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GUAC-236: Split massive display code into more reasonable files.

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This commit is contained in:
Michael Jumper 2016-02-28 15:45:04 -08:00
parent a24152df02
commit 960ee263e8
9 changed files with 566 additions and 385 deletions
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51
src/guacenc/Makefile.am
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@ -35,29 +35,34 @@ noinst_HEADERS = \
log.h \ log.h \
png.h png.h
guacenc_SOURCES = \ guacenc_SOURCES = \
buffer.c \ buffer.c \
display.c \ display.c \
encode.c \ display-buffers.c \
guacenc.c \ display-image-streams.c \
image-stream.c \ display-flatten.c \
instructions.c \ display-layers.c \
instruction-blob.c \ display-sync.c \
instruction-cfill.c \ encode.c \
instruction-copy.c \ guacenc.c \
instruction-cursor.c \ image-stream.c \
instruction-dispose.c \ instructions.c \
instruction-end.c \ instruction-blob.c \
instruction-img.c \ instruction-cfill.c \
instruction-move.c \ instruction-copy.c \
instruction-rect.c \ instruction-cursor.c \
instruction-shade.c \ instruction-dispose.c \
instruction-size.c \ instruction-end.c \
instruction-sync.c \ instruction-img.c \
instruction-transfer.c \ instruction-move.c \
jpeg.c \ instruction-rect.c \
layer.c \ instruction-shade.c \
log.c \ instruction-size.c \
instruction-sync.c \
instruction-transfer.c \
jpeg.c \
layer.c \
log.c \
png.c png.c
# Compile WebP support if available # Compile WebP support if available

1
src/guacenc/buffer.c
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@ -26,7 +26,6 @@
#include <cairo/cairo.h> #include <cairo/cairo.h>
#include <assert.h> #include <assert.h>
#include <stdbool.h>
#include <stdlib.h> #include <stdlib.h>
guacenc_buffer* guacenc_buffer_alloc() { guacenc_buffer* guacenc_buffer_alloc() {

110
src/guacenc/display-buffers.c Normal file
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@ -0,0 +1,110 @@
/*
* Copyright (C) 2016 Glyptodon, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "display.h"
#include "buffer.h"
#include "layer.h"
#include "log.h"
#include <guacamole/client.h>
#include <stdlib.h>
guacenc_buffer* guacenc_display_get_buffer(guacenc_display* display,
int index) {
/* Transform index to buffer space */
int internal_index = -index - 1;
/* Do not lookup / allocate if index is invalid */
if (internal_index < 0 || internal_index > GUACENC_DISPLAY_MAX_BUFFERS) {
guacenc_log(GUAC_LOG_WARNING, "Buffer index out of bounds: %i", index);
return NULL;
}
/* Lookup buffer, allocating a new buffer if necessary */
guacenc_buffer* buffer = display->buffers[internal_index];
if (buffer == NULL) {
/* Attempt to allocate buffer */
buffer = guacenc_buffer_alloc();
if (buffer == NULL) {
guacenc_log(GUAC_LOG_WARNING, "Buffer allocation failed");
return NULL;
}
/* All non-layer buffers must autosize */
buffer->autosize = true;
/* Store buffer within display for future retrieval / management */
display->buffers[internal_index] = buffer;
}
return buffer;
}
int guacenc_display_free_buffer(guacenc_display* display,
int index) {
/* Transform index to buffer space */
int internal_index = -index - 1;
/* Do not lookup / allocate if index is invalid */
if (internal_index < 0 || internal_index > GUACENC_DISPLAY_MAX_BUFFERS) {
guacenc_log(GUAC_LOG_WARNING, "Buffer index out of bounds: %i", index);
return 1;
}
/* Free buffer (if allocated) */
guacenc_buffer_free(display->buffers[internal_index]);
/* Mark buffer as freed */
display->buffers[internal_index] = NULL;
return 0;
}
guacenc_buffer* guacenc_display_get_related_buffer(guacenc_display* display,
int index) {
/* Retrieve underlying buffer of layer if a layer is requested */
if (index >= 0) {
/* Retrieve / allocate layer (if possible */
guacenc_layer* layer = guacenc_display_get_layer(display, index);
if (layer == NULL)
return NULL;
/* Return underlying buffer */
return layer->buffer;
}
/* Otherwise retrieve buffer directly */
return guacenc_display_get_buffer(display, index);
}

160
src/guacenc/display-flatten.c Normal file
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@ -0,0 +1,160 @@
/*
* Copyright (C) 2016 Glyptodon, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "display.h"
#include "layer.h"
#include <cairo/cairo.h>
#include <stdlib.h>
#include <string.h>
/**
* The Guacamole video encoder display related to the current qsort()
* operation. As qsort() does not provide a means of passing arbitrary data to
* the comparitor, this value must be set prior to invoking qsort() with
* guacenc_display_layer_comparator.
