1741143878b23d22cd9cb7b9cba8055179115ce17msarett/* 2741143878b23d22cd9cb7b9cba8055179115ce17msarett * Copyright 2015 The Android Open Source Project 3741143878b23d22cd9cb7b9cba8055179115ce17msarett * 4741143878b23d22cd9cb7b9cba8055179115ce17msarett * Use of this source code is governed by a BSD-style license that can be 5741143878b23d22cd9cb7b9cba8055179115ce17msarett * found in the LICENSE file. 6741143878b23d22cd9cb7b9cba8055179115ce17msarett */ 7741143878b23d22cd9cb7b9cba8055179115ce17msarett 8741143878b23d22cd9cb7b9cba8055179115ce17msarett#ifndef SkCodecPriv_DEFINED 9741143878b23d22cd9cb7b9cba8055179115ce17msarett#define SkCodecPriv_DEFINED 10741143878b23d22cd9cb7b9cba8055179115ce17msarett 119e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett#include "SkColorTable.h" 12741143878b23d22cd9cb7b9cba8055179115ce17msarett#include "SkImageInfo.h" 13741143878b23d22cd9cb7b9cba8055179115ce17msarett#include "SkSwizzler.h" 14741143878b23d22cd9cb7b9cba8055179115ce17msarett#include "SkTypes.h" 159e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett#include "SkUtils.h" 16741143878b23d22cd9cb7b9cba8055179115ce17msarett 17741143878b23d22cd9cb7b9cba8055179115ce17msarett/* 18741143878b23d22cd9cb7b9cba8055179115ce17msarett * 19741143878b23d22cd9cb7b9cba8055179115ce17msarett * Helper routine for alpha result codes 20741143878b23d22cd9cb7b9cba8055179115ce17msarett * 21741143878b23d22cd9cb7b9cba8055179115ce17msarett */ 22741143878b23d22cd9cb7b9cba8055179115ce17msarett#define INIT_RESULT_ALPHA \ 23741143878b23d22cd9cb7b9cba8055179115ce17msarett uint8_t zeroAlpha = 0; \ 24741143878b23d22cd9cb7b9cba8055179115ce17msarett uint8_t maxAlpha = 0xFF; 25741143878b23d22cd9cb7b9cba8055179115ce17msarett 26741143878b23d22cd9cb7b9cba8055179115ce17msarett#define UPDATE_RESULT_ALPHA(alpha) \ 27741143878b23d22cd9cb7b9cba8055179115ce17msarett zeroAlpha |= (alpha); \ 28741143878b23d22cd9cb7b9cba8055179115ce17msarett maxAlpha &= (alpha); 29741143878b23d22cd9cb7b9cba8055179115ce17msarett 30741143878b23d22cd9cb7b9cba8055179115ce17msarett#define COMPUTE_RESULT_ALPHA \ 31741143878b23d22cd9cb7b9cba8055179115ce17msarett SkSwizzler::GetResult(zeroAlpha, maxAlpha); 32741143878b23d22cd9cb7b9cba8055179115ce17msarett 33741143878b23d22cd9cb7b9cba8055179115ce17msarett/* 34741143878b23d22cd9cb7b9cba8055179115ce17msarett * 359e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett * Copy the codec color table back to the client when kIndex8 color type is requested 369e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett * 379e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett */ 389e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarettstatic inline void copy_color_table(const SkImageInfo& dstInfo, SkColorTable* colorTable, 399e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett SkPMColor* inputColorPtr, int* inputColorCount) { 409e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett if (kIndex_8_SkColorType == dstInfo.colorType()) { 419e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett SkASSERT(NULL != inputColorPtr); 429e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett SkASSERT(NULL != inputColorCount); 