1fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 2fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Copyright 2015 The Android Open Source Project 3fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * 4fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Use of this source code is governed by a BSD-style license that can be 5fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * found in the LICENSE file. 6fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 7fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 8fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#ifndef SkCodecPriv_DEFINED 9fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#define SkCodecPriv_DEFINED 10fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 11fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkColorData.h" 12fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkColorSpaceXform.h" 13fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkColorSpaceXformPriv.h" 14fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkColorTable.h" 15fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkEncodedInfo.h" 16fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkEncodedOrigin.h" 17fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkImageInfo.h" 18fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#include "SkTypes.h" 19fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 20fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#ifdef SK_PRINT_CODEC_MESSAGES 21fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot #define SkCodecPrintf SkDebugf 22fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#else 23fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot #define SkCodecPrintf(...) 24fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#endif 25fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 26fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot// FIXME: Consider sharing with dm, nanbench, and tools. 27fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline float get_scale_from_sample_size(int sampleSize) { 28fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return 1.0f / ((float) sampleSize); 29fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 30fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 31fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline bool is_valid_subset(const SkIRect& subset, const SkISize& imageDims) { 32fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return SkIRect::MakeSize(imageDims).contains(subset); 33fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 34fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 35fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 36fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * returns a scaled dimension based on the original dimension and the sampleSize 37fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * NOTE: we round down here for scaled dimension to match the behavior of SkImageDecoder 38fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * FIXME: I think we should call this get_sampled_dimension(). 39fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 40fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline int get_scaled_dimension(int srcDimension, int sampleSize) { 41fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (sampleSize > srcDimension) { 42fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return 1; 43fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 44fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return srcDimension / sampleSize; 45fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 46fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 47fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 48fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Returns the first coordinate that we will keep during a scaled decode. 49fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * The output can be interpreted as an x-coordinate or a y-coordinate. 50fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * 51fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * This does not need to be called and is not called when sampleFactor == 1. 52fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 53fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline int get_start_coord(int sampleFactor) { return sampleFactor / 2; }; 54fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 55fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 56fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Given a coordinate in the original image, this returns the corresponding 57fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * coordinate in the scaled image. This function is meaningless if 58fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * IsCoordNecessary returns false. 59fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * The output can be interpreted as an x-coordinate or a y-coordinate. 60fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * 61fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * This does not need to be called and is not called when sampleFactor == 1. 62fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 63fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline int get_dst_coord(int srcCoord, int sampleFactor) { return srcCoord / sampleFactor; }; 64fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 65fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 66fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * When scaling, we will discard certain y-coordinates (rows) and 67fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * x-coordinates (columns). This function returns true if we should keep the 68fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * coordinate and false otherwise. 69fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * The inputs may be x-coordinates or y-coordinates. 70fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * 71fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * This does not need to be called and is not called when sampleFactor == 1. 72fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 73fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline bool is_coord_necessary(int srcCoord, int sampleFactor, int scaledDim) { 74fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // Get the first coordinate that we want to keep 75fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot int startCoord = get_start_coord(sampleFactor); 76fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 77fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // Return false on edge cases 78fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (srcCoord < startCoord || get_dst_coord(srcCoord, sampleFactor) >= scaledDim) { 79fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return false; 80fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 81fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 82fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // Every sampleFactor rows are necessary 83fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return ((srcCoord - startCoord) % sampleFactor) == 0; 84fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 85fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 86fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline bool valid_alpha(SkAlphaType dstAlpha, bool srcIsOpaque) { 87fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (kUnknown_SkAlphaType == dstAlpha) { 88fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return false; 89fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 90fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 91fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (srcIsOpaque) { 92fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (kOpaque_SkAlphaType != dstAlpha) { 93fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkCodecPrintf("Warning: an opaque image should be decoded as opaque " 94fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot "- it is being decoded as non-opaque, which will draw slower\n"); 95fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 96fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return true; 97fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 98fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 99fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return dstAlpha != kOpaque_SkAlphaType; 100fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 101fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 102fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 103fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * If there is a color table, get a pointer to the colors, otherwise return nullptr 104fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 105fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline const SkPMColor* get_color_ptr(SkColorTable* colorTable) { 106fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return nullptr != colorTable ? colorTable->readColors() : nullptr; 107fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 108fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 109fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 110fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Given that the encoded image uses a color table, return the fill value 111fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 112fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline uint64_t get_color_table_fill_value(SkColorType dstColorType, SkAlphaType alphaType, 113fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot const SkPMColor* colorPtr, uint8_t fillIndex, SkColorSpaceXform* colorXform, bool isRGBA) { 114fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkASSERT(nullptr != colorPtr); 115fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot switch (dstColorType) { 116fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot case kRGBA_8888_SkColorType: 117fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot case kBGRA_8888_SkColorType: 118fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return colorPtr[fillIndex]; 119fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot case kRGB_565_SkColorType: 120fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return SkPixel32ToPixel16(colorPtr[fillIndex]); 121fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot case kRGBA_F16_SkColorType: { 122fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkASSERT(colorXform); 123fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot uint64_t dstColor; 124fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot uint32_t srcColor = colorPtr[fillIndex]; 125fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkColorSpaceXform::ColorFormat srcFormat = 126fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot isRGBA ? SkColorSpaceXform::kRGBA_8888_ColorFormat 127fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot : SkColorSpaceXform::kBGRA_8888_ColorFormat; 128fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkAssertResult(colorXform->apply(select_xform_format(dstColorType), &dstColor, 129fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot srcFormat, &srcColor, 1, alphaType)); 130fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return dstColor; 131fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 132fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot default: 133fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkASSERT(false); 134fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return 0; 135fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 136fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 137fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 138fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 139fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Compute row bytes for an image using pixels per byte 140fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 141fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline size_t compute_row_bytes_ppb(int width, uint32_t pixelsPerByte) { 142fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return (width + pixelsPerByte - 1) / pixelsPerByte; 143fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 144fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 145fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 146fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Compute row bytes for an image using bytes per pixel 147fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 148fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline size_t compute_row_bytes_bpp(int width, uint32_t bytesPerPixel) { 149fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return width * bytesPerPixel; 150fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 151fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 152fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 153fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Compute row bytes for an image 154fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 155fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline size_t compute_row_bytes(int width, uint32_t bitsPerPixel) { 156fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (bitsPerPixel < 16) { 157fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkASSERT(0 == 8 % bitsPerPixel); 158fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot const uint32_t pixelsPerByte = 8 / bitsPerPixel; 159fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return compute_row_bytes_ppb(width, pixelsPerByte); 160fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } else { 161fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot SkASSERT(0 == bitsPerPixel % 8); 162fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot const uint32_t bytesPerPixel = bitsPerPixel / 8; 163fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return compute_row_bytes_bpp(width, bytesPerPixel); 164fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 165fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 166fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 167fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 168fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Get a byte from a buffer 169fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * This method is unsafe, the caller is responsible for performing a check 170fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 171fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline uint8_t get_byte(uint8_t* buffer, uint32_t i) { 172fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return buffer[i]; 173fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 174fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 175fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 176fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Get a short from a buffer 177fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * This method is unsafe, the caller is responsible for performing a check 178fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 179fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline uint16_t get_short(uint8_t* buffer, uint32_t i) { 180fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot uint16_t result; 181fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot memcpy(&result, &(buffer[i]), 2); 182fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#ifdef SK_CPU_BENDIAN 183fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return SkEndianSwap16(result); 184fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#else 185fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return result; 186fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#endif 187fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 188fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 189fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 190fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Get an int from a buffer 191fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * This method is unsafe, the caller is responsible for performing a check 192fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 193fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline uint32_t get_int(uint8_t* buffer, uint32_t i) { 194fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot uint32_t result; 195fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot memcpy(&result, &(buffer[i]), 4); 196fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#ifdef SK_CPU_BENDIAN 197fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return SkEndianSwap32(result); 198fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#else 199fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return result; 200fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#endif 201fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 202fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 203fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot/* 204fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * @param data Buffer to read bytes from 205fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * @param isLittleEndian Output parameter 206fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Indicates if the data is little endian 207fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot * Is unaffected on false returns 208fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot */ 209fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline bool is_valid_endian_marker(const uint8_t* data, bool* isLittleEndian) { 210fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // II indicates Intel (little endian) and MM indicates motorola (big endian). 211fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (('I' != data[0] || 'I' != data[1]) && ('M' != data[0] || 'M' != data[1])) { 212fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return false; 213fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 214fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 215fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot *isLittleEndian = ('I' == data[0]); 216fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return true; 217fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 218fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 219fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline uint16_t get_endian_short(const uint8_t* data, bool littleEndian) { 220fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (littleEndian) { 221fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return (data[1] << 8) | (data[0]); 222fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 223fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 224fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return (data[0] << 8) | (data[1]); 225fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 226fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 227fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline SkPMColor premultiply_argb_as_rgba(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { 228fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (a != 255) { 229fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot r = SkMulDiv255Round(r, a); 230fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot g = SkMulDiv255Round(g, a); 231fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot b = SkMulDiv255Round(b, a); 232fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 233fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 234fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return SkPackARGB_as_RGBA(a, r, g, b); 235fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 236fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 237fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline SkPMColor premultiply_argb_as_bgra(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { 238fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (a != 255) { 239fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot r = SkMulDiv255Round(r, a); 240fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot g = SkMulDiv255Round(g, a); 241fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot b = SkMulDiv255Round(b, a); 242fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 243fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 244fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return SkPackARGB_as_BGRA(a, r, g, b); 245fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 246fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 247fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline bool is_rgba(SkColorType colorType) { 248fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#ifdef SK_PMCOLOR_IS_RGBA 249fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return (kBGRA_8888_SkColorType != colorType); 250fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#else 251fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return (kRGBA_8888_SkColorType == colorType); 252fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#endif 253fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 254fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 255fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot// Method for coverting to a 32 bit pixel. 256fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robottypedef uint32_t (*PackColorProc)(U8CPU a, U8CPU r, U8CPU g, U8CPU b); 257fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 258fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline PackColorProc choose_pack_color_proc(bool isPremul, SkColorType colorType) { 259fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot bool isRGBA = is_rgba(colorType); 260fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (isPremul) { 261fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (isRGBA) { 262fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return &premultiply_argb_as_rgba; 263fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } else { 264fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return &premultiply_argb_as_bgra; 265fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 266fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } else { 267fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (isRGBA) { 268fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return &SkPackARGB_as_RGBA; 269fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } else { 270fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return &SkPackARGB_as_BGRA; 271fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 272fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 273fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 274fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 275fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline bool needs_premul(SkAlphaType dstAT, SkEncodedInfo::Alpha encodedAlpha) { 276fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return kPremul_SkAlphaType == dstAT && SkEncodedInfo::kUnpremul_Alpha == encodedAlpha; 277fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 278fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 279fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline bool needs_color_xform(const SkImageInfo& dstInfo, const SkColorSpace* srcCS, 280fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot bool needsColorCorrectPremul) { 281fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // We never perform a color xform in legacy mode. 282fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot if (!dstInfo.colorSpace()) { 283fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return false; 284fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot } 285fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 286fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // F16 is by definition a linear space, so we always must perform a color xform. 287fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot bool isF16 = kRGBA_F16_SkColorType == dstInfo.colorType(); 288fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 289fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot // Need a color xform when dst space does not match the src. 290fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot bool srcDstNotEqual = !SkColorSpace::Equals(srcCS, dstInfo.colorSpace()); 291fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 292fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return needsColorCorrectPremul || isF16 || srcDstNotEqual; 293fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 294fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 295fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotstatic inline SkAlphaType select_xform_alpha(SkAlphaType dstAlphaType, SkAlphaType srcAlphaType) { 296fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot return (kOpaque_SkAlphaType == srcAlphaType) ? kOpaque_SkAlphaType : dstAlphaType; 297fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot} 298fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 299fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robotbool is_orientation_marker(const uint8_t* data, size_t data_length, SkEncodedOrigin* orientation); 300fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot 301fe17456d5e528078ce69b5f15cf7adf1fab963fandroid-build-team Robot#endif // SkCodecPriv_DEFINED 302