GUAC-236: Stub resize of buffers. Implement size.

src/guacenc/Makefile.am

@@ -34,6 +34,7 @@ noinst_HEADERS =   \
     log.h
 
 guacenc_SOURCES =          \
+    buffer.c               \
     display.c              \
     encode.c               \
     guacenc.c              \

src/guacenc/buffer.c

@@ -0,0 +1,46 @@
+/*
+ * 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 "buffer.h"
+
+#include <stdlib.h>
+
+guacenc_buffer* guacenc_buffer_alloc() {
+    return calloc(1, sizeof(guacenc_buffer));
+}
+
+void guacenc_buffer_free(guacenc_buffer* buffer) {
+    free(buffer);
+}
+
+int guacenc_buffer_resize(guacenc_buffer* buffer, int width, int height) {
+
+    /* STUB */
+
+    buffer->width = width;
+    buffer->height = height;
+
+    return 0;
+
+}
+

src/guacenc/buffer.h

@@ -41,7 +41,51 @@ typedef struct guacenc_buffer {
      */
     int height;
 
+    /**
+     * The number of bytes in each row of image data.
+     */
+    int stride;
+
 } guacenc_buffer;
 
+/**
+ * Allocates and initializes a new buffer object. This allocation is
+ * independent of the Guacamole video encoder display; the allocated
+ * guacenc_buffer will not automatically be associated with the active display.
+ *
+ * @return
+ *     A newly-allocated and initialized guacenc_buffer, or NULL if allocation
+ *     fails.
+ */
+guacenc_buffer* guacenc_buffer_alloc();
+
+/**
+ * Frees all memory associated with the given buffer object. If the buffer
+ * provided is NULL, this function has no effect.
+ *
+ * @param buffer
+ *     The buffer to free, which may be NULL.
+ */
+void guacenc_buffer_free(guacenc_buffer* buffer);
+
+/**
+ * Resizes the given buffer to the given dimensions, allocating or freeing
+ * memory as necessary, and updating the buffer's width, height, and stride
+ * properties.
+ *
+ * @param buffer
+ *     The buffer to resize.
+ *
+ * @param width
+ *     The new width of the buffer, in pixels.
+ *
+ * @param height
+ *     The new height of the buffer, in pixels.
+ *
+ * @return
+ *     Zero if the resize operation is successful, non-zero on error.
+ */
+int guacenc_buffer_resize(guacenc_buffer* buffer, int width, int height);
+
 #endif
 

src/guacenc/instruction-size.c

@@ -41,9 +41,13 @@ int guacenc_handle_size(guacenc_display* display, int argc, char** argv) {
     int width = atoi(argv[1]);
     int height = atoi(argv[2]);
 
-    /* STUB */
-    guacenc_log(GUAC_LOG_DEBUG, "size: layer=%i %ix%i", index, width, height);
-    return 0;
+    /* Retrieve requested layer */
+    guacenc_layer* layer = guacenc_display_get_layer(display, index);
+    if (layer == NULL)
+        return 1;
+
+    /* Resize layer */
+    return guacenc_buffer_resize(layer->buffer, width, height);
 
 }
 

src/guacenc/layer.c

@@ -21,6 +21,7 @@
  */
 
 #include "config.h"
+#include "buffer.h"
 #include "layer.h"
 
 #include <stdlib.h>
@@ -32,6 +33,13 @@ guacenc_layer* guacenc_layer_alloc() {
     if (layer == NULL)
         return NULL;
 
+    /* Allocate associated buffer (width, height, and image storage) */
+    layer->buffer = guacenc_buffer_alloc();
+    if (layer->buffer == NULL) {
+        free(layer);
+        return NULL;
+    }
+
     /* Layers default to fully opaque */
     layer->opacity = 0xFF;
 
@@ -40,6 +48,15 @@ guacenc_layer* guacenc_layer_alloc() {
 }
 
 void guacenc_layer_free(guacenc_layer* layer) {
+
+    /* Ignore NULL layers */
+    if (layer == NULL)
+        return;
+
+    /* Free underlying buffer */
+    guacenc_buffer_free(layer->buffer);
+
     free(layer);
+
 }