#include <math.h>
#include <GL/glut.h>
+GLboolean wrapping;
static void RunTest(void)
{
- const GLenum prim = GL_LINES;
+ const GLenum prim = GL_QUAD_STRIP;
GLubyte val;
int bits, max, i;
+ int expected;
+ GLboolean failed;
glGetIntegerv(GL_STENCIL_BITS, &bits);
max = (1 << bits) - 1;
- glClearStencil(0);
+
glEnable(GL_STENCIL_TEST);
glStencilFunc(GL_ALWAYS, 0, ~0);
+ /* test GL_KEEP */
+ glClearStencil(max);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+ failed = GL_FALSE;
+ printf("Testing GL_KEEP...\n");
+ expected = max;
+ glBegin(prim);
+ glVertex2f(0, 0);
+ glVertex2f(10, 0);
+ glVertex2f(0, 10);
+ glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf("Failed GL_KEEP test(got %u, expected %u)\n", val, expected);
+ failed = GL_TRUE;
+ }
+ else
+ printf("OK!\n");
+
+ /* test GL_ZERO */
+ glClearStencil(max);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_ZERO);
+ failed = GL_FALSE;
+ printf("Testing GL_ZERO...\n");
+ expected = 0;
+ glBegin(prim);
+ glVertex2f(0, 0);
+ glVertex2f(10, 0);
+ glVertex2f(0, 10);
+ glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf("Failed GL_ZERO test(got %u, expected %u)\n", val, expected);
+ failed = GL_TRUE;
+ }
+ else
+ printf("OK!\n");
+
+ /* test GL_REPLACE */
+ glClearStencil(max);
+ glClear(GL_STENCIL_BUFFER_BIT);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
+ failed = GL_FALSE;
+ printf("Testing GL_REPLACE...\n");
+ expected = 0;
+ glBegin(prim);
+ glVertex2f(0, 0);
+ glVertex2f(10, 0);
+ glVertex2f(0, 10);
+ glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf("Failed GL_REPLACE test(got %u, expected %u)\n", val, expected);
+ failed = GL_TRUE;
+ }
+ else
+ printf("OK!\n");
+
/* test GL_INCR (saturation) */
+ glClearStencil(0);
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;
+ expected = (i > max) ? max : i;
glBegin(prim);
- glVertex2f(0.5, 0.5); glVertex2f(9.5, 0.5);
+ glVertex2f(0, 0); glVertex2f(10, 0);
+ glVertex2f(0, 10); glVertex2f(10, 10);
glEnd();
- glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
- assert(val == expected);
- }
- printf("OK!\n");
- /* test GL_INCR_WRAP_EXT (wrap around) */
- glClear(GL_STENCIL_BUFFER_BIT);
- glStencilOp(GL_KEEP, GL_KEEP, GL_INCR_WRAP_EXT);
- printf("Testing GL_INCR_WRAP_EXT...\n");
- for (i = 1; i < max+10; i++) {
- int expected = i % (max + 1);
- 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_DECR (saturation) */
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;
+ expected = (i < 0) ? 0 : i;
glBegin(prim);
- glVertex2f(0.5, 0.5); glVertex2f(9.5, 0.5);
+ glVertex2f(0, 0); glVertex2f(10, 0);
+ glVertex2f(0, 10); glVertex2f(10, 10);
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) */
+ /* test GL_INVERT */
+ glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT);
- glStencilOp(GL_KEEP, GL_KEEP, GL_DECR_WRAP_EXT);
- printf("Testing GL_DECR_WRAP_EXT...\n");
- for (i = max-1; i > -10; i--) {
- int expected = (i < 0) ? max + i + 1: 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);
+ glStencilOp(GL_KEEP, GL_KEEP, GL_INVERT);
+ failed = GL_FALSE;
+ printf("Testing GL_INVERT...\n");
+ expected = max;
+ glBegin(prim);
+ glVertex2f(0, 0);
+ glVertex2f(10, 0);
+ glVertex2f(0, 10);
+ glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf("Failed GL_INVERT test(got %u, expected %u)\n", val, expected);
+ failed = GL_TRUE;
+ }
+ else
+ printf("OK!\n");
+
+ if(wrapping)
+ {
+ /* test GL_INCR_WRAP_EXT (wrap around) */
+ glClearStencil(0);
+ 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++) {
+ expected = i % (max + 1);
+ glBegin(prim);
+ glVertex2f(0, 0); glVertex2f(10, 0);
+ glVertex2f(0, 10); glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf( "Failed GL_INCR_WRAP test on iteration #%u "
+ "(got %u, expected %u)\n", i, val, expected );
+ failed = GL_TRUE;
+ }
+ }
+ if ( !failed )
+ printf("OK!\n");
+
+ /* test GL_DECR_WRAP_EXT (wrap-around) */
+ glClearStencil(max);
+ 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--) {
+ expected = (i < 0) ? max + i + 1: i;
+ glBegin(prim);
+ glVertex2f(0, 0); glVertex2f(10, 0);
+ glVertex2f(0, 10); glVertex2f(10, 10);
+ glEnd();
+ glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
+ if (val != expected) {
+ printf( "Failed GL_DECR_WRAP test on iteration #%u "
+ "(got %u, expected %u)\n", max - i, val, expected );
+ failed = GL_TRUE;
+ }
+ }
+ if ( !failed )
+ printf("OK!\n");
}
- printf("OK!\n");
glDisable(GL_STENCIL_TEST);
}
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")) {
- printf("Sorry, GL_EXT_stencil_wrap not supported.\n");
- exit(1);
- }
+
+
+ /* Check for both the extension string and GL version 1.4 on the
+ * outside chance that some 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 : atof( ver_str );
+
+ wrapping = (glutExtensionSupported("GL_EXT_stencil_wrap") || (version >= 1.4));
+ if (!wrapping)
+ printf("GL_EXT_stencil_wrap not supported. Only testing the rest.\n");
}
projects / mesa.git / blobdiff