static Mask * mask_new( VipsImage *im, int x, int y, PEL *ink, VipsImage *mask_im ) { Mask *mask; Rect area, image; if( im_check_coding_noneorlabq( "im_draw_mask", im ) || im_incheck( mask_im ) || im_check_mono( "im_draw_mask", mask_im ) || im_check_uncoded( "im_draw_mask", mask_im ) || im_check_format( "im_draw_mask", mask_im, IM_BANDFMT_UCHAR ) || !(mask = IM_NEW( NULL, Mask )) ) return( NULL ); if( !im__draw_init( DRAW( mask ), im, ink ) ) { mask_free( mask ); return( NULL ); } mask->x = x; mask->y = y; mask->mask_im = mask_im; /* Find the area we draw on the image. */ area.left = x; area.top = y; area.width = mask_im->Xsize; area.height = mask_im->Ysize; image.left = 0; image.top = 0; image.width = im->Xsize; image.height = im->Ysize; im_rect_intersectrect( &area, &image, &mask->image_clip ); /* And the area of the mask image we use. */ mask->mask_clip = mask->image_clip; mask->mask_clip.left -= x; mask->mask_clip.top -= y; return( mask ); }
/** * im_draw_rect: * @image: image to draw on * @left: area to paint * @top: area to paint * @width: area to paint * @height: area to paint * @fill: fill the rect * @ink: paint with this colour * * Paint pixels within @left, @top, @width, @height in @image with @ink. If * @fill is zero, just paint a 1-pixel-wide outline. * * See also: im_draw_circle(). * * Returns: 0 on success, or -1 on error. */ int im_draw_rect( IMAGE *image, int left, int top, int width, int height, int fill, VipsPel *ink ) { Rect im, rect, clipped; Draw draw; if( !fill ) return( im_draw_rect( image, left, top, width, 1, 1, ink ) || im_draw_rect( image, left + width - 1, top, 1, height, 1, ink ) || im_draw_rect( image, left, top + height - 1, width, 1, 1, ink ) || im_draw_rect( image, left, top, 1, height, 1, ink ) ); int x, y; VipsPel *to; VipsPel *q; /* Find area we plot. */ im.left = 0; im.top = 0; im.width = image->Xsize; im.height = image->Ysize; rect.left = left; rect.top = top; rect.width = width; rect.height = height; im_rect_intersectrect( &rect, &im, &clipped ); /* Any points left to plot? */ if( im_rect_isempty( &clipped ) ) return( 0 ); if( im_check_coding_known( "im_draw_rect", image ) || !im__draw_init( &draw, image, ink ) ) return( -1 ); /* We plot the first line pointwise, then memcpy() it for the * subsequent lines. */ to = IM_IMAGE_ADDR( image, clipped.left, clipped.top ); q = to; for( x = 0; x < clipped.width; x++ ) { im__draw_pel( &draw, q ); q += draw.psize; } q = to + draw.lsize; for( y = 1; y < clipped.height; y++ ) { memcpy( q, to, clipped.width * draw.psize ); q += draw.lsize; } im__draw_free( &draw ); return( 0 ); }