SkImageDecoder_libwebp.cpp revision 82ed38078af4a2b643415a76e84f88754f804709
18432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold/* 28432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * Copyright 2010, The Android Open Source Project 38432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * 48432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * Licensed under the Apache License, Version 2.0 (the "License"); 58432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * you may not use this file except in compliance with the License. 68432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * You may obtain a copy of the License at 78432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * 88432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * http://www.apache.org/licenses/LICENSE-2.0 98432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * 108432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * Unless required by applicable law or agreed to in writing, software 118432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * distributed under the License is distributed on an "AS IS" BASIS, 128432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 138432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * See the License for the specific language governing permissions and 148432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold * limitations under the License. 158432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold */ 168432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 178432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkImageDecoder.h" 188432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkImageEncoder.h" 198432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkColorPriv.h" 208432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkDither.h" 218432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkScaledBitmapSampler.h" 228432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkStream.h" 238432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkTemplates.h" 248432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkUtils.h" 258432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 268432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// A WebP decoder only, on top of (subset of) libwebp 278432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// For more information on WebP image format, and libwebp library, see: 288432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// http://code.google.com/speed/webp/ 298432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// http://www.webmproject.org/code/#libwebp_webp_image_decoder_library 308432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// http://review.webmproject.org/gitweb?p=libwebp.git 318432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 328432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include <stdio.h> 338432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldextern "C" { 348432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// If moving libwebp out of skia source tree, path for webp headers must be updated accordingly. 358432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// Here, we enforce using local copy in webp sub-directory. 368432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "webp/decode.h" 378432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "webp/decode_vp8.h" 38a059123d8eb75302b13a7fd831478413d124d618Vikas Arora#include "webp/encode.h" 398432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 408432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 418432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold/* If defined, work around missing padding byte in content generated by webpconv */ 428432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define WEBPCONV_MISSING_PADDING 1 438432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 448432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#ifdef ANDROID 458432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include <cutils/properties.h> 468432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 478432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// Key to lookup the size of memory buffer set in system property 488432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic const char KEY_MEM_CAP[] = "ro.media.dec.webp.memcap"; 498432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#endif 508432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 518432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// this enables timing code to report milliseconds for a decode 528432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold//#define TIME_DECODE 538432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 548432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold////////////////////////////////////////////////////////////////////////// 558432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold////////////////////////////////////////////////////////////////////////// 568432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 578432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// Define VP8 I/O on top of Skia stream 588432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 598432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold////////////////////////////////////////////////////////////////////////// 608432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold////////////////////////////////////////////////////////////////////////// 618432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 628432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// An helper to extract a integer (little endian) from byte array. This is 638432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// called only once per decoding, so no real need to optimize it in any way 648432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic uint32_t getint32l(unsigned char *in) { 658432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold int result; 668432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold unsigned char *buffer = (unsigned char*) in; 678432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 688432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (buffer == NULL) { 698432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return 0; 708432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 718432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 728432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold result = buffer[3]; 738432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold result = (result << 8) + buffer[2]; 748432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold result = (result << 8) + buffer[1]; 758432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold result = (result << 8) + buffer[0]; 768432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 778432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return result; 788432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 798432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 8082ed38078af4a2b643415a76e84f88754f804709Vikas Arorastatic const size_t WEBP_VP8_HEADER_SIZE = 30; 8182ed38078af4a2b643415a76e84f88754f804709Vikas Arorastatic const size_t WEBP_IDECODE_BUFFER_SZ = (1 << 16); 828432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 8382ed38078af4a2b643415a76e84f88754f804709Vikas Arora// Parse headers of RIFF container, and check for valid Webp (VP8) content. 