demos: remove OSMESA stuff from Makefile

[mesa.git] / progs / demos / drawpix.c

diff --git a/progs/demos/drawpix.c b/progs/demos/drawpix.c
index 9f599890dbf8c9dcd79fbbd67f5d24c13a24ca36..d2f57486744ecb5b98b80da050b0cd270983542f 100644 (file)
--- a/progs/demos/drawpix.c
+++ b/progs/demos/drawpix.c
@@ -1,4 +1,3 @@
-/* $Id: drawpix.c,v 1.3 1999/10/28 18:23:29 brianp Exp $ */
 
 /*
  * glDrawPixels demo/test/benchmark
@@ -6,38 +5,13 @@
  * Brian Paul   September 25, 1997  This file is in the public domain.
  */
 
-/*
- * $Log: drawpix.c,v $
- * Revision 1.3  1999/10/28 18:23:29  brianp
- * minor changes to Usage() function
- *
- * Revision 1.2  1999/10/21 22:13:58  brianp
- * added f key to toggle front/back drawing
- *
- * Revision 1.1.1.1  1999/08/19 00:55:40  jtg
- * Imported sources
- *
- * Revision 3.3  1999/03/28 18:18:33  brianp
- * minor clean-up
- *
- * Revision 3.2  1998/11/05 04:34:04  brianp
- * moved image files to ../images/ directory
- *
- * Revision 3.1  1998/02/22 16:43:17  brianp
- * added a few casts to silence compiler warnings
- *
- * Revision 3.0  1998/02/14 18:42:29  brianp
- * initial rev
- *
- */
-
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
+#include <string.h>
 #include <GL/glut.h>
 
-#include "../util/readtex.c"  /* a hack, I know */
+#include "readtex.h"
 
 #define IMAGE_FILE "../images/girl.rgb"
 
@@ -49,9 +23,11 @@ static int Xpos, Ypos;
 static int SkipPixels, SkipRows;
 static int DrawWidth, DrawHeight;
 static int Scissor = 0;
+static int Fog = 0;
+static GLfloat Zpos = -1.0;
 static float Xzoom, Yzoom;
 static GLboolean DrawFront = GL_FALSE;
-
+static GLboolean Dither = GL_TRUE;
 
 
 static void Reset( void )
@@ -61,6 +37,8 @@ static void Reset( void )
    DrawHeight = ImgHeight;
    SkipPixels = SkipRows = 0;
    Scissor = 0;
+   Fog = 0;
+   Zpos = -1.0;
    Xzoom = Yzoom = 1.0;
 }
 
@@ -73,7 +51,7 @@ static void Display( void )
    glRasterPos2i(Xpos, Ypos);
 #else
    /* This allows negative raster positions: */
-   glRasterPos2i(0, 0);
+   glRasterPos3f(0, 0, Zpos);
    glBitmap(0, 0, 0, 0, Xpos, Ypos, NULL);
 #endif
 
@@ -85,11 +63,17 @@ static void Display( void )
    if (Scissor)
       glEnable(GL_SCISSOR_TEST);
 
+   if (Fog)
+      glEnable(GL_FOG);
+
    glDrawPixels(DrawWidth, DrawHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
 
    glDisable(GL_SCISSOR_TEST);
+   glDisable(GL_FOG);
 
-   if (!DrawFront)
+   if (DrawFront)
+      glFinish();
+   else
       glutSwapBuffers();
 }
 
@@ -107,6 +91,8 @@ static void Benchmark( void )
    glPixelZoom( Xzoom, Yzoom );
    if (Scissor)
       glEnable(GL_SCISSOR_TEST);
+   if (Fog)
+      glEnable(GL_FOG);
 
    if (DrawFront)
       glDrawBuffer(GL_FRONT);
@@ -124,6 +110,7 @@ static void Benchmark( void )
 
    /* GL clean-up */
    glDisable(GL_SCISSOR_TEST);
+   glDisable(GL_FOG);
 
    /* Results */
    seconds = (double) (endTime - startTime) / 1000.0;
@@ -138,7 +125,7 @@ static void Reshape( int width, int height )
    glViewport( 0, 0, width, height );
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
-   glOrtho( 0.0, width, 0.0, height, -1.0, 1.0 );
+   glOrtho( 0.0, width, 0.0, height, 0.0, 2.0 );
    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();
 
