diff options
| -rw-r--r-- | progs/tests/stencil_twoside.c | 53 |
1 files changed, 47 insertions, 6 deletions
diff --git a/progs/tests/stencil_twoside.c b/progs/tests/stencil_twoside.c index f9c109146d0..1010139a20e 100644 --- a/progs/tests/stencil_twoside.c +++ b/progs/tests/stencil_twoside.c @@ -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"); } |