progs/windml/ugldrawpix.c - third_party/mesa - Git at Google

 /*
  * glDrawPixels demo/test/benchmark
  *
  * Brian Paul   September 25, 1997  This file is in the public domain.
  *
  * Conversion to UGL/Mesa by Stephane Raimbault july, 2001
  */

 /*
  * Revision 1.2  2001/09/10 19:21:13  brianp
  * WindML updates (Stephane Raimbault)
  *
  * Revision 1.1  2001/08/20 16:07:11  brianp
  * WindML driver (Stephane Raimbault)
  *
  * Revision 1.5  2000/12/24 22:53:54  pesco
  * * demos/Makefile.am (INCLUDES): Added -I$(top_srcdir)/util.
  * * demos/Makefile.X11, demos/Makefile.BeOS-R4, demos/Makefile.cygnus:
  * Essentially the same.
  * Program files updated to include "readtex.c", not "../util/readtex.c".
  * * demos/reflect.c: Likewise for "showbuffer.c".
  *
  *
  * * Makefile.am (EXTRA_DIST): Added top-level regular files.
  *
  * * include/GL/Makefile.am (INC_X11): Added glxext.h.
  *
  *
  * * src/GGI/include/ggi/mesa/Makefile.am (EXTRA_HEADERS): Include
  * Mesa GGI headers in dist even if HAVE_GGI is not given.
  *
  * * configure.in: Look for GLUT and demo source dirs in $srcdir.
  *
  * * src/swrast/Makefile.am (libMesaSwrast_la_SOURCES): Set to *.[ch].
  * More source list updates in various Makefile.am's.
  *
  * * Makefile.am (dist-hook): Remove CVS directory from distribution.
  * (DIST_SUBDIRS): List all possible subdirs here.
  * (SUBDIRS): Only list subdirs selected for build again.
  * The above two applied to all subdir Makefile.am's also.
  *
  * Revision 1.4  2000/09/08 21:45:21  brianp
  * added dither key option
  *
  * 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 <tickLib.h>

 #include <ugl/ugl.h>
 #include <ugl/uglucode.h>
 #include <ugl/uglevent.h>
 #include <ugl/uglinput.h>

 #include <GL/uglmesa.h>
 #include <GL/glu.h>

 #include "../util/readtex.h"

 #define IMAGE_FILE "Mesa/images/wrs_logo.rgb"

 UGL_LOCAL UGL_EVENT_SERVICE_ID eventServiceId;
 UGL_LOCAL UGL_EVENT_Q_ID qId;
 UGL_LOCAL volatile UGL_BOOL stopWex;
 UGL_LOCAL UGL_MESA_CONTEXT umc;

 UGL_LOCAL int ImgWidth, ImgHeight;
 UGL_LOCAL GLenum ImgFormat;
 UGL_LOCAL GLubyte *Image;

 UGL_LOCAL int Xpos, Ypos;
 UGL_LOCAL int SkipPixels, SkipRows;
 UGL_LOCAL int DrawWidth, DrawHeight;
 UGL_LOCAL float Xzoom, Yzoom;
 UGL_LOCAL GLboolean Scissor;
 UGL_LOCAL GLboolean DrawFront;
 UGL_LOCAL GLboolean Dither;

 UGL_LOCAL void cleanUp (void);

 UGL_LOCAL void reset(void)
     {
     Xpos = Ypos = 20;
     DrawWidth = ImgWidth;
     DrawHeight = ImgHeight;
     SkipPixels = SkipRows = 0;
     Scissor = GL_FALSE;
     Xzoom = Yzoom = 1.0;
     }

 UGL_LOCAL void initGL(GLboolean ciMode, GLsizei width, GLsizei height)
     {
     printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
     printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
     printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));

     Image = LoadRGBImage(IMAGE_FILE, &ImgWidth, &ImgHeight, &ImgFormat);
     if (!Image)
 	{
 	printf("Couldn't read %s\n", IMAGE_FILE);
 	cleanUp();
 	exit(1);
 	}

     glScissor(width/4, height/4, width/2, height/2);

     if (ciMode)
 	{
 	/* Convert RGB image to grayscale */
 	GLubyte *indexImage = 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];
 	    indexImage[i] = gray / 3;
 	    }
 	free(Image);
 	Image = indexImage;
 	ImgFormat = GL_COLOR_INDEX;

 	for (i=0;i<255;i++)
 	    {
 	    float g = i / 255.0;
 	    uglMesaSetColor(i, g, g, g);
 	    }
 	}

     printf("Loaded %d by %d image\n", ImgWidth, ImgHeight );

     glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
     glPixelStorei(GL_UNPACK_ROW_LENGTH, ImgWidth);

     reset();

     glViewport( 0, 0, width, height );
     glMatrixMode( GL_PROJECTION );
     glLoadIdentity();
     glOrtho( 0.0, width, 0.0, height, -1.0, 1.0 );
     glMatrixMode( GL_MODELVIEW );
     glLoadIdentity();
     }

