diff options
Diffstat (limited to 'libre/xorg-server-libre/glamor-upstream-fix.patch')
| -rw-r--r-- | libre/xorg-server-libre/glamor-upstream-fix.patch | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/libre/xorg-server-libre/glamor-upstream-fix.patch b/libre/xorg-server-libre/glamor-upstream-fix.patch deleted file mode 100644 index 89dd4d017..000000000 --- a/libre/xorg-server-libre/glamor-upstream-fix.patch +++ /dev/null @@ -1,178 +0,0 @@ -From 3c0431b8911241552a15a43e4279c50658b50a18 Mon Sep 17 00:00:00 2001 -From: Keith Packard <keithp@keithp.com> -Date: Wed, 16 Jul 2014 23:03:23 +0000 -Subject: glamor: Fix temp picture coordinates in glamor_composite_clipped_region - -To understand this patch, let's start at the protocol interface where -the relationship between the coordinate spaces is documented: - - static Bool - _glamor_composite(CARD8 op, - PicturePtr source, - PicturePtr mask, - PicturePtr dest, - INT16 x_source, - INT16 y_source, - INT16 x_mask, - INT16 y_mask, - INT16 x_dest, INT16 y_dest, - CARD16 width, CARD16 height, Bool fallback) - -The coordinates are passed to this function directly off the wire and -are all relative to their respective drawables. For Windows, this means -that they are relative to the upper left corner of the window, in -whatever pixmap that window is getting drawn to. - -_glamor_composite calls miComputeCompositeRegion to construct a clipped -region to actually render to. In reality, miComputeCompositeRegion clips -only to the destination these days; source clip region based clipping -would have to respect the transform, which isn't really possible. The -returned region is relative to the screen in which dest lives; offset by -dest->drawable.x and dest->drawable.y. - -What is important to realize here is that, because of clipping, the -composite region may not have the same position within the destination -drawable as x_dest, y_dest. The protocol coordinates now exist solely to -'pin' the three objects together. - - extents->x1,y1 Screen origin of clipped operation - width,height Extents of the clipped operation - x_dest,y_dest Unclipped destination-relative operation coordinate - x_source,y_source Unclipped source-relative operation coordinate - x_mask,y_mask Unclipped mask-relative operation coordinate - -One thing we want to know is what the offset is from the original -operation origin to the clipped origin - - Destination drawable relative coordinates of the clipped operation: - - x_dest_clipped = extents->x1 - dest->drawable.x - y_dest_clipped = extents->y1 - dest->drawable.y - - Offset from the original operation origin: - - x_off_clipped = x_dest_clipped - x_dest - y_off_clipped = y_dest_clipped - y_dest - - Source drawable relative coordinates of the clipped operation: - - x_source_clipped = x_source + x_off_clipped; - y_source_clipped = y_source + y_off_clipped; - - Mask drawable relative coordinates of the clipped operation: - - x_mask_clipped = x_source + x_off_clipped; - y_mask_clipped = y_source + y_off_clipped; - -This is where the original code fails -- it doesn't subtract the -destination drawable location when computing the distance that the -operation has been moved by clipping. Here's what it does when -constructing a temporary source picture: - - temp_src = - glamor_convert_gradient_picture(screen, source, - extent->x1 + x_source - x_dest, - extent->y1 + y_source - y_dest, - width, height); - ... - x_temp_src = -extent->x1 + x_dest; - y_temp_src = -extent->y1 + y_dest; - -glamor_convert_gradient_picture needs source drawable relative -coordinates, but that is not what it's getting; it's getting -screen-relative coordinates for the destination, adjusted by the -distance between the provided source and destination operation -coordinates. We want x_source_clipped and y_source_clipped: - - x_source_clipped = x_source + x_off_clipped - = x_source + x_dest_clipped - x_dest - = x_source + extents->x1 - dest->drawable.x - x_dest - -x_temp_src/y_temp_src are supposed to be the coordinates of the original -operation translated to the temporary picture: - - x_temp_src = x_source - x_source_clipped; - y_temp_src = y_source - y_source_clipped; - -Note that x_source_clipped/y_source_clipped will never be less than -x_source/y_source because all we're doing is clipping. This means that -x_temp_src/y_temp_src will always be non-positive; the original source -coordinate can never be strictly *inside* the temporary image or we -could have made the temporary image smaller. - - x_temp_src = x_source - x_source_clipped - = x_source - (x_source + x_off_clipped) - = -x_off_clipped - = x_dest - x_dest_clipped - = x_dest - (extents->x1 - dest->drawable.x) - -Again, this is off by the destination origin within the screen -coordinate space. - -The code should look like: - - temp_src = - glamor_convert_gradient_picture(screen, source, - extent->x1 + x_source - x_dest - dest->pDrawable->x, - extent->y1 + y_source - y_dest - dest->pDrawable->y, - width, height); - - x_temp_src = -extent->x1 + x_dest + dest->pDrawable->x; - y_temp_src = -extent->y1 + y_dest + dest->pDrawable->y; - -Signed-off-by: Keith Packard <keithp@keithp.com> -Reviewed-by: Markus Wick <markus@selfnet.de> -(cherry picked from commit 55f5bfb578e934319d1308cbb56c900c5ac7cfa7) -Signed-off-by: Julien Cristau <jcristau@debian.org> ---- -diff --git a/glamor/glamor_render.c b/glamor/glamor_render.c -index 14ab738..e5d5d2c 100644 ---- a/glamor/glamor_render.c -+++ b/glamor/glamor_render.c -@@ -1450,8 +1450,8 @@ glamor_composite_clipped_region(CARD8 op, - || source_pixmap->drawable.height != height)))) { - temp_src = - glamor_convert_gradient_picture(screen, source, -- extent->x1 + x_source - x_dest, -- extent->y1 + y_source - y_dest, -+ extent->x1 + x_source - x_dest - dest->pDrawable->x, -+ extent->y1 + y_source - y_dest - dest->pDrawable->y, - width, height); - if (!temp_src) { - temp_src = source; -@@ -1459,8 +1459,8 @@ glamor_composite_clipped_region(CARD8 op, - } - temp_src_priv = - glamor_get_pixmap_private((PixmapPtr) (temp_src->pDrawable)); -- x_temp_src = -extent->x1 + x_dest; -- y_temp_src = -extent->y1 + y_dest; -+ x_temp_src = -extent->x1 + x_dest + dest->pDrawable->x; -+ y_temp_src = -extent->y1 + y_dest + dest->pDrawable->y; - } - - if (mask -@@ -1474,8 +1474,8 @@ glamor_composite_clipped_region(CARD8 op, - * to do reduce one convertion. */ - temp_mask = - glamor_convert_gradient_picture(screen, mask, -- extent->x1 + x_mask - x_dest, -- extent->y1 + y_mask - y_dest, -+ extent->x1 + x_mask - x_dest - dest->pDrawable->x, -+ extent->y1 + y_mask - y_dest - dest->pDrawable->y, - width, height); - if (!temp_mask) { - temp_mask = mask; -@@ -1483,8 +1483,8 @@ glamor_composite_clipped_region(CARD8 op, - } - temp_mask_priv = - glamor_get_pixmap_private((PixmapPtr) (temp_mask->pDrawable)); -- x_temp_mask = -extent->x1 + x_dest; -- y_temp_mask = -extent->y1 + y_dest; -+ x_temp_mask = -extent->x1 + x_dest + dest->pDrawable->x; -+ y_temp_mask = -extent->y1 + y_dest + dest->pDrawable->y; - } - /* Do two-pass PictOpOver componentAlpha, until we enable - * dual source color blending. --- -cgit v0.9.0.2-2-gbebe - |