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compositor-drm: Fully account for buffer transformation

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In our new and improved helper to determine the src/dest values for a
buffer on a given plane, make sure we account for all buffer
transformations, including viewport clipping.

Rather than badly open-coding it ourselves, just use the helper which
does exactly this.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reported-by: Tiago Gomes <tiago.gomes@codethink.co.uk>
Tested-by: Emre Ucan <eucan@de.adit-jv.com>
This commit is contained in:
Daniel Stone 2017-02-07 18:48:19 +00:00
parent d6e2a76a7c
commit df2726a089
1 changed files with 33 additions and 40 deletions
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73
libweston/compositor-drm.c
View file

@ -1206,10 +1206,10 @@ drm_plane_state_coords_for_view(struct drm_plane_state *state,
struct weston_view *ev)
{
struct drm_output *output = state->output;
struct weston_buffer_viewport *viewport = &ev->surface->buffer_viewport;
struct weston_buffer *buffer = ev->surface->buffer_ref.buffer;
pixman_region32_t dest_rect, src_rect;
pixman_box32_t *box, tbox;
wl_fixed_t sx1, sy1, sx2, sy2;
float sxf1, syf1, sxf2, syf2;
/* Update the base weston_plane co-ordinates. */
box = pixman_region32_extents(&ev->transform.boundingbox);
@ -1241,51 +1241,44 @@ drm_plane_state_coords_for_view(struct drm_plane_state *state,
pixman_region32_intersect(&src_rect, &ev->transform.boundingbox,
&output->base.region);
box = pixman_region32_extents(&src_rect);
weston_view_from_global_float(ev, box->x1, box->y1, &sxf1, &syf1);
weston_surface_to_buffer_float(ev->surface, sxf1, syf1, &sxf1, &syf1);
weston_view_from_global_float(ev, box->x2, box->y2, &sxf2, &syf2);
weston_surface_to_buffer_float(ev->surface, sxf2, syf2, &sxf2, &syf2);
pixman_region32_fini(&src_rect);
/* Accounting for any transformations made to this particular surface
* view, find the source rectangle to use. */
weston_view_from_global_fixed(ev,
wl_fixed_from_int(box->x1),
wl_fixed_from_int(box->y1),
&sx1, &sy1);
weston_view_from_global_fixed(ev,
wl_fixed_from_int(box->x2),
wl_fixed_from_int(box->y2),
&sx2, &sy2);
/* Buffer transforms may mean that x2 is to the left of x1, and/or that
* y2 is above y1. */
if (sxf2 < sxf1) {
double tmp = sxf1;
sxf1 = sxf2;
sxf2 = tmp;
}
if (syf2 < syf1) {
double tmp = syf1;
syf1 = syf2;
syf2 = tmp;
}
/* Shift from S23.8 wl_fixed to U16.16 KMS fixed-point encoding. */
state->src_x = wl_fixed_from_double(sxf1) << 8;
state->src_y = wl_fixed_from_double(syf1) << 8;
state->src_w = wl_fixed_from_double(sxf2 - sxf1) << 8;
state->src_h = wl_fixed_from_double(syf2 - syf1) << 8;
/* Clamp our source co-ordinates to surface bounds; it's possible
* for intermediate translations to give us slightly incorrect
* co-ordinates if we have, for example, multiple zooming
* transformations. View bounding boxes are also explicitly rounded
* greedily. */
if (sx1 < 0)
sx1 = 0;
if (sy1 < 0)
sy1 = 0;
if (sx2 > wl_fixed_from_int(ev->surface->width))
sx2 = wl_fixed_from_int(ev->surface->width);
if (sy2 > wl_fixed_from_int(ev->surface->height))
sy2 = wl_fixed_from_int(ev->surface->height);
tbox.x1 = sx1;
tbox.y1 = sy1;
tbox.x2 = sx2;
tbox.y2 = sy2;
pixman_region32_fini(&src_rect);
/* Apply viewport transforms in reverse, to get the source co-ordinates
* in buffer space. */
tbox = weston_transformed_rect(wl_fixed_from_int(ev->surface->width),
wl_fixed_from_int(ev->surface->height),
viewport->buffer.transform,
viewport->buffer.scale,
tbox);
/* Shift from S23.8 wl_fixed to U16.16 KMS fixed-point encoding. */
state->src_x = tbox.x1 << 8;
state->src_y = tbox.y1 << 8;
state->src_w = (tbox.x2 - tbox.x1) << 8;
state->src_h = (tbox.y2 - tbox.y1) << 8;
if (state->src_x < 0)
state->src_x = 0;
if (state->src_y < 0)
state->src_y = 0;
if (state->src_w > (uint32_t) ((buffer->width << 16) - state->src_x))
state->src_w = (buffer->width << 16) - state->src_x;
if (state->src_h > (uint32_t) ((buffer->height << 16) - state->src_y))
state->src_h = (buffer->height << 16) - state->src_y;
}
/**