 UGL_LOCAL void drawGL(void)
     {
     glClear(GL_COLOR_BUFFER_BIT);

     /* This allows negative raster positions: */
     glRasterPos2i(0, 0);
     glBitmap(0, 0, 0, 0, Xpos, Ypos, NULL);

     glPixelStorei(GL_UNPACK_SKIP_PIXELS, SkipPixels);
     glPixelStorei(GL_UNPACK_SKIP_ROWS, SkipRows);

     glPixelZoom( Xzoom, Yzoom );

     if (Scissor)
 	    glEnable(GL_SCISSOR_TEST);

     glDrawPixels(DrawWidth, DrawHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);

     glDisable(GL_SCISSOR_TEST);

     uglMesaSwapBuffers();
     }


 UGL_LOCAL void benchmark( void )
     {
     int startTick, endTick, ticksBySec;
     int draws;
     double seconds, pixelsPerSecond;

     printf("Benchmarking (4 sec)...\n");

     /* GL set-up */
     glPixelStorei(GL_UNPACK_SKIP_PIXELS, SkipPixels);
     glPixelStorei(GL_UNPACK_SKIP_ROWS, SkipRows);
     glPixelZoom( Xzoom, Yzoom );
     if (Scissor)
 	    glEnable(GL_SCISSOR_TEST);

     if (DrawFront)
 	    glDrawBuffer(GL_FRONT);
     else
 	    glDrawBuffer(GL_BACK);

     /* Run timing test */
     draws = 0;

     ticksBySec = sysClkRateGet ();
     startTick = tickGet();

     do {
        glDrawPixels(DrawWidth, DrawHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
        draws++;
        endTick = tickGet ();
     } while ((endTick - startTick)/ticksBySec < 4);   /* 4 seconds */

     /* GL clean-up */
     glDisable(GL_SCISSOR_TEST);

     /* Results */
     seconds = (endTick - startTick)/ticksBySec;
     pixelsPerSecond = draws * DrawWidth * DrawHeight / seconds;
     printf("Result: %d draws in %f seconds = %f pixels/sec\n",
 	   draws, seconds, pixelsPerSecond);
     }

 UGL_LOCAL void echoUse(void)
     {
     printf("Keys:\n");
     printf("       SPACE  Reset Parameters\n");
     printf("     Up/Down  Move image up/down\n");
     printf("  Left/Right  Move image left/right\n");
     printf("           x  Decrease X-axis PixelZoom\n");
     printf("           X  Increase X-axis PixelZoom\n");
     printf("           y  Decrease Y-axis PixelZoom\n");
     printf("           Y  Increase Y-axis PixelZoom\n");
     printf("           w  Decrease glDrawPixels width*\n");
     printf("           W  Increase glDrawPixels width*\n");
     printf("           h  Decrease glDrawPixels height*\n");
     printf("           H  Increase glDrawPixels height*\n");
     printf("           p  Decrease GL_UNPACK_SKIP_PIXELS*\n");
     printf("           P  Increase GL_UNPACK_SKIP_PIXELS*\n");
     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 front/back buffer drawing\n");
     printf("           d  Toggle dithering\n");
     printf("           b  Benchmark test\n");
     printf("         ESC  Exit\n");
     printf("* Warning: no limits are imposed on these parameters so it's\n");
     printf("  possible to cause a segfault if you go too far.\n");
     }


