void guac_rdp_cache_bitmap(rdpContext* context, rdpBitmap* bitmap) {
guac_client* client = ((rdp_freerdp_context*) context)->client;
guac_socket* socket = client->socket;
/* Allocate surface */
guac_layer* buffer = guac_client_alloc_buffer(client);
guac_common_surface* surface = guac_common_surface_alloc(socket, buffer, bitmap->width, bitmap->height);
/* Cache image data if present */
if (bitmap->data != NULL) {
/* Create surface from image data */
cairo_surface_t* image = cairo_image_surface_create_for_data(
bitmap->data, CAIRO_FORMAT_RGB24,
bitmap->width, bitmap->height, 4*bitmap->width);
/* Send surface to buffer */
guac_common_surface_draw(surface, 0, 0, image);
/* Free surface */
cairo_surface_destroy(image);
}
/* Store buffer reference in bitmap */
((guac_rdp_bitmap*) bitmap)->buffer = buffer;
((guac_rdp_bitmap*) bitmap)->surface = surface;
}
void guac_rdp_bitmap_paint(rdpContext* context, rdpBitmap* bitmap) {
guac_client* client = ((rdp_freerdp_context*) context)->client;
rdp_guac_client_data* client_data = (rdp_guac_client_data*) client->data;
guac_common_surface* surface = ((guac_rdp_bitmap*) bitmap)->surface;
int width = bitmap->right - bitmap->left + 1;
int height = bitmap->bottom - bitmap->top + 1;
/* If not cached, cache if necessary */
if (surface == NULL && ((guac_rdp_bitmap*) bitmap)->used >= 1)
guac_rdp_cache_bitmap(context, bitmap);
/* If cached, retrieve from cache */
if (surface != NULL)
guac_common_surface_copy(surface, 0, 0, width, height,
client_data->default_surface, bitmap->left, bitmap->top);
/* Otherwise, draw with stored image data */
else if (bitmap->data != NULL) {
/* Create surface from image data */
cairo_surface_t* image = cairo_image_surface_create_for_data(
bitmap->data, CAIRO_FORMAT_RGB24,
width, height, 4*bitmap->width);
/* Draw image on default surface */
guac_common_surface_draw(client_data->default_surface, bitmap->left, bitmap->top, image);
/* Free surface */
cairo_surface_destroy(image);
}
/* Increment usage counter */
((guac_rdp_bitmap*) bitmap)->used++;
}
void guac_rdp_gdi_memblt(rdpContext* context, MEMBLT_ORDER* memblt) {
guac_client* client = ((rdp_freerdp_context*) context)->client;
guac_common_surface* current_surface = ((rdp_guac_client_data*) client->data)->current_surface;
guac_rdp_bitmap* bitmap = (guac_rdp_bitmap*) memblt->bitmap;
int x = memblt->nLeftRect;
int y = memblt->nTopRect;
int w = memblt->nWidth;
int h = memblt->nHeight;
int x_src = memblt->nXSrc;
int y_src = memblt->nYSrc;
/* Make sure that the recieved bitmap is not NULL before processing */
if (bitmap == NULL) {
guac_client_log(client, GUAC_LOG_INFO, "NULL bitmap found in memblt instruction.");
return;
}
switch (memblt->bRop) {
/* If blackness, send black rectangle */
case 0x00:
guac_common_surface_rect(current_surface, x, y, w, h, 0, 0, 0);
break;
/* If NOP, do nothing */
case 0xAA:
break;
/* If operation is just SRC, simply copy */
case 0xCC:
/* If not cached, cache if necessary */
if (bitmap->surface == NULL && bitmap->used >= 1)
guac_rdp_cache_bitmap(context, memblt->bitmap);
/* If not cached, send as PNG */
if (bitmap->surface == NULL) {
if (memblt->bitmap->data != NULL) {
/* Create surface from image data */
cairo_surface_t* surface = cairo_image_surface_create_for_data(
memblt->bitmap->data + 4*(x_src + y_src*memblt->bitmap->width),
CAIRO_FORMAT_RGB24, w, h, 4*memblt->bitmap->width);
/* Send surface to buffer */
guac_common_surface_draw(current_surface, x, y, surface);
