| /* |
| * (C) Copyright IBM Corporation 2005 |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * on the rights to use, copy, modify, merge, publish, distribute, sub |
| * license, and/or sell copies of the Software, and to permit persons to whom |
| * the Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| /** |
| * \file crossbar.c |
| * |
| * Simple test of GL_ARB_texture_env_crossbar functionality. Several squares |
| * are drawn with different texture combine modes, but all should be rendered |
| * with the same final color. |
| * |
| * \author Ian Romanick <idr@us.ibm.com> |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <GL/glut.h> |
| |
| static const GLint tests[][8] = { |
| { 1, GL_REPLACE, GL_PRIMARY_COLOR, GL_PRIMARY_COLOR, |
| 2, GL_REPLACE, GL_TEXTURE, GL_PRIMARY_COLOR }, |
| { 3, GL_REPLACE, GL_PRIMARY_COLOR, GL_PRIMARY_COLOR, |
| 2, GL_SUBTRACT, GL_TEXTURE0, GL_TEXTURE1 }, |
| { 2, GL_REPLACE, GL_PRIMARY_COLOR, GL_PRIMARY_COLOR, |
| 2, GL_REPLACE, GL_TEXTURE0, GL_TEXTURE0 }, |
| { 2, GL_REPLACE, GL_PRIMARY_COLOR, GL_PRIMARY_COLOR, |
| 1, GL_SUBTRACT, GL_TEXTURE0, GL_TEXTURE1 }, |
| { 3, GL_ADD, GL_TEXTURE1, GL_TEXTURE1, |
| 2, GL_MODULATE, GL_TEXTURE1, GL_PREVIOUS }, |
| { 3, GL_ADD, GL_TEXTURE1, GL_TEXTURE1, |
| 4, GL_MODULATE, GL_TEXTURE0, GL_PREVIOUS }, |
| }; |
| |
| #define NUM_TESTS (sizeof(tests) / sizeof(tests[0])) |
| |
| static int Width = 100 * (NUM_TESTS + 1); |
| static int Height = 200; |
| static const GLfloat Near = 5.0, Far = 25.0; |
| |
| |
| static void Display( void ) |
| { |
| unsigned i; |
| |
| |
| glClearColor(0.2, 0.2, 0.8, 0); |
| glClear( GL_COLOR_BUFFER_BIT ); |
| |
| glPushMatrix(); |
| |
| /* This is the "reference" square. |
| */ |
| |
| glActiveTexture( GL_TEXTURE0 ); |
| glDisable( GL_TEXTURE_2D ); |
| glActiveTexture( GL_TEXTURE1 ); |
| glDisable( GL_TEXTURE_2D ); |
| |
| glTranslatef(-(NUM_TESTS * 1.5), 0, 0); |
| glBegin(GL_QUADS); |
| glColor3f( 0.5, 0.5, 0.5 ); |
| glVertex2f(-1, -1); |
| glVertex2f( 1, -1); |
| glVertex2f( 1, 1); |
| glVertex2f(-1, 1); |
| glEnd(); |
| |
| for ( i = 0 ; i < NUM_TESTS ; i++ ) { |
| glActiveTexture( GL_TEXTURE0 ); |
| glEnable( GL_TEXTURE_2D ); |
| glBindTexture( GL_TEXTURE_2D, tests[i][0] ); |
| glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE ); |
| glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, tests[i][1] ); |
| glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, tests[i][2] ); |
| glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, tests[i][3] ); |
| |
| glActiveTexture( GL_TEXTURE1 ); |
| glEnable( GL_TEXTURE_2D ); |
| glBindTexture( GL_TEXTURE_2D, tests[i][4] ); |
| glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE ); |
| glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, tests[i][5] ); |
| glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, tests[i][6] ); |
| glTexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, tests[i][7] ); |
| |
| glCallList(1); |
| } |
| |
| glPopMatrix(); |
| |
| glutSwapBuffers(); |
| } |
| |
| |
| static void Reshape( int width, int height ) |
| { |
| GLfloat ar = (float) width / (float) height; |
| Width = width; |
| Height = height; |
| glViewport( 0, 0, width, height ); |
| glMatrixMode( GL_PROJECTION ); |
| glLoadIdentity(); |
| glFrustum( -ar, ar, -1.0, 1.0, Near, Far ); |
| glMatrixMode( GL_MODELVIEW ); |
