src/parsec/disk-image/parsec/parsec-benchmark/pkgs/libs/mesa/src/src/mesa/drivers/dri/intel/intel_pixel_bitmap.c - public/gem5-resources - Git at Google

 /**************************************************************************
  *
  * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
  * 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, 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 portionsalloc
  * 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
  *
  **************************************************************************/

 #include "glheader.h"
 #include "enums.h"
 #include "image.h"
 #include "colormac.h"
 #include "mtypes.h"
 #include "macros.h"
 #include "bufferobj.h"
 #include "swrast/swrast.h"

 #include "intel_screen.h"
 #include "intel_context.h"
 #include "intel_ioctl.h"
 #include "intel_batchbuffer.h"
 #include "intel_blit.h"
 #include "intel_regions.h"
 #include "intel_buffer_objects.h"
 #include "intel_buffers.h"
 #include "intel_pixel.h"


 #define FILE_DEBUG_FLAG DEBUG_PIXEL


 /* Unlike the other intel_pixel_* functions, the expectation here is
  * that the incoming data is not in a PBO.  With the XY_TEXT blit
  * method, there's no benefit haveing it in a PBO, but we could
  * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
  * PBO bitmaps.  I think they are probably pretty rare though - I
  * wonder if Xgl uses them?
  */
 static const GLubyte *map_pbo( GLcontext *ctx,
 			       GLsizei width, GLsizei height,
 			       const struct gl_pixelstore_attrib *unpack,
 			       const GLubyte *bitmap )
 {
    GLubyte *buf;

    if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
 				  GL_COLOR_INDEX, GL_BITMAP,
 				  (GLvoid *) bitmap)) {
       _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
       return NULL;
    }

    buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
 					   GL_READ_ONLY_ARB,
 					   unpack->BufferObj);
    if (!buf) {
       _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
       return NULL;
    }

    return ADD_POINTERS(buf, bitmap);
 }

 static GLboolean test_bit( const GLubyte *src,
 			    GLuint bit )
 {
    return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
 }

 static void set_bit( GLubyte *dest,
 			  GLuint bit )
 {
    dest[bit/8] |= 1 << (bit % 8);
 }

 /* Extract a rectangle's worth of data from the bitmap.  Called
  * per-cliprect.
  */
 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
 			      const struct gl_pixelstore_attrib *unpack,
 			      const GLubyte *bitmap,
 			      GLuint x, GLuint y,
 			      GLuint w, GLuint h,
 			      GLubyte *dest,
 			      GLuint row_align,
 			      GLboolean invert)
 {
    GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
    GLuint mask = unpack->LsbFirst ? 0 : 7;
    GLuint bit = 0;
    GLint row, col;
    GLint first, last;
    GLint incr;
    GLuint count = 0;

    if (INTEL_DEBUG & DEBUG_PIXEL)
       _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
 		   __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);

    if (invert) {
       first = h-1;
       last = 0;
       incr = -1;
    }
    else {
       first = 0;
       last = h-1;
       incr = 1;
    }

    /* Require that dest be pre-zero'd.
     */
    for (row = first; row != (last+incr); row += incr) {
       const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
 						    width, height,
 						    GL_COLOR_INDEX, GL_BITMAP,
 						    y + row, x);

       for (col = 0; col < w; col++, bit++) {
 	 if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
 	    set_bit(dest, bit ^ 7);
 	    count++;
 	 }
       }

       if (row_align)
 	 bit = ALIGN(bit, row_align);
    }

    return count;
 }


 /*
  * Render a bitmap.
  */
 static GLboolean
 do_blit_bitmap( GLcontext *ctx,
 		GLint dstx, GLint dsty,
 		GLsizei width, GLsizei height,
 		const struct gl_pixelstore_attrib *unpack,
 		const GLubyte *bitmap )
 {
    struct intel_context *intel = intel_context(ctx);
    struct intel_region *dst = intel_drawbuf_region(intel);
    GLfloat tmpColor[4];
    GLubyte ubcolor[4];
    GLuint color8888, color565;

    if (!dst)
        return GL_FALSE;

    if (unpack->BufferObj->Name) {
       bitmap = map_pbo(ctx, width, height, unpack, bitmap);
       if (bitmap == NULL)
 	 return GL_TRUE;	/* even though this is an error, we're done */
    }

    COPY_4V(tmpColor, ctx->Current.RasterColor);

    if (NEED_SECONDARY_COLOR(ctx)) {
        ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
    }

    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
    UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);

    color8888 = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], ubcolor[2], ubcolor[3]);
    color565 = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]);

    /* Does zoom apply to bitmaps?
     */
    if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F) ||
        ctx->Pixel.ZoomX != 1.0F ||
        ctx->Pixel.ZoomY != 1.0F)
       return GL_FALSE;

