| /* |
| * 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 "SkBitmapProcShader.h" |
| #include "SkBitmapProcState.h" |
| #include "SkBitmapProvider.h" |
| #include "SkColorPriv.h" |
| #include "SkErrorInternals.h" |
| #include "SkPixelRef.h" |
| #include "SkReadBuffer.h" |
| #include "SkWriteBuffer.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "SkGrPriv.h" |
| #include "effects/GrBicubicEffect.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| #endif |
| |
| static bool only_scale_and_translate(const SkMatrix& matrix) { |
| unsigned mask = SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask; |
| return (matrix.getType() & ~mask) == 0; |
| } |
| |
| class BitmapProcInfoContext : public SkShader::Context { |
| public: |
| // The context takes ownership of the info. It will call its destructor |
| // but will NOT free the memory. |
| BitmapProcInfoContext(const SkShader& shader, const SkShader::ContextRec& rec, |
| SkBitmapProcInfo* info) |
| : INHERITED(shader, rec) |
| , fInfo(info) |
| { |
| fFlags = 0; |
| if (fInfo->fPixmap.isOpaque() && (255 == this->getPaintAlpha())) { |
| fFlags |= SkShader::kOpaqueAlpha_Flag; |
| } |
| |
| if (1 == fInfo->fPixmap.height() && only_scale_and_translate(this->getTotalInverse())) { |
| fFlags |= SkShader::kConstInY32_Flag; |
| } |
| } |
| |
| ~BitmapProcInfoContext() override { |
| // The bitmap proc state has been created outside of the context on memory that will be freed |
| // elsewhere. Only call the destructor but leave the freeing of the memory to the caller. |
| fInfo->~SkBitmapProcInfo(); |
| } |
| |
| uint32_t getFlags() const override { return fFlags; } |
| |
| private: |
| SkBitmapProcInfo* fInfo; |
| uint32_t fFlags; |
| |
| typedef SkShader::Context INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| class BitmapProcShaderContext : public BitmapProcInfoContext { |
| public: |
| // The context takes ownership of the state. It will call its destructor |
| // but will NOT free the memory. |
| BitmapProcShaderContext(const SkShader& shader, const SkShader::ContextRec& rec, |
| SkBitmapProcState* state) |
| : INHERITED(shader, rec, state) |
| , fState(state) |
| {} |
| |
| void shadeSpan(int x, int y, SkPMColor dstC[], int count) override { |
| const SkBitmapProcState& state = *fState; |
| if (state.getShaderProc32()) { |
| state.getShaderProc32()(&state, x, y, dstC, count); |
| return; |
| } |
| |
| const int BUF_MAX = 128; |
| uint32_t buffer[BUF_MAX]; |
| SkBitmapProcState::MatrixProc mproc = state.getMatrixProc(); |
| SkBitmapProcState::SampleProc32 sproc = state.getSampleProc32(); |
| const int max = state.maxCountForBufferSize(sizeof(buffer[0]) * BUF_MAX); |
| |
| SkASSERT(state.fPixmap.addr()); |
| |
| for (;;) { |
| int n = SkTMin(count, max); |
| SkASSERT(n > 0 && n < BUF_MAX*2); |
| mproc(state, buffer, n, x, y); |
| sproc(state, buffer, n, dstC); |
| |
| if ((count -= n) == 0) { |
| break; |
| } |
| SkASSERT(count > 0); |
| x += n; |
| dstC += n; |
| } |
| } |
| |
| ShadeProc asAShadeProc(void** ctx) override { |
| if (fState->getShaderProc32()) { |
| *ctx = fState; |
| return (ShadeProc)fState->getShaderProc32(); |
| } |
| return nullptr; |
| } |
| |
| private: |
| SkBitmapProcState* fState; |
| |
| typedef BitmapProcInfoContext INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| size_t SkBitmapProcShader::ContextSize(const ContextRec& rec) { |
| // The SkBitmapProcState is stored outside of the context object, with the context holding |
| // a pointer to it. |
| return sizeof(BitmapProcShaderContext) + sizeof(SkBitmapProcState); |
| } |
| |
| SkShader::Context* SkBitmapProcShader::MakeContext(const SkShader& shader, |
| TileMode tmx, TileMode tmy, |
| const SkBitmapProvider& provider, |
| const ContextRec& rec, void* storage) { |
| SkMatrix totalInverse; |
| // Do this first, so we know the matrix can be inverted. |
| if (!shader.computeTotalInverse(rec, &totalInverse)) { |
| return nullptr; |
| } |
| |
| void* stateStorage = (char*)storage + sizeof(BitmapProcShaderContext); |
| SkBitmapProcState* state = new (stateStorage) SkBitmapProcState(provider, tmx, tmy); |
| |
| SkASSERT(state); |
| if (!state->setup(totalInverse, *rec.fPaint)) { |
| state->~SkBitmapProcState(); |
| return nullptr; |
| } |
| |
| return new (storage) BitmapProcShaderContext(shader, rec, state); |
| } |
| |
| SkShader::Context* SkBitmapProcShader::onCreateContext(const ContextRec& rec, void* storage) const { |
| return MakeContext(*this, (TileMode)fTileModeX, (TileMode)fTileModeY, |
| SkBitmapProvider(fRawBitmap), rec, storage); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| SkBitmapProcShader::SkBitmapProcShader(const SkBitmap& src, TileMode tmx, TileMode tmy, |