@@ -154,6 +141,13 @@ static void Key( unsigned char key, int x, int y )
       case ' ':
          Reset();
          break;
+      case 'd':
+         Dither = !Dither;
+         if (Dither)
+            glEnable(GL_DITHER);
+         else
+            glDisable(GL_DITHER);
+         break;
       case 'w':
          if (DrawWidth > 0)
             DrawWidth--;
@@ -197,9 +191,21 @@ static void Key( unsigned char key, int x, int y )
       case 'Y':
          Yzoom += 0.1;
          break;
+      case 'z':
+         Zpos -= 0.1;
+         printf("RasterPos Z = %g\n", Zpos);
+         break;
+      case 'Z':
+         Zpos += 0.1;
+         printf("RasterPos Z = %g\n", Zpos);
+         break;
       case 'b':
          Benchmark();
          break;
+      case 'F':
+         Fog = !Fog;
+         printf("Fog %d\n", Fog);
+         break;
       case 'f':
          DrawFront = !DrawFront;
          if (DrawFront)
@@ -238,20 +244,22 @@ static void SpecialKey( int key, int x, int y )
 }
 
 
-static void Init( GLboolean ciMode )
+static void Init( GLboolean ciMode, const char *filename )
 {
+   static const GLfloat fogColor[4] = {0, 1, 0, 0};
+
    printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
    printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
 
-   Image = LoadRGBImage( IMAGE_FILE, &ImgWidth, &ImgHeight, &ImgFormat );
+   Image = LoadRGBImage( filename, &ImgWidth, &ImgHeight, &ImgFormat );
    if (!Image) {
-      printf("Couldn't read %s\n", IMAGE_FILE);
+      printf("Couldn't read %s\n", filename);
       exit(0);
    }
 
    if (ciMode) {
       /* Convert RGB image to grayscale */
-      GLubyte *indexImage = malloc( ImgWidth * ImgHeight );
+      GLubyte *indexImage = (GLubyte *) malloc( ImgWidth * ImgHeight );
       GLint i;
       for (i=0; i<ImgWidth*ImgHeight; i++) {
          int gray = Image[i*3] + Image[i*3+1] + Image[i*3+2];
@@ -272,6 +280,11 @@ static void Init( GLboolean ciMode )
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glPixelStorei(GL_UNPACK_ROW_LENGTH, ImgWidth);
 
+   glFogi(GL_FOG_MODE, GL_LINEAR);
+   glFogf(GL_FOG_START, 0);
+   glFogf(GL_FOG_END, 2);
+   glFogfv(GL_FOG_COLOR, fogColor);
+
    Reset();
 }
 
@@ -295,6 +308,10 @@ static void Usage(void)
    printf("           r  Decrease GL_UNPACK_SKIP_ROWS*\n");
    printf("           R  Increase GL_UNPACK_SKIP_ROWS*\n");
    printf("           s  Toggle GL_SCISSOR_TEST\n");
+   printf("           F  Toggle GL_FOG\n");
+   printf("           z  Decrease RasterPos Z\n");
+   printf("           Z  Increase RasterPos Z\n");
+   
    printf("           f  Toggle front/back buffer drawing\n");
    printf("           b  Benchmark test\n");
    printf("         ESC  Exit\n");
@@ -306,9 +323,15 @@ static void Usage(void)
 int main( int argc, char *argv[] )
 {
    GLboolean ciMode = GL_FALSE;
+   const char *filename = IMAGE_FILE;
+   int i = 1;
 
-   if (argc > 1 && strcmp(argv[1], "-ci")==0) {
+   if (argc > i && strcmp(argv[i], "-ci")==0) {
       ciMode = GL_TRUE;
+      i++;
+   }
+   if (argc > i) {
+      filename = argv[i];
    }
 
    glutInit( &argc, argv );
@@ -318,11 +341,11 @@ int main( int argc, char *argv[] )
    if (ciMode)
       glutInitDisplayMode( GLUT_INDEX | GLUT_DOUBLE );
    else
-      glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
+      glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE);
 
    glutCreateWindow(argv[0]);
 
-   Init(ciMode);
+   Init(ciMode, filename);
    Usage();
 
    glutReshapeFunc( Reshape );