    LOCK_HARDWARE(intel);

    if (intel->driDrawable->numClipRects) {
       __DRIdrawablePrivate *dPriv = intel->driDrawable;
       drm_clip_rect_t *box = dPriv->pClipRects;
       drm_clip_rect_t dest_rect;
       GLint nbox = dPriv->numClipRects;
       GLint srcx = 0, srcy = 0;
       GLint orig_screen_x1, orig_screen_y2;
       GLuint i;


       orig_screen_x1 = dPriv->x + dstx;
       orig_screen_y2 = dPriv->y + (dPriv->h - dsty);

       /* Do scissoring in GL coordinates:
        */
       if (ctx->Scissor.Enabled)
       {
 	 GLint x = ctx->Scissor.X;
 	 GLint y = ctx->Scissor.Y;
 	 GLuint w = ctx->Scissor.Width;
 	 GLuint h = ctx->Scissor.Height;

          if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height))
             goto out;
       }

       /* Convert from GL to hardware coordinates:
        */
       dsty = dPriv->y + (dPriv->h - dsty - height);
       dstx = dPriv->x + dstx;

       dest_rect.x1 = dstx < 0 ? 0 : dstx;
       dest_rect.y1 = dsty < 0 ? 0 : dsty;
       dest_rect.x2 = dstx + width < 0 ? 0 : dstx + width;
       dest_rect.y2 = dsty + height < 0 ? 0 : dsty + height;

       for (i = 0; i < nbox; i++) {
          drm_clip_rect_t rect;
 	 int box_w, box_h;
 	 GLint px, py;
 	 GLuint stipple[32];

          if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i]))
             continue;

 	 /* Now go back to GL coordinates to figure out what subset of
 	  * the bitmap we are uploading for this cliprect:
 	  */
 	 box_w = rect.x2 - rect.x1;
 	 box_h = rect.y2 - rect.y1;
 	 srcx = rect.x1 - orig_screen_x1;
 	 srcy = orig_screen_y2 - rect.y2;


 #define DY 32
 #define DX 32

 	 /* Then, finally, chop it all into chunks that can be
 	  * digested by hardware:
 	  */
 	 for (py = 0; py < box_h; py += DY) {
 	    for (px = 0; px < box_w; px += DX) {
 	       int h = MIN2(DY, box_h - py);
 	       int w = MIN2(DX, box_w - px);
 	       GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
 	       GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
 		  ctx->Color.LogicOp : GL_COPY;

 	       assert(sz <= sizeof(stipple));
 	       memset(stipple, 0, sz);

 	       /* May need to adjust this when padding has been introduced in
 		* sz above:
 		*/
 	       if (get_bitmap_rect(width, height, unpack,
 				   bitmap,
 				   srcx + px, srcy + py, w, h,
 				   (GLubyte *)stipple,
 				   8,
 				   GL_TRUE) == 0)
 		  continue;

 	       /*
 		*/
 	       intelEmitImmediateColorExpandBlit( intel,
 						  dst->cpp,
 						  (GLubyte *)stipple,
 						  sz,
 						  (dst->cpp == 2) ? color565 : color8888,
 						  dst->pitch,
 						  dst->buffer,
 						  0,
 						  dst->tiled,
 						  rect.x1 + px,
 						  rect.y2 - (py + h),
 						  w, h,
 						  logic_op);
 	    }
 	 }
       }
    out:
       intel_batchbuffer_flush(intel->batch);
    }
    UNLOCK_HARDWARE(intel);


    if (unpack->BufferObj->Name) {
       /* done with PBO so unmap it now */
       ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
                               unpack->BufferObj);
    }

    return GL_TRUE;
 }


 /* There are a large number of possible ways to implement bitmap on
  * this hardware, most of them have some sort of drawback.  Here are a
  * few that spring to mind:
  *
  * Blit:
  *    - XY_MONO_SRC_BLT_CMD
  *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
  *    - XY_TEXT_BLT
  *    - XY_TEXT_IMMEDIATE_BLT
  *         - blit per cliprect, subject to maximum immediate data size.
  *    - XY_COLOR_BLT
  *         - per pixel or run of pixels
  *    - XY_PIXEL_BLT
  *         - good for sparse bitmaps
  *
  * 3D engine:
  *    - Point per pixel
  *    - Translate bitmap to an alpha texture and render as a quad
  *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
  */
 void
 intelBitmap(GLcontext * ctx,
 	    GLint x, GLint y,
 	    GLsizei width, GLsizei height,
 	    const struct gl_pixelstore_attrib *unpack,
 	    const GLubyte * pixels)
 {
    if (do_blit_bitmap(ctx, x, y, width, height,
                           unpack, pixels))
       return;

    if (INTEL_DEBUG & DEBUG_PIXEL)
       _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);

