nuclear@60: #include <stdio.h>
nuclear@60: #include <stdlib.h>
nuclear@60: #include <string.h>
nuclear@60: #include "opengl.h"
nuclear@60: #include "renderer_multipass.h