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Add support for saving 32bpp icons too.

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Save in 32bpp format if alpha channel is present in the image being saved in
ICO format.

See #15918.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76134 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2014-03-12 23:04:24 +00:00
parent 818e5f3a48
commit 64deeb94b9
2 changed files with 23 additions and 9 deletions
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2
docs/changes.txt
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@ -54,7 +54,7 @@ wxMSW:
- Support multiline strings in wxDC::DrawRotatedText() (Artur Wieczorek).
- Fix stretchable spacers in vertical toolbars (Artur Wieczorek).
- Add wxEnhMetaFile::Detach() (Luca Bacci).
- Add support for saving 256*256 24bpp ICOs in PNG format (Artur Wieczorek).
- Add support for saving 256*256 32bpp ICOs in PNG format (Artur Wieczorek).
wxOSX/Cocoa:

30
src/common/imagbmp.cpp
View File

@ -100,9 +100,13 @@ bool wxBMPHandler::SaveDib(wxImage *image,
return false;
}
// get the format of the BMP file to save, else use 24bpp
// For icons, save alpha channel if available.
const bool saveAlpha = !IsBmp && image->HasAlpha();
// get the format of the BMP file to save,
// else (and always if alpha channel is present) use 24bpp
unsigned format = wxBMP_24BPP;
if ( image->HasOption(wxIMAGE_OPTION_BMP_FORMAT) )
if ( image->HasOption(wxIMAGE_OPTION_BMP_FORMAT) && !saveAlpha )
format = image->GetOptionInt(wxIMAGE_OPTION_BMP_FORMAT);
wxUint16 bpp; // # of bits per pixel
@ -138,10 +142,10 @@ bool wxBMPHandler::SaveDib(wxImage *image,
bpp = 8;
palette_size = 256;
}
else // you get 24bpp
else // you get 24bpp or 32bpp with alpha
{
format = wxBMP_24BPP;
bpp = 24;
bpp = saveAlpha ? 32 : 24;
palette_size = 0;
}
@ -351,12 +355,14 @@ bool wxBMPHandler::SaveDib(wxImage *image,
// pointer to the image data, use quantized if available
wxUint8 *data = (wxUint8*) image->GetData();
const unsigned char* const alpha = saveAlpha ? image->GetAlpha() : NULL;
if (q_image) if (q_image->IsOk()) data = (wxUint8*) q_image->GetData();
wxUint8 *buffer = new wxUint8[row_width];
memset(buffer, 0, row_width);
int y; unsigned x;
long int pixel;
const int dstPixLen = saveAlpha ? 4 : 3;
for (y = image->GetHeight() -1; y >= 0; y--)
{
@ -366,9 +372,11 @@ bool wxBMPHandler::SaveDib(wxImage *image,
{
pixel = 3*(y*width + x);
buffer[3*x ] = data[pixel+2];
buffer[3*x + 1] = data[pixel+1];
buffer[3*x + 2] = data[pixel];
buffer[dstPixLen*x ] = data[pixel+2];
buffer[dstPixLen*x + 1] = data[pixel+1];
buffer[dstPixLen*x + 2] = data[pixel];
if ( saveAlpha )
buffer[dstPixLen*x + 3] = alpha[y*width + x];
}
}
else if ((format == wxBMP_8BPP) || // 1 byte per pixel in color
@ -1281,7 +1289,13 @@ bool wxICOHandler::SaveFile(wxImage *image,
const int colours = image->CountColours(257);
int bppFormat;
int bpp;
if ( colours > 256 )
if ( image->HasAlpha() )
{
// Icons with alpha channel are always stored in ARGB format.
bppFormat = wxBMP_24BPP;
bpp = 32;
}
else if ( colours > 256 )
{
bppFormat = wxBMP_24BPP;
bpp = 24;