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GUAC-240: Restore flush to PNG. Simplify handling of flush. Remove lossy pipeline.

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This commit is contained in:
Michael Jumper 2015-08-17 01:27:09 -07:00
parent 807e3a39a5
commit 26f9070d99
2 changed files with 32 additions and 256 deletions
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272
src/common/guac_surface.c
View File

@ -261,182 +261,7 @@ static void __guac_common_mark_dirty(guac_common_surface* surface, const guac_co
}
/**
* Actual method which flushes a bitmap described by the dirty rectangle
* on the socket associated with the surface.
*
* The bitmap will be sent as a "jpeg" or "png" instruction based on the lossy
* flag. Certain conditions may override the lossy flag and send a lossless
* update.
*
* @param surface
* The surface whose dirty area will be flushed.
*
* @param dirty_rect
* The dirty rectangle.
*
* @param lossy
* Flag indicating whether this refresh should be lossy.
*/
static void __guac_common_surface_flush_to_bitmap_impl(guac_common_surface* surface,
guac_common_rect* dirty_rect, int lossy) {
guac_socket* socket = surface->socket;
const guac_layer* layer = surface->layer;
int send_jpeg = 0;
/* Set the JPEG flag indicating whether this bitmap should be sent as JPEG.
* Only send as a JPEG if the dirty is larger than the minimum JPEG bitmap
* size to avoid the JPEG image compression tax. */
if (lossy &&
(dirty_rect->width * dirty_rect->height) > GUAC_SURFACE_JPEG_MIN_BITMAP_SIZE) {
/* Check the smoothness of the dirty rectangle. If smooth, do not send
* a JPEG as it has a higher overhead than standard PNG. */
if (!guac_common_surface_rect_is_smooth(surface, dirty_rect)) {
send_jpeg = 1;
/* Tweak the rectangle if it is to be sent as JPEG so the size
* matches the JPEG block size. */
guac_common_rect max;
guac_common_rect_init(&max, 0, 0, surface->width, surface->height);
guac_common_rect_expand_to_grid(GUAC_SURFACE_JPEG_BLOCK_SIZE,
dirty_rect, &max);
}
}
/* Get Cairo surface for specified rect.
* The buffer is created with 4 bytes per pixel because Cairo's 24 bit RGB
* really is 32 bit BGRx */
unsigned char* buffer = surface->buffer + dirty_rect->y * surface->stride + dirty_rect->x * 4;
cairo_surface_t* rect = cairo_image_surface_create_for_data(buffer, CAIRO_FORMAT_RGB24,
dirty_rect->width,
dirty_rect->height,
surface->stride);
/* Send bitmap update for the dirty rectangle */
if (send_jpeg) {
guac_client_stream_jpeg(surface->client, socket, GUAC_COMP_OVER, layer,
dirty_rect->x, dirty_rect->y, rect,
GUAC_SURFACE_JPEG_IMAGE_QUALITY);
}
else {
guac_client_stream_png(surface->client, socket, GUAC_COMP_OVER, layer,
dirty_rect->x, dirty_rect->y, rect);
}
cairo_surface_destroy(rect);
}
/**
* Flushes the rectangle to the given surface's bitmap queue. There MUST be
* space within the queue.
*
* @param surface The surface queue to flush to.
* @param rect The rectangle to flush.
*/
static void __guac_common_surface_flush_rect_to_queue(guac_common_surface* surface,
const guac_common_rect* rect) {
guac_common_surface_bitmap_rect* bitmap_rect;
/* Add new rect to queue */
bitmap_rect = &(surface->bitmap_queue[surface->bitmap_queue_length++]);
bitmap_rect->rect = *rect;
bitmap_rect->flushed = 0;
}
/**
* Flushes the bitmap update currently described by a lossy rectangle within the
* given surface.
*
* Scans through the regular bitmap update queue and excludes any rectangles
* covered by the lossy rectangle.
*
* @param surface
* The surface whose lossy area will be flushed.
*/
static void __guac_common_surface_flush_lossy_bitmap(
guac_common_surface* surface) {
if (surface->lossy_dirty) {
guac_common_surface_bitmap_rect* current = surface->bitmap_queue;
int original_queue_length = surface->bitmap_queue_length;
/* Identify all bitmaps in queue which are
* covered by the lossy rectangle. */
for (int i=0; i < original_queue_length; i++) {
int intersects = guac_common_rect_intersects(&current->rect,
&surface->lossy_dirty_rect);
/* Complete intersection. */
if (intersects == 2) {
/* Exclude this from the normal refresh as it is completely
* covered by the lossy dirty rectangle. */
current->flushed = 1;
}
/* Partial intersection.
