cleanup GLBenches

bench/GLBench.cpp

Index: bench/GLBench.cpp
diff --git a/bench/GLBench.cpp b/bench/GLBench.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b3bec74f774b969a504843ff38345322857e8410
--- /dev/null
+++ b/bench/GLBench.cpp
@@ -0,0 +1,174 @@
+/*
+ * 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 "GLBench.h"
+
+#if SK_SUPPORT_GPU
+#include "GrTest.h"
+#include <stdio.h>
+
+const GrGLContext* GLBench::getGLContext(SkCanvas* canvas) {
+    // This bench exclusively tests GL calls directly
+    if (NULL == canvas->getGrContext()) {
+        return NULL;
+    }
+    GrContext* context = canvas->getGrContext();
+
+    GrTestTarget tt;
+    context->getTestTarget(&tt);
+    if (!tt.target()) {
+        SkDebugf("Couldn't get Gr test target.");
+        return NULL;
+    }
+
+    const GrGLContext* ctx = tt.glContext();
+    if (!ctx) {
+        SkDebugf("Couldn't get an interface\n");
+        return NULL;
+    }
+
+    return this->onGetGLContext(ctx);
+}
+
+void GLBench::onPerCanvasPreDraw(SkCanvas* canvas) {
+    // This bench exclusively tests GL calls directly
+    const GrGLContext* ctx = this->getGLContext(canvas);
+    if (!ctx) {
+        return;
+    }
+    this->setup(ctx);
+}
+
+void GLBench::onPerCanvasPostDraw(SkCanvas* canvas) {
+    // This bench exclusively tests GL calls directly
+    const GrGLContext* ctx = this->getGLContext(canvas);
+    if (!ctx) {
+        return;
+    }
+    this->teardown(ctx->interface());
+}
+
+void GLBench::onDraw(const int loops, SkCanvas* canvas) {
+    const GrGLContext* ctx = this->getGLContext(canvas);
+    if (!ctx) {
+        return;
+    }
+    this->glDraw(loops, ctx);
+}
+
+GrGLuint GLBench::CompileShader(const GrGLInterface* gl, const char* shaderSrc, GrGLenum type) {
+    GrGLuint shader;
+    // Create the shader object
+    GR_GL_CALL_RET(gl, shader, CreateShader(type));
+
+    // Load the shader source
+    GR_GL_CALL(gl, ShaderSource(shader, 1, &shaderSrc, NULL));
+
+    // Compile the shader
+    GR_GL_CALL(gl, CompileShader(shader));
+
+    // Check for compile time errors
+    GrGLint success;
+    GrGLchar infoLog[512];
+    GR_GL_CALL(gl, GetShaderiv(shader, GR_GL_COMPILE_STATUS, &success));
+    if (!success) {
+        GR_GL_CALL(gl, GetShaderInfoLog(shader, 512, NULL, infoLog));
+        SkDebugf("ERROR::SHADER::COMPLIATION_FAILED: %s\n", infoLog);
+    }
+
+    return shader;
+}
+
+GrGLuint GLBench::CreateProgram(const GrGLInterface* gl, const char* vshader, const char* fshader) {
+
+    GrGLuint vertexShader = CompileShader(gl, vshader, GR_GL_VERTEX_SHADER);
+    GrGLuint fragmentShader = CompileShader(gl, fshader, GR_GL_FRAGMENT_SHADER);
+
+    GrGLuint shaderProgram;
+    GR_GL_CALL_RET(gl, shaderProgram, CreateProgram());
+    GR_GL_CALL(gl, AttachShader(shaderProgram, vertexShader));
+    GR_GL_CALL(gl, AttachShader(shaderProgram, fragmentShader));
+    GR_GL_CALL(gl, LinkProgram(shaderProgram));
+
+    // Check for linking errors
+    GrGLint success;
+    GrGLchar infoLog[512];
+    GR_GL_CALL(gl, GetProgramiv(shaderProgram, GR_GL_LINK_STATUS, &success));
+    if (!success) {
+        GR_GL_CALL(gl, GetProgramInfoLog(shaderProgram, 512, NULL, infoLog));
+        SkDebugf("Linker Error: %s\n", infoLog);
+    }
+    GR_GL_CALL(gl, DeleteShader(vertexShader));
+    GR_GL_CALL(gl, DeleteShader(fragmentShader));
+
+    return shaderProgram;
+}
+
+GrGLuint GLBench::SetupFramebuffer(const GrGLInterface* gl, int screenWidth, int screenHeight) {
+    //Setup framebuffer
+    GrGLuint texture;
+    GR_GL_CALL(gl, GenTextures(1, &texture));
+    GR_GL_CALL(gl, ActiveTexture(GR_GL_TEXTURE15));
+    GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, texture));
+    GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_MAG_FILTER, GR_GL_NEAREST));
+    GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_MIN_FILTER, GR_GL_NEAREST));
+    GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_WRAP_S, GR_GL_CLAMP_TO_EDGE));
+    GR_GL_CALL(gl, TexParameteri(GR_GL_TEXTURE_2D, GR_GL_TEXTURE_WRAP_T, GR_GL_CLAMP_TO_EDGE));
+    GR_GL_CALL(gl, TexImage2D(GR_GL_TEXTURE_2D,
+                              0, //level
+                              GR_GL_RGBA, //internal format
+                              screenWidth, // width
+                              screenHeight, // height
+                              0, //border
+                              GR_GL_RGBA, //format
+                              GR_GL_UNSIGNED_BYTE, // type
+                              NULL));
+
+    // bind framebuffer
+    GrGLuint framebuffer;
+    GR_GL_CALL(gl, BindTexture(GR_GL_TEXTURE_2D, 0));
+    GR_GL_CALL(gl, GenFramebuffers(1, &framebuffer));
+    GR_GL_CALL(gl, BindFramebuffer(GR_GL_FRAMEBUFFER, framebuffer));
+    GR_GL_CALL(gl, FramebufferTexture2D(GR_GL_FRAMEBUFFER,
+                                        GR_GL_COLOR_ATTACHMENT0,
+                                        GR_GL_TEXTURE_2D,
+                                        texture, 0));
+    GR_GL_CALL(gl, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
+    GR_GL_CALL(gl, Viewport(0, 0, screenWidth, screenHeight));
+    return texture;
+}
+
+
+void GLBench::DumpImage(const GrGLInterface* gl, uint32_t screenWidth, uint32_t screenHeight,
+                        const char* filename) {
+    // read back pixels
+    SkAutoTArray<uint32_t> readback(screenWidth * screenHeight);
+    GR_GL_CALL(gl, ReadPixels(0, // x
+                              0, // y
+                              screenWidth, // width
+                              screenHeight, // height
+                              GR_GL_RGBA, //format
+                              GR_GL_UNSIGNED_BYTE, //type
+                              readback.get()));
+
+    // dump png
+    SkBitmap bm;
+    if (!bm.tryAllocPixels(SkImageInfo::MakeN32Premul(screenWidth, screenHeight))) {
+        SkDebugf("couldn't allocate bitmap\n");
+        return;
+    }
+
+    bm.setPixels(readback.get());
+
+    if (!SkImageEncoder::EncodeFile(filename, bm, SkImageEncoder::kPNG_Type, 100)) {
+        SkDebugf("------ failed to encode %s\n", filename);
+        remove(filename);   // remove any partial file
+        return;
+    }
+}
+
+#endif