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

/*
 * Copyright (C) 2013 Glyptodon LLC
 *
 * 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 "client.h"
#include "guac_surface.h"
#include "rdp_color.h"
#include "rdp_glyph.h"
#include "rdp_settings.h"

#include <freerdp/freerdp.h>
#include <guacamole/client.h>

#ifdef ENABLE_WINPR
#include <winpr/wtypes.h>
#else
#include "compat/winpr-wtypes.h"
#endif

#include <pthread.h>
#include <stdint.h>
#include <stdlib.h>

/* 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

void guac_rdp_glyph_new(rdpContext* context, rdpGlyph* glyph) {

    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;

            }

        }
    }

    /* Store glyph surface */
    ((guac_rdp_glyph*) glyph)->surface = cairo_image_surface_create_for_data(
            image_buffer, CAIRO_FORMAT_ARGB32, width, height, stride);

}

void guac_rdp_glyph_draw(rdpContext* context, rdpGlyph* glyph, int x, int y) {

    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 = guac_client_data->current_surface;
    uint32_t fgcolor = guac_client_data->glyph_color;

    /* Paint with glyph as mask */
    guac_common_surface_paint(current_surface, x, y, ((guac_rdp_glyph*) glyph)->surface,
                               (fgcolor & 0xFF0000) >> 16,
                               (fgcolor & 0x00FF00) >> 8,
                                fgcolor & 0x0000FF);

}

void guac_rdp_glyph_free(rdpContext* context, rdpGlyph* glyph) {

    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);

}

void guac_rdp_glyph_begindraw(rdpContext* context,
        int x, int y, int width, int height, UINT32 fgcolor, UINT32 bgcolor) {

    guac_client* client = ((rdp_freerdp_context*) context)->client;
    rdp_guac_client_data* guac_client_data =
        (rdp_guac_client_data*) client->data;

    /* Fill background with color if specified */
    if (width != 0 && height != 0) {

        /* Convert background color */
        bgcolor = guac_rdp_convert_color(context, bgcolor);

        guac_common_surface_rect(guac_client_data->current_surface, x, y, width, height,
                                 (bgcolor & 0xFF0000) >> 16,
                                 (bgcolor & 0x00FF00) >> 8,
                                  bgcolor & 0x0000FF);

    }

    /* Convert foreground color */
    guac_client_data->glyph_color = guac_rdp_convert_color(context, fgcolor);

}

void guac_rdp_glyph_enddraw(rdpContext* context,
        int x, int y, int width, int height, UINT32 fgcolor, UINT32 bgcolor) {
    /* IGNORE */
}