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Diffstat (limited to 'src/codec/SkJpegCodec.cpp')
-rw-r--r--src/codec/SkJpegCodec.cpp117
1 files changed, 17 insertions, 100 deletions
diff --git a/src/codec/SkJpegCodec.cpp b/src/codec/SkJpegCodec.cpp
index c094d50a3b..83656da42d 100644
--- a/src/codec/SkJpegCodec.cpp
+++ b/src/codec/SkJpegCodec.cpp
@@ -11,7 +11,6 @@
#include "SkJpegUtility_codec.h"
#include "SkCodecPriv.h"
#include "SkColorPriv.h"
-#include "SkScaledCodec.h"
#include "SkScanlineDecoder.h"
#include "SkStream.h"
#include "SkTemplates.h"
@@ -150,14 +149,6 @@ SkJpegCodec::SkJpegCodec(const SkImageInfo& srcInfo, SkStream* stream,
{}
/*
- * Return the row bytes of a particular image type and width
- */
-static int get_row_bytes(const j_decompress_ptr dinfo) {
- int colorBytes = (dinfo->out_color_space == JCS_RGB565) ? 2 : dinfo->out_color_components;
- return dinfo->output_width * colorBytes;
-
-}
-/*
* Return a valid set of output dimensions for this decoder, given an input scale
*/
SkISize SkJpegCodec::onGetScaledDimensions(float desiredScale) const {
@@ -267,10 +258,10 @@ bool SkJpegCodec::setOutputColorSpace(const SkImageInfo& dst) {
}
/*
- * Checks if we can natively scale to the requested dimensions and natively scales the
- * dimensions if possible
+ * Checks if we can scale to the requested dimensions and scales the dimensions
+ * if possible
*/
-bool SkJpegCodec::nativelyScaleToDimensions(uint32_t dstWidth, uint32_t dstHeight) {
+bool SkJpegCodec::scaleToDimensions(uint32_t dstWidth, uint32_t dstHeight) {
// libjpeg-turbo can scale to 1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, and 1/1
fDecoderMgr->dinfo()->scale_denom = 8;
fDecoderMgr->dinfo()->scale_num = 8;
@@ -282,10 +273,7 @@ bool SkJpegCodec::nativelyScaleToDimensions(uint32_t dstWidth, uint32_t dstHeigh
if (1 == fDecoderMgr->dinfo()->scale_num ||
dstWidth > fDecoderMgr->dinfo()->output_width ||
dstHeight > fDecoderMgr->dinfo()->output_height) {
- // reset native scale settings on failure because this may be supported by the swizzler
- this->fDecoderMgr->dinfo()->scale_num = 8;
- chromium_jpeg_calc_output_dimensions(this->fDecoderMgr->dinfo());
- return false;
+ return fDecoderMgr->returnFalse("could not scale to requested dimensions");
}
// Try the next scale
@@ -325,7 +313,7 @@ SkCodec::Result SkJpegCodec::onGetPixels(const SkImageInfo& dstInfo,
}
// Perform the necessary scaling
- if (!this->nativelyScaleToDimensions(dstInfo.width(), dstInfo.height())) {
+ if (!this->scaleToDimensions(dstInfo.width(), dstInfo.height())) {
return fDecoderMgr->returnFailure("cannot scale to requested dims", kInvalidScale);
}
@@ -393,47 +381,6 @@ public:
, fOpts()
{}
- /*
- * Return a valid set of output dimensions for this decoder, given an input scale
- */
- SkISize onGetScaledDimensions(float desiredScale) override {
- return fCodec->onGetScaledDimensions(desiredScale);
- }
-
- /*
- * Create the swizzler based on the encoded format.
- * The swizzler is only used for sampling in the x direction.
- */
-
- SkCodec::Result initializeSwizzler(const SkImageInfo& info, const SkCodec::Options& options) {
- SkSwizzler::SrcConfig srcConfig;
- switch (info.colorType()) {
- case kGray_8_SkColorType:
- srcConfig = SkSwizzler::kGray;
- break;
- case kRGBA_8888_SkColorType:
- srcConfig = SkSwizzler::kRGBX;
- break;
- case kBGRA_8888_SkColorType:
- srcConfig = SkSwizzler::kBGRX;
- break;
- case kRGB_565_SkColorType:
- srcConfig = SkSwizzler::kRGB_565;
- break;
- default:
- //would have exited before now if the colorType was supported by jpeg
- SkASSERT(false);
- }
-
- fSwizzler.reset(SkSwizzler::CreateSwizzler(srcConfig, NULL, info, options.fZeroInitialized,
- this->getInfo()));
- if (!fSwizzler) {
- // FIXME: CreateSwizzler could fail for another reason.
