psp gfx scaling/etc stuff

[picodrive.git] / tools / mkbgxx.c

diff --git a/tools/mkbgxx.c b/tools/mkbgxx.c
new file mode 100644 (file)
index 0000000..02b51da
--- /dev/null
+++ b/tools/mkbgxx.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <zlib.h>
+
+static unsigned char buff[0x10140];
+static unsigned char buff2[0x10140];
+
+static void do_file(const char *ifn, const char *ofn)
+{
+       FILE *fi, *fo;
+       int ret;
+       unsigned long dlen = sizeof(buff2);
+
+       fi = fopen(ifn, "rb");
+       if (!fi) return;
+       fseek(fi, 0x10020, SEEK_SET);
+       fread(buff, 1, 0x10000, fi);
+       fseek(fi, 0x2000, SEEK_CUR);
+       fread(buff + 0x10000, 1, 0x80*2, fi);
+       fseek(fi, 0x221a0, SEEK_SET);
+       fread(buff + 0x10100, 1, 0x40, fi);
+       fclose(fi);
+
+       ret = compress2(buff2, &dlen, buff, sizeof(buff), Z_BEST_COMPRESSION);
+       if (ret) { printf("compress2 failed with %i\n", ret); return; }
+
+       fo = fopen(ofn, "wb");
+       if (!fo) return;
+       fwrite(buff2, 1, dlen, fo);
+       fclose(fo);
+
+       printf("%s: %6i -> %6li\n", ofn, sizeof(buff), dlen);
+}
+
+int main(int argc, char *argv[])
+{
+       if (argc != 3) return 1;
+
+       do_file(argv[1], "bg40.bin");
+       do_file(argv[2], "bg32.bin");
+
+       return 0;
+}
+