move osmesa demos to their own directory

4 files changed, 994 insertions, 0 deletions

diff --git a/progs/osdemos/Makefile b/progs/osdemos/Makefile
new file mode 100644
index 0000000000..03ab78ac08
--- /dev/null
+++ b/progs/osdemos/Makefile
@@ -0,0 +1,73 @@
+# progs/demos/Makefile
+
+TOP = ../..
+include $(TOP)/configs/current
+
+INCDIR = $(TOP)/include
+
+OSMESA_LIBS = -L$(LIB_DIR) -lglut -lOSMesa -lGLU -lGL $(APP_LIB_DEPS)
+
+OSMESA16_LIBS = -L$(LIB_DIR) -lglut -lOSMesa16 -lGLU -lGL $(APP_LIB_DEPS)
+
+OSMESA32_LIBS = -L$(LIB_DIR) -lglut -lOSMesa32 -lGLU -lGL $(APP_LIB_DEPS)
+
+LIB_DEP = $(LIB_DIR)/$(GL_LIB_NAME) $(LIB_DIR)/$(GLU_LIB_NAME) $(LIB_DIR)/$(GLUT_LIB_NAME)
+
+PROGS = \
+	osdemo 
+
+
+##### RULES #####
+
+.SUFFIXES:
+.SUFFIXES: .c
+
+
+# make executable from .c file:
+.c: $(LIB_DEP) readtex.o
+	$(CC) -I$(INCDIR) $(CFLAGS) $< readtex.o $(APP_LIB_DEPS) -o $@
+
+
+##### TARGETS #####
+
+default: readtex.o $(PROGS)
+
+
+readtex.c: $(TOP)/progs/util/readtex.c
+	cp $< .
+
+readtex.h: $(TOP)/progs/util/readtex.h
+	cp $< .
+
+readtex.o: readtex.c readtex.h
+	$(CC) -c -I$(INCDIR) $(CFLAGS) readtex.c
+
+
+showbuffer.c: $(TOP)/progs/util/showbuffer.c
+	cp $< .
+
+showbuffer.h: $(TOP)/progs/util/showbuffer.h
+	cp $< .
+
+showbuffer.o: showbuffer.c showbuffer.h
+	$(CC) -c -I$(INCDIR) $(CFLAGS) showbuffer.c
+
+
+# special case: need the -lOSMesa library:
+osdemo: osdemo.c
+	$(CC) -I$(INCDIR) $(CFLAGS) osdemo.c $(OSMESA_LIBS) -o $@
+
+# another special case: need the -lOSMesa16 library:
+osdemo16: osdemo16.c
+	$(CC) -I$(INCDIR) $(CFLAGS) osdemo16.c $(OSMESA16_LIBS) -o $@
+
+# another special case: need the -lOSMesa32 library:
+osdemo32: osdemo32.c
+	$(CC) -I$(INCDIR) $(CFLAGS) osdemo32.c $(OSMESA32_LIBS) -o $@
+
+
+
+clean:
+	-rm -f $(PROGS)
+	-rm -f *.o *~
+	-rm -f readtex.[ch] showbuffer.[ch]
diff --git a/progs/osdemos/osdemo.c b/progs/osdemos/osdemo.c
new file mode 100644
index 0000000000..cdb3c72423
--- /dev/null
+++ b/progs/osdemos/osdemo.c
@@ -0,0 +1,322 @@
+
+/*
+ * Demo of off-screen Mesa rendering
+ *
+ * See Mesa/include/GL/osmesa.h for documentation of the OSMesa functions.
+ *
+ * If you want to render BIG images you'll probably have to increase
+ * MAX_WIDTH and MAX_HEIGHT in src/config.h.
+ *
+ * This program is in the public domain.
+ *
+ * Brian Paul
+ *
+ * PPM output provided by Joerg Schmalzl.
+ * ASCII PPM output added by Brian Paul.
+ *
+ * Usage: osdemo [-perf] [filename]
+ *
+ * -perf: Redraws the image 1000 times, displaying the FPS every 5 secs.
