HRESULT PngDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
PngDecoder *This;
HRESULT ret;
TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
*ppv = NULL;
if (pUnkOuter) return CLASS_E_NOAGGREGATION;
if (!libpng_handle && !load_libpng())
{
ERR("Failed reading PNG because unable to find %s\n",SONAME_LIBPNG);
return E_FAIL;
}
This = HeapAlloc(GetProcessHeap(), 0, sizeof(PngDecoder));
if (!This) return E_OUTOFMEMORY;
This->lpVtbl = &PngDecoder_Vtbl;
This->lpFrameVtbl = &PngDecoder_FrameVtbl;
This->ref = 1;
This->png_ptr = NULL;
This->info_ptr = NULL;
This->end_info = NULL;
This->initialized = FALSE;
This->image_bits = NULL;
ret = IUnknown_QueryInterface((IUnknown*)This, iid, ppv);
IUnknown_Release((IUnknown*)This);
return ret;
}
HRESULT PngDecoder_CreateInstance(REFIID iid, void** ppv)
{
PngDecoder *This;
HRESULT ret;
TRACE("(%s,%p)\n", debugstr_guid(iid), ppv);
*ppv = NULL;
if (!libpng_handle && !load_libpng())
{
ERR("Failed reading PNG because unable to find %s\n",SONAME_LIBPNG);
return E_FAIL;
}
This = HeapAlloc(GetProcessHeap(), 0, sizeof(PngDecoder));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapDecoder_iface.lpVtbl = &PngDecoder_Vtbl;
This->IWICBitmapFrameDecode_iface.lpVtbl = &PngDecoder_FrameVtbl;
This->IWICMetadataBlockReader_iface.lpVtbl = &PngDecoder_BlockVtbl;
This->ref = 1;
This->png_ptr = NULL;
This->info_ptr = NULL;
This->end_info = NULL;
This->initialized = FALSE;
This->image_bits = NULL;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PngDecoder.lock");
ret = IWICBitmapDecoder_QueryInterface(&This->IWICBitmapDecoder_iface, iid, ppv);
IWICBitmapDecoder_Release(&This->IWICBitmapDecoder_iface);
return ret;
}
HRESULT PngEncoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
{
PngEncoder *This;
HRESULT ret;
TRACE("(%p,%s,%p)\n", pUnkOuter, debugstr_guid(iid), ppv);
*ppv = NULL;
if (pUnkOuter) return CLASS_E_NOAGGREGATION;
if (!libpng_handle && !load_libpng())
{
ERR("Failed writing PNG because unable to find %s\n",SONAME_LIBPNG);
return E_FAIL;
}
This = HeapAlloc(GetProcessHeap(), 0, sizeof(PngEncoder));
if (!This) return E_OUTOFMEMORY;
This->IWICBitmapEncoder_iface.lpVtbl = &PngEncoder_Vtbl;
This->IWICBitmapFrameEncode_iface.lpVtbl = &PngEncoder_FrameVtbl;
This->ref = 1;
This->png_ptr = NULL;
This->info_ptr = NULL;
This->stream = NULL;
This->frame_count = 0;
This->frame_initialized = FALSE;
This->format = NULL;
This->info_written = FALSE;
This->width = 0;
This->height = 0;
This->xres = 0.0;
This->yres = 0.0;
This->lines_written = 0;
This->frame_committed = FALSE;
This->committed = FALSE;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PngEncoder.lock");
ret = IWICBitmapEncoder_QueryInterface(&This->IWICBitmapEncoder_iface, iid, ppv);
IWICBitmapEncoder_Release(&This->IWICBitmapEncoder_iface);
return ret;
}
static BOOL SaveIconResAsPNG(const BITMAPINFO *pIcon, const char *png_filename, LPCWSTR commentW)
{
static const char comment_key[] = "Created from";
FILE *fp;
png_structp png_ptr;
png_infop info_ptr;
png_text comment;
