bench/GLVec4ScalarBench.cpp - skia - Git at Google

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "SkMatrix.h"
 #include "SkPoint.h"
 #include "SkString.h"

 #if SK_SUPPORT_GPU
 #include "GLBench.h"
 #include "gl/GrGLContext.h"
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLUtil.h"
 #include "glsl/GrGLSL.h"
 #include "glsl/GrGLSLCaps.h"
 #include "glsl/GrGLSLShaderVar.h"

 #include <stdio.h>

 /**
  * This is a GL benchmark for comparing the performance of using vec4 or float for coverage in GLSL.
  * The generated shader code from this bench will draw several overlapping circles, one in each
  * stage, to simulate coverage calculations.  The number of circles (i.e. the number of stages) can
  * be set as a parameter.
  */

 class GLVec4ScalarBench : public GLBench {
 public:
     /*
      * Use float or vec4 as GLSL data type for the output coverage
      */
     enum CoverageSetup {
         kUseScalar_CoverageSetup,
         kUseVec4_CoverageSetup,
     };

     /*
      * numStages determines the number of shader stages before the XP,
      * which consequently determines how many circles are drawn
      */
     GLVec4ScalarBench(CoverageSetup coverageSetup, uint32_t numStages)
         : fCoverageSetup(coverageSetup)
         , fNumStages(numStages)
         , fVboId(0)
         , fProgram(0) {
         fName = NumStagesSetupToStr(coverageSetup, numStages);
     }

 protected:
     const char* onGetName() override {
         return fName.c_str();
     }

     void setup(const GrGLContext*) override;
     void glDraw(int loops, const GrGLContext*) override;
     void teardown(const GrGLInterface*) override;

 private:
     void setupSingleVbo(const GrGLInterface*, const SkMatrix*);
     GrGLuint setupShader(const GrGLContext*);


     static SkString NumStagesSetupToStr(CoverageSetup coverageSetup, uint32_t numStages) {
         SkString name("GLVec4ScalarBench");
         switch (coverageSetup) {
             default:
             case kUseScalar_CoverageSetup:
                 name.appendf("_scalar_%u_stage", numStages);
                 break;
             case kUseVec4_CoverageSetup:
                 name.appendf("_vec4_%u_stage", numStages);
                 break;
         }
         return name;
     }

     static const GrGLuint kScreenWidth = 800;
     static const GrGLuint kScreenHeight = 600;
     static const uint32_t kNumTriPerDraw = 512;
     static const uint32_t kVerticesPerTri = 3;

     SkString fName;
     CoverageSetup fCoverageSetup;
     uint32_t fNumStages;
     GrGLuint fVboId;
     GrGLuint fProgram;
     GrGLuint fFboTextureId;
 };

 ///////////////////////////////////////////////////////////////////////////////////////////////////

 GrGLuint GLVec4ScalarBench::setupShader(const GrGLContext* ctx) {
     const GrGLSLCaps* glslCaps = ctx->caps()->glslCaps();
     const char* version = glslCaps->versionDeclString();

     // this shader draws fNumStages overlapping circles of increasing opacity (coverage) and
     // decreasing size, with the center of each subsequent circle closer to the bottom-right
     // corner of the screen than the previous circle.

     // set up vertex shader; this is a trivial vertex shader that passes through position and color
     GrGLSLShaderVar aPosition("a_position", kVec2f_GrSLType, GrShaderVar::kAttribute_TypeModifier);
     GrGLSLShaderVar oPosition("o_position", kVec2f_GrSLType, GrShaderVar::kVaryingOut_TypeModifier);
     GrGLSLShaderVar aColor("a_color", kVec3f_GrSLType, GrShaderVar::kAttribute_TypeModifier);
     GrGLSLShaderVar oColor("o_color", kVec3f_GrSLType, GrShaderVar::kVaryingOut_TypeModifier);