8482ed38078af4a2b643415a76e84f88754f804709Vikas Arorastatic bool webp_parse_header(SkStream* stream, int* width, int* height) { 8582ed38078af4a2b643415a76e84f88754f804709Vikas Arora unsigned char buffer[WEBP_VP8_HEADER_SIZE]; 8682ed38078af4a2b643415a76e84f88754f804709Vikas Arora const size_t len = stream->read(buffer, WEBP_VP8_HEADER_SIZE); 8782ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (len != WEBP_VP8_HEADER_SIZE) { 8882ed38078af4a2b643415a76e84f88754f804709Vikas Arora return false; // can't read enough 898432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 908432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 9182ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (WebPGetInfo(buffer, WEBP_VP8_HEADER_SIZE, width, height) == 0) { 9282ed38078af4a2b643415a76e84f88754f804709Vikas Arora return false; // Invalid WebP file. 938432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 948432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 9582ed38078af4a2b643415a76e84f88754f804709Vikas Arora // sanity check for image size that's about to be decoded. 9682ed38078af4a2b643415a76e84f88754f804709Vikas Arora { 9782ed38078af4a2b643415a76e84f88754f804709Vikas Arora Sk64 size; 9882ed38078af4a2b643415a76e84f88754f804709Vikas Arora size.setMul(*width, *height); 9982ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (size.isNeg() || !size.is32()) { 10082ed38078af4a2b643415a76e84f88754f804709Vikas Arora return false; 10182ed38078af4a2b643415a76e84f88754f804709Vikas Arora } 10282ed38078af4a2b643415a76e84f88754f804709Vikas Arora // now check that if we are 4-bytes per pixel, we also don't overflow 10382ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (size.get32() > (0x7FFFFFFF >> 2)) { 10482ed38078af4a2b643415a76e84f88754f804709Vikas Arora return false; 10582ed38078af4a2b643415a76e84f88754f804709Vikas Arora } 1068432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 10782ed38078af4a2b643415a76e84f88754f804709Vikas Arora return true; 1088432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 1098432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1108432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldclass SkWEBPImageDecoder: public SkImageDecoder { 1118432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldpublic: 1128432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold virtual Format getFormat() const { 1138432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return kWEBP_Format; 1148432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 1158432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1168432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldprotected: 1178432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold virtual bool onDecode(SkStream* stream, SkBitmap* bm, Mode); 11882ed38078af4a2b643415a76e84f88754f804709Vikas Arora 11982ed38078af4a2b643415a76e84f88754f804709Vikas Aroraprivate: 12082ed38078af4a2b643415a76e84f88754f804709Vikas Arora bool setDecodeConfig(SkBitmap* decodedBitmap, int width, int height); 1218432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold}; 1228432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1238432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold////////////////////////////////////////////////////////////////////////// 1248432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1258432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkTime.h" 1268432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1278432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldclass AutoTimeMillis { 1288432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldpublic: 1298432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold AutoTimeMillis(const char label[]) : 1308432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold fLabel(label) { 1318432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (!fLabel) { 1328432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold fLabel = ""; 1338432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 1348432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold fNow = SkTime::GetMSecs(); 1358432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 1368432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold ~AutoTimeMillis() { 1378432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold SkDebugf("---- Time (ms): %s %d\n", fLabel, SkTime::GetMSecs() - fNow); 1388432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 1398432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldprivate: 1408432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const char* fLabel; 1418432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold SkMSec fNow; 1428432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold}; 1438432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1448432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold/////////////////////////////////////////////////////////////////////////////// 1458432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1468432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// This guy exists just to aid in debugging, as it allows debuggers to just 1478432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// set a break-point in one place to see all error exists. 1488432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic bool return_false(const SkBitmap& bm, const char msg[]) { 1498432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#if 0 1508432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold SkDebugf("libwebp error %s [%d %d]", msg, bm.width(), bm.height()); 1518432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#endif 1528432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; // must always return false 1538432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 1548432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1558432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldtypedef struct { 1568432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold SkBitmap* image; 1578432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold SkStream* stream; 1588432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} WEBPImage; 1598432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1608432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// WebP library embeds its own YUV to RGB converter. However, High-level API doesn't take benefit 1618432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// of (U,v) clipped values being valid for up to 4 pixels, and so there is a significant improvement 1628432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// in performance in handling this on our own. 1638432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// TODO: use architecture-optimized (eventually hardware-accelerated) YUV converters 1648432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define YUV_HALF (1 << (YUV_FIX - 1)) 1658432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define YUV_FIX 16 // fixed-point precision 1668432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define YUV_RANGE_MIN (-227) // min value of r/g/b output 1678432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define YUV_RANGE_MAX (256 + 226) // max value of r/g/b output 1688432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic int16_t VP8kVToR[256], VP8kUToB[256]; 1698432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic int32_t VP8kVToG[256], VP8kUToG[256]; 1708432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN]; 1718432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1728432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic void yuv_init_tables() { 1738432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold int i; 1748432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1758432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold for (i = 0; i < 256; ++i) { 1768432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kVToR[i] = (89858 * (i - 128) + YUV_HALF) >> YUV_FIX; 1778432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kUToG[i] = -22014 * (i - 128) + YUV_HALF; 1788432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kVToG[i] = -45773 * (i - 128); 1798432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kUToB[i] = (113618 * (i - 128) + YUV_HALF) >> YUV_FIX; 1808432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 1818432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold for (i = YUV_RANGE_MIN; i < YUV_RANGE_MAX; ++i) { 1828432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int k = ((i - 16) * 76283 + YUV_HALF) >> YUV_FIX; 1838432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[i - YUV_RANGE_MIN] = (k < 0) ? 0 : (k > 255) ? 255 : k; 1848432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 1858432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 1868432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1878432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold// Static global mutex to protect Webp initialization 1888432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic SkMutex gYUVMutex; 1898432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic bool gYUVReady = false; 1908432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 1918432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic bool yuv_init() { 1928432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (!gYUVReady) { 1938432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold gYUVMutex.acquire(); 1948432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (!gYUVReady) { 1958432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold yuv_init_tables(); 1968432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold gYUVReady = true; 1978432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 1988432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold gYUVMutex.release(); 1998432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 2008432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2018432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return gYUVReady; 2028432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 2038432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2048432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define PutRGBA(p,r,g,b) (((SkPMColor*) (p))[0] = SkPackARGB32(0xff,(r),(g),(b))) 2058432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define PutRGB565(p,r,g,b) (((SkPMColor16*) (p))[0] = SkPackRGB16((r)>>3,(g)>>2,(b)>>3)) 2068432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define PutRGBA4444(p,r,g,b) (((SkPMColor16*) (p))[0] = SkPackARGB4444(0xf,(r)>>4,(g)>>4,(b)>>4)) 2078432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2088432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define CRGBA(p,y,roff,goff,boff) PutRGBA(p, \ 2098432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[(y) + (roff) - YUV_RANGE_MIN], \ 2108432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[(y) + (goff) - YUV_RANGE_MIN], \ 2118432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[(y) + (boff) - YUV_RANGE_MIN]) 2128432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define CRGB565(p,y,roff,goff,boff) PutRGB565(p, \ 2138432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[(y) + (roff) - YUV_RANGE_MIN], \ 2148432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[(y) + (goff) - YUV_RANGE_MIN], \ 2158432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[(y) + (boff) - YUV_RANGE_MIN]) 2168432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#define CRGBA4444(p,y,roff,goff,boff) PutRGBA4444(p, \ 2178432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[(y) + (roff) - YUV_RANGE_MIN], \ 2188432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[(y) + (goff) - YUV_RANGE_MIN], \ 2198432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold VP8kClip[(y) + (boff) - YUV_RANGE_MIN]) 2208432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 221b5635a2ff98e9de637b0f87744ceca7b86891a0fVikas Arorastatic int block_put(const VP8Io* io) { 2228432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold WEBPImage *p = (WEBPImage*) io->opaque; 2238432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold SkBitmap* decodedBitmap = p->image; 2248432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2258432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int w = io->width; 2268432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int mb_h = io->mb_h; 2278432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2288432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const uint8_t *y, *y2, *u, *v; 2298432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const uint8_t *py, *py2, *pu, *pv; 2308432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2318432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold uint8_t* pout; 2328432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold uint8_t* pout2; 2338432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2348432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold int i, j; 2358432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int ystride2 = io->y_stride * 2; 2368432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold int bpp; 2378432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold SkBitmap::Config config = decodedBitmap->config(); 2388432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2398432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold //SkASSERT(!