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// Copyright (c) 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 GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
#define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
#include <vector>
#include "base/containers/hash_tables.h"
#include "gpu/command_buffer/service/gl_utils.h"
#include "gpu/gpu_export.h"
namespace gpu {
namespace gles2 {
class GLES2Decoder;
} // namespace gles2.
// This class encapsulates the resources required to implement the
// GL_CHROMIUM_copy_texture extension. The copy operation is performed
// via glCopyTexImage2D() or a blit to a framebuffer object.
// The target of |dest_id| texture must be GL_TEXTURE_2D.
class GPU_EXPORT CopyTextureCHROMIUMResourceManager {
public:
CopyTextureCHROMIUMResourceManager();
~CopyTextureCHROMIUMResourceManager();
void Initialize(const gles2::GLES2Decoder* decoder);
void Destroy();
void DoCopyTexture(const gles2::GLES2Decoder* decoder,
GLenum source_target,
GLuint source_id,
GLenum source_internal_format,
GLuint dest_id,
GLenum dest_internal_format,
GLsizei width,
GLsizei height,
bool flip_y,
bool premultiply_alpha,
bool unpremultiply_alpha);
void DoCopySubTexture(const gles2::GLES2Decoder* decoder,
GLenum source_target,
GLuint source_id,
GLenum source_internal_format,
GLuint dest_id,
GLenum dest_internal_format,
GLint xoffset,
GLint yoffset,
GLsizei dest_width,
GLsizei dest_height,
GLsizei source_width,
GLsizei source_height,
bool flip_y,
bool premultiply_alpha,
bool unpremultiply_alpha);
// This will apply a transform on the source texture before copying to
// destination texture.
void DoCopyTextureWithTransform(const gles2::GLES2Decoder* decoder,
GLenum source_target,
GLuint source_id,
GLuint dest_id,
GLsizei width,
GLsizei height,
bool flip_y,
bool premultiply_alpha,
bool unpremultiply_alpha,
const GLfloat transform_matrix[16]);
void DoCopySubTextureWithTransform(const gles2::GLES2Decoder* decoder,
GLenum source_target,
GLuint source_id,
GLuint dest_id,
GLint xoffset,
GLint yoffset,
GLsizei dest_width,
GLsizei dest_height,
GLsizei source_width,
GLsizei source_height,
bool flip_y,
bool premultiply_alpha,
bool unpremultiply_alpha,
const GLfloat transform_matrix[16]);
// The attributes used during invocation of the extension.
static const GLuint kVertexPositionAttrib = 0;
private:
struct ProgramInfo {
ProgramInfo()
: program(0u),
matrix_handle(0u),
half_size_handle(0u),
sampler_handle(0u) {}
GLuint program;
GLuint matrix_handle;
GLuint half_size_handle;
GLuint sampler_handle;
};
void DoCopyTextureInternal(const gles2::GLES2Decoder* decoder,
GLenum source_target,
GLuint source_id,
GLuint dest_id,
GLint xoffset,
GLint yoffset,
GLsizei dest_width,
GLsizei dest_height,
GLsizei source_width,
GLsizei source_height,
bool flip_y,
bool premultiply_alpha,
bool unpremultiply_alpha,
const GLfloat transform_matrix[16]);
bool initialized_;
typedef std::vector<GLuint> ShaderVector;
ShaderVector vertex_shaders_;
ShaderVector fragment_shaders_;
typedef std::pair<int, int> ProgramMapKey;
typedef base::hash_map<ProgramMapKey, ProgramInfo> ProgramMap;
ProgramMap programs_;
GLuint buffer_id_;
GLuint framebuffer_;
DISALLOW_COPY_AND_ASSIGN(CopyTextureCHROMIUMResourceManager);
};
} // namespace gpu.
#endif // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
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