added csprite stuff to the djgpp makefile

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

diff --git a/tools/csprite/src/main.c b/tools/csprite/src/main.c
index 4c291b9..0192002 100644 (file)
--- a/tools/csprite/src/main.c
+++ b/tools/csprite/src/main.c
@@ -20,9 +20,10 @@ int tile_xsz, tile_ysz;
 struct rect rect;
 int cmap_offs;
 int ckey;
-int fbpitch = 320;
+int fbpitch, fbwidth = 320;
 const char *name = "sprite";
 int asyntax = AS_GNU;
+int conv565;
 
 int main(int argc, char **argv)
 {
@@ -52,6 +53,13 @@ int main(int argc, char **argv)
                                        return 1;
                                }
 
+                       } else if(strcmp(argv[i], "-fbwidth") == 0) {
+                               fbwidth = atoi(argv[++i]);
+                               if(fbwidth <= 0) {
+                                       fprintf(stderr, "-fbwidth must be followed by a positive number\n");
+                                       return 1;
+                               }
+
                        } else if(strcmp(argv[i], "-fbpitch") == 0) {
                                fbpitch = atoi(argv[++i]);
                                if(fbpitch <= 0) {
@@ -68,11 +76,14 @@ int main(int argc, char **argv)
 
                        } else if(strcmp(argv[i], "-k") == 0 || strcmp(argv[i], "-key") == 0) {
                                ckey = strtol(argv[++i], &endp, 10);
-                               if(endp == argv[i] || ckey < 0 || ckey >= 256) {
+                               if(endp == argv[i] || ckey < 0) {
                                        fprintf(stderr, "%s must be followed by a valid color key\n", argv[i - 1]);
                                        return 1;
                                }
 
+                       } else if(strcmp(argv[i], "-conv565") == 0) {
+                               conv565 = 1;
+
                        } else if(strcmp(argv[i], "-gas") == 0) {
                                asyntax = AS_GNU;
 
@@ -99,10 +110,14 @@ int main(int argc, char **argv)
        return 0;
 }
 
+/* prototype of generated function is (void *fb, int x, int y, int idx) */
 const char *prefixfmt[] = {
        /* GNU assembler template */
+       "\t.text\n"
        "\t.global %s\n"
+       "\t.global _%s\n"
        "%s:\n"
+       "_%s:\n"
        "\tmov 12(%%esp), %%eax\n"
        "\tmov $%d, %%ecx\n"
        "\tmul %%ecx\n"
@@ -114,11 +129,22 @@ const char *prefixfmt[] = {
        "tiletab:\n",
 
        /* NASM template */
-       "\tglobl %s\n"
+       /* TODO hardcoding the 16bpp changes for now, generalize later
+        *      and while we're at it, let's get rid of the mul too ...
+        */
+       "\tsection .text\n"
+       "\tglobal %s\n"
+       "\tglobal _%s\n"
        "%s:\n"
+       "_%s:\n"
        "\tmov eax, [esp + 12]\n"
-       "\tmov ecx. %d\n"
-       "\tmul ecx\n"
+       ";\tmov ecx, %d\n"
+       ";\tmul ecx\n"
+       "\tmov ecx, eax\n"
+       "\tshl eax, 9\n"
+       "\tshl ecx, 7\n"
+       "\tadd eax, ecx\n"
+       "\tadd eax, [esp + 8]\n"
        "\tadd eax, [esp + 8]\n"
        "\tadd eax, [esp + 4]\n"
        "\tmov edx, eax\n"
@@ -136,6 +162,19 @@ int proc_sheet(const char *fname)
                fprintf(stderr, "failed to load image: %s\n", fname);
                return -1;
        }
+       if(conv565) {
+               struct image tmp;
+               if(conv_image_rgb565(&tmp, &img) == -1) {
+                       fprintf(stderr, "failed to convert image to 16bpp 565: %s\n", fname);
+                       free(img.pixels);
+                       return -1;
+               }
+               free(img.pixels);
+               img = tmp;
+       }
+
+       if(!fbpitch) fbpitch = fbwidth * img.bpp / 8;
+
        if(rect.w <= 0) {
                rect.w = img.width;
                rect.h = img.height;
@@ -152,7 +191,7 @@ int proc_sheet(const char *fname)
                ysz = tile_ysz;
        }
 
