now detects 1bit BMP files too and adjusts to that, which makes things
simpler git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1881 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Daniel Stenberg
parent
fa54e94a7a
commit
793ca18310
1 changed files with 124 additions and 83 deletions
207
tools/bmp2rb.c
207
tools/bmp2rb.c
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@ -94,93 +94,102 @@ int read_bmp_file(char* filename,
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int *get_height, /* in pixels */
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char **bitmap)
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{
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struct Fileheader fh;
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struct RGBQUAD palette[2]; /* two colors only */
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struct Fileheader fh;
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struct RGBQUAD palette[2]; /* two colors only */
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unsigned int bitmap_width, bitmap_height;
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unsigned int bitmap_width, bitmap_height;
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long PaddedWidth;
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int background;
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int fd = open(filename, O_RDONLY);
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long size;
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unsigned int row, col;
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int l;
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unsigned char *bmp;
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int width;
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long PaddedWidth;
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int background;
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int fd = open(filename, O_RDONLY);
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long size;
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unsigned int row, col;
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int l;
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unsigned char *bmp;
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int width;
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int depth;
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if(fd == -1)
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{
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debugf("error - can't open '%s'\n", filename);
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return 1;
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}
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else
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if(fd == -1)
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{
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debugf("error - can't open '%s'\n", filename);
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return 1;
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}
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else
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{
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if(read(fd, &fh, sizeof(struct Fileheader)) !=
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sizeof(struct Fileheader))
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{
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debugf("error - can't Read Fileheader Stucture\n");
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close(fd);
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return 2;
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}
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{
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debugf("error - can't Read Fileheader Stucture\n");
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close(fd);
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return 2;
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}
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/* Exit if not monochrome */
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if(readshort(fh.BitCount) > 8)
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{
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debugf("error - Bitmap must be less than 8, got %d\n",
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readshort(fh.BitCount));
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close(fd);
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return 2;
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}
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/* Exit if more than 8 bits */
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depth = readshort(fh.BitCount);
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if(depth > 8)
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{
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debugf("error - Bitmap uses more than 8 bit depth, got %d\n",
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depth);
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close(fd);
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return 2;
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}
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/* Exit if too wide */
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if(readlong(fh.Width) > 112)
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{
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debugf("error - Bitmap is too wide (%d pixels, max is 112)\n",
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readlong(fh.Width));
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close(fd);
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return 3;
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}
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/* Exit if too wide */
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if(readlong(fh.Width) > 112)
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{
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debugf("error - Bitmap is too wide (%d pixels, max is 112)\n",
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readlong(fh.Width));
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close(fd);
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return 3;
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}
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/* Exit if too high */
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if(readlong(fh.Height) > 64)
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{
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debugf("error - Bitmap is too high (%d pixels, max is 64)\n",
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readlong(fh.Height));
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close(fd);
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return 4;
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}
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/* Exit if too high */
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if(readlong(fh.Height) > 64)
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{
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debugf("error - Bitmap is too high (%d pixels, max is 64)\n",
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readlong(fh.Height));
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close(fd);
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return 4;
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}
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for(l=0;l < 2;l++)
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{
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if(read(fd, &palette[l],sizeof(struct RGBQUAD)) !=
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sizeof(struct RGBQUAD))
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{
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debugf("error - Can't read bitmap's color palette\n");
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close(fd);
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return 5;
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}
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}
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if(depth == 8 ) {
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/* pass the other palettes */
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lseek(fd, 254*sizeof(struct RGBQUAD), SEEK_CUR);
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}
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for(l=0;l < 2;l++)
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{
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if(read(fd, &palette[l],sizeof(struct RGBQUAD)) !=
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sizeof(struct RGBQUAD))
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{
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debugf("error - Can't read bitmap's color palette\n");
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close(fd);
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return 5;
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}
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}
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/* pass the other palettes */
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lseek(fd, 254*sizeof(struct RGBQUAD), SEEK_CUR);
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/* Try to guess the foreground and background colors.
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We assume that the foreground color is the darkest. */
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if(((int)palette[0].rgbRed +
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(int)palette[0].rgbGreen +
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(int)palette[0].rgbBlue) >
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((int)palette[1].rgbRed +
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(int)palette[1].rgbGreen +
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(int)palette[1].rgbBlue))
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{
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/* Try to guess the foreground and background colors.
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We assume that the foreground color is the darkest. */
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if(((int)palette[0].rgbRed +
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(int)palette[0].rgbGreen +
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(int)palette[0].rgbBlue) >
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((int)palette[1].rgbRed +
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(int)palette[1].rgbGreen +
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(int)palette[1].rgbBlue))
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{
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background = 0;
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}
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else
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{
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}
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else
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{
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background = 1;
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}
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}
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width = readlong(fh.Width);
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PaddedWidth = ((width+3)&(~0x3));
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if(depth == 8)
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PaddedWidth = ((width+3)&(~0x3)); /* aligned 4-bytes boundaries */
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else
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PaddedWidth = ((width+31)&(~0x1f))/8;
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size = PaddedWidth*readlong(fh.Height);
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bmp = (unsigned char *)malloc(size);
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@ -207,18 +216,50 @@ int read_bmp_file(char* filename,
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*get_width = bitmap_width;
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*get_height = bitmap_height;
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/* Now convert the bitmap into an array with 1 byte per pixel,
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exactly the size of the image */
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for(row = 0;row < bitmap_height;row++) {
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for(col = 0;col < bitmap_width;col++) {
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if(bmp[(bitmap_height-1 -row) * PaddedWidth + col]) {
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(*bitmap)[ (row/8) * bitmap_width + col ] &= ~ (1<<(row&7));
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if(depth == 8)
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{
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/* Now convert the bitmap into an array with 1 byte per pixel,
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exactly the size of the image */
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for(row = 0;row < bitmap_height;row++) {
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for(col = 0;col < bitmap_width;col++) {
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if(bmp[(bitmap_height-1 -row) * PaddedWidth + col]) {
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(*bitmap)[ (row/8) * bitmap_width + col ] &=
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~ (1<<(row&7));
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}
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else {
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(*bitmap)[ (row/8) * bitmap_width + col ] |=
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1<<(row&7);
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}
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}
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}
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else {
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(*bitmap)[ (row/8) * bitmap_width + col ] |= 1<<(row&7);
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}
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else
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{
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int bit;
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int byte;
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/* monocrome BMP conversion uses 8 pixels per byte */
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for(row = 0; row < bitmap_height; row++) {
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bit = 7;
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byte = 0;
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for(col = 0;col < bitmap_width;col++) {
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if((bmp[(bitmap_height - row - 1) * PaddedWidth + byte] &
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(1 << bit))) {
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(*bitmap)[(row/8) * bitmap_width + col ] &=
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~(1<<(row&7));
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}
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else {
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(*bitmap)[(row/8) * bitmap_width + col ] |=
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1<<(row&7);
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}
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if(bit) {
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bit--;
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}
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else {
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bit = 7;
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byte++;
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}
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}
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}
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}
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}
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free(bmp);
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