* The rectangle will be split if there is room on the queue. */
else if (intersects == 1 &&
surface->bitmap_queue_length < GUAC_COMMON_SURFACE_QUEUE_SIZE-5) {
/* Clip and split rectangle into rectangles that are outside the
* lossy rectangle which are added to the normal refresh queue.
* The remaining rectangle which overlaps with the lossy
* rectangle is marked flushed to not be refreshed in the normal
* refresh cycle.
*/
guac_common_rect split_rect;
while (guac_common_rect_clip_and_split(&current->rect,
&surface->lossy_dirty_rect, &split_rect)) {
/* Add new rectangle to update queue */
__guac_common_surface_flush_rect_to_queue(surface,
&split_rect);
}
/* Exclude the remaining part of the dirty rectangle
* which is completely covered by the lossy dirty rectangle. */
current->flushed = 1;
}
current++;
}
/* Flush the lossy bitmap */
__guac_common_surface_flush_to_bitmap_impl(surface,
&surface->lossy_dirty_rect, 1);
/* Flag this area as lossy so it can be moved back to the
* dirty rect and refreshed normally when refreshed less frequently. */
int x = surface->lossy_dirty_rect.x;
int y = surface->lossy_dirty_rect.y;
int w = (x + surface->lossy_dirty_rect.width) / GUAC_COMMON_SURFACE_HEAT_MAP_CELL;
int h = (y + surface->lossy_dirty_rect.height) / GUAC_COMMON_SURFACE_HEAT_MAP_CELL;
x /= GUAC_COMMON_SURFACE_HEAT_MAP_CELL;
y /= GUAC_COMMON_SURFACE_HEAT_MAP_CELL;
for (int j = y; j <= h; j++) {
for (int i = x; i <= w; i++) {
surface->lossy_rect[j][i] = 1;
}
}
/* Clear the lossy dirty flag. */
surface->lossy_dirty = 0;
}
}
#if 0
/**
* Calculate the current average refresh frequency for a given area on the
* surface.
@ -510,6 +335,7 @@ static unsigned int __guac_common_surface_calculate_framerate(
return 0;
}
#endif
/**
* Touch the heat map with this update rectangle, so that the update
@ -558,35 +384,6 @@ static void __guac_common_surface_touch_rect(guac_common_surface* surface,
}
/**
* Expands the lossy dirty rectangle of the given surface to contain the
* rectangle described by the given coordinates.
*
* @param surface
* The surface to mark as dirty.
*
* @param rect
* The rectangle of the update which is dirtying the surface.
*/
static void __guac_common_mark_lossy_dirty(guac_common_surface* surface,
const guac_common_rect* rect) {
/* Ignore empty rects */
if (rect->width <= 0 || rect->height <= 0)
return;
/* If already dirty, update existing rect */
if (surface->lossy_dirty) {
guac_common_rect_extend(&surface->lossy_dirty_rect, rect);
}
/* Otherwise init lossy dirty rect */
else {
surface->lossy_dirty_rect = *rect;
surface->lossy_dirty = 1;
}
}
/**
* Flushes the bitmap update currently described by the dirty rectangle within the
* given surface to that surface's bitmap queue. There MUST be space within the
@ -596,15 +393,20 @@ static void __guac_common_mark_lossy_dirty(guac_common_surface* surface,
*/
static void __guac_common_surface_flush_to_queue(guac_common_surface* surface) {
guac_common_surface_bitmap_rect* rect;
/* Do not flush if not dirty */
if (!surface->dirty)
return;
/* Add new rect to queue */
__guac_common_surface_flush_rect_to_queue(surface, &surface->dirty_rect);
rect = &(surface->bitmap_queue[surface->bitmap_queue_length++]);
rect->rect = surface->dirty_rect;
rect->flushed = 0;
/* Surface now flushed */
surface->dirty = 0;
}
void guac_common_surface_flush_deferred(guac_common_surface* surface) {
@ -1132,30 +934,16 @@ void guac_common_surface_draw(guac_common_surface* surface, int x, int y, cairo_
if (rect.width <= 0 || rect.height <= 0)
return;
unsigned int freq = 0;
/* Update the heat map for the update rectangle. */
