tests/texturing/crossbar.c

   1 /*
   2  * (C) Copyright IBM Corporation 2005
   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  * \file crossbar.c
  27  *
  28  * Simple test of GL_ARB_texture_env_crossbar functionality.  Several squares
  29  * are drawn with different texture combine modes, but all should be rendered
  30  * with the same final color.
  31  *
  32  * \author Ian Romanick <idr@us.ibm.com>
  33  */
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <GL/glut.h>
  39
  40 static const GLint tests[][8] = {
  41    { 1, GL_REPLACE,  GL_PRIMARY_COLOR, GL_PRIMARY_COLOR,
  42      2, GL_REPLACE,  GL_TEXTURE,       GL_PRIMARY_COLOR },
  43    { 3, GL_REPLACE,  GL_PRIMARY_COLOR, GL_PRIMARY_COLOR,
  44      2, GL_SUBTRACT, GL_TEXTURE0,      GL_TEXTURE1 },
  45    { 2, GL_REPLACE,  GL_PRIMARY_COLOR, GL_PRIMARY_COLOR,
  46      2, GL_REPLACE,  GL_TEXTURE0,      GL_TEXTURE0 },
  47    { 2, GL_REPLACE,  GL_PRIMARY_COLOR, GL_PRIMARY_COLOR,
  48      1, GL_SUBTRACT, GL_TEXTURE0,      GL_TEXTURE1 },
  49    { 3, GL_ADD,      GL_TEXTURE1,      GL_TEXTURE1,
  50      2, GL_MODULATE, GL_TEXTURE1,      GL_PREVIOUS },
  51    { 3, GL_ADD,      GL_TEXTURE1,      GL_TEXTURE1,
  52      4, GL_MODULATE, GL_TEXTURE0,      GL_PREVIOUS },
  53 };
  54
  55 #define NUM_TESTS (sizeof(tests) / sizeof(tests[0]))
  56
  57 static int Width = 100 * (NUM_TESTS + 1);
  58 static int Height = 100;
  59 static int Interactive = 1;
  60
  61
  62 static void DoFrame( void )
  63 {
  64    unsigned i;
  65
  66    glClearColor(0.0, 0.0, 1.0, 0);
  67    glClear( GL_COLOR_BUFFER_BIT );
  68
  69    glPushMatrix();
  70
  71    /* This is the "reference" square.
  72     */
  73
  74    glActiveTexture( GL_TEXTURE0 );
  75    glDisable( GL_TEXTURE_2D );
  76    glActiveTexture( GL_TEXTURE1 );
  77    glDisable( GL_TEXTURE_2D );
  78
  79    glTranslatef(1.5, 0.0, 0.0);
  80    glBegin(GL_QUADS);
  81    glColor3f( 0.5, 0.5, 0.5 );
  82    glVertex2f(-1, -1);
  83    glVertex2f( 1, -1);
  84    glVertex2f( 1,  1);
  85    glVertex2f(-1,  1);
  86    glEnd();
  87
  88    for ( i = 0 ; i < NUM_TESTS ; i++ ) {
  89       glActiveTexture( GL_TEXTURE0 );
  90       glEnable( GL_TEXTURE_2D );
  91       glBindTexture( GL_TEXTURE_2D, tests[i][0] );
  92       glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
  93       glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, tests[i][1] );
  94       glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, tests[i][2] );
  95       glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, tests[i][3] );
  96
  97       glActiveTexture( GL_TEXTURE1 );
  98       glEnable( GL_TEXTURE_2D );
  99       glBindTexture( GL_TEXTURE_2D, tests[i][4] );
 100       glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
 101       glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, tests[i][5] );
 102       glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, tests[i][6] );
 103       glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, tests[i][7] );
 104
 105       glCallList(1);
 106    }
 107
 108    glPopMatrix();
 109
 110 }
 111
 112 static int DoTest( void )
 113 {
 114    int i;
 115    GLfloat probe[NUM_TESTS+1][4];
 116    GLfloat dr, dg, db;
 117    GLfloat dmax;
 118
 119    glReadBuffer( GL_BACK );
 120
 121    dmax = 0;
 122    for( i = 0; i <= NUM_TESTS; ++i ) {
 123       glReadPixels(Width*(2*i+1)/((NUM_TESTS+1)*2), Height/2, 1, 1, GL_RGBA, GL_FLOAT, probe[i]);
 124       printf("Probe %i: %f,%f,%f\n", i, probe[i][0], probe[i][1], probe[i][2]);
 125       dr = probe[i][0] - 0.5f;
 126       dg = probe[i][1] - 0.5f;
 127       db = probe[i][2] - 0.5f;
 128       printf("   Delta: %f,%f,%f\n", dr, dg, db);
 129       if (dr > dmax) dmax = dr;
 130       else if (-dr > dmax) dmax = -dr;
 131       if (dg > dmax) dmax = dg;
 132       else if (-dg > dmax) dmax = -dg;
 133       if (db > dmax) dmax = db;
 134       else if (-db > dmax) dmax = -db;
 135    }
 136
 137    printf("Max delta: %f\n", dmax);
 138
 139    if (dmax >= 0.07) // roughly 1/128
 140       return 0;
 141    else
 142       return 1;
 143 }
 144
 145 static void Display( void )
 146 {
 147    if (Interactive) {
 148       DoFrame();
 149       glutSwapBuffers();
 150    } else {
 151       int success, retry;
 152
 153       printf("\nFirst frame\n-----------\n");
 154       DoFrame();
 155       success = DoTest();
 156       glutSwapBuffers();
 157
 158       printf("\nSecond frame\n------------\n");
 159       glMatrixMode( GL_PROJECTION );
 160       glLoadIdentity();
 161       glOrtho( 0, 3*(NUM_TESTS+1), -1.5, 1.5, -1, 1 );
 162       glMatrixMode( GL_MODELVIEW );
 163       glLoadIdentity();
 164
 165       DoFrame();
 166       retry = DoTest();
 167       glutSwapBuffers();
 168
 169       if (retry && success) {
 170          printf("\nPIGLIT: { 'result': 'pass' }\n");
 171       } else if (retry || success) {
