back() = gS8;
         fStencilFormats.push_back() = gS16;
         if (supportsPackedDS) {
             fStencilFormats.push_back() = gD24S8;
         }
         fStencilFormats.push_back() = gS4;
         if (supportsPackedDS) {
             fStencilFormats.push_back() = gDS;
         }
     } else {
         // ES2 has STENCIL_INDEX8 without extensions but requires extensions
         // for other formats.
         // ES doesn't support using the unsized format.
         fStencilFormats.push_back() = gS8;
         //fStencilFormats.push_back() = gS16;
         if (ctxInfo.version() >= GR_GL_VER(3,0) ||
             ctxInfo.hasExtension("GL_OES_packed_depth_stencil")) {
             fStencilFormats.push_back() = gD24S8;
         }
         if (ctxInfo.hasExtension("GL_OES_stencil4")) {
             fStencilFormats.push_back() = gS4;
         }
     }
     SkASSERT(0 == fStencilVerifiedColorConfigs.count());
     fStencilVerifiedColorConfigs.push_back_n(fStencilFormats.count());
 }
 void GrGLCaps::markColorConfigAndStencilFormatAsVerified(
                                     GrPixelConfig config,
                                     const GrGLStencilBuffer::Format& format) {
 #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
     return;
 #endif
     SkASSERT((unsigned)config < (unsigned)kGrPixelConfigCnt);
     SkASSERT(fStencilFormats.count() == fStencilVerifiedColorConfigs.count());
     int count = fStencilFormats.count();
     // we expect a really small number of possible formats so linear search
     // should be OK
     SkASSERT(count < 16);
     for (int i = 0; i < count; ++i) {
         if (format.fInternalFormat ==
             fStencilFormats[i].fInternalFormat) {
             fStencilVerifiedColorConfigs[i].markVerified(config);
             return;
         }
     }
     GrCrash("Why are we seeing a stencil format that "
             "GrGLCaps doesn't know about.");
 }
 bool GrGLCaps::isColorConfigAndStencilFormatVerified(
                                 GrPixelConfig config,
                                 const GrGLStencilBuffer::Format& format) const {
 #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT
     return false;
 #endif
     SkASSERT((unsigned)config < (unsigned)kGrPixelConfigCnt);
     int count = fStencilFormats.count();
     // we expect a really small number of possible formats so linear search
     // should be OK
     SkASSERT(count < 16);
     for (int i = 0; i < count; ++i) {
         if (format.fInternalFormat ==
             fStencilFormats[i].fInternalFormat) {
             return fStencilVerifiedColorConfigs[i].isVerified(config);
         }
     }
     GrCrash("Why are we seeing a stencil format that "
             "GLCaps doesn't know about.");
     return false;
 }
 SkString GrGLCaps::dump() const {
     SkString r = INHERITED::dump();
     r.appendf("--- GL-Specific ---\n");
     for (int i = 0; i < fStencilFormats.count(); ++i) {
         r.appendf("Stencil Format %d, stencil bits: %02d, total bits: %02d\n",
                  i,
                  fStencilFormats[i].fStencilBits,
                  fStencilFormats[i].fTotalBits);
     }
     static const char* kMSFBOExtStr[] = {
         "None",
         "ARB",
         "EXT",
         "ES 3.0",
         "Apple",
         "IMG MS To Texture",
         "EXT MS To Texture",
     };
     GR_STATIC_ASSERT(0 == kNone_MSFBOType);
     GR_STATIC_ASSERT(1 == kDesktop_ARB_MSFBOType);
     GR_STATIC_ASSERT(2 == kDesktop_EXT_MSFBOType);
     GR_STATIC_ASSERT(3 == kES_3_0_MSFBOType);
     GR_STATIC_ASSERT(4 == kES_Apple_MSFBOType);
     GR_STATIC_ASSERT(5 == kES_IMG_MsToTexture_MSFBOType);
     GR_STATIC_ASSERT(6 == kES_EXT_MsToTexture_MSFBOType);
     GR_STATIC_ASSERT(GR_ARRAY_COUNT(kMSFBOExtStr) == kLast_MSFBOType + 1);
     static const char* kFBFetchTypeStr[] = {
         "None",
         "EXT",
         "NV",
     };
     GR_STATIC_ASSERT(0 == kNone_FBFetchType);
     GR_STATIC_ASSERT(1 == kEXT_FBFetchType);
     GR_STATIC_ASSERT(2 == kNV_FBFetchType);
     GR_STATIC_ASSERT(GR_ARRAY_COUNT(kFBFetchTypeStr) == kLast_FBFetchType + 1);
     r.appendf("Core Profile: %s\n", (fIsCoreProfile ? "YES" : "NO"));
     r.appendf("Fixed Function Support: %s\n", (fFixedFunctionSupport ? "YES" : "NO"));
     r.appendf("MSAA Type: %s\n", kMSFBOExtStr[fMSFBOType]);
     r.appendf("FB Fetch Type: %s\n", kFBFetchTypeStr[fFBFetchType]);
     r.appendf("Max FS Uniform Vectors: %d\n", fMaxFragmentUniformVectors);
     r.appendf("Max FS Texture Units: %d\n", fMaxFragmentTextureUnits);
     if (fFixedFunctionSupport) {
         r.appendf("Max Fixed Function Texture Coords: %d\n", fMaxFixedFunctionTextureCoords);
     }
     r.appendf("Max Vertex Attributes: %d\n", fMaxVertexAttributes);
     r.appendf("Support RGBA8 Render Buffer: %s\n", (fRGBA8RenderbufferSupport ? "YES": "NO"));
     r.appendf("BGRA support: %s\n", (fBGRAFormatSupport ? "YES": "NO"));
     r.appendf("BGRA is an internal format: %s\n", (fBGRAIsInternalFormat ? "YES": "NO"));
     r.appendf("Support texture swizzle: %s\n", (fTextureSwizzleSupport ? "YES": "NO"));
     r.appendf("Unpack Row length support: %s\n", (fUnpackRowLengthSupport ? "YES": "NO"));
     r.appendf("Unpack Flip Y support: %s\n", (fUnpackFlipYSupport ? "YES": "NO"));
     r.appendf("Pack Row length support: %s\n", (fPackRowLengthSupport ? "YES": "NO"));
     r.appendf("Pack Flip Y support: %s\n", (fPackFlipYSupport ? "YES": "NO"));
     r.appendf("Texture Usage support: %s\n", (fTextureUsageSupport ? "YES": "NO"));
     r.appendf("Texture Storage support: %s\n", (fTexStorageSupport ? "YES": "NO"));
     r.appendf("GL_R support: %s\n", (fTextureRedSupport ? "YES": "NO"));
     r.appendf("GL_ARB_imaging support: %s\n", (fImagingSupport ? "YES": "NO"));
     r.appendf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
     r.appendf("Fragment coord conventions support: %s\n",
              (fFragCoordsConventionSupport ? "YES": "NO"));
     r.appendf("Vertex array object support: %s\n", (fVertexArrayObjectSupport ? "YES": "NO"));
     r.appendf("Use non-VBO for dynamic data: %s\n",
              (fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
     r.appendf("Discard FrameBuffer support: %s\n", (fDiscardFBSupport ? "YES" : "NO"));
     r.appendf("Full screen clear is free: %s\n", (fFullClearIsFree ? "YES" : "NO"));
     return r;
 }

The Tor Browser / annotate

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

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