static HRESULT WINAPI PngDecoder_Frame_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
PngDecoder *This = impl_from_IWICBitmapFrameDecode(iface);
png_uint_32 ret;
png_colorp png_palette;
int num_palette;
WICColor palette[256];
png_bytep trans;
int num_trans;
png_color_16p trans_values;
int i;
HRESULT hr=S_OK;
TRACE("(%p,%p)\n", iface, pIPalette);
EnterCriticalSection(&This->lock);
ret = ppng_get_PLTE(This->png_ptr, This->info_ptr, &png_palette, &num_palette);
if (!ret)
{
hr = WINCODEC_ERR_PALETTEUNAVAILABLE;
goto end;
}
if (num_palette > 256)
{
ERR("palette has %i colors?!\n", num_palette);
hr = E_FAIL;
goto end;
}
for (i=0; i<num_palette; i++)
{
palette[i] = (0xff000000|
png_palette[i].red << 16|
png_palette[i].green << 8|
png_palette[i].blue);
}
ret = ppng_get_tRNS(This->png_ptr, This->info_ptr, &trans, &num_trans, &trans_values);
if (ret)
{
for (i=0; i<num_trans; i++)
{
palette[trans[i]] = 0x00000000;
}
}
end:
LeaveCriticalSection(&This->lock);
if (SUCCEEDED(hr))
hr = IWICPalette_InitializeCustom(pIPalette, palette, num_palette);
return hr;
}
static HRESULT WINAPI PngDecoder_Frame_CopyPalette(IWICBitmapFrameDecode *iface,
IWICPalette *pIPalette)
{
PngDecoder *This = impl_from_frame(iface);
png_uint_32 ret;
png_colorp png_palette;
int num_palette;
WICColor palette[256];
png_bytep trans;
int num_trans;
png_color_16p trans_values;
int i;
TRACE("(%p,%p)\n", iface, pIPalette);
ret = ppng_get_PLTE(This->png_ptr, This->info_ptr, &png_palette, &num_palette);
if (!ret) return WINCODEC_ERR_PALETTEUNAVAILABLE;
if (num_palette > 256)
{
ERR("palette has %i colors?!\n", num_palette);
return E_FAIL;
}
for (i=0; i<num_palette; i++)
{
palette[i] = (0xff000000|
png_palette[i].red << 16|
png_palette[i].green << 8|
png_palette[i].blue);
}
ret = ppng_get_tRNS(This->png_ptr, This->info_ptr, &trans, &num_trans, &trans_values);
if (ret)
{
for (i=0; i<num_trans; i++)
{
palette[trans[i]] = 0x00000000;
}
}
return IWICPalette_InitializeCustom(pIPalette, palette, num_palette);
}
