progs/trivial/tri-fp-const-imm.c

   1 /*
   2  * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and
   5  * its documentation for any purpose is hereby granted without fee, provided
   6  * that (i) the above copyright notices and this permission notice appear in
   7  * all copies of the software and related documentation, and (ii) the name of
   8  * Silicon Graphics may not be used in any advertising or
   9  * publicity relating to the software without the specific, prior written
  10  * permission of Silicon Graphics.
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
  13  * ANY KIND,
  14  * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
  15  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  16  *
  17  * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
  18  * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
  19  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  20  * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
  21  * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  22  * OF THIS SOFTWARE.
  23  */
  24
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <stdlib.h>
  28 #include <GL/glew.h>
  29 #include <GL/glut.h>
  30
  31
  32 #define CI_OFFSET_1 16
  33 #define CI_OFFSET_2 32
  34
  35
  36 GLenum doubleBuffer;
  37
  38 static void Init(void)
  39 {
  40    GLint errno;
  41    GLuint prognum;
  42    static const char *prog1 =
  43       "!!ARBfp1.0\n"
  44       "TEMP R1;\n"
  45       "MOV  R1, state.material.emission;\n"
  46       "MUL  R1, R1, {0.9}.x;\n"
  47       "MOV  result.color, R1;\n"
  48       "END\n";
  49
  50
  51    fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
  52    fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
  53    fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
  54    fflush(stderr);
  55
  56    /* Setup the fragment program */
  57    glGenProgramsARB(1, &prognum);
  58    glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, prognum);
  59    glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
  60                       strlen(prog1), (const GLubyte *)prog1);
  61
  62    errno = glGetError();
  63    printf("glGetError = 0x%x\n", errno);
  64    if (errno != GL_NO_ERROR) {
  65       GLint errorpos;
  66
  67       glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
  68       printf("errorpos: %d\n", errorpos);
  69       printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n",
  70              (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
  71    }
  72    glEnable(GL_FRAGMENT_PROGRAM_ARB);
  73
  74     glClearColor(0.0, 0.0, 1.0, 0.0);
  75 }
  76
  77 static void Reshape(int width, int height)
  78 {
  79
  80     glViewport(0, 0, (GLint)width, (GLint)height);
  81
  82     glMatrixMode(GL_PROJECTION);
  83     glLoadIdentity();
  84 /*     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
  85     glMatrixMode(GL_MODELVIEW);
  86 }
  87
  88 static void Key(unsigned char key, int x, int y)
  89 {
  90
  91     switch (key) {
  92       case 27:
  93         exit(1);
  94       default:
  95         break;
  96     }
  97
  98     glutPostRedisplay();
  99 }
 100
 101 static void Draw(void)
 102 {
 103    glClear(GL_COLOR_BUFFER_BIT);
 104
 105    glBegin(GL_TRIANGLES);
 106    glColor3f(0,0,.7);
 107    glTexCoord3f(0,0,.7);
 108    glVertex3f( 0.9, -0.9, -0.0);
 109    glColor3f(.8,0,0);
 110    glTexCoord3f(.8,0,0);
 111    glVertex3f( 0.9,  0.9, -0.0);
 112    glColor3f(0,.9,0);
 113    glTexCoord3f(0,.9,0);
 114    glVertex3f(-0.9,  0.0, -0.0);
 115    glEnd();
 116
 117    glFlush();
 118
 119    if (doubleBuffer) {
 120       glutSwapBuffers();
 121    }
 122 }
 123
 124 static GLenum Args(int argc, char **argv)
 125 {
 126     GLint i;
 127
 128     doubleBuffer = GL_FALSE;
 129
 130     for (i = 1; i < argc; i++) {
 131         if (strcmp(argv[i], "-sb") == 0) {
 132             doubleBuffer = GL_FALSE;
 133         } else if (strcmp(argv[i], "-db") == 0) {
 134             doubleBuffer = GL_TRUE;
 135         } else {
 136             fprintf(stderr, "%s (Bad option).\n", argv[i]);
 137             return GL_FALSE;
 138         }
 139     }
 140     return GL_TRUE;
 141 }
 142
 143 int main(int argc, char **argv)
 144 {
 145     GLenum type;
 146
 147     glutInit(&argc, argv);
 148
 149     if (Args(argc, argv) == GL_FALSE) {
 150         exit(1);
 151     }
 152
 153     glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
 154
 155     type = GLUT_RGB | GLUT_ALPHA;
 156     type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
 157     glutInitDisplayMode(type);
 158
 159     if (glutCreateWindow(*argv) == GL_FALSE) {
 160         exit(1);
 161     }
 162
 163     glewInit();
 164
 165     Init();
 166
 167     glutReshapeFunc(Reshape);
 168     glutKeyboardFunc(Key);
 169     glutDisplayFunc(Draw);
 170     glutMainLoop();
 171         return 0;
 172 }