-/* $Id: cva.c,v 1.1 2000/11/01 03:14:12 gareth Exp $ */
/*
* Trivial CVA test, good for testing driver fastpaths (especially
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#ifdef __VMS
+# include <stddef.h> /* for ptrdiff_t, referenced by GL.h when GL_GLEXT_LEGACY defined */
+#else
+# include <malloc.h> /* for ptrdiff_t, referenced by GL.h when GL_GLEXT_LEGACY defined */
+#endif
+#ifdef _WIN32
+#include <windows.h>
+#endif
#define GL_GLEXT_LEGACY
#include <GL/glut.h>
GLfloat verts[][4] = {
- { 0.25, 0.25, 0.0, 0.0 },
- { 0.75, 0.25, 0.0, 0.0 },
- { 0.25, 0.75, 0.0, 0.0 },
+ { -0.5, -0.5, -2.0, 0.0 },
+ { 0.5, -0.5, -2.0, 0.0 },
+ { -0.5, 0.5, -2.0, 0.0 },
+ { 0.5, 0.5, -2.0, 0.0 },
};
GLubyte color[][4] = {
{ 0xff, 0x00, 0x00, 0x00 },
{ 0x00, 0xff, 0x00, 0x00 },
{ 0x00, 0x00, 0xff, 0x00 },
+ { 0xff, 0xff, 0xff, 0x00 },
};
-GLuint indices[] = { 0, 1, 2 };
+GLuint indices[] = { 0, 1, 2, 3 };
GLboolean compiled = GL_TRUE;
+GLboolean doubleBuffer = GL_TRUE;
void init( void )
glClearColor( 0.0, 0.0, 0.0, 0.0 );
glShadeModel( GL_SMOOTH );
+ glFrontFace( GL_CCW );
+ glCullFace( GL_BACK );
+ glEnable( GL_CULL_FACE );
+
glEnable( GL_DEPTH_TEST );
glEnableClientState( GL_VERTEX_ARRAY );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
- glOrtho( 0.0, 1.0, 0.0, 1.0, -1.0, 1.0 );
+ glFrustum( -1.0, 1.0, -1.0, 1.0, 2.0, 10.0 );
glMatrixMode( GL_MODELVIEW );
+ glLoadIdentity();
glVertexPointer( 3, GL_FLOAT, sizeof(verts[0]), verts );
glColorPointer( 4, GL_UNSIGNED_BYTE, 0, color );
#ifdef GL_EXT_compiled_vertex_array
if ( compiled ) {
- glLockArraysEXT( 0, 3 );
+ glLockArraysEXT( 0, 4 );
}
#endif
}
glDrawElements( GL_TRIANGLES, 3, GL_UNSIGNED_INT, indices );
glFlush();
+ if ( doubleBuffer ) {
+ glutSwapBuffers();
+ }
}
void keyboard( unsigned char key, int x, int y )
exit( 0 );
break;
}
+
+ glutPostRedisplay();
+}
+
+GLboolean args( int argc, char **argv )
+{
+ GLint i;
+
+ doubleBuffer = GL_TRUE;
+
+ for ( i = 1 ; i < argc ; i++ ) {
+ if ( strcmp( argv[i], "-sb" ) == 0 ) {
+ doubleBuffer = GL_FALSE;
+ } else if ( strcmp( argv[i], "-db" ) == 0 ) {
+ doubleBuffer = GL_TRUE;
+ } else {
+ fprintf( stderr, "%s (Bad option).\n", argv[i] );
+ return GL_FALSE;
+ }
+ }
+ return GL_TRUE;
}
int main( int argc, char **argv )
{
+ GLenum type;
char *string;
+ double version;
glutInit( &argc, argv );
- glutInitDisplayMode( GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH );
+
+ if ( args( argc, argv ) == GL_FALSE ) {
+ exit( 1 );
+ }
+
+ type = GLUT_RGB | GLUT_DEPTH;
+ type |= ( doubleBuffer ) ? GLUT_DOUBLE : GLUT_SINGLE;
+
+ glutInitDisplayMode( type );
glutInitWindowSize( 250, 250 );
glutInitWindowPosition( 100, 100 );
glutCreateWindow( "CVA Test" );
*/
string = (char *) glGetString( GL_VERSION );
- if ( !strstr( string, "1.2" ) ) {
+ version = atof(string);
+ if ( version < 1.2 ) {
fprintf( stderr, "This program requires OpenGL 1.2 vertex arrays.\n" );
exit( -1 );
}