u_rect.h File Reference

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Functions
void	pipe_copy_rect (ubyte *dst, const struct pipe_format_block *block, unsigned dst_stride, unsigned dst_x, unsigned dst_y, unsigned width, unsigned height, const ubyte *src, int src_stride, unsigned src_x, int src_y)
	Rectangle-related helper functions.
void	pipe_fill_rect (ubyte *dst, const struct pipe_format_block *block, unsigned dst_stride, unsigned dst_x, unsigned dst_y, unsigned width, unsigned height, uint32_t value)
void	util_surface_copy (struct pipe_context *pipe, boolean do_flip, struct pipe_surface *dst, unsigned dst_x, unsigned dst_y, struct pipe_surface *src, unsigned src_x, unsigned src_y, unsigned w, unsigned h)
	Fallback function for pipe->surface_copy().
void	util_surface_fill (struct pipe_context *pipe, struct pipe_surface *dst, unsigned dstx, unsigned dsty, unsigned width, unsigned height, unsigned value)
	Fallback for pipe->surface_fill() function.

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Function Documentation

void pipe_copy_rect	(	ubyte *	dst,
		const struct pipe_format_block *	block,
		unsigned	dst_stride,
		unsigned	dst_x,
		unsigned	dst_y,
		unsigned	width,
		unsigned	height,
		const ubyte *	src,
		int	src_stride,
		unsigned	src_x,
		int	src_y
	)

Rectangle-related helper functions.

Copy 2D rect from one place to another. Position and sizes are in pixels. src_pitch may be negative to do vertical flip of pixels from source.

Definition at line 46 of file u_rect.c.

References assert, pipe_format_block::height, pipe_format_block::size, and pipe_format_block::width.

{
   unsigned i;
   int src_stride_pos = src_stride < 0 ? -src_stride : src_stride;

   assert(block->size > 0);
   assert(block->width > 0);
   assert(block->height > 0);
   assert(src_x >= 0);
   assert(src_y >= 0);
   assert(dst_x >= 0);
   assert(dst_y >= 0);

   dst_x /= block->width;
   dst_y /= block->height;
   width = (width + block->width - 1)/block->width;
   height = (height + block->height - 1)/block->height;
   src_x /= block->width;
   src_y /= block->height;
   
   dst += dst_x * block->size;
   src += src_x * block->size;
   dst += dst_y * dst_stride;
   src += src_y * src_stride_pos;
   width *= block->size;

   if (width == dst_stride && width == src_stride)
      memcpy(dst, src, height * width);
   else {
      for (i = 0; i < height; i++) {
         memcpy(dst, src, width);
         dst += dst_stride;
         src += src_stride;
      }
   }
}

void pipe_fill_rect	(	ubyte *	dst,
		const struct pipe_format_block *	block,
		unsigned	dst_stride,
		unsigned	dst_x,
		unsigned	dst_y,
		unsigned	width,
		unsigned	height,
		uint32_t	value
	)

Definition at line 94 of file u_rect.c.

References assert, pipe_format_block::height, pipe_format_block::size, and pipe_format_block::width.

{
   unsigned i, j;
   unsigned width_size;

   assert(block->size > 0);
   assert(block->width > 0);
   assert(block->height > 0);
   assert(dst_x >= 0);
   assert(dst_y >= 0);

   dst_x /= block->width;
   dst_y /= block->height;
   width = (width + block->width - 1)/block->width;
   height = (height + block->height - 1)/block->height;
   
   dst += dst_x * block->size;
   dst += dst_y * dst_stride;
   width_size = width * block->size;
   
   switch (block->size) {
   case 1:
      if(dst_stride == width_size)
         memset(dst, (ubyte) value, height * width_size);
      else {
         for (i = 0; i < height; i++) {
            memset(dst, (ubyte) value, width_size);
            dst += dst_stride;
         }
      }
      break;
   case 2:
      for (i = 0; i < height; i++) {
         uint16_t *row = (uint16_t *)dst;
         for (j = 0; j < width; j++)
            *row++ = (uint16_t) value;
         dst += dst_stride;
      }
      break;
   case 4:
      for (i = 0; i < height; i++) {
         uint32_t *row = (uint32_t *)dst;
         for (j = 0; j < width; j++)
            *row++ = value;
         dst += dst_stride;
      }
      break;
   default:
         assert(0);
         break;
   }
}

void util_surface_copy	(	struct pipe_context *	pipe,
		boolean	do_flip,
		struct pipe_surface *	dst,
		unsigned	dst_x,
		unsigned	dst_y,
		struct pipe_surface *	src,
		unsigned	src_x,
		unsigned	src_y,
		unsigned	w,
		unsigned	h
	)

Fallback function for pipe->surface_copy().

Note: (X,Y)=(0,0) is always the upper-left corner. if do_flip, flip the image vertically on its way from src rect to dst rect. XXX should probably put this in new u_surface.c file...

Definition at line 163 of file u_rect.c.

References assert, pipe_surface::block, pipe_surface::face, pipe_screen::get_tex_surface, pipe_format_block::height, pipe_surface::level, PIPE_BUFFER_USAGE_CPU_READ, PIPE_BUFFER_USAGE_CPU_WRITE, pipe_copy_rect(), pipe_context::screen, pipe_format_block::size, pipe_surface::stride, pipe_screen::surface_map, pipe_screen::surface_unmap, pipe_screen::tex_surface_release, pipe_surface::texture, pipe_surface::usage, pipe_format_block::width, and pipe_surface::zslice.