-       printf(prefixfmt[asyntax], name, name, fbpitch);
+       printf(prefixfmt[asyntax], name, name, name, name, fbpitch);
        for(i=0; i<num_ytiles*num_xtiles; i++) {
                if(asyntax == AS_GNU) {
                        printf("\t.long tile%d\n", i);
@@ -170,6 +209,7 @@ int proc_sheet(const char *fname)
                }
        }
 
+       free(img.pixels);
        return 0;
 }
 
@@ -187,8 +227,8 @@ struct csop {
 
 int csprite(struct image *img, int x, int y, int xsz, int ysz)
 {
-       int i, j, numops, mode, new_mode, start, skip_acc;
-       unsigned char *pptr = img->pixels + y * img->scansz + x;
+       int i, j, numops, mode, new_mode, start, skip_acc, lenbytes, pixsz = img->bpp / 8;
+       unsigned char *pptr = img->pixels + y * img->scansz + x * pixsz;
        struct csop *ops, *optr;
 
        ops = optr = alloca((xsz + 1) * ysz * sizeof *ops);
@@ -202,7 +242,7 @@ int csprite(struct image *img, int x, int y, int xsz, int ysz)
                }
 
                for(j=0; j<xsz; j++) {
-                       if(*pptr == ckey) {
+                       if(memcmp(pptr, &ckey, pixsz) == 0) {
                                new_mode = CSOP_SKIP;
                        } else {
                                new_mode = CSOP_COPY;
@@ -218,9 +258,9 @@ int csprite(struct image *img, int x, int y, int xsz, int ysz)
                                mode = new_mode;
                                start = j;
                        }
-                       pptr++;
+                       pptr += pixsz;
                }
-               pptr += img->scansz - xsz;
+               pptr += img->scansz - xsz * pixsz;
 
                if(mode != -1) {
                        assert(start >= 0);
@@ -231,7 +271,7 @@ int csprite(struct image *img, int x, int y, int xsz, int ysz)
        }
        numops = optr - ops;
 
-       pptr = img->pixels + y * img->scansz + x;
+       pptr = img->pixels + y * img->scansz + x * img->bpp / 8;
        optr = ops;
        skip_acc = 0;
        /* edx points to dest */
@@ -239,25 +279,26 @@ int csprite(struct image *img, int x, int y, int xsz, int ysz)
                switch(optr->op) {
                case CSOP_SKIP:
                        skip_acc += optr->len;
-                       pptr += optr->len;
+                       pptr += optr->len * pixsz;
                        break;
 
                case CSOP_ENDL:
-                       skip_acc += fbpitch - xsz;
-                       pptr += img->scansz - xsz;
+                       skip_acc += fbwidth - xsz;
+                       pptr += img->scansz - xsz * pixsz;
                        break;
 
                case CSOP_COPY:
                        if(skip_acc) {
                                if(asyntax == AS_GNU) {
-                                       printf("\tadd $%d, %%edx\n", skip_acc);
+                                       printf("\tadd $%d, %%edx\n", skip_acc * pixsz);
                                } else {
-                                       printf("\tadd edx, %d\n", skip_acc);
+                                       printf("\tadd edx, %d\n", skip_acc * pixsz);
                                }
                                skip_acc = 0;
                        }
 
-                       for(j=0; j<optr->len / 4; j++) {
+                       lenbytes = optr->len * pixsz;
+                       for(j=0; j<lenbytes / 4; j++) {
                                if(asyntax == AS_GNU) {
                                        printf("\tmovl $0x%x, %d(%%edx)\n", *(uint32_t*)pptr, j * 4);
                                } else {
@@ -266,7 +307,7 @@ int csprite(struct image *img, int x, int y, int xsz, int ysz)
                                pptr += 4;
                        }
                        j *= 4;
-                       switch(optr->len % 4) {
+                       switch(lenbytes % 4) {
                        case 3:
                                if(asyntax == AS_GNU) {
                                        printf("\tmovb $0x%x, %d(%%edx)\n", (unsigned int)*pptr++, j++);
@@ -313,6 +354,7 @@ void print_usage(const char *argv0)
        printf(" -coffset <offs>: colormap offset [0, 255] (default: 0)\n");
        printf(" -fbpitch <pitch>: target framebuffer pitch (scanline size in bytes)\n");
        printf(" -k,-key <color>: color-key for transparency (default: 0)\n");
+       printf(" -conv565: convert image to 16bpp 565 before processing\n");
        printf(" -gas: output GNU assembler code (default)\n");
        printf(" -nasm: output NASM-compatible code\n");
        printf(" -h: print usage and exit\n");