GUACAMOLE-313: Implement the "cursor" instruction to guacenc.
This commit is contained in:
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df770ae4ea
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a14832c4da
@ -26,6 +26,7 @@ man_MANS = \
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noinst_HEADERS = \
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noinst_HEADERS = \
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buffer.h \
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buffer.h \
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cursor.h \
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display.h \
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display.h \
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encode.h \
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encode.h \
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ffmpeg-compat.h \
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ffmpeg-compat.h \
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@ -41,6 +42,7 @@ noinst_HEADERS = \
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guacenc_SOURCES = \
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guacenc_SOURCES = \
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buffer.c \
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buffer.c \
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cursor.c \
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display.c \
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display.c \
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display-buffers.c \
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display-buffers.c \
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display-image-streams.c \
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display-image-streams.c \
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57
src/guacenc/cursor.c
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57
src/guacenc/cursor.c
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@ -0,0 +1,57 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#include "config.h"
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#include "buffer.h"
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#include "cursor.h"
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#include <stdlib.h>
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guacenc_cursor* guacenc_cursor_alloc() {
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/* Allocate new cursor */
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guacenc_cursor* cursor = (guacenc_cursor*) calloc(1,
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sizeof(guacenc_cursor));
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if (cursor == NULL)
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return NULL;
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/* Allocate associated buffer (image) */
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cursor->buffer = guacenc_buffer_alloc();
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if (cursor->buffer == NULL) {
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free(cursor);
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return NULL;
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}
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return cursor;
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}
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void guacenc_cursor_free(guacenc_cursor* cursor) {
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/* Ignore NULL cursors */
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if (cursor == NULL)
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return;
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/* Free underlying buffer */
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guacenc_buffer_free(cursor->buffer);
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free(cursor);
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}
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83
src/guacenc/cursor.h
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83
src/guacenc/cursor.h
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@ -0,0 +1,83 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#ifndef GUACENC_CURSOR_H
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#define GUACENC_CURSOR_H
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#include "config.h"
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#include "buffer.h"
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#include <guacamole/protocol.h>
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#include <guacamole/timestamp.h>
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/**
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* A mouse cursor, having a current location, hostspot, and associated cursor
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* image.
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*/
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typedef struct guacenc_cursor {
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/**
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* The current X coordinate of the mouse cursor, in pixels.
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*/
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int x;
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/**
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* The current Y coordinate of the mouse cursor, in pixels.
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*/
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int y;
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/**
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* The X coordinate of the mouse cursor hotspot within the cursor image,
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* in pixels.
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*/
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int hotspot_x;
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/**
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* The Y coordinate of the mouse cursor hotspot within the cursor image,
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* in pixels.
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*/
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int hotspot_y;
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/**
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* The current mouse cursor image.
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*/
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guacenc_buffer* buffer;
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} guacenc_cursor;
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/**
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* Allocates and initializes a new cursor object.
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*
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* @return
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* A newly-allocated and initialized guacenc_cursor, or NULL if allocation
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* fails.
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*/
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guacenc_cursor* guacenc_cursor_alloc();
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/**
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* Frees all memory associated with the given cursor object. If the cursor
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* provided is NULL, this function has no effect.
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*
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* @param cursor
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* The cursor to free, which may be NULL.
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*/
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void guacenc_cursor_free(guacenc_cursor* cursor);
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#endif
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@ -20,9 +20,12 @@
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#include "config.h"
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#include "config.h"
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#include "display.h"
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#include "display.h"
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#include "layer.h"
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#include "layer.h"
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#include "log.h"
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#include <cairo/cairo.h>
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#include <cairo/cairo.h>
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#include <guacamole/client.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string.h>
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@ -75,6 +78,46 @@ static int guacenc_display_layer_comparator(const void* a, const void* b) {
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}
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}
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/**
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* Renders the mouse cursor on top of the frame buffer of the default layer of
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* the given display.
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*
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* @param display
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* The display whose mouse cursor should be rendered to the frame buffer
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* of its default layer.
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*
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* @return
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* Zero if rendering succeeds, non-zero otherwise.