*/
guacenc_display* __qsort_display;
/**
* Comparator which orders layer pointers such that (1) NULL pointers are last,
* (2) layers with the same parent_index are adjacent, and (3) layers with the
* same parent_index are ordered by Z.
*
* @see qsort()
*/
static int guacenc_display_layer_comparator(const void* a, const void* b) {
guacenc_layer* layer_a = *((guacenc_layer**) a);
guacenc_layer* layer_b = *((guacenc_layer**) b);
/* If a is NULL, sort it to bottom */
if (layer_a == NULL) {
/* ... unless b is also NULL, in which case they are equal */
if (layer_b == NULL)
return 0;
return 1;
}
/* If b is NULL (and a is not NULL), sort it to bottom */
if (layer_b == NULL)
return -1;
/* Order such that the deepest layers are first */
int a_depth = guacenc_display_get_depth(__qsort_display, layer_a);
int b_depth = guacenc_display_get_depth(__qsort_display, layer_b);
if (b_depth != a_depth)
return b_depth - a_depth;
/* Order such that sibling layers are adjacent */
if (layer_b->parent_index != layer_a->parent_index)
return layer_b->parent_index - layer_a->parent_index;
/* Order sibling layers according to descending Z */
return layer_b->z - layer_a->z;
}
int guacenc_display_flatten(guacenc_display* display) {
int i;
guacenc_layer* render_order[GUACENC_DISPLAY_MAX_LAYERS];
/* Copy list of layers within display */
memcpy(render_order, display->layers, sizeof(render_order));
/* Sort layers by depth, parent, and Z */
__qsort_display = display;
qsort(render_order, GUACENC_DISPLAY_MAX_LAYERS, sizeof(guacenc_layer*),
guacenc_display_layer_comparator);
/* Reset layer frame buffers */
for (i = 0; i < GUACENC_DISPLAY_MAX_LAYERS; i++) {
/* Pull current layer, ignoring unallocated layers */
guacenc_layer* layer = render_order[i];
if (layer == NULL)
continue;
/* Get source buffer and destination frame buffer */
guacenc_buffer* buffer = layer->buffer;
guacenc_buffer* frame = layer->frame;
/* Reset frame contents */
guacenc_buffer_copy(frame, buffer);
}
/* Render each layer, in order */
for (i = 0; i < GUACENC_DISPLAY_MAX_LAYERS; i++) {
/* Pull current layer, ignoring unallocated layers */
guacenc_layer* layer = render_order[i];
if (layer == NULL)
continue;
/* Skip fully-transparent layers */
if (layer->opacity == 0)
continue;
/* Ignore layers without a parent */
int parent_index = layer->parent_index;
if (parent_index == GUACENC_LAYER_NO_PARENT)
continue;
/* Retrieve parent layer, ignoring layers with invalid parents */
guacenc_layer* parent = guacenc_display_get_layer(display, parent_index);
if (parent == NULL)
continue;
/* Get source and destination frame buffer */
guacenc_buffer* src = layer->frame;
guacenc_buffer* dst = parent->frame;
/* Ignore layers with empty buffers */
cairo_surface_t* surface = src->surface;
if (surface == NULL)
continue;
/* Ignore if parent has no pixels */
cairo_t* cairo = dst->cairo;
if (cairo == NULL)
continue;
/* Render buffer to layer */
cairo_reset_clip(cairo);
cairo_rectangle(cairo, layer->x, layer->y, src->width, src->height);
cairo_clip(cairo);
cairo_set_source_surface(cairo, surface, layer->x, layer->y);
cairo_paint_with_alpha(cairo, layer->opacity / 255.0);
}
return 0;
}

84
src/guacenc/display-image-streams.c Normal file
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@ -0,0 +1,84 @@
/*
* Copyright (C) 2016 Glyptodon, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "display.h"
#include "image-stream.h"
#include "log.h"
#include <guacamole/client.h>
#include <stdlib.h>
int guacenc_display_create_image_stream(guacenc_display* display, int index,
int mask, int layer_index, const char* mimetype, int x, int y) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_STREAMS) {
