SkCodec::Result SkRawCodec::onGetPixels(const SkImageInfo& requestedInfo, void* dst,
size_t dstRowBytes, const Options& options,
SkPMColor ctable[], int* ctableCount,
int* rowsDecoded) {
if (!conversion_possible(requestedInfo, this->getInfo())) {
SkCodecPrintf("Error: cannot convert input type to output type.\n");
return kInvalidConversion;
}
SkAutoTDelete<SkSwizzler> swizzler(SkSwizzler::CreateSwizzler(
SkSwizzler::kRGB, nullptr, requestedInfo, options));
SkASSERT(swizzler);
const int width = requestedInfo.width();
const int height = requestedInfo.height();
SkAutoTDelete<dng_image> image(fDngImage->render(width, height));
if (!image) {
return kInvalidInput;
}
// Because the DNG SDK can not guarantee to render to requested size, we allow a small
// difference. Only the overlapping region will be converted.
const float maxDiffRatio = 1.03f;
const dng_point& imageSize = image->Size();
if (imageSize.h / width > maxDiffRatio || imageSize.h < width ||
imageSize.v / height > maxDiffRatio || imageSize.v < height) {
return SkCodec::kInvalidScale;
}
void* dstRow = dst;
SkAutoTMalloc<uint8_t> srcRow(width * 3);
dng_pixel_buffer buffer;
buffer.fData = &srcRow[0];
buffer.fPlane = 0;
buffer.fPlanes = 3;
buffer.fColStep = buffer.fPlanes;
buffer.fPlaneStep = 1;
buffer.fPixelType = ttByte;
buffer.fPixelSize = sizeof(uint8_t);
buffer.fRowStep = width * 3;
for (int i = 0; i < height; ++i) {
buffer.fArea = dng_rect(i, 0, i + 1, width);
try {
image->Get(buffer, dng_image::edge_zero);
} catch (...) {
*rowsDecoded = i;
return kIncompleteInput;
}
swizzler->swizzle(dstRow, &srcRow[0]);
dstRow = SkTAddOffset<void>(dstRow, dstRowBytes);
}
return kSuccess;
}
SkCodec::Result SkRawCodec::onGetPixels(const SkImageInfo& dstInfo, void* dst,
size_t dstRowBytes, const Options& options,
SkPMColor ctable[], int* ctableCount,
int* rowsDecoded) {
if (!conversion_possible(dstInfo, this->getInfo()) ||
!this->initializeColorXform(dstInfo, options.fPremulBehavior))
{
SkCodecPrintf("Error: cannot convert input type to output type.\n");
return kInvalidConversion;
}
static const SkColorType kXformSrcColorType = kRGBA_8888_SkColorType;
SkImageInfo swizzlerInfo = dstInfo;
std::unique_ptr<uint32_t[]> xformBuffer = nullptr;
if (this->colorXform()) {
swizzlerInfo = swizzlerInfo.makeColorType(kXformSrcColorType);
xformBuffer.reset(new uint32_t[dstInfo.width()]);
}
std::unique_ptr<SkSwizzler> swizzler(SkSwizzler::CreateSwizzler(
this->getEncodedInfo(), nullptr, swizzlerInfo, options));
SkASSERT(swizzler);
const int width = dstInfo.width();
const int height = dstInfo.height();
std::unique_ptr<dng_image> image(fDngImage->render(width, height));
if (!image) {
return kInvalidInput;
}
// Because the DNG SDK can not guarantee to render to requested size, we allow a small
// difference. Only the overlapping region will be converted.
const float maxDiffRatio = 1.03f;
const dng_point& imageSize = image->Size();
if (imageSize.h / (float) width > maxDiffRatio || imageSize.h < width ||
imageSize.v / (float) height > maxDiffRatio || imageSize.v < height) {
return SkCodec::kInvalidScale;
}
void* dstRow = dst;
SkAutoTMalloc<uint8_t> srcRow(width * 3);
dng_pixel_buffer buffer;
buffer.fData = &srcRow[0];
buffer.fPlane = 0;
buffer.fPlanes = 3;
buffer.fColStep = buffer.fPlanes;
buffer.fPlaneStep = 1;
buffer.fPixelType = ttByte;
buffer.fPixelSize = sizeof(uint8_t);
buffer.fRowStep = width * 3;
for (int i = 0; i < height; ++i) {
buffer.fArea = dng_rect(i, 0, i + 1, width);
try {
image->Get(buffer, dng_image::edge_zero);
} catch (...) {
*rowsDecoded = i;
return kIncompleteInput;
}
if (this->colorXform()) {
swizzler->swizzle(xformBuffer.get(), &srcRow[0]);
const SkColorSpaceXform::ColorFormat srcFormat =
select_xform_format(kXformSrcColorType);
const SkColorSpaceXform::ColorFormat dstFormat =
select_xform_format(dstInfo.colorType());
this->colorXform()->apply(dstFormat, dstRow, srcFormat, xformBuffer.get(),
dstInfo.width(), kOpaque_SkAlphaType);
dstRow = SkTAddOffset<void>(dstRow, dstRowBytes);
} else {
swizzler->swizzle(dstRow, &srcRow[0]);
dstRow = SkTAddOffset<void>(dstRow, dstRowBytes);
}
}
return kSuccess;
}
