The Tor Browser: gfx/skia/trunk/src/core/SkBitmapProcShader.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkBitmapProcShader.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkBitmapProcShader.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 "SkColorPriv.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 #include "SkPixelRef.h"
 #include "SkErrorInternals.h"
 #include "SkBitmapProcShader.h"
 #if SK_SUPPORT_GPU
 #include "effects/GrSimpleTextureEffect.h"
 #include "effects/GrBicubicEffect.h"
 #endif
 bool SkBitmapProcShader::CanDo(const SkBitmap& bm, TileMode tx, TileMode ty) {
     switch (bm.colorType()) {
         case kAlpha_8_SkColorType:
         case kRGB_565_SkColorType:
         case kIndex_8_SkColorType:
         case kPMColor_SkColorType:
     //        if (tx == ty && (kClamp_TileMode == tx || kRepeat_TileMode == tx))
                 return true;
         default:
             break;
     }
     return false;
 }
 SkBitmapProcShader::SkBitmapProcShader(const SkBitmap& src,
                                        TileMode tmx, TileMode tmy) {
     fRawBitmap = src;
     fState.fTileModeX = (uint8_t)tmx;
     fState.fTileModeY = (uint8_t)tmy;
     fFlags = 0; // computed in setContext
 }
 SkBitmapProcShader::SkBitmapProcShader(SkReadBuffer& buffer)
         : INHERITED(buffer) {
     buffer.readBitmap(&fRawBitmap);
     fRawBitmap.setImmutable();
     fState.fTileModeX = buffer.readUInt();
     fState.fTileModeY = buffer.readUInt();
     fFlags = 0; // computed in setContext
 }
 SkShader::BitmapType SkBitmapProcShader::asABitmap(SkBitmap* texture,
                                                    SkMatrix* texM,
                                                    TileMode xy[]) const {
     if (texture) {
         *texture = fRawBitmap;
     }
     if (texM) {
         texM->reset();
     }
     if (xy) {
         xy[0] = (TileMode)fState.fTileModeX;
         xy[1] = (TileMode)fState.fTileModeY;
     }
     return kDefault_BitmapType;
 }
 void SkBitmapProcShader::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeBitmap(fRawBitmap);
     buffer.writeUInt(fState.fTileModeX);
     buffer.writeUInt(fState.fTileModeY);
 }
 static bool only_scale_and_translate(const SkMatrix& matrix) {
     unsigned mask = SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask;
     return (matrix.getType() & ~mask) == 0;
 }
 bool SkBitmapProcShader::isOpaque() const {
     return fRawBitmap.isOpaque();
 }
 static bool valid_for_drawing(const SkBitmap& bm) {
     if (0 == bm.width() || 0 == bm.height()) {
         return false;   // nothing to draw
     }
     if (NULL == bm.pixelRef()) {
         return false;   // no pixels to read
     }
     if (kIndex_8_SkColorType == bm.colorType()) {
         // ugh, I have to lock-pixels to inspect the colortable
         SkAutoLockPixels alp(bm);
         if (!bm.getColorTable()) {
             return false;
         }
     }
     return true;
 }
 bool SkBitmapProcShader::setContext(const SkBitmap& device,
                                     const SkPaint& paint,
                                     const SkMatrix& matrix) {
     if (!fRawBitmap.getTexture() && !valid_for_drawing(fRawBitmap)) {
         return false;
     }
     // do this first, so we have a correct inverse matrix
     if (!this->INHERITED::setContext(device, paint, matrix)) {
         return false;
     }
     fState.fOrigBitmap = fRawBitmap;
     if (!fState.chooseProcs(this->getTotalInverse(), paint)) {
         this->INHERITED::endContext();
         return false;
     }
     const SkBitmap& bitmap = *fState.fBitmap;
     bool bitmapIsOpaque = bitmap.isOpaque();
     // update fFlags
     uint32_t flags = 0;
     if (bitmapIsOpaque && (255 == this->getPaintAlpha())) {
         flags |= kOpaqueAlpha_Flag;
     }
     switch (bitmap.colorType()) {
         case kRGB_565_SkColorType:
             flags |= (kHasSpan16_Flag | kIntrinsicly16_Flag);
             break;
         case kIndex_8_SkColorType:
         case kPMColor_SkColorType:
             if (bitmapIsOpaque) {
                 flags |= kHasSpan16_Flag;
             }
             break;
         case kAlpha_8_SkColorType:
             break;  // never set kHasSpan16_Flag
         default:
             break;
     }
     if (paint.isDither() && bitmap.colorType() != kRGB_565_SkColorType) {
         // gradients can auto-dither in their 16bit sampler, but we don't so
         // we clear the flag here.
