The Tor Browser / file comparison
comparison: gfx/layers/BufferUnrotate.cpp
gfx/layers/BufferUnrotate.cpp
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
equal
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replaced
| -1:000000000000 | 0:4c86fd2f855e |
|---|---|
| 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 #include <algorithm> // min & max | |
| 7 #include <cstdlib> | |
| 8 #include <stdint.h> | |
| 9 #include <stdio.h> | |
| 10 #include <stdlib.h> | |
| 11 #include <string.h> | |
| 12 | |
| 13 void BufferUnrotate(uint8_t* aBuffer, int aByteWidth, int aHeight, | |
| 14 int aByteStride, int aXBoundary, int aYBoundary) | |
| 15 { | |
| 16 if (aXBoundary != 0) { | |
| 17 uint8_t* line = new uint8_t[aByteWidth]; | |
| 18 uint32_t smallStart = 0; | |
| 19 uint32_t smallLen = aXBoundary; | |
| 20 uint32_t smallDest = aByteWidth - aXBoundary; | |
| 21 uint32_t largeStart = aXBoundary; | |
| 22 uint32_t largeLen = aByteWidth - aXBoundary; | |
| 23 uint32_t largeDest = 0; | |
| 24 if (aXBoundary > aByteWidth / 2) { | |
| 25 smallStart = aXBoundary; | |
| 26 smallLen = aByteWidth - aXBoundary; | |
| 27 smallDest = 0; | |
| 28 largeStart = 0; | |
| 29 largeLen = aXBoundary; | |
| 30 largeDest = smallLen; | |
| 31 } | |
| 32 | |
| 33 for (int y = 0; y < aHeight; y++) { | |
| 34 int yOffset = y * aByteStride; | |
| 35 memcpy(line, &aBuffer[yOffset + smallStart], smallLen); | |
| 36 memmove(&aBuffer[yOffset + largeDest], &aBuffer[yOffset + largeStart], largeLen); | |
| 37 memcpy(&aBuffer[yOffset + smallDest], line, smallLen); | |
| 38 } | |
| 39 | |
| 40 delete[] line; | |
| 41 } | |
| 42 | |
| 43 if (aYBoundary != 0) { | |
| 44 uint32_t smallestHeight = std::min(aHeight - aYBoundary, aYBoundary); | |
| 45 uint32_t largestHeight = std::max(aHeight - aYBoundary, aYBoundary); | |
| 46 uint32_t smallOffset = 0; | |
| 47 uint32_t largeOffset = aYBoundary * aByteStride; | |
| 48 uint32_t largeDestOffset = 0; | |
| 49 uint32_t smallDestOffset = largestHeight * aByteStride; | |
| 50 if (aYBoundary > aHeight / 2) { | |
| 51 smallOffset = aYBoundary * aByteStride; | |
| 52 largeOffset = 0; | |
| 53 largeDestOffset = smallestHeight * aByteStride; | |
| 54 smallDestOffset = 0; | |
| 55 } | |
| 56 | |
| 57 uint8_t* smallestSide = new uint8_t[aByteStride * smallestHeight]; | |
| 58 memcpy(smallestSide, &aBuffer[smallOffset], aByteStride * smallestHeight); | |
| 59 memmove(&aBuffer[largeDestOffset], &aBuffer[largeOffset], aByteStride * largestHeight); | |
| 60 memcpy(&aBuffer[smallDestOffset], smallestSide, aByteStride * smallestHeight); | |
| 61 delete[] smallestSide; | |
| 62 } | |
| 63 } | |
| 64 |