(io->mb_y & 1)); 2408432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2418432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold y = io->y; 2428432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold u = io->u; 2438432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold v = io->v; 2448432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2458432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold switch (config) { 2468432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold case SkBitmap::kARGB_8888_Config: 2478432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold bpp = 4; 2488432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold break; 2498432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold case SkBitmap::kRGB_565_Config: 2508432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold bpp = 2; 2518432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold break; 2528432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold case SkBitmap::kARGB_4444_Config: 2538432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold bpp = 2; 2548432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold break; 2558432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold default: 2568432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Unsupported config 257b5635a2ff98e9de637b0f87744ceca7b86891a0fVikas Arora return 0; 2588432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 2598432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2608432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold for (j = 0; j < mb_h;) { 2618432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout = decodedBitmap->getAddr8(0, io->mb_y + j); 2628432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (j + 1 < mb_h) { 2638432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold y2 = y + io->y_stride; 2648432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout2 = decodedBitmap->getAddr8(0, io->mb_y + j + 1); 2658432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } else { 2668432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold y2 = NULL; 2678432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout2 = NULL; 2688432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 2698432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2708432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Copy YUV into target buffer 2718432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py = y; 2728432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pu = u; 2738432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pv = v; 2748432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2758432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py2 = y2; 2768432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2778432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Leave test for config out of inner loop. This implies some redundancy in code, 2788432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // but help in supporting several configs without degrading performance. 2798432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // As a reminder, one must *NOT* put py increment into parameters (i.e. *py++) in the hope to 2808432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // improve performance or code readability. Since it is used as argument of a macro which uses it 2818432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // several times in its expression, so this would end up in having it too much incremented 2828432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold switch (config) { 2838432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold case SkBitmap::kARGB_8888_Config: 2848432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold for (i = 0; i < w; i += 2) { 2858432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // U and V are common for up to 4 pixels 2868432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int r_off = VP8kVToR[*pv]; 2878432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int g_off = (VP8kVToG[*pv] + VP8kUToG[*pu]) >> YUV_FIX; 2888432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int b_off = VP8kUToB[*pu]; 2898432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2908432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGBA(pout, *py, r_off, g_off, b_off); 2918432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout += bpp; 2928432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py++; 2938432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 2948432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Width shouldn't be odd, so this should always be true 2958432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (i + 1 < w) { 2968432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGBA(pout, *py, r_off, g_off, b_off); 2978432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout += bpp; 2988432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py++; 2998432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3008432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3018432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (pout2) { 3028432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGBA(pout2, *py2, r_off, g_off, b_off); 3038432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout2 += bpp; 3048432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py2++; 3058432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3068432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Width shouldn't be odd, so this should always be true 3078432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (i + 1 < w) { 3088432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGBA(pout2, *py2, r_off, g_off, b_off); 3098432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout2 += bpp; 3108432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py2++; 3118432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3128432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3138432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3148432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pu++; 3158432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pv++; 3168432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3178432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold break; 3188432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold case SkBitmap::kRGB_565_Config: 3198432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold for (i = 0; i < w; i += 2) { 3208432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // U and V are common for up to 4 pixels 3218432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int r_off = VP8kVToR[*pv]; 3228432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int g_off = (VP8kVToG[*pv] + VP8kUToG[*pu]) >> YUV_FIX; 3238432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int b_off = VP8kUToB[*pu]; 3248432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3258432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGB565(pout, *py, r_off, g_off, b_off); 3268432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout += bpp; 3278432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py++; 3288432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3298432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Width shouldn't be odd, so this should always be true 3308432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (i + 1 < w) { 3318432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGB565(pout, *py, r_off, g_off, b_off); 3328432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout += bpp; 3338432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py++; 3348432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3358432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3368432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (pout2) { 3378432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGB565(pout2, *py2, r_off, g_off, b_off); 3388432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout2 += bpp; 3398432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py2++; 3408432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3418432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Width shouldn't be odd, so this should always be true 3428432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (i + 1 < w) { 3438432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGB565(pout2, *py2, r_off, g_off, b_off); 