         flags &= ~kHasSpan16_Flag;
     }
     // if we're only 1-pixel high, and we don't rotate, then we can claim this
     if (1 == bitmap.height() &&
             only_scale_and_translate(this->getTotalInverse())) {
         flags |= kConstInY32_Flag;
         if (flags & kHasSpan16_Flag) {
             flags |= kConstInY16_Flag;
         }
     }
     fFlags = flags;
     return true;
 }
 void SkBitmapProcShader::endContext() {
     fState.endContext();
     this->INHERITED::endContext();
 }
 #define BUF_MAX     128
 #define TEST_BUFFER_OVERRITEx
 #ifdef TEST_BUFFER_OVERRITE
     #define TEST_BUFFER_EXTRA   32
     #define TEST_PATTERN    0x88888888
 #else
     #define TEST_BUFFER_EXTRA   0
 #endif
 void SkBitmapProcShader::shadeSpan(int x, int y, SkPMColor dstC[], int count) {
     const SkBitmapProcState& state = fState;
     if (state.getShaderProc32()) {
         state.getShaderProc32()(state, x, y, dstC, count);
         return;
     }
     uint32_t buffer[BUF_MAX + TEST_BUFFER_EXTRA];
     SkBitmapProcState::MatrixProc   mproc = state.getMatrixProc();
     SkBitmapProcState::SampleProc32 sproc = state.getSampleProc32();
     int max = fState.maxCountForBufferSize(sizeof(buffer[0]) * BUF_MAX);
     SkASSERT(state.fBitmap->getPixels());
     SkASSERT(state.fBitmap->pixelRef() == NULL ||
              state.fBitmap->pixelRef()->isLocked());
     for (;;) {
         int n = count;
         if (n > max) {
             n = max;
         }
         SkASSERT(n > 0 && n < BUF_MAX*2);
 #ifdef TEST_BUFFER_OVERRITE
         for (int i = 0; i < TEST_BUFFER_EXTRA; i++) {
             buffer[BUF_MAX + i] = TEST_PATTERN;
         }
 #endif
         mproc(state, buffer, n, x, y);
 #ifdef TEST_BUFFER_OVERRITE
         for (int j = 0; j < TEST_BUFFER_EXTRA; j++) {
             SkASSERT(buffer[BUF_MAX + j] == TEST_PATTERN);
         }
 #endif
         sproc(state, buffer, n, dstC);
         if ((count -= n) == 0) {
             break;
         }
         SkASSERT(count > 0);
         x += n;
         dstC += n;
     }
 }
 SkShader::ShadeProc SkBitmapProcShader::asAShadeProc(void** ctx) {
     if (fState.getShaderProc32()) {
         *ctx = &fState;
         return (ShadeProc)fState.getShaderProc32();
     }
     return NULL;
 }
 void SkBitmapProcShader::shadeSpan16(int x, int y, uint16_t dstC[], int count) {
     const SkBitmapProcState& state = fState;
     if (state.getShaderProc16()) {
         state.getShaderProc16()(state, x, y, dstC, count);
         return;
     }
     uint32_t buffer[BUF_MAX];
     SkBitmapProcState::MatrixProc   mproc = state.getMatrixProc();
     SkBitmapProcState::SampleProc16 sproc = state.getSampleProc16();
     int max = fState.maxCountForBufferSize(sizeof(buffer));
     SkASSERT(state.fBitmap->getPixels());
     SkASSERT(state.fBitmap->pixelRef() == NULL ||
              state.fBitmap->pixelRef()->isLocked());
     for (;;) {
         int n = count;
         if (n > max) {
             n = max;
         }
         mproc(state, buffer, n, x, y);
         sproc(state, buffer, n, dstC);
         if ((count -= n) == 0) {
             break;
         }
         x += n;
         dstC += n;