int nXORWidthBytes, nANDWidthBytes, color_type = 0, i, j;
BYTE *row, *copy = NULL;
const BYTE *pXOR, *pAND = NULL;
int nWidth = pIcon->bmiHeader.biWidth;
int nHeight = pIcon->bmiHeader.biHeight;
int nBpp = pIcon->bmiHeader.biBitCount;
switch (nBpp)
{
case 32:
color_type |= PNG_COLOR_MASK_ALPHA;
/* fall through */
case 24:
color_type |= PNG_COLOR_MASK_COLOR;
break;
default:
return FALSE;
}
if (!libpng_handle && !load_libpng())
{
WINE_WARN("Unable to load libpng\n");
return FALSE;
}
if (!(fp = fopen(png_filename, "w")))
{
WINE_ERR("unable to open '%s' for writing: %s\n", png_filename, strerror(errno));
return FALSE;
}
nXORWidthBytes = 4 * ((nWidth * nBpp + 31) / 32);
nANDWidthBytes = 4 * ((nWidth + 31 ) / 32);
pXOR = (const BYTE*) pIcon + sizeof(BITMAPINFOHEADER) + pIcon->bmiHeader.biClrUsed * sizeof(RGBQUAD);
if (nHeight > nWidth)
{
nHeight /= 2;
pAND = pXOR + nHeight * nXORWidthBytes;
}
/* Apply mask if present */
if (pAND)
{
RGBQUAD bgColor;
/* copy bytes before modifying them */
copy = HeapAlloc( GetProcessHeap(), 0, nHeight * nXORWidthBytes );
memcpy( copy, pXOR, nHeight * nXORWidthBytes );
pXOR = copy;
/* image and mask are upside down reversed */
row = copy + (nHeight - 1) * nXORWidthBytes;
/* top left corner */
bgColor.rgbRed = row[0];
bgColor.rgbGreen = row[1];
bgColor.rgbBlue = row[2];
bgColor.rgbReserved = 0;
for (i = 0; i < nHeight; i++, row -= nXORWidthBytes)
for (j = 0; j < nWidth; j++, row += nBpp >> 3)
if (MASK(j, i))
{
RGBQUAD *pixel = (RGBQUAD *)row;
pixel->rgbBlue = bgColor.rgbBlue;
pixel->rgbGreen = bgColor.rgbGreen;
pixel->rgbRed = bgColor.rgbRed;
if (nBpp == 32)
pixel->rgbReserved = bgColor.rgbReserved;
}
}
comment.text = NULL;
if (!(png_ptr = ppng_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL)) ||
!(info_ptr = ppng_create_info_struct(png_ptr)))
goto error;
if (setjmp(png_jmpbuf(png_ptr)))
{
/* All future errors jump here */
WINE_ERR("png error\n");
goto error;
}
ppng_init_io(png_ptr, fp);
ppng_set_IHDR(png_ptr, info_ptr, nWidth, nHeight, 8,
color_type,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
/* Set comment */
comment.compression = PNG_TEXT_COMPRESSION_NONE;
comment.key = (png_charp)comment_key;
i = WideCharToMultiByte(CP_UNIXCP, 0, commentW, -1, NULL, 0, NULL, NULL);
comment.text = HeapAlloc(GetProcessHeap(), 0, i);
WideCharToMultiByte(CP_UNIXCP, 0, commentW, -1, comment.text, i, NULL, NULL);
comment.text_length = i - 1;
ppng_set_text(png_ptr, info_ptr, &comment, 1);
ppng_write_info(png_ptr, info_ptr);
ppng_set_bgr(png_ptr);
for (i = nHeight - 1; i >= 0 ; i--)
ppng_write_row(png_ptr, (png_bytep)pXOR + nXORWidthBytes * i);
ppng_write_end(png_ptr, info_ptr);
ppng_destroy_write_struct(&png_ptr, &info_ptr);
if (png_ptr) ppng_destroy_write_struct(&png_ptr, NULL);
fclose(fp);
HeapFree(GetProcessHeap(), 0, copy);
HeapFree(GetProcessHeap(), 0, comment.text);
return TRUE;
error:
if (png_ptr) ppng_destroy_write_struct(&png_ptr, NULL);
fclose(fp);
unlink(png_filename);
HeapFree(GetProcessHeap(), 0, copy);
HeapFree(GetProcessHeap(), 0, comment.text);
return FALSE;
}
