nuclear@0: #include <math.h>
nuclear@0: #include <assert.h>
nuclear@0: #include <GL/glut.h>
nuclear@0: #include <GL/freeglut_ext.h>
nuclear@0: #include <imago2.h>
nuclear@0: #include <drawtext.h>
nuclear@0: #include <dsys.h>
nuclear@0: 
nuclear@0: static void disp(void);
nuclear@0: static void draw_text(void);
nuclear@0: static void reshape(int x, int y);
nuclear@0: 
nuclear@0: static struct img_pixmap *curfrm;
nuclear@0: static int nfrm;
nuclear@0: static int xsz = -1, ysz;
nuclear@0: static float tsec;
nuclear@0: 
nuclear@0: static struct dsys_demo *script;
nuclear@0: 
nuclear@0: static struct dtx_font *font;
nuclear@0: 
nuclear@0: static struct {
nuclear@0: 	const char *name, *caption;
nuclear@0: 	struct dsys_event *ev;
nuclear@0: } events[] = {
nuclear@0: 	{"diffuse", "diffuse only - 1 light", 0},
nuclear@0: 	{"diffuse2", "diffuse only - 2 lights", 0},
nuclear@0: 	{"vmanip", "vertex manipulation", 0},
nuclear@0: 	{"2tone", "two-tone paint", 0},
nuclear@0: 	{"specular2", "full phong - 2 lights", 0},
nuclear@0: 	{"celshade", "cel shading", 0},
nuclear@0: 	{"sphmap", "reflection - spherical env. map", 0},
nuclear@0: 	{"cubemap", "reflection - cubic env. map", 0},
nuclear@0: 	{"refract", "relfection & refraction - cubic env. map w/fresnel", 0},
nuclear@0: 	{"distort1", "image distortion", 0},
nuclear@0: 	{"blur", "blur", 0},
nuclear@0: 	{"distort2", "image distortion (again)", 0},
nuclear@0: 	{0, 0, 0}
nuclear@0: };
nuclear@0: 
nuclear@0: 
nuclear@0: int init(void)
nuclear@0: {
nuclear@0: 	int i, argc = 1;
nuclear@0: 	char *argv[] = {"./vpost", 0};
nuclear@0: 
nuclear@0: 	if(!(font = dtx_open_font("linux-libertine.ttf", 32))) {
nuclear@0: 		fprintf(stderr, "failed to open font\n");
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(!(script = dsys_open("script"))) {
nuclear@0: 		fprintf(stderr, "failed to open script\n");
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	for(i=0; events[i].name; i++) {
nuclear@0: 		events[i].ev = dsys_event(script, events[i].name);
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	glutInit(&argc, argv);
nuclear@0: 	glutInitWindowSize(32, 32);
nuclear@0: 	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
nuclear@0: 
nuclear@0: 	glutCreateWindow("foo");
nuclear@0: 
nuclear@0: 	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
nuclear@0: 
nuclear@0: 	glutDisplayFunc(disp);
nuclear@0: 	glutReshapeFunc(reshape);
nuclear@0: 	return 0;
nuclear@0: }
nuclear@0: 
nuclear@0: void shutdown(void)
nuclear@0: {
nuclear@0: 	printf("shutdown called\n");
nuclear@0: }
nuclear@0: 
nuclear@0: int process(struct img_pixmap *frame, int frm_num, float sec)
nuclear@0: {
nuclear@0: 	curfrm = frame;
nuclear@0: 	nfrm = frm_num;
nuclear@0: 	tsec = sec;
nuclear@0: 
nuclear@0: 	if(frame->width != xsz || frame->height != ysz) {
nuclear@0: 		glutReshapeWindow(frame->width, frame->height);
nuclear@0: 	}
nuclear@0: 	glutPostRedisplay();
nuclear@0: 
nuclear@0: 	while(curfrm) {
nuclear@0: 		glutMainLoopEvent();
nuclear@0: 	}
nuclear@0: 	return 0;
nuclear@0: }
nuclear@0: 
nuclear@0: static void disp(void)
nuclear@0: {
nuclear@0: 	assert(curfrm);
nuclear@0: 	glClear(GL_COLOR_BUFFER_BIT);
nuclear@0: 
nuclear@0: 	dsys_update(script, dsys_msec_to_dtime(nfrm));
nuclear@0: 
nuclear@0: 	glDrawPixels(xsz, ysz, GL_RGB, GL_UNSIGNED_BYTE, curfrm->pixels);
nuclear@0: 
nuclear@0: 	draw_text();
nuclear@0: 
nuclear@0: 	glFlush();
nuclear@0: 	glReadPixels(0, 0, xsz, ysz, GL_RGB, GL_UNSIGNED_BYTE, curfrm->pixels);
nuclear@0: 
nuclear@0: 	glutSwapBuffers();
nuclear@0: 	curfrm = 0;
nuclear@0: 
nuclear@0: 	assert(glGetError() == GL_NO_ERROR);
nuclear@0: }
nuclear@0: 
nuclear@0: static float fade(float x)
nuclear@0: {
nuclear@0: 	x = 1.0 - (cos((x) * M_PI * 2.0) * 0.5 + 0.5);
nuclear@0: 	x *= 10.0f;
nuclear@0: 
nuclear@0: 	return x > 1.0 ? 1.0 : x;
nuclear@0: }
nuclear@0: 
nuclear@0: static void caption(const char *text, struct dsys_event *ev)
nuclear@0: {
nuclear@0: 	float t = fade(dsys_event_value(ev));
nuclear@0: 
nuclear@0: 	if(t < (1.0f / 255.0f)) {
nuclear@0: 		return;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	glMatrixMode(GL_MODELVIEW);
nuclear@0: 	glPushMatrix();
nuclear@0: 	glTranslatef(0, 40 * t - 20, 0);
nuclear@0: 
nuclear@0: 	glBegin(GL_QUADS);
nuclear@0: 	glColor4f(0.7, 0.2, 0.1, t);
nuclear@0: 	glVertex2f(0, -10);
nuclear@0: 	glVertex2f(xsz, -10);
nuclear@0: 	glVertex2f(xsz, 30);
nuclear@0: 	glVertex2f(0, 30);
nuclear@0: 	glEnd();
nuclear@0: 
nuclear@0: 	glTranslatef(20, 0, 0);
nuclear@0: 
nuclear@0: 	glColor4f(1, 1, 1, t);
nuclear@0: 	dtx_string(text);
nuclear@0: 
nuclear@0: 	glPopMatrix();
nuclear@0: }
nuclear@0: 
nuclear@0: 
nuclear@0: static void draw_text(void)
nuclear@0: {
nuclear@0: 	int i;
nuclear@0: 	dtx_use_font(font, 32);
nuclear@0: 
nuclear@0: 	glPushAttrib(GL_ENABLE_BIT);
nuclear@0: 	glEnable(GL_BLEND);
nuclear@0: 
nuclear@0: 	for(i=0; events[i].name; i++) {
nuclear@0: 		caption(events[i].caption, events[i].ev);
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	glPopAttrib();
nuclear@0: }
nuclear@0: 
nuclear@0: static void reshape(int x, int y)
nuclear@0: {
nuclear@0: 	xsz = x;
nuclear@0: 	ysz = y;
nuclear@0: 
nuclear@0: 	glViewport(0, 0, x, y);
nuclear@0: 	glMatrixMode(GL_PROJECTION);
nuclear@0: 	glLoadIdentity();
nuclear@0: 	glOrtho(0, x, y, 0, -1, 1);
nuclear@0: }