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Unified Diff: src/images/SkImageDecoder_libjpeg.cpp

Issue 1836493002: Rename encoders to Sk*ImageEncoder (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 4 years, 9 months ago
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Index: src/images/SkImageDecoder_libjpeg.cpp
diff --git a/src/images/SkImageDecoder_libjpeg.cpp b/src/images/SkImageDecoder_libjpeg.cpp
deleted file mode 100644
index fd10bdbdf602cba14602f00476192ff23e32a312..0000000000000000000000000000000000000000
--- a/src/images/SkImageDecoder_libjpeg.cpp
+++ /dev/null
@@ -1,282 +0,0 @@
-/*
- * Copyright 2007 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkImageEncoder.h"
-#include "SkJpegUtility.h"
-#include "SkColorPriv.h"
-#include "SkDither.h"
-#include "SkStream.h"
-#include "SkTemplates.h"
-#include "SkTime.h"
-#include "SkUtils.h"
-#include "SkRTConf.h"
-#include "SkRect.h"
-#include "SkCanvas.h"
-
-
-#include <stdio.h>
-extern "C" {
- #include "jpeglib.h"
- #include "jerror.h"
-}
-
-// These enable timing code that report milliseconds for an encoding
-//#define TIME_ENCODE
-
-// this enables our rgb->yuv code, which is faster than libjpeg on ARM
-#define WE_CONVERT_TO_YUV
-
-///////////////////////////////////////////////////////////////////////////////
-
-#include "SkColorPriv.h"
-
-// taken from jcolor.c in libjpeg
-#if 0 // 16bit - precise but slow
- #define CYR 19595 // 0.299
- #define CYG 38470 // 0.587
- #define CYB 7471 // 0.114
-
- #define CUR -11059 // -0.16874
- #define CUG -21709 // -0.33126
- #define CUB 32768 // 0.5
-
- #define CVR 32768 // 0.5
- #define CVG -27439 // -0.41869
- #define CVB -5329 // -0.08131
-
- #define CSHIFT 16
-#else // 8bit - fast, slightly less precise
- #define CYR 77 // 0.299
- #define CYG 150 // 0.587
- #define CYB 29 // 0.114
-
- #define CUR -43 // -0.16874
- #define CUG -85 // -0.33126
- #define CUB 128 // 0.5
-
- #define CVR 128 // 0.5
- #define CVG -107 // -0.41869
- #define CVB -21 // -0.08131
-
- #define CSHIFT 8
-#endif
-
-static void rgb2yuv_32(uint8_t dst[], SkPMColor c) {
- int r = SkGetPackedR32(c);
- int g = SkGetPackedG32(c);
- int b = SkGetPackedB32(c);
-
- int y = ( CYR*r + CYG*g + CYB*b ) >> CSHIFT;
- int u = ( CUR*r + CUG*g + CUB*b ) >> CSHIFT;
- int v = ( CVR*r + CVG*g + CVB*b ) >> CSHIFT;
-
- dst[0] = SkToU8(y);
- dst[1] = SkToU8(u + 128);
- dst[2] = SkToU8(v + 128);
-}
-
-static void rgb2yuv_4444(uint8_t dst[], U16CPU c) {
- int r = SkGetPackedR4444(c);
- int g = SkGetPackedG4444(c);
- int b = SkGetPackedB4444(c);
-
- int y = ( CYR*r + CYG*g + CYB*b ) >> (CSHIFT - 4);
- int u = ( CUR*r + CUG*g + CUB*b ) >> (CSHIFT - 4);
- int v = ( CVR*r + CVG*g + CVB*b ) >> (CSHIFT - 4);
-
- dst[0] = SkToU8(y);
- dst[1] = SkToU8(u + 128);
- dst[2] = SkToU8(v + 128);
-}
-
-static void rgb2yuv_16(uint8_t dst[], U16CPU c) {
- int r = SkGetPackedR16(c);
- int g = SkGetPackedG16(c);
- int b = SkGetPackedB16(c);
-
- int y = ( 2*CYR*r + CYG*g + 2*CYB*b ) >> (CSHIFT - 2);
- int u = ( 2*CUR*r + CUG*g + 2*CUB*b ) >> (CSHIFT - 2);
- int v = ( 2*CVR*r + CVG*g + 2*CVB*b ) >> (CSHIFT - 2);
-
- dst[0] = SkToU8(y);
- dst[1] = SkToU8(u + 128);
- dst[2] = SkToU8(v + 128);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-typedef void (*WriteScanline)(uint8_t* SK_RESTRICT dst,
- const void* SK_RESTRICT src, int width,
- const SkPMColor* SK_RESTRICT ctable);
-
-static void Write_32_YUV(uint8_t* SK_RESTRICT dst,
- const void* SK_RESTRICT srcRow, int width,
- const SkPMColor*) {
- const uint32_t* SK_RESTRICT src = (const uint32_t*)srcRow;
- while (--width >= 0) {
-#ifdef WE_CONVERT_TO_YUV
- rgb2yuv_32(dst, *src++);
-#else
- uint32_t c = *src++;
- dst[0] = SkGetPackedR32(c);
- dst[1] = SkGetPackedG32(c);
- dst[2] = SkGetPackedB32(c);
-#endif
- dst += 3;
- }
-}
-
-static void Write_4444_YUV(uint8_t* SK_RESTRICT dst,
- const void* SK_RESTRICT srcRow, int width,