| glLoadIdentity(); |
| glTranslatef( 0.0, 0.0, -15.0 ); |
| } |
| |
| |
| static void Key( unsigned char key, int x, int y ) |
| { |
| (void) x; |
| (void) y; |
| switch (key) { |
| case 27: |
| exit(0); |
| break; |
| } |
| glutPostRedisplay(); |
| } |
| |
| |
| static void Init( void ) |
| { |
| const char * const ver_string = (const char * const) |
| glGetString( GL_VERSION ); |
| float ver = strtof( ver_string, NULL ); |
| GLint tex_units; |
| GLint temp[ 256 ]; |
| |
| |
| printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); |
| printf("GL_VERSION = %s\n", ver_string); |
| |
| if ( (!glutExtensionSupported("GL_ARB_multitexture") |
| && (ver < 1.3)) |
| || (!glutExtensionSupported("GL_ARB_texture_env_combine") |
| && !glutExtensionSupported("GL_EXT_texture_env_combine") |
| && (ver < 1.3)) |
| || (!glutExtensionSupported("GL_ARB_texture_env_crossbar") |
| && !glutExtensionSupported("GL_NV_texture_env_combine4") |
| && (ver < 1.4)) ) { |
| printf("\nSorry, this program requires GL_ARB_multitexture and either\n" |
| "GL_ARB_texture_env_combine or GL_EXT_texture_env_combine (or OpenGL 1.3).\n" |
| "Either GL_ARB_texture_env_crossbar or GL_NV_texture_env_combine4 (or\n" |
| "OpenGL 1.4) are also required.\n"); |
| exit(1); |
| } |
| |
| glGetIntegerv( GL_MAX_TEXTURE_UNITS, & tex_units ); |
| if ( tex_units < 2 ) { |
| printf("\nSorry, this program requires at least 2 texture units.\n"); |
| exit(1); |
| } |
| |
| printf("\nAll %u squares should be the same color.\n", NUM_TESTS + 1); |
| |
| (void) memset( temp, 0x00, sizeof( temp ) ); |
| glBindTexture( GL_TEXTURE_2D, 1 ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ); |
| glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, |
| GL_RGBA, GL_UNSIGNED_BYTE, temp ); |
| |
| (void) memset( temp, 0x7f, sizeof( temp ) ); |
| glBindTexture( GL_TEXTURE_2D, 2 ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ); |
| glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, |
| GL_RGBA, GL_UNSIGNED_BYTE, temp ); |
| |
| (void) memset( temp, 0xff, sizeof( temp ) ); |
| glBindTexture( GL_TEXTURE_2D, 3 ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ); |
| glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, |
| GL_RGBA, GL_UNSIGNED_BYTE, temp ); |
| |
| (void) memset( temp, 0x3f, sizeof( temp ) ); |
| glBindTexture( GL_TEXTURE_2D, 4 ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); |
| glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ); |
| glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, |
| GL_RGBA, GL_UNSIGNED_BYTE, temp ); |
| |
| |
| glNewList( 1, GL_COMPILE ); |
| glTranslatef(3.0, 0, 0); |
| glBegin(GL_QUADS); |
| glColor3f( 0.9, 0.0, 0.0 ); |
| glMultiTexCoord2f( GL_TEXTURE0, 0.5, 0.5 ); |
| glMultiTexCoord2f( GL_TEXTURE1, 0.5, 0.5 ); |
| glVertex2f(-1, -1); |
| glVertex2f( 1, -1); |
| glVertex2f( 1, 1); |
| glVertex2f(-1, 1); |
| glEnd(); |
| glEndList(); |
| } |
| |
| |
| int main( int argc, char *argv[] ) |
| { |
| glutInit( &argc, argv ); |
| glutInitWindowPosition( 0, 0 ); |
| glutInitWindowSize( Width, Height ); |
| glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); |
| glutCreateWindow( "GL_ARB_texture_env_crossbar test" ); |
| glutReshapeFunc( Reshape ); |
| glutKeyboardFunc( Key ); |
| glutDisplayFunc( Display ); |
| Init(); |
| glutMainLoop(); |
| return 0; |
| } |