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Implemented naiive update condensing for PNGs in the simplest case. Added queue tail. Now adding to tail of queue.

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This commit is contained in:
Michael Jumper 2011-10-23 23:11:29 -07:00
parent 35fedc1eb6
commit 44a456aece
5 changed files with 2584 additions and 29 deletions
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7
libguac/include/client.h
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@ -164,6 +164,11 @@ struct guac_client {
*/
guac_layer* all_layers;
/**
* Pointer to a pre-allocated default layer (layer 0)
*/
guac_layer* default_layer;
/**
* The time (in milliseconds) of receipt of the last sync message from
* the client.
@ -373,6 +378,4 @@ guac_layer* guac_client_alloc_layer(guac_client* client, int index);
*/
void guac_client_free_buffer(guac_client* client, guac_layer* layer);
extern const guac_layer* GUAC_DEFAULT_LAYER;
#endif

5
libguac/include/protocol.h
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@ -245,6 +245,11 @@ struct guac_layer {
*/
guac_layer_update* update_queue_head;
/**
* The last element in this layer's update queue.
*/
guac_layer_update* update_queue_tail;
};
/**

17
libguac/src/client.c
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@ -47,15 +47,6 @@
#include "client.h"
#include "client-handlers.h"
guac_layer __GUAC_DEFAULT_LAYER = {
.index = 0,
.next = NULL,
.next_available = NULL
};
const guac_layer* GUAC_DEFAULT_LAYER = &__GUAC_DEFAULT_LAYER;
guac_client* __guac_alloc_client(GUACIO* io) {
/* Allocate new client (not handoff) */
@ -72,6 +63,9 @@ guac_client* __guac_alloc_client(GUACIO* io) {
client->next_buffer_index = -1;
/* Allocate default layer */
client->default_layer = guac_client_alloc_layer(client, 0);
return client;
}
@ -82,6 +76,7 @@ guac_layer* guac_client_alloc_layer(guac_client* client, int index) {
/* Init new layer */
allocd_layer = malloc(sizeof(guac_layer));
allocd_layer->update_queue_head = NULL;
allocd_layer->update_queue_tail = NULL;
/* Add to all_layers list */
allocd_layer->next = client->all_layers;
@ -110,6 +105,7 @@ guac_layer* guac_client_alloc_buffer(guac_client* client) {
allocd_layer = malloc(sizeof(guac_layer));
allocd_layer->index = client->next_buffer_index--;
allocd_layer->update_queue_head = NULL;
allocd_layer->update_queue_tail = NULL;
/* Add to all_layers list */
allocd_layer->next = client->all_layers;
@ -139,6 +135,9 @@ void guac_client_free_buffer(guac_client* client, guac_layer* layer) {
}
/* Queue is now empty */
layer->update_queue_tail = NULL;
}
guac_client* guac_get_client(int client_fd) {

