// Copyright 2012 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 CC_OUTPUT_GL_RENDERER_DRAW_CACHE_H_
#define CC_OUTPUT_GL_RENDERER_DRAW_CACHE_H_
#include <vector>
#include "base/basictypes.h"
#include "third_party/skia/include/core/SkColor.h"
namespace cc {
// Collects 4 floats at a time for easy upload to GL.
struct Float4 {
float data[4];
};
// Collects 16 floats at a time for easy upload to GL.
struct Float16 {
float data[16];
};
// A cache for storing textured quads to be drawn. Stores the minimum required
// data to tell if two back to back draws only differ in their transform. Quads
// that only differ by transform may be coalesced into a single draw call.
struct TexturedQuadDrawCache {
TexturedQuadDrawCache();
~TexturedQuadDrawCache();
// Values tracked to determine if textured quads may be coalesced.
int program_id;
int resource_id;
bool needs_blending;
SkColor background_color;
// Information about the program binding that is required to draw.
int uv_xform_location;
int background_color_location;
int vertex_opacity_location;
int matrix_location;
int sampler_location;
// A cache for the coalesced quad data.
std::vector<Float4> uv_xform_data;
std::vector<float> vertex_opacity_data;
std::vector<Float16> matrix_data;
private:
DISALLOW_COPY_AND_ASSIGN(TexturedQuadDrawCache);
};
} // namespace cc
#endif // CC_OUTPUT_GL_RENDERER_DRAW_CACHE_H_