guacenc_log(GUAC_LOG_WARNING, "Stream index out of bounds: %i", index);
return 1;
}
/* Free existing stream (if any) */
guacenc_image_stream_free(display->image_streams[index]);
/* Associate new stream */
guacenc_image_stream* stream = display->image_streams[index] =
guacenc_image_stream_alloc(mask, layer_index, mimetype, x, y);
/* Return zero only if stream is not NULL */
return stream == NULL;
}
guacenc_image_stream* guacenc_display_get_image_stream(
guacenc_display* display, int index) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_STREAMS) {
guacenc_log(GUAC_LOG_WARNING, "Stream index out of bounds: %i", index);
return NULL;
}
/* Return existing stream (if any) */
return display->image_streams[index];
}
int guacenc_display_free_image_stream(guacenc_display* display, int index) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_STREAMS) {
guacenc_log(GUAC_LOG_WARNING, "Stream index out of bounds: %i", index);
return 1;
}
/* Free stream (if allocated) */
guacenc_image_stream_free(display->image_streams[index]);
/* Mark stream as freed */
display->image_streams[index] = NULL;
return 0;
}

102
src/guacenc/display-layers.c Normal file
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@ -0,0 +1,102 @@
/*
* Copyright (C) 2016 Glyptodon, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "display.h"
#include "layer.h"
#include "log.h"
#include <guacamole/client.h>
#include <stdlib.h>
guacenc_layer* guacenc_display_get_layer(guacenc_display* display,
int index) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_LAYERS) {
guacenc_log(GUAC_LOG_WARNING, "Layer index out of bounds: %i", index);
return NULL;
}
/* Lookup layer, allocating a new layer if necessary */
guacenc_layer* layer = display->layers[index];
if (layer == NULL) {
/* Attempt to allocate layer */
layer = guacenc_layer_alloc();
if (layer == NULL) {
guacenc_log(GUAC_LOG_WARNING, "Layer allocation failed");
return NULL;
}
/* The default layer has no parent */
if (index == 0)
layer->parent_index = GUACENC_LAYER_NO_PARENT;
/* Store layer within display for future retrieval / management */
display->layers[index] = layer;
}
return layer;
}
int guacenc_display_get_depth(guacenc_display* display, guacenc_layer* layer) {
/* Non-existent layers have a depth of 0 */
if (layer == NULL)
return 0;
/* Layers with no parent have a depth of 0 */
if (layer->parent_index == GUACENC_LAYER_NO_PARENT)
return 0;
/* Retrieve parent layer */
guacenc_layer* parent =
guacenc_display_get_layer(display, layer->parent_index);
/* Current layer depth is the depth of the parent + 1 */
return guacenc_display_get_depth(display, parent) + 1;
}
int guacenc_display_free_layer(guacenc_display* display,
int index) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_LAYERS) {
guacenc_log(GUAC_LOG_WARNING, "Layer index out of bounds: %i", index);
return 1;
}
/* Free layer (if allocated) */
guacenc_layer_free(display->layers[index]);
/* Mark layer as freed */
display->layers[index] = NULL;
return 0;
}

66
src/guacenc/display-sync.c Normal file
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@ -0,0 +1,66 @@
/*
* Copyright (C) 2016 Glyptodon, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "display.h"
#include "layer.h"
#include "log.h"
#include <cairo/cairo.h>
#include <guacamole/client.h>
#include <guacamole/timestamp.h>
#include <assert.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
int guacenc_display_sync(guacenc_display* display, guac_timestamp timestamp) {
/* Verify timestamp is not decreasing */
if (timestamp < display->last_sync) {
guacenc_log(GUAC_LOG_WARNING, "Decreasing sync timestamp");
return 1;
}
/* Update timestamp of display */
display->last_sync = timestamp;