+ * filename: file to store the TGA or PPM output
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "GL/osmesa.h"
+#include "GL/glut.h"
+
+
+#define SAVE_TARGA
+
+
+#define WIDTH 400
+#define HEIGHT 400
+
+static GLint T0 = 0;
+static GLint Frames = 0;
+static int perf = 0;
+
+static void render_image( void )
+{
+   GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
+   GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
+   GLfloat red_mat[]   = { 1.0, 0.2, 0.2, 1.0 };
+   GLfloat green_mat[] = { 0.2, 1.0, 0.2, 1.0 };
+   GLfloat blue_mat[]  = { 0.2, 0.2, 1.0, 1.0 };
+
+
+   glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
+   glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
+   glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
+   glLightfv(GL_LIGHT0, GL_POSITION, light_position);
+    
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-2.5, 2.5, -2.5, 2.5, -10.0, 10.0);
+   glMatrixMode(GL_MODELVIEW);
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef(20.0, 1.0, 0.0, 0.0);
+
+   glPushMatrix();
+   glTranslatef(-0.75, 0.5, 0.0); 
+   glRotatef(90.0, 1.0, 0.0, 0.0);
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red_mat );
+   glutSolidTorus(0.275, 0.85, 20, 20);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(-0.75, -0.5, 0.0); 
+   glRotatef(270.0, 1.0, 0.0, 0.0);
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green_mat );
+   glutSolidCone(1.0, 2.0, 16, 1);
+   glPopMatrix();
+
+#ifdef GL_HP_occlusion_test
+   if (perf == 0) {
+      GLboolean bRet;
+      glDepthMask(GL_FALSE);
+      glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE);
+      glEnable(GL_OCCLUSION_TEST_HP);
+      glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet);
+
+      glPushMatrix();
+      glTranslatef(0.75, 0.0, -1.0);
+      glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat );
+      glutSolidSphere(1.0, 20, 20);
+      glPopMatrix();
+
+      glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet);
+      printf("Occlusion test 1 (result should be 1): %d\n",bRet);
+
+      glDepthMask(GL_TRUE);
+      glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE);
+      glDisable(GL_OCCLUSION_TEST_HP);
+   }
+#endif
+
+   glPushMatrix();
+   glTranslatef(0.75, 0.0, -1.0); 
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat );
+   glutSolidSphere(1.0, 20, 20);
+   glPopMatrix();
+
+#ifdef GL_HP_occlusion_test
+   if (perf == 0){
+      GLboolean bRet;
+
+      glDepthMask(GL_FALSE);
+      glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE);
+      glEnable(GL_OCCLUSION_TEST_HP);
+      glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet);
+
+      /* draw a sphere inside the previous sphere */
+      glPushMatrix();
+      glTranslatef(0.75, 0.0, -1.0);
+      glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat );
+      glutSolidSphere(0.5, 20, 20);
+      glPopMatrix();
+
+      glGetBooleanv(GL_OCCLUSION_TEST_RESULT_HP,&bRet);
+      printf("Occlusion test 2 (result should be 0): %d\n",bRet);
+
+      glDepthMask(GL_TRUE);
+      glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE);
+      glDisable(GL_OCCLUSION_TEST_HP);
+   }
+#endif
+
+   glPopMatrix();
+
+   /* This is very important!!!
+    * Make sure buffered commands are finished!!!
+    */
+   glFinish();
+
+   Frames++;
+   if (perf) {
+     GLint t = glutGet(GLUT_ELAPSED_TIME);
+     if (t - T0 >= 5000) {
+        GLfloat seconds = (t - T0) / 1000.0;
+        GLfloat fps = Frames / seconds;
+        printf("%d frames in %6.3f seconds = %6.3f FPS\n", Frames, seconds, fps);
+        T0 = t;
+        Frames = 0;
+     }
+   }
+}
+
+
+#ifdef SAVE_TARGA
+
+static void
+write_targa(const char *filename, const GLubyte *buffer, int width, int height)
+{
+   FILE *f = fopen( filename, "w" );
+   if (f) {
+      int i, x, y;
+      const GLubyte *ptr = buffer;
+      printf ("osdemo, writing tga file \n");
+      fputc (0x00, f);	/* ID Length, 0 => No ID	*/
+      fputc (0x00, f);	/* Color Map Type, 0 => No color map included	*/
+      fputc (0x02, f);	/* Image Type, 2 => Uncompressed, True-color Image */
+      fputc (0x00, f);	/* Next five bytes are about the color map entries */
+      fputc (0x00, f);	/* 2 bytes Index, 2 bytes length, 1 byte size */
+      fputc (0x00, f);
