Remove default implementation of GrEffect::isEqual. Make GrSingleTextureEffect abstract.

Review URL: https://codereview.appspot.com/7142049

git-svn-id: http://skia.googlecode.com/svn/trunk@7254 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 67 insertions, 0 deletions

diff --git a/src/gpu/effects/GrSimpleTextureEffect.h b/src/gpu/effects/GrSimpleTextureEffect.h
new file mode 100644
index 0000000000..5ccbe33497
--- /dev/null
+++ b/src/gpu/effects/GrSimpleTextureEffect.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrSimpleTextureEffect_DEFINED
+#define GrSimpleTextureEffect_DEFINED
+
+#include "GrSingleTextureEffect.h"
+
+class GrGLSimpleTextureEffect;
+
+/**
+ * The output color of this effect is a modulation of the input color and a sample from a texture.
+ * The coord to sample the texture is determine by a matrix. It allows explicit specification of
+ * the filtering and wrap modes (GrTextureParams).
+ */
+class GrSimpleTextureEffect : public GrSingleTextureEffect {
+public:
+    /* unfiltered, clamp mode */
+    static GrEffectRef* Create(GrTexture* tex, const SkMatrix& matrix) {
+        SkAutoTUnref<GrEffect> effect(SkNEW_ARGS(GrSimpleTextureEffect, (tex, matrix)));
+        return CreateEffectRef(effect);
+    }
+
+    /* clamp mode */
+    static GrEffectRef* Create(GrTexture* tex, const SkMatrix& matrix, bool bilerp) {
+        SkAutoTUnref<GrEffect> effect(SkNEW_ARGS(GrSimpleTextureEffect, (tex, matrix, bilerp)));
+        return CreateEffectRef(effect);
+    }
+
+    static GrEffectRef* Create(GrTexture* tex, const SkMatrix& matrix, const GrTextureParams& p) {
+        SkAutoTUnref<GrEffect> effect(SkNEW_ARGS(GrSimpleTextureEffect, (tex, matrix, p)));
+        return CreateEffectRef(effect);
+    }
+
+    virtual ~GrSimpleTextureEffect() {}
+
+    static const char* Name() { return "Texture"; }
+
+    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
+
+    typedef GrGLSimpleTextureEffect GLEffect;
+
+    virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE;
+
+private:
+    GrSimpleTextureEffect(GrTexture* texture, const SkMatrix& matrix)
+        : GrSingleTextureEffect(texture, matrix) {}
+    GrSimpleTextureEffect(GrTexture* texture, const SkMatrix& matrix, bool bilerp)
+        : GrSingleTextureEffect(texture, matrix, bilerp) {}
+    GrSimpleTextureEffect(GrTexture* texture, const SkMatrix& matrix, const GrTextureParams& params)
+        : GrSingleTextureEffect(texture, matrix, params) {}
+
+    virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE {
+        const GrSimpleTextureEffect& ste = static_cast<const GrSimpleTextureEffect&>(other);
+        return this->hasSameTextureParamsAndMatrix(ste);
+    }
+
+    GR_DECLARE_EFFECT_TEST;
+
+    typedef GrSingleTextureEffect INHERITED;
+};
+
+#endif