- return SkCodec::kUnimplemented;
- }
- return SkCodec::kSuccess;
- }
-
SkCodec::Result onStart(const SkImageInfo& dstInfo, const SkCodec::Options& options,
SkPMColor ctable[], int* ctableCount) override {
@@ -454,23 +401,8 @@ public:
}
// Perform the necessary scaling
- if (!fCodec->nativelyScaleToDimensions(dstInfo.width(), dstInfo.height())) {
- // full native scaling to dstInfo dimensions not supported
-
- if (!SkScaledCodec::DimensionsSupportedForSampling(this->getInfo(), dstInfo)) {
- return SkCodec::kInvalidScale;
- }
- // create swizzler for sampling
- SkCodec::Result result = this->initializeSwizzler(dstInfo, options);
- if (SkCodec::kSuccess != result) {
- SkCodecPrintf("failed to initialize the swizzler.\n");
- return result;
- }
- fStorage.reset(get_row_bytes(fCodec->fDecoderMgr->dinfo()));
- fSrcRow = static_cast<uint8_t*>(fStorage.get());
- } else {
- fSrcRow = NULL;
- fSwizzler.reset(NULL);
+ if (!fCodec->scaleToDimensions(dstInfo.width(), dstInfo.height())) {
+ return SkCodec::kInvalidScale;
}
// Now, given valid output dimensions, we can start the decompress
@@ -501,16 +433,9 @@ public:
if (setjmp(fCodec->fDecoderMgr->getJmpBuf())) {
return fCodec->fDecoderMgr->returnFailure("setjmp", SkCodec::kInvalidInput);
}
- // Read rows one at a time
- JSAMPLE* dstRow;
- if (fSwizzler) {
- // write data to storage row, then sample using swizzler
- dstRow = fSrcRow;
- } else {
- // write data directly to dst
- dstRow = (JSAMPLE*) dst;
- }
+ // Read rows one at a time
+ JSAMPLE* dstRow = (JSAMPLE*) dst;
for (int y = 0; y < count; y++) {
// Read row of the image
uint32_t rowsDecoded =
@@ -527,17 +452,13 @@ public:
// Convert to RGBA if necessary
if (JCS_CMYK == fCodec->fDecoderMgr->dinfo()->out_color_space) {
- convert_CMYK_to_RGBA(dstRow, fCodec->fDecoderMgr->dinfo()->output_width);
+ convert_CMYK_to_RGBA(dstRow, this->dstInfo().width());
}
- if(fSwizzler) {
- // use swizzler to sample row
- fSwizzler->swizzle(dst, dstRow);
- dst = SkTAddOffset<JSAMPLE>(dst, rowBytes);
- } else {
- dstRow = SkTAddOffset<JSAMPLE>(dstRow, rowBytes);
- }
+ // Move to the next row
+ dstRow = SkTAddOffset<JSAMPLE>(dstRow, rowBytes);
}
+
return SkCodec::kSuccess;
}
@@ -545,7 +466,7 @@ public:
// TODO (msarett): Make this a member function and avoid reallocating the
// memory buffer on each call to skip.
#define chromium_jpeg_skip_scanlines(dinfo, count) \
- SkAutoMalloc storage(get_row_bytes(dinfo)); \
+ SkAutoMalloc storage(dinfo->output_width * dinfo->out_color_components); \
uint8_t* storagePtr = static_cast<uint8_t*>(storage.get()); \
for (int y = 0; y < count; y++) { \
chromium_jpeg_read_scanlines(dinfo, &storagePtr, 1); \
@@ -563,16 +484,13 @@ public:
return SkCodec::kSuccess;
}
- SkEncodedFormat onGetEncodedFormat() const override {
- return kJPEG_SkEncodedFormat;
- }
+#ifndef TURBO_HAS_SKIP
+#undef chromium_jpeg_skip_scanlines
+#endif
private:
SkAutoTDelete<SkJpegCodec> fCodec;
- SkAutoMalloc fStorage; // Only used if sampling is needed
- uint8_t* fSrcRow; // Only used if sampling is needed
SkCodec::Options fOpts;
- SkAutoTDelete<SkSwizzler> fSwizzler;
typedef SkScanlineDecoder INHERITED;
};
@@ -584,7 +502,6 @@ SkScanlineDecoder* SkJpegCodec::NewSDFromStream(SkStream* stream) {
}
const SkImageInfo& srcInfo = codec->getInfo();
-
// Return the new scanline decoder
return SkNEW_ARGS(SkJpegScanlineDecoder, (srcInfo, codec.detach()));
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-06 14:59:29 +0000