+      fputc (0x00, f);
+      fputc (0x00, f);
+      fputc (0x00, f);	/* X-origin of Image	*/
+      fputc (0x00, f);
+      fputc (0x00, f);	/* Y-origin of Image	*/
+      fputc (0x00, f);
+      fputc (WIDTH & 0xff, f);      /* Image Width	*/
+      fputc ((WIDTH>>8) & 0xff, f);
+      fputc (HEIGHT & 0xff, f);     /* Image Height	*/
+      fputc ((HEIGHT>>8) & 0xff, f);
+      fputc (0x18, f);		/* Pixel Depth, 0x18 => 24 Bits	*/
+      fputc (0x20, f);		/* Image Descriptor	*/
+      fclose(f);
+      f = fopen( filename, "ab" );  /* reopen in binary append mode */
+      for (y=height-1; y>=0; y--) {
+         for (x=0; x<width; x++) {
+            i = (y*width + x) * 4;
+            fputc(ptr[i+2], f); /* write blue */
+            fputc(ptr[i+1], f); /* write green */
+            fputc(ptr[i], f);   /* write red */
+         }
+      }
+   }
+}
+
+#else
+
+static void
+write_ppm(const char *filename, const GLubyte *buffer, int width, int height)
+{
+   const int binary = 0;
+   FILE *f = fopen( filename, "w" );
+   if (f) {
+      int i, x, y;
+      const GLubyte *ptr = buffer;
+      if (binary) {
+         fprintf(f,"P6\n");
+         fprintf(f,"# ppm-file created by osdemo.c\n");
+         fprintf(f,"%i %i\n", width,height);
+         fprintf(f,"255\n");
+         fclose(f);
+         f = fopen( filename, "ab" );  /* reopen in binary append mode */
+         for (y=height-1; y>=0; y--) {
+            for (x=0; x<width; x++) {
+               i = (y*width + x) * 4;
+               fputc(ptr[i], f);   /* write red */
+               fputc(ptr[i+1], f); /* write green */
+               fputc(ptr[i+2], f); /* write blue */
+            }
+         }
+      }
+      else {
+         /*ASCII*/
+         int counter = 0;
+         fprintf(f,"P3\n");
+         fprintf(f,"# ascii ppm file created by osdemo.c\n");
+         fprintf(f,"%i %i\n", width, height);
+         fprintf(f,"255\n");
+         for (y=height-1; y>=0; y--) {
+            for (x=0; x<width; x++) {
+               i = (y*width + x) * 4;
+               fprintf(f, " %3d %3d %3d", ptr[i], ptr[i+1], ptr[i+2]);
+               counter++;
+               if (counter % 5 == 0)
+                  fprintf(f, "\n");
+            }
+         }
+      }
+      fclose(f);
+   }
+}
+
+#endif
+
+
+
+int main( int argc, char *argv[] )
+{
+   void *buffer;
+   int i;
+   char *filename = NULL;
+
+   /* Create an RGBA-mode context */
+#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
+   /* specify Z, stencil, accum sizes */
+   OSMesaContext ctx = OSMesaCreateContextExt( OSMESA_RGBA, 16, 0, 0, NULL );
+#else
+   OSMesaContext ctx = OSMesaCreateContext( OSMESA_RGBA, NULL );
+#endif
+   if (!ctx) {
+      printf("OSMesaCreateContext failed!\n");
+      return 0;
+   }
+
+   for ( i=1; i<argc; i++ ) {
+      if (argv[i][0] != '-') filename = argv[i];
+      if (strcmp(argv[i], "-perf")==0) perf = 1;
+   }
+
+   /* Allocate the image buffer */
+   buffer = malloc( WIDTH * HEIGHT * 4 * sizeof(GLubyte) );
+   if (!buffer) {
+      printf("Alloc image buffer failed!\n");
+      return 0;
+   }
+
+   /* Bind the buffer to the context and make it current */
+   if (!OSMesaMakeCurrent( ctx, buffer, GL_UNSIGNED_BYTE, WIDTH, HEIGHT )) {
+      printf("OSMesaMakeCurrent failed!\n");
+      return 0;
+   }
+     
+
+   {
+      int z, s, a;
+      glGetIntegerv(GL_DEPTH_BITS, &z);
+      glGetIntegerv(GL_STENCIL_BITS, &s);
+      glGetIntegerv(GL_ACCUM_RED_BITS, &a);
+      printf("Depth=%d Stencil=%d Accum=%d\n", z, s, a);
+   }
+
+   render_image();
+   if (perf)
+      for(i=0; i< 1000; i++)
+         render_image();
+
+   if (filename != NULL) {
+#ifdef SAVE_TARGA
+      write_targa(filename, buffer, WIDTH, HEIGHT);
+#else
+      write_ppm(filename, buffer, WIDTH, HEIGHT);
+#endif
+   }
+   else {
+      printf("Specify a filename if you want to make an image file\n");
+   }
+
+   printf("all done\n");
+
+   /* free the image buffer */
+   free( buffer );
+
+   /* destroy the context */
+   OSMesaDestroyContext( ctx );
+
+   return 0;
+}
diff --git a/progs/osdemos/osdemo16.c b/progs/osdemos/osdemo16.c
new file mode 100644
index 0000000000..10ed695d7a
--- /dev/null
+++ b/progs/osdemos/osdemo16.c
@@ -0,0 +1,291 @@
+/*
+ * Demo of off-screen Mesa rendering with 16-bit color channels.