/* Flatten display to default layer */
if (guacenc_display_flatten(display))
return 1;
/* Retrieve default layer (guaranteed to not be NULL) */
guacenc_layer* def_layer = guacenc_display_get_layer(display, 0);
assert(def_layer != NULL);
/* STUB: Write frame as PNG */
char filename[256];
sprintf(filename, "frame-%" PRId64 ".png", timestamp);
cairo_surface_t* surface = def_layer->frame->surface;
if (surface != NULL)
cairo_surface_write_to_png(surface, filename);
return 0;
}

361
src/guacenc/display.c
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@ -22,371 +22,10 @@
#include "config.h" #include "config.h"
#include "display.h" #include "display.h"
#include "layer.h"
#include "log.h"
#include <cairo/cairo.h> #include <cairo/cairo.h>
#include <guacamole/client.h>
#include <guacamole/protocol.h>
#include <guacamole/timestamp.h>
#include <assert.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
/**
* The Guacamole video encoder display related to the current qsort()
* operation. As qsort() does not provide a means of passing arbitrary data to
* the comparitor, this value must be set prior to invoking qsort() with
* guacenc_display_layer_comparator.
*/
guacenc_display* __qsort_display;
/**
* Comparator which orders layer pointers such that (1) NULL pointers are last,
* (2) layers with the same parent_index are adjacent, and (3) layers with the
* same parent_index are ordered by Z.
*
* @see qsort()
*/
static int guacenc_display_layer_comparator(const void* a, const void* b) {
guacenc_layer* layer_a = *((guacenc_layer**) a);
guacenc_layer* layer_b = *((guacenc_layer**) b);
/* If a is NULL, sort it to bottom */
if (layer_a == NULL) {
/* ... unless b is also NULL, in which case they are equal */
if (layer_b == NULL)
return 0;
return 1;
}
/* If b is NULL (and a is not NULL), sort it to bottom */
if (layer_b == NULL)
return -1;
/* Order such that the deepest layers are first */
int a_depth = guacenc_display_get_depth(__qsort_display, layer_a);
int b_depth = guacenc_display_get_depth(__qsort_display, layer_b);
if (b_depth != a_depth)
return b_depth - a_depth;
/* Order such that sibling layers are adjacent */
if (layer_b->parent_index != layer_a->parent_index)
return layer_b->parent_index - layer_a->parent_index;
/* Order sibling layers according to descending Z */
return layer_b->z - layer_a->z;
}
int guacenc_display_sync(guacenc_display* display, guac_timestamp timestamp) {
/* Verify timestamp is not decreasing */
if (timestamp < display->last_sync) {
guacenc_log(GUAC_LOG_WARNING, "Decreasing sync timestamp");
return 1;
}
/* Update timestamp of display */
display->last_sync = timestamp;
int i;
guacenc_layer* render_order[GUACENC_DISPLAY_MAX_LAYERS];
/* Copy list of layers within display */
memcpy(render_order, display->layers, sizeof(render_order));
/* Sort layers by depth, parent, and Z */
__qsort_display = display;
qsort(render_order, GUACENC_DISPLAY_MAX_LAYERS, sizeof(guacenc_layer*),
guacenc_display_layer_comparator);
/* Reset layer frame buffers */
for (i = 0; i < GUACENC_DISPLAY_MAX_LAYERS; i++) {
/* Pull current layer, ignoring unallocated layers */
guacenc_layer* layer = render_order[i];
if (layer == NULL)
continue;
/* Get source buffer and destination frame buffer */
guacenc_buffer* buffer = layer->buffer;
guacenc_buffer* frame = layer->frame;
/* Reset frame contents */
guacenc_buffer_copy(frame, buffer);
}
/* Render each layer, in order */
for (i = 0; i < GUACENC_DISPLAY_MAX_LAYERS; i++) {
/* Pull current layer, ignoring unallocated layers */
guacenc_layer* layer = render_order[i];
if (layer == NULL)
continue;
/* Skip fully-transparent layers */
if (layer->opacity == 0)
continue;