    _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
 }
	/**************************************************************************
	*
	* Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
	* 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, 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 portionsalloc
	* 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
	*
	**************************************************************************/

	#include "glheader.h"
	#include "enums.h"
	#include "image.h"
	#include "colormac.h"
	#include "mtypes.h"
	#include "macros.h"
	#include "bufferobj.h"
	#include "swrast/swrast.h"

	#include "intel_screen.h"
	#include "intel_context.h"
	#include "intel_ioctl.h"
	#include "intel_batchbuffer.h"
	#include "intel_blit.h"
	#include "intel_regions.h"
	#include "intel_buffer_objects.h"
	#include "intel_buffers.h"
	#include "intel_pixel.h"



	#define FILE_DEBUG_FLAG DEBUG_PIXEL


	/* Unlike the other intel_pixel_* functions, the expectation here is
	* that the incoming data is not in a PBO. With the XY_TEXT blit
	* method, there's no benefit haveing it in a PBO, but we could
	* implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
	* PBO bitmaps. I think they are probably pretty rare though - I
	* wonder if Xgl uses them?
	*/
	static const GLubyte map_pbo( GLcontext ctx,
	GLsizei width, GLsizei height,
	const struct gl_pixelstore_attrib *unpack,
	const GLubyte *bitmap )
	{
	GLubyte *buf;

	if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
	GL_COLOR_INDEX, GL_BITMAP,
	(GLvoid *) bitmap)) {
	_mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
	return NULL;
	}

	buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
	GL_READ_ONLY_ARB,
	unpack->BufferObj);
	if (!buf) {
	_mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
	return NULL;
	}

	return ADD_POINTERS(buf, bitmap);
	}

	static GLboolean test_bit( const GLubyte *src,
	GLuint bit )
	{
	return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
	}

	static void set_bit( GLubyte *dest,
	GLuint bit )
	{
	dest[bit/8] \|= 1 << (bit % 8);
	}

	/* Extract a rectangle's worth of data from the bitmap. Called
	* per-cliprect.
	*/
	static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
	const struct gl_pixelstore_attrib *unpack,
	const GLubyte *bitmap,
	GLuint x, GLuint y,
	GLuint w, GLuint h,
	GLubyte *dest,
	GLuint row_align,
	GLboolean invert)
	{
	GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
	GLuint mask = unpack->LsbFirst ? 0 : 7;
	GLuint bit = 0;
	GLint row, col;
	GLint first, last;
	GLint incr;
	GLuint count = 0;

	if (INTEL_DEBUG & DEBUG_PIXEL)
	_mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
	__FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);

	if (invert) {
	first = h-1;
	last = 0;
	incr = -1;
	}
	else {
	first = 0;
	last = h-1;
	incr = 1;
	}

	/* Require that dest be pre-zero'd.
	*/
	for (row = first; row != (last+incr); row += incr) {
	const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
	width, height,
	GL_COLOR_INDEX, GL_BITMAP,
	y + row, x);

	for (col = 0; col < w; col++, bit++) {
	if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
	set_bit(dest, bit ^ 7);
	count++;
	}
	}

	if (row_align)
	bit = ALIGN(bit, row_align);
	}

	return count;
	}




	/*
	* Render a bitmap.
	*/
	static GLboolean
	do_blit_bitmap( GLcontext *ctx,
	GLint dstx, GLint dsty,
	GLsizei width, GLsizei height,
	const struct gl_pixelstore_attrib *unpack,
	const GLubyte *bitmap )
	{
	struct intel_context *intel = intel_context(ctx);
	struct intel_region *dst = intel_drawbuf_region(intel);
	GLfloat tmpColor[4];
	GLubyte ubcolor[4];
	GLuint color8888, color565;

	if (!dst)
	return GL_FALSE;

	if (unpack->BufferObj->Name) {
	bitmap = map_pbo(ctx, width, height, unpack, bitmap);
	if (bitmap == NULL)
	return GL_TRUE; /* even though this is an error, we're done */
	}

	COPY_4V(tmpColor, ctx->Current.RasterColor);

	if (NEED_SECONDARY_COLOR(ctx)) {
	ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
	}

	UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
	UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
	UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
	UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);

	color8888 = INTEL_PACKCOLOR8888(ubcolor[0], ubcolor[1], ubcolor[2], ubcolor[3]);
	color565 = INTEL_PACKCOLOR565(ubcolor[0], ubcolor[1], ubcolor[2]);

	/* Does zoom apply to bitmaps?
	*/
	if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F) \|\|
	ctx->Pixel.ZoomX != 1.0F \|\|
	ctx->Pixel.ZoomY != 1.0F)
	return GL_FALSE;