     }
 }
 ///////////////////////////////////////////////////////////////////////////////
 #include "SkUnPreMultiply.h"
 #include "SkColorShader.h"
 #include "SkEmptyShader.h"
 // returns true and set color if the bitmap can be drawn as a single color
 // (for efficiency)
 static bool canUseColorShader(const SkBitmap& bm, SkColor* color) {
     if (1 != bm.width() || 1 != bm.height()) {
         return false;
     }
     SkAutoLockPixels alp(bm);
     if (!bm.readyToDraw()) {
         return false;
     }
     switch (bm.colorType()) {
         case kPMColor_SkColorType:
             *color = SkUnPreMultiply::PMColorToColor(*bm.getAddr32(0, 0));
             return true;
         case kRGB_565_SkColorType:
             *color = SkPixel16ToColor(*bm.getAddr16(0, 0));
             return true;
         case kIndex_8_SkColorType:
             *color = SkUnPreMultiply::PMColorToColor(bm.getIndex8Color(0, 0));
             return true;
         default: // just skip the other configs for now
             break;
     }
     return false;
 }
 static bool bitmapIsTooBig(const SkBitmap& bm) {
     // SkBitmapProcShader stores bitmap coordinates in a 16bit buffer, as it
     // communicates between its matrix-proc and its sampler-proc. Until we can
     // widen that, we have to reject bitmaps that are larger.
     //
     const int maxSize = 65535;
     return bm.width() > maxSize || bm.height() > maxSize;
 }
 SkShader* CreateBitmapShader(const SkBitmap& src, SkShader::TileMode tmx,
         SkShader::TileMode tmy, SkTBlitterAllocator* allocator) {
     SkShader* shader;
     SkColor color;
     if (src.isNull() || bitmapIsTooBig(src)) {
         if (NULL == allocator) {
             shader = SkNEW(SkEmptyShader);
         } else {
             shader = allocator->createT<SkEmptyShader>();
         }
     }
     else if (canUseColorShader(src, &color)) {
         if (NULL == allocator) {
             shader = SkNEW_ARGS(SkColorShader, (color));
         } else {
             shader = allocator->createT<SkColorShader>(color);
         }
     } else {
         if (NULL == allocator) {
             shader = SkNEW_ARGS(SkBitmapProcShader, (src, tmx, tmy));
         } else {
             shader = allocator->createT<SkBitmapProcShader>(src, tmx, tmy);
         }
     }
     return shader;
 }
 ///////////////////////////////////////////////////////////////////////////////
 #ifndef SK_IGNORE_TO_STRING
 void SkBitmapProcShader::toString(SkString* str) const {
     static const char* gTileModeName[SkShader::kTileModeCount] = {
         "clamp", "repeat", "mirror"
     };
     str->append("BitmapShader: (");
     str->appendf("(%s, %s)",
                  gTileModeName[fState.fTileModeX],
                  gTileModeName[fState.fTileModeY]);
     str->append(" ");
     fRawBitmap.toString(str);
     this->INHERITED::toString(str);
     str->append(")");
 }
 #endif
 ///////////////////////////////////////////////////////////////////////////////
 #if SK_SUPPORT_GPU
 #include "GrTextureAccess.h"
 #include "effects/GrSimpleTextureEffect.h"
 #include "SkGr.h"
 // Note that this will return -1 if either matrix is perspective.