156
libguac/src/protocol.c
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@ -63,6 +63,9 @@
#include "guacio.h"
#include "protocol.h"
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
ssize_t __guac_write_length_string(GUACIO* io, const char* str) {
return
@ -518,11 +521,17 @@ void guac_sleep(int millis) {
}
void _guac_layer_add_update(guac_layer* layer, guac_layer_update* update) {
void __guac_layer_add_update(guac_layer* layer, guac_layer_update* update) {
/* Add update to queue head */
update->next = layer->update_queue_head;
layer->update_queue_head = update;
/* Add update to queue tail */
if (layer->update_queue_tail != NULL)
layer->update_queue_tail = layer->update_queue_tail->next = update;
/* Set both head and tail if necessary */
else
layer->update_queue_tail = layer->update_queue_head = update;
update->next = NULL;
}
@ -539,9 +548,11 @@ void guac_layer_png(guac_layer* layer, guac_composite_mode_t mode,
update->dst_layer = layer;
update->dst_x = x;
update->dst_y = y;
update->width = cairo_image_surface_get_width(surface);
update->height = cairo_image_surface_get_height(surface);
/* Add to layer queue */
_guac_layer_add_update(layer, update);
__guac_layer_add_update(layer, update);
}
@ -565,7 +576,7 @@ void guac_layer_copy(guac_layer* layer, guac_composite_mode_t mode,
update->dst_y = dsty;
/* Add to layer queue */
_guac_layer_add_update(layer, update);
__guac_layer_add_update(layer, update);
}
@ -583,7 +594,7 @@ void guac_layer_clip(guac_layer* layer,
update->height = height;
/* Add to layer queue */
_guac_layer_add_update(layer, update);
__guac_layer_add_update(layer, update);
}
@ -607,7 +618,32 @@ void guac_layer_rect(guac_layer* layer, guac_composite_mode_t mode,
update->height = height;
/* Add to layer queue */
_guac_layer_add_update(layer, update);
__guac_layer_add_update(layer, update);
}
int __guac_layer_update_intersects(
const guac_layer_update* update1, const guac_layer_update* update2) {
/* If update1 X is within width of update2
or update2 X is within width of update1 */
if ((update1->dst_x >= update2->dst_x && update1->dst_x < update2->dst_x + update2->width)
|| (update2->dst_x >= update1->dst_x && update2->dst_x < update1->dst_x + update2->width)) {
/* If update1 Y is within height of update2
or update2 Y is within height of update1 */
if ((update1->dst_y >= update2->dst_y && update1->dst_y < update2->dst_y + update2->height)
|| (update2->dst_y >= update1->dst_y && update2->dst_y < update1->dst_y + update2->height)) {
/* Register instersection */
return 1;
}
}
/* Otherwise, no intersection */
return 0;
}
@ -615,6 +651,9 @@ int guac_layer_flush(guac_layer* layer, GUACIO* io) {
while (layer->update_queue_head != NULL) {
guac_layer_update* later_update;
int update_merged = 0;
/* Get next update, update queue head. */
guac_layer_update* update = layer->update_queue_head;
layer->update_queue_head = update->next;
@ -625,6 +664,103 @@ int guac_layer_flush(guac_layer* layer, GUACIO* io) {
/* "png" instruction */
case GUAC_LAYER_UPDATE_PNG:
/* Decide whether or not to send */
later_update = update->next;
while (later_update != NULL) {
/* If destination rectangles intersect */
if (__guac_layer_update_intersects(update, later_update)) {
cairo_surface_t* merged_surface;
cairo_t* cairo;
int merged_x, merged_y, merged_width, merged_height;
/* Cannot combine anything if intersection with non-PNG */
if (later_update->type != GUAC_LAYER_UPDATE_PNG)
break;
/* Cannot combine if modes differ */
if (later_update->mode != update->mode)
break;
/* For now, only combine for GUAC_COMP_OVER */
if (later_update->mode != GUAC_COMP_OVER)
break;
/* Calculate merged dimensions */
merged_x = MIN(update->dst_x, later_update->dst_x);
merged_y = MIN(update->dst_y, later_update->dst_y);
merged_width = MAX(
update->dst_x + update->width,
later_update->dst_x + later_update->width
) - merged_x;
merged_height = MAX(
update->dst_y + update->height,
later_update->dst_y + later_update->height
) - merged_y;
/* Create surface for merging */
merged_surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32, merged_width, merged_height);
/* Get drawing context */
cairo = cairo_create(merged_surface);
/* Draw first update within merged surface */
cairo_set_source_surface(cairo,
update->src_image,
update->dst_x - merged_x,
update->dst_y - merged_y);
cairo_rectangle(cairo,
update->dst_x - merged_x,
update->dst_y - merged_y,
update->width,
update->height);
cairo_fill(cairo);
/* Draw second update within merged surface */
cairo_set_source_surface(cairo,
later_update->src_image,
later_update->dst_x - merged_x,
later_update->dst_y - merged_y);
cairo_rectangle(cairo,
later_update->dst_x - merged_x,
later_update->dst_y - merged_y,
later_update->width,
later_update->height);
cairo_fill(cairo);
/* Done drawing */
cairo_destroy(cairo);
/* Alter update dimensions */
later_update->dst_x = merged_x;
later_update->dst_y = merged_y;
later_update->width = merged_width;
later_update->height = merged_height;
/* Alter update to include merged data*/
cairo_surface_destroy(later_update->src_image);
later_update->src_image = merged_surface;
update_merged = 1;
break;
}
/* Get next update */
later_update = later_update->next;
}
/* Send instruction if update was not merged */
if (!update_merged) {
if (guac_send_png(io,
update->mode,
update->dst_layer,
@ -636,6 +772,7 @@ int guac_layer_flush(guac_layer* layer, GUACIO* io) {
free(update);
return -1;
}
}
cairo_surface_destroy(update->src_image);
break;
@ -704,6 +841,9 @@ int guac_layer_flush(guac_layer* layer, GUACIO* io) {
}
/* Queue is now empty */
layer->update_queue_tail = NULL;
return 0;
}

2408
libguac/test Normal file
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