     SkString vshaderTxt(version);
     aPosition.appendDecl(glslCaps, &vshaderTxt);
     vshaderTxt.append(";\n");
     aColor.appendDecl(glslCaps, &vshaderTxt);
     vshaderTxt.append(";\n");
     oPosition.appendDecl(glslCaps, &vshaderTxt);
     vshaderTxt.append(";\n");
     oColor.appendDecl(glslCaps, &vshaderTxt);
     vshaderTxt.append(";\n");

     vshaderTxt.append(
             "void main()\n"
             "{\n"
             "    gl_Position = vec4(a_position, 0.0, 1.0);\n"
             "    o_position = a_position;\n"
             "    o_color = a_color;\n"
             "}\n");

     const GrGLInterface* gl = ctx->interface();

     // set up fragment shader; this fragment shader will have fNumStages coverage stages plus an
     // XP stage at the end.  Each coverage stage computes the pixel's distance from some hard-
     // coded center and compare that to some hard-coded circle radius to compute a coverage.
     // Then, this coverage is mixed with the coverage from the previous stage and passed to the
     // next stage.
     GrGLSLShaderVar oFragColor("o_FragColor", kVec4f_GrSLType, GrShaderVar::kOut_TypeModifier);
     SkString fshaderTxt(version);
     GrGLSLAppendDefaultFloatPrecisionDeclaration(kDefault_GrSLPrecision, *glslCaps, &fshaderTxt);
     oPosition.setTypeModifier(GrShaderVar::kVaryingIn_TypeModifier);
     oPosition.appendDecl(glslCaps, &fshaderTxt);
     fshaderTxt.append(";\n");
     oColor.setTypeModifier(GrShaderVar::kVaryingIn_TypeModifier);
     oColor.appendDecl(glslCaps, &fshaderTxt);
     fshaderTxt.append(";\n");

     const char* fsOutName;
     if (glslCaps->mustDeclareFragmentShaderOutput()) {
         oFragColor.appendDecl(glslCaps, &fshaderTxt);
         fshaderTxt.append(";\n");
         fsOutName = oFragColor.c_str();
     } else {
         fsOutName = "gl_FragColor";
     }


     fshaderTxt.appendf(
             "void main()\n"
             "{\n"
             "    vec4 outputColor;\n"
             "    %s outputCoverage;\n"
             "    outputColor = vec4(%s, 1.0);\n"
             "    outputCoverage = %s;\n",
             fCoverageSetup == kUseVec4_CoverageSetup ? "vec4" : "float",
             oColor.getName().c_str(),
             fCoverageSetup == kUseVec4_CoverageSetup ? "vec4(1.0)" : "1.0"
             );

     float radius = 1.0f;
     for (uint32_t i = 0; i < fNumStages; i++) {
         float centerX = 1.0f - radius;
         float centerY = 1.0f - radius;
         fshaderTxt.appendf(
             "    {\n"
             "        float d = length(%s - vec2(%f, %f));\n"
             "        float edgeAlpha = clamp(100.0 * (%f - d), 0.0, 1.0);\n"
             "        outputCoverage = 0.5 * outputCoverage + 0.5 * %s;\n"
             "    }\n",
             oPosition.getName().c_str(), centerX, centerY,
             radius,
             fCoverageSetup == kUseVec4_CoverageSetup ? "vec4(edgeAlpha)" : "edgeAlpha"
             );
         radius *= 0.8f;
     }
     fshaderTxt.appendf(
             "    {\n"
             "        %s = outputColor * outputCoverage;\n"
             "    }\n"
             "}\n",
             fsOutName);

     return CreateProgram(gl, vshaderTxt.c_str(), fshaderTxt.c_str());
 }

 template<typename Func>
 static void setup_matrices(int numQuads, Func f) {
     // We draw a really small triangle so we are not fill rate limited
     for (int i = 0 ; i < numQuads; i++) {
         SkMatrix m = SkMatrix::I();
         m.setScale(0.01f, 0.01f);
         f(m);
     }
 }