3448432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout2 += bpp; 3458432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py2++; 3468432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3478432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3488432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3498432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pu++; 3508432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pv++; 3518432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3528432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold break; 3538432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold case SkBitmap::kARGB_4444_Config: 3548432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold for (i = 0; i < w; i += 2) { 3558432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // U and V are common for up to 4 pixels 3568432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int r_off = VP8kVToR[*pv]; 3578432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int g_off = (VP8kVToG[*pv] + VP8kUToG[*pu]) >> YUV_FIX; 3588432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold const int b_off = VP8kUToB[*pu]; 3598432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3608432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGBA4444(pout, *py, r_off, g_off, b_off); 3618432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout += bpp; 3628432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py++; 3638432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3648432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Width shouldn't be odd, so this should always be true 3658432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (i + 1 < w) { 3668432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGBA4444(pout, *py, r_off, g_off, b_off); 3678432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout += bpp; 3688432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py++; 3698432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3708432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3718432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (pout2) { 3728432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGBA4444(pout2, *py2, r_off, g_off, b_off); 3738432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout2 += bpp; 3748432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py2++; 3758432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3768432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Width shouldn't be odd, so this should always be true 3778432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (i + 1 < w) { 3788432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold CRGBA4444(pout2, *py2, r_off, g_off, b_off); 3798432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pout2 += bpp; 3808432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold py2++; 3818432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3828432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3838432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3848432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pu++; 3858432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold pv++; 3868432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3878432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold break; 3888432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold default: 3898432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Unsupported config (can't happen, but prevents compiler warning) 3908432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold SkASSERT(0); 3918432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold break; 3928432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 3938432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 3948432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (y2) { 3958432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Scanned and populated two rows 3968432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold y += ystride2; 3978432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold y2 += ystride2; 3988432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold j += 2; 3998432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } else { 4008432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Skip to next row 4018432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold y += io->y_stride; 4028432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold j++; 4038432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 4048432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 4058432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold u += io->uv_stride; 4068432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold v += io->uv_stride; 4078432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 4088432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 409b5635a2ff98e9de637b0f87744ceca7b86891a0fVikas Arora return 1; 4108432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 4118432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 4128432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic int block_setup(VP8Io* io) { 4138432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold yuv_init(); 4148432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return 1; 4158432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 4168432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 4178432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic void block_teardown(const VP8Io* io) { 4188432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 4198432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 42082ed38078af4a2b643415a76e84f88754f804709Vikas Arorastatic bool webp_init_custom_io(WebPIDecoder* idec, SkBitmap* decodedBitmap) { 42182ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (idec == NULL) { 4228432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 4238432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 4248432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 42582ed38078af4a2b643415a76e84f88754f804709Vikas Arora WEBPImage pSrc; 42682ed38078af4a2b643415a76e84f88754f804709Vikas Arora // Custom Put callback need reference to target image. 42782ed38078af4a2b643415a76e84f88754f804709Vikas Arora pSrc.image = decodedBitmap; 4288432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 42982ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (!WebPISetIOHooks(idec, block_put, block_setup, block_teardown, 43082ed38078af4a2b643415a76e84f88754f804709Vikas Arora (void*)&pSrc)) { 4318432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 4328432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 4338432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 43482ed38078af4a2b643415a76e84f88754f804709Vikas Arora return true; 43582ed38078af4a2b643415a76e84f88754f804709Vikas Arora} 43682ed38078af4a2b643415a76e84f88754f804709Vikas Arora 43782ed38078af4a2b643415a76e84f88754f804709Vikas Arora// Incremental WebP image decoding. Reads input buffer of 64K size iteratively 43882ed38078af4a2b643415a76e84f88754f804709Vikas Arora// and decodes this block to appropriate color-space as per config object. 