示例#1
0
/*
 * Render a bitmap.
 */
static bool
do_blit_bitmap( struct gl_context *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 gl_framebuffer *fb = ctx->DrawBuffer;
   struct intel_renderbuffer *irb;
   GLfloat tmpColor[4];
   GLubyte ubcolor[4];
   GLuint color;
   GLsizei bitmap_width = width;
   GLsizei bitmap_height = height;
   GLint px, py;
   GLuint stipple[32];
   GLint orig_dstx = dstx;
   GLint orig_dsty = dsty;

   /* Update draw buffer bounds */
   _mesa_update_state(ctx);

   if (ctx->Depth.Test) {
      /* The blit path produces incorrect results when depth testing is on.
       * It seems the blit Z coord is always 1.0 (the far plane) so fragments
       * will likely be obscured by other, closer geometry.
       */
      return false;
   }

   intel_prepare_render(intel);

   if (fb->_NumColorDrawBuffers != 1) {
      perf_debug("accelerated glBitmap() only supports rendering to a "
                 "single color buffer\n");
      return false;
   }

   irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);

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

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

   if (_mesa_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]);

   switch (irb->mt->format) {
   case MESA_FORMAT_B8G8R8A8_UNORM:
   case MESA_FORMAT_B8G8R8X8_UNORM:
      color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
      break;
   case MESA_FORMAT_B5G6R5_UNORM:
      color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
      break;
   default:
      perf_debug("Unsupported format %s in accelerated glBitmap()\n",
                 _mesa_get_format_name(irb->mt->format));
      return false;
   }

   if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
      return false;

   /* Clip to buffer bounds and scissor. */
   if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
			     fb->_Xmax, fb->_Ymax,
			     &dstx, &dsty, &width, &height))
      goto out;

   dsty = y_flip(fb, dsty, height);

#define DY 32
#define DX 32

   /* Chop it all into chunks that can be digested by hardware: */
   for (py = 0; py < height; py += DY) {
      for (px = 0; px < width; px += DX) {
	 int h = MIN2(DY, height - py);
	 int w = MIN2(DX, width - 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:
	  *
	  * Have to translate destination coordinates back into source
	  * coordinates.
	  */
         int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack,
                                     bitmap,
                                     -orig_dstx + (dstx + px),
                                     -orig_dsty + y_flip(fb, dsty + py, h),
                                     w, h,
                                     (GLubyte *)stipple,
                                     8,
                                     _mesa_is_winsys_fbo(fb));
         if (count == 0)
	    continue;

	 if (!intelEmitImmediateColorExpandBlit(intel,
						irb->mt->cpp,
						(GLubyte *)stipple,
						sz,
						color,
						irb->mt->region->pitch,
						irb->mt->region->bo,
						0,
						irb->mt->region->tiling,
						dstx + px,
						dsty + py,
						w, h,
						logic_op)) {
	    return false;
	 }

         if (ctx->Query.CurrentOcclusionObject)
            ctx->Query.CurrentOcclusionObject->Result += count;
      }
   }
out:

   if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
      intel_batchbuffer_flush(intel);

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

   intel_check_front_buffer_rendering(intel);

   return true;
}
示例#2
0
/*
 * 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) ||
       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);
	    } 
	 } 
      }
      intel->need_flush = GL_TRUE;
   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;
}