/* Ignore layers without a parent */
int parent_index = layer->parent_index;
if (parent_index == GUACENC_LAYER_NO_PARENT)
continue;
/* Retrieve parent layer, ignoring layers with invalid parents */
guacenc_layer* parent = guacenc_display_get_layer(display, parent_index);
if (parent == NULL)
continue;
/* Get source and destination frame buffer */
guacenc_buffer* src = layer->frame;
guacenc_buffer* dst = parent->frame;
/* Ignore layers with empty buffers */
cairo_surface_t* surface = src->surface;
if (surface == NULL)
continue;
/* Ignore if parent has no pixels */
cairo_t* cairo = dst->cairo;
if (cairo == NULL)
continue;
/* Render buffer to layer */
cairo_reset_clip(cairo);
cairo_rectangle(cairo, layer->x, layer->y, src->width, src->height);
cairo_clip(cairo);
cairo_set_source_surface(cairo, surface, layer->x, layer->y);
cairo_paint_with_alpha(cairo, layer->opacity / 255.0);
}
/* Retrieve default layer (guaranteed to not be NULL) */
guacenc_layer* def_layer = guacenc_display_get_layer(display, 0);
assert(def_layer != NULL);
/* STUB: Write frame as PNG */
char filename[256];
sprintf(filename, "frame-%" PRId64 ".png", timestamp);
cairo_surface_t* surface = def_layer->frame->surface;
if (surface != NULL)
cairo_surface_write_to_png(surface, filename);
return 0;
}
guacenc_layer* guacenc_display_get_layer(guacenc_display* display,
int index) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_LAYERS) {
guacenc_log(GUAC_LOG_WARNING, "Layer index out of bounds: %i", index);
return NULL;
}
/* Lookup layer, allocating a new layer if necessary */
guacenc_layer* layer = display->layers[index];
if (layer == NULL) {
/* Attempt to allocate layer */
layer = guacenc_layer_alloc();
if (layer == NULL) {
guacenc_log(GUAC_LOG_WARNING, "Layer allocation failed");
return NULL;
}
/* The default layer has no parent */
if (index == 0)
layer->parent_index = GUACENC_LAYER_NO_PARENT;
/* Store layer within display for future retrieval / management */
display->layers[index] = layer;
}
return layer;
}
int guacenc_display_get_depth(guacenc_display* display, guacenc_layer* layer) {
/* Non-existent layers have a depth of 0 */
if (layer == NULL)
return 0;
/* Layers with no parent have a depth of 0 */
if (layer->parent_index == GUACENC_LAYER_NO_PARENT)
return 0;
/* Retrieve parent layer */
guacenc_layer* parent =
guacenc_display_get_layer(display, layer->parent_index);
/* Current layer depth is the depth of the parent + 1 */
return guacenc_display_get_depth(display, parent) + 1;
}
int guacenc_display_free_layer(guacenc_display* display,
int index) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_LAYERS) {
guacenc_log(GUAC_LOG_WARNING, "Layer index out of bounds: %i", index);
return 1;
}
/* Free layer (if allocated) */
guacenc_layer_free(display->layers[index]);
/* Mark layer as freed */
display->layers[index] = NULL;
return 0;
}
guacenc_buffer* guacenc_display_get_buffer(guacenc_display* display,
int index) {
/* Transform index to buffer space */
int internal_index = -index - 1;
/* Do not lookup / allocate if index is invalid */
if (internal_index < 0 || internal_index > GUACENC_DISPLAY_MAX_BUFFERS) {
guacenc_log(GUAC_LOG_WARNING, "Buffer index out of bounds: %i", index);
return NULL;
}
/* Lookup buffer, allocating a new buffer if necessary */
guacenc_buffer* buffer = display->buffers[internal_index];
if (buffer == NULL) {
/* Attempt to allocate buffer */
buffer = guacenc_buffer_alloc();
if (buffer == NULL) {
guacenc_log(GUAC_LOG_WARNING, "Buffer allocation failed");
return NULL;
}
/* All non-layer buffers must autosize */
buffer->autosize = true;
/* Store buffer within display for future retrieval / management */
display->buffers[internal_index] = buffer;