/* Free surface */
cairo_surface_destroy(surface);
}
}
/* Otherwise, copy */
else
guac_common_surface_copy(bitmap->surface, x_src, y_src, w, h,
current_surface, x, y);
/* Increment usage counter */
((guac_rdp_bitmap*) bitmap)->used++;
break;
/* If whiteness, send white rectangle */
case 0xFF:
guac_common_surface_rect(current_surface, x, y, w, h, 0xFF, 0xFF, 0xFF);
break;
/* Otherwise, use transfer */
default:
/* If not available as a surface, make available. */
if (bitmap->surface == NULL)
guac_rdp_cache_bitmap(context, memblt->bitmap);
guac_common_surface_transfer(bitmap->surface, x_src, y_src, w, h,
guac_rdp_rop3_transfer_function(client, memblt->bRop),
current_surface, x, y);
/* Increment usage counter */
((guac_rdp_bitmap*) bitmap)->used++;
}
}
/**
* Sends the given character to the terminal at the given row and column,
* rendering the character immediately. This bypasses the guac_terminal_display
* mechanism and is intended for flushing of updates only.
*/
int __guac_terminal_set(guac_terminal_display* display, int row, int col, int codepoint) {
int width;
int bytes;
char utf8[4];
/* Use foreground color */
const guac_terminal_color* color =
&guac_terminal_palette[display->glyph_foreground];
/* Use background color */
const guac_terminal_color* background =
&guac_terminal_palette[display->glyph_background];
cairo_surface_t* surface;
cairo_t* cairo;
int surface_width, surface_height;
PangoLayout* layout;
int layout_width, layout_height;
int ideal_layout_width, ideal_layout_height;
/* Calculate width in columns */
width = wcwidth(codepoint);
if (width < 0)
width = 1;
/* Do nothing if glyph is empty */
if (width == 0)
return 0;
/* Convert to UTF-8 */
bytes = guac_terminal_encode_utf8(codepoint, utf8);
surface_width = width * display->char_width;
surface_height = display->char_height;
ideal_layout_width = surface_width * PANGO_SCALE;
ideal_layout_height = surface_height * PANGO_SCALE;
/* Prepare surface */
surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24,
surface_width, surface_height);
cairo = cairo_create(surface);
/* Fill background */
cairo_set_source_rgb(cairo,
background->red / 255.0,
background->green / 255.0,
background->blue / 255.0);
cairo_rectangle(cairo, 0, 0, surface_width, surface_height);
cairo_fill(cairo);
/* Get layout */
layout = pango_cairo_create_layout(cairo);
pango_layout_set_font_description(layout, display->font_desc);
pango_layout_set_text(layout, utf8, bytes);
pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
pango_layout_get_size(layout, &layout_width, &layout_height);
/* If layout bigger than available space, scale it back */
if (layout_width > ideal_layout_width || layout_height > ideal_layout_height) {
double scale = fmin(ideal_layout_width / (double) layout_width,
ideal_layout_height / (double) layout_height);
cairo_scale(cairo, scale, scale);
/* Update layout to reflect scaled surface */
pango_layout_set_width(layout, ideal_layout_width / scale);
pango_layout_set_height(layout, ideal_layout_height / scale);
pango_cairo_update_layout(cairo, layout);
}
/* Draw */
cairo_set_source_rgb(cairo,
color->red / 255.0,
color->green / 255.0,
color->blue / 255.0);
cairo_move_to(cairo, 0.0, 0.0);
pango_cairo_show_layout(cairo, layout);
/* Draw */
guac_common_surface_draw(display->display_surface,
display->char_width * col,
display->char_height * row,
surface);
/* Free all */
g_object_unref(layout);
cairo_destroy(cairo);
cairo_surface_destroy(surface);
return 0;
}