/
GTKTurtleSpaceRenderer.cpp
313 lines (231 loc) · 8.7 KB
/
GTKTurtleSpaceRenderer.cpp
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/*
* TOBY -- An abstract interpreter engine and system for learning.
* Copyright (C) 1999 Ryan C. Gordon.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "platform/renderers/gtkrenderer/GTKTurtleSpaceRenderer.h"
// !!! make these into instance members!
static volatile bool window_still_not_displayed = true;
static volatile bool quit_event_caught = false;
static gboolean on_gtkcanvas_expose(GtkWidget *widget,
GdkEventExpose *event,
gpointer user_data)
{
GTKTurtleSpaceRenderer *r = (GTKTurtleSpaceRenderer *) user_data;
assert(r != NULL);
gint _x = event->area.x;
gint _y = event->area.y;
gint _w = event->area.width;
gint _h = event->area.height;
GdkGC *_gc = gdk_gc_new(widget->window);
GdkPixmap *p = r->getOffscreenPixmap();
if (p == NULL)
{
gdk_rgb_gc_set_foreground(_gc, 0x000000);
gdk_draw_rectangle(widget->window, _gc, TRUE, _x, _y, _w, _h);
} // if
else
{
gdk_draw_pixmap(widget->window, _gc, p, _x, _y, _x, _y, _w, _h);
} // else
gdk_gc_unref(_gc);
window_still_not_displayed = false;
return(FALSE);
} // on_gtkcanvas_expose
GTKTurtleSpaceRenderer::GTKTurtleSpaceRenderer(void)
: gc(NULL), offscreen_pixmap(NULL),
canvas(gtk_drawing_area_new())
{
gtk_widget_ref(canvas);
gdk_rgb_init();
gtk_widget_set_default_colormap(gdk_rgb_get_cmap());
gtk_widget_set_default_visual(gdk_rgb_get_visual());
gtk_signal_connect(GTK_OBJECT(canvas), "expose_event",
GTK_SIGNAL_FUNC(on_gtkcanvas_expose), this);
} // Constructor
GTKTurtleSpaceRenderer::~GTKTurtleSpaceRenderer(void)
{
if (canvas != NULL)
{
gtk_widget_hide(canvas);
gtk_widget_unref(canvas);
} // if
if (offscreen_pixmap != NULL)
{
gdk_pixmap_unref(offscreen_pixmap);
} // if
} // Destructor
bool GTKTurtleSpaceRenderer::resize(int w, int h)
{
_D(("GTK canvas resize: (%d, %d).\n", w, h));
if (canvas == NULL)
return(false);
GdkPixmap *pix = gdk_pixmap_new(canvas->window, w, h, -1);
if (pix == NULL)
return(false);
GtkStyle *_style = gtk_style_copy(gtk_widget_get_style(canvas));
memcpy(&(_style->bg[GTK_STATE_NORMAL]), &_style->black, sizeof (GdkColor));
gtk_widget_set_style(canvas, _style);
gtk_widget_set_usize(canvas, w, h);
gtk_widget_show(canvas);
GdkGC *_gc = gdk_gc_new(canvas->window);
gdk_rgb_gc_set_foreground(_gc, 0x00000000);
gdk_draw_rectangle(pix, _gc, TRUE, 0, 0, w, h);
if (offscreen_pixmap != NULL)
{
// !!! move old image to new pixmap. gdk_draw_pixmap(
gdk_pixmap_unref(offscreen_pixmap);
} // if
gdk_gc_unref(_gc);
offscreen_pixmap = pix;
while ((window_still_not_displayed) || (gtk_events_pending()))
gtk_main_iteration();
while ((canvas->allocation.width != w) || (canvas->allocation.height != h))
gtk_main_iteration();
return(true);
} // GTKTurtleSpaceRenderer::resize
void GTKTurtleSpaceRenderer::notifyGrabbed(void)
{
gc = gdk_gc_new(canvas->window);
assert(gc != NULL);
while (gtk_events_pending())
gtk_main_iteration();
} // GTKTurtleSpaceRenderer::notifyGrabbed
void GTKTurtleSpaceRenderer::notifyUngrabbed(void)
{
if (gc != NULL)
{
gdk_gc_destroy(gc);
gc = NULL;
} // if
while (gtk_events_pending())
gtk_main_iteration();
} // GTKTurtleSpaceRenderer::notifyUngrabbed
double GTKTurtleSpaceRenderer::getTurtleSpaceWidth(void)
{
assert(canvas != NULL);
return((double) canvas->allocation.width);
} // GTKTurtleSpaceRenderer::getTurtleSpaceWidth
double GTKTurtleSpaceRenderer::getTurtleSpaceHeight(void)
{
assert(canvas != NULL);
return((double) canvas->allocation.height);
} // GTKTurtleSpaceRenderer::getTurtleSpaceHeight
double GTKTurtleSpaceRenderer::getDesiredTurtleWidth(void)
{
return(canvas->allocation.width * 0.02);
} // GTKTurtleSpaceRenderer::getDesiredTurtleWidth
double GTKTurtleSpaceRenderer::getDesiredTurtleHeight(void)
{
return(canvas->allocation.height * 0.02);
} // GTKTurtleSpaceRenderer::getDesiredTurtleHeight
inline guint32 GTKTurtleSpaceRenderer::constructPixelValue(float r, float g,
float b, float a)
{
// !!! check this.