 UGL_LOCAL void readKey(UGL_WCHAR key)
     {
     switch (key)
 	{
 	case UGL_UNI_SPACE:
 	    reset();
 	    break;
 	case 'd':
 	    Dither = !Dither;
 	    if (Dither)
 		glEnable(GL_DITHER);
 	    else
 		glDisable(GL_DITHER);
 	    break;
 	case 'w':
 	    if (DrawWidth > 0)
 		DrawWidth--;
 	    break;
 	case 'W':
 	    DrawWidth++;
 	    break;
 	case 'h':
 	    if (DrawHeight > 0)
 		DrawHeight--;
 	    break;
 	case 'H':
 	    DrawHeight++;
 	    break;
 	case 'p':
 	    if (SkipPixels > 0)
 		SkipPixels--;
 	    break;
 	case 'P':
 	    SkipPixels++;
 	    break;
 	case 'r':
 	    if (SkipRows > 0)
 		SkipRows--;
 	    break;
 	case 'R':
 	    SkipRows++;
 	    break;
 	case 's':
 	    Scissor = !Scissor;
 	    break;
 	case 'x':
 	    Xzoom -= 0.1;
 	    break;
 	case 'X':
 	    Xzoom += 0.1;
 	    break;
 	case 'y':
 	    Yzoom -= 0.1;
 	    break;
 	case 'Y':
 	    Yzoom += 0.1;
 	    break;
 	case 'b':
 	    benchmark();
 	    break;
 	case 'f':
 	    DrawFront = !DrawFront;
 	    if (DrawFront)
 		glDrawBuffer(GL_FRONT);
 	    else
 		glDrawBuffer(GL_BACK);
 	    printf("glDrawBuffer(%s)\n", DrawFront ? "GL_FRONT" : "GL_BACK");
 	    break;
 	case UGL_UNI_UP_ARROW:
 	    Ypos += 1;
 	    break;
 	case UGL_UNI_DOWN_ARROW:
 	    Ypos -= 1;
 	    break;
 	case UGL_UNI_LEFT_ARROW:
 	    Xpos -= 1;
 	    break;
 	case UGL_UNI_RIGHT_ARROW:
 	    Xpos += 1;
 	    break;
 	case UGL_UNI_ESCAPE:
 	    stopWex = UGL_TRUE;
 	    break;
 	}
     }

 UGL_LOCAL void loopEvent(void)
     {
     UGL_EVENT event;
     UGL_INPUT_EVENT * pInputEvent;

     UGL_FOREVER
 	{
 	if (uglEventGet (qId, &event, sizeof (event), UGL_NO_WAIT)
 	    != UGL_STATUS_Q_EMPTY)
             {
 	    pInputEvent = (UGL_INPUT_EVENT *)&event;

 	    if (pInputEvent->header.type == UGL_EVENT_TYPE_KEYBOARD &&
 		pInputEvent->modifiers & UGL_KEYBOARD_KEYDOWN)
 		readKey(pInputEvent->type.keyboard.key);
 	    }

 	drawGL();
 	if (stopWex)
             break;
 	}
     }

 UGL_LOCAL void cleanUp (void)
     {
     uglEventQDestroy (eventServiceId, qId);

     uglMesaDestroyContext();
     uglDeinitialize ();
     }

 void windMLDrawPix (UGL_BOOL windMLMode);

 void ugldrawpix (void)
     {
     taskSpawn ("tDrawPix", 210, VX_FP_TASK, 100000, (FUNCPTR)windMLDrawPix,
 	       UGL_FALSE,1,2,3,4,5,6,7,8,9);
     }

 void windMLDrawPix (UGL_BOOL windMLMode)
     {
     UGL_INPUT_DEVICE_ID keyboardDevId;
     GLuint ciMode;
     GLsizei width, height;

     Image = NULL;
     Scissor = GL_FALSE;
     DrawFront = GL_FALSE;
     Dither = GL_TRUE;

     uglInitialize ();

     uglDriverFind (UGL_KEYBOARD_TYPE, 0,
 		   (UGL_UINT32 *)&keyboardDevId);

     uglDriverFind (UGL_EVENT_SERVICE_TYPE, 0, (UGL_UINT32 *)&eventServiceId);

     qId = uglEventQCreate (eventServiceId, 100);

     /* Double buffering */
     if (windMLMode)
        umc = uglMesaCreateNewContext(UGL_MESA_DOUBLE
 				     | UGL_MESA_WINDML_EXCLUSIVE, NULL);
     else
        umc = uglMesaCreateNewContext(UGL_MESA_DOUBLE, NULL);

     if (umc == NULL)
         {
 	uglDeinitialize ();
 	return;
 	}

     uglMesaMakeCurrentContext(umc, 0, 0, UGL_MESA_FULLSCREEN_WIDTH,
 			      UGL_MESA_FULLSCREEN_HEIGHT);

     uglMesaGetIntegerv(UGL_MESA_COLOR_INDEXED, &ciMode);
     uglMesaGetIntegerv(UGL_MESA_WIDTH, &width);
     uglMesaGetIntegerv(UGL_MESA_HEIGHT, &height);

     initGL(ciMode, width, height);

     echoUse();

     stopWex = UGL_FALSE;
     loopEvent();

     cleanUp();
     free(Image);

     return;
     }
	/*
	* glDrawPixels demo/test/benchmark
	*
	* Brian Paul September 25, 1997 This file is in the public domain.
	*
	* Conversion to UGL/Mesa by Stephane Raimbault july, 2001
	*/