{
   struct pipe_screen *screen = pipe->screen;
   struct pipe_surface *new_src = NULL, *new_dst = NULL;
   void *dst_map;
   const void *src_map;

   assert(dst->block.size == src->block.size);
   assert(dst->block.width == src->block.width);
   assert(dst->block.height == src->block.height);

   if ((src->usage & PIPE_BUFFER_USAGE_CPU_READ) == 0) {
      /* Need to create new src surface which is CPU readable */
      assert(src->texture);
      if (!src->texture)
         return;
      new_src = screen->get_tex_surface(screen,
                                        src->texture,
                                        src->face,
                                        src->level,
                                        src->zslice,
                                        PIPE_BUFFER_USAGE_CPU_READ);
      src = new_src;
   }

   if ((dst->usage & PIPE_BUFFER_USAGE_CPU_WRITE) == 0) {
      /* Need to create new dst surface which is CPU writable */
      assert(dst->texture);
      if (!dst->texture)
         return;
      new_dst = screen->get_tex_surface(screen,
                                        dst->texture,
                                        dst->face,
                                        dst->level,
                                        dst->zslice,
                                        PIPE_BUFFER_USAGE_CPU_WRITE);
      dst = new_dst;
   }

   src_map = pipe->screen->surface_map(screen,
                                       src, PIPE_BUFFER_USAGE_CPU_READ);
   dst_map = pipe->screen->surface_map(screen,
                                       dst, PIPE_BUFFER_USAGE_CPU_WRITE);

   assert(src_map);
   assert(dst_map);

   if (src_map && dst_map) {
      /* If do_flip, invert src_y position and pass negative src stride */
      pipe_copy_rect(dst_map,
                     &dst->block,
                     dst->stride,
                     dst_x, dst_y,
                     w, h,
                     src_map,
                     do_flip ? -(int) src->stride : src->stride,
                     src_x,
                     do_flip ? src_y + h - 1 : src_y);
   }

   pipe->screen->surface_unmap(pipe->screen, src);
   pipe->screen->surface_unmap(pipe->screen, dst);

   if (new_src)
      screen->tex_surface_release(screen, &new_src);
   if (new_dst)
      screen->tex_surface_release(screen, &new_dst);
}

void util_surface_fill	(	struct pipe_context *	pipe,
		struct pipe_surface *	dst,
		unsigned	dstx,
		unsigned	dsty,
		unsigned	width,
		unsigned	height,
		unsigned	value
	)

Fallback for pipe->surface_fill() function.

XXX should probably put this in new u_surface.c file...

Definition at line 257 of file u_rect.c.

References assert, pipe_surface::block, pipe_surface::face, get_pointer(), pipe_screen::get_tex_surface, pipe_surface::level, PIPE_BUFFER_USAGE_CPU_WRITE, pipe_fill_rect(), pipe_context::screen, pipe_format_block::size, pipe_surface::stride, pipe_screen::surface_map, pipe_screen::surface_unmap, pipe_screen::tex_surface_release, pipe_surface::texture, UBYTE_TO_USHORT, pipe_surface::usage, and pipe_surface::zslice.

{
   struct pipe_screen *screen = pipe->screen;
   struct pipe_surface *new_dst = NULL;
   void *dst_map;

   if ((dst->usage & PIPE_BUFFER_USAGE_CPU_WRITE) == 0) {
      /* Need to create new dst surface which is CPU writable */
      assert(dst->texture);
      if (!dst->texture)
         return;
      new_dst = screen->get_tex_surface(screen,
                                        dst->texture,
                                        dst->face,
                                        dst->level,
                                        dst->zslice,
                                        PIPE_BUFFER_USAGE_CPU_WRITE);
      dst = new_dst;
   }

   dst_map = pipe->screen->surface_map(screen,
                                       dst, PIPE_BUFFER_USAGE_CPU_WRITE);

   assert(dst_map);

   if (dst_map) {
      assert(dst->stride > 0);

      switch (dst->block.size) {
      case 1:
      case 2:
      case 4:
         pipe_fill_rect(dst_map, &dst->block, dst->stride,
                        dstx, dsty, width, height, value);
         break;
      case 8:
         {
            /* expand the 4-byte clear value to an 8-byte value */
            ushort *row = (ushort *) get_pointer(dst, dst_map, dstx, dsty);
            ushort val0 = UBYTE_TO_USHORT((value >>  0) & 0xff);
            ushort val1 = UBYTE_TO_USHORT((value >>  8) & 0xff);
            ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
            ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
            unsigned i, j;
            val0 = (val0 << 8) | val0;
            val1 = (val1 << 8) | val1;
            val2 = (val2 << 8) | val2;
            val3 = (val3 << 8) | val3;
            for (i = 0; i < height; i++) {
               for (j = 0; j < width; j++) {
                  row[j*4+0] = val0;
                  row[j*4+1] = val1;
                  row[j*4+2] = val2;
                  row[j*4+3] = val3;
               }
               row += dst->stride/2;
            }
         }
         break;
      default:
         assert(0);
         break;
      }
   }

   pipe->screen->surface_unmap(pipe->screen, dst);

   if (new_dst)
      screen->tex_surface_release(screen, &new_dst);
}

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