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drm: Get renderer buffer size from drm_fb 

The renderer buffer size is usually the same size as the current mode,
so we were taking the dimensions from the currently-set mode. However,
using current_mode is quite confusing in places when it comes to scale,
and it also hampers our ability to do mode switches, as well as to
introduce a future option which will let the renderer use a smaller
buffer than the output and display scaled.

Simply take the dimensions of the renderer's output buffer from the
buffer itself.

Signed-off-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Daniel Stone 2020-03-06 11:07:15 +00:00 committed by Pekka Paalanen
parent 98d75e1b23
commit f9a6162595
1 changed files with 4 additions and 4 deletions
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8
libweston/backend-drm/drm.c
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@ -391,13 +391,13 @@ drm_output_render(struct drm_output_state *state, pixman_region32_t *damage)
scanout_state->src_x = 0;
scanout_state->src_y = 0;
scanout_state->src_w = output->base.current_mode->width << 16;
scanout_state->src_h = output->base.current_mode->height << 16;
scanout_state->src_w = fb->width << 16;
scanout_state->src_h = fb->height << 16;
scanout_state->dest_x = 0;
scanout_state->dest_y = 0;
scanout_state->dest_w = scanout_state->src_w >> 16;
scanout_state->dest_h = scanout_state->src_h >> 16;
scanout_state->dest_w = output->base.current_mode->width;
scanout_state->dest_h = output->base.current_mode->height;
pixman_region32_copy(&scanout_state->damage, damage);
if (output->base.zoom.active) {