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 #define GL_GLEXT_PROTOTYPES
  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
  55    /* Setup the fragment program */
  56    glGenProgramsARB(1, &prognum);
  57    glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, prognum);
  58    glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
  59                       strlen(prog1), (const GLubyte *)prog1);
  60
  61    errno = glGetError();
  62    printf("glGetError = 0x%x\n", errno);
  63    if (errno != GL_NO_ERROR) {
  64       GLint errorpos;
  65
  66       glGetIntegerv(GL_PROGRAM_ERROR_POSITION_ARB, &errorpos);
  67       printf("errorpos: %d\n", errorpos);
  68       printf("glError(GL_PROGRAM_ERROR_STRING_ARB) = %s\n",
  69              (char *) glGetString(GL_PROGRAM_ERROR_STRING_ARB));
  70    }
  71    glEnable(GL_FRAGMENT_PROGRAM_ARB);
  72
  73     glClearColor(0.0, 0.0, 1.0, 0.0);
  74 }
  75
  76 static void Reshape(int width, int height)
  77 {
  78
  79     glViewport(0, 0, (GLint)width, (GLint)height);
  80
  81     glMatrixMode(GL_PROJECTION);
  82     glLoadIdentity();
  83 /*     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
  84     glMatrixMode(GL_MODELVIEW);
  85 }
  86
  87 static void Key(unsigned char key, int x, int y)
  88 {
  89
  90     switch (key) {
  91       case 27:
  92         exit(1);
  93       default:
  94         return;
  95     }
  96
  97     glutPostRedisplay();
  98 }
  99
 100 static void Draw(void)
 101 {
 102    glClear(GL_COLOR_BUFFER_BIT);
 103
 104    glBegin(GL_TRIANGLES);
 105    glColor3f(0,0,.7);
 106    glTexCoord3f(0,0,.7);
 107    glVertex3f( 0.9, -0.9, -0.0);
 108    glColor3f(.8,0,0);
 109    glTexCoord3f(.8,0,0);
 110    glVertex3f( 0.9,  0.9, -0.0);
 111    glColor3f(0,.9,0);
 112    glTexCoord3f(0,.9,0);
 113    glVertex3f(-0.9,  0.0, -0.0);
 114    glEnd();
 115
 116    glFlush();
 117
 118    if (doubleBuffer) {
 119       glutSwapBuffers();
 120    }
 121 }
 122
 123 static GLenum Args(int argc, char **argv)
 124 {
 125     GLint i;
 126
 127     doubleBuffer = GL_FALSE;
 128
 129     for (i = 1; i < argc; i++) {
 130         if (strcmp(argv[i], "-sb") == 0) {
 131             doubleBuffer = GL_FALSE;
 132         } else if (strcmp(argv[i], "-db") == 0) {
 133             doubleBuffer = GL_TRUE;
 134         } else {
 135             fprintf(stderr, "%s (Bad option).\n", argv[i]);
 136             return GL_FALSE;
 137         }
 138     }
 139     return GL_TRUE;
 140 }
 141
 142 int main(int argc, char **argv)
 143 {
 144     GLenum type;
 145
 146     glutInit(&argc, argv);
 147
 148     if (Args(argc, argv) == GL_FALSE) {
 149         exit(1);
 150     }
 151
 152     glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
 153
 154     type = GLUT_RGB | GLUT_ALPHA;
 155     type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
 156     glutInitDisplayMode(type);
 157
 158     if (glutCreateWindow("First Tri") == GL_FALSE) {
 159         exit(1);
 160     }
 161
 162     Init();
 163
 164     glutReshapeFunc(Reshape);
 165     glutKeyboardFunc(Key);
 166     glutDisplayFunc(Draw);
 167     glutMainLoop();
 168         return 0;
 169 }