| /* Test GL_ARB_fragment_program */ |
| |
| #include <assert.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <math.h> |
| #include <GL/glew.h> |
| #include <GL/glut.h> |
| |
| |
| |
| static void Display( void ) |
| { |
| glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); |
| |
| glPushMatrix(); |
| |
| glColor4f(0, 0.5, 0, 1); |
| glColor4f(0, 1, 0, 1); |
| glBegin(GL_POLYGON); |
| glVertex2f(-1, -1); |
| glVertex2f( 1, -1); |
| glVertex2f( 0, 1); |
| glEnd(); |
| |
| glPopMatrix(); |
| |
| glutSwapBuffers(); |
| } |
| |
| |
| static void Reshape( int width, int height ) |
| { |
| glViewport( 0, 0, width, height ); |
| glMatrixMode( GL_PROJECTION ); |
| glLoadIdentity(); |
| glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 ); |
| 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(); |
| } |
| |
| static void load_program(const char *prog, GLuint prognum) |
| { |
| int a; |
| GLint errorpos, errno; |
| |
| glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, prognum); |
| glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, |
| strlen(prog), (const GLubyte *) prog); |
| |
| assert(glIsProgramARB(prognum)); |
| errno = glGetError(); |
| printf("glGetError = %d\n", errno); |
| if (errno != GL_NO_ERROR) |
| { |
| glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos); |
| printf("errorpos: %d\n", errorpos); |
| printf("%s\n", (char *)glGetString(GL_PROGRAM_ERROR_STRING_ARB)); |
| |
| for (a=-10; a<10; a++) |
| { |
| if ((errorpos+a < 0) || (errorpos+a >= strlen(prog))) continue; |
| printf("%c", prog[errorpos+a]); |
| } |
| printf("\n"); |
| exit(1); |
| } |
| } |
| |
| static void Init( void ) |
| { |
| static const char *prog0 = |
| "!!ARBfp1.0\n" |
| "TEMP R0, RC, HC, H0, H1, H2, H3, H30 ;\n" |
| "MUL result.color, R0, fragment.position; \n" |
| "ADD result.color, H3, fragment.texcoord; \n" |
| "ADD_SAT result.color, H3, fragment.texcoord; \n" |
| "MUL result.color.xy, R0.wzyx, fragment.position; \n" |
| "MUL result.color, H0, fragment.position; \n" |
| "MUL result.color, -H0, fragment.position; \n" |
| "MOV RC, H1; \n" |
| "MOV HC, H2; \n" |
| "END \n" |
| ; |
| /* masked updates, defines, declarations */ |
| static const char *prog1 = |
| "!!ARBfp1.0\n" |
| "PARAM foo = {1., 2., 3., 4.}; \n" |
| "PARAM foo2 = 5.; \n" |
| "PARAM foo3 = {5., 6., 7., 8.}; \n" |
| "PARAM bar = 3.; \n" |
| "TEMP R0, R1, RC, EQ, NE, bar2; \n" |
| "ALIAS bar3 = bar; \n" |
| "MOV result.color.xy, R0; \n" |
| "MOV result.color, R0; \n" |
| "MOV result.color.xyzw, R0; \n" |
| "MOV result.color.xy, R0; \n" |
| "MOV RC.x, R1.x; \n" |
| "KIL NE; \n" |
| "KIL EQ.xyxy; \n" |
| "END \n" |
| ; |
| |
| /* texture instructions */ |
| static const char *prog2 = |
| "!!ARBfp1.0\n" |
| "TEMP R0, R1, R2, R3;\n" |
| "TEX R0, fragment.texcoord, texture[0], 2D; \n" |
| "TEX R1, fragment.texcoord[1], texture[1], CUBE; \n" |
| "TEX R2, fragment.texcoord[2], texture[2], 3D; \n" |
| "TXP R3, fragment.texcoord[3], texture[3], RECT; \n" |
| "MUL result.color, R0, fragment.color; \n" |
| "END \n" |
| ; |
| |
| /* test negation, absolute value */ |
| static const char *prog3 = |
| "!!ARBfp1.0\n" |
| "TEMP R0, R1;\n" |
| "MOV R0, R1; \n" |
| "MOV R0, -R1; \n" |
| "MOV result.color, R0; \n" |
| "END \n" |
| ; |
| |
| /* literal constant sources */ |
| static const char *prog4 = |
| "!!ARBfp1.0\n" |
| "TEMP R0, R1;\n" |
| "PARAM Pi = 3.14159; \n" |
| "MOV R0, {1., -2., +3., 4.}; \n" |
| "MOV R0, 5.; \n" |
| "MOV R0, -5.; \n" |
| "MOV R0, 5.; \n" |
| "MOV R0, Pi; \n" |
| "MOV result.color, R0; \n" |
| "END \n" |
| ; |
| |
| /* change the fragment color in a simple way */ |
| static const char *prog10 = |
| "!!ARBfp1.0\n" |
| "PARAM blue = {0., 0., 1., 0.};\n" |
| "PARAM color = {1., 0., 0., 1.};\n" |
| "TEMP R0; \n" |
| "MOV R0, fragment.color; \n" |
| "#ADD result.color, R0, fragment.color; \n" |
| "#ADD result.color, blue, fragment.color; \n" |
| "#ADD result.color, {1., 0., 0., 0.}, fragment.color; \n" |
| "ADD result.color, color, fragment.color; \n" |
| "END \n" |
| ; |
| |
| GLuint progs[20]; |
| |
| glGenProgramsARB(20, progs); |
| assert(progs[0]); |
| assert(progs[1]); |
| assert(progs[0] != progs[1]); |
| |
| |
| printf("program 0:\n"); |
| load_program(prog0, progs[0]); |
| printf("program 1:\n"); |
| load_program(prog1, progs[1]); |
| printf("program 2:\n"); |
| load_program(prog2, progs[2]); |
| printf("program 3:\n"); |
| load_program(prog3, progs[3]); |
| printf("program 4:\n"); |
| load_program(prog4, progs[4]); |
| printf("program 10:\n"); |
| load_program(prog10, progs[5]); |
| |
| |
| glEnable(GL_FRAGMENT_PROGRAM_ARB); |
| glEnable(GL_ALPHA_TEST); |
| glAlphaFunc(GL_ALWAYS, 0.0); |
| } |
| |
| |
| int main( int argc, char *argv[] ) |
| { |
| glutInit( &argc, argv ); |
| glutInitWindowPosition( 0, 0 ); |
| glutInitWindowSize( 250, 250 ); |
| glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH ); |
| glutCreateWindow(argv[0]); |
| glewInit(); |
| glutReshapeFunc( Reshape ); |
| glutKeyboardFunc( Key ); |
| glutDisplayFunc( Display ); |
| Init(); |
| glutMainLoop(); |
| return 0; |
| } |