 ///////////////////////////////////////////////////////////////////////////////////////////////////

 struct Vertex {
     SkPoint fPositions;
     GrGLfloat fColors[3];
 };

 void GLVec4ScalarBench::setupSingleVbo(const GrGLInterface* gl, const SkMatrix* viewMatrices) {
     // triangles drawn will alternate between the top-right half of the screen and the bottom-left
     // half of the screen
     Vertex vertices[kVerticesPerTri * kNumTriPerDraw];
     for (uint32_t i = 0; i < kNumTriPerDraw; i++) {
         Vertex* v = &vertices[i * kVerticesPerTri];
         if (i % 2 == 0) {
             v[0].fPositions.set(-1.0f, -1.0f);
             v[1].fPositions.set( 1.0f, -1.0f);
             v[2].fPositions.set( 1.0f,  1.0f);
         } else {
             v[0].fPositions.set(-1.0f, -1.0f);
             v[1].fPositions.set( 1.0f, 1.0f);
             v[2].fPositions.set( -1.0f, 1.0f);
         }
         SkPoint* position = reinterpret_cast<SkPoint*>(v);
         viewMatrices[i].mapPointsWithStride(position, sizeof(Vertex), kVerticesPerTri);

         GrGLfloat color[3] = {1.0f, 0.0f, 1.0f};
         for (uint32_t j = 0; j < kVerticesPerTri; j++) {
             v->fColors[0] = color[0];
             v->fColors[1] = color[1];
             v->fColors[2] = color[2];
             v++;
         }
     }

     GR_GL_CALL(gl, GenBuffers(1, &fVboId));
     GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, fVboId));
     GR_GL_CALL(gl, EnableVertexAttribArray(0));
     GR_GL_CALL(gl, EnableVertexAttribArray(1));
     GR_GL_CALL(gl, VertexAttribPointer(0, 2, GR_GL_FLOAT, GR_GL_FALSE, sizeof(Vertex),
                                        (GrGLvoid*)0));
     GR_GL_CALL(gl, VertexAttribPointer(1, 3, GR_GL_FLOAT, GR_GL_FALSE, sizeof(Vertex),
                                        (GrGLvoid*)(sizeof(SkPoint))));
     GR_GL_CALL(gl, BufferData(GR_GL_ARRAY_BUFFER, sizeof(vertices), vertices, GR_GL_STATIC_DRAW));
 }

 void GLVec4ScalarBench::setup(const GrGLContext* ctx) {
     const GrGLInterface* gl = ctx->interface();
     if (!gl) {
         SkFAIL("GL interface is nullptr in setup()!\n");
     }
     fFboTextureId = SetupFramebuffer(gl, kScreenWidth, kScreenHeight);

     fProgram = this->setupShader(ctx);

     int index = 0;
     SkMatrix viewMatrices[kNumTriPerDraw];
     setup_matrices(kNumTriPerDraw, [&index, &viewMatrices](const SkMatrix& m) {
         viewMatrices[index++] = m;
     });
     this->setupSingleVbo(gl, viewMatrices);

     GR_GL_CALL(gl, UseProgram(fProgram));
 }

 void GLVec4ScalarBench::glDraw(int loops, const GrGLContext* ctx) {
     const GrGLInterface* gl = ctx->interface();

     for (int i = 0; i < loops; i++) {
         GR_GL_CALL(gl, DrawArrays(GR_GL_TRIANGLES, 0, kVerticesPerTri * kNumTriPerDraw));
     }

 // using -w when running nanobench will not produce correct images;
 // changing this to #if 1 will write the correct images to the Skia folder.
 #if 0
     SkString filename("out");
     filename.appendf("_%s.png", this->getName());
     DumpImage(gl, kScreenWidth, kScreenHeight, filename.c_str());
 #endif
 }

 void GLVec4ScalarBench::teardown(const GrGLInterface* gl) {
     GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, 0));
     GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, 0));
     GR_GL_CALL(gl, BindFramebuffer(GR_GL_FRAMEBUFFER, 0));
     GR_GL_CALL(gl, DeleteTextures(1, &fFboTextureId));
     GR_GL_CALL(gl, DeleteProgram(fProgram));
     GR_GL_CALL(gl, DeleteBuffers(1, &fVboId));
 }

 ///////////////////////////////////////////////////////////////////////////////

 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 1) )
 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 1) )
 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 2) )
 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 2) )
 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 4) )
 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 4) )
 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 6) )
 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 6) )
 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 8) )
 DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 8) )

 #endif
	/*
	* Copyright 2015 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "SkMatrix.h"
	#include "SkPoint.h"
	#include "SkString.h"

