diff options
Diffstat (limited to 'src/effects/SkTransparentShader.cpp')
-rw-r--r-- | src/effects/SkTransparentShader.cpp | 42 |
1 files changed, 29 insertions, 13 deletions
diff --git a/src/effects/SkTransparentShader.cpp b/src/effects/SkTransparentShader.cpp index bd8b99a3c0..0997e62013 100644 --- a/src/effects/SkTransparentShader.cpp +++ b/src/effects/SkTransparentShader.cpp @@ -11,26 +11,40 @@ #include "SkColorPriv.h" #include "SkString.h" -bool SkTransparentShader::setContext(const SkBitmap& device, - const SkPaint& paint, - const SkMatrix& matrix) { - fDevice = &device; - fAlpha = paint.getAlpha(); +SkShader::Context* SkTransparentShader::createContext(const SkBitmap& device, + const SkPaint& paint, + const SkMatrix& matrix, + void* storage) const { + if (!this->validContext(device, paint, matrix)) { + return NULL; + } + + return SkNEW_PLACEMENT_ARGS(storage, TransparentShaderContext, (*this, device, paint, matrix)); +} - return this->INHERITED::setContext(device, paint, matrix); +size_t SkTransparentShader::contextSize() const { + return sizeof(TransparentShaderContext); } -uint32_t SkTransparentShader::getFlags() { +SkTransparentShader::TransparentShaderContext::TransparentShaderContext( + const SkTransparentShader& shader, const SkBitmap& device, + const SkPaint& paint, const SkMatrix& matrix) + : INHERITED(shader, device, paint, matrix) + , fDevice(&device) {} + +SkTransparentShader::TransparentShaderContext::~TransparentShaderContext() {} + +uint32_t SkTransparentShader::TransparentShaderContext::getFlags() const { uint32_t flags = this->INHERITED::getFlags(); switch (fDevice->colorType()) { case kRGB_565_SkColorType: flags |= kHasSpan16_Flag; - if (fAlpha == 255) + if (this->getPaintAlpha() == 255) flags |= kOpaqueAlpha_Flag; break; case kN32_SkColorType: - if (fAlpha == 255 && fDevice->isOpaque()) + if (this->getPaintAlpha() == 255 && fDevice->isOpaque()) flags |= kOpaqueAlpha_Flag; break; default: @@ -39,8 +53,9 @@ uint32_t SkTransparentShader::getFlags() { return flags; } -void SkTransparentShader::shadeSpan(int x, int y, SkPMColor span[], int count) { - unsigned scale = SkAlpha255To256(fAlpha); +void SkTransparentShader::TransparentShaderContext::shadeSpan(int x, int y, SkPMColor span[], + int count) { + unsigned scale = SkAlpha255To256(this->getPaintAlpha()); switch (fDevice->colorType()) { case kN32_SkColorType: @@ -63,7 +78,7 @@ void SkTransparentShader::shadeSpan(int x, int y, SkPMColor span[], int count) { span[i] = SkPixel16ToPixel32(src[i]); } } else { - unsigned alpha = fAlpha; + unsigned alpha = this->getPaintAlpha(); for (int i = count - 1; i >= 0; --i) { uint16_t c = src[i]; unsigned r = SkPacked16ToR32(c); @@ -97,7 +112,8 @@ void SkTransparentShader::shadeSpan(int x, int y, SkPMColor span[], int count) { } } -void SkTransparentShader::shadeSpan16(int x, int y, uint16_t span[], int count) { +void SkTransparentShader::TransparentShaderContext::shadeSpan16(int x, int y, uint16_t span[], + int count) { SkASSERT(fDevice->colorType() == kRGB_565_SkColorType); uint16_t* src = fDevice->getAddr16(x, y); |