progs/tests/bumpmap.c

   1 /*
   2  * Copyright (c) 2009 VMware, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  19  * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * Simple test for testing ATI_envmap_bumpmap support.
  27  */
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <math.h>
  33 #include <GL/glut.h>
  34
  35 #include "readtex.h"
  36
  37 static PFNGLGETTEXBUMPPARAMETERFVATIPROC glGetTexBumpParameterfvATI_func = NULL;
  38 static PFNGLGETTEXBUMPPARAMETERIVATIPROC glGetTexBumpParameterivATI_func = NULL;
  39 static PFNGLTEXBUMPPARAMETERFVATIPROC glTexBumpParameterfvATI_func = NULL;
  40
  41 static const char *TexFile = "../images/arch.rgb";
  42
  43 static const GLfloat Near = 5.0, Far = 25.0;
  44
  45 static void Display( void )
  46 {
  47    /* together with the construction of dudv map, do fixed translation
  48       in y direction (up), some cosine deformation in x and more
  49       deformation in y dir */
  50    GLfloat bumpMatrix[4] = {0.1, 0.0, 0.2, 0.1};
  51
  52
  53    glClearColor(0.2, 0.2, 0.8, 0);
  54    glClear( GL_COLOR_BUFFER_BIT );
  55
  56    glPushMatrix();
  57
  58    /* this is the base map */
  59    glActiveTexture( GL_TEXTURE0 );
  60    glEnable( GL_TEXTURE_2D );
  61    glBindTexture( GL_TEXTURE_2D, 1 );
  62    glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
  63    glTexEnvf( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE );
  64    glTexEnvf( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE );
  65
  66    /* bump map */
  67    glActiveTexture( GL_TEXTURE1 );
  68    glEnable( GL_TEXTURE_2D );
  69    glBindTexture( GL_TEXTURE_2D, 2 );
  70    glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
  71    glTexEnvf( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_BUMP_ENVMAP_ATI );
  72    glTexEnvf( GL_TEXTURE_ENV, GL_BUMP_TARGET_ATI, GL_TEXTURE0);
  73
  74    glTexBumpParameterfvATI_func(GL_BUMP_ROT_MATRIX_ATI, bumpMatrix);
  75
  76    glCallList(1);
  77
  78    glPopMatrix();
  79
  80    glutSwapBuffers();
  81 }
  82
  83
  84 static void Reshape( int width, int height )
  85 {
  86    GLfloat ar = (float) width / (float) height;
  87    glViewport( 0, 0, width, height );
  88    glMatrixMode( GL_PROJECTION );
  89    glLoadIdentity();
  90    glFrustum( -ar, ar, -1.0, 1.0, Near, Far );
  91    glMatrixMode( GL_MODELVIEW );
  92    glLoadIdentity();
  93    glTranslatef( 0.0, 0.0, -6.0 );
  94 }
  95
  96
  97 static void Key( unsigned char key, int x, int y )
  98 {
  99    (void) x;
 100    (void) y;
 101    switch (key) {
 102       case 27:
 103          exit(0);
 104          break;
 105    }
 106    glutPostRedisplay();
 107 }
 108
 109
 110 static void Init( void )
 111 {
 112    const char * const ver_string = (const char * const)
 113        glGetString( GL_VERSION );
 114    GLfloat temp[16][16][2];
 115    GLubyte *image = NULL;
 116    GLint imgWidth, imgHeight;
 117    GLenum imgFormat;
 118    GLint i,j;
 119    GLint param, paramArray[16];
 120    GLfloat paramMat[4];
 121
 122    printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 123    printf("GL_VERSION = %s\n", ver_string);
 124
 125    if ( !glutExtensionSupported("GL_ATI_envmap_bumpmap")) {
 126       printf("\nSorry, this program requires GL_ATI_envmap_bumpmap\n");
 127       exit(1);