| const SkMatrix* localMatrix) |
| : INHERITED(localMatrix) { |
| fRawBitmap = src; |
| fTileModeX = (uint8_t)tmx; |
| fTileModeY = (uint8_t)tmy; |
| } |
| |
| bool SkBitmapProcShader::onIsABitmap(SkBitmap* texture, SkMatrix* texM, TileMode xy[]) const { |
| if (texture) { |
| *texture = fRawBitmap; |
| } |
| if (texM) { |
| texM->reset(); |
| } |
| if (xy) { |
| xy[0] = (TileMode)fTileModeX; |
| xy[1] = (TileMode)fTileModeY; |
| } |
| return true; |
| } |
| |
| SkFlattenable* SkBitmapProcShader::CreateProc(SkReadBuffer& buffer) { |
| SkMatrix lm; |
| buffer.readMatrix(&lm); |
| SkBitmap bm; |
| if (!buffer.readBitmap(&bm)) { |
| return nullptr; |
| } |
| bm.setImmutable(); |
| TileMode mx = (TileMode)buffer.readUInt(); |
| TileMode my = (TileMode)buffer.readUInt(); |
| return SkShader::CreateBitmapShader(bm, mx, my, &lm); |
| } |
| |
| void SkBitmapProcShader::flatten(SkWriteBuffer& buffer) const { |
| buffer.writeMatrix(this->getLocalMatrix()); |
| buffer.writeBitmap(fRawBitmap); |
| buffer.writeUInt(fTileModeX); |
| buffer.writeUInt(fTileModeY); |
| } |
| |
| bool SkBitmapProcShader::isOpaque() const { |
| return fRawBitmap.isOpaque(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #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 can_use_color_shader(const SkBitmap& bm, SkColor* color) { |
| #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK |
| // HWUI does not support color shaders (see b/22390304) |
| return false; |
| #endif |
| |
| if (1 != bm.width() || 1 != bm.height()) { |
| return false; |
| } |
| |
| SkAutoLockPixels alp(bm); |
| if (!bm.readyToDraw()) { |
| return false; |
| } |
| |
| switch (bm.colorType()) { |
| case kN32_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 bitmap_is_too_big(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. |
| // |
| static const int kMaxSize = 65535; |
| |
| return bm.width() > kMaxSize || bm.height() > kMaxSize; |
| } |
| |
| SkShader* SkCreateBitmapShader(const SkBitmap& src, SkShader::TileMode tmx, |
| SkShader::TileMode tmy, const SkMatrix* localMatrix, |
| SkTBlitterAllocator* allocator) { |
| SkShader* shader; |
| SkColor color; |
| if (src.isNull() || bitmap_is_too_big(src)) { |
| if (nullptr == allocator) { |
| shader = new SkEmptyShader; |
| } else { |
| shader = allocator->createT<SkEmptyShader>(); |
| } |
| } else if (can_use_color_shader(src, &color)) { |
| if (nullptr == allocator) { |
| shader = new SkColorShader(color); |
| } else { |
| shader = allocator->createT<SkColorShader>(color); |
| } |
| } else { |
| if (nullptr == allocator) { |
| shader = new SkBitmapProcShader(src, tmx, tmy, localMatrix); |
| } else { |
| shader = allocator->createT<SkBitmapProcShader>(src, tmx, tmy, localMatrix); |
| } |
| } |
| 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[fTileModeX], |
| gTileModeName[fTileModeY]); |
| |
| str->append(" "); |
| fRawBitmap.toString(str); |
| |
| this->INHERITED::toString(str); |
| |
| str->append(")"); |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #if SK_SUPPORT_GPU |
| |
| #include "GrTextureAccess.h" |
| #include "SkGr.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| |
| const GrFragmentProcessor* SkBitmapProcShader::asFragmentProcessor(GrContext* context, |
| const SkMatrix& viewM, const SkMatrix* localMatrix, |
| SkFilterQuality filterQuality) const { |
| SkMatrix matrix; |
| matrix.setIDiv(fRawBitmap.width(), fRawBitmap.height()); |
| |
| SkMatrix lmInverse; |
| if (!this->getLocalMatrix().invert(&lmInverse)) { |
| return nullptr; |
| } |
| if (localMatrix) { |
| SkMatrix inv; |
| if (!localMatrix->invert(&inv)) { |
| return nullptr; |
| } |
| lmInverse.postConcat(inv); |
| } |
| matrix.preConcat(lmInverse); |
| |
| SkShader::TileMode tm[] = { |
| (TileMode)fTileModeX, |
| (TileMode)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. |
| bool doBicubic; |
| GrTextureParams::FilterMode textureFilterMode = |
| GrSkFilterQualityToGrFilterMode(filterQuality, viewM, this->getLocalMatrix(), |
| &doBicubic); |
| GrTextureParams params(tm, textureFilterMode); |
| SkAutoTUnref<GrTexture> texture(GrRefCachedBitmapTexture(context, fRawBitmap, params)); |
| |
| if (!texture) { |
| SkErrorInternals::SetError( kInternalError_SkError, |
| "Couldn't convert bitmap to texture."); |
| return nullptr; |
| } |
| |
| SkAutoTUnref<const GrFragmentProcessor> inner; |
| if (doBicubic) { |
| inner.reset(GrBicubicEffect::Create(texture, matrix, tm)); |
| } else { |
| inner.reset(GrSimpleTextureEffect::Create(texture, matrix, params)); |
| } |
| |
| if (kAlpha_8_SkColorType == fRawBitmap.colorType()) { |
| return GrFragmentProcessor::MulOutputByInputUnpremulColor(inner); |
| } |
| return GrFragmentProcessor::MulOutputByInputAlpha(inner); |
| } |
| |
| #endif |