 static SkScalar get_combined_min_stretch(const SkMatrix& viewMatrix, const SkMatrix& localMatrix) {
     if (localMatrix.isIdentity()) {
         return viewMatrix.getMinStretch();
     } else {
         SkMatrix combined;
         combined.setConcat(viewMatrix, localMatrix);
         return combined.getMinStretch();
     }
 }
 GrEffectRef* SkBitmapProcShader::asNewEffect(GrContext* context, const SkPaint& paint) const {
     SkMatrix matrix;
     matrix.setIDiv(fRawBitmap.width(), fRawBitmap.height());
     SkMatrix lmInverse;
     if (!this->getLocalMatrix().invert(&lmInverse)) {
         return NULL;
     }
     matrix.preConcat(lmInverse);
     SkShader::TileMode tm[] = {
         (TileMode)fState.fTileModeX,
         (TileMode)fState.fTileModeY,
     };
     // Must set wrap and filter on the sampler before requesting a texture. In two places below
     // we check the matrix scale factors to determine how to interpret the filter quality setting.
     // This completely ignores the complexity of the drawVertices case where explicit local coords
     // are provided by the caller.
     SkPaint::FilterLevel paintFilterLevel = paint.getFilterLevel();
     GrTextureParams::FilterMode textureFilterMode;
     switch(paintFilterLevel) {
         case SkPaint::kNone_FilterLevel:
             textureFilterMode = GrTextureParams::kNone_FilterMode;
             break;
         case SkPaint::kLow_FilterLevel:
             textureFilterMode = GrTextureParams::kBilerp_FilterMode;
             break;
         case SkPaint::kMedium_FilterLevel:
             if (get_combined_min_stretch(context->getMatrix(), this->getLocalMatrix()) <
                 SK_Scalar1) {
                 textureFilterMode = GrTextureParams::kMipMap_FilterMode;
             } else {
                 // Don't trigger MIP level generation unnecessarily.
                 textureFilterMode = GrTextureParams::kBilerp_FilterMode;
             }
             break;
         case SkPaint::kHigh_FilterLevel:
             // Minification can look bad with bicubic filtering.
             if (get_combined_min_stretch(context->getMatrix(), this->getLocalMatrix()) >=
                 SK_Scalar1) {
                 // fall back to no filtering here; we will install another shader that will do the
                 // HQ filtering.
                 textureFilterMode = GrTextureParams::kNone_FilterMode;
             } else {
                 // Fall back to MIP-mapping.
                 paintFilterLevel = SkPaint::kMedium_FilterLevel;
                 textureFilterMode = GrTextureParams::kMipMap_FilterMode;
             }
             break;
         default:
             SkErrorInternals::SetError( kInvalidPaint_SkError,
                                         "Sorry, I don't understand the filtering "
                                         "mode you asked for.  Falling back to "
                                         "MIPMaps.");
             textureFilterMode = GrTextureParams::kMipMap_FilterMode;
             break;
     }
     GrTextureParams params(tm, textureFilterMode);
     GrTexture* texture = GrLockAndRefCachedBitmapTexture(context, fRawBitmap, &params);
     if (NULL == texture) {
         SkErrorInternals::SetError( kInternalError_SkError,
                                     "Couldn't convert bitmap to texture.");
         return NULL;
     }
     GrEffectRef* effect = NULL;
     if (paintFilterLevel == SkPaint::kHigh_FilterLevel) {
         effect = GrBicubicEffect::Create(texture, matrix, tm);
     } else {
         effect = GrSimpleTextureEffect::Create(texture, matrix, params);
     }
     GrUnlockAndUnrefCachedBitmapTexture(texture);
     return effect;
 }
 #endif

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gfx/skia/trunk/src/core/SkBitmapProcShader.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/core/SkBitmapProcShader.cpp