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GUACAMOLE-249: Common surface should still pay attention to dirty flag, regardless of the new special case for unrealized surfaces.

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Michael Jumper 2020-01-06 11:15:00 -08:00
parent a54a12362c
commit 0677a9ae4d
1 changed files with 35 additions and 31 deletions
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66
src/common/surface.c
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@ -280,47 +280,51 @@ static int __guac_common_surface_is_opaque(guac_common_surface* surface,
*/
static int __guac_common_should_combine(guac_common_surface* surface, const guac_common_rect* rect, int rect_only) {
int combined_cost, dirty_cost, update_cost;
/* Always favor combining updates if surface is currently a purely
* server-side scratch area */
if (!surface->realized)
return 1;
/* Simulate combination */
guac_common_rect combined = surface->dirty_rect;
guac_common_rect_extend(&combined, rect);
if (surface->dirty) {
/* Combine if result is still small */
if (combined.width <= GUAC_SURFACE_NEGLIGIBLE_WIDTH && combined.height <= GUAC_SURFACE_NEGLIGIBLE_HEIGHT)
return 1;
int combined_cost, dirty_cost, update_cost;
/* Estimate costs of the existing update, new update, and both combined */
combined_cost = GUAC_SURFACE_BASE_COST + combined.width * combined.height;
dirty_cost = GUAC_SURFACE_BASE_COST + surface->dirty_rect.width * surface->dirty_rect.height;
update_cost = GUAC_SURFACE_BASE_COST + rect->width * rect->height;
/* Simulate combination */
guac_common_rect combined = surface->dirty_rect;
guac_common_rect_extend(&combined, rect);
/* Reduce cost if no image data */
if (rect_only)
update_cost /= GUAC_SURFACE_DATA_FACTOR;
/* Combine if cost estimate shows benefit */
if (combined_cost <= update_cost + dirty_cost)
return 1;
/* Combine if increase in cost is negligible */
if (combined_cost - dirty_cost <= dirty_cost / GUAC_SURFACE_NEGLIGIBLE_INCREASE)
return 1;
if (combined_cost - update_cost <= update_cost / GUAC_SURFACE_NEGLIGIBLE_INCREASE)
return 1;
/* Combine if we anticipate further updates, as this update follows a common fill pattern */
if (rect->x == surface->dirty_rect.x && rect->y == surface->dirty_rect.y + surface->dirty_rect.height) {
if (combined_cost <= (dirty_cost + update_cost) * GUAC_SURFACE_FILL_PATTERN_FACTOR)
/* Combine if result is still small */
if (combined.width <= GUAC_SURFACE_NEGLIGIBLE_WIDTH && combined.height <= GUAC_SURFACE_NEGLIGIBLE_HEIGHT)
return 1;
}
/* Estimate costs of the existing update, new update, and both combined */
combined_cost = GUAC_SURFACE_BASE_COST + combined.width * combined.height;
dirty_cost = GUAC_SURFACE_BASE_COST + surface->dirty_rect.width * surface->dirty_rect.height;
update_cost = GUAC_SURFACE_BASE_COST + rect->width * rect->height;
/* Reduce cost if no image data */
if (rect_only)
update_cost /= GUAC_SURFACE_DATA_FACTOR;
/* Combine if cost estimate shows benefit */
if (combined_cost <= update_cost + dirty_cost)
return 1;
/* Combine if increase in cost is negligible */
if (combined_cost - dirty_cost <= dirty_cost / GUAC_SURFACE_NEGLIGIBLE_INCREASE)
return 1;
if (combined_cost - update_cost <= update_cost / GUAC_SURFACE_NEGLIGIBLE_INCREASE)
return 1;
/* Combine if we anticipate further updates, as this update follows a common fill pattern */
if (rect->x == surface->dirty_rect.x && rect->y == surface->dirty_rect.y + surface->dirty_rect.height) {
if (combined_cost <= (dirty_cost + update_cost) * GUAC_SURFACE_FILL_PATTERN_FACTOR)
return 1;
}
}
/* Otherwise, do not combine */
return 0;