/* Test glGenProgramsARB(), glIsProgramARB(), glLoadProgramARB() */ #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(); glBegin(GL_POLYGON); glVertexAttrib2fARB(0, -1, -1); glVertexAttrib2fARB(0, 1, -1); glVertexAttrib2fARB(0, 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_VERTEX_PROGRAM_ARB, prognum); glProgramStringARB(GL_VERTEX_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 ) { GLuint prognum[4]; static const char *prog1 = "!!ARBvp1.0\n" "TEMP R0;\n" "MUL result.color.primary.xyz, R0, program.local[35]; \n" "END\n"; static const char *prog2 = "!!ARBvp1.0\n" "#\n" "# c[0-3] = modelview projection (composite) matrix\n" "# c[32] = normalized light direction in object-space\n" "# c[35] = yellow diffuse material, (1.0, 1.0, 0.0, 1.0)\n" "# c[64].x = 0.0\n" "# c[64].z = 0.125, a scaling factor\n" "TEMP R0, R1;\n" "#\n" "# outputs diffuse illumination for color and perturbed position\n" "#\n" "DP3 R0, program.local[32], vertex.normal; # light direction DOT normal\n" "MUL result.color.primary.xyz, R0, program.local[35]; \n" "MAX R0, program.local[64].x, R0; \n" "MUL R0, R0, vertex.normal; \n" "MUL R0, R0, program.local[64].z; \n" "ADD R1, vertex.position, -R0; # perturb object space position\n" "DP4 result.position.x, state.matrix.mvp.row[3], R1; \n" "DP4 result.position.y, state.matrix.mvp.row[1], R1; \n" "DP4 result.position.z, state.matrix.mvp.row[2], R1; \n" "DP4 result.position.w, state.matrix.mvp.row[3], R1; \n" "END\n"; static const char *prog3 = "!!ARBvp1.0\n" "TEMP R0, R1, R2, R3;\n" "DP4 result.position.x, state.matrix.mvp.row[0], vertex.position;\n" "DP4 result.position.y, state.matrix.mvp.row[1], vertex.position;\n" "DP4 result.position.z, state.matrix.mvp.row[2], vertex.position;\n" "DP4 result.position.w, state.matrix.mvp.row[3], vertex.position;\n" "DP3 R0.x, state.matrix.modelview.inverse.row[0], vertex.normal;\n" "DP3 R0.y, state.matrix.modelview.inverse.row[1], vertex.normal;\n" "DP3 R0.z, state.matrix.modelview.inverse.row[2], vertex.normal;\n" "DP3 R1.x, program.env[32], R0; # R1.x = Lpos DOT n'\n" "DP3 R1.y, program.env[33], R0; # R1.y = hHat DOT n'\n" "MOV R1.w, program.local[38].x; # R1.w = specular power\n" "LIT R2, R1; # Compute lighting values\n" "MAD R3, program.env[35].x, R2.y, program.env[35].y; # diffuse + emissive\n" "MAD result.color.primary.xyz, program.env[36], R2.z, R3; # + specular\n" "END\n"; static const char *prog4 = "!!ARBvp1.0\n" "TEMP R2, R3;\n" "PARAM foo = {0., 0., 0., 1.};\n" "PARAM blah[] = { program.local[0..8] };\n" "ADDRESS A0;\n" "ARL A0.x, foo.x;\n" "DP4 R2, R3, blah[A0.x].x;\n" "DP4 R2, R3, blah[A0.x + 5];\n" "DP4 result.position, R3, blah[A0.x - 4];\n" "END\n"; glGenProgramsARB(4, prognum); load_program(prog1, prognum[0]); load_program(prog2, prognum[1]); load_program(prog3, prognum[2]); load_program(prog4, prognum[3]); } 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; }