439e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett SkASSERT(NULL != colorTable); 449e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett sk_memcpy32(inputColorPtr, colorTable->readColors(), *inputColorCount); 459e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett } 469e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett} 479e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett 489e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett/* 499e43cabaa1ff26167e990f0bcb9a5c20d662d52cmsarett * 50741143878b23d22cd9cb7b9cba8055179115ce17msarett * Compute row bytes for an image using pixels per byte 51741143878b23d22cd9cb7b9cba8055179115ce17msarett * 52741143878b23d22cd9cb7b9cba8055179115ce17msarett */ 53741143878b23d22cd9cb7b9cba8055179115ce17msarettstatic inline size_t compute_row_bytes_ppb(int width, uint32_t pixelsPerByte) { 54741143878b23d22cd9cb7b9cba8055179115ce17msarett return (width + pixelsPerByte - 1) / pixelsPerByte; 55741143878b23d22cd9cb7b9cba8055179115ce17msarett} 56741143878b23d22cd9cb7b9cba8055179115ce17msarett 57741143878b23d22cd9cb7b9cba8055179115ce17msarett/* 58741143878b23d22cd9cb7b9cba8055179115ce17msarett * 59741143878b23d22cd9cb7b9cba8055179115ce17msarett * Compute row bytes for an image using bytes per pixel 60741143878b23d22cd9cb7b9cba8055179115ce17msarett * 61741143878b23d22cd9cb7b9cba8055179115ce17msarett */ 62741143878b23d22cd9cb7b9cba8055179115ce17msarettstatic inline size_t compute_row_bytes_bpp(int width, uint32_t bytesPerPixel) { 63741143878b23d22cd9cb7b9cba8055179115ce17msarett return width * bytesPerPixel; 64741143878b23d22cd9cb7b9cba8055179115ce17msarett} 65741143878b23d22cd9cb7b9cba8055179115ce17msarett 66741143878b23d22cd9cb7b9cba8055179115ce17msarett/* 67741143878b23d22cd9cb7b9cba8055179115ce17msarett * 68741143878b23d22cd9cb7b9cba8055179115ce17msarett * Compute row bytes for an image 69741143878b23d22cd9cb7b9cba8055179115ce17msarett * 70741143878b23d22cd9cb7b9cba8055179115ce17msarett */ 71741143878b23d22cd9cb7b9cba8055179115ce17msarettstatic inline size_t compute_row_bytes(int width, uint32_t bitsPerPixel) { 72741143878b23d22cd9cb7b9cba8055179115ce17msarett if (bitsPerPixel < 16) { 73741143878b23d22cd9cb7b9cba8055179115ce17msarett SkASSERT(0 == 8 % bitsPerPixel); 74741143878b23d22cd9cb7b9cba8055179115ce17msarett const uint32_t pixelsPerByte = 8 / bitsPerPixel; 75741143878b23d22cd9cb7b9cba8055179115ce17msarett return compute_row_bytes_ppb(width, pixelsPerByte); 76741143878b23d22cd9cb7b9cba8055179115ce17msarett } else { 77741143878b23d22cd9cb7b9cba8055179115ce17msarett SkASSERT(0 == bitsPerPixel % 8); 78741143878b23d22cd9cb7b9cba8055179115ce17msarett const uint32_t bytesPerPixel = bitsPerPixel / 8; 79741143878b23d22cd9cb7b9cba8055179115ce17msarett return compute_row_bytes_bpp(width, bytesPerPixel); 80741143878b23d22cd9cb7b9cba8055179115ce17msarett } 81741143878b23d22cd9cb7b9cba8055179115ce17msarett} 82741143878b23d22cd9cb7b9cba8055179115ce17msarett 83741143878b23d22cd9cb7b9cba8055179115ce17msarett/* 84741143878b23d22cd9cb7b9cba8055179115ce17msarett * 85741143878b23d22cd9cb7b9cba8055179115ce17msarett * Get a byte from a buffer 86741143878b23d22cd9cb7b9cba8055179115ce17msarett * This method is unsafe, the caller is responsible for performing a check 87741143878b23d22cd9cb7b9cba8055179115ce17msarett * 88741143878b23d22cd9cb7b9cba8055179115ce17msarett */ 89741143878b23d22cd9cb7b9cba8055179115ce17msarettstatic inline uint8_t get_byte(uint8_t* buffer, uint32_t i) { 90741143878b23d22cd9cb7b9cba8055179115ce17msarett return buffer[i]; 91741143878b23d22cd9cb7b9cba8055179115ce17msarett} 92741143878b23d22cd9cb7b9cba8055179115ce17msarett 93741143878b23d22cd9cb7b9cba8055179115ce17msarett/* 94741143878b23d22cd9cb7b9cba8055179115ce17msarett * 95741143878b23d22cd9cb7b9cba8055179115ce17msarett * Get a short from a buffer 96741143878b23d22cd9cb7b9cba8055179115ce17msarett * This method is unsafe, the caller is responsible for performing a check 97741143878b23d22cd9cb7b9cba8055179115ce17msarett * 98741143878b23d22cd9cb7b9cba8055179115ce17msarett */ 99741143878b23d22cd9cb7b9cba8055179115ce17msarettstatic inline uint16_t get_short(uint8_t* buffer, uint32_t i) { 100741143878b23d22cd9cb7b9cba8055179115ce17msarett uint16_t result; 101741143878b23d22cd9cb7b9cba8055179115ce17msarett memcpy(&result, &(buffer[i]), 2); 102741143878b23d22cd9cb7b9cba8055179115ce17msarett#ifdef SK_CPU_BENDIAN 103741143878b23d22cd9cb7b9cba8055179115ce17msarett return SkEndianSwap16(result); 104741143878b23d22cd9cb7b9cba8055179115ce17msarett#else 105741143878b23d22cd9cb7b9cba8055179115ce17msarett return result; 106741143878b23d22cd9cb7b9cba8055179115ce17msarett#endif 107741143878b23d22cd9cb7b9cba8055179115ce17msarett} 108741143878b23d22cd9cb7b9cba8055179115ce17msarett 109741143878b23d22cd9cb7b9cba8055179115ce17msarett/* 110741143878b23d22cd9cb7b9cba8055179115ce17msarett * 111741143878b23d22cd9cb7b9cba8055179115ce17msarett * Get an int from a buffer 112741143878b23d22cd9cb7b9cba8055179115ce17msarett * This method is unsafe, the caller is responsible for performing a check 113741143878b23d22cd9cb7b9cba8055179115ce17msarett * 114741143878b23d22cd9cb7b9cba8055179115ce17msarett */ 115741143878b23d22cd9cb7b9cba8055179115ce17msarettstatic inline uint32_t get_int(uint8_t* buffer, uint32_t i) { 116741143878b23d22cd9cb7b9cba8055179115ce17msarett uint32_t result; 117741143878b23d22cd9cb7b9cba8055179115ce17msarett memcpy(&result, &(buffer[i]), 4); 118741143878b23d22cd9cb7b9cba8055179115ce17msarett#ifdef SK_CPU_BENDIAN 119741143878b23d22cd9cb7b9cba8055179115ce17msarett return SkEndianSwap32(result); 120741143878b23d22cd9cb7b9cba8055179115ce17msarett#else 121741143878b23d22cd9cb7b9cba8055179115ce17msarett return result; 122741143878b23d22cd9cb7b9cba8055179115ce17msarett#endif 123741143878b23d22cd9cb7b9cba8055179115ce17msarett} 124741143878b23d22cd9cb7b9cba8055179115ce17msarett 125230d4ac7013f79a3e79efd4452d7fa5c3f508660scroggo#ifdef SK_PRINT_CODEC_MESSAGES 126230d4ac7013f79a3e79efd4452d7fa5c3f508660scroggo #define SkCodecPrintf SkDebugf 127230d4ac7013f79a3e79efd4452d7fa5c3f508660scroggo#else 128230d4ac7013f79a3e79efd4452d7fa5c3f508660scroggo #define SkCodecPrintf(...) 129230d4ac7013f79a3e79efd4452d7fa5c3f508660scroggo#endif 130230d4ac7013f79a3e79efd4452d7fa5c3f508660scroggo 131741143878b23d22cd9cb7b9cba8055179115ce17msarett#endif // SkCodecPriv_DEFINED 132