	/*
	* Revision 1.2 2001/09/10 19:21:13 brianp
	* WindML updates (Stephane Raimbault)
	*
	* Revision 1.1 2001/08/20 16:07:11 brianp
	* WindML driver (Stephane Raimbault)
	*
	* Revision 1.5 2000/12/24 22:53:54 pesco
	* * demos/Makefile.am (INCLUDES): Added -I$(top_srcdir)/util.
	* * demos/Makefile.X11, demos/Makefile.BeOS-R4, demos/Makefile.cygnus:
	* Essentially the same.
	* Program files updated to include "readtex.c", not "../util/readtex.c".
	* * demos/reflect.c: Likewise for "showbuffer.c".
	*
	*
	* * Makefile.am (EXTRA_DIST): Added top-level regular files.
	*
	* * include/GL/Makefile.am (INC_X11): Added glxext.h.
	*
	*
	* * src/GGI/include/ggi/mesa/Makefile.am (EXTRA_HEADERS): Include
	* Mesa GGI headers in dist even if HAVE_GGI is not given.
	*
	* * configure.in: Look for GLUT and demo source dirs in $srcdir.
	*
	* * src/swrast/Makefile.am (libMesaSwrast_la_SOURCES): Set to *.[ch].
	* More source list updates in various Makefile.am's.
	*
	* * Makefile.am (dist-hook): Remove CVS directory from distribution.
	* (DIST_SUBDIRS): List all possible subdirs here.
	* (SUBDIRS): Only list subdirs selected for build again.
	* The above two applied to all subdir Makefile.am's also.
	*
	* Revision 1.4 2000/09/08 21:45:21 brianp
	* added dither key option
	*
	* 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 <tickLib.h>

	#include <ugl/ugl.h>
	#include <ugl/uglucode.h>
	#include <ugl/uglevent.h>
	#include <ugl/uglinput.h>

	#include <GL/uglmesa.h>
	#include <GL/glu.h>

	#include "../util/readtex.h"

	#define IMAGE_FILE "Mesa/images/wrs_logo.rgb"

	UGL_LOCAL UGL_EVENT_SERVICE_ID eventServiceId;
	UGL_LOCAL UGL_EVENT_Q_ID qId;
	UGL_LOCAL volatile UGL_BOOL stopWex;
	UGL_LOCAL UGL_MESA_CONTEXT umc;

	UGL_LOCAL int ImgWidth, ImgHeight;
	UGL_LOCAL GLenum ImgFormat;
	UGL_LOCAL GLubyte *Image;

	UGL_LOCAL int Xpos, Ypos;
	UGL_LOCAL int SkipPixels, SkipRows;
	UGL_LOCAL int DrawWidth, DrawHeight;
	UGL_LOCAL float Xzoom, Yzoom;
	UGL_LOCAL GLboolean Scissor;
	UGL_LOCAL GLboolean DrawFront;
	UGL_LOCAL GLboolean Dither;

	UGL_LOCAL void cleanUp (void);

	UGL_LOCAL void reset(void)
	{
	Xpos = Ypos = 20;
	DrawWidth = ImgWidth;
	DrawHeight = ImgHeight;
	SkipPixels = SkipRows = 0;
	Scissor = GL_FALSE;
	Xzoom = Yzoom = 1.0;
	}

	UGL_LOCAL void initGL(GLboolean ciMode, GLsizei width, GLsizei height)
	{
	printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
	printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
	printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));

	Image = LoadRGBImage(IMAGE_FILE, &ImgWidth, &ImgHeight, &ImgFormat);
	if (!Image)
	{
	printf("Couldn't read %s\n", IMAGE_FILE);
	cleanUp();
	exit(1);
	}

	glScissor(width/4, height/4, width/2, height/2);

	if (ciMode)
	{
	/* Convert RGB image to grayscale */
	GLubyte indexImage = malloc( ImgWidth ImgHeight );
	GLint i;
	for (i=0; i<ImgWidth*ImgHeight; i++)
	{
	int gray = Image[i3] + Image[i3+1] + Image[i*3+2];
	indexImage[i] = gray / 3;
	}
	free(Image);
	Image = indexImage;
	ImgFormat = GL_COLOR_INDEX;

	for (i=0;i<255;i++)
	{
	float g = i / 255.0;
	uglMesaSetColor(i, g, g, g);
	}
	}

	printf("Loaded %d by %d image\n", ImgWidth, ImgHeight );

