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#include "program.h"
#include <GL/gl.h>
static void realize(GtkWidget* widget, gpointer data)
{
#if 0
GdkGLContext* context = gtk_widget_get_gl_context(widget);
GdkGLDrawable* drawable = gtk_widget_get_gl_drawable(widget);
(void)data;
if (!gdk_gl_drawable_gl_begin(drawable, context))
return;
gdk_gl_drawable_gl_end(drawable);
#else
(void)widget;
(void)data;
#endif
}
static gboolean configure(GtkWidget* widget, GdkEventConfigure* e, gpointer data)
{
#if 0
GdkGLContext* context = gtk_widget_get_gl_context(widget);
GdkGLDrawable* drawable = gtk_widget_get_gl_drawable(widget);
(void)data;
(void)e;
if (!gdk_gl_drawable_gl_begin(drawable, context))
return FALSE;
gdk_gl_drawable_gl_end (drawable);
#else
(void)widget;
(void)data;
(void)e;
#endif
return TRUE;
}
static void draw_tri(struct program *p)
{
glClearColor(0.3, 0.1, 0.3, 0.5);
glViewport(0, 0, (GLint)p->draw.width, (GLint)p->draw.height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
glMatrixMode(GL_MODELVIEW);
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_TRIANGLES);
glColor3f(.8,0,0);
glVertex3f(-0.9, -0.9, -30.0);
glColor3f(0,.9,0);
glVertex3f( 0.9, -0.9, -30.0);
glColor3f(0,0,.7);
glVertex3f( 0.0, 0.9, -30.0);
glEnd();
}
gboolean draw_gl_begin(struct program *p)
{
GtkWidget *widget = GTK_WIDGET(p->main.draw);
GdkGLContext* context = gtk_widget_get_gl_context(widget);
GdkGLDrawable* drawable = gtk_widget_get_gl_drawable(widget);
return gdk_gl_drawable_gl_begin(drawable, context);
}
void draw_gl_end(struct program *p)
{
GtkWidget *widget = GTK_WIDGET(p->main.draw);
GdkGLDrawable* drawable = gtk_widget_get_gl_drawable(widget);
gdk_gl_drawable_gl_end(drawable);
}
void draw_ortho_top_left(struct program *p)
{
glViewport(0, 0, (GLint)p->draw.width, (GLint)p->draw.height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, p->draw.width, p->draw.height, 0.0, -0.5, 1000.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void draw_checker(guint width, guint height, struct program *p)
{
int x;
int y;
int i;
glClearColor(0.3, 0.3, 0.3, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(.8,.8,.8);
glBegin(GL_QUADS);
for (i = 0, x = 0; x < (int)p->draw.width; i++) {
x = (width * i) - (width / 2);
y = ((i % 2) * height) - (height / 2);
for (; y < (int)p->draw.height; y += height * 2) {
glVertex3f( x + 0.0, y + height, -30.0);
glVertex3f( x + width, y + height, -30.0);
glVertex3f( x + width, y + 0.0, -30.0);
glVertex3f( x + 0.0, y + 0.0, -30.0);
}
}
glEnd();
}
static gboolean expose(GtkWidget* widget, GdkEventExpose* e, gpointer data)
{
struct program *p = (struct program *)data;
GdkGLContext* context = gtk_widget_get_gl_context(widget);
GdkGLDrawable* drawable = gtk_widget_get_gl_drawable(widget);
(void)e;
p->draw.width = widget->allocation.width;
p->draw.height = widget->allocation.height;
if (!gdk_gl_drawable_gl_begin(drawable, context))
return FALSE;
if (p->selected.type == TYPE_TEXTURE)
texture_draw(p);
else
draw_tri(p);
if (gdk_gl_drawable_is_double_buffered (drawable))
gdk_gl_drawable_swap_buffers(drawable);
else
glFlush();
gdk_gl_drawable_gl_end(drawable);
return TRUE;
}
void draw_setup(GtkDrawingArea *draw, struct program *p)
{
GObject *obj = G_OBJECT(draw);
gtk_widget_set_gl_capability(GTK_WIDGET(draw), p->draw.config, NULL,
TRUE, GDK_GL_RGBA_TYPE);
g_signal_connect_after(obj, "realize", G_CALLBACK(realize), p);
g_signal_connect(obj, "configure-event", G_CALLBACK(configure), p);
g_signal_connect(obj, "expose-event", G_CALLBACK(expose), p);
}
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