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/* Test glGenProgramsNV(), glIsProgramNV(), glLoadProgramNV() */
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <GL/glew.h>
#include <GL/glut.h>
GLenum doubleBuffer;
static void Init(void)
{
GLint errno;
GLuint prognum;
static const char *prog1 =
"!!ARBvp1.0\n"
"PARAM Emission = state.material.emission; \n"
"PARAM Ambient = state.material.ambient; \n"
"PARAM Diffuse = state.material.diffuse; \n"
"PARAM Specular = state.material.specular; \n"
"DP4 result.position.x, Ambient, vertex.position;\n"
"DP4 result.position.y, Diffuse, vertex.position;\n"
"DP4 result.position.z, Specular, vertex.position;\n"
"DP4 result.position.w, Emission, vertex.position;\n"
"MOV result.texcoord[0], vertex.texcoord[0];\n"
"END\n";
const float Ambient[4] = { 0.0, 1.0, 0.0, 0.0 };
const float Diffuse[4] = { 1.0, 0.0, 0.0, 0.0 };
const float Specular[4] = { 0.0, 0.0, 1.0, 0.0 };
const float Emission[4] = { 0.0, 0.0, 0.0, 1.0 };
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, Ambient);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, Diffuse);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, Specular);
glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, Emission);
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));
errno = glGetError();
printf("glGetError = %d\n", errno);
if (errno != 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));
}
glEnable(GL_VERTEX_PROGRAM_NV);
#define SIZE 32
{
GLubyte tex2d[SIZE][SIZE][3];
GLint s, t;
for (s = 0; s < SIZE; s++) {
for (t = 0; t < SIZE; t++) {
#if 0
tex2d[t][s][0] = (s < SIZE/2) ? 0 : 255;
tex2d[t][s][1] = (t < SIZE/2) ? 0 : 255;
tex2d[t][s][2] = 0;
#else
tex2d[t][s][0] = s*255/(SIZE-1);
tex2d[t][s][1] = t*255/(SIZE-1);
tex2d[t][s][2] = 0;
#endif
}
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, 3, SIZE, SIZE, 0,
GL_RGB, GL_UNSIGNED_BYTE, tex2d);
glEnable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
}
}
static void Reshape(int width, int height)
{
glViewport(0, 0, (GLint)width, (GLint)height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
/* glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
glMatrixMode(GL_MODELVIEW);
}
static void Key(unsigned char key, int x, int y)
{
switch (key) {
case 27:
exit(1);
default:
break;
}
glutPostRedisplay();
}
static void Draw(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_TRIANGLES);
glTexCoord2f(1,-1);
glVertex3f( 0.9, -0.9, -0.0);
glTexCoord2f(1,1);
glVertex3f( 0.9, 0.9, -0.0);
glTexCoord2f(-1,0);
glVertex3f(-0.9, 0.0, -0.0);
glEnd();
glFlush();
if (doubleBuffer) {
glutSwapBuffers();
}
}
static GLenum Args(int argc, char **argv)
{
GLint i;
doubleBuffer = GL_FALSE;
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;
glutInit(&argc, argv);
if (Args(argc, argv) == GL_FALSE) {
exit(1);
}
glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
type = GLUT_RGB | GLUT_ALPHA;
type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
glutInitDisplayMode(type);
if (glutCreateWindow(*argv) == GL_FALSE) {
exit(1);
}
glewInit();
Init();
glutReshapeFunc(Reshape);
glutKeyboardFunc(Key);
glutDisplayFunc(Draw);
glutMainLoop();
return 0;
}
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