Move GPU gradients into src/effects/gradients.
Review URL: https://codereview.appspot.com/6453055
git-svn-id: http://skia.googlecode.com/svn/trunk@4805 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/gradients/SkGradientShader.cpp b/src/effects/gradients/SkGradientShader.cpp
index 593d497..f5f3f5b 100644
--- a/src/effects/gradients/SkGradientShader.cpp
+++ b/src/effects/gradients/SkGradientShader.cpp
@@ -667,3 +667,69 @@
SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointRadialGradient)
SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointConicalGradient)
SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
+
+///////////////////////////////////////////////////////////////////////////////
+
+GrGLGradientStage::GrGLGradientStage(const GrProgramStageFactory& factory)
+ : INHERITED(factory) { }
+
+GrGLGradientStage::~GrGLGradientStage() { }
+
+void GrGLGradientStage::emitColorLookup(GrGLShaderBuilder* builder,
+ const char* tName,
+ const char* outputColor,
+ const char* samplerName) {
+ // Texture is effectively 1D so the y coordinate is 0.5, if we pack multiple
+ // gradients into a texture, we could instead pick the appropriate row here
+ builder->fSampleCoords.printf("vec2(%s, 0.5)", tName);
+ builder->fComplexCoord = true;
+ builder->emitDefaultFetch(outputColor, samplerName);
+}
+
+/////////////////////////////////////////////////////////////////////
+
+GrGradientEffect::GrGradientEffect(GrTexture* texture)
+ : fTexture (texture)
+ , fUseTexture(true) {
+ SkSafeRef(fTexture);
+}
+
+GrGradientEffect::GrGradientEffect(GrContext* ctx,
+ const SkShader& shader,
+ GrSamplerState* sampler)
+ : fTexture (NULL)
+ , fUseTexture (false) {
+ // TODO: check for simple cases where we don't need a texture:
+ //GradientInfo info;
+ //shader.asAGradient(&info);
+ //if (info.fColorCount == 2) { ...
+
+ SkBitmap bitmap;
+ shader.asABitmap(&bitmap, NULL, NULL);
+
+ GrContext::TextureCacheEntry entry = GrLockCachedBitmapTexture(ctx, bitmap,
+ sampler->textureParams());
+ fTexture = entry.texture();
+ SkSafeRef(fTexture);
+ fUseTexture = true;
+
+ // Unlock immediately, this is not great, but we don't have a way of
+ // knowing when else to unlock it currently, so it may get purged from
+ // the cache, but it'll still be ref'd until it's no longer being used.
+ GrUnlockCachedBitmapTexture(ctx, entry);
+}
+
+GrGradientEffect::~GrGradientEffect() {
+ SkSafeUnref(fTexture);
+}
+
+unsigned int GrGradientEffect::numTextures() const {
+ return fUseTexture ? 1 : 0;
+}
+
+GrTexture* GrGradientEffect::texture(unsigned int index)
+ const {
+ GrAssert(fUseTexture && 0 == index);
+ return fTexture;
+}
+