Benchmark tool for GPU-accelerated video rendering

media/tools/shader_bench/gpu_painter.h

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_TOOLS_SHADER_BENCH_GPU_PAINTER_H_
+#define MEDIA_TOOLS_SHADER_BENCH_GPU_PAINTER_H_
+
+#include "app/gfx/gl/gl_bindings.h"
+#include "app/gfx/gl/gl_context.h"
+#include "app/gfx/gl/gl_implementation.h"
+#include "media/tools/shader_bench/painter.h"
+
+// Class that renders video frames to a window via GPU.
+class GPUPainter : public Painter {
+ public:
+  GPUPainter();
+  virtual ~GPUPainter();
+
+  // Returns a reference to the GL context.
+  gfx::GLContext* context() const { return context_; }
+
+  // Sets context for subsequent gl calls in this painter.
+  virtual void SetGLContext(gfx::GLContext* context);
+
+  // Creates shader program into given context, from the vertex and fragment
+  // shader source code. Returns the id of the shader program.
+  virtual GLuint CreateShaderProgram(const char* vertex_shader_source,
+                                     const char* fragment_shader_source);
+
+ private:
+  // Loads shader into given context, from the source code of the
+  // shader. type refers to the shader type, either GL_VERTEX_SHADER or
+  // GL_FRAGMENT_SHADER. Returns id of shader.
+  GLuint LoadShader(unsigned type, const char* shader_source);
+
+  // Reference to the gl context.
+  gfx::GLContext* context_;
+
+  DISALLOW_COPY_AND_ASSIGN(GPUPainter);
+};
+
+#endif  // MEDIA_TOOLS_SHADER_BENCH_GPU_PAINTER_H_