Initial change to move 2D kernel to its own file.
BUG=skia:
R=bsalomon@chromium.org, senorblanco@chromium.org, bsalomon@google.com
Author: joshualitt@chromium.org
Review URL: https://codereview.chromium.org/379253003
diff --git a/src/gpu/effects/GrMatrixConvolutionEffect.cpp b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
new file mode 100644
index 0000000..283138e
--- /dev/null
+++ b/src/gpu/effects/GrMatrixConvolutionEffect.cpp
@@ -0,0 +1,269 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "GrMatrixConvolutionEffect.h"
+#include "gl/GrGLShaderBuilder.h"
+#include "gl/GrGLEffect.h"
+#include "gl/GrGLSL.h"
+#include "gl/GrGLTexture.h"
+#include "GrTBackendEffectFactory.h"
+
+class GrGLMatrixConvolutionEffect : public GrGLEffect {
+public:
+ GrGLMatrixConvolutionEffect(const GrBackendEffectFactory& factory,
+ const GrDrawEffect& effect);
+ virtual void emitCode(GrGLShaderBuilder*,
+ const GrDrawEffect&,
+ const GrEffectKey&,
+ const char* outputColor,
+ const char* inputColor,
+ const TransformedCoordsArray&,
+ const TextureSamplerArray&) SK_OVERRIDE;
+
+ static inline void GenKey(const GrDrawEffect&, const GrGLCaps&, GrEffectKeyBuilder*);
+
+ virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
+
+private:
+ typedef GrGLUniformManager::UniformHandle UniformHandle;
+ typedef GrMatrixConvolutionEffect::TileMode TileMode;
+ SkISize fKernelSize;
+ TileMode fTileMode;
+ bool fConvolveAlpha;
+
+ UniformHandle fBoundsUni;
+ UniformHandle fKernelUni;
+ UniformHandle fImageIncrementUni;
+ UniformHandle fKernelOffsetUni;
+ UniformHandle fGainUni;
+ UniformHandle fBiasUni;
+
+ typedef GrGLEffect INHERITED;
+};
+
+GrGLMatrixConvolutionEffect::GrGLMatrixConvolutionEffect(const GrBackendEffectFactory& factory,
+ const GrDrawEffect& drawEffect)
+ : INHERITED(factory) {
+ const GrMatrixConvolutionEffect& m = drawEffect.castEffect<GrMatrixConvolutionEffect>();
+ fKernelSize = m.kernelSize();
+ fTileMode = m.tileMode();
+ fConvolveAlpha = m.convolveAlpha();
+}
+
+static void appendTextureLookup(GrGLShaderBuilder* builder,
+ const GrGLShaderBuilder::TextureSampler& sampler,
+ const char* coord,
+ const char* bounds,
+ GrMatrixConvolutionEffect::TileMode tileMode) {
+ SkString clampedCoord;
+ switch (tileMode) {
+ case GrMatrixConvolutionEffect::kClamp_TileMode:
+ clampedCoord.printf("clamp(%s, %s.xy, %s.zw)", coord, bounds, bounds);
+ coord = clampedCoord.c_str();
+ break;
+ case GrMatrixConvolutionEffect::kRepeat_TileMode:
+ clampedCoord.printf("mod(%s - %s.xy, %s.zw - %s.xy) + %s.xy", coord, bounds, bounds, bounds, bounds);
+ coord = clampedCoord.c_str();
+ break;
+ case GrMatrixConvolutionEffect::kClampToBlack_TileMode:
+ builder->fsCodeAppendf("clamp(%s, %s.xy, %s.zw) != %s ? vec4(0, 0, 0, 0) : ", coord, bounds, bounds, coord);
+ break;
+ }
+ builder->fsAppendTextureLookup(sampler, coord);
+}
+
+void GrGLMatrixConvolutionEffect::emitCode(GrGLShaderBuilder* builder,
+ const GrDrawEffect&,
+ const GrEffectKey& key,
+ const char* outputColor,
+ const char* inputColor,
+ const TransformedCoordsArray& coords,
+ const TextureSamplerArray& samplers) {
+ sk_ignore_unused_variable(inputColor);
+ SkString coords2D = builder->ensureFSCoords2D(coords, 0);
+ fBoundsUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
+ kVec4f_GrSLType, "Bounds");
+ fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
+ kVec2f_GrSLType, "ImageIncrement");
+ fKernelUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_Visibility,
+ kFloat_GrSLType,
+ "Kernel",
+ fKernelSize.width() * fKernelSize.height());
+ fKernelOffsetUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
+ kVec2f_GrSLType, "KernelOffset");
+ fGainUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
+ kFloat_GrSLType, "Gain");
+ fBiasUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
+ kFloat_GrSLType, "Bias");
+
+ const char* bounds = builder->getUniformCStr(fBoundsUni);
+ const char* kernelOffset = builder->getUniformCStr(fKernelOffsetUni);
+ const char* imgInc = builder->getUniformCStr(fImageIncrementUni);
+ const char* kernel = builder->getUniformCStr(fKernelUni);
+ const char* gain = builder->getUniformCStr(fGainUni);
+ const char* bias = builder->getUniformCStr(fBiasUni);
+ int kWidth = fKernelSize.width();
+ int kHeight = fKernelSize.height();
+
+ builder->fsCodeAppend("\t\tvec4 sum = vec4(0, 0, 0, 0);\n");
+ builder->fsCodeAppendf("\t\tvec2 coord = %s - %s * %s;\n", coords2D.c_str(), kernelOffset, imgInc);
+ builder->fsCodeAppendf("\t\tfor (int y = 0; y < %d; y++) {\n", kHeight);
+ builder->fsCodeAppendf("\t\t\tfor (int x = 0; x < %d; x++) {\n", kWidth);
+ builder->fsCodeAppendf("\t\t\t\tfloat k = %s[y * %d + x];\n", kernel, kWidth);
+ builder->fsCodeAppendf("\t\t\t\tvec2 coord2 = coord + vec2(x, y) * %s;\n", imgInc);
+ builder->fsCodeAppend("\t\t\t\tvec4 c = ");
+ appendTextureLookup(builder, samplers[0], "coord2", bounds, fTileMode);
+ builder->fsCodeAppend(";\n");
+ if (!fConvolveAlpha) {
+ builder->fsCodeAppend("\t\t\t\tc.rgb /= c.a;\n");
+ }
+ builder->fsCodeAppend("\t\t\t\tsum += c * k;\n");
+ builder->fsCodeAppend("\t\t\t}\n");
+ builder->fsCodeAppend("\t\t}\n");
+ if (fConvolveAlpha) {
+ builder->fsCodeAppendf("\t\t%s = sum * %s + %s;\n", outputColor, gain, bias);
+ builder->fsCodeAppendf("\t\t%s.rgb = clamp(%s.rgb, 0.0, %s.a);\n",
+ outputColor, outputColor, outputColor);
+ } else {
+ builder->fsCodeAppend("\t\tvec4 c = ");
+ appendTextureLookup(builder, samplers[0], coords2D.c_str(), bounds, fTileMode);
+ builder->fsCodeAppend(";\n");
+ builder->fsCodeAppendf("\t\t%s.a = c.a;\n", outputColor);
+ builder->fsCodeAppendf("\t\t%s.rgb = sum.rgb * %s + %s;\n", outputColor, gain, bias);
+ builder->fsCodeAppendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor);
+ }
+}
+
+namespace {
+
+int encodeXY(int x, int y) {
+ SkASSERT(x >= 1 && y >= 1 && x * y <= 32);
+ if (y < x)
+ return 0x40 | encodeXY(y, x);
+ else
+ return (0x40 >> x) | (y - x);
+}
+
+};
+
+void GrGLMatrixConvolutionEffect::GenKey(const GrDrawEffect& drawEffect,
+ const GrGLCaps&, GrEffectKeyBuilder* b) {
+ const GrMatrixConvolutionEffect& m = drawEffect.castEffect<GrMatrixConvolutionEffect>();
+ uint32_t key = encodeXY(m.kernelSize().width(), m.kernelSize().height());
+ key |= m.tileMode() << 7;
+ key |= m.convolveAlpha() ? 1 << 9 : 0;
+ b->add32(key);
+}
+
+void GrGLMatrixConvolutionEffect::setData(const GrGLUniformManager& uman,
+ const GrDrawEffect& drawEffect) {
+ const GrMatrixConvolutionEffect& conv = drawEffect.castEffect<GrMatrixConvolutionEffect>();
+ GrTexture& texture = *conv.texture(0);
+ // the code we generated was for a specific kernel size
+ SkASSERT(conv.kernelSize() == fKernelSize);
+ SkASSERT(conv.tileMode() == fTileMode);
+ float imageIncrement[2];
+ float ySign = texture.origin() == kTopLeft_GrSurfaceOrigin ? 1.0f : -1.0f;
+ imageIncrement[0] = 1.0f / texture.width();
+ imageIncrement[1] = ySign / texture.height();
+ uman.set2fv(fImageIncrementUni, 1, imageIncrement);
+ uman.set2fv(fKernelOffsetUni, 1, conv.kernelOffset());
+ uman.set1fv(fKernelUni, fKernelSize.width() * fKernelSize.height(), conv.kernel());
