guacamole-spice-protocol/src/guacenc/display.c

259 lines
6.9 KiB
C
Raw Normal View History

/*
* 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 "log.h"
#include <guacamole/client.h>
2016-02-27 23:15:17 +00:00
#include <guacamole/protocol.h>
#include <guacamole/timestamp.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_DEBUG, "Decreasing sync timestamp");
return 1;
}
/* Update timestamp of display */
display->last_sync = timestamp;
/* STUB */
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_DEBUG, "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_DEBUG, "Layer allocation failed");
return NULL;
}
/* Store layer within display for future retrieval / management */
display->layers[index] = layer;
}
return layer;
}
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_DEBUG, "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_DEBUG, "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_DEBUG, "Buffer allocation failed");
return NULL;
}
/* 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_DEBUG, "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);
}
2016-02-27 23:15:17 +00:00
cairo_operator_t guacenc_display_cairo_operator(guac_composite_mode mask) {
/* Translate Guacamole channel mask into Cairo operator */
switch (mask) {
/* Source */
case GUAC_COMP_SRC:
return CAIRO_OPERATOR_SOURCE;
/* Over */
case GUAC_COMP_OVER:
return CAIRO_OPERATOR_OVER;
/* In */
case GUAC_COMP_IN:
return CAIRO_OPERATOR_IN;
/* Out */
case GUAC_COMP_OUT:
return CAIRO_OPERATOR_OUT;
/* Atop */
case GUAC_COMP_ATOP:
return CAIRO_OPERATOR_ATOP;
/* Over (source/destination reversed) */
case GUAC_COMP_ROVER:
return CAIRO_OPERATOR_DEST_OVER;
/* In (source/destination reversed) */
case GUAC_COMP_RIN:
return CAIRO_OPERATOR_DEST_IN;
/* Out (source/destination reversed) */
case GUAC_COMP_ROUT:
return CAIRO_OPERATOR_DEST_OUT;
/* Atop (source/destination reversed) */
case GUAC_COMP_RATOP:
return CAIRO_OPERATOR_DEST_ATOP;
/* XOR */
case GUAC_COMP_XOR:
return CAIRO_OPERATOR_XOR;
/* Additive */
case GUAC_COMP_PLUS:
return CAIRO_OPERATOR_ADD;
/* If unrecognized, just default to CAIRO_OPERATOR_OVER */
default:
return CAIRO_OPERATOR_OVER;
}
}
guacenc_display* guacenc_display_alloc() {
return (guacenc_display*) calloc(1, sizeof(guacenc_display));
}
int guacenc_display_free(guacenc_display* display) {
int i;
/* Ignore NULL display */
if (display == NULL)
return 0;
/* Free all buffers */
for (i = 0; i < GUACENC_DISPLAY_MAX_BUFFERS; i++)
free(display->buffers[i]);
/* Free all layers */
for (i = 0; i < GUACENC_DISPLAY_MAX_LAYERS; i++)
guacenc_layer_free(display->layers[i]);
/* Free all streams */
for (i = 0; i < GUACENC_DISPLAY_MAX_STREAMS; i++)
free(display->image_streams[i]);
free(display);
return 0;
}