+ * This requires the libOSMesa16.so library.
+ *
+ * Compile with something like this:
+ *
+ * gcc osdemo16.c -I../../include -L../../lib -lglut -lGLU -lOSMesa16 -lm -o osdemo16
+ */
+
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "GL/osmesa.h"
+#include "GL/glut.h"
+
+
+#define SAVE_TARGA
+
+
+#define WIDTH 400
+#define HEIGHT 400
+
+
+
+static void render_image( void )
+{
+   GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
+   GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
+   GLfloat red_mat[]   = { 1.0, 0.2, 0.2, 1.0 };
+   GLfloat green_mat[] = { 0.2, 1.0, 0.2, 0.5 };
+   GLfloat blue_mat[]  = { 0.2, 0.2, 1.0, 1.0 };
+   GLfloat white_mat[]  = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat purple_mat[] = { 1.0, 0.2, 1.0, 1.0 };
+   GLUquadricObj *qobj = gluNewQuadric();
+
+   glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
+   glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
+   glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
+   glLightfv(GL_LIGHT0, GL_POSITION, light_position);
+    
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-2.5, 2.5, -2.5, 2.5, -10.0, 10.0);
+   glMatrixMode(GL_MODELVIEW);
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef(20.0, 1.0, 0.0, 0.0);
+
+#if 0
+   glPushMatrix();
+   glTranslatef(-0.75, 0.5, 0.0); 
+   glRotatef(90.0, 1.0, 0.0, 0.0);
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red_mat );
+   glutSolidTorus(0.275, 0.85, 20, 20);
+   glPopMatrix();
+#endif
+
+   /* red square */
+   glPushMatrix();
+   glTranslatef(0.0, -0.5, 0.0); 
+   glRotatef(90, 1, 0.5, 0);
+   glScalef(3, 3, 3);
+   glDisable(GL_LIGHTING);
+   glColor4f(1, 0, 0, 0.5);
+   glBegin(GL_POLYGON);
+   glVertex2f(-1, -1);
+   glVertex2f( 1, -1);
+   glVertex2f( 1,  1);
+   glVertex2f(-1,  1);
+   glEnd();
+   glEnable(GL_LIGHTING);
+   glPopMatrix();
+
+#if 0
+   /* green square */
+   glPushMatrix();
+   glTranslatef(0.0, 0.5, 0.1); 
+   glDisable(GL_LIGHTING);
+   glColor3f(0, 1, 0);
+   glBegin(GL_POLYGON);
+   glVertex2f(-1, -1);
+   glVertex2f( 1, -1);
+   glVertex2f( 1,  1);
+   glVertex2f(-1,  1);
+   glEnd();
+   glEnable(GL_LIGHTING);
+   glPopMatrix();
+
+   /* blue square */
+   glPushMatrix();
+   glTranslatef(0.75, 0.5, 0.3); 
+   glDisable(GL_LIGHTING);
+   glColor3f(0, 0, 0.5);
+   glBegin(GL_POLYGON);
+   glVertex2f(-1, -1);
+   glVertex2f( 1, -1);
+   glVertex2f( 1,  1);
+   glVertex2f(-1,  1);
+   glEnd();
+   glEnable(GL_LIGHTING);
+   glPopMatrix();
+#endif
+   glPushMatrix();
+   glTranslatef(-0.75, -0.5, 0.0); 
+   glRotatef(270.0, 1.0, 0.0, 0.0);
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green_mat );
+   glColor4f(0,1,0,0.5);
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+   gluCylinder(qobj, 1.0, 0.0, 2.0, 16, 1);
+   glDisable(GL_BLEND);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(0.75, 1.0, 1.0); 
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat );
+   gluSphere(qobj, 1.0, 20, 20);
+   glPopMatrix();
+
+   glPopMatrix();
+
+   /* This is very important!!!
