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-rw-r--r--linux/gtkglarea.c178
1 files changed, 178 insertions, 0 deletions
diff --git a/linux/gtkglarea.c b/linux/gtkglarea.c
new file mode 100644
index 0000000..2a885af
--- /dev/null
+++ b/linux/gtkglarea.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) 1997-1998 Janne Lof <jlof@mail.student.oulu.fi>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "gdkgl.h"
+#include "gtkglarea.h"
+#include <GL/gl.h>
+#include <stdarg.h>
+
+static void gtk_gl_area_class_init (GtkGLAreaClass *klass);
+static void gtk_gl_area_init (GtkGLArea *glarea);
+static void gtk_gl_area_destroy (GtkObject *object); /* change to finalize? */
+
+static GtkDrawingAreaClass *parent_class = (GtkDrawingAreaClass*)NULL;
+
+
+GtkType gtk_gl_area_get_type ()
+{
+ static GtkType gl_area_type = 0;
+
+ if (!gl_area_type)
+ {
+ GtkTypeInfo gl_area_info =
+ {
+ (gchar*)"GtkGLArea",
+ sizeof (GtkGLArea),
+ sizeof (GtkGLAreaClass),
+ (GtkClassInitFunc) gtk_gl_area_class_init,
+ (GtkObjectInitFunc) gtk_gl_area_init,
+ /* reserved_1 */ NULL,
+ /* reserved_2 */ NULL,
+ (GtkClassInitFunc) NULL
+ };
+ gl_area_type = gtk_type_unique (gtk_drawing_area_get_type (), &gl_area_info);
+ }
+ return gl_area_type;
+}
+
+static void gtk_gl_area_class_init (GtkGLAreaClass *klass)
+{
+ GtkObjectClass *object_class;
+
+ parent_class = (GtkDrawingAreaClass*)gtk_type_class(gtk_drawing_area_get_type());
+ object_class = (GtkObjectClass*) klass;
+
+ object_class->destroy = gtk_gl_area_destroy;
+}
+
+
+static void gtk_gl_area_init (GtkGLArea *gl_area)
+{
+ gl_area->glcontext = (GdkGLContext*)NULL;
+}
+
+
+
+GtkWidget* gtk_gl_area_new_vargs(GtkGLArea *share, ...)
+{
+ GtkWidget *glarea;
+ va_list ap;
+ int i;
+ gint *attrList;
+
+ va_start(ap, share);
+ i=1;
+ while (va_arg(ap, int) != GDK_GL_NONE) /* get number of arguments */
+ i++;
+ va_end(ap);
+
+ attrList = g_new(int,i);
+
+ va_start(ap,share);
+ i=0;
+ while ( (attrList[i] = va_arg(ap, int)) != GDK_GL_NONE) /* copy args to list */
+ i++;
+ va_end(ap);
+
+ glarea = gtk_gl_area_share_new(attrList, share);
+
+ g_free(attrList);
+
+ return glarea;
+}
+
+GtkWidget* gtk_gl_area_new (int *attrList)
+{
+ return gtk_gl_area_share_new(attrList, (GtkGLArea*)NULL);
+}
+
+GtkWidget* gtk_gl_area_share_new (int *attrList, GtkGLArea *share)
+{
+ GdkVisual *visual;
+ GdkGLContext *glcontext;
+ GtkGLArea *gl_area;
+
+ g_return_val_if_fail(share == NULL || GTK_IS_GL_AREA(share), (GtkWidget*)NULL);
+
+ visual = gdk_gl_choose_visual(attrList);
+ if (visual == NULL)
+ return (GtkWidget*)NULL;
+
+ glcontext = gdk_gl_context_share_new(visual, share ? share->glcontext : (GdkGLContext*)NULL , TRUE);
+ if (glcontext == NULL)
+ return (GtkWidget*)NULL;
+
+ /* use colormap and visual suitable for OpenGL rendering */
+ gtk_widget_push_colormap(gdk_colormap_new(visual,TRUE));
+ gtk_widget_push_visual(visual);
+
+ gl_area = (GtkGLArea*)gtk_type_new (gtk_gl_area_get_type());
+ gl_area->glcontext = glcontext;
+
+ /* pop back defaults */
+ gtk_widget_pop_visual();
+ gtk_widget_pop_colormap();
+
+ return GTK_WIDGET(gl_area);
+}
+
+static void
+gtk_gl_area_destroy(GtkObject *object)
+{
+ GtkGLArea *gl_area;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (GTK_IS_GL_AREA(object));
+
+ gl_area = GTK_GL_AREA(object);
+ gdk_gl_context_unref(gl_area->glcontext);
+
+ if (GTK_OBJECT_CLASS (parent_class)->destroy)
+ (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
+}
+
+
+
+
+
+
+gint gtk_gl_area_make_current(GtkGLArea *gl_area)
+{
+ g_return_val_if_fail(gl_area != NULL, FALSE);
+ g_return_val_if_fail(GTK_IS_GL_AREA (gl_area), FALSE);
+ g_return_val_if_fail(GTK_WIDGET_REALIZED(gl_area), FALSE);
+
+ return gdk_gl_make_current(GTK_WIDGET(gl_area)->window, gl_area->glcontext);
+}
+
+void gtk_gl_area_swapbuffers(GtkGLArea *gl_area)
+{
+ g_return_if_fail(gl_area != NULL);
+ g_return_if_fail(GTK_IS_GL_AREA(gl_area));
+ g_return_if_fail(GTK_WIDGET_REALIZED(gl_area));
+
+ gdk_gl_swap_buffers(GTK_WIDGET(gl_area)->window);
+}
+
+void gtk_gl_area_size (GtkGLArea *glarea, gint width, gint height)
+{
+ g_return_if_fail (glarea != NULL);
+ g_return_if_fail (GTK_IS_GL_AREA (glarea));
+
+ gtk_drawing_area_size(GTK_DRAWING_AREA(glarea), width, height);
+}