+ uman.set1f(fGainUni, conv.gain());
+ uman.set1f(fBiasUni, conv.bias());
+ const SkIRect& bounds = conv.bounds();
+ float left = (float) bounds.left() / texture.width();
+ float top = (float) bounds.top() / texture.height();
+ float right = (float) bounds.right() / texture.width();
+ float bottom = (float) bounds.bottom() / texture.height();
+ if (texture.origin() == kBottomLeft_GrSurfaceOrigin) {
+ uman.set4f(fBoundsUni, left, 1.0f - bottom, right, 1.0f - top);
+ } else {
+ uman.set4f(fBoundsUni, left, top, right, bottom);
+ }
+}
+
+GrMatrixConvolutionEffect::GrMatrixConvolutionEffect(GrTexture* texture,
+ const SkIRect& bounds,
+ const SkISize& kernelSize,
+ const SkScalar* kernel,
+ SkScalar gain,
+ SkScalar bias,
+ const SkIPoint& kernelOffset,
+ TileMode tileMode,
+ bool convolveAlpha)
+ : INHERITED(texture, MakeDivByTextureWHMatrix(texture)),
+ fBounds(bounds),
+ fKernelSize(kernelSize),
+ fGain(SkScalarToFloat(gain)),
+ fBias(SkScalarToFloat(bias) / 255.0f),
+ fTileMode(tileMode),
+ fConvolveAlpha(convolveAlpha) {
+ fKernel = new float[kernelSize.width() * kernelSize.height()];
+ for (int i = 0; i < kernelSize.width() * kernelSize.height(); i++) {
+ fKernel[i] = SkScalarToFloat(kernel[i]);
+ }
+ fKernelOffset[0] = static_cast<float>(kernelOffset.x());
+ fKernelOffset[1] = static_cast<float>(kernelOffset.y());
+ this->setWillNotUseInputColor();
+}
+
+GrMatrixConvolutionEffect::~GrMatrixConvolutionEffect() {
+ delete[] fKernel;
+}
+
+const GrBackendEffectFactory& GrMatrixConvolutionEffect::getFactory() const {
+ return GrTBackendEffectFactory<GrMatrixConvolutionEffect>::getInstance();
+}
+
+bool GrMatrixConvolutionEffect::onIsEqual(const GrEffect& sBase) const {
+ const GrMatrixConvolutionEffect& s = CastEffect<GrMatrixConvolutionEffect>(sBase);
+ return this->texture(0) == s.texture(0) &&
+ fKernelSize == s.kernelSize() &&
+ !memcmp(fKernel, s.kernel(),
+ fKernelSize.width() * fKernelSize.height() * sizeof(float)) &&
+ fGain == s.gain() &&
+ fBias == s.bias() &&
+ fKernelOffset == s.kernelOffset() &&
+ fTileMode == s.tileMode() &&
+ fConvolveAlpha == s.convolveAlpha();
+}
+
+GR_DEFINE_EFFECT_TEST(GrMatrixConvolutionEffect);
+
+GrEffect* GrMatrixConvolutionEffect::TestCreate(SkRandom* random,
+ GrContext* context,
+ const GrDrawTargetCaps&,
+ GrTexture* textures[]) {
+ int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
+ GrEffectUnitTest::kAlphaTextureIdx;
+ int width = random->nextRangeU(1, MAX_KERNEL_SIZE);
+ int height = random->nextRangeU(1, MAX_KERNEL_SIZE / width);
+ SkISize kernelSize = SkISize::Make(width, height);
+ SkAutoTDeleteArray<SkScalar> kernel(new SkScalar[width * height]);
+ for (int i = 0; i < width * height; i++) {
+ kernel.get()[i] = random->nextSScalar1();
+ }
+ SkScalar gain = random->nextSScalar1();
+ SkScalar bias = random->nextSScalar1();
+ SkIPoint kernelOffset = SkIPoint::Make(random->nextRangeU(0, kernelSize.width()),
+ random->nextRangeU(0, kernelSize.height()));
+ SkIRect bounds = SkIRect::MakeXYWH(random->nextRangeU(0, textures[texIdx]->width()),
+ random->nextRangeU(0, textures[texIdx]->height()),
+ random->nextRangeU(0, textures[texIdx]->width()),
+ random->nextRangeU(0, textures[texIdx]->height()));
+ TileMode tileMode = static_cast<TileMode>(random->nextRangeU(0, 2));
+ bool convolveAlpha = random->nextBool();
+ return GrMatrixConvolutionEffect::Create(textures[texIdx],
+ bounds,
+ kernelSize,
+ kernel.get(),
+ gain,
+ bias,
+ kernelOffset,
+ tileMode,
+ convolveAlpha);
+}