test the standard stencil op modes too (Philipp Klaus Krause)
This commit is contained in:
Brian Paul
parent
7a362deb8c
commit
c2c2600728
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@ -10,28 +10,94 @@
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#include <math.h>
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#include <GL/glut.h>
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GLboolean wrapping;
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static void RunTest(void)
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{
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const GLenum prim = GL_QUAD_STRIP;
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GLubyte val;
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int bits, max, i;
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int expected;
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GLboolean failed;
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glGetIntegerv(GL_STENCIL_BITS, &bits);
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max = (1 << bits) - 1;
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glClearStencil(0);
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glEnable(GL_STENCIL_TEST);
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glStencilFunc(GL_ALWAYS, 0, ~0);
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/* test GL_KEEP */
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glClearStencil(max);
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glClear(GL_STENCIL_BUFFER_BIT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
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failed = GL_FALSE;
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printf("Testing GL_KEEP...\n");
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expected = max;
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glBegin(prim);
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glVertex2f(0, 0);
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glVertex2f(10, 0);
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glVertex2f(0, 10);
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glVertex2f(10, 10);
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glEnd();
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glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
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if (val != expected) {
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printf("Failed GL_KEEP test(got %u, expected %u)\n", val, expected);
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failed = GL_TRUE;
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}
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else
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printf("OK!\n");
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/* test GL_ZERO */
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glClearStencil(max);
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glClear(GL_STENCIL_BUFFER_BIT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_ZERO);
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failed = GL_FALSE;
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printf("Testing GL_ZERO...\n");
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expected = 0;
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glBegin(prim);
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glVertex2f(0, 0);
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glVertex2f(10, 0);
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glVertex2f(0, 10);
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glVertex2f(10, 10);
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glEnd();
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glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
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if (val != expected) {
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printf("Failed GL_ZERO test(got %u, expected %u)\n", val, expected);
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failed = GL_TRUE;
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}
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else
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printf("OK!\n");
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/* test GL_REPLACE */
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glClearStencil(max);
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glClear(GL_STENCIL_BUFFER_BIT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
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failed = GL_FALSE;
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printf("Testing GL_REPLACE...\n");
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expected = 0;
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glBegin(prim);
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glVertex2f(0, 0);
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glVertex2f(10, 0);
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glVertex2f(0, 10);
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glVertex2f(10, 10);
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glEnd();
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glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
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if (val != expected) {
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printf("Failed GL_REPLACE test(got %u, expected %u)\n", val, expected);
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failed = GL_TRUE;
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}
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else
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printf("OK!\n");
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/* test GL_INCR (saturation) */
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glClearStencil(0);
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glClear(GL_STENCIL_BUFFER_BIT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
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failed = GL_FALSE;
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printf("Testing GL_INCR...\n");
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for (i = 1; i < max+10; i++) {
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int expected = (i > max) ? max : i;
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expected = (i > max) ? max : i;
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glBegin(prim);
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glVertex2f(0, 0); glVertex2f(10, 0);
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glVertex2f(0, 10); glVertex2f(10, 10);
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@ -44,39 +110,17 @@ static void RunTest(void)
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failed = GL_TRUE;
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}
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}
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if ( !failed )
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printf("OK!\n");
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if ( !failed ) printf("OK!\n");
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/* test GL_INCR_WRAP_EXT (wrap around) */
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glClear(GL_STENCIL_BUFFER_BIT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_INCR_WRAP_EXT);
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failed = GL_FALSE;
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printf("Testing GL_INCR_WRAP_EXT...\n");
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for (i = 1; i < max+10; i++) {
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int expected = i % (max + 1);
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glBegin(prim);
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glVertex2f(0, 0); glVertex2f(10, 0);
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glVertex2f(0, 10); glVertex2f(10, 10);
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glEnd();
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glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
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if (val != expected) {
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printf( "Failed GL_INCR_WRAP test on iteration #%u "
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"(got %u, expected %u)\n", i, val, expected );
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failed = GL_TRUE;
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}
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}
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if ( !failed ) printf("OK!\n");
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/* test GL_DECR (saturation) */
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glClearStencil(max);
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/* test GL_INCR (saturation) */
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glClear(GL_STENCIL_BUFFER_BIT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_DECR);
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failed = GL_FALSE;
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printf("Testing GL_DECR...\n");
