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progs/tests: also test stencil INCR_WRAP mode if supported

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This commit is contained in:
Brian Paul 2010-03-18 15:04:31 -06:00
parent 66b6676d14
commit c9c0baabdc
1 changed files with 47 additions and 6 deletions
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53
progs/tests/stencil_twoside.c
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@ -26,7 +26,7 @@
* \file stencil_twoside.c
*
* Simple test of GL_ATI_separate_stencil (or the OGL 2.0 equivalent) functionality.
* Four squares are drawn
* Five squares (or six if stencil wrap is available) are drawn
* with different stencil modes, but all should be rendered with the same
* final color.
*/
@ -37,7 +37,7 @@
#include <GL/glut.h>
static int use20syntax = 1;
static int Width = 550;
static int Width = 650;
static int Height = 200;
static const GLfloat Near = 5.0, Far = 25.0;
@ -70,7 +70,7 @@ static void Display( void )
*/
glDisable(GL_STENCIL_TEST);
glTranslatef(-6.0, 0, 0);
glTranslatef(-7.0, 0, 0);
glBegin(GL_QUADS);
glColor3f( 0.5, 0.5, 0.5 );
glVertex2f(-1, -1);
@ -205,8 +205,8 @@ static void Display( void )
else {
stencil_func_separate_ati(GL_ALWAYS, GL_ALWAYS, 0, ~0);
}
stencil_op_separate(GL_FRONT, GL_KEEP, GL_KEEP, GL_DECR);
stencil_op_separate(GL_BACK, GL_KEEP, GL_KEEP, GL_INCR);
stencil_op_separate(GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR);
stencil_op_separate(GL_BACK, GL_KEEP, GL_KEEP, GL_DECR);
glTranslatef(3.0, 0, 0);
glBegin(GL_QUADS);
@ -234,6 +234,47 @@ static void Display( void )
glVertex2f(-1, 1);
glEnd();
/*************************************************************************
* 6th square
*/
if (glutExtensionSupported("GL_EXT_stencil_wrap")) {
if (use20syntax) {
stencil_func_separate(GL_FRONT, GL_ALWAYS, 0, ~0);
stencil_func_separate(GL_BACK, GL_ALWAYS, 0, ~0);
}
else {
stencil_func_separate_ati(GL_ALWAYS, GL_ALWAYS, 0, ~0);
}
stencil_op_separate(GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP);
stencil_op_separate(GL_BACK, GL_KEEP, GL_KEEP, GL_INCR_WRAP);
glTranslatef(3.0, 0, 0);
glBegin(GL_QUADS);
glColor3f( 0.9, 0.9, 0.9 );
for ( i = 0 ; i < (max_stencil + 5) ; i++ ) {
/* this should be back facing */
glVertex2f(-1, -1);
glVertex2f(-1, 1);
glVertex2f( 1, 1);
glVertex2f( 1, -1);
/* this should be front facing */
glVertex2f(-1, -1);
glVertex2f( 1, -1);
glVertex2f( 1, 1);
glVertex2f(-1, 1);
}
glEnd();
glStencilFunc(GL_EQUAL, 260 - 255, ~0);
glBegin(GL_QUADS);
glColor3f( 0.5, 0.5, 0.5 );
glVertex2f(-1, -1);
glVertex2f( 1, -1);
glVertex2f( 1, 1);
glVertex2f(-1, 1);
glEnd();
}
glPopMatrix();
glutSwapBuffers();
@ -288,7 +329,7 @@ static void Init( void )
stencil_func_separate_ati = (PFNGLSTENCILFUNCSEPARATEATIPROC) glutGetProcAddress( "glStencilFuncSeparateATI" );
stencil_op_separate = (PFNGLSTENCILOPSEPARATEPROC) glutGetProcAddress( "glStencilOpSeparate" );
printf("\nAll 5 squares should be the same color.\n");
printf("\nAll 5 (or 6) squares should be the same color.\n");
}