	#if SK_SUPPORT_GPU
	#include "GLBench.h"
	#include "gl/GrGLContext.h"
	#include "gl/GrGLInterface.h"
	#include "gl/GrGLUtil.h"
	#include "glsl/GrGLSL.h"
	#include "glsl/GrGLSLCaps.h"
	#include "glsl/GrGLSLShaderVar.h"

	#include <stdio.h>

	/**
	* This is a GL benchmark for comparing the performance of using vec4 or float for coverage in GLSL.
	* The generated shader code from this bench will draw several overlapping circles, one in each
	* stage, to simulate coverage calculations. The number of circles (i.e. the number of stages) can
	* be set as a parameter.
	*/

	class GLVec4ScalarBench : public GLBench {
	public:
	/*
	* Use float or vec4 as GLSL data type for the output coverage
	*/
	enum CoverageSetup {
	kUseScalar_CoverageSetup,
	kUseVec4_CoverageSetup,
	};

	/*
	* numStages determines the number of shader stages before the XP,
	* which consequently determines how many circles are drawn
	*/
	GLVec4ScalarBench(CoverageSetup coverageSetup, uint32_t numStages)
	: fCoverageSetup(coverageSetup)
	, fNumStages(numStages)
	, fVboId(0)
	, fProgram(0) {
	fName = NumStagesSetupToStr(coverageSetup, numStages);
	}

	protected:
	const char* onGetName() override {
	return fName.c_str();
	}

	void setup(const GrGLContext*) override;
	void glDraw(int loops, const GrGLContext*) override;
	void teardown(const GrGLInterface*) override;

	private:
	void setupSingleVbo(const GrGLInterface, const SkMatrix);
	GrGLuint setupShader(const GrGLContext*);


	static SkString NumStagesSetupToStr(CoverageSetup coverageSetup, uint32_t numStages) {
	SkString name("GLVec4ScalarBench");
	switch (coverageSetup) {
	default:
	case kUseScalar_CoverageSetup:
	name.appendf("_scalar_%u_stage", numStages);
	break;
	case kUseVec4_CoverageSetup:
	name.appendf("_vec4_%u_stage", numStages);
	break;
	}
	return name;
	}

	static const GrGLuint kScreenWidth = 800;
	static const GrGLuint kScreenHeight = 600;
	static const uint32_t kNumTriPerDraw = 512;
	static const uint32_t kVerticesPerTri = 3;

	SkString fName;
	CoverageSetup fCoverageSetup;
	uint32_t fNumStages;
	GrGLuint fVboId;
	GrGLuint fProgram;
	GrGLuint fFboTextureId;
	};

	///////////////////////////////////////////////////////////////////////////////////////////////////

	GrGLuint GLVec4ScalarBench::setupShader(const GrGLContext* ctx) {
	const GrGLSLCaps* glslCaps = ctx->caps()->glslCaps();
	const char* version = glslCaps->versionDeclString();

	// this shader draws fNumStages overlapping circles of increasing opacity (coverage) and
	// decreasing size, with the center of each subsequent circle closer to the bottom-right
	// corner of the screen than the previous circle.

	// set up vertex shader; this is a trivial vertex shader that passes through position and color
	GrGLSLShaderVar aPosition("a_position", kVec2f_GrSLType, GrShaderVar::kAttribute_TypeModifier);
	GrGLSLShaderVar oPosition("o_position", kVec2f_GrSLType, GrShaderVar::kVaryingOut_TypeModifier);
	GrGLSLShaderVar aColor("a_color", kVec3f_GrSLType, GrShaderVar::kAttribute_TypeModifier);
	GrGLSLShaderVar oColor("o_color", kVec3f_GrSLType, GrShaderVar::kVaryingOut_TypeModifier);

	SkString vshaderTxt(version);
	aPosition.appendDecl(glslCaps, &vshaderTxt);
	vshaderTxt.append(";\n");
	aColor.appendDecl(glslCaps, &vshaderTxt);
	vshaderTxt.append(";\n");
	oPosition.appendDecl(glslCaps, &vshaderTxt);
	vshaderTxt.append(";\n");
	oColor.appendDecl(glslCaps, &vshaderTxt);
	vshaderTxt.append(";\n");

	vshaderTxt.append(
	"void main()\n"
	"{\n"
	" gl_Position = vec4(a_position, 0.0, 1.0);\n"
	" o_position = a_position;\n"
	" o_color = a_color;\n"
	"}\n");

	const GrGLInterface* gl = ctx->interface();