	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glPixelStorei(GL_UNPACK_ROW_LENGTH, ImgWidth);

	reset();

	glViewport( 0, 0, width, height );
	glMatrixMode( GL_PROJECTION );
	glLoadIdentity();
	glOrtho( 0.0, width, 0.0, height, -1.0, 1.0 );
	glMatrixMode( GL_MODELVIEW );
	glLoadIdentity();
	}

	UGL_LOCAL void drawGL(void)
	{
	glClear(GL_COLOR_BUFFER_BIT);

	/* This allows negative raster positions: */
	glRasterPos2i(0, 0);
	glBitmap(0, 0, 0, 0, Xpos, Ypos, NULL);

	glPixelStorei(GL_UNPACK_SKIP_PIXELS, SkipPixels);
	glPixelStorei(GL_UNPACK_SKIP_ROWS, SkipRows);

	glPixelZoom( Xzoom, Yzoom );

	if (Scissor)
	glEnable(GL_SCISSOR_TEST);

	glDrawPixels(DrawWidth, DrawHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);

	glDisable(GL_SCISSOR_TEST);

	uglMesaSwapBuffers();
	}


	UGL_LOCAL void benchmark( void )
	{
	int startTick, endTick, ticksBySec;
	int draws;
	double seconds, pixelsPerSecond;

	printf("Benchmarking (4 sec)...\n");

	/* GL set-up */
	glPixelStorei(GL_UNPACK_SKIP_PIXELS, SkipPixels);
	glPixelStorei(GL_UNPACK_SKIP_ROWS, SkipRows);
	glPixelZoom( Xzoom, Yzoom );
	if (Scissor)
	glEnable(GL_SCISSOR_TEST);

	if (DrawFront)
	glDrawBuffer(GL_FRONT);
	else
	glDrawBuffer(GL_BACK);

	/* Run timing test */
	draws = 0;

	ticksBySec = sysClkRateGet ();
	startTick = tickGet();

	do {
	glDrawPixels(DrawWidth, DrawHeight, ImgFormat, GL_UNSIGNED_BYTE, Image);
	draws++;
	endTick = tickGet ();
	} while ((endTick - startTick)/ticksBySec < 4); /* 4 seconds */

	/* GL clean-up */
	glDisable(GL_SCISSOR_TEST);

	/* Results */
	seconds = (endTick - startTick)/ticksBySec;
	pixelsPerSecond = draws * DrawWidth * DrawHeight / seconds;
	printf("Result: %d draws in %f seconds = %f pixels/sec\n",
	draws, seconds, pixelsPerSecond);
	}

	UGL_LOCAL void echoUse(void)
	{
	printf("Keys:\n");
	printf(" SPACE Reset Parameters\n");
	printf(" Up/Down Move image up/down\n");
	printf(" Left/Right Move image left/right\n");
	printf(" x Decrease X-axis PixelZoom\n");
	printf(" X Increase X-axis PixelZoom\n");
	printf(" y Decrease Y-axis PixelZoom\n");
	printf(" Y Increase Y-axis PixelZoom\n");
	printf(" w Decrease glDrawPixels width*\n");
	printf(" W Increase glDrawPixels width*\n");
	printf(" h Decrease glDrawPixels height*\n");
	printf(" H Increase glDrawPixels height*\n");
	printf(" p Decrease GL_UNPACK_SKIP_PIXELS*\n");
	printf(" P Increase GL_UNPACK_SKIP_PIXELS*\n");
	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 front/back buffer drawing\n");
	printf(" d Toggle dithering\n");
	printf(" b Benchmark test\n");
	printf(" ESC Exit\n");
	printf("* Warning: no limits are imposed on these parameters so it's\n");
	printf(" possible to cause a segfault if you go too far.\n");
	}


