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Diffstat (limited to 'chromium/third_party/skia/src/effects/SkBitmapAlphaThresholdShader.cpp')
-rw-r--r--chromium/third_party/skia/src/effects/SkBitmapAlphaThresholdShader.cpp277
1 files changed, 0 insertions, 277 deletions
diff --git a/chromium/third_party/skia/src/effects/SkBitmapAlphaThresholdShader.cpp b/chromium/third_party/skia/src/effects/SkBitmapAlphaThresholdShader.cpp
deleted file mode 100644
index 44db167d4ec..00000000000
--- a/chromium/third_party/skia/src/effects/SkBitmapAlphaThresholdShader.cpp
+++ /dev/null
@@ -1,277 +0,0 @@
-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkBitmapAlphaThresholdShader.h"
-
-class BATShader : public SkShader {
-public:
- SK_DECLARE_INST_COUNT(BATShader);
-
- BATShader(const SkBitmap& bitmap, SkRegion region, U8CPU);
- BATShader(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
- // We should probably do something here.
- }
-
-
- virtual void shadeSpan(int x, int y, SkPMColor[], int count) SK_OVERRIDE {};
-
-#if SK_SUPPORT_GPU
- virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint& paint) const SK_OVERRIDE;
-#endif
-
- SK_DEVELOPER_TO_STRING();
- SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(BATShader)
-
-private:
- SkBitmap fBitmap;
- SkRegion fRegion;
- U8CPU fThreshold;
-
- typedef SkShader INHERITED;
-};
-
-SkShader* SkBitmapAlphaThresholdShader::Create(const SkBitmap& bitmap,
- const SkRegion& region,
- U8CPU threshold) {
- SkASSERT(threshold < 256);
- return SkNEW_ARGS(BATShader, (bitmap, region, threshold));
-}
-
-BATShader::BATShader(const SkBitmap& bitmap, SkRegion region, U8CPU threshold)
-: fBitmap(bitmap)
-, fRegion(region)
-, fThreshold(threshold) {
-};
-
-
-#ifdef SK_DEVELOPER
-void BATShader::toString(SkString* str) const {
- str->append("BATShader: (");
-
- fBitmap.toString(str);
-
- this->INHERITED::toString(str);
-
- str->append(")");
-}
-#endif
-
-#if SK_SUPPORT_GPU
-#include "GrContext.h"
-#include "GrCoordTransform.h"
-#include "GrEffect.h"
-#include "gl/GrGLEffect.h"
-#include "GrTBackendEffectFactory.h"
-#include "GrTextureAccess.h"
-
-#include "SkGr.h"
-
-/**
- * Could create specializations for some simple cases:
- * - The region is empty.
- * - The region fully contains the bitmap.
- * - The regions is 1 rect (or maybe a small number of rects).
- */
-class ThresholdEffect : public GrEffect {
-public:
- virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE {
- return GrTBackendEffectFactory<ThresholdEffect>::getInstance();
- }
-
- static GrEffectRef* Create(GrTexture* bmpTexture, const SkMatrix& bmpMatrix,
- GrTexture* maskTexture, const SkMatrix& maskMatrix,
- U8CPU threshold) {
- SkScalar thresh = SkIntToScalar(threshold) / 255;
-
- AutoEffectUnref effect(SkNEW_ARGS(ThresholdEffect, (bmpTexture, bmpMatrix,
- maskTexture, maskMatrix,
- thresh)));
- return CreateEffectRef(effect);
- }
-
- virtual void getConstantColorComponents(GrColor* color,
- uint32_t* validFlags) const SK_OVERRIDE {
- if ((kA_GrColorComponentFlag & *validFlags) && 0 == GrColorUnpackA(*color)) {
- return;
- }
- *validFlags = 0;
- return;
- }
-
- static const char* Name() { return "Bitmap Alpha Threshold"; }
-
- class GLEffect : public GrGLEffect {
- public:
- GLEffect(const GrBackendEffectFactory& factory,
- const GrDrawEffect& e)
- : GrGLEffect(factory)
- , fPrevThreshold(-SK_Scalar1) {
- }
-
- virtual void emitCode(GrGLShaderBuilder* builder,
- const GrDrawEffect& drawEffect,
- EffectKey key,
- const char* outputColor,
- const char* inputColor,
- const TransformedCoordsArray& coords,
- const TextureSamplerArray& samplers) SK_OVERRIDE {
- // put bitmap color in "color"
- builder->fsCodeAppend("\t\tvec4 color = ");
- builder->fsAppendTextureLookup(samplers[0], coords[0].c_str(), coords[0].type());
- builder->fsCodeAppend(";\n");
-
- // put alpha from mask texture in "mask"
- builder->fsCodeAppend("\t\tfloat mask = ");
- builder->fsAppendTextureLookup(samplers[1], coords[1].c_str(), coords[1].type());
- builder->fsCodeAppend(".a;\n");
-
- const char* threshold;
-
- fThresholdUniHandle = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
- kFloat_GrSLType,
- "threshold",
- &threshold);
- builder->fsCodeAppendf("\t\tfloat thresh = %s;\n", threshold);
-
- builder->fsCodeAppend("\t\tif (mask < 0.5) {\n"
- "\t\t\tif (color.a > thresh) {\n"
- "\t\t\t\tfloat scale = thresh / color.a;\n"