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*/
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static int guacenc_display_render_cursor(guacenc_display* display) {
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guacenc_cursor* cursor = display->cursor;
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/* Retrieve default layer (guaranteed to not be NULL) */
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guacenc_layer* def_layer = guacenc_display_get_layer(display, 0);
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assert(def_layer != NULL);
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/* Get source and destination buffers */
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guacenc_buffer* src = cursor->buffer;
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guacenc_buffer* dst = def_layer->frame;
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/* Render cursor to layer */
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if (src->width > 0 && src->height > 0) {
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cairo_set_source_surface(dst->cairo, src->surface,
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cursor->x - cursor->hotspot_x,
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cursor->y - cursor->hotspot_y);
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cairo_rectangle(dst->cairo,
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cursor->x - cursor->hotspot_x,
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cursor->y - cursor->hotspot_y,
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src->width, src->height);
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cairo_fill(dst->cairo);
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}
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/* Always succeeds */
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return 0;
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}
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int guacenc_display_flatten(guacenc_display* display) {
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int guacenc_display_flatten(guacenc_display* display) {
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int i;
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int i;
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@ -151,7 +194,8 @@ int guacenc_display_flatten(guacenc_display* display) {
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}
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}
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return 0;
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/* Render cursor on top of everything else */
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return guacenc_display_render_cursor(display);
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}
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}
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@ -18,6 +18,7 @@
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*/
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*/
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#include "config.h"
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#include "config.h"
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#include "cursor.h"
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#include "display.h"
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#include "display.h"
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#include "video.h"
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#include "video.h"
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@ -97,6 +98,9 @@ guacenc_display* guacenc_display_alloc(const char* path, const char* codec,
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/* Associate display with video output */
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/* Associate display with video output */
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display->output = video;
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display->output = video;
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/* Allocate special-purpose cursor layer */
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display->cursor = guacenc_cursor_alloc();
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return display;
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return display;
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}
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}
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@ -124,6 +128,9 @@ int guacenc_display_free(guacenc_display* display) {
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for (i = 0; i < GUACENC_DISPLAY_MAX_STREAMS; i++)
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for (i = 0; i < GUACENC_DISPLAY_MAX_STREAMS; i++)
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guacenc_image_stream_free(display->image_streams[i]);
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guacenc_image_stream_free(display->image_streams[i]);
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/* Free cursor */
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guacenc_cursor_free(display->cursor);
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free(display);
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free(display);
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return retval;
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return retval;
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@ -22,10 +22,12 @@
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#include "config.h"
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#include "config.h"
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#include "buffer.h"
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#include "buffer.h"
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#include "cursor.h"
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#include "image-stream.h"
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#include "image-stream.h"
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#include "layer.h"
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#include "layer.h"
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#include "video.h"
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#include "video.h"
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#include <cairo/cairo.h>
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#include <guacamole/protocol.h>
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#include <guacamole/protocol.h>
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#include <guacamole/timestamp.h>
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#include <guacamole/timestamp.h>
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@ -52,6 +54,11 @@
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*/
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*/
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typedef struct guacenc_display {
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typedef struct guacenc_display {
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/**
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* The current mouse cursor state.
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*/
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guacenc_cursor* cursor;
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/**
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/**
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* All currently-allocated buffers. The index of the buffer corresponds to
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* All currently-allocated buffers. The index of the buffer corresponds to
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* its position within this array, where -1 is the 0th entry. If a buffer
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* its position within this array, where -1 is the 0th entry. If a buffer
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*/
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*/
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#include "config.h"
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#include "config.h"
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#include "buffer.h"
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#include "cursor.h"
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#include "display.h"
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#include "display.h"
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#include "log.h"
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#include "log.h"
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@ -36,16 +38,32 @@ int guacenc_handle_cursor(guacenc_display* display, int argc, char** argv) {
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/* Parse arguments */
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/* Parse arguments */
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int hotspot_x = atoi(argv[0]);
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int hotspot_x = atoi(argv[0]);
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int hotspot_y = atoi(argv[1]);
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int hotspot_y = atoi(argv[1]);
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int src_index = atoi(argv[2]);
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int sindex = atoi(argv[2]);
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int src_x = atoi(argv[3]);
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int sx = atoi(argv[3]);
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int src_y = atoi(argv[4]);
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int sy = atoi(argv[4]);
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int src_w = atoi(argv[5]);
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int width = atoi(argv[5]);
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int src_h = atoi(argv[6]);
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int height = atoi(argv[6]);
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/* Nothing to do with cursor (yet) */
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/* Pull buffer of source layer/buffer */
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guacenc_log(GUAC_LOG_DEBUG, "Ignoring cursor: hotspot (%i, %i) "
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guacenc_buffer* src = guacenc_display_get_related_buffer(display, sindex);
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"src_layer=%i (%i, %i) %ix%i", hotspot_x, hotspot_y,
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if (src == NULL)
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src_index, src_x, src_y, src_w, src_h);
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return 1;
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/* Update cursor hotspot */
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guacenc_cursor* cursor = display->cursor;
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cursor->hotspot_x = hotspot_x;
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cursor->hotspot_y = hotspot_y;
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/* Resize cursor to exactly fit */
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guacenc_buffer_resize(cursor->buffer, width, height);
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/* Copy rectangle from source to cursor */
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guacenc_buffer* dst = cursor->buffer;
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if (src->surface != NULL && dst->cairo != NULL) {
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cairo_set_operator(dst->cairo, CAIRO_OPERATOR_SOURCE);
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cairo_set_source_surface(dst->cairo, src->surface, sx, sy);
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cairo_paint(dst->cairo);
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}
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return 0;
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return 0;
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