+    * Make sure buffered commands are finished!!!
+    */
+   glFinish();
+
+   gluDeleteQuadric(qobj);
+
+   {
+      GLint r, g, b, a;
+      glGetIntegerv(GL_RED_BITS, &r);
+      glGetIntegerv(GL_GREEN_BITS, &g);
+      glGetIntegerv(GL_BLUE_BITS, &b);
+      glGetIntegerv(GL_ALPHA_BITS, &a);
+      printf("channel sizes: %d %d %d %d\n", r, g, b, a);
+   }
+}
+
+
+
+static void
+write_targa(const char *filename, const GLushort *buffer, int width, int height)
+{
+   FILE *f = fopen( filename, "w" );
+   if (f) {
+      int i, x, y;
+      const GLushort *ptr = buffer;
+      printf ("osdemo, writing tga file \n");
+      fputc (0x00, f);	/* ID Length, 0 => No ID	*/
+      fputc (0x00, f);	/* Color Map Type, 0 => No color map included	*/
+      fputc (0x02, f);	/* Image Type, 2 => Uncompressed, True-color Image */
+      fputc (0x00, f);	/* Next five bytes are about the color map entries */
+      fputc (0x00, f);	/* 2 bytes Index, 2 bytes length, 1 byte size */
+      fputc (0x00, f);
+      fputc (0x00, f);
+      fputc (0x00, f);
+      fputc (0x00, f);	/* X-origin of Image	*/
+      fputc (0x00, f);
+      fputc (0x00, f);	/* Y-origin of Image	*/
+      fputc (0x00, f);
+      fputc (WIDTH & 0xff, f);      /* Image Width	*/
+      fputc ((WIDTH>>8) & 0xff, f);
+      fputc (HEIGHT & 0xff, f);     /* Image Height	*/
+      fputc ((HEIGHT>>8) & 0xff, f);
+      fputc (0x18, f);		/* Pixel Depth, 0x18 => 24 Bits	*/
+      fputc (0x20, f);		/* Image Descriptor	*/
+      fclose(f);
+      f = fopen( filename, "ab" );  /* reopen in binary append mode */
+      for (y=height-1; y>=0; y--) {
+         for (x=0; x<width; x++) {
+            i = (y*width + x) * 4;
+            /* just write 8 high bits */
+            fputc(ptr[i+2] >> 8, f); /* write blue */
+            fputc(ptr[i+1] >> 8, f); /* write green */
+            fputc(ptr[i] >> 8, f);   /* write red */
+         }
+      }
+   }
+}
+
+
+static void
+write_ppm(const char *filename, const GLushort *buffer, int width, int height)
+{
+   const int binary = 0;
+   FILE *f = fopen( filename, "w" );
+   if (f) {
+      int i, x, y;
+      const GLushort *ptr = buffer;
+      if (binary) {
+         fprintf(f,"P6\n");
+         fprintf(f,"# ppm-file created by osdemo.c\n");
+         fprintf(f,"%i %i\n", width,height);
+         fprintf(f,"255\n");
+         fclose(f);
+         f = fopen( filename, "ab" );  /* reopen in binary append mode */
+         for (y=height-1; y>=0; y--) {
+            for (x=0; x<width; x++) {
+               i = (y*width + x) * 4;
+               /* just write 8 high bits */
+               fputc(ptr[i] >> 8, f);   /* write red */
+               fputc(ptr[i+1] >> 8, f); /* write green */
+               fputc(ptr[i+2] >> 8, f); /* write blue */
+            }
+         }
+      }
+      else {
+         /*ASCII*/
+         int counter = 0;
+         fprintf(f,"P3\n");
+         fprintf(f,"# ascii ppm file created by osdemo.c\n");
+         fprintf(f,"%i %i\n", width, height);
+         fprintf(f,"255\n");
+         for (y=height-1; y>=0; y--) {
+            for (x=0; x<width; x++) {
+               i = (y*width + x) * 4;
+               /* just write 8 high bits */
+               fprintf(f, " %3d %3d %3d", ptr[i] >> 8, ptr[i+1] >> 8, ptr[i+2] >> 8);
+               counter++;
+               if (counter % 5 == 0)
+                  fprintf(f, "\n");
