Removed the GL_SGIX/SGIS_pixel_texture extensions. Same thing can be

done with fragment programs nowadays.

1 files changed, 0 insertions, 210 deletions

diff --git a/progs/demos/pixeltex.c b/progs/demos/pixeltex.c
deleted file mode 100644
index 03e653a454..0000000000
--- a/progs/demos/pixeltex.c
+++ /dev/null
@@ -1,210 +0,0 @@
-/*
- * GL_SGIS_pixel_texture demo
- *
- * Brian Paul
- * 6 Apr 2000
- *
- * Copyright (C) 2000  Brian Paul   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
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
- * BRIAN PAUL 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.
- */
-
-
-/*
- * How this works:
- * 1. We load the image into a 2D texture.
- * 2. We generate a sequence of RGB images in which the R component
- *    is really the S texture coordinate and the G component is really
- *    the T texture coordinate.
- *    By warping the mapping from R to S and G to T we can get non-linear
- *    distortions.
- * 3. Draw the warped image (a 2-D warping function) with pixel texgen
- *    enabled.
- * 4. Loop over the warped images to animate.
- *
- * The pixel texgen extension can also be used to do color-space
- * conversions.  For example, we could convert YCR to RGB with a
- * 3D texture map which takes YCR as the S,T,R texture coordinate and
- * returns RGB texel values.
- *
- * You can use this extension in (at least) two ways:
- * 1. glDrawPixels w/ color space conversion/warping
- * 2. glDrawPixels to spatially warp another image in texture memory
- *
- * We're basically using glDrawPixels to draw a texture coordinate image.
- */
-
-
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <GL/glut.h>
-#include <GL/glext.h>
-#include "readtex.h"
-
-#define TEXTURE_FILE "../images/girl.rgb"
-
-static int ImgWidth = 300, ImgHeight = 300;
-#define FRAMES 20
-static GLubyte *ImgData[FRAMES];
-static GLint Frame = 0;
-
-static GLboolean TextureFlag = GL_TRUE;
-
-
-static void Display( void )
-{
-   glClear( GL_COLOR_BUFFER_BIT );
-
-   if (TextureFlag) {
-      glEnable(GL_PIXEL_TEXTURE_SGIS);
-      glEnable(GL_TEXTURE_2D);
-   }
-   else {
-      glDisable(GL_PIXEL_TEXTURE_SGIS);
-      glDisable(GL_TEXTURE_2D);
-   }
-
-   glColor3f(1, 1, 1);
-   glRasterPos2f(10, 10);
-   glDrawPixels(ImgWidth, ImgHeight, GL_RGB, GL_UNSIGNED_BYTE, ImgData[Frame]);
-
-   glutSwapBuffers();
-}
-
-
-static void Reshape( int width, int height )
-{
-   glViewport( 0, 0, width, height );
-   glMatrixMode( GL_PROJECTION );
-   glLoadIdentity();
-   glOrtho(0, width, 0, height, -1, 1);
-   glMatrixMode( GL_MODELVIEW );
-   glLoadIdentity();
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
-   (void) x;
-   (void) y;
-   switch (key) {
-      case ' ':
-         TextureFlag = !TextureFlag;
-         break;
-      case 27:
-         exit(0);
-         break;
-   }
-   glutPostRedisplay();
-}
-
-
-static void Idle(void)
-{
-   Frame++;
-   if (Frame >= FRAMES)
-      Frame = 0;
-   glutPostRedisplay();
-}
-
-
-static GLubyte warp(GLfloat s, int frame)
-{
-   static const GLfloat pi = 3.14159265;
-   static int halfFrame = FRAMES / 2;
-   GLfloat y, weight, v;
-   if (frame >= halfFrame)
-      frame = halfFrame - (frame - halfFrame);
-   y = sin(s * pi);
-   weight = (float) frame / (FRAMES-1);
-   v = y * (0.8 * weight + 0.2);
-   return (GLint) (v * 255.0F);
-}
-
-
-static void InitImage(void)
-{
-   int i, j, frame;
-   for (frame = 0; frame < FRAMES; frame++) {
-      ImgData[frame] = (GLubyte *) malloc(ImgWidth * ImgHeight * 3);
-      for (i = 0; i < ImgHeight; i++) {
-         for (j = 0; j < ImgWidth; j++) {
-            GLubyte *pixel = ImgData[frame] + (i * ImgWidth + j) * 3;
-            pixel[0] = warp((float) j / (ImgWidth - 0), frame);
-            pixel[1] = warp((float) i / (ImgHeight - 0), frame);
-            pixel[2] = 0.0;
-         }
-      }
-   }
-}
-
-
-static void Init( int argc, char *argv[] )
-{
-   const char *exten = (const char *) glGetString(GL_EXTENSIONS);
-   if (!strstr(exten, "GL_SGIS_pixel_texture")) {
-      printf("Sorry, GL_SGIS_pixel_texture not supported by this renderer.\n");
-      exit(1);
-   }
-
-   /* linear filtering looks nicer, but it's slower, since it's in software */
-#if 1
-   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-#else
-   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-#endif
-
-   glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-
-   glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-
-   if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
-      printf("Error: couldn't load texture image\n");
-      exit(1);
-   }
-
-   glClearColor(0.3, 0.3, 0.4, 1.0);
-
-   InitImage();
-
-   printf("Hit SPACE to toggle pixel texgen\n");
-}
-
-
-int main( int argc, char *argv[] )
-{
-   glutInit( &argc, argv );
-   glutInitWindowSize( 330, 330 );
-   glutInitWindowPosition( 0, 0 );
-   glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
-   glutCreateWindow(argv[0] );
-
-   Init( argc, argv );
-
-   glutKeyboardFunc( Key );
-   glutReshapeFunc( Reshape );
-   glutDisplayFunc( Display );
-   glutIdleFunc( Idle );
-
-   glutMainLoop();
-   return 0;
-}