43982ed38078af4a2b643415a76e84f88754f804709Vikas Arorastatic bool webp_idecode(SkStream* stream, SkBitmap* decodedBitmap) { 44082ed38078af4a2b643415a76e84f88754f804709Vikas Arora SkAutoLockPixels alp(*decodedBitmap); 4418432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 44282ed38078af4a2b643415a76e84f88754f804709Vikas Arora stream->rewind(); 44382ed38078af4a2b643415a76e84f88754f804709Vikas Arora const uint32_t contentSize = stream->getLength(); 4448432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 44582ed38078af4a2b643415a76e84f88754f804709Vikas Arora WebPIDecoder* idec = WebPINew(MODE_YUV); 44682ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (idec == NULL) { 4478432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 4488432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 4498432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 45082ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (!webp_init_custom_io(idec, decodedBitmap)) { 45182ed38078af4a2b643415a76e84f88754f804709Vikas Arora WebPIDelete(idec); 4528432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 4538432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 4548432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 45582ed38078af4a2b643415a76e84f88754f804709Vikas Arora uint32_t read_buffer_size = contentSize; 45682ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (read_buffer_size > WEBP_IDECODE_BUFFER_SZ) { 45782ed38078af4a2b643415a76e84f88754f804709Vikas Arora read_buffer_size = WEBP_IDECODE_BUFFER_SZ; 4588432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 45982ed38078af4a2b643415a76e84f88754f804709Vikas Arora SkAutoMalloc srcStorage(read_buffer_size); 46082ed38078af4a2b643415a76e84f88754f804709Vikas Arora unsigned char* input = (uint8_t*)srcStorage.get(); 46182ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (input == NULL) { 46282ed38078af4a2b643415a76e84f88754f804709Vikas Arora WebPIDelete(idec); 4638432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 4648432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 46582ed38078af4a2b643415a76e84f88754f804709Vikas Arora 46682ed38078af4a2b643415a76e84f88754f804709Vikas Arora uint32_t bytes_remaining = contentSize; 46782ed38078af4a2b643415a76e84f88754f804709Vikas Arora while (bytes_remaining > 0) { 46882ed38078af4a2b643415a76e84f88754f804709Vikas Arora const uint32_t bytes_to_read = 46982ed38078af4a2b643415a76e84f88754f804709Vikas Arora (bytes_remaining > WEBP_IDECODE_BUFFER_SZ) ? 47082ed38078af4a2b643415a76e84f88754f804709Vikas Arora WEBP_IDECODE_BUFFER_SZ : bytes_remaining; 47182ed38078af4a2b643415a76e84f88754f804709Vikas Arora 47282ed38078af4a2b643415a76e84f88754f804709Vikas Arora const size_t bytes_read = stream->read(input, bytes_to_read); 47382ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (bytes_read == 0) { 47482ed38078af4a2b643415a76e84f88754f804709Vikas Arora break; 47582ed38078af4a2b643415a76e84f88754f804709Vikas Arora } 47682ed38078af4a2b643415a76e84f88754f804709Vikas Arora 47782ed38078af4a2b643415a76e84f88754f804709Vikas Arora VP8StatusCode status = WebPIAppend(idec, input, bytes_read); 47882ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (status == VP8_STATUS_OK || status == VP8_STATUS_SUSPENDED) { 47982ed38078af4a2b643415a76e84f88754f804709Vikas Arora bytes_remaining -= bytes_read; 48082ed38078af4a2b643415a76e84f88754f804709Vikas Arora } else { 48182ed38078af4a2b643415a76e84f88754f804709Vikas Arora break; 48282ed38078af4a2b643415a76e84f88754f804709Vikas Arora } 48382ed38078af4a2b643415a76e84f88754f804709Vikas Arora } 48482ed38078af4a2b643415a76e84f88754f804709Vikas Arora srcStorage.free(); 48582ed38078af4a2b643415a76e84f88754f804709Vikas Arora WebPIDelete(idec); 48682ed38078af4a2b643415a76e84f88754f804709Vikas Arora 48782ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (bytes_remaining > 0) { 4888432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 48982ed38078af4a2b643415a76e84f88754f804709Vikas Arora } else { 49082ed38078af4a2b643415a76e84f88754f804709Vikas Arora return true; 4918432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 49282ed38078af4a2b643415a76e84f88754f804709Vikas Arora} 4938432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 49482ed38078af4a2b643415a76e84f88754f804709Vikas Arorabool SkWEBPImageDecoder::setDecodeConfig(SkBitmap* decodedBitmap, 49582ed38078af4a2b643415a76e84f88754f804709Vikas Arora int origWidth, int origHeight) { 49682ed38078af4a2b643415a76e84f88754f804709Vikas Arora bool hasAlpha = false; 49782ed38078af4a2b643415a76e84f88754f804709Vikas Arora SkBitmap::Config config = this->getPrefConfig(k32Bit_SrcDepth, hasAlpha); 4988432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 4998432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // only accept prefConfig if it makes sense for us. YUV converter 5008432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // supports output in RGB565, RGBA4444 and RGBA8888 formats. 5018432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (hasAlpha) { 5028432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (config != SkBitmap::kARGB_4444_Config) { 5038432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold config = SkBitmap::kARGB_8888_Config; 5048432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 5058432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } else { 50682ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (config != SkBitmap::kRGB_565_Config && 50782ed38078af4a2b643415a76e84f88754f804709Vikas Arora config != SkBitmap::kARGB_4444_Config) { 5088432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold config = SkBitmap::kARGB_8888_Config; 5098432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 5108432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 5118432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 5128432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 5138432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold if (!this->chooseFromOneChoice(config, origWidth, origHeight)) { 5148432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 5158432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 5168432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 5178432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold decodedBitmap->setConfig(config, origWidth, origHeight, 0); 5188432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 5198432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Current WEBP specification has no support for alpha layer. 