forked from mirrors/gecko-dev
126bd9e1a4
This patch was generated automatically by the "modeline.py" script, available here: https://github.com/amccreight/moz-source-tools/blob/master/modeline.py For every file that is modified in this patch, the changes are as follows: (1) The patch changes the file to use the exact C++ mode lines from the Mozilla coding style guide, available here: https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Coding_Style#Mode_Line (2) The patch deletes any blank lines between the mode line & the MPL boilerplate comment. (3) If the file previously had the mode lines and MPL boilerplate in a single contiguous C++ comment, then the patch splits them into separate C++ comments, to match the boilerplate in the coding style. MozReview-Commit-ID: 77D61xpSmIl --HG-- extra : rebase_source : c6162fa3cf539a07177a19838324bf368faa162b
148 lines
5.2 KiB
C++
148 lines
5.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _MOZILLA_GFX_DATASURFACEHELPERS_H
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#define _MOZILLA_GFX_DATASURFACEHELPERS_H
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#include "2D.h"
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#include "mozilla/UniquePtr.h"
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namespace mozilla {
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namespace gfx {
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int32_t
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StrideForFormatAndWidth(SurfaceFormat aFormat, int32_t aWidth);
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/**
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* Create a DataSourceSurface and init the surface with the |aData|. The stride
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* of this source surface might be different from the input data's |aDataStride|.
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* System will try to use the optimal one.
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*/
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already_AddRefed<DataSourceSurface>
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CreateDataSourceSurfaceFromData(const IntSize& aSize,
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SurfaceFormat aFormat,
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const uint8_t* aData,
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int32_t aDataStride);
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/**
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* Similar to CreateDataSourceSurfaceFromData(), but could setup the stride for
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* this surface.
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*/
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already_AddRefed<DataSourceSurface>
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CreateDataSourceSurfaceWithStrideFromData(const IntSize &aSize,
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SurfaceFormat aFormat,
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int32_t aStride,
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const uint8_t* aData,
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int32_t aDataStride);
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/**
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* Copy the pixel data from aSrc and pack it into aDst. aSrcSize, aSrcStride
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* and aBytesPerPixel give the size, stride and bytes per pixel for aSrc's
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* surface. Callers are responsible for making sure that aDst is big enough to
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* contain |aSrcSize.width * aSrcSize.height * aBytesPerPixel| bytes.
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*/
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void
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CopySurfaceDataToPackedArray(uint8_t* aSrc, uint8_t* aDst, IntSize aSrcSize,
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int32_t aSrcStride, int32_t aBytesPerPixel);
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/**
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* Convert aSurface to a packed buffer in BGRA format.
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*/
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UniquePtr<uint8_t[]>
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SurfaceToPackedBGRA(DataSourceSurface *aSurface);
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/**
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* Convert aSurface to a packed buffer in BGR format. The pixel data is
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* returned in a buffer allocated with new uint8_t[]. The caller then has
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* ownership of the buffer and is responsible for delete[]'ing it.
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*
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* This function is currently only intended for use with surfaces of format
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* SurfaceFormat::B8G8R8X8 since the X components of the pixel data (if any)
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* are simply dropped (no attempt is made to un-pre-multiply alpha from the
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* color components).
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*/
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uint8_t*
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SurfaceToPackedBGR(DataSourceSurface *aSurface);
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/**
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* Clears all the bytes in a DataSourceSurface's data array to zero (so to
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* transparent black for SurfaceFormat::B8G8R8A8, for example).
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* Note that DataSourceSurfaces can be initialized to zero, which is
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* more efficient than zeroing the surface after initialization.
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*/
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void
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ClearDataSourceSurface(DataSourceSurface *aSurface);
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/**
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* Multiplies aStride and aHeight and makes sure the result is limited to
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* something sane. To keep things consistent, this should always be used
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* wherever we allocate a buffer based on surface stride and height.
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*
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* @param aExtra Optional argument to specify an additional number of trailing
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* bytes (useful for creating intermediate surfaces for filters, for
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* example).
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*
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* @return The result of the multiplication if it is acceptable, or else zero.
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*/
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size_t
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BufferSizeFromStrideAndHeight(int32_t aStride,
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int32_t aHeight,
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int32_t aExtraBytes = 0);
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/**
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* Multiplies aWidth, aHeight, aDepth and makes sure the result is limited to
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* something sane. To keep things consistent, this should always be used
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* wherever we allocate a buffer based on surface dimensions.
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*
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* @param aExtra Optional argument to specify an additional number of trailing
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* bytes (useful for creating intermediate surfaces for filters, for
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* example).
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*
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* @return The result of the multiplication if it is acceptable, or else zero.
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*/
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size_t
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BufferSizeFromDimensions(int32_t aWidth,
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int32_t aHeight,
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int32_t aDepth,
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int32_t aExtraBytes = 0);
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/**
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* Copy aSrcRect from aSrc to aDest starting at aDestPoint.
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* @returns false if the copy is not successful or the aSrc's size is empty.
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*/
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bool
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CopyRect(DataSourceSurface* aSrc, DataSourceSurface* aDest,
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IntRect aSrcRect, IntPoint aDestPoint);
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/**
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* Create a non aliasing copy of aSource. This creates a new DataSourceSurface
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* using the factory and copies the bits.
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*
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* @return a dss allocated by Factory that contains a copy a aSource.
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*/
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already_AddRefed<DataSourceSurface>
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CreateDataSourceSurfaceByCloning(DataSourceSurface* aSource);
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/**
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* Return the byte at aPoint.
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*/
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uint8_t*
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DataAtOffset(DataSourceSurface* aSurface,
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const DataSourceSurface::MappedSurface* aMap,
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IntPoint aPoint);
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/**
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* Check if aPoint is contained by the surface.
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*
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* @returns true if and only if aPoint is inside the surface.
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*/
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bool
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SurfaceContainsPoint(SourceSurface* aSurface, const IntPoint& aPoint);
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} // namespace gfx
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} // namespace mozilla
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#endif // _MOZILLA_GFX_DATASURFACEHELPERS_H
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