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Pango + working print() function

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This commit is contained in:
Michael Jumper 2011-07-31 20:51:19 -07:00
parent 0195a6ad1c
commit 69dbead349
3 changed files with 239 additions and 2 deletions
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5
protocols/ssh/Makefile.am
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@ -37,11 +37,12 @@
AUTOMAKE_OPTIONS = foreign
ACLOCAL_AMFLAGS = -I m4
AM_CFLAGS = -Werror -Wall -pedantic -Iinclude
lib_LTLIBRARIES = libguac-client-ssh.la
libguac_client_ssh_la_SOURCES = src/ssh.c
libguac_client_ssh_la_SOURCES = src/ssh_client.c
libguac_client_ssh_la_CFLAGS = -Werror -Wall -pedantic -Iinclude @PANGO_CFLAGS@ @PANGOCAIRO_CFLAGS@
libguac_client_ssh_la_LIBADD = @PANGO_LIBS@ @PANGOCAIRO_LIBS@
libguac_client_ssh_la_LDFLAGS = -version-info 0:0:0

2
protocols/ssh/configure.in
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@ -46,6 +46,8 @@ AC_PROG_LIBTOOL
# Checks for libraries.
AC_CHECK_LIB([guac], [guac_get_client],, AC_MSG_ERROR("libguac is required for communication via the guacamole protocol"))
AC_CHECK_LIB([cairo], [cairo_create],, AC_MSG_ERROR("cairo is required for drawing instructions"))
PKG_CHECK_MODULES([PANGO], pango);
PKG_CHECK_MODULES([PANGOCAIRO], pangocairo);
# Checks for header files.
AC_CHECK_HEADERS([guacamole/client.h guacamole/guacio.h guacamole/protocol.h])

