Program Listing for File opengl-framebuffer-guard.h

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#pragma once

#include <gpu-utility/opengl-context.h>
#include <dispatch-table/dispatch-table.h>

namespace gpa {
namespace gpu_utility {

struct ReadPixelGuard
{
    ReadPixelGuard(const GLContext& context, GLint packAligment = 4);
    ReadPixelGuard(ReadPixelGuard const&) = delete;
    ReadPixelGuard& operator=(ReadPixelGuard const&) = delete;
    ~ReadPixelGuard();

protected:
    const GLContext& mContext;

private:
    GLuint mOrigPixelPackBuffer = 0;
    GLint mDesiredPackAligment = 0;
    GLint mOrigPackSwapBytes = 0;
    GLint mOrigPackLsbFirst = 0;
    GLint mOrigPackAligment = 0;
    GLint mOrigPackRowLength = 0;
    GLint mOrigPackImageHeight = 0;
    GLint mOrigPackSkipPixels = 0;
    GLint mOrigPackSkipRows = 0;
    GLint mOrigPackSkipImages = 0;
    GLint mOrigPackRowBytesApple = 0;
};

struct OrigFramebufferGuard : public ReadPixelGuard
{
    OrigFramebufferGuard(const GLContext& context, GLint packAligment = 4);

    ~OrigFramebufferGuard();

private:
    GLenum mOverrideTarget = GL_FRAMEBUFFER;
    GLuint mOrigReadBuffer = 0;
    bool mIsES11 = false;
};

}  // namespace gpu_utility
}  // namespace gpa