+
+static void swap_byte_order(XImage *im)
+{
+ int x, y, di;
+
+ g_message("SWAPPING BYTE ORDER");
+
+ di = 0;
+ for (y = 0; y < im->height; ++y) {
+ for (x = 0; x < im->height; ++x) {
+ char *c = &im->data[di + x * im->bits_per_pixel / 8];
+ char t;
+
+ switch (im->bits_per_pixel) {
+ case 32:
+ t = c[2];
+ c[2] = c[3];
+ c[3] = t;
+ case 16:
+ t = c[0];
+ c[0] = c[1];
+ c[1] = t;
+ case 8:
+ break;
+ default:
+ g_message("your bit depth is currently unhandled\n");
+ }
+ }
+ di += im->bytes_per_line;
+ }
+
+ if (im->byte_order == LSBFirst)
+ im->byte_order = MSBFirst;
+ else
+ im->byte_order = LSBFirst;
+}
+
+void increase_depth(pixel32 *data, XImage *im)
+{
+ int r, g, b;
+ int x,y;
+ pixel32 *p32 = (pixel32 *) im->data;
+ pixel16 *p16 = (pixel16 *) im->data;
+ unsigned char *p8 = (unsigned char *)im->data;
+
+ if (im->byte_order != render_endian)
+ swap_byte_order(im);
+
+ switch (im->bits_per_pixel) {
+ case 32:
+ for (y = 0; y < im->height; y++) {
+ for (x = 0; x < im->width; x++) {
+ r = (p32[x] >> render_red_offset) & 0xff;
+ g = (p32[x] >> render_green_offset) & 0xff;
+ b = (p32[x] >> render_blue_offset) & 0xff;
+ data[x] = (r << default_red_offset)
+ + (g << default_green_offset)
+ + (b << default_blue_offset)
+ + (0xff << default_alpha_offset);
+ }
+ data += im->width;
+ p32 += im->bytes_per_line/4;
+ }
+ break;
+ case 16:
+ for (y = 0; y < im->height; y++) {
+ for (x = 0; x < im->width; x++) {
+ r = (p16[x] & render_red_mask) >> render_red_offset <<
+ render_red_shift;
+ g = (p16[x] & render_green_mask) >> render_green_offset <<
+ render_green_shift;
+ b = (p16[x] & render_blue_mask) >> render_blue_offset <<
+ render_blue_shift;
+ data[x] = (r << default_red_offset)
+ + (g << default_green_offset)
+ + (b << default_blue_offset)
+ + (0xff << default_alpha_offset);
+ }
+ data += im->width;
+ p16 += im->bytes_per_line/2;
+ }
+ break;
+ case 8:
+ g_message("this image bit depth is currently unhandled\n");
+ break;
+ case 1:
+ for (y = 0; y < im->height; y++) {
+ for (x = 0; x < im->width; x++) {
+ if (!(((p8[x / 8]) >> (x % 8)) & 0x1))
+ data[x] = 0xff << default_alpha_offset; /* black */
+ else
+ data[x] = 0xffffffff; /* white */
+ }
+ data += im->width;
+ p8 += im->bytes_per_line;
+ }
+ break;
+ default:
+ g_message("this image bit depth is currently unhandled\n");
+ }
+}