/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* 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/. */
/** * Create a DataSourceSurface and init the surface with the |aData|. The stride * of this source surface might be different from the input data's * |aDataStride|. System will try to use the optimal one.
*/
already_AddRefed<DataSourceSurface> CreateDataSourceSurfaceFromData( const IntSize& aSize, SurfaceFormat aFormat, const uint8_t* aData,
int32_t aDataStride);
/** * Similar to CreateDataSourceSurfaceFromData(), but could setup the stride for * this surface.
*/
already_AddRefed<DataSourceSurface> CreateDataSourceSurfaceWithStrideFromData( const IntSize& aSize, SurfaceFormat aFormat, int32_t aStride, const uint8_t* aData, int32_t aDataStride);
/** * Copy the pixel data from aSrc and pack it into aDst. aSrcSize, aSrcStride * and aBytesPerPixel give the size, stride and bytes per pixel for aSrc's * surface. Callers are responsible for making sure that aDst is big enough to * contain |aSrcSize.width * aSrcSize.height * aBytesPerPixel| bytes.
*/ void CopySurfaceDataToPackedArray(uint8_t* aSrc, uint8_t* aDst,
IntSize aSrcSize, int32_t aSrcStride,
int32_t aBytesPerPixel);
/** * Convert aSurface to a packed buffer in BGRA format.
*/
UniquePtr<uint8_t[]> SurfaceToPackedBGRA(DataSourceSurface* aSurface);
/** * Convert aSurface to a packed buffer in BGR format. The pixel data is * returned in a buffer allocated with new uint8_t[]. The caller then has * ownership of the buffer and is responsible for delete[]'ing it. * * This function is currently only intended for use with surfaces of format * SurfaceFormat::B8G8R8X8 since the X components of the pixel data (if any) * are simply dropped (no attempt is made to un-pre-multiply alpha from the * color components).
*/
uint8_t* SurfaceToPackedBGR(DataSourceSurface* aSurface);
/** * Clears all the bytes in a DataSourceSurface's data array to zero (so to * transparent black for SurfaceFormat::B8G8R8A8, for example). * Note that DataSourceSurfaces can be initialized to zero, which is * more efficient than zeroing the surface after initialization.
*/ void ClearDataSourceSurface(DataSourceSurface* aSurface);
/** * Multiplies aStride and aHeight and makes sure the result is limited to * something sane. To keep things consistent, this should always be used * wherever we allocate a buffer based on surface stride and height. * * @param aExtra Optional argument to specify an additional number of trailing * bytes (useful for creating intermediate surfaces for filters, for * example). * * @return The result of the multiplication if it is acceptable, or else zero.
*/
size_t BufferSizeFromStrideAndHeight(int32_t aStride, int32_t aHeight,
int32_t aExtraBytes = 0);
/** * Multiplies aWidth, aHeight, aDepth and makes sure the result is limited to * something sane. To keep things consistent, this should always be used * wherever we allocate a buffer based on surface dimensions. * * @param aExtra Optional argument to specify an additional number of trailing * bytes (useful for creating intermediate surfaces for filters, for * example). * * @return The result of the multiplication if it is acceptable, or else zero.
*/
size_t BufferSizeFromDimensions(int32_t aWidth, int32_t aHeight, int32_t aDepth,
int32_t aExtraBytes = 0); /** * Copy aSrcRect from aSrc to aDest starting at aDestPoint. * @returns false if the copy is not successful or the aSrc's size is empty.
*/ bool CopyRect(DataSourceSurface* aSrc, DataSourceSurface* aDest,
IntRect aSrcRect, IntPoint aDestPoint);
/** * Create a non aliasing copy of aSource. This creates a new DataSourceSurface * using the factory and copies the bits. * * @return a dss allocated by Factory that contains a copy a aSource.
*/
already_AddRefed<DataSourceSurface> CreateDataSourceSurfaceByCloning(
DataSourceSurface* aSource);
/** * Return the byte at aPoint.
*/
uint8_t* DataAtOffset(DataSourceSurface* aSurface, const DataSourceSurface::MappedSurface* aMap,
IntPoint aPoint);
/** * Check if aPoint is contained by the surface. * * @returns true if and only if aPoint is inside the surface.
*/ bool SurfaceContainsPoint(SourceSurface* aSurface, const IntPoint& aPoint);
} // namespace gfx
} // namespace mozilla
#endif// _MOZILLA_GFX_DATASURFACEHELPERS_H
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