guac_timestamp time = guac_timestamp_current();
__guac_common_surface_touch_rect(surface, &rect, time);
/* Calculate the average framerate for this rectangle. */
freq = __guac_common_surface_calculate_framerate(surface, &rect);
/* Flush if not combining */
if (!__guac_common_should_combine(surface, &rect, 0))
guac_common_surface_flush_deferred(surface);
/* If this rectangle is hot, mark lossy dirty rectangle. */
if (freq >= GUAC_COMMON_SURFACE_LOSSY_REFRESH_FREQUENCY) {
__guac_common_mark_lossy_dirty(surface, &rect);
}
/* Standard refresh path */
else {
/* Flush if not combining */
if (!__guac_common_should_combine(surface, &rect, 0))
guac_common_surface_flush_deferred(surface);
/* Always defer draws */
__guac_common_mark_dirty(surface, &rect);
}
/* Always defer draws */
__guac_common_mark_dirty(surface, &rect);
}
@ -1325,25 +1113,32 @@ void guac_common_surface_reset_clip(guac_common_surface* surface) {
}
/**
* Flushes the bitmap update currently described by the dirty rectangle within the
* Flushes the bitmap update currently described by the dirty rectangle within
* the given surface directly via an "img" instruction as PNG data. The
* resulting instructions will be sent over the socket associated with the
* given surface.
*
* @param surface The surface to flush.
* @param surface
* The surface to flush.
*/
static void __guac_common_surface_flush_to_bitmap(guac_common_surface* surface) {
static void __guac_common_surface_flush_to_png(guac_common_surface* surface) {
if (surface->dirty) {
guac_common_rect dirty_rect;
guac_common_rect_init(&dirty_rect,
surface->dirty_rect.x,
surface->dirty_rect.y,
surface->dirty_rect.width,
surface->dirty_rect.height);
guac_socket* socket = surface->socket;
const guac_layer* layer = surface->layer;
/* Flush bitmap */
__guac_common_surface_flush_to_bitmap_impl(surface, &dirty_rect, 0);
/* Get Cairo surface for specified rect */
unsigned char* buffer = surface->buffer + surface->dirty_rect.y * surface->stride + surface->dirty_rect.x * 4;
cairo_surface_t* rect = cairo_image_surface_create_for_data(buffer, CAIRO_FORMAT_RGB24,
surface->dirty_rect.width,
surface->dirty_rect.height,
surface->stride);
/* Send PNG for rect */
guac_client_stream_png(surface->client, socket, GUAC_COMP_OVER, layer,
surface->dirty_rect.x, surface->dirty_rect.y, rect);
cairo_surface_destroy(rect);
surface->realized = 1;
/* Surface is no longer dirty */
@ -1381,9 +1176,6 @@ void guac_common_surface_flush(guac_common_surface* surface) {
/* Flush final dirty rectangle to queue. */
__guac_common_surface_flush_to_queue(surface);
/* Flush the lossy bitmap to client. */
__guac_common_surface_flush_lossy_bitmap(surface);
guac_common_surface_bitmap_rect* current = surface->bitmap_queue;
int i, j;
int original_queue_length;
@ -1435,7 +1227,7 @@ void guac_common_surface_flush(guac_common_surface* surface) {
/* Flush as bitmap otherwise */
else {
if (surface->dirty) flushed++;
__guac_common_surface_flush_to_bitmap(surface);
__guac_common_surface_flush_to_png(surface);
}
}

16
src/common/guac_surface.h
View File

@ -198,22 +198,6 @@ typedef struct guac_common_surface {
*/
guac_common_surface_heat_rect heat_map[GUAC_COMMON_SURFACE_HEAT_MAP_ROWS][GUAC_COMMON_SURFACE_HEAT_MAP_COLS];
/*
* Map of areas currently refreshed lossy.
*/
int lossy_rect[GUAC_COMMON_SURFACE_HEAT_MAP_ROWS][GUAC_COMMON_SURFACE_HEAT_MAP_COLS];
/**
* Non-zero if this surface's lossy area is dirty and needs to be flushed,
* 0 otherwise.
*/
int lossy_dirty;
/**
* The lossy area's dirty rectangle.
*/
guac_common_rect lossy_dirty_rect;
} guac_common_surface;
/**