 172          printf("\nPIGLIT: { 'result': 'warn', 'note': 'Inconsistent results in first and second frame' }\n");
 173       } else {
 174          printf("\nPIGLIT: { 'result': 'fail' }\n");
 175       }
 176
 177       exit(0);
 178    }
 179 }
 180
 181
 182 static void Reshape( int width, int height )
 183 {
 184    Width = width;
 185    Height = height;
 186    glViewport( 0, 0, width, height );
 187    glMatrixMode( GL_PROJECTION );
 188    glLoadIdentity();
 189    glOrtho( 0, 3*(NUM_TESTS+1), -1.5, 1.5, -1, 1 );
 190    glMatrixMode( GL_MODELVIEW );
 191    glLoadIdentity();
 192 }
 193
 194
 195 static void Key( unsigned char key, int x, int y )
 196 {
 197    (void) x;
 198    (void) y;
 199    switch (key) {
 200       case 27:
 201          exit(0);
 202          break;
 203    }
 204    glutPostRedisplay();
 205 }
 206
 207
 208 static void Init( void )
 209 {
 210    const char * const ver_string = (const char * const)
 211        glGetString( GL_VERSION );
 212    float ver = strtof( ver_string, NULL );
 213    GLint tex_units;
 214    GLint temp[ 256 ];
 215
 216
 217    printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 218    printf("GL_VERSION = %s\n", ver_string);
 219
 220    if ( (!glutExtensionSupported("GL_ARB_multitexture")
 221          && (ver < 1.3))
 222         || (!glutExtensionSupported("GL_ARB_texture_env_combine")
 223             && !glutExtensionSupported("GL_EXT_texture_env_combine")
 224             && (ver < 1.3))
 225         || (!glutExtensionSupported("GL_ARB_texture_env_crossbar")
 226             && !glutExtensionSupported("GL_NV_texture_env_combine4")
 227             && (ver < 1.4)) ) {
 228       printf("\nSorry, this program requires GL_ARB_multitexture and either\n"
 229              "GL_ARB_texture_env_combine or GL_EXT_texture_env_combine (or OpenGL 1.3).\n"
 230              "Either GL_ARB_texture_env_crossbar or GL_NV_texture_env_combine4 (or\n"
 231              "OpenGL 1.4) are also required.\n");
 232       if (!Interactive)
 233          printf("PIGLIT: {'result': 'fail' }\n");
 234       exit(1);
 235    }
 236
 237    glGetIntegerv( GL_MAX_TEXTURE_UNITS, & tex_units );
 238    if ( tex_units < 2 ) {
 239       printf("\nSorry, this program requires at least 2 texture units.\n");
 240       if (!Interactive)
 241          printf("PIGLIT: {'result': 'fail' }\n");
 242       exit(1);
 243    }
 244
 245    if (Interactive)
 246       printf("\nAll %u squares should be the same color.\n", NUM_TESTS + 1);
 247
 248    (void) memset( temp, 0x00, sizeof( temp ) );
 249    glBindTexture( GL_TEXTURE_2D, 1 );
 250    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 251    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 252    glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0,
 253                  GL_RGBA, GL_UNSIGNED_BYTE, temp );
 254
 255    (void) memset( temp, 0x7f, sizeof( temp ) );
 256    glBindTexture( GL_TEXTURE_2D, 2 );
 257    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 258    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 259    glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0,
 260                  GL_RGBA, GL_UNSIGNED_BYTE, temp );
 261
 262    (void) memset( temp, 0xff, sizeof( temp ) );
 263    glBindTexture( GL_TEXTURE_2D, 3 );
 264    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 265    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 266    glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0,
 267                  GL_RGBA, GL_UNSIGNED_BYTE, temp );
 268
 269    (void) memset( temp, 0x3f, sizeof( temp ) );
 270    glBindTexture( GL_TEXTURE_2D, 4 );
 271    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
 272    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
 273    glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0,
 274                  GL_RGBA, GL_UNSIGNED_BYTE, temp );
 275
 276
 277    glNewList( 1, GL_COMPILE );
 278    glTranslatef(3.0, 0, 0);
 279    glBegin(GL_QUADS);
 280    glColor3f( 0.9, 0.0, 0.0 );
 281    glMultiTexCoord2f( GL_TEXTURE0, 0.5, 0.5 );
 282    glMultiTexCoord2f( GL_TEXTURE1, 0.5, 0.5 );
 283    glVertex2f(-1, -1);
 284    glVertex2f( 1, -1);
 285    glVertex2f( 1,  1);
 286    glVertex2f(-1,  1);
 287    glEnd();
 288    glEndList();
 289
 290    Reshape(Width, Height);
 291 }
 292
 293
 294 int main( int argc, char *argv[] )
 295 {
 296    glutInit( &argc, argv );
 297    if (argc == 2 && !strcmp(argv[1], "-auto"))
 298       Interactive = 0;
 299    glutInitWindowPosition( 0, 0 );
 300    glutInitWindowSize( Width, Height );
 301    glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
 302    glutCreateWindow( "GL_ARB_texture_env_crossbar test" );
 303    glutReshapeFunc( Reshape );
 304    glutKeyboardFunc( Key );
 305    glutDisplayFunc( Display );
 306    Init();
 307    glutMainLoop();
 308    return 0;
 309 }