Simple test for ARB_texture_env_crossbar functionality. It is difficult

to come up with good tests for this functionality that don't require
either ATI_texture_env_combine3 or NV_texture_env_combine4.

2 files changed, 236 insertions, 0 deletions

diff --git a/progs/tests/Makefile b/progs/tests/Makefile
index 34eb404..dbcb088 100644
--- a/progs/tests/Makefile
+++ b/progs/tests/Makefile
@@ -22,6 +22,7 @@ SOURCES = antialias.c \
 	blendminmax.c \
 	blendsquare.c \
 	bufferobj.c \
+	crossbar.c \
 	cva.c \
 	dinoshade.c \
 	floattex.c \
diff --git a/progs/tests/crossbar.c b/progs/tests/crossbar.c
new file mode 100644
index 0000000..12aabb1
--- /dev/null
+++ b/progs/tests/crossbar.c
@@ -0,0 +1,235 @@
+/*
+ * (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;
+}