5208432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold decodedBitmap->setIsOpaque(true); 5218432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 52282ed38078af4a2b643415a76e84f88754f804709Vikas Arora return true; 52382ed38078af4a2b643415a76e84f88754f804709Vikas Arora} 5248432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 52582ed38078af4a2b643415a76e84f88754f804709Vikas Arora 52682ed38078af4a2b643415a76e84f88754f804709Vikas Arorabool SkWEBPImageDecoder::onDecode(SkStream* stream, SkBitmap* decodedBitmap, 52782ed38078af4a2b643415a76e84f88754f804709Vikas Arora Mode mode) { 52882ed38078af4a2b643415a76e84f88754f804709Vikas Arora#ifdef TIME_DECODE 52982ed38078af4a2b643415a76e84f88754f804709Vikas Arora AutoTimeMillis atm("WEBP Decode"); 5308432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#endif 53182ed38078af4a2b643415a76e84f88754f804709Vikas Arora 53282ed38078af4a2b643415a76e84f88754f804709Vikas Arora int origWidth, origHeight; 53382ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (!webp_parse_header(stream, &origWidth, &origHeight)) { 5348432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 5358432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 5368432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 53782ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (!setDecodeConfig(decodedBitmap, origWidth, origHeight)) { 5388432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 5398432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 5408432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 54182ed38078af4a2b643415a76e84f88754f804709Vikas Arora // If only bounds are requested, done 54282ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (SkImageDecoder::kDecodeBounds_Mode == mode) { 54382ed38078af4a2b643415a76e84f88754f804709Vikas Arora return true; 54482ed38078af4a2b643415a76e84f88754f804709Vikas Arora } 5458432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 54682ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (!this->allocPixelRef(decodedBitmap, NULL)) { 54782ed38078af4a2b643415a76e84f88754f804709Vikas Arora return return_false(*decodedBitmap, "allocPixelRef"); 5488432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 5498432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 55082ed38078af4a2b643415a76e84f88754f804709Vikas Arora // Decode the WebP image data stream using WebP incremental decoding. 55182ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (!webp_idecode(stream, decodedBitmap)) { 5528432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return false; 5538432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 5548432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 5558432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return true; 5568432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 5578432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 5588432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold/////////////////////////////////////////////////////////////////////////////// 5598432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 560a059123d8eb75302b13a7fd831478413d124d618Vikas Aroratypedef void (*ScanlineImporter)(const uint8_t* in, uint8_t* out, int width, 561a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const SkPMColor* SK_RESTRICT ctable); 562a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 563a059123d8eb75302b13a7fd831478413d124d618Vikas Arorastatic void ARGB_8888_To_RGB(const uint8_t* in, uint8_t* rgb, int width, 564a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const SkPMColor*) { 565a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const uint32_t* SK_RESTRICT src = (const uint32_t*)in; 566a059123d8eb75302b13a7fd831478413d124d618Vikas Arora for (int i = 0; i < width; ++i) { 567a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const uint32_t c = *src++; 568a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[0] = SkGetPackedR32(c); 569a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[1] = SkGetPackedG32(c); 570a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[2] = SkGetPackedB32(c); 571a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb += 3; 572a059123d8eb75302b13a7fd831478413d124d618Vikas Arora } 573a059123d8eb75302b13a7fd831478413d124d618Vikas Arora} 574a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 575a059123d8eb75302b13a7fd831478413d124d618Vikas Arorastatic void RGB_565_To_RGB(const uint8_t* in, uint8_t* rgb, int width, 576a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const SkPMColor*) { 577a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const uint16_t* SK_RESTRICT src = (const uint16_t*)in; 578a059123d8eb75302b13a7fd831478413d124d618Vikas Arora for (int i = 0; i < width; ++i) { 579a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const uint16_t c = *src++; 580a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[0] = SkPacked16ToR32(c); 581a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[1] = SkPacked16ToG32(c); 582a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[2] = SkPacked16ToB32(c); 583a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb += 3; 584a059123d8eb75302b13a7fd831478413d124d618Vikas Arora } 585a059123d8eb75302b13a7fd831478413d124d618Vikas Arora} 586a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 587a059123d8eb75302b13a7fd831478413d124d618Vikas Arorastatic void ARGB_4444_To_RGB(const uint8_t* in, uint8_t* rgb, int width, 588a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const SkPMColor*) { 589a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const SkPMColor16* SK_RESTRICT src = (const SkPMColor16*)in; 590a059123d8eb75302b13a7fd831478413d124d618Vikas Arora for (int i = 0; i < width; ++i) { 591a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const SkPMColor16 c = *src++; 592a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[0] = SkPacked4444ToR32(c); 593a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[1] = SkPacked4444ToG32(c); 594a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[2] = SkPacked4444ToB32(c); 595a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb += 3; 596a059123d8eb75302b13a7fd831478413d124d618Vikas Arora } 597a059123d8eb75302b13a7fd831478413d124d618Vikas Arora} 598a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 599a059123d8eb75302b13a7fd831478413d124d618Vikas Arorastatic void Index8_To_RGB(const uint8_t* in, uint8_t* rgb, int width, 600a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const SkPMColor* SK_RESTRICT ctable) { 601a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const uint8_t* SK_RESTRICT src = (const uint8_t*)in; 602a059123d8eb75302b13a7fd831478413d124d618Vikas Arora for (int i = 0; i < width; ++i) { 603a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const uint32_t c = ctable[*src++]; 604a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[0] = SkGetPackedR32(c); 605a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[1] = SkGetPackedG32(c); 606a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb[2] = SkGetPackedB32(c); 607a059123d8eb75302b13a7fd831478413d124d618Vikas Arora rgb += 3; 608a059123d8eb75302b13a7fd831478413d124d618Vikas Arora } 609a059123d8eb75302b13a7fd831478413d124d618Vikas Arora} 610a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 611a059123d8eb75302b13a7fd831478413d124d618Vikas Arorastatic ScanlineImporter ChooseImporter(const SkBitmap::Config& config) { 612a059123d8eb75302b13a7fd831478413d124d618Vikas Arora switch (config) { 613a059123d8eb75302b13a7fd831478413d124d618Vikas Arora case SkBitmap::kARGB_8888_Config: 614a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return ARGB_8888_To_RGB; 615a059123d8eb75302b13a7fd831478413d124d618Vikas Arora case SkBitmap::kRGB_565_Config: 616a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return RGB_565_To_RGB; 617a059123d8eb75302b13a7fd831478413d124d618Vikas Arora case SkBitmap::kARGB_4444_Config: 618a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return ARGB_4444_To_RGB; 619a059123d8eb75302b13a7fd831478413d124d618Vikas Arora case SkBitmap::kIndex8_Config: 620a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return Index8_To_RGB; 621a059123d8eb75302b13a7fd831478413d124d618Vikas Arora default: 622a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return NULL; 623a059123d8eb75302b13a7fd831478413d124d618Vikas Arora } 624a059123d8eb75302b13a7fd831478413d124d618Vikas Arora} 625a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 626a059123d8eb75302b13a7fd831478413d124d618Vikas Arorastatic int StreamWriter(const uint8_t* data, size_t data_size, 627a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const WebPPicture* const picture) { 628a059123d8eb75302b13a7fd831478413d124d618Vikas Arora SkWStream* const stream = (SkWStream*)picture->custom_ptr; 629a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return stream->write(data, data_size) ? 