gecko-dev/dom/canvas/TexUnpackBlob.h

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef TEX_UNPACK_BLOB_H_
#define TEX_UNPACK_BLOB_H_

#include "GLContextTypes.h"
#include "GLTypes.h"
#include "WebGLStrongTypes.h"


template <class T>
class RefPtr;

namespace mozilla {

class UniqueBuffer;
class WebGLContext;
class WebGLTexture;

namespace dom {
class Element;
class HTMLCanvasElement;
class HTMLVideoElement;
} // namespace dom

namespace gfx {
class DataSourceSurface;
} // namespace gfx

namespace gl {
class GLContext;
} // namespace gl

namespace layers {
class Image;
class ImageContainer;
} // namespace layers

namespace webgl {

struct PackingInfo;
struct DriverUnpackInfo;

class TexUnpackBlob
{
public:
    const uint32_t mAlignment;
    const uint32_t mRowLength;
    const uint32_t mImageHeight;
    const uint32_t mSkipPixels;
    const uint32_t mSkipRows;
    const uint32_t mSkipImages;
    const uint32_t mWidth;
    const uint32_t mHeight;
    const uint32_t mDepth;
    const bool mHasData;

protected:
    TexUnpackBlob(const WebGLContext* webgl, uint32_t alignment, uint32_t rowLength,
                  uint32_t imageHeight, uint32_t width, uint32_t height, uint32_t depth,
                  bool hasData);

public:
    virtual ~TexUnpackBlob() { }

    virtual bool TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
                                 WebGLTexture* tex, TexImageTarget target, GLint level,
                                 const webgl::DriverUnpackInfo* dui, GLint xOffset,
                                 GLint yOffset, GLint zOffset,
                                 GLenum* const out_error) const = 0;

    static void OriginsForDOM(WebGLContext* webgl, gl::OriginPos* const out_src,
                              gl::OriginPos* const out_dst);
};

class TexUnpackBytes : public TexUnpackBlob
{
public:
    const void* const mBytes;

    TexUnpackBytes(const WebGLContext* webgl, uint32_t width, uint32_t height,
                   uint32_t depth, const void* bytes);

    virtual bool TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
                                 WebGLTexture* tex, TexImageTarget target, GLint level,
                                 const webgl::DriverUnpackInfo* dui, GLint xOffset,
                                 GLint yOffset, GLint zOffset,
                                 GLenum* const out_error) const override;
};

class TexUnpackImage : public TexUnpackBlob
{
public:
    const RefPtr<layers::Image> mImage;
    const bool mIsAlphaPremult;

    TexUnpackImage(const WebGLContext* webgl, uint32_t imageHeight, uint32_t width,
                   uint32_t height, uint32_t depth, const RefPtr<layers::Image>& image,
                   bool isAlphaPremult);

    virtual bool TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
                                 WebGLTexture* tex, TexImageTarget target, GLint level,
                                 const webgl::DriverUnpackInfo* dui, GLint xOffset,
                                 GLint yOffset, GLint zOffset,
                                 GLenum* const out_error) const override;
};

class TexUnpackSurface : public TexUnpackBlob
{
public:
    const RefPtr<gfx::SourceSurface> mSurf;
    const bool mIsAlphaPremult;

    TexUnpackSurface(const WebGLContext* webgl, uint32_t imageHeight, uint32_t width,
                     uint32_t height, uint32_t depth, gfx::SourceSurface* surf,
                     bool isAlphaPremult);

    virtual bool TexOrSubImage(bool isSubImage, bool needsRespec, const char* funcName,
                                 WebGLTexture* tex, TexImageTarget target, GLint level,
                                 const webgl::DriverUnpackInfo* dui, GLint xOffset,
                                 GLint yOffset, GLint zOffset,
                                 GLenum* const out_error) const override;

protected:
    static bool ConvertSurface(WebGLContext* webgl, const webgl::DriverUnpackInfo* dui,
                               gfx::DataSourceSurface* surf, bool isSurfAlphaPremult,
                               UniqueBuffer* const out_convertedBuffer,
                               uint8_t* const out_convertedAlignment,
                               bool* const out_wasTrivial, bool* const out_outOfMemory);
    static bool UploadDataSurface(bool isSubImage, WebGLContext* webgl,
                                  TexImageTarget target, GLint level,
                                  const webgl::DriverUnpackInfo* dui, GLint xOffset,
                                  GLint yOffset, GLint zOffset, GLsizei width,
                                  GLsizei height, gfx::DataSourceSurface* surf,
                                  bool isSurfAlphaPremult, GLenum* const out_glError);
};

} // namespace webgl
} // namespace mozilla

#endif // TEX_UNPACK_BLOB_H_