diff options
Diffstat (limited to 'progs')
| -rw-r--r-- | progs/tests/texwrap.c | 118 |
1 files changed, 91 insertions, 27 deletions
diff --git a/progs/tests/texwrap.c b/progs/tests/texwrap.c index 181f158304..fc6a8cbc1b 100644 --- a/progs/tests/texwrap.c +++ b/progs/tests/texwrap.c @@ -1,4 +1,4 @@ -/* $Id: texwrap.c,v 1.2 2001/04/12 20:50:26 brianp Exp $ */ +/* $Id: texwrap.c,v 1.3 2002/10/17 17:39:37 brianp Exp $ */ /* * Test texture wrap modes. @@ -16,10 +16,18 @@ #include <GL/glut.h> -#ifndef GL_CLAMP_TO_BORDER_ARB -#define GL_CLAMP_TO_BORDER_ARB 0x812D +#ifndef GL_CLAMP_TO_BORDER +#define GL_CLAMP_TO_BORDER 0x812D #endif +#ifndef GL_MIRRORED_REPEAT +#define GL_MIRRORED_REPEAT 0x8370 +#endif + +#ifndef GL_ATI_texture_mirror_once +#define GL_MIRROR_CLAMP_ATI 0x8742 +#define GL_MIRROR_CLAMP_TO_EDGE_ATI 0x8743 +#endif #define BORDER_TEXTURE 1 #define NO_BORDER_TEXTURE 2 @@ -30,6 +38,38 @@ static GLubyte NoBorderImage[SIZE][SIZE][4]; static GLuint Border = 1; +#define WRAP_MODE(m) { m , # m, GL_TRUE, 1.0, { NULL, NULL } } +#define WRAP_EXT(m,e1,e2,v) { m , # m, GL_FALSE, v, { e1, e2 } } + +struct wrap_mode { + GLenum mode; + const char * name; + GLboolean supported; + GLfloat version; + const char * extension_names[2]; +}; + +static struct wrap_mode modes[] = { + WRAP_MODE( GL_REPEAT ), + WRAP_MODE( GL_CLAMP ), + WRAP_EXT ( GL_CLAMP_TO_EDGE, "GL_EXT_texture_edge_clamp", + "GL_SGIS_texture_edge_clamp", + 1.2 ), + WRAP_EXT ( GL_CLAMP_TO_BORDER, "GL_ARB_texture_border_clamp", + "GL_SGIS_texture_border_clamp", + 1.3 ), + WRAP_EXT ( GL_MIRRORED_REPEAT, "GL_ARB_texture_mirrored_repeat", + "GL_IBM_texture_mirrored_repeat", + 1.4 ), + WRAP_EXT ( GL_MIRROR_CLAMP_ATI, "GL_ATI_texture_mirror_once", + NULL, + 999.0 ), + WRAP_EXT ( GL_MIRROR_CLAMP_TO_EDGE_ATI, "GL_ATI_texture_mirror_once", + NULL, + 999.0 ), + { 0 } +}; + static void PrintString(const char *s) { @@ -42,23 +82,36 @@ PrintString(const char *s) static void Display( void ) { - static const GLenum modes[] = { - GL_REPEAT, - GL_CLAMP, - GL_CLAMP_TO_EDGE, - GL_CLAMP_TO_BORDER_ARB - }; - static const char *names[] = { - "GL_REPEAT", - "GL_CLAMP", - "GL_CLAMP_TO_EDGE", - "GL_CLAMP_TO_BORDER_ARB" - }; - GLint i, j; - GLint numModes; + GLint offset; + GLfloat version; + + /* Fill in the extensions that are supported. + */ + + version = atof( (char *) glGetString( GL_VERSION ) ); + for ( i = 0 ; modes[i].mode != 0 ; i++ ) { + if ( ((modes[i].extension_names[0] != NULL) + && glutExtensionSupported(modes[i].extension_names[0])) + || ((modes[i].extension_names[1] != NULL) + && glutExtensionSupported(modes[i].extension_names[1])) ) { + modes[i].supported = GL_TRUE; + } + else if ( !modes[i].supported && (modes[i].version <= version) ) { + fprintf( stderr, "WARNING: OpenGL library meets minimum version\n" + " requirement for %s, but the\n" + " extension string is not advertised.\n" + " (%s%s%s)\n", + modes[i].name, + modes[i].extension_names[0], + (modes[i].extension_names[1] != NULL) + ? " or " : "", + (modes[i].extension_names[1] != NULL) + ? modes[i].extension_names[1] : "" ); + modes[i].supported = GL_TRUE; + } + } - numModes = glutExtensionSupported("GL_ARB_texture_border_clamp") ? 4 : 3; glClearColor(0.5, 0.5, 0.5, 1.0); glClear( GL_COLOR_BUFFER_BIT ); @@ -72,8 +125,11 @@ static void Display( void ) glBindTexture(GL_TEXTURE_2D, Border ? BORDER_TEXTURE : NO_BORDER_TEXTURE); + /* loop over min/mag filters */ for (i = 0; i < 2; i++) { + offset = 0; + if (i) { glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); @@ -84,15 +140,20 @@ static void Display( void ) } /* loop over border modes */ - for (j = 0; j < numModes; j++) { + for (j = 0; j < modes[j].mode != 0; j++) { const GLfloat x0 = 0, y0 = 0, x1 = 140, y1 = 140; const GLfloat b = 0.2; const GLfloat s0 = -b, t0 = -b, s1 = 1.0+b, t1 = 1.0+b; - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, modes[j]); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, modes[j]); + + if ( modes[j].supported != GL_TRUE ) + continue; + + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, modes[j].mode); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, modes[j].mode); glPushMatrix(); - glTranslatef(j * 150 + 10, i * 150 + 25, 0); + glTranslatef(offset * 150 + 10, i * 150 + 40, 0); + offset++; glEnable(GL_TEXTURE_2D); glColor3f(1, 1, 1); @@ -119,9 +180,13 @@ static void Display( void ) glDisable(GL_TEXTURE_2D); glColor3f(1, 1, 1); - for (i = 0; i < numModes; i++) { - glWindowPos2iMESA( i * 150 + 10, 5); - PrintString(names[i]); + offset = 0; + for (i = 0; i < modes[i].mode != 0; i++) { + if ( modes[i].supported ) { + glWindowPos2iMESA( offset * 150 + 10, 5 + ((offset & 1) * 15) ); + PrintString(modes[i].name); + offset++; + } } glutSwapBuffers(); @@ -192,7 +257,6 @@ static void Init( void ) glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SIZE+2, SIZE+2, 1, GL_RGBA, GL_UNSIGNED_BYTE, (void *) BorderImage); - for (i = 0; i < SIZE; i++) { for (j = 0; j < SIZE; j++) { if ((i + j) & 1) { @@ -223,7 +287,7 @@ int main( int argc, char *argv[] ) { glutInit( &argc, argv ); glutInitWindowPosition( 0, 0 ); - glutInitWindowSize( 650, 340 ); + glutInitWindowSize( 800, 355 ); glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); glutCreateWindow(argv[0]); glutReshapeFunc( Reshape ); |