applied Ian's misc patches
diff --git a/progs/tests/stencilwrap.c b/progs/tests/stencilwrap.c
index e65258b..da87541 100644
--- a/progs/tests/stencilwrap.c
+++ b/progs/tests/stencilwrap.c
@@ -16,6 +16,7 @@
const GLenum prim = GL_LINES;
GLubyte val;
int bits, max, i;
+ GLboolean failed;
glGetIntegerv(GL_STENCIL_BITS, &bits);
max = (1 << bits) - 1;
@@ -27,20 +28,29 @@
/* test GL_INCR (saturation) */
glClear(GL_STENCIL_BUFFER_BIT);
glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
+ failed = GL_FALSE;
printf("Testing GL_INCR...\n");
for (i = 1; i < max+10; i++) {
int expected = (i > max) ? max : i;
glBegin(prim);
glVertex2f(0.5, 0.5); glVertex2f(9.5, 0.5);
glEnd();
+
glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
- assert(val == expected);
+ if (val != expected) {
+ printf( "Failed GL_INCR test on iteration #%u "
+ "(got %u, expected %u)\n", i, val, expected );
+ failed = GL_TRUE;
+ }
}
- printf("OK!\n");
+
+ if ( !failed ) printf("OK!\n");
+
/* test GL_INCR_WRAP_EXT (wrap around) */
glClear(GL_STENCIL_BUFFER_BIT);
glStencilOp(GL_KEEP, GL_KEEP, GL_INCR_WRAP_EXT);
+ failed = GL_FALSE;
printf("Testing GL_INCR_WRAP_EXT...\n");
for (i = 1; i < max+10; i++) {
int expected = i % (max + 1);
@@ -48,15 +58,20 @@
glVertex2f(0.5, 0.5); glVertex2f(9.5, 0.5);
glEnd();
glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
- assert(val == expected);
+ if (val != expected) {
+ printf( "Failed GL_INCR_WRAP test on iteration #%u "
+ "(got %u, expected %u)\n", i, val, expected );
+ failed = GL_TRUE;
+ }
}
- printf("OK!\n");
+ if ( !failed ) printf("OK!\n");
glClearStencil(max);
/* test GL_INCR (saturation) */
glClear(GL_STENCIL_BUFFER_BIT);
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
+ failed = GL_FALSE;
printf("Testing GL_DECR...\n");
for (i = max-1; i > -10; i--) {
int expected = (i < 0) ? 0 : i;
@@ -64,13 +79,18 @@
glVertex2f(0.5, 0.5); glVertex2f(9.5, 0.5);
glEnd();
glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
- assert(val == expected);
+ if (val != expected) {
+ printf( "Failed GL_DECR test on iteration #%u "
+ "(got %u, expected %u)\n", max - i, val, expected );
+ failed = GL_TRUE;
+ }
}
- printf("OK!\n");
+ if ( !failed ) printf("OK!\n");
/* test GL_INCR_WRAP_EXT (wrap-around) */
glClear(GL_STENCIL_BUFFER_BIT);
glStencilOp(GL_KEEP, GL_KEEP, GL_DECR_WRAP_EXT);
+ failed = GL_FALSE;
printf("Testing GL_DECR_WRAP_EXT...\n");
for (i = max-1; i > -10; i--) {
int expected = (i < 0) ? max + i + 1: i;
@@ -78,9 +98,13 @@
glVertex2f(0.5, 0.5); glVertex2f(9.5, 0.5);
glEnd();
glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
- assert(val == expected);
+ if (val != expected) {
+ printf( "Failed GL_DECR_WRAP test on iteration #%u "
+ "(got %u, expected %u)\n", max - i, val, expected );
+ failed = GL_TRUE;
+ }
}
- printf("OK!\n");
+ if ( !failed ) printf("OK!\n");
glDisable(GL_STENCIL_TEST);
}
@@ -122,9 +146,24 @@
static void Init( void )
{
+ const char * ver_str;
+ float version;
+
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
- if (!glutExtensionSupported("GL_EXT_stencil_wrap")) {
+
+
+ /* Check for both the extension string and GL version 1.4 on the
+ * outside chance that some silly vendor exports version 1.4 but doesn't
+ * export the extension string. The stencil-wrap modes are a required
+ * part of GL 1.4.
+ */
+
+ ver_str = glGetString( GL_VERSION );
+ version = (ver_str == NULL) ? 1.0 : strtof( ver_str, NULL );
+
+ if ( !glutExtensionSupported("GL_EXT_stencil_wrap")
+ && (version < 1.4) ) {
printf("Sorry, GL_EXT_stencil_wrap not supported.\n");
exit(1);
}