	// set up fragment shader; this fragment shader will have fNumStages coverage stages plus an
	// XP stage at the end. Each coverage stage computes the pixel's distance from some hard-
	// coded center and compare that to some hard-coded circle radius to compute a coverage.
	// Then, this coverage is mixed with the coverage from the previous stage and passed to the
	// next stage.
	GrGLSLShaderVar oFragColor("o_FragColor", kVec4f_GrSLType, GrShaderVar::kOut_TypeModifier);
	SkString fshaderTxt(version);
	GrGLSLAppendDefaultFloatPrecisionDeclaration(kDefault_GrSLPrecision, *glslCaps, &fshaderTxt);
	oPosition.setTypeModifier(GrShaderVar::kVaryingIn_TypeModifier);
	oPosition.appendDecl(glslCaps, &fshaderTxt);
	fshaderTxt.append(";\n");
	oColor.setTypeModifier(GrShaderVar::kVaryingIn_TypeModifier);
	oColor.appendDecl(glslCaps, &fshaderTxt);
	fshaderTxt.append(";\n");

	const char* fsOutName;
	if (glslCaps->mustDeclareFragmentShaderOutput()) {
	oFragColor.appendDecl(glslCaps, &fshaderTxt);
	fshaderTxt.append(";\n");
	fsOutName = oFragColor.c_str();
	} else {
	fsOutName = "gl_FragColor";
	}


	fshaderTxt.appendf(
	"void main()\n"
	"{\n"
	" vec4 outputColor;\n"
	" %s outputCoverage;\n"
	" outputColor = vec4(%s, 1.0);\n"
	" outputCoverage = %s;\n",
	fCoverageSetup == kUseVec4_CoverageSetup ? "vec4" : "float",
	oColor.getName().c_str(),
	fCoverageSetup == kUseVec4_CoverageSetup ? "vec4(1.0)" : "1.0"
	);

	float radius = 1.0f;
	for (uint32_t i = 0; i < fNumStages; i++) {
	float centerX = 1.0f - radius;
	float centerY = 1.0f - radius;
	fshaderTxt.appendf(
	" {\n"
	" float d = length(%s - vec2(%f, %f));\n"
	" float edgeAlpha = clamp(100.0 * (%f - d), 0.0, 1.0);\n"
	" outputCoverage = 0.5 * outputCoverage + 0.5 * %s;\n"
	" }\n",
	oPosition.getName().c_str(), centerX, centerY,
	radius,
	fCoverageSetup == kUseVec4_CoverageSetup ? "vec4(edgeAlpha)" : "edgeAlpha"
	);
	radius *= 0.8f;
	}
	fshaderTxt.appendf(
	" {\n"
	" %s = outputColor * outputCoverage;\n"
	" }\n"
	"}\n",
	fsOutName);

	return CreateProgram(gl, vshaderTxt.c_str(), fshaderTxt.c_str());
	}

	template<typename Func>
	static void setup_matrices(int numQuads, Func f) {
	// We draw a really small triangle so we are not fill rate limited
	for (int i = 0 ; i < numQuads; i++) {
	SkMatrix m = SkMatrix::I();
	m.setScale(0.01f, 0.01f);
	f(m);
	}
	}

