Support of .ICO file loading
only loading the biggest icon see http://pulkomandy.tk/projects/GrafX2/ticket/69
This commit is contained in:
Thomas Bernard
parent
c2c36849b5
commit
c2486ed629
@ -137,6 +137,7 @@ enum FILE_FORMATS
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FORMAT_CM5,
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FORMAT_PPH,
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FORMAT_XPM,
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FORMAT_ICO,
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FORMAT_MISC, ///< Must be last of enum: others formats recognized by SDL_image
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};
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@ -2,6 +2,7 @@
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*/
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/* Grafx2 - The Ultimate 256-color bitmap paint program
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Copyright 2018 Thomas Bernard
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Copyright 2011 Pawel Góralski
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Copyright 2009 Petter Lindquist
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Copyright 2008 Yves Rizoud
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@ -1897,6 +1898,192 @@ void Save_BMP(T_IO_Context * context)
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}
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//////////////////////////////////// ICO ////////////////////////////////////
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typedef struct {
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byte width; //Specifies image width in pixels. Value 0 means image width is 256 pixels.
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byte height; //Specifies image height in pixels. Value 0 means image height is 256 pixels.
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byte ncolors; //0 for image without palette
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byte reserved;
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word planes; // (hotspot X for CUR files)
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word bpp; // (hotspot Y for CUR files)
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dword bytecount;
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dword offset;
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} T_ICO_ImageEntry;
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void Test_ICO(T_IO_Context * context)
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{
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char filename[MAX_PATH_CHARACTERS];
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FILE *file;
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struct {
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word Reserved;
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word Type; // Specifies image type: 1 for icon (.ICO) image, 2 for cursor (.CUR) image. Other values are invalid.
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word Count; // Specifies number of images in the file.
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} header;
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File_error=1;
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Get_full_filename(filename, context->File_name, context->File_directory);
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printf("Test_ICO(%p) %s\n", context, filename);
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if ((file=fopen(filename, "rb")))
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{
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if (Read_word_le(file,&(header.Reserved))
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&& Read_word_le(file,&(header.Type))
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&& Read_word_le(file,&(header.Count)))
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{
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printf("type=%d count=%d\n", header.Type, header.Count);
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if (header.Reserved == 0 && header.Type <= 2 && header.Count > 0)
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File_error=0;
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}
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fclose(file);
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}
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}
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void Load_ICO(T_IO_Context * context)
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{
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char filename[MAX_PATH_CHARACTERS];
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FILE *file;
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struct {
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word Reserved;
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word Type; // Specifies image type: 1 for icon (.ICO) image, 2 for cursor (.CUR) image. Other values are invalid.
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word Count; // Specifies number of images in the file.
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} header;
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T_ICO_ImageEntry * images;
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T_ICO_ImageEntry * entry;
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unsigned int i;
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word width, max_width = 0;
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word max_bpp = 0;
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word min_bpp = 0xffff;
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dword mask[3]; // R G B
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File_error=0;
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Get_full_filename(filename, context->File_name, context->File_directory);
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printf("Load_ICO(%p)\n", context);
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if ((file=fopen(filename, "rb")))
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{
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if (Read_word_le(file,&(header.Reserved))
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&& Read_word_le(file,&(header.Type))
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&& Read_word_le(file,&(header.Count)))
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{
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printf("type=%d count=%d\n", header.Type, header.Count);
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images = malloc(sizeof(T_ICO_ImageEntry) * header.Count);
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if (images == NULL)
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{
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fclose(file);
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File_error=1;
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return;
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}
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for (i = 0; i < header.Count; i++) {
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entry = images + i;
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if (!Read_byte(file,&entry->width)
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|| !Read_byte(file,&entry->height)
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|| !Read_byte(file,&entry->ncolors)
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|| !Read_byte(file,&entry->reserved)
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|| !Read_word_le(file,&entry->planes)
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|| !Read_word_le(file,&entry->bpp)
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|| !Read_dword_le(file,&entry->bytecount)
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|| !Read_dword_le(file,&entry->offset))
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{
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free(images);
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fclose(file);
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File_error=1;
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return;
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}
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width = entry->width;
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if (width == 0) width = 256;
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if (width > max_width) max_width = width;
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printf("%2d: %3dx%3d %dcolors planes=%d bpp=%d\n", i, entry->width, entry->height, entry->ncolors, entry->planes, entry->bpp);