 128    }
 129
 130    glGetTexBumpParameterfvATI_func = glutGetProcAddress("glGetTexBumpParameterfvATI");
 131    glGetTexBumpParameterivATI_func = glutGetProcAddress("glGetTexBumpParameterivATI");
 132    glTexBumpParameterfvATI_func = glutGetProcAddress("glTexBumpParameterfvATI");
 133
 134    glGetTexBumpParameterivATI_func(GL_BUMP_ROT_MATRIX_SIZE_ATI, &param);
 135    printf("BUMP_ROT_MATRIX_SIZE_ATI = %d\n", param);
 136    glGetTexBumpParameterivATI_func(GL_BUMP_NUM_TEX_UNITS_ATI, &param);
 137    printf("BUMP_NUM_TEX_UNITS_ATI = %d\n", param);
 138    glGetTexBumpParameterfvATI_func(GL_BUMP_ROT_MATRIX_ATI, paramMat);
 139    printf("initial rot matrix %f %f %f %f\n", paramMat[0], paramMat[1], paramMat[2], paramMat[3]);
 140    glGetTexBumpParameterivATI_func(GL_BUMP_TEX_UNITS_ATI, paramArray);
 141    printf("units supporting bump mapping: ");
 142    for (i = 0; i < param; i++)
 143       printf("%d ", paramArray[i] - GL_TEXTURE0);
 144    printf("\n");
 145
 146    image = LoadRGBImage(TexFile, &imgWidth, &imgHeight, &imgFormat);
 147    if (!image) {
 148       printf("Couldn't read %s\n", TexFile);
 149       exit(0);
 150    }
 151
 152    glBindTexture( GL_TEXTURE_2D, 1 );
 153    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 154    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 155    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 156    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 157    glTexImage2D( GL_TEXTURE_2D, 0, imgFormat, imgWidth, imgHeight, 0,
 158                  imgFormat, GL_UNSIGNED_BYTE, image );
 159
 160    for (j = 0; j < 16; j++) {
 161       for (i = 0; i < 16; i++) {
 162          temp[j][i][0] = cos((float)(i) * 3.1415 / 16.0);
 163          temp[j][i][1] = -0.5;
 164       }
 165    }
 166    glBindTexture( GL_TEXTURE_2D, 2 );
 167    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 168    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 169    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 170    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 171    glTexImage2D( GL_TEXTURE_2D, 0, GL_DU8DV8_ATI, 16, 16, 0,
 172                  GL_DUDV_ATI, GL_FLOAT, temp );
 173
 174
 175    glNewList( 1, GL_COMPILE );
 176    glBegin(GL_QUADS);
 177    glColor3f( 0.9, 0.0, 0.0 );
 178    glMultiTexCoord2f( GL_TEXTURE0, 0.0, 0.0 );
 179    glMultiTexCoord2f( GL_TEXTURE1, 0.0, 0.0 );
 180    glVertex2f(-1, -1);
 181    glMultiTexCoord2f( GL_TEXTURE0, 1.0, 0.0 );
 182    glMultiTexCoord2f( GL_TEXTURE1, 1.0, 0.0 );
 183    glVertex2f( 1, -1);
 184    glMultiTexCoord2f( GL_TEXTURE0, 1.0, 1.0 );
 185    glMultiTexCoord2f( GL_TEXTURE1, 1.0, 1.0 );
 186    glVertex2f( 1,  1);
 187    glMultiTexCoord2f( GL_TEXTURE0, 0.0, 1.0 );
 188    glMultiTexCoord2f( GL_TEXTURE1, 0.0, 1.0 );
 189    glVertex2f(-1,  1);
 190    glEnd();
 191    glEndList();
 192 }
 193
 194
 195 int main( int argc, char *argv[] )
 196 {
 197    glutInit( &argc, argv );
 198    glutInitWindowPosition( 0, 0 );
 199    glutInitWindowSize( 400, 400 );
 200    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
 201    glutCreateWindow( "GL_ATI_envmap_bumpmap test" );
 202    glutReshapeFunc( Reshape );
 203    glutKeyboardFunc( Key );
 204    glutDisplayFunc( Display );
 205    Init();
 206    glutMainLoop();
 207    return 0;
 208 }