//==============================================================================
void LowLevelGraphicsPostScriptRenderer::writeImage (const Image& im,
const int sx, const int sy,
const int maxW, const int maxH) const
{
out << "{<\n";
const int w = jmin (maxW, im.getWidth());
const int h = jmin (maxH, im.getHeight());
int charsOnLine = 0;
const Image::BitmapData srcData (im, 0, 0, w, h);
Colour pixel;
for (int y = h; --y >= 0;)
{
for (int x = 0; x < w; ++x)
{
const uint8* pixelData = srcData.getPixelPointer (x, y);
if (x >= sx && y >= sy)
{
if (im.isARGB())
{
PixelARGB p (*(const PixelARGB*) pixelData);
p.unpremultiply();
pixel = Colours::white.overlaidWith (Colour (p.getARGB()));
}
else if (im.isRGB())
{
pixel = Colour (((const PixelRGB*) pixelData)->getARGB());
}
else
{
pixel = Colour ((uint8) 0, (uint8) 0, (uint8) 0, *pixelData);
}
}
else
{
pixel = Colours::transparentWhite;
}
const uint8 pixelValues[3] = { pixel.getRed(), pixel.getGreen(), pixel.getBlue() };
out << String::toHexString (pixelValues, 3, 0);
charsOnLine += 3;
if (charsOnLine > 100)
{
out << '\n';
charsOnLine = 0;
}
}
}
out << "\n>}\n";
}
bool PNGImageFormat::writeImageToStream (const Image& image, OutputStream& out)
{
using namespace pnglibNamespace;
const int width = image.getWidth();
const int height = image.getHeight();
png_structp pngWriteStruct = png_create_write_struct (PNG_LIBPNG_VER_STRING, 0, 0, 0);
if (pngWriteStruct == nullptr)
return false;
png_infop pngInfoStruct = png_create_info_struct (pngWriteStruct);
if (pngInfoStruct == nullptr)
{
png_destroy_write_struct (&pngWriteStruct, (png_infopp) nullptr);
return false;
}
png_set_write_fn (pngWriteStruct, &out, PNGHelpers::writeDataCallback, 0);
png_set_IHDR (pngWriteStruct, pngInfoStruct, (png_uint_32) width, (png_uint_32) height, 8,
image.hasAlphaChannel() ? PNG_COLOR_TYPE_RGB_ALPHA
: PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE,
PNG_FILTER_TYPE_BASE);
HeapBlock<uint8> rowData ((size_t) width * 4);
png_color_8 sig_bit;
sig_bit.red = 8;
sig_bit.green = 8;
sig_bit.blue = 8;
sig_bit.gray = 0;
sig_bit.alpha = 8;
png_set_sBIT (pngWriteStruct, pngInfoStruct, &sig_bit);
png_write_info (pngWriteStruct, pngInfoStruct);
png_set_shift (pngWriteStruct, &sig_bit);
png_set_packing (pngWriteStruct);
const Image::BitmapData srcData (image, Image::BitmapData::readOnly);
for (int y = 0; y < height; ++y)
{
uint8* dst = rowData;
const uint8* src = srcData.getLinePointer (y);
if (image.hasAlphaChannel())
{
for (int i = width; --i >= 0;)
{
PixelARGB p (*(const PixelARGB*) src);
p.unpremultiply();
*dst++ = p.getRed();
*dst++ = p.getGreen();
*dst++ = p.getBlue();
*dst++ = p.getAlpha();
src += srcData.pixelStride;
}
}
else
{
for (int i = width; --i >= 0;)
{
*dst++ = ((const PixelRGB*) src)->getRed();
*dst++ = ((const PixelRGB*) src)->getGreen();
*dst++ = ((const PixelRGB*) src)->getBlue();
src += srcData.pixelStride;
}
}
png_bytep rowPtr = rowData;
png_write_rows (pngWriteStruct, &rowPtr, 1);
}
png_write_end (pngWriteStruct, pngInfoStruct);
png_destroy_write_struct (&pngWriteStruct, &pngInfoStruct);
return true;
}