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}
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// select the picture with the maximum width and 256 colors or less
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printf("max width = %d\n", max_width);
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for (i = 0; i < header.Count; i++)
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{
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if (images[i].width == (max_width & 0xff))
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{
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if (images[i].bpp == 8)
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break;
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if (images[i].bpp < 8 && images[i].bpp > max_bpp)
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max_bpp = images[i].bpp;
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if (images[i].bpp < min_bpp)
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min_bpp = images[i].bpp;
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}
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}
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printf("i=%d max_bpp=%d min_bpp=%d\n", i, max_bpp, min_bpp);
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if (i >= header.Count)
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{
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// 256 color not found, select another one
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for (i = 0; i < header.Count; i++)
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{
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if (images[i].width == (max_width & 0xff))
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{
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if ((max_bpp != 0 && images[i].bpp == max_bpp)
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|| (images[i].bpp == min_bpp))
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{
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break;
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}
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}
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}
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}
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if (i >= header.Count)
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{
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File_error=2;
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}
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else
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{
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T_BMP_Header bmpheader;
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entry = images + i;
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fseek(file, entry->offset, SEEK_SET);
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// TODO : detect PNG icons
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if (Read_dword_le(file,&(bmpheader.Size_2)) // 40
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&& Read_dword_le(file,&(bmpheader.Width))
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&& Read_dword_le(file,(dword *)&(bmpheader.Height))
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&& Read_word_le(file,&(bmpheader.Planes))
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&& Read_word_le(file,&(bmpheader.Nb_bits))
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&& Read_dword_le(file,&(bmpheader.Compression))
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&& Read_dword_le(file,&(bmpheader.Size_3))
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&& Read_dword_le(file,&(bmpheader.XPM))
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&& Read_dword_le(file,&(bmpheader.YPM))
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&& Read_dword_le(file,&(bmpheader.Nb_Clr))
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&& Read_dword_le(file,&(bmpheader.Clr_Imprt)) )
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{
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word nb_colors = 0;
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if (bmpheader.Nb_Clr != 0)
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nb_colors=bmpheader.Nb_Clr;
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else
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nb_colors=1<<bmpheader.Nb_bits;
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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);
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// bmpheader.Width != entry.width...
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// Image 16/24/32 bits
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if (bmpheader.Nb_bits == 16)
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{
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mask[0] = 0x00007C00;
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mask[1] = 0x000003E0;
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mask[2] = 0x0000001F;
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}
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else
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{
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mask[0] = 0x00FF0000;
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mask[1] = 0x0000FF00;
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mask[2] = 0x000000FF;
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}
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Pre_load(context, bmpheader.Width,bmpheader.Height/2,0/*file_size*/,FORMAT_ICO,PIXEL_SIMPLE,(entry->bpp > 8));
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if (entry->bpp <= 8)
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Load_BMP_Palette(context, file, nb_colors, 0);
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if (File_error == 0)
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{
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Load_BMP_Pixels(context, file, bmpheader.Compression, bmpheader.Nb_bits, (bmpheader.Height < 0) ? 1 : 0, mask);
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}
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}
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}
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free(images);
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}
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fclose(file);
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} else {
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File_error=1;
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}
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}
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//////////////////////////////////// GIF ////////////////////////////////////
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typedef struct
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{
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@ -145,6 +145,10 @@ void Save_PPH(T_IO_Context *);
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// Loading is done through SDL_Image
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void Save_XPM(T_IO_Context*);
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// -- ICO (Windows ICO)
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void Test_ICO(T_IO_Context *);
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void Load_ICO(T_IO_Context *);
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// -- PNG -------------------------------------------------------------------
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#ifndef __no_pnglib__
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void Test_PNG(T_IO_Context *);
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@ -184,6 +188,7 @@ T_Format File_formats[] = {
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{FORMAT_CM5, " cm5", Test_CM5, Load_CM5, Save_CM5, 0, 0, 1, "cm5", "cm5"},
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{FORMAT_PPH, " pph", Test_PPH, Load_PPH, Save_PPH, 0, 0, 1, "pph", "pph"},
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{FORMAT_XPM, " xpm", NULL, NULL, Save_XPM, 0, 0, 0, "xpm", "xpm"},
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{FORMAT_ICO, " ico", Test_ICO, Load_ICO, NULL, 0, 0, 0, "ico", "ico;cur"},
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{FORMAT_MISC,"misc.",NULL, NULL, NULL, 0, 0, 0, "", "tga;pnm;xpm;xcf;jpg;jpeg;tif;tiff;ico"},
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};
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