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GUAC-674: Inspect and re-inspect queue when combining.

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This commit is contained in:
Michael Jumper 2014-05-09 18:45:10 -07:00
parent 7fc3fe1fdc
commit 78d7c3e9ab
2 changed files with 50 additions and 20 deletions
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65
src/common/guac_surface.c
View File

@ -29,7 +29,6 @@
#include <guacamole/socket.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
@ -252,6 +251,7 @@ static void __guac_common_surface_flush_to_queue(guac_common_surface* surface) {
rect->y = surface->dirty_y;
rect->width = surface->dirty_width;
rect->height = surface->dirty_height;
rect->flushed = 0;
/* Surface now flushed */
surface->dirty = 0;
@ -822,8 +822,8 @@ static int __guac_common_surface_png_rect_compare(const void* a, const void* b)
guac_common_surface_png_rect* rb = (guac_common_surface_png_rect*) b;
/* Order roughly top to bottom, left to right */
if (ra->y >> 6 != rb->y >> 6) return ra->y - rb->y;
if (ra->x != rb->x) return ra->x - rb->x;
if (ra->y != rb->y) return ra->y - rb->y;
if (ra->x != rb->x) return ra->x - rb->x;
/* Wider updates should come first (more likely to intersect later) */
if (ra->width != rb->width) return rb->width - ra->width;
@ -837,11 +837,13 @@ void guac_common_surface_flush(guac_common_surface* surface) {
guac_common_surface_png_rect* current = surface->png_queue;
int i;
int i, j;
int original_queue_length;
int flushed = 0;
/* Flush final dirty rect to queue */
__guac_common_surface_flush_to_queue(surface);
original_queue_length = surface->png_queue_length;
/* Sort updates to make combination less costly */
qsort(surface->png_queue, surface->png_queue_length, sizeof(guac_common_surface_png_rect),
@ -850,30 +852,53 @@ void guac_common_surface_flush(guac_common_surface* surface) {
/* Flush all rects in queue */
for (i=0; i < surface->png_queue_length; i++) {
int x = current->x;
int y = current->y;
int w = current->width;
int h = current->height;
/* Get next unflushed candidate */
guac_common_surface_png_rect* candidate = current;
if (!candidate->flushed) {
int combined = 0;
/* Build up rect as much as possible */
for (j=i; j < surface->png_queue_length; j++) {
if (!candidate->flushed) {
int x = candidate->x;
int y = candidate->y;
int w = candidate->width;
int h = candidate->height;
/* Combine if reasonable */
if (__guac_common_should_combine(surface, x, y, w, h, 0) || !surface->dirty) {
__guac_common_mark_dirty(surface, x, y, w, h);
candidate->flushed = 1;
combined++;
}
}
candidate++;
}
/* Re-add to queue if there's room and this update was modified or we expect others might be */
if ((combined > 1 || i < original_queue_length)
&& surface->png_queue_length < GUAC_COMMON_SURFACE_QUEUE_SIZE)
__guac_common_surface_flush_to_queue(surface);
/* Flush as PNG otherwise */
else {
if (surface->dirty) flushed++;
__guac_common_surface_flush_to_png(surface);
}
/* Flush if not combining */
if (!__guac_common_should_combine(surface, x, y, w, h, 0)) {
if (surface->dirty) flushed++;
__guac_common_surface_flush_to_png(surface);
}
/* Defer, attempt to combine with next rect */
__guac_common_mark_dirty(surface, x, y, w, h);
current++;
}
/* Flush the final png */
if (surface->dirty) flushed++;
__guac_common_surface_flush_to_png(surface);
/* Flush complete */
if (flushed < surface->png_queue_length)
fprintf(stderr, "IMPROVEMENT: Flushed %i (originally %i) updates.\n", flushed, surface->png_queue_length);
surface->png_queue_length = 0;
}

5
src/common/guac_surface.h
View File

@ -42,6 +42,11 @@
*/
typedef struct guac_common_surface_png_rect {
/**
* Whether this rectangle has been flushed.
*/
int flushed;
/**
* The X coordinate of the upper-left corner of this rectangle.
*/