added subtest that checks subimage and get functions

use -subtest and one part of the texture will be read and written
elsewhere.

diff --git a/main.c b/main.c
index a023307..497dc40 100644 (file)
--- a/main.c
+++ b/main.c
@@ -27,15 +27,32 @@ void print_compressed_formats(void);
 
 unsigned int tex, comp_tex;
 const char *texfile;
+int subtest;
 
 int main(int argc, char **argv)
 {
+       int i;
        unsigned int glut_flags = GLUT_RGB | GLUT_DOUBLE;
 #ifdef USE_SRGB
        glut_flags |= GLUT_SRGB;
 #endif
 
-       texfile = argv[1];
+       for(i=1; i<argc; i++) {
+               if(argv[i][0] == '-') {
+                       if(strcmp(argv[i], "-subtest") == 0) {
+                               subtest = 1;
+                       } else {
+                               fprintf(stderr, "invalid option: %s\n", argv[i]);
+                               return 1;
+                       }
+               } else {
+                       if(texfile) {
+                               fprintf(stderr, "unexpected argument: %s\n", argv[i]);
+                               return 1;
+                       }
+                       texfile = argv[1];
+               }
+       }
 
        glutInit(&argc, argv);
        glutInitWindowSize(800, 600);
@@ -120,6 +137,13 @@ int init(void)
        } else {
                printf("submitted and retrieved sizes match (%d bytes)\n", comp_size);
        }
+
+       if(subtest) {
+               memset(buf, 0, comp_size);
+               glGetCompressedTextureSubImage(tex, 0, 192, 64, 0, 64, 64, 1, comp_size, buf);
+               glCompressedTexSubImage2D(GL_TEXTURE_2D, 0, 32, 32, 64, 64, COMP_FMT, 2048, buf);
+       }
+
        free(buf);
        free(pixels);