made sprite compiler able to handle 565 formats. the assembly output

[dosdemo] / tools / csprite / src / image.c

diff --git a/tools/csprite/src/image.c b/tools/csprite/src/image.c
index 18e8609..84bad81 100644 (file)
--- a/tools/csprite/src/image.c
+++ b/tools/csprite/src/image.c
@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdlib.h>

+#include <stdint.h>

 #include <string.h>
 #include <errno.h>
 #include <assert.h>
 #include <string.h>
 #include <errno.h>
 #include <assert.h>

@@ -186,6 +187,51 @@ int save_image(struct image *img, const char *fname)
        return 0;
 }
 
        return 0;
 }
 

+int conv_image_rgb565(struct image *img16, struct image *img)
+{
+       int i, j;
+       uint16_t *dptr;
+       unsigned char *sptr;
+
+       if(!img->cmap_ncolors && img->bpp < 24) {
+               fprintf(stderr, "unsupported conversion from %dbpp to 16bpp 565\n", img->bpp);
+               return -1;
+       }
+
+       img16->width = img->width;
+       img16->height = img->height;
+       img16->nchan = img->nchan;
+       img16->bpp = 16;
+       img16->scansz = img16->pitch = img->width * 2;
+       if(!(img16->pixels = malloc(img16->height * img16->scansz))) {
+               return -1;
+       }
+
+       sptr = img->pixels;
+       dptr = (uint16_t*)img16->pixels;
+
+       for(i=0; i<img->height; i++) {
+               for(j=0; j<img->width; j++) {
+                       unsigned int r, g, b;
+                       if(img->bpp <= 8 && img->cmap_ncolors) {
+                               int idx = *sptr++ % img->cmap_ncolors;
+                               r = img->cmap[idx].r >> 3;
+                               g = img->cmap[idx].g >> 2;
+                               b = img->cmap[idx].b >> 3;
+                       } else if(img->nchan == 1) {
+                               g = (*sptr++ >> 2) & 0x3f;
+                               r = b = g >> 1;
+                       } else {
+                               r = (*sptr++ >> 3) & 0x1f;
+                               g = (*sptr++ >> 2) & 0x3f;
+                               b = (*sptr++ >> 3) & 0x1f;
+                       }
+                       *dptr++ = (r << 11) | (g << 5) | b;
+               }
+       }
+       return 0;
+}
+

 
 int cmp_image(struct image *a, struct image *b)
 {
 
 int cmp_image(struct image *a, struct image *b)
 {