#include "SkStream.h"
#include "SkUtils.h"
-static bool equal_modulo_alpha(const SkImageInfo& a, const SkImageInfo& b) {
+namespace {
+bool equal_modulo_alpha(const SkImageInfo& a, const SkImageInfo& b) {
return a.width() == b.width() && a.height() == b.height() &&
a.colorType() == b.colorType();
}
-namespace {
+class DecodingImageGenerator : public SkImageGenerator {
+public:
+ virtual ~DecodingImageGenerator();
+
+ SkData* fData;
+ SkStreamRewindable* fStream;
+ const SkImageInfo fInfo;
+ const int fSampleSize;
+ const bool fDitherImage;
+
+ DecodingImageGenerator(SkData* data,
+ SkStreamRewindable* stream,
+ const SkImageInfo& info,
+ int sampleSize,
+ bool ditherImage);
+
+protected:
+ virtual SkData* onRefEncodedData() SK_OVERRIDE;
+ virtual bool onGetInfo(SkImageInfo* info) SK_OVERRIDE {
+ *info = fInfo;
+ return true;
+ }
+ virtual bool onGetPixels(const SkImageInfo& info,
+ void* pixels, size_t rowBytes,
+ SkPMColor ctable[], int* ctableCount) SK_OVERRIDE;
+
+private:
+ typedef SkImageGenerator INHERITED;
+};
+
/**
* Special allocator used by getPixels(). Uses preallocated memory
* provided if possible, else fall-back on the default allocator
virtual bool allocPixelRef(SkBitmap* bm, SkColorTable* ct) {
if (NULL == fTarget || !equal_modulo_alpha(fInfo, bm->info())) {
// Call default allocator.
- return bm->allocPixels(NULL, ct);
+ return bm->tryAllocPixels(NULL, ct);
}
// TODO(halcanary): verify that all callers of this function
// will respect new RowBytes. Will be moot once rowbytes belongs
// to PixelRef.
- bm->installPixels(fInfo, fTarget, fRowBytes, NULL, NULL);
+ bm->installPixels(fInfo, fTarget, fRowBytes, ct, NULL, NULL);
fTarget = NULL; // never alloc same pixels twice!
return true;
}
#endif // SK_DEBUG
-} // namespace
////////////////////////////////////////////////////////////////////////////////
-SkDecodingImageGenerator::SkDecodingImageGenerator(
+DecodingImageGenerator::DecodingImageGenerator(
SkData* data,
SkStreamRewindable* stream,
const SkImageInfo& info,
SkSafeRef(fData); // may be NULL.
}
-SkDecodingImageGenerator::~SkDecodingImageGenerator() {
+DecodingImageGenerator::~DecodingImageGenerator() {
SkSafeUnref(fData);
fStream->unref();
}
-bool SkDecodingImageGenerator::getInfo(SkImageInfo* info) {
- if (info != NULL) {
- *info = fInfo;
- }
- return true;
-}
-
-SkData* SkDecodingImageGenerator::refEncodedData() {
+SkData* DecodingImageGenerator::onRefEncodedData() {
// This functionality is used in `gm --serialize`
// Does not encode options.
- if (fData != NULL) {
- return SkSafeRef(fData);
- }
- // TODO(halcanary): SkStreamRewindable needs a refData() function
- // which returns a cheap copy of the underlying data.
- if (!fStream->rewind()) {
- return NULL;
- }
- size_t length = fStream->getLength();
- if (0 == length) {
- return NULL;
+ if (NULL == fData) {
+ // TODO(halcanary): SkStreamRewindable needs a refData() function
+ // which returns a cheap copy of the underlying data.
+ if (!fStream->rewind()) {
+ return NULL;
+ }
+ size_t length = fStream->getLength();
+ if (length) {
+ fData = SkData::NewFromStream(fStream, length);
+ }
}
- void* buffer = sk_malloc_flags(length, 0);
- SkCheckResult(fStream->read(buffer, length), length);
- fData = SkData::NewFromMalloc(buffer, length);
return SkSafeRef(fData);
}
-bool SkDecodingImageGenerator::getPixels(const SkImageInfo& info,
- void* pixels,
- size_t rowBytes) {
- if (NULL == pixels) {
- return false;
- }
+bool DecodingImageGenerator::onGetPixels(const SkImageInfo& info,
+ void* pixels, size_t rowBytes,
+ SkPMColor ctableEntries[], int* ctableCount) {
if (fInfo != info) {
// The caller has specified a different info. This is an
// error for this kind of SkImageGenerator. Use the Options
// to change the settings.
return false;
}
- if (info.minRowBytes() > rowBytes) {
- // The caller has specified a bad rowBytes.
