Simple test for GL_MESA_pack_invert.

1 files changed, 180 insertions, 0 deletions

diff --git a/progs/tests/invert.c b/progs/tests/invert.c
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+/*
+ * (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 invert.c
+ * 
+ * Simple test of GL_MESA_pack_invert functionality.  Three squares are
+ * drawn.  The first two should look the same, and the third one should
+ * look inverted.
+ *
+ * \author Ian Romanick <[email protected]>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <GL/glut.h>
+
+#include "readtex.h"
+
+#define IMAGE_FILE "../images/tree3.rgb"
+
+static int Width = 420;
+static int Height = 150;
+static const GLfloat Near = 5.0, Far = 25.0;
+
+static GLubyte * image = NULL;
+static GLubyte * temp_image = NULL;
+static GLuint img_width = 0;
+static GLuint img_height = 0;
+static GLuint img_format = 0;
+
+PFNGLWINDOWPOS2IPROC win_pos_2i = NULL;
+
+
+static void Display( void )
+{
+   glClearColor(0.2, 0.2, 0.8, 0);
+   glClear( GL_COLOR_BUFFER_BIT );
+
+
+   /* This is the "reference" square.
+    */
+
+   (*win_pos_2i)( 5, 5 );
+   glDrawPixels( img_width, img_height, img_format, GL_UNSIGNED_BYTE, image );
+
+   glPixelStorei( GL_PACK_INVERT_MESA, GL_FALSE );
+   glReadPixels( 5, 5, img_width, img_height, img_format, GL_UNSIGNED_BYTE, temp_image );
+   (*win_pos_2i)( 5 + 1 * (10 + img_width), 5 );
+   glDrawPixels( img_width, img_height, img_format, GL_UNSIGNED_BYTE, temp_image );
+
+   glPixelStorei( GL_PACK_INVERT_MESA, GL_TRUE );
+   glReadPixels( 5, 5, img_width, img_height, img_format, GL_UNSIGNED_BYTE, temp_image );
+   (*win_pos_2i)( 5 + 2 * (10 + img_width), 5 );
+   glDrawPixels( img_width, img_height, img_format, GL_UNSIGNED_BYTE, temp_image );
+
+   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 );
+   const float ver = strtof( ver_string, NULL );
+
+
+   printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+   printf("GL_VERSION = %s\n", ver_string);
+
+   if ( !glutExtensionSupported("GL_MESA_pack_invert") ) {
+      printf("\nSorry, this program requires GL_MESA_pack_invert.\n");
+      exit(1);
+   }
+
+   if ( ver >= 1.4 ) {
+      win_pos_2i = (PFNGLWINDOWPOS2IPROC) glutGetProcAddress( "glWindowPos2i" );
+   }
+   else if ( glutExtensionSupported("GL_ARB_window_pos") ) {
+      win_pos_2i = (PFNGLWINDOWPOS2IPROC) glutGetProcAddress( "glWindowPos2iARB" );
+   }
+   else if ( glutExtensionSupported("GL_MESA_window_pos") ) {
+      win_pos_2i = (PFNGLWINDOWPOS2IPROC) glutGetProcAddress( "glWindowPos2iMESA" );
+   }
+   
+
+   /* Do this check as a separate if-statement instead of as an else in case
+    * one of the required extensions is supported but glutGetProcAddress
+    * returns NULL.
+    */
+
+   if ( win_pos_2i == NULL ) {
+      printf("\nSorry, this program requires either GL 1.4 (or higher),\n"
+	     "GL_ARB_window_pos, or GL_MESA_window_pos.\n");
+      exit(1);
+   }
+
+   printf("\nThe left 2 squares should be the same color, and the right\n"
+	  "square should look upside-down.\n");
+   
+
+   image = LoadRGBImage( IMAGE_FILE, & img_width, & img_height,
+			 & img_format );
+   if ( image == NULL ) {
+      printf( "Could not open image file \"%s\".\n", IMAGE_FILE );
+      exit(1);
+   }
+
+   temp_image = malloc( 3 * img_height * img_width );
+   if ( temp_image == NULL ) {
+      printf( "Could not allocate memory for temporary image.\n" );
+      exit(1);
+   }
+}
+
+
+int main( int argc, char *argv[] )
+{
+   glutInit( &argc, argv );
+   glutInitWindowPosition( 0, 0 );
+   glutInitWindowSize( Width, Height );
+   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+   glutCreateWindow( "GL_MESA_pack_invert test" );
+   glutReshapeFunc( Reshape );
+   glutKeyboardFunc( Key );
+   glutDisplayFunc( Display );
+   Init();
+   glutMainLoop();
+   return 0;
+}