src/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/glew.h>
  34 #include "glut_wrap.h"
  35
  36 #include "readtex.h"
  37
  38 static const char *TexFile = DEMOS_DATA_DIR "arch.rgb";
  39
  40 static const GLfloat Near = 5.0, Far = 25.0;
  41
  42 static void Display( void )
  43 {
  44    /* together with the construction of dudv map, do fixed translation
  45       in y direction (up), some cosine deformation in x and more
  46       deformation in y dir */
  47    GLfloat bumpMatrix[4] = {0.1, 0.0, 0.2, 0.1};
  48
  49
  50    glClearColor(0.2, 0.2, 0.8, 0);
  51    glClear( GL_COLOR_BUFFER_BIT );
  52
  53    glPushMatrix();
  54
  55    /* this is the base map */
  56    glActiveTexture( GL_TEXTURE0 );
  57    glEnable( GL_TEXTURE_2D );
  58    glBindTexture( GL_TEXTURE_2D, 1 );
  59    glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
  60    glTexEnvf( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE );
  61    glTexEnvf( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE );
  62
  63    /* bump map */
  64    glActiveTexture( GL_TEXTURE1 );
  65    glEnable( GL_TEXTURE_2D );
  66    glBindTexture( GL_TEXTURE_2D, 2 );
  67    glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
  68    glTexEnvf( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_BUMP_ENVMAP_ATI );
  69    glTexEnvf( GL_TEXTURE_ENV, GL_BUMP_TARGET_ATI, GL_TEXTURE0);
  70
  71    glTexBumpParameterfvATI(GL_BUMP_ROT_MATRIX_ATI, bumpMatrix);
  72
  73    glCallList(1);
  74
  75    glPopMatrix();
  76
  77    glutSwapBuffers();
  78 }
  79
  80
  81 static void Reshape( int width, int height )
  82 {
  83    GLfloat ar = (float) width / (float) height;
  84    glViewport( 0, 0, width, height );
  85    glMatrixMode( GL_PROJECTION );
  86    glLoadIdentity();
  87    glFrustum( -ar, ar, -1.0, 1.0, Near, Far );
  88    glMatrixMode( GL_MODELVIEW );
  89    glLoadIdentity();
  90    glTranslatef( 0.0, 0.0, -6.0 );
  91 }
  92
  93
  94 static void Key( unsigned char key, int x, int y )
  95 {
  96    (void) x;
  97    (void) y;
  98    switch (key) {
  99       case 27:
 100          exit(0);
 101          break;
 102    }
 103    glutPostRedisplay();
 104 }
 105
 106
 107 static void Init( void )
 108 {
 109    const char * const ver_string = (const char *)
 110        glGetString( GL_VERSION );
 111    GLfloat temp[16][16][2];
 112    GLubyte *image = NULL;
 113    GLint imgWidth, imgHeight;
 114    GLenum imgFormat;
 115    GLint i,j;
 116    GLint param, paramArray[16];
 117    GLfloat paramMat[4];
 118
 119    printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 120    printf("GL_VERSION = %s\n", ver_string);
 121
 122    if ( !glutExtensionSupported("GL_ATI_envmap_bumpmap")) {
 123       printf("\nSorry, this program requires GL_ATI_envmap_bumpmap\n");
 124       exit(1);
 125    }
 126
 127    glGetTexBumpParameterivATI(GL_BUMP_ROT_MATRIX_SIZE_ATI, &param);
 128    printf("BUMP_ROT_MATRIX_SIZE_ATI = %d\n", param);
 129    glGetTexBumpParameterivATI(GL_BUMP_NUM_TEX_UNITS_ATI, &param);
 130    printf("BUMP_NUM_TEX_UNITS_ATI = %d\n", param);
 131    glGetTexBumpParameterfvATI(GL_BUMP_ROT_MATRIX_ATI, paramMat);
 132    printf("initial rot matrix %f %f %f %f\n", paramMat[0], paramMat[1], paramMat[2], paramMat[3]);
 133    glGetTexBumpParameterivATI(GL_BUMP_TEX_UNITS_ATI, paramArray);
 134    printf("units supporting bump mapping: ");
 135    for (i = 0; i < param; i++)
 136       printf("%d ", paramArray[i] - GL_TEXTURE0);
 137    printf("\n");
 138
 139    image = LoadRGBImage(TexFile, &imgWidth, &imgHeight, &imgFormat);
 140    if (!image) {
 141       printf("Couldn't read %s\n", TexFile);
 142       exit(0);
 143    }
 144
 145    glBindTexture( GL_TEXTURE_2D, 1 );
 146    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 147    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 148    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 149    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 150    glTexImage2D( GL_TEXTURE_2D, 0, imgFormat, imgWidth, imgHeight, 0,
 151                  imgFormat, GL_UNSIGNED_BYTE, image );
 152
 153    for (j = 0; j < 16; j++) {
 154       for (i = 0; i < 16; i++) {
 155          temp[j][i][0] = cos((float)(i) * 3.1415 / 16.0);
 156          temp[j][i][1] = -0.5;
 157       }
 158    }
 159    glBindTexture( GL_TEXTURE_2D, 2 );
 160    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 161    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 162    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 163    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 164    glTexImage2D( GL_TEXTURE_2D, 0, GL_DU8DV8_ATI, 16, 16, 0,
 165                  GL_DUDV_ATI, GL_FLOAT, temp );
 166
 167
 168    glNewList( 1, GL_COMPILE );
 169    glBegin(GL_QUADS);
 170    glColor3f( 0.9, 0.0, 0.0 );
 171    glMultiTexCoord2f( GL_TEXTURE0, 0.0, 0.0 );
 172    glMultiTexCoord2f( GL_TEXTURE1, 0.0, 0.0 );
 173    glVertex2f(-1, -1);
 174    glMultiTexCoord2f( GL_TEXTURE0, 1.0, 0.0 );
 175    glMultiTexCoord2f( GL_TEXTURE1, 1.0, 0.0 );
 176    glVertex2f( 1, -1);
 177    glMultiTexCoord2f( GL_TEXTURE0, 1.0, 1.0 );
 178    glMultiTexCoord2f( GL_TEXTURE1, 1.0, 1.0 );
 179    glVertex2f( 1,  1);
 180    glMultiTexCoord2f( GL_TEXTURE0, 0.0, 1.0 );
 181    glMultiTexCoord2f( GL_TEXTURE1, 0.0, 1.0 );
 182    glVertex2f(-1,  1);
 183    glEnd();
 184    glEndList();
 185 }
 186
 187
 188 int main( int argc, char *argv[] )
 189 {
 190    glutInit( &argc, argv );
 191    glutInitWindowPosition( 0, 0 );
 192    glutInitWindowSize( 400, 400 );
 193    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
 194    glutCreateWindow( "GL_ATI_envmap_bumpmap test" );
 195    glewInit();
 196    glutReshapeFunc( Reshape );
 197    glutKeyboardFunc( Key );
 198    glutDisplayFunc( Display );
 199    Init();
 200    glutMainLoop();
 201    return 0;
 202 }