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/* Test rebasing */
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "glad/gl.h"
#include "glut_wrap.h"
#define NR_VERTS 20000
GLfloat verts[NR_VERTS][4];
GLushort indices[NR_VERTS*2];
static void Init( void )
{
GLint errnum;
GLuint prognum;
GLint i;
static const char *prog1 =
"!!ARBvp1.0\n"
"MOV result.color, {1.0}.xxxx;\n"
"MOV result.position, vertex.position;\n"
"END\n";
glGenProgramsARB(1, &prognum);
glBindProgramARB(GL_VERTEX_PROGRAM_ARB, prognum);
glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
strlen(prog1), (const GLubyte *) prog1);
assert(glIsProgramARB(prognum));
errnum = glGetError();
printf("glGetError = %d\n", errnum);
if (errnum != GL_NO_ERROR)
{
GLint errorpos;
glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
printf("errorpos: %d\n", errorpos);
printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB));
}
glEnableClientState( GL_VERTEX_ARRAY );
glEnableClientState( GL_COLOR_ARRAY );
glVertexPointer( 3, GL_FLOAT, sizeof(verts[0]), verts );
for (i = 0; i < NR_VERTS; i++) {
verts[i][0] = cos(i / (float)NR_VERTS * 2.0 * 3.141592);
verts[i][1] = sin(i / (float)NR_VERTS * 2.0 * 3.141592);
verts[i][2] = 0.0;
verts[i][3] = 1.0;
indices[2*i+0] = i;
indices[2*i+1] = (i+1 == NR_VERTS) ? 0 : i+1;
}
}
static void Display( void )
{
glClearColor(0.3, 0.3, 0.3, 1);
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glEnable(GL_VERTEX_PROGRAM_NV);
/* Should have min_index == 1, maybe force a rebase:
*/
glDrawElements( GL_LINES, NR_VERTS*2, GL_UNSIGNED_SHORT, indices );
glFlush();
}
static void Reshape( int width, int height )
{
glViewport( 0, 0, width, height );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
/*glTranslatef( 0.0, 0.0, -15.0 );*/
}
static void Key( unsigned char key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case 27:
exit(0);
break;
}
glutPostRedisplay();
}
int main( int argc, char *argv[] )
{
glutInit( &argc, argv );
glutInitWindowPosition( 0, 0 );
glutInitWindowSize( 250, 250 );
glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE | GLUT_DEPTH );
glutCreateWindow(argv[0]);
gladLoaderLoadGL();
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutDisplayFunc( Display );
Init();
glutMainLoop();
gladLoaderUnloadGL();
return 0;
}
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