	///////////////////////////////////////////////////////////////////////////////////////////////////

	struct Vertex {
	SkPoint fPositions;
	GrGLfloat fColors[3];
	};

	void GLVec4ScalarBench::setupSingleVbo(const GrGLInterface* gl, const SkMatrix* viewMatrices) {
	// triangles drawn will alternate between the top-right half of the screen and the bottom-left
	// half of the screen
	Vertex vertices[kVerticesPerTri * kNumTriPerDraw];
	for (uint32_t i = 0; i < kNumTriPerDraw; i++) {
	Vertex* v = &vertices[i * kVerticesPerTri];
	if (i % 2 == 0) {
	v[0].fPositions.set(-1.0f, -1.0f);
	v[1].fPositions.set( 1.0f, -1.0f);
	v[2].fPositions.set( 1.0f, 1.0f);
	} else {
	v[0].fPositions.set(-1.0f, -1.0f);
	v[1].fPositions.set( 1.0f, 1.0f);
	v[2].fPositions.set( -1.0f, 1.0f);
	}
	SkPoint* position = reinterpret_cast<SkPoint*>(v);
	viewMatrices[i].mapPointsWithStride(position, sizeof(Vertex), kVerticesPerTri);

	GrGLfloat color[3] = {1.0f, 0.0f, 1.0f};
	for (uint32_t j = 0; j < kVerticesPerTri; j++) {
	v->fColors[0] = color[0];
	v->fColors[1] = color[1];
	v->fColors[2] = color[2];
	v++;
	}
	}

	GR_GL_CALL(gl, GenBuffers(1, &fVboId));
	GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, fVboId));
	GR_GL_CALL(gl, EnableVertexAttribArray(0));
	GR_GL_CALL(gl, EnableVertexAttribArray(1));
	GR_GL_CALL(gl, VertexAttribPointer(0, 2, GR_GL_FLOAT, GR_GL_FALSE, sizeof(Vertex),
	(GrGLvoid*)0));
	GR_GL_CALL(gl, VertexAttribPointer(1, 3, GR_GL_FLOAT, GR_GL_FALSE, sizeof(Vertex),
	(GrGLvoid*)(sizeof(SkPoint))));
	GR_GL_CALL(gl, BufferData(GR_GL_ARRAY_BUFFER, sizeof(vertices), vertices, GR_GL_STATIC_DRAW));
	}

	void GLVec4ScalarBench::setup(const GrGLContext* ctx) {
	const GrGLInterface* gl = ctx->interface();
	if (!gl) {
	SkFAIL("GL interface is nullptr in setup()!\n");
	}
	fFboTextureId = SetupFramebuffer(gl, kScreenWidth, kScreenHeight);

	fProgram = this->setupShader(ctx);

	int index = 0;
	SkMatrix viewMatrices[kNumTriPerDraw];
	setup_matrices(kNumTriPerDraw, [&index, &viewMatrices](const SkMatrix& m) {
	viewMatrices[index++] = m;
	});
	this->setupSingleVbo(gl, viewMatrices);

	GR_GL_CALL(gl, UseProgram(fProgram));
	}

	void GLVec4ScalarBench::glDraw(int loops, const GrGLContext* ctx) {
	const GrGLInterface* gl = ctx->interface();

	for (int i = 0; i < loops; i++) {
	GR_GL_CALL(gl, DrawArrays(GR_GL_TRIANGLES, 0, kVerticesPerTri * kNumTriPerDraw));
	}

	// using -w when running nanobench will not produce correct images;
	// changing this to #if 1 will write the correct images to the Skia folder.
	#if 0
	SkString filename("out");
	filename.appendf("_%s.png", this->getName());
	DumpImage(gl, kScreenWidth, kScreenHeight, filename.c_str());
	#endif
	}

	void GLVec4ScalarBench::teardown(const GrGLInterface* gl) {
	GR_GL_CALL(gl, BindBuffer(GR_GL_ARRAY_BUFFER, 0));
	GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, 0));
	GR_GL_CALL(gl, BindFramebuffer(GR_GL_FRAMEBUFFER, 0));
	GR_GL_CALL(gl, DeleteTextures(1, &fFboTextureId));
	GR_GL_CALL(gl, DeleteProgram(fProgram));
	GR_GL_CALL(gl, DeleteBuffers(1, &fVboId));
	}

	///////////////////////////////////////////////////////////////////////////////

	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 1) )
	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 1) )
	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 2) )
	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 2) )
	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 4) )
	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 4) )
	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 6) )
	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 6) )
	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseScalar_CoverageSetup, 8) )
	DEF_BENCH( return new GLVec4ScalarBench(GLVec4ScalarBench::kUseVec4_CoverageSetup, 8) )

	#endif