return(
//(((int) (a * 255.0)) << 24) |
(((int) (r * 255.0)) << 16) |
(((int) (b * 255.0)) << 8) |
(((int) (g * 255.0)) )
);
} // FrameBufferTurtleSpaceRenderer::constructPixelValue
void GTKTurtleSpaceRenderer::renderString(double x, double y, double angle,
float r, float b, float g, float a,
const char *str)
{
} // GTKTurtleSpaceRenderer::renderString
void GTKTurtleSpaceRenderer::renderLine(double _x1, double _y1,
double _x2, double _y2,
float r, float b,
float g, float a)
{
assert(canvas != NULL);
assert(offscreen_pixmap != NULL);
assert(gc != NULL);
guint32 pval = constructPixelValue(r, g, b, a);
gdk_rgb_gc_set_foreground(gc, pval);
int x1 = TobyGeometry::roundDoubleToInt(_x1);
int y1 = TobyGeometry::roundDoubleToInt(_y1);
int x2 = TobyGeometry::roundDoubleToInt(_x2);
int y2 = TobyGeometry::roundDoubleToInt(_y2);
gdk_draw_line(offscreen_pixmap, gc, x1, y1, x2, y2);
gdk_draw_line(canvas->window, gc, x1, y1, x2, y2);
} // GTKTurtleSpaceRenderer::renderLine
void GTKTurtleSpaceRenderer::renderTurtle(Turtle *t) throw (ExecException *)
{
} // GTKTurtleSpaceRenderer::renderTurtle
void GTKTurtleSpaceRenderer::blankTurtle(Turtle *t) throw (ExecException *)
{
} // GTKTurtleSpaceRenderer::blankTurtle
void GTKTurtleSpaceRenderer::cleanup(void) throw (ExecException *)
{
assert(canvas != NULL);
assert(gc != NULL);
gdk_rgb_gc_set_foreground(gc, 0x00000000);
gdk_draw_rectangle(canvas->window, gc, TRUE, 0, 0,
canvas->allocation.width, canvas->allocation.height);
while (gtk_events_pending())
gtk_main_iteration();
} // GTKTurtleSpaceRenderer::cleanup
GtkWidget *GTKTurtleSpaceRenderer::getDrawingAreaWidget(void)
{
return(canvas);
} // GTKTurtleSpaceRenderer::getDrawingAreaWidget
GdkPixmap *GTKTurtleSpaceRenderer::getOffscreenPixmap(void)
{
return(offscreen_pixmap);
} // GTKTurtleSpaceRenderer::getOffscreenPixmap
static gint on_gtk_window_delete(GtkWidget *widget,
GdkEvent *event,
gpointer data )
{
quit_event_caught = true;
return(FALSE);
} // on_gtk_window_delete
TurtleSpaceRenderer *__platformBuildStandaloneRenderer(char *winTitle,
int *argc, char ***argv)
{
window_still_not_displayed = true;
quit_event_caught = false;
gtk_init(argc, argv);
GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
assert(window != NULL);
// prevent user from resizing window...
gtk_window_set_policy(GTK_WINDOW(window), FALSE, FALSE, TRUE);
gtk_window_set_title(GTK_WINDOW(window), winTitle);
GTKTurtleSpaceRenderer *retval = new GTKTurtleSpaceRenderer();
assert(retval != NULL);
GtkWidget *darea = retval->getDrawingAreaWidget();
assert(darea != NULL);
gtk_signal_connect(GTK_OBJECT(window), "delete_event",
GTK_SIGNAL_FUNC(on_gtk_window_delete), darea);
gtk_widget_realize(window);
gtk_container_add(GTK_CONTAINER(window), darea);
gtk_widget_realize(darea);
gtk_widget_show(darea);
gtk_widget_show(window);
while (gtk_events_pending())
gtk_main_iteration();
return(retval);
} // __platformBuildStandaloneRenderer
bool __platformRendererDoEvents(void)
{
while (gtk_events_pending())
gtk_main_iteration();
return(!quit_event_caught);
} // __platformRendererDoEvents
// end of GTKTurtleSpaceRenderer.cpp ...