- "\t\t\t\tcolor.rgb *= scale;\n"
- "\t\t\t\tcolor.a = thresh;\n"
- "\t\t\t}\n"
- "\t\t} else if (color.a < thresh) {\n"
- "\t\t\tfloat scale = thresh / color.a;\n"
- "\t\t\tcolor.rgb *= scale;\n"
- "\t\t\tcolor.a = thresh;\n"
- "\t\t}\n");
-
- builder->fsCodeAppendf("color = %s = %s;\n", outputColor,
- (GrGLSLExpr4(inputColor) * GrGLSLExpr4("color")).c_str());
- }
-
- virtual void setData(const GrGLUniformManager& uman, const GrDrawEffect& e) SK_OVERRIDE {
- const ThresholdEffect& effect = e.castEffect<ThresholdEffect>();
- if (fPrevThreshold != effect.fThreshold) {
- uman.set1f(fThresholdUniHandle, effect.fThreshold);
- }
- }
-
- private:
- GrGLUniformManager::UniformHandle fThresholdUniHandle;
- SkScalar fPrevThreshold;
- };
-
- GR_DECLARE_EFFECT_TEST;
-
-private:
- ThresholdEffect(GrTexture* bmpTexture, const SkMatrix& bmpMatrix,
- GrTexture* maskTexture, const SkMatrix& maskMatrix,
- SkScalar threshold)
- : fBmpTransform(kLocal_GrCoordSet, bmpMatrix, bmpTexture)
- , fBmpAccess(bmpTexture, GrTextureParams())
- , fMaskTransform(kLocal_GrCoordSet, maskMatrix, maskTexture)
- , fMaskAccess(maskTexture, GrTextureParams())
- , fThreshold(threshold) {
- this->addCoordTransform(&fBmpTransform);
- this->addTextureAccess(&fBmpAccess);
- this->addCoordTransform(&fMaskTransform);
- this->addTextureAccess(&fMaskAccess);
- }
-
- virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE {
- const ThresholdEffect& e = CastEffect<ThresholdEffect>(other);
- return e.fBmpAccess.getTexture() == fBmpAccess.getTexture() &&
- e.fMaskAccess.getTexture() == fMaskAccess.getTexture() &&
- e.fBmpTransform.getMatrix() == fBmpTransform.getMatrix() &&
- e.fMaskTransform.getMatrix() == fMaskTransform.getMatrix() &&
- e.fThreshold == fThreshold;
- }
-
- GrCoordTransform fBmpTransform;
- GrTextureAccess fBmpAccess;
- GrCoordTransform fMaskTransform;
- GrTextureAccess fMaskAccess;
-
- SkScalar fThreshold;
-};
-
-GR_DEFINE_EFFECT_TEST(ThresholdEffect);
-
-GrEffectRef* ThresholdEffect::TestCreate(SkRandom* rand,
- GrContext*,
- const GrDrawTargetCaps&,
- GrTexture* textures[]) {
- GrTexture* bmpTex = textures[GrEffectUnitTest::kSkiaPMTextureIdx];
- GrTexture* maskTex = textures[GrEffectUnitTest::kAlphaTextureIdx];
- U8CPU thresh = rand->nextU() % 0xff;
- return ThresholdEffect::Create(bmpTex, SkMatrix::I(), maskTex, SkMatrix::I(), thresh);
-}
-
-GrEffectRef* BATShader::asNewEffect(GrContext* context, const SkPaint& paint) const {
- SkMatrix localInverse;
- if (!this->getLocalMatrix().invert(&localInverse)) {
- return NULL;
- }
-
- GrTextureDesc maskDesc;
- if (context->isConfigRenderable(kAlpha_8_GrPixelConfig, false)) {
- maskDesc.fConfig = kAlpha_8_GrPixelConfig;
- } else {
- maskDesc.fConfig = kRGBA_8888_GrPixelConfig;
- }
- maskDesc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
- const SkIRect& bounds = fRegion.getBounds();
- // Add one pixel of border to ensure that clamp mode will be all zeros
- // the outside.
- maskDesc.fWidth = bounds.width() + 2;
- maskDesc.fHeight = bounds.height() + 2;
- GrAutoScratchTexture ast(context, maskDesc, GrContext::kApprox_ScratchTexMatch);
- GrTexture* maskTexture = ast.texture();
- if (NULL == maskTexture) {
- return NULL;
- }
-
- GrPaint grPaint;
- grPaint.setBlendFunc(kOne_GrBlendCoeff, kZero_GrBlendCoeff);
- SkRegion::Iterator iter(fRegion);
- context->setRenderTarget(maskTexture->asRenderTarget());
- context->clear(NULL, 0x0, true);
-
- // offset to ensure border is zero on top/left
- SkMatrix matrix;
- matrix.setTranslate(SK_Scalar1, SK_Scalar1);
- context->setMatrix(matrix);
-
- while (!iter.done()) {
- SkRect rect = SkRect::Make(iter.rect());
- context->drawRect(grPaint, rect);
- iter.next();
- }
-
- GrTexture* bmpTexture = GrLockAndRefCachedBitmapTexture(context, fBitmap, NULL);
- if (NULL == bmpTexture) {
- return NULL;
- }
-
- SkMatrix bmpMatrix = localInverse;
- bmpMatrix.postIDiv(bmpTexture->width(), bmpTexture->height());
-
- SkMatrix maskMatrix = localInverse;
- // compensate for the border
- maskMatrix.postTranslate(SK_Scalar1, SK_Scalar1);
- maskMatrix.postIDiv(maskTexture->width(), maskTexture->height());
-
- GrEffectRef* effect = ThresholdEffect::Create(bmpTexture, bmpMatrix,
- maskTexture, maskMatrix,
- fThreshold);
-
- GrUnlockAndUnrefCachedBitmapTexture(bmpTexture);
-
- return effect;
-}
-
-#endif
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