X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=example_gl.c;fp=example_gl.c;h=17ed974d0b49b35168f004d08f3d3ea8ed3ec454;hb=492a32903dd07d3736bb878e81eb95f351556bac;hp=0000000000000000000000000000000000000000;hpb=526fc352816f21f1cbfa8110262a58224c14d208;p=windtk

diff --git a/example_gl.c b/example_gl.c
new file mode 100644
index 0000000..17ed974
--- /dev/null
+++ b/example_gl.c
@@ -0,0 +1,135 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+#include "windtk.h"
+
+static void display(void);
+static void reshape(int x, int y);
+static void keypress(unsigned char key, int x, int y);
+static void keyrelease(unsigned char key, int x, int y);
+static void mouse(int bn, int st, int x, int y);
+static void motion(int x, int y);
+
+static int gfx_newcol(int r, int g, int b);
+static void gfx_color(int c);
+static void gfx_fillrect(struct wt_rect *r);
+static void gfx_line(int x0, int y0, int x1, int y1);
+
+static struct wt_graphics gfx = {
+	WT_GFX_NODIRTY,
+	gfx_newcol, gfx_color,
+	gfx_fillrect,
+	gfx_line
+};
+
+int main(int argc, char **argv)
+{
+	glutInit(&argc, argv);
+	glutInitWindowSize(800, 600);
+	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+	glutCreateWindow("windtk example");
+
+	glutDisplayFunc(display);
+	glutReshapeFunc(reshape);
+	glutKeyboardFunc(keypress);
+	glutKeyboardUpFunc(keyrelease);
+	glutMouseFunc(mouse);
+	glutMotionFunc(motion);
+	glutPassiveMotionFunc(motion);
+
+	glClearColor(0.6, 0.6, 0.6, 1);
+
+	if(wt_init(800, 600, &gfx) == -1) {
+		return 1;
+	}
+	wt_window(0, "foo", WT_WS_DEFAULT, 100, 100, 200, 200);
+
+	glutMainLoop();
+	return 0;
+}
+
+static void display(void)
+{
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	wt_draw();
+
+	glutSwapBuffers();
+}
+
+static void reshape(int x, int y)
+{
+	glViewport(0, 0, x, y);
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glOrtho(0, x, y, 0, -1, 1);
+
+	wt_viewport(0, 0, x, y);
+}
+
+static void keypress(unsigned char key, int x, int y)
+{
+	if(key == 27) exit(0);
+
+	wt_inp_key(key, 1);
+}
+
+static void keyrelease(unsigned char key, int x, int y)
+{
+	wt_inp_key(key, 0);
+}
+
+static void mouse(int bn, int st, int x, int y)
+{
+	wt_inp_mouse(bn - GLUT_LEFT_BUTTON, st == GLUT_DOWN, x, y);
+}
+
+static void motion(int x, int y)
+{
+	wt_inp_motion(x, y);
+}
+
+/* ------ graphics callbacks -------- */
+static unsigned char colors[32][3];
+static int maxcol;
+
+static int gfx_newcol(int r, int g, int b)
+{
+	int i;
+
+	for(i=0; i<maxcol; i++) {
+		if(colors[i][0] == r && colors[i][1] == g && colors[i][2] == b) {
+			return i;
+		}
+	}
+
+	if(maxcol >= 32) return -1;
+
+	colors[maxcol][0] = r;
+	colors[maxcol][1] = g;
+	colors[maxcol][2] = b;
+	return maxcol++;
+}
+
+static void gfx_color(int c)
+{
+	glColor3ubv(colors[c]);
+}
+
+static void gfx_fillrect(struct wt_rect *r)
+{
+	glBegin(GL_QUADS);
+	glVertex2f(r->x, r->y);
+	glVertex2f(r->x + r->w, r->y);
+	glVertex2f(r->x + r->w, r->y + r->h);
+	glVertex2f(r->x, r->y + r->h);
+	glEnd();
+}
+
+static void gfx_line(int x0, int y0, int x1, int y1)
+{
+	glBegin(GL_LINES);
+	glVertex2f(x0, y0);
+	glVertex2f(x1, y1);
+	glEnd();
+}