- const SkPMColor*) {
- const SkPMColor16* SK_RESTRICT src = (const SkPMColor16*)srcRow;
- while (--width >= 0) {
-#ifdef WE_CONVERT_TO_YUV
- rgb2yuv_4444(dst, *src++);
-#else
- SkPMColor16 c = *src++;
- dst[0] = SkPacked4444ToR32(c);
- dst[1] = SkPacked4444ToG32(c);
- dst[2] = SkPacked4444ToB32(c);
-#endif
- dst += 3;
- }
-}
-
-static void Write_16_YUV(uint8_t* SK_RESTRICT dst,
- const void* SK_RESTRICT srcRow, int width,
- const SkPMColor*) {
- const uint16_t* SK_RESTRICT src = (const uint16_t*)srcRow;
- while (--width >= 0) {
-#ifdef WE_CONVERT_TO_YUV
- rgb2yuv_16(dst, *src++);
-#else
- uint16_t c = *src++;
- dst[0] = SkPacked16ToR32(c);
- dst[1] = SkPacked16ToG32(c);
- dst[2] = SkPacked16ToB32(c);
-#endif
- dst += 3;
- }
-}
-
-static void Write_Index_YUV(uint8_t* SK_RESTRICT dst,
- const void* SK_RESTRICT srcRow, int width,
- const SkPMColor* SK_RESTRICT ctable) {
- const uint8_t* SK_RESTRICT src = (const uint8_t*)srcRow;
- while (--width >= 0) {
-#ifdef WE_CONVERT_TO_YUV
- rgb2yuv_32(dst, ctable[*src++]);
-#else
- uint32_t c = ctable[*src++];
- dst[0] = SkGetPackedR32(c);
- dst[1] = SkGetPackedG32(c);
- dst[2] = SkGetPackedB32(c);
-#endif
- dst += 3;
- }
-}
-
-static WriteScanline ChooseWriter(const SkBitmap& bm) {
- switch (bm.colorType()) {
- case kN32_SkColorType:
- return Write_32_YUV;
- case kRGB_565_SkColorType:
- return Write_16_YUV;
- case kARGB_4444_SkColorType:
- return Write_4444_YUV;
- case kIndex_8_SkColorType:
- return Write_Index_YUV;
- default:
- return nullptr;
- }
-}
-
-class SkJPEGImageEncoder : public SkImageEncoder {
-protected:
- virtual bool onEncode(SkWStream* stream, const SkBitmap& bm, int quality) {
-#ifdef TIME_ENCODE
- SkAutoTime atm("JPEG Encode");
-#endif
-
- SkAutoLockPixels alp(bm);
- if (nullptr == bm.getPixels()) {
- return false;
- }
-
- jpeg_compress_struct cinfo;
- skjpeg_error_mgr sk_err;
- skjpeg_destination_mgr sk_wstream(stream);
-
- // allocate these before set call setjmp
- SkAutoTMalloc<uint8_t> oneRow;
-
- cinfo.err = jpeg_std_error(&sk_err);
- sk_err.error_exit = skjpeg_error_exit;
- if (setjmp(sk_err.fJmpBuf)) {
- return false;
- }
-
- // Keep after setjmp or mark volatile.
- const WriteScanline writer = ChooseWriter(bm);
- if (nullptr == writer) {
- return false;
- }
-
- jpeg_create_compress(&cinfo);
- cinfo.dest = &sk_wstream;
- cinfo.image_width = bm.width();
- cinfo.image_height = bm.height();
- cinfo.input_components = 3;
-#ifdef WE_CONVERT_TO_YUV
- cinfo.in_color_space = JCS_YCbCr;
-#else
- cinfo.in_color_space = JCS_RGB;
-#endif
- cinfo.input_gamma = 1;
-
- jpeg_set_defaults(&cinfo);
- cinfo.optimize_coding = TRUE;
- jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
-#ifdef DCT_IFAST_SUPPORTED
- cinfo.dct_method = JDCT_IFAST;
-#endif
-
- jpeg_start_compress(&cinfo, TRUE);
-
- const int width = bm.width();
- uint8_t* oneRowP = oneRow.reset(width * 3);
-
- const SkPMColor* colors = bm.getColorTable() ? bm.getColorTable()->readColors() : nullptr;
- const void* srcRow = bm.getPixels();
-
- while (cinfo.next_scanline < cinfo.image_height) {
- JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */
-
- writer(oneRowP, srcRow, width, colors);
- row_pointer[0] = oneRowP;
- (void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
- srcRow = (const void*)((const char*)srcRow + bm.rowBytes());
- }
-
- jpeg_finish_compress(&cinfo);
- jpeg_destroy_compress(&cinfo);
-
- return true;
- }
-};
-
-///////////////////////////////////////////////////////////////////////////////
-DEFINE_ENCODER_CREATOR(JPEGImageEncoder);
-///////////////////////////////////////////////////////////////////////////////
-
-static SkImageEncoder* sk_libjpeg_efactory(SkImageEncoder::Type t) {
- return (SkImageEncoder::kJPEG_Type == t) ? new SkJPEGImageEncoder : nullptr;
-}
-
-static SkImageEncoder_EncodeReg gEReg(sk_libjpeg_efactory);
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