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//
// Copyright 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// BlitGL.h: Defines the BlitGL class, a helper for blitting textures
#ifndef LIBANGLE_RENDERER_GL_BLITGL_H_
#define LIBANGLE_RENDERER_GL_BLITGL_H_
#include "angle_gl.h"
#include "common/angleutils.h"
#include "libANGLE/angletypes.h"
#include "libANGLE/Error.h"
namespace gl
{
class Framebuffer;
}
namespace rx
{
class FramebufferGL;
class FunctionsGL;
class StateManagerGL;
struct WorkaroundsGL;
class BlitGL : public angle::NonCopyable
{
public:
BlitGL(const FunctionsGL *functions,
const WorkaroundsGL &workarounds,
StateManagerGL *stateManager);
~BlitGL();
gl::Error copyImageToLUMAWorkaroundTexture(GLuint texture,
GLenum textureType,
GLenum target,
GLenum lumaFormat,
size_t level,
const gl::Rectangle &sourceArea,
GLenum internalFormat,
const gl::Framebuffer *source);
gl::Error copySubImageToLUMAWorkaroundTexture(GLuint texture,
GLenum textureType,
GLenum target,
GLenum lumaFormat,
size_t level,
const gl::Offset &destOffset,
const gl::Rectangle &sourceArea,
const gl::Framebuffer *source);
gl::Error blitColorBufferWithShader(const gl::Framebuffer *source,
const gl::Framebuffer *dest,
const gl::Rectangle &sourceArea,
const gl::Rectangle &destArea,
GLenum filter);
gl::Error initializeResources();
private:
void orphanScratchTextures();
void setScratchTextureParameter(GLenum param, GLenum value);
const FunctionsGL *mFunctions;
const WorkaroundsGL &mWorkarounds;
StateManagerGL *mStateManager;
GLuint mBlitProgram;
GLint mSourceTextureLocation;
GLint mScaleLocation;
GLint mOffsetLocation;
GLuint mScratchTextures[2];
GLuint mScratchFBO;
GLuint mVAO;
};
}
#endif // LIBANGLE_RENDERER_GL_BLITGL_H_
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