nuclear@14: #include <string.h>
nuclear@17: #include <stdarg.h>
nuclear@9: #include "renderer.h"
nuclear@14: #include "rayzor.h"
nuclear@15: #include "scene.h"
nuclear@14: #include "keyb.h"
nuclear@14: #include "scrman.h"
nuclear@15: #include "timer.h"
nuclear@15: #include "logger.h"
nuclear@17: #include "raytrace.h"
nuclear@17: 
nuclear@17: enum {
nuclear@17: 	MSG_START,
nuclear@17: 	MSG_GAMMA,
nuclear@17: 	MSG_USE_GAMMA,
nuclear@17: 
nuclear@17: 	NUM_MESSAGES
nuclear@17: };
nuclear@14: 
nuclear@14: struct RendererImpl {
nuclear@14: 	bool in_progress;
nuclear@14: 	int cur_x, cur_y;	// current pixel being rendered
nuclear@15: 
nuclear@15: 	uint32_t *pixels;
nuclear@15: 
nuclear@17: 	float gamma, inv_gamma;
nuclear@17: 	bool use_gamma;
nuclear@17: 
nuclear@17: 	MsgAtom msg[NUM_MESSAGES];
nuclear@14: };
nuclear@9: 
nuclear@15: 
nuclear@9: Renderer::Renderer()
nuclear@9: {
nuclear@9: 	set_name("renderer");
nuclear@9: }
nuclear@9: 
nuclear@14: bool Renderer::init()
nuclear@14: {
nuclear@14: 	rend = new RendererImpl;
nuclear@14: 	memset(rend, 0, sizeof *rend);
nuclear@15: 
nuclear@15: 	rend->pixels = new uint32_t[fb_width * fb_height];
nuclear@15: 	if(!rend->pixels) {
nuclear@15: 		return false;
nuclear@15: 	}
nuclear@15: 	memset(rend->pixels, 0, fb_width * fb_height * 4);
nuclear@15: 
nuclear@17: 	rend->gamma = 1.8;
nuclear@17: 	rend->inv_gamma = 1.0 / rend->gamma;
nuclear@17: 	rend->use_gamma = true;
nuclear@17: 
nuclear@17: 	rend->msg[MSG_START] = message_atom("start");
nuclear@17: 	rend->msg[MSG_GAMMA] = message_atom("gamma");
nuclear@17: 	rend->msg[MSG_USE_GAMMA] = message_atom("use-gamma");
nuclear@15: 
nuclear@14: 	return true;
nuclear@14: }
nuclear@14: 
nuclear@14: void Renderer::shutdown()
nuclear@14: {
nuclear@14: 	if(rend) {
nuclear@15: 		delete [] rend->pixels;
nuclear@14: 		delete rend;
nuclear@14: 		rend = 0;
nuclear@14: 	}
nuclear@14: }
nuclear@14: 
nuclear@9: void Renderer::draw() const
nuclear@9: {
nuclear@15: 	Camera *cam = scene->get_active_camera();
nuclear@15: 
nuclear@15: 	// if a rendering is not in progress, just show the last buffer
nuclear@15: 	if(!rend->in_progress || !cam) {
nuclear@15: 		memcpy(fb_pixels, rend->pixels, fb_width * fb_height * 4);
nuclear@15: 		return;
nuclear@15: 	}
nuclear@15: 
nuclear@15: 	// render for approximately half a second, then show and return
nuclear@15: 	unsigned long start = get_msec();
nuclear@15: 	uint32_t *dest = rend->pixels + rend->cur_y * fb_width + rend->cur_x;
nuclear@15: 
nuclear@15: 	for(;;) {
nuclear@15: 		Ray ray = cam->get_primary_ray(rend->cur_x, rend->cur_y);
nuclear@15: 		Vector3 color = ray_trace(ray);
nuclear@15: 
nuclear@17: 		// gamma-correct before storing the pixel
nuclear@17: 		if(rend->use_gamma) {
nuclear@17: 			color.x = pow(color.x, rend->inv_gamma);
nuclear@17: 			color.y = pow(color.y, rend->inv_gamma);
nuclear@17: 			color.z = pow(color.z, rend->inv_gamma);
nuclear@17: 		}
nuclear@17: 
nuclear@15: 		int r = color.x > 1.0 ? 255 : (int)(color.x * 255.0);
nuclear@15: 		int g = color.y > 1.0 ? 255 : (int)(color.y * 255.0);
nuclear@15: 		int b = color.z > 1.0 ? 255 : (int)(color.z * 255.0);
nuclear@15: 
nuclear@15: 		*dest++ = (r << 16) | (g << 8) | b;
nuclear@15: 
nuclear@15: 		if(++rend->cur_x >= fb_width) {
nuclear@15: 			rend->cur_x = 0;
nuclear@15: 			if(++rend->cur_y >= fb_height) {
nuclear@15: 				rend->in_progress = false;
nuclear@15: 				printlog("done!\n");
nuclear@15: 				break;
nuclear@15: 			}
nuclear@15: 		}
nuclear@15: 
nuclear@15: 		if(get_msec() - start >= 500) {
nuclear@15: 			break;
nuclear@15: 		}
nuclear@15: 	}
nuclear@15: 
nuclear@15: 	memcpy(fb_pixels, rend->pixels, fb_width * fb_height * 4);
nuclear@9: }
nuclear@14: 
nuclear@14: void Renderer::handle_keyboard(int key, bool press)
nuclear@14: {
nuclear@14: 	switch(key) {
nuclear@14: 	case KB_ESC:
nuclear@14: 		deactivate_screen();
nuclear@14: 		break;
nuclear@14: 
nuclear@15: 	default:
nuclear@15: 		break;
nuclear@14: 	}
nuclear@14: }
nuclear@15: 
nuclear@17: void Renderer::message(MsgAtom msg, ...)
nuclear@15: {
nuclear@17: 	va_list ap;
nuclear@17: 	va_start(ap, msg);
nuclear@15: 
nuclear@17: 	for(int i=0; i<NUM_MESSAGES; i++) {
nuclear@17: 		if(msg == rend->msg[i]) {
nuclear@17: 			switch(i) {
nuclear@17: 			case MSG_START:
nuclear@17: 				rend->cur_x = rend->cur_y = 0;
nuclear@17: 				rend->in_progress = true;
nuclear@17: 				memset(rend->pixels, 0, fb_width * fb_height * 4);
nuclear@17: 
nuclear@17: 				printlog("starting a new rendering!\n");
nuclear@17: 				break;
nuclear@17: 
nuclear@17: 			case MSG_GAMMA:
nuclear@18: 				rend->gamma = va_arg(ap, double);
nuclear@17: 				rend->inv_gamma = 1.0 / rend->gamma;
nuclear@17: 				break;
nuclear@17: 
nuclear@17: 			case MSG_USE_GAMMA:
nuclear@18: 				rend->use_gamma = va_arg(ap, int);
nuclear@17: 				break;
nuclear@17: 			}
nuclear@17: 		}
nuclear@15: 	}
nuclear@17: 
nuclear@17: 	va_end(ap);
nuclear@15: }