234
protocols/ssh/src/ssh_client.c
View File

@ -38,15 +38,249 @@
#include <stdlib.h>
#include <string.h>
#include <cairo/cairo.h>
#include <pango/pangocairo.h>
#include <guacamole/log.h>
#include <guacamole/guacio.h>
#include <guacamole/protocol.h>
#include <guacamole/client.h>
/* Client plugin arguments */
const char* GUAC_CLIENT_ARGS[] = {
"hostname",
"port",
NULL
};
typedef struct ssh_guac_client_data {
PangoFontDescription* font_desc;
guac_layer* glyphs[256];
int char_width;
int char_height;
int term_width;
int term_height;
int cursor_row;
int cursor_col;
} ssh_guac_client_data;
int ssh_guac_client_send_glyph(guac_client* client, int row, int col, char c);
int ssh_guac_client_print(guac_client* client, const char* c);
int guac_client_init(guac_client* client, int argc, char** argv) {
GUACIO* io = client->io;
PangoFontMap* font_map;
PangoFont* font;
PangoFontMetrics* metrics;
PangoContext* context;
ssh_guac_client_data* client_data = malloc(sizeof(ssh_guac_client_data));
client_data->cursor_row = 0;
client_data->cursor_col = 0;
client_data->term_width = 80;
client_data->term_height = 25;
/* Get font */
client_data->font_desc = pango_font_description_new();
pango_font_description_set_family(client_data->font_desc, "monospace");
pango_font_description_set_weight(client_data->font_desc, PANGO_WEIGHT_NORMAL);
pango_font_description_set_size(client_data->font_desc, 16*PANGO_SCALE);
font_map = pango_cairo_font_map_get_default();
context = pango_font_map_create_context(font_map);
font = pango_font_map_load_font(font_map, context, client_data->font_desc);
if (font == NULL) {
guac_log_error("Unable to get font.");
return 1;
}
metrics = pango_font_get_metrics(font, NULL);
if (metrics == NULL) {
guac_log_error("Unable to get font metrics.");
return 1;
}
/* Calculate character dimensions */
client_data->char_width =
pango_font_metrics_get_approximate_digit_width(metrics) / PANGO_SCALE;
client_data->char_height =
(pango_font_metrics_get_descent(metrics)
+ pango_font_metrics_get_ascent(metrics)) / PANGO_SCALE;
client->data = client_data;
/* Send name and dimensions */
guac_send_name(io, "SSH TEST");
guac_send_size(io,
client_data->char_width * client_data->term_width,
client_data->char_height * client_data->term_height);
guac_flush(io);
ssh_guac_client_print(client, "Hello World!\r\nThis is a test of the new Guacamole SSH client plugin!!!\r\n");
guac_flush(io);
ssh_guac_client_print(client, "ROW 1\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 2\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 3\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 4\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 5\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 6\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 8\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 9\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 10\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 11\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 12\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 13\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 14\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 15\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 16\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 17\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 18\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 19\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 20\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 21\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 22\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 23\r\n"); guac_flush(io);
ssh_guac_client_print(client, "ROW 24\r\n"); guac_flush(io);
/* Success */
return 0;
}
guac_layer* ssh_guac_client_get_glyph(guac_client* client, char c) {
GUACIO* io = client->io;
ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
guac_layer* glyph;
cairo_surface_t* surface;
cairo_t* cairo;
PangoLayout* layout;
/* Return glyph if exists */
if (client_data->glyphs[(int) c])
return client_data->glyphs[(int) c];
/* Otherwise, draw glyph */
surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32,
client_data->char_width, client_data->char_height);
cairo = cairo_create(surface);
/* Get layout */
layout = pango_cairo_create_layout(cairo);
pango_layout_set_font_description(layout, client_data->font_desc);
pango_layout_set_text(layout, &c, 1);
/* Draw */
cairo_set_source_rgba(cairo, 1.0, 1.0, 1.0, 1.0);
cairo_move_to(cairo, 0.0, 0.0);
pango_cairo_show_layout(cairo, layout);
/* Free all */
g_object_unref(layout);
cairo_destroy(cairo);
/* Send glyph and save */
glyph = guac_client_alloc_buffer(client);
guac_send_png(io, GUAC_COMP_OVER, glyph, 0, 0, surface);
client_data->glyphs[(int) c] = glyph;
guac_flush(io);
cairo_surface_destroy(surface);
/* Return glyph */
return glyph;
}
int ssh_guac_client_send_glyph(guac_client* client, int row, int col, char c) {
GUACIO* io = client->io;
ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
guac_layer* glyph = ssh_guac_client_get_glyph(client, c);
return guac_send_copy(io,
glyph, 0, 0, client_data->char_width, client_data->char_height,
GUAC_COMP_OVER, GUAC_DEFAULT_LAYER,
client_data->char_width * col,
client_data->char_height * row);
}
int ssh_guac_client_print(guac_client* client, const char* c) {
GUACIO* io = client->io;
ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
while (*c != 0) {
switch (*c) {
/* Carriage return */
case '\r':
client_data->cursor_col = 0;
break;
/* Line feed */
case '\n':
client_data->cursor_row++;
break;
/* Displayable chars */
default:
ssh_guac_client_send_glyph(client,
client_data->cursor_row,
client_data->cursor_col,
*c);
/* Advance cursor, wrap if necessary */
client_data->cursor_col++;
if (client_data->cursor_col >= client_data->term_width) {
client_data->cursor_col = 0;
client_data->cursor_row++;
}
}
/* Scroll up if necessary */
if (client_data->cursor_row >= client_data->term_height) {
client_data->cursor_row = client_data->term_height - 1;
/* Copy screen up by one row */
guac_send_copy(io,
GUAC_DEFAULT_LAYER, 0, client_data->char_height,
client_data->char_width * client_data->term_width,
client_data->char_height * (client_data->term_height - 1),
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER, 0, 0);
/* Fill bottom row with background */
guac_send_rect(io,
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
0, client_data->char_height * (client_data->term_height - 1),
client_data->char_width * client_data->term_width,
client_data->char_height * client_data->term_height,
0, 0, 0, 255);
}
c++;
}
return 0;
}