	LOCK_HARDWARE(intel);

	if (intel->driDrawable->numClipRects) {
	__DRIdrawablePrivate *dPriv = intel->driDrawable;
	drm_clip_rect_t *box = dPriv->pClipRects;
	drm_clip_rect_t dest_rect;
	GLint nbox = dPriv->numClipRects;
	GLint srcx = 0, srcy = 0;
	GLint orig_screen_x1, orig_screen_y2;
	GLuint i;


	orig_screen_x1 = dPriv->x + dstx;
	orig_screen_y2 = dPriv->y + (dPriv->h - dsty);

	/* Do scissoring in GL coordinates:
	*/
	if (ctx->Scissor.Enabled)
	{
	GLint x = ctx->Scissor.X;
	GLint y = ctx->Scissor.Y;
	GLuint w = ctx->Scissor.Width;
	GLuint h = ctx->Scissor.Height;

	if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height))
	goto out;
	}

	/* Convert from GL to hardware coordinates:
	*/
	dsty = dPriv->y + (dPriv->h - dsty - height);
	dstx = dPriv->x + dstx;

	dest_rect.x1 = dstx < 0 ? 0 : dstx;
	dest_rect.y1 = dsty < 0 ? 0 : dsty;
	dest_rect.x2 = dstx + width < 0 ? 0 : dstx + width;
	dest_rect.y2 = dsty + height < 0 ? 0 : dsty + height;

	for (i = 0; i < nbox; i++) {
	drm_clip_rect_t rect;
	int box_w, box_h;
	GLint px, py;
	GLuint stipple[32];

	if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i]))
	continue;

	/* Now go back to GL coordinates to figure out what subset of
	* the bitmap we are uploading for this cliprect:
	*/
	box_w = rect.x2 - rect.x1;
	box_h = rect.y2 - rect.y1;
	srcx = rect.x1 - orig_screen_x1;
	srcy = orig_screen_y2 - rect.y2;


	#define DY 32
	#define DX 32

	/* Then, finally, chop it all into chunks that can be
	* digested by hardware:
	*/
	for (py = 0; py < box_h; py += DY) {
	for (px = 0; px < box_w; px += DX) {
	int h = MIN2(DY, box_h - py);
	int w = MIN2(DX, box_w - px);
	GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
	GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
	ctx->Color.LogicOp : GL_COPY;

	assert(sz <= sizeof(stipple));
	memset(stipple, 0, sz);

	/* May need to adjust this when padding has been introduced in
	* sz above:
	*/
	if (get_bitmap_rect(width, height, unpack,
	bitmap,
	srcx + px, srcy + py, w, h,
	(GLubyte *)stipple,
	8,
	GL_TRUE) == 0)
	continue;

	/*
	*/
	intelEmitImmediateColorExpandBlit( intel,
	dst->cpp,
	(GLubyte *)stipple,
	sz,
	(dst->cpp == 2) ? color565 : color8888,
	dst->pitch,
	dst->buffer,
	0,
	dst->tiled,
	rect.x1 + px,
	rect.y2 - (py + h),
	w, h,
	logic_op);
	}
	}
	}
	out:
	intel_batchbuffer_flush(intel->batch);
	}
	UNLOCK_HARDWARE(intel);


	if (unpack->BufferObj->Name) {
	/* done with PBO so unmap it now */
	ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
	unpack->BufferObj);
	}

	return GL_TRUE;
	}





	/* There are a large number of possible ways to implement bitmap on
	* this hardware, most of them have some sort of drawback. Here are a
	* few that spring to mind:
	*
	* Blit:
	* - XY_MONO_SRC_BLT_CMD
	* - use XY_SETUP_CLIP_BLT for cliprect clipping.
	* - XY_TEXT_BLT
	* - XY_TEXT_IMMEDIATE_BLT
	* - blit per cliprect, subject to maximum immediate data size.
	* - XY_COLOR_BLT
	* - per pixel or run of pixels
	* - XY_PIXEL_BLT
	* - good for sparse bitmaps
	*
	* 3D engine:
	* - Point per pixel
	* - Translate bitmap to an alpha texture and render as a quad
	* - Chop bitmap up into 32x32 squares and render w/polygon stipple.
	*/
	void
	intelBitmap(GLcontext * ctx,
	GLint x, GLint y,
	GLsizei width, GLsizei height,
	const struct gl_pixelstore_attrib *unpack,
	const GLubyte * pixels)
	{
	if (do_blit_bitmap(ctx, x, y, width, height,
	unpack, pixels))
	return;

	if (INTEL_DEBUG & DEBUG_PIXEL)
	_mesa_printf("%s: fallback to swrast\n", __FUNCTION__);

	_swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
	}