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for (i = max-1; i > -10; i--) {
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int expected = (i < 0) ? 0 : i;
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expected = (i < 0) ? 0 : i;
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glBegin(prim);
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glVertex2f(0, 0); glVertex2f(10, 0);
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glVertex2f(0, 10); glVertex2f(10, 10);
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@ -88,27 +132,76 @@ static void RunTest(void)
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failed = GL_TRUE;
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}
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}
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if ( !failed ) printf("OK!\n");
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if ( !failed )
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printf("OK!\n");
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/* test GL_INCR_WRAP_EXT (wrap-around) */
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/* test GL_INVERT */
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glClearStencil(0);
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glClear(GL_STENCIL_BUFFER_BIT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_DECR_WRAP_EXT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_INVERT);
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failed = GL_FALSE;
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printf("Testing GL_DECR_WRAP_EXT...\n");
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for (i = max-1; i > -10; i--) {
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int expected = (i < 0) ? max + i + 1: i;
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glBegin(prim);
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glVertex2f(0, 0); glVertex2f(10, 0);
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glVertex2f(0, 10); glVertex2f(10, 10);
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glEnd();
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glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
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if (val != expected) {
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printf( "Failed GL_DECR_WRAP test on iteration #%u "
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"(got %u, expected %u)\n", max - i, val, expected );
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failed = GL_TRUE;
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}
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printf("Testing GL_INVERT...\n");
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expected = max;
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glBegin(prim);
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glVertex2f(0, 0);
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glVertex2f(10, 0);
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glVertex2f(0, 10);
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glVertex2f(10, 10);
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glEnd();
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glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
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if (val != expected) {
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printf("Failed GL_INVERT test(got %u, expected %u)\n", val, expected);
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failed = GL_TRUE;
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}
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else
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printf("OK!\n");
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if(wrapping)
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{
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/* test GL_INCR_WRAP_EXT (wrap around) */
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glClearStencil(0);
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glClear(GL_STENCIL_BUFFER_BIT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_INCR_WRAP_EXT);
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failed = GL_FALSE;
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printf("Testing GL_INCR_WRAP_EXT...\n");
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for (i = 1; i < max+10; i++) {
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expected = i % (max + 1);
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glBegin(prim);
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glVertex2f(0, 0); glVertex2f(10, 0);
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glVertex2f(0, 10); glVertex2f(10, 10);
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glEnd();
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glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
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if (val != expected) {
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printf( "Failed GL_INCR_WRAP test on iteration #%u "
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"(got %u, expected %u)\n", i, val, expected );
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failed = GL_TRUE;
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}
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}
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if ( !failed )
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printf("OK!\n");
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/* test GL_DECR_WRAP_EXT (wrap-around) */
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glClearStencil(max);
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glClear(GL_STENCIL_BUFFER_BIT);
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glStencilOp(GL_KEEP, GL_KEEP, GL_DECR_WRAP_EXT);
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failed = GL_FALSE;
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printf("Testing GL_DECR_WRAP_EXT...\n");
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for (i = max-1; i > -10; i--) {
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expected = (i < 0) ? max + i + 1: i;
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glBegin(prim);
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glVertex2f(0, 0); glVertex2f(10, 0);
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glVertex2f(0, 10); glVertex2f(10, 10);
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glEnd();
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glReadPixels(0, 0, 1, 1, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, &val);
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if (val != expected) {
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printf( "Failed GL_DECR_WRAP test on iteration #%u "
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"(got %u, expected %u)\n", max - i, val, expected );
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failed = GL_TRUE;
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}
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}
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if ( !failed )
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printf("OK!\n");
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}
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if ( !failed ) printf("OK!\n");
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glDisable(GL_STENCIL_TEST);
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}
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@ -158,7 +251,7 @@ static void Init( void )
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/* Check for both the extension string and GL version 1.4 on the
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* outside chance that some silly vendor exports version 1.4 but doesn't
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* outside chance that some vendor exports version 1.4 but doesn't
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* export the extension string. The stencil-wrap modes are a required
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* part of GL 1.4.
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*/
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@ -166,11 +259,9 @@ static void Init( void )
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ver_str = glGetString( GL_VERSION );
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version = (ver_str == NULL) ? 1.0 : atof( ver_str );
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if ( !glutExtensionSupported("GL_EXT_stencil_wrap")
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&& (version < 1.4) ) {
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printf("Sorry, GL_EXT_stencil_wrap not supported.\n");
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exit(1);
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}
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wrapping = (glutExtensionSupported("GL_EXT_stencil_wrap") || (version >= 1.4));
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if (!wrapping)
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printf("GL_EXT_stencil_wrap not supported. Only testing the rest.\n");
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}
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