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Load .ico files containing PNG images

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This commit is contained in:
Thomas Bernard 2018-01-17 10:21:34 +01:00
parent 37a5a0a85c
commit d9ca2e1092
1 changed files with 74 additions and 35 deletions
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45
src/fileformats.c
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@ -2033,11 +2033,39 @@ void Load_ICO(T_IO_Context * context)
}
else
{
T_BMP_Header bmpheader;
byte png_header[8];
entry = images + i;
fseek(file, entry->offset, SEEK_SET);
// TODO : detect PNG icons
// detect PNG icons
// Load header (8 first bytes)
if (!Read_bytes(file,png_header,8))
{
File_error = 1;
}
else
{
// Do we recognize a png file signature ?
#ifndef __no_pnglib__
if (png_sig_cmp(png_header, 0, 8) == 0)
{
Load_PNG_Sub(context, file);
}
#else
if (0 = memcmp(png_header, "\x89PNG", 4))
{
// NO PNG Support
Warning("PNG Signature : Compiled without libpng support");
File_error = 2;
}
#endif
else
{
T_BMP_Header bmpheader;
fseek(file, -8, SEEK_CUR); // back
// BMP
if (Read_dword_le(file,&(bmpheader.Size_2)) // 40
&& Read_dword_le(file,&(bmpheader.Width))
&& Read_dword_le(file,(dword *)&(bmpheader.Height))
@ -2055,7 +2083,6 @@ void Load_ICO(T_IO_Context * context)
nb_colors=bmpheader.Nb_Clr;
else
nb_colors=1<<bmpheader.Nb_bits;
printf("size=%d width=%d height=%d planes=%d nbbits=%d nb_colors=%d\n", bmpheader.Size_2, bmpheader.Width, bmpheader.Height, bmpheader.Planes, bmpheader.Nb_bits, nb_colors);
// bmpheader.Width != entry.width...
// Image 16/24/32 bits
if (bmpheader.Nb_bits == 16)
@ -2073,12 +2100,24 @@ void Load_ICO(T_IO_Context * context)
Pre_load(context, bmpheader.Width,bmpheader.Height/2,0/*file_size*/,FORMAT_ICO,PIXEL_SIMPLE,(entry->bpp > 8));
if (entry->bpp <= 8)
Load_BMP_Palette(context, file, nb_colors, 0);
else
{
if (bmpheader.Compression == 3) // BI_BITFIELDS
{
if (!Read_dword_le(file,&mask[0]) ||
!Read_dword_le(file,&mask[1]) ||
!Read_dword_le(file,&mask[2]))
File_error=2;
}
}
if (File_error == 0)
{
Load_BMP_Pixels(context, file, bmpheader.Compression, bmpheader.Nb_bits, (bmpheader.Height < 0) ? 1 : 0, mask);
}
}
}
}
}
free(images);
}
fclose(file);