+            }
+         }
+      }
+      fclose(f);
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   GLushort *buffer;
+
+   /* Create an RGBA-mode context */
+#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
+   /* specify Z, stencil, accum sizes */
+   OSMesaContext ctx = OSMesaCreateContextExt( GL_RGBA, 16, 0, 0, NULL );
+#else
+   OSMesaContext ctx = OSMesaCreateContext( GL_RGBA, NULL );
+#endif
+   if (!ctx) {
+      printf("OSMesaCreateContext failed!\n");
+      return 0;
+   }
+
+   /* Allocate the image buffer */
+   buffer = (GLushort *) malloc( WIDTH * HEIGHT * 4 * sizeof(GLushort));
+   if (!buffer) {
+      printf("Alloc image buffer failed!\n");
+      return 0;
+   }
+
+   /* Bind the buffer to the context and make it current */
+   if (!OSMesaMakeCurrent( ctx, buffer, GL_UNSIGNED_SHORT, WIDTH, HEIGHT )) {
+      printf("OSMesaMakeCurrent failed!\n");
+      return 0;
+   }
+     
+   render_image();
+
+   if (argc>1) {
+#ifdef SAVE_TARGA
+      write_targa(argv[1], buffer, WIDTH, HEIGHT);
+#else
+      write_ppm(argv[1], buffer, WIDTH, HEIGHT);
+#endif
+   }
+   else {
+      printf("Specify a filename if you want to make an image file\n");
+   }
+
+   printf("all done\n");
+
+   /* free the image buffer */
+   free( buffer );
+
+   /* destroy the context */
+   OSMesaDestroyContext( ctx );
+
+   return 0;
+}
diff --git a/progs/osdemos/osdemo32.c b/progs/osdemos/osdemo32.c
new file mode 100644
index 0000000000..7295b46a83
--- /dev/null
+++ b/progs/osdemos/osdemo32.c
@@ -0,0 +1,308 @@
+/*
+ * Demo of off-screen Mesa rendering with 32-bit float color channels.
+ * This requires the libOSMesa32.so library.
+ *
+ * Compile with something like this:
+ *
+ * gcc osdemo32.c -I../../include -L../../lib -lglut -lGLU -lOSMesa32 -lm -o osdemo32
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "GL/osmesa.h"
+#include "GL/glut.h"
+
+
+#define SAVE_TARGA
+
+
+#define WIDTH 400
+#define HEIGHT 400
+
+
+
+static void render_image( void )
+{
+   GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
+   GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
+   GLfloat red_mat[]   = { 1.0, 0.2, 0.2, 1.0 };
+   GLfloat green_mat[] = { 0.2, 1.0, 0.2, 0.5 };
+   GLfloat blue_mat[]  = { 0.2, 0.2, 1.0, 1.0 };
+   GLfloat white_mat[]  = { 1.0, 1.0, 1.0, 1.0 };
+   GLfloat purple_mat[] = { 1.0, 0.2, 1.0, 1.0 };
+   GLUquadricObj *qobj = gluNewQuadric();
+
+   glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
+   glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
+   glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
+   glLightfv(GL_LIGHT0, GL_POSITION, light_position);
+    
+   glEnable(GL_LIGHTING);
+   glEnable(GL_LIGHT0);
+   glEnable(GL_DEPTH_TEST);
+
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-2.5, 2.5, -2.5, 2.5, -10.0, 10.0);
+   glMatrixMode(GL_MODELVIEW);
+
+   glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+   glPushMatrix();
+   glRotatef(20.0, 1.0, 0.0, 0.0);
+
+#if 0
+   glPushMatrix();
+   glTranslatef(-0.75, 0.5, 0.0); 
+   glRotatef(90.0, 1.0, 0.0, 0.0);
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, red_mat );
+   glutSolidTorus(0.275, 0.85, 20, 20);
+   glPopMatrix();
+#endif
+
+   /* red square */
+   glPushMatrix();
+   glTranslatef(0.0, -0.5, 0.0); 
+   glRotatef(90, 1, 0.5, 0);
+   glScalef(3, 3, 3);
+   glDisable(GL_LIGHTING);
+   glColor4f(1, 0, 0, 0.5);
