template <J_COLOR_SPACE colorSpace> bool outputRows(JPEGImageReader* reader, ImageFrame& buffer)
{
JSAMPARRAY samples = reader->samples();
jpeg_decompress_struct* info = reader->info();
int width = info->output_width;
while (info->output_scanline < info->output_height) {
// jpeg_read_scanlines will increase the scanline counter, so we
// save the scanline before calling it.
int y = info->output_scanline;
// Request one scanline: returns 0 or 1 scanlines.
if (jpeg_read_scanlines(info, samples, 1) != 1)
return false;
#if USE(QCMSLIB)
if (reader->colorTransform() && colorSpace == JCS_RGB)
qcms_transform_data(reader->colorTransform(), *samples, *samples, width);
#endif
ImageFrame::PixelData* pixel = buffer.getAddr(0, y);
for (int x = 0; x < width; ++pixel, ++x)
setPixel<colorSpace>(buffer, pixel, samples, x);
}
buffer.setPixelsChanged(true);
return true;
}
void WEBPImageDecoder::applyColorProfile(const uint8_t* data, size_t size, ImageFrame& buffer)
{
int width;
int decodedHeight;
if (!WebPIDecGetRGB(m_decoder, &decodedHeight, &width, 0, 0))
return; // See also https://bugs.webkit.org/show_bug.cgi?id=74062
if (decodedHeight <= 0)
return;
if (!m_haveReadProfile) {
readColorProfile(data, size);
m_haveReadProfile = true;
}
ASSERT(width == scaledSize().width());
ASSERT(decodedHeight <= scaledSize().height());
for (int y = m_decodedHeight; y < decodedHeight; ++y) {
uint8_t* row = reinterpret_cast<uint8_t*>(buffer.getAddr(0, y));
if (qcms_transform* transform = colorTransform())
qcms_transform_data_type(transform, row, row, width, QCMS_OUTPUT_RGBX);
uint8_t* pixel = row;
for (int x = 0; x < width; ++x, pixel += 4)
buffer.setRGBA(x, y, pixel[0], pixel[1], pixel[2], pixel[3]);
}
m_decodedHeight = decodedHeight;
}
bool JPEGImageDecoder::outputScanlines(ImageFrame& buffer)
{
JSAMPARRAY samples = m_reader->samples();
jpeg_decompress_struct* info = m_reader->info();
int width = isScaled ? m_scaledColumns.size() : info->output_width;
while (info->output_scanline < info->output_height) {
// jpeg_read_scanlines will increase the scanline counter, so we
// save the scanline before calling it.
int sourceY = info->output_scanline;
/* Request one scanline. Returns 0 or 1 scanlines. */
if (jpeg_read_scanlines(info, samples, 1) != 1)
return false;
int destY = scaledY(sourceY);
if (destY < 0)
continue;
#if USE(QCMSLIB)
if (m_reader->colorTransform() && colorSpace == JCS_RGB)
qcms_transform_data(m_reader->colorTransform(), *samples, *samples, info->output_width);
#endif
ImageFrame::PixelData* currentAddress = buffer.getAddr(0, destY);
for (int x = 0; x < width; ++x) {
setPixel<colorSpace>(buffer, currentAddress, samples, isScaled ? m_scaledColumns[x] : x);
++currentAddress;
}
}
return true;
}