}
return buffer;
}
int guacenc_display_free_buffer(guacenc_display* display,
int index) {
/* Transform index to buffer space */
int internal_index = -index - 1;
/* Do not lookup / allocate if index is invalid */
if (internal_index < 0 || internal_index > GUACENC_DISPLAY_MAX_BUFFERS) {
guacenc_log(GUAC_LOG_WARNING, "Buffer index out of bounds: %i", index);
return 1;
}
/* Free buffer (if allocated) */
guacenc_buffer_free(display->buffers[internal_index]);
/* Mark buffer as freed */
display->buffers[internal_index] = NULL;
return 0;
}
guacenc_buffer* guacenc_display_get_related_buffer(guacenc_display* display,
int index) {
/* Retrieve underlying buffer of layer if a layer is requested */
if (index >= 0) {
/* Retrieve / allocate layer (if possible */
guacenc_layer* layer = guacenc_display_get_layer(display, index);
if (layer == NULL)
return NULL;
/* Return underlying buffer */
return layer->buffer;
}
/* Otherwise retrieve buffer directly */
return guacenc_display_get_buffer(display, index);
}
int guacenc_display_create_image_stream(guacenc_display* display, int index,
int mask, int layer_index, const char* mimetype, int x, int y) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_STREAMS) {
guacenc_log(GUAC_LOG_WARNING, "Stream index out of bounds: %i", index);
return 1;
}
/* Free existing stream (if any) */
guacenc_image_stream_free(display->image_streams[index]);
/* Associate new stream */
guacenc_image_stream* stream = display->image_streams[index] =
guacenc_image_stream_alloc(mask, layer_index, mimetype, x, y);
/* Return zero only if stream is not NULL */
return stream == NULL;
}
guacenc_image_stream* guacenc_display_get_image_stream(
guacenc_display* display, int index) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_STREAMS) {
guacenc_log(GUAC_LOG_WARNING, "Stream index out of bounds: %i", index);
return NULL;
}
/* Return existing stream (if any) */
return display->image_streams[index];
}
int guacenc_display_free_image_stream(guacenc_display* display, int index) {
/* Do not lookup / allocate if index is invalid */
if (index < 0 || index > GUACENC_DISPLAY_MAX_STREAMS) {
guacenc_log(GUAC_LOG_WARNING, "Stream index out of bounds: %i", index);
return 1;
}
/* Free stream (if allocated) */
guacenc_image_stream_free(display->image_streams[index]);
/* Mark stream as freed */
display->image_streams[index] = NULL;
return 0;
}
cairo_operator_t guacenc_display_cairo_operator(guac_composite_mode mask) { cairo_operator_t guacenc_display_cairo_operator(guac_composite_mode mask) {

16
src/guacenc/display.h
View File

@ -102,6 +102,22 @@ typedef struct guacenc_display {
*/ */
int guacenc_display_sync(guacenc_display* display, guac_timestamp timestamp); int guacenc_display_sync(guacenc_display* display, guac_timestamp timestamp);
/**
* Flattens the given display, rendering all child layers to the frame buffers
* of their parent layers. The frame buffer of the default layer of the display
* will thus contain the flattened, composited rendering of the entire display
* state after this function succeeds. The contents of the frame buffers of
* each layer are replaced by this function.
*
* @param display
* The display to flatten.
*
* @return
* Zero if the flatten operation succeeds, non-zero if an error occurs
* preventing proper rendering.
*/
int guacenc_display_flatten(guacenc_display* display);
/** /**
* Allocates a new Guacamole video encoder display. This display serves as the * Allocates a new Guacamole video encoder display. This display serves as the
* representation of encoding state, as well as the state of the Guacamole * representation of encoding state, as well as the state of the Guacamole