	UGL_LOCAL void readKey(UGL_WCHAR key)
	{
	switch (key)
	{
	case UGL_UNI_SPACE:
	reset();
	break;
	case 'd':
	Dither = !Dither;
	if (Dither)
	glEnable(GL_DITHER);
	else
	glDisable(GL_DITHER);
	break;
	case 'w':
	if (DrawWidth > 0)
	DrawWidth--;
	break;
	case 'W':
	DrawWidth++;
	break;
	case 'h':
	if (DrawHeight > 0)
	DrawHeight--;
	break;
	case 'H':
	DrawHeight++;
	break;
	case 'p':
	if (SkipPixels > 0)
	SkipPixels--;
	break;
	case 'P':
	SkipPixels++;
	break;
	case 'r':
	if (SkipRows > 0)
	SkipRows--;
	break;
	case 'R':
	SkipRows++;
	break;
	case 's':
	Scissor = !Scissor;
	break;
	case 'x':
	Xzoom -= 0.1;
	break;
	case 'X':
	Xzoom += 0.1;
	break;
	case 'y':
	Yzoom -= 0.1;
	break;
	case 'Y':
	Yzoom += 0.1;
	break;
	case 'b':
	benchmark();
	break;
	case 'f':
	DrawFront = !DrawFront;
	if (DrawFront)
	glDrawBuffer(GL_FRONT);
	else
	glDrawBuffer(GL_BACK);
	printf("glDrawBuffer(%s)\n", DrawFront ? "GL_FRONT" : "GL_BACK");
	break;
	case UGL_UNI_UP_ARROW:
	Ypos += 1;
	break;
	case UGL_UNI_DOWN_ARROW:
	Ypos -= 1;
	break;
	case UGL_UNI_LEFT_ARROW:
	Xpos -= 1;
	break;
	case UGL_UNI_RIGHT_ARROW:
	Xpos += 1;
	break;
	case UGL_UNI_ESCAPE:
	stopWex = UGL_TRUE;
	break;
	}
	}

	UGL_LOCAL void loopEvent(void)
	{
	UGL_EVENT event;
	UGL_INPUT_EVENT * pInputEvent;

	UGL_FOREVER
	{
	if (uglEventGet (qId, &event, sizeof (event), UGL_NO_WAIT)
	!= UGL_STATUS_Q_EMPTY)
	{
	pInputEvent = (UGL_INPUT_EVENT *)&event;

	if (pInputEvent->header.type == UGL_EVENT_TYPE_KEYBOARD &&
	pInputEvent->modifiers & UGL_KEYBOARD_KEYDOWN)
	readKey(pInputEvent->type.keyboard.key);
	}

	drawGL();
	if (stopWex)
	break;
	}
	}

	UGL_LOCAL void cleanUp (void)
	{
	uglEventQDestroy (eventServiceId, qId);

	uglMesaDestroyContext();
	uglDeinitialize ();
	}

	void windMLDrawPix (UGL_BOOL windMLMode);

	void ugldrawpix (void)
	{
	taskSpawn ("tDrawPix", 210, VX_FP_TASK, 100000, (FUNCPTR)windMLDrawPix,
	UGL_FALSE,1,2,3,4,5,6,7,8,9);
	}

	void windMLDrawPix (UGL_BOOL windMLMode)
	{
	UGL_INPUT_DEVICE_ID keyboardDevId;
	GLuint ciMode;
	GLsizei width, height;

	Image = NULL;
	Scissor = GL_FALSE;
	DrawFront = GL_FALSE;
	Dither = GL_TRUE;

	uglInitialize ();

	uglDriverFind (UGL_KEYBOARD_TYPE, 0,
	(UGL_UINT32 *)&keyboardDevId);

	uglDriverFind (UGL_EVENT_SERVICE_TYPE, 0, (UGL_UINT32 *)&eventServiceId);

	qId = uglEventQCreate (eventServiceId, 100);

	/* Double buffering */
	if (windMLMode)
	umc = uglMesaCreateNewContext(UGL_MESA_DOUBLE
	\| UGL_MESA_WINDML_EXCLUSIVE, NULL);
	else
	umc = uglMesaCreateNewContext(UGL_MESA_DOUBLE, NULL);

	if (umc == NULL)
	{
	uglDeinitialize ();
	return;
	}

	uglMesaMakeCurrentContext(umc, 0, 0, UGL_MESA_FULLSCREEN_WIDTH,
	UGL_MESA_FULLSCREEN_HEIGHT);

	uglMesaGetIntegerv(UGL_MESA_COLOR_INDEXED, &ciMode);
	uglMesaGetIntegerv(UGL_MESA_WIDTH, &width);
	uglMesaGetIntegerv(UGL_MESA_HEIGHT, &height);

	initGL(ciMode, width, height);

	echoUse();

	stopWex = UGL_FALSE;
	loopEvent();

	cleanUp();
	free(Image);

	return;
	}