guacamole-spice-protocol/src/protocols/rdp/rdp_glyph.c

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/*
* Copyright (C) 2013 Glyptodon LLC
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*
* 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:
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*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
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*
* 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.
*/
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#include "config.h"
#include "client.h"
#include "guac_surface.h"
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#include "rdp_glyph.h"
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#include <pthread.h>
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#include <freerdp/freerdp.h>
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#include <guacamole/client.h>
#include <guacamole/error.h>
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#ifdef ENABLE_WINPR
#include <winpr/wtypes.h>
#else
#include "compat/winpr-wtypes.h"
#endif
/* Define cairo_format_stride_for_width() if missing */
#ifndef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
#define cairo_format_stride_for_width(format, width) (width*4)
#endif
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void guac_rdp_glyph_new(rdpContext* context, rdpGlyph* glyph) {
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int x, y, i;
int stride;
unsigned char* image_buffer;
unsigned char* image_buffer_row;
unsigned char* data = glyph->aj;
int width = glyph->cx;
int height = glyph->cy;
/* Init Cairo buffer */
stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, width);
image_buffer = malloc(height*stride);
image_buffer_row = image_buffer;
/* Copy image data from image data to buffer */
for (y = 0; y<height; y++) {
unsigned int* image_buffer_current;
/* Get current buffer row, advance to next */
image_buffer_current = (unsigned int*) image_buffer_row;
image_buffer_row += stride;
for (x = 0; x<width;) {
/* Get byte from image data */
unsigned int v = *(data++);
/* Read bits, write pixels */
for (i = 0; i<8 && x<width; i++, x++) {
/* Output RGB */
if (v & 0x80)
*(image_buffer_current++) = 0xFF000000;
else
*(image_buffer_current++) = 0x00000000;
/* Next bit */
v <<= 1;
}
}
}
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/* Store glyph surface */
((guac_rdp_glyph*) glyph)->surface = cairo_image_surface_create_for_data(
image_buffer, CAIRO_FORMAT_ARGB32, width, height, stride);
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}
void guac_rdp_glyph_draw(rdpContext* context, rdpGlyph* glyph, int x, int y) {
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guac_client* client = ((rdp_freerdp_context*) context)->client;
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rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
/* Do not attempt to draw glyphs if glyph drawing is not begun */
if (guac_client_data->glyph_cairo == NULL)
return;
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/* Use glyph as mask */
cairo_mask_surface(
guac_client_data->glyph_cairo,
((guac_rdp_glyph*) glyph)->surface, x, y);
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}
void guac_rdp_glyph_free(rdpContext* context, rdpGlyph* glyph) {
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unsigned char* image_buffer = cairo_image_surface_get_data(
((guac_rdp_glyph*) glyph)->surface);
/* Free surface */
cairo_surface_destroy(((guac_rdp_glyph*) glyph)->surface);
free(image_buffer);
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}
void guac_rdp_glyph_begindraw(rdpContext* context,
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int x, int y, int width, int height, UINT32 fgcolor, UINT32 bgcolor) {
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guac_client* client = ((rdp_freerdp_context*) context)->client;
rdp_guac_client_data* guac_client_data =
(rdp_guac_client_data*) client->data;
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/* Convert foreground color */
fgcolor = freerdp_color_convert_var(fgcolor,
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guac_client_data->settings.color_depth, 32,
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((rdp_freerdp_context*) context)->clrconv);
/* Fill background with color if specified */
if (width != 0 && height != 0) {
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/* Prepare for opaque glyphs */
guac_client_data->glyph_surface =
guac_client_data->opaque_glyph_surface;
/* Create cairo instance */
guac_client_data->glyph_cairo = cairo_create(
guac_client_data->glyph_surface);
/* Convert background color */
bgcolor = freerdp_color_convert_var(bgcolor,
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guac_client_data->settings.color_depth, 32,
((rdp_freerdp_context*) context)->clrconv);
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/* Fill background */
cairo_rectangle(guac_client_data->glyph_cairo,
x, y, width, height);
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cairo_set_source_rgb(guac_client_data->glyph_cairo,
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((bgcolor & 0xFF0000) >> 16) / 255.0,
((bgcolor & 0x00FF00) >> 8 ) / 255.0,
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( bgcolor & 0x0000FF ) / 255.0);
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cairo_fill(guac_client_data->glyph_cairo);
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}
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/* Otherwise, prepare for transparent glyphs */
else {
/* Select transparent glyph surface */
guac_client_data->glyph_surface =
guac_client_data->trans_glyph_surface;
guac_client_data->glyph_cairo = cairo_create(
guac_client_data->glyph_surface);
/* Clear surface */
cairo_set_operator(guac_client_data->glyph_cairo,
CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(guac_client_data->glyph_cairo, 0, 0, 0, 0);
cairo_paint(guac_client_data->glyph_cairo);
/* Restore operator */
cairo_set_operator(guac_client_data->glyph_cairo,
CAIRO_OPERATOR_OVER);
}
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/* Prepare for glyph drawing */
cairo_set_source_rgb(guac_client_data->glyph_cairo,
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((fgcolor & 0xFF0000) >> 16) / 255.0,
((fgcolor & 0x00FF00) >> 8 ) / 255.0,
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( fgcolor & 0x0000FF ) / 255.0);
}
void guac_rdp_glyph_enddraw(rdpContext* context,
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int x, int y, int width, int height, UINT32 fgcolor, UINT32 bgcolor) {
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guac_client* client = ((rdp_freerdp_context*) context)->client;
rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
guac_common_surface* current_surface = ((rdp_guac_client_data*) client->data)->current_surface;
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/* Use glyph surface to provide image data for glyph rectangle */
cairo_surface_t* glyph_surface = guac_client_data->glyph_surface;
int stride = cairo_image_surface_get_stride(glyph_surface);
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/* Calculate bounds */
int max_width = cairo_image_surface_get_width(glyph_surface) - x;
int max_height = cairo_image_surface_get_height(glyph_surface) - y;
/* Ensure dimensions of glyph do not exceed bounds */
if (width > max_width) width = max_width;
if (height > max_height) height = max_height;
/* Ensure data is ready */
cairo_surface_flush(glyph_surface);
/* Create surface for subsection with text */
cairo_surface_t* surface = cairo_image_surface_create_for_data(
cairo_image_surface_get_data(glyph_surface) + 4*x + y*stride,
cairo_image_surface_get_format(glyph_surface),
width, height, stride);
/* Send surface with all glyphs to current surface */
guac_common_surface_draw(current_surface, x, y, surface);
/* Destroy surface */
cairo_surface_destroy(surface);
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/* Destroy cairo instance */
cairo_destroy(guac_client_data->glyph_cairo);
}