+   glBegin(GL_POLYGON);
+   glVertex2f(-1, -1);
+   glVertex2f( 1, -1);
+   glVertex2f( 1,  1);
+   glVertex2f(-1,  1);
+   glEnd();
+   glEnable(GL_LIGHTING);
+   glPopMatrix();
+
+#if 0
+   /* green square */
+   glPushMatrix();
+   glTranslatef(0.0, 0.5, 0.1); 
+   glDisable(GL_LIGHTING);
+   glColor3f(0, 1, 0);
+   glBegin(GL_POLYGON);
+   glVertex2f(-1, -1);
+   glVertex2f( 1, -1);
+   glVertex2f( 1,  1);
+   glVertex2f(-1,  1);
+   glEnd();
+   glEnable(GL_LIGHTING);
+   glPopMatrix();
+
+   /* blue square */
+   glPushMatrix();
+   glTranslatef(0.75, 0.5, 0.3); 
+   glDisable(GL_LIGHTING);
+   glColor3f(0, 0, 0.5);
+   glBegin(GL_POLYGON);
+   glVertex2f(-1, -1);
+   glVertex2f( 1, -1);
+   glVertex2f( 1,  1);
+   glVertex2f(-1,  1);
+   glEnd();
+   glEnable(GL_LIGHTING);
+   glPopMatrix();
+#endif
+   glPushMatrix();
+   glTranslatef(-0.75, -0.5, 0.0); 
+   glRotatef(270.0, 1.0, 0.0, 0.0);
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, green_mat );
+   glColor4f(0,1,0,0.5);
+   glEnable(GL_BLEND);
+   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+   gluCylinder(qobj, 1.0, 0.0, 2.0, 16, 1);
+   glDisable(GL_BLEND);
+   glPopMatrix();
+
+   glPushMatrix();
+   glTranslatef(0.75, 1.0, 1.0); 
+   glMaterialfv( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, blue_mat );
+   gluSphere(qobj, 1.0, 20, 20);
+   glPopMatrix();
+
+   glPopMatrix();
+
+   /* This is very important!!!
+    * Make sure buffered commands are finished!!!
+    */
+   glFinish();
+
+   gluDeleteQuadric(qobj);
+
+   {
+      GLint r, g, b, a;
+      glGetIntegerv(GL_RED_BITS, &r);
+      glGetIntegerv(GL_GREEN_BITS, &g);
+      glGetIntegerv(GL_BLUE_BITS, &b);
+      glGetIntegerv(GL_ALPHA_BITS, &a);
+      printf("channel sizes: %d %d %d %d\n", r, g, b, a);
+   }
+}
+
+
+
+static void
+write_targa(const char *filename, const GLfloat *buffer, int width, int height)
+{
+   FILE *f = fopen( filename, "w" );
+   if (f) {
+      int i, x, y;
+      const GLfloat *ptr = buffer;
+      printf ("osdemo, writing tga file \n");
+      fputc (0x00, f);	/* ID Length, 0 => No ID	*/
+      fputc (0x00, f);	/* Color Map Type, 0 => No color map included	*/
+      fputc (0x02, f);	/* Image Type, 2 => Uncompressed, True-color Image */
+      fputc (0x00, f);	/* Next five bytes are about the color map entries */
+      fputc (0x00, f);	/* 2 bytes Index, 2 bytes length, 1 byte size */
+      fputc (0x00, f);
+      fputc (0x00, f);
+      fputc (0x00, f);
+      fputc (0x00, f);	/* X-origin of Image	*/
+      fputc (0x00, f);
+      fputc (0x00, f);	/* Y-origin of Image	*/
+      fputc (0x00, f);
+      fputc (WIDTH & 0xff, f);      /* Image Width	*/
+      fputc ((WIDTH>>8) & 0xff, f);
+      fputc (HEIGHT & 0xff, f);     /* Image Height	*/
+      fputc ((HEIGHT>>8) & 0xff, f);
+      fputc (0x18, f);		/* Pixel Depth, 0x18 => 24 Bits	*/
+      fputc (0x20, f);		/* Image Descriptor	*/
+      fclose(f);
+      f = fopen( filename, "ab" );  /* reopen in binary append mode */
+      for (y=height-1; y>=0; y--) {
+         for (x=0; x<width; x++) {
+            int r, g, b;
+            i = (y*width + x) * 4;
+            r = (int) (ptr[i+0] * 255.0);
+            g = (int) (ptr[i+1] * 255.0);
+            b = (int) (ptr[i+2] * 255.0);
+            if (r > 255) r = 255;
+            if (g > 255) g = 255;
+            if (b > 255) b = 255;
