The Tor Browser / file comparison
comparison: gfx/2d/DataSurfaceHelpers.h
gfx/2d/DataSurfaceHelpers.h
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- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:a2cd79850cca |
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| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef _MOZILLA_GFX_DATASURFACEHELPERS_H | |
| 7 #define _MOZILLA_GFX_DATASURFACEHELPERS_H | |
| 8 | |
| 9 #include "2D.h" | |
| 10 | |
| 11 namespace mozilla { | |
| 12 namespace gfx { | |
| 13 | |
| 14 void | |
| 15 ConvertBGRXToBGRA(uint8_t* aData, const IntSize &aSize, int32_t aStride); | |
| 16 | |
| 17 /** | |
| 18 * Copy the pixel data from aSrc and pack it into aDst. aSrcSize, aSrcStride | |
| 19 * and aBytesPerPixel give the size, stride and bytes per pixel for aSrc's | |
| 20 * surface. Callers are responsible for making sure that aDst is big enough to | |
| 21 * contain |aSrcSize.width * aSrcSize.height * aBytesPerPixel| bytes. | |
| 22 */ | |
| 23 void | |
| 24 CopySurfaceDataToPackedArray(uint8_t* aSrc, uint8_t* aDst, IntSize aSrcSize, | |
| 25 int32_t aSrcStride, int32_t aBytesPerPixel); | |
| 26 | |
| 27 /** | |
| 28 * Convert aSurface to a packed buffer in BGRA format. The pixel data is | |
| 29 * returned in a buffer allocated with new uint8_t[]. The caller then has | |
| 30 * ownership of the buffer and is responsible for delete[]'ing it. | |
| 31 */ | |
| 32 uint8_t* | |
| 33 SurfaceToPackedBGRA(DataSourceSurface *aSurface); | |
| 34 | |
| 35 /** | |
| 36 * Convert aSurface to a packed buffer in BGR format. The pixel data is | |
| 37 * returned in a buffer allocated with new uint8_t[]. The caller then has | |
| 38 * ownership of the buffer and is responsible for delete[]'ing it. | |
| 39 * | |
| 40 * This function is currently only intended for use with surfaces of format | |
| 41 * SurfaceFormat::B8G8R8X8 since the X components of the pixel data (if any) | |
| 42 * are simply dropped (no attempt is made to un-pre-multiply alpha from the | |
| 43 * color components). | |
| 44 */ | |
| 45 uint8_t* | |
| 46 SurfaceToPackedBGR(DataSourceSurface *aSurface); | |
| 47 | |
| 48 /** | |
| 49 * Multiplies aStride and aHeight and makes sure the result is limited to | |
| 50 * something sane. To keep things consistent, this should always be used | |
| 51 * wherever we allocate a buffer based on surface stride and height. | |
| 52 * | |
| 53 * @param aExtra Optional argument to specify an additional number of trailing | |
| 54 * bytes (useful for creating intermediate surfaces for filters, for | |
| 55 * example). | |
| 56 * | |
| 57 * @return The result of the multiplication if it is acceptable, or else zero. | |
| 58 */ | |
| 59 size_t | |
| 60 BufferSizeFromStrideAndHeight(int32_t aStride, | |
| 61 int32_t aHeight, | |
| 62 int32_t aExtraBytes = 0); | |
| 63 | |
| 64 } | |
| 65 } | |
| 66 | |
| 67 #endif // _MOZILLA_GFX_DATASURFACEHELPERS_H |