1 : 0; 630a059123d8eb75302b13a7fd831478413d124d618Vikas Arora} 631a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 632a059123d8eb75302b13a7fd831478413d124d618Vikas Aroraclass SkWEBPImageEncoder : public SkImageEncoder { 633a059123d8eb75302b13a7fd831478413d124d618Vikas Aroraprotected: 634a059123d8eb75302b13a7fd831478413d124d618Vikas Arora virtual bool onEncode(SkWStream* stream, const SkBitmap& bm, int quality); 635a059123d8eb75302b13a7fd831478413d124d618Vikas Arora}; 636a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 637a059123d8eb75302b13a7fd831478413d124d618Vikas Arorabool SkWEBPImageEncoder::onEncode(SkWStream* stream, const SkBitmap& bm, 638a059123d8eb75302b13a7fd831478413d124d618Vikas Arora int quality) { 639a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const SkBitmap::Config config = bm.getConfig(); 640a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const ScanlineImporter scanline_import = ChooseImporter(config); 641a059123d8eb75302b13a7fd831478413d124d618Vikas Arora if (NULL == scanline_import) { 642a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return false; 643a059123d8eb75302b13a7fd831478413d124d618Vikas Arora } 644a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 645a059123d8eb75302b13a7fd831478413d124d618Vikas Arora SkAutoLockPixels alp(bm); 646a059123d8eb75302b13a7fd831478413d124d618Vikas Arora SkAutoLockColors ctLocker; 647a059123d8eb75302b13a7fd831478413d124d618Vikas Arora if (NULL == bm.getPixels()) { 648a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return false; 649a059123d8eb75302b13a7fd831478413d124d618Vikas Arora } 650a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 651a059123d8eb75302b13a7fd831478413d124d618Vikas Arora WebPConfig webp_config; 652a059123d8eb75302b13a7fd831478413d124d618Vikas Arora if (!WebPConfigPreset(&webp_config, WEBP_PRESET_DEFAULT, quality)) { 653a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return false; 654a059123d8eb75302b13a7fd831478413d124d618Vikas Arora } 655a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 656a059123d8eb75302b13a7fd831478413d124d618Vikas Arora WebPPicture pic; 657a059123d8eb75302b13a7fd831478413d124d618Vikas Arora WebPPictureInit(&pic); 658a059123d8eb75302b13a7fd831478413d124d618Vikas Arora pic.width = bm.width(); 659a059123d8eb75302b13a7fd831478413d124d618Vikas Arora pic.height = bm.height(); 660a059123d8eb75302b13a7fd831478413d124d618Vikas Arora pic.writer = StreamWriter; 661a059123d8eb75302b13a7fd831478413d124d618Vikas Arora pic.custom_ptr = (void*)stream; 662a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 663a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const SkPMColor* colors = ctLocker.lockColors(bm); 664a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const uint8_t* src = (uint8_t*)bm.getPixels(); 665a059123d8eb75302b13a7fd831478413d124d618Vikas Arora const int rgb_stride = pic.width * 3; 666a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 667a059123d8eb75302b13a7fd831478413d124d618Vikas Arora // Import (for each scanline) the bit-map image (in appropriate color-space) 668a059123d8eb75302b13a7fd831478413d124d618Vikas Arora // to RGB color space. 669a059123d8eb75302b13a7fd831478413d124d618Vikas Arora uint8_t* rgb = new uint8_t[rgb_stride * pic.height]; 670a059123d8eb75302b13a7fd831478413d124d618Vikas Arora for (int y = 0; y < pic.height; ++y) { 671a059123d8eb75302b13a7fd831478413d124d618Vikas Arora scanline_import(src + y * bm.rowBytes(), rgb + y * rgb_stride, 672a059123d8eb75302b13a7fd831478413d124d618Vikas Arora pic.width, colors); 673a059123d8eb75302b13a7fd831478413d124d618Vikas Arora } 674a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 675a059123d8eb75302b13a7fd831478413d124d618Vikas Arora bool ok = WebPPictureImportRGB(&pic, rgb, rgb_stride); 676a059123d8eb75302b13a7fd831478413d124d618Vikas Arora delete[] rgb; 677a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 678a059123d8eb75302b13a7fd831478413d124d618Vikas Arora ok = ok && WebPEncode(&webp_config, &pic); 679a059123d8eb75302b13a7fd831478413d124d618Vikas Arora WebPPictureFree(&pic); 680a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 681a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return ok; 682a059123d8eb75302b13a7fd831478413d124d618Vikas Arora} 683a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 684a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 685a059123d8eb75302b13a7fd831478413d124d618Vikas Arora/////////////////////////////////////////////////////////////////////////////// 686a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 6878432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold#include "SkTRegistry.h" 6888432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 6898432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassoldstatic SkImageDecoder* DFactory(SkStream* stream) { 69082ed38078af4a2b643415a76e84f88754f804709Vikas Arora int width, height; 69182ed38078af4a2b643415a76e84f88754f804709Vikas Arora if (!webp_parse_header(stream, &width, &height)) { 69282ed38078af4a2b643415a76e84f88754f804709Vikas Arora return false; 6938432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold } 6948432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 6958432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold // Magic matches, call decoder 6968432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return SkNEW(SkWEBPImageDecoder); 6978432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 6988432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 6998432fc7b32e4de877bb86b38c050b944bed53f14Eric HassoldSkImageDecoder* sk_libwebp_dfactory(SkStream* stream) { 7008432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold return DFactory(stream); 7018432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold} 7028432fc7b32e4de877bb86b38c050b944bed53f14Eric Hassold 703a059123d8eb75302b13a7fd831478413d124d618Vikas Arorastatic SkImageEncoder* EFactory(SkImageEncoder::Type t) { 704a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return (SkImageEncoder::kWEBP_Type == t) ? SkNEW(SkWEBPImageEncoder) : NULL; 705a059123d8eb75302b13a7fd831478413d124d618Vikas Arora} 706a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 707a059123d8eb75302b13a7fd831478413d124d618Vikas AroraSkImageEncoder* sk_libwebp_efactory(SkImageEncoder::Type t) { 708a059123d8eb75302b13a7fd831478413d124d618Vikas Arora return EFactory(t); 709a059123d8eb75302b13a7fd831478413d124d618Vikas Arora} 710a059123d8eb75302b13a7fd831478413d124d618Vikas Arora 711a059123d8eb75302b13a7fd831478413d124d618Vikas Arorastatic SkTRegistry<SkImageDecoder*, SkStream*> gDReg(sk_libwebp_dfactory); 712a059123d8eb75302b13a7fd831478413d124d618Vikas Arorastatic SkTRegistry<SkImageEncoder*, SkImageEncoder::Type> gEReg(sk_libwebp_efactory); 713