+            fputc(b, f); /* write blue */
+            fputc(g, f); /* write green */
+            fputc(r, f); /* write red */
+         }
+      }
+   }
+}
+
+
+static void
+write_ppm(const char *filename, const GLfloat *buffer, int width, int height)
+{
+   const int binary = 0;
+   FILE *f = fopen( filename, "w" );
+   if (f) {
+      int i, x, y;
+      const GLfloat *ptr = buffer;
+      if (binary) {
+         fprintf(f,"P6\n");
+         fprintf(f,"# ppm-file created by osdemo.c\n");
+         fprintf(f,"%i %i\n", width,height);
+         fprintf(f,"255\n");
+         fclose(f);
+         f = fopen( filename, "ab" );  /* reopen in binary append mode */
+         for (y=height-1; y>=0; y--) {
+            for (x=0; x<width; x++) {
+               int r, g, b;
+               i = (y*width + x) * 4;
+               r = (int) (ptr[i+0] * 255.0);
+               g = (int) (ptr[i+1] * 255.0);
+               b = (int) (ptr[i+2] * 255.0);
+               if (r > 255) r = 255;
+               if (g > 255) g = 255;
+               if (b > 255) b = 255;
+               fputc(r, f);   /* write red */
+               fputc(g, f); /* write green */
+               fputc(b, f); /* write blue */
+            }
+         }
+      }
+      else {
+         /*ASCII*/
+         int counter = 0;
+         fprintf(f,"P3\n");
+         fprintf(f,"# ascii ppm file created by osdemo.c\n");
+         fprintf(f,"%i %i\n", width, height);
+         fprintf(f,"255\n");
+         for (y=height-1; y>=0; y--) {
+            for (x=0; x<width; x++) {
+               int r, g, b;
+               i = (y*width + x) * 4;
+               r = (int) (ptr[i+0] * 255.0);
+               g = (int) (ptr[i+1] * 255.0);
+               b = (int) (ptr[i+2] * 255.0);
+               if (r > 255) r = 255;
+               if (g > 255) g = 255;
+               if (b > 255) b = 255;
+               fprintf(f, " %3d %3d %3d", r, g, b);
+               counter++;
+               if (counter % 5 == 0)
+                  fprintf(f, "\n");
+            }
+         }
+      }
+      fclose(f);
+   }
+}
+
+
+
+int main( int argc, char *argv[] )
+{
+   GLfloat *buffer;
+
+   /* Create an RGBA-mode context */
+#if OSMESA_MAJOR_VERSION * 100 + OSMESA_MINOR_VERSION >= 305
+   /* specify Z, stencil, accum sizes */
+   OSMesaContext ctx = OSMesaCreateContextExt( GL_RGBA, 16, 0, 0, NULL );
+#else
+   OSMesaContext ctx = OSMesaCreateContext( GL_RGBA, NULL );
+#endif
+   if (!ctx) {
+      printf("OSMesaCreateContext failed!\n");
+      return 0;
+   }
+
+   /* Allocate the image buffer */
+   buffer = (GLfloat *) malloc( WIDTH * HEIGHT * 4 * sizeof(GLfloat));
+   if (!buffer) {
+      printf("Alloc image buffer failed!\n");
+      return 0;
+   }
+
+   /* Bind the buffer to the context and make it current */
+   if (!OSMesaMakeCurrent( ctx, buffer, GL_FLOAT, WIDTH, HEIGHT )) {
+      printf("OSMesaMakeCurrent failed!\n");
+      return 0;
+   }
+     
+   render_image();
+
+   if (argc>1) {
+#ifdef SAVE_TARGA
+      write_targa(argv[1], buffer, WIDTH, HEIGHT);
+#else
+      write_ppm(argv[1], buffer, WIDTH, HEIGHT);
+#endif
+   }
+   else {
+      printf("Specify a filename if you want to make an image file\n");
+   }
+
+   printf("all done\n");
+
+   /* free the image buffer */
+   free( buffer );
+
+   /* destroy the context */
+   OSMesaDestroyContext( ctx );
+
+   return 0;
+}