- return false;
- }
SkAssertResult(fStream->rewind());
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(fStream));
}
decoder->setDitherImage(fDitherImage);
decoder->setSampleSize(fSampleSize);
+ decoder->setRequireUnpremultipliedColors(info.alphaType() == kUnpremul_SkAlphaType);
SkBitmap bitmap;
TargetAllocator allocator(fInfo, pixels, rowBytes);
decoder->setAllocator(&allocator);
- // TODO: need to be able to pass colortype directly to decoder
- SkBitmap::Config legacyConfig = SkColorTypeToBitmapConfig(info.colorType());
- bool success = decoder->decode(fStream, &bitmap, legacyConfig,
+ bool success = decoder->decode(fStream, &bitmap, info.colorType(),
SkImageDecoder::kDecodePixels_Mode);
decoder->setAllocator(NULL);
if (!success) {
} else {
SkASSERT(check_alpha(info.alphaType(), bitmap.alphaType()));
}
- return true;
-}
-SkImageGenerator* SkDecodingImageGenerator::Create(
- SkData* data,
- const SkDecodingImageGenerator::Options& opts) {
- SkASSERT(data != NULL);
- if (NULL == data) {
- return NULL;
- }
- SkStreamRewindable* stream = SkNEW_ARGS(SkMemoryStream, (data));
- SkASSERT(stream != NULL);
- SkASSERT(stream->unique());
- return SkDecodingImageGenerator::Create(data, stream, opts);
-}
-
-SkImageGenerator* SkDecodingImageGenerator::Create(
- SkStreamRewindable* stream,
- const SkDecodingImageGenerator::Options& opts) {
- SkASSERT(stream != NULL);
- SkASSERT(stream->unique());
- if ((stream == NULL) || !stream->unique()) {
- SkSafeUnref(stream);
- return NULL;
+ if (kIndex_8_SkColorType == info.colorType()) {
+ if (kIndex_8_SkColorType != bitmap.colorType()) {
+ return false; // they asked for Index8, but we didn't receive that from decoder
+ }
+ SkColorTable* ctable = bitmap.getColorTable();
+ if (NULL == ctable) {
+ return false;
+ }
+ const int count = ctable->count();
+ memcpy(ctableEntries, ctable->lockColors(), count * sizeof(SkPMColor));
+ ctable->unlockColors();
+ *ctableCount = count;
}
- return SkDecodingImageGenerator::Create(NULL, stream, opts);
+ return true;
}
// A contructor-type function that returns NULL on failure. This
// prevents the returned SkImageGenerator from ever being in a bad
// state. Called by both Create() functions
-SkImageGenerator* SkDecodingImageGenerator::Create(
+SkImageGenerator* CreateDecodingImageGenerator(
SkData* data,
SkStreamRewindable* stream,
const SkDecodingImageGenerator::Options& opts) {
SkASSERT(stream);
SkAutoTUnref<SkStreamRewindable> autoStream(stream); // always unref this.
- if (opts.fUseRequestedColorType &&
- (kIndex_8_SkColorType == opts.fRequestedColorType)) {
- // We do not support indexed color with SkImageGenerators,
- return NULL;
- }
SkAssertResult(autoStream->rewind());
SkAutoTDelete<SkImageDecoder> decoder(SkImageDecoder::Factory(autoStream));
if (NULL == decoder.get()) {
}
SkBitmap bitmap;
decoder->setSampleSize(opts.fSampleSize);
- if (!decoder->decode(stream, &bitmap,
- SkImageDecoder::kDecodeBounds_Mode)) {
+ decoder->setRequireUnpremultipliedColors(opts.fRequireUnpremul);
+ if (!decoder->decode(stream, &bitmap, SkImageDecoder::kDecodeBounds_Mode)) {
return NULL;
}
- if (bitmap.config() == SkBitmap::kNo_Config) {
+ if (kUnknown_SkColorType == bitmap.colorType()) {
return NULL;
}
SkImageInfo info = bitmap.info();
- if (!opts.fUseRequestedColorType) {
- // Use default
- if (kIndex_8_SkColorType == bitmap.colorType()) {
- // We don't support kIndex8 because we don't support
- // colortables in this workflow.
- info.fColorType = kPMColor_SkColorType;
- }
- } else {
+ if (opts.fUseRequestedColorType && (opts.fRequestedColorType != info.colorType())) {
if (!bitmap.canCopyTo(opts.fRequestedColorType)) {
SkASSERT(bitmap.colorType() != opts.fRequestedColorType);
return NULL; // Can not translate to needed config.
}
- info.fColorType = opts.fRequestedColorType;
+ info = info.makeColorType(opts.fRequestedColorType);
+ }
+
+ if (opts.fRequireUnpremul && info.alphaType() != kOpaque_SkAlphaType) {
+ info = info.makeAlphaType(kUnpremul_SkAlphaType);
+ }
+
+ SkAlphaType newAlphaType = info.alphaType();
+ if (!SkColorTypeValidateAlphaType(info.colorType(), info.alphaType(), &newAlphaType)) {
+ return NULL;
}
- return SkNEW_ARGS(SkDecodingImageGenerator,
- (data, autoStream.detach(), info,
+
+ return SkNEW_ARGS(DecodingImageGenerator,
+ (data, autoStream.detach(), info.makeAlphaType(newAlphaType),
opts.fSampleSize, opts.fDitherImage));
}
+
+} // namespace
+
+////////////////////////////////////////////////////////////////////////////////
+
+SkImageGenerator* SkDecodingImageGenerator::Create(
+ SkData* data,
+ const SkDecodingImageGenerator::Options& opts) {
+ SkASSERT(data != NULL);
+ if (NULL == data) {
+ return NULL;
+ }
+ SkStreamRewindable* stream = SkNEW_ARGS(SkMemoryStream, (data));
+ SkASSERT(stream != NULL);
+ SkASSERT(stream->unique());
+ return CreateDecodingImageGenerator(data, stream, opts);
+}
+
+SkImageGenerator* SkDecodingImageGenerator::Create(
+ SkStreamRewindable* stream,
+ const SkDecodingImageGenerator::Options& opts) {
+ SkASSERT(stream != NULL);
+ SkASSERT(stream->unique());
+ if ((stream == NULL) || !stream->unique()) {
+ SkSafeUnref(stream);
+ return NULL;
+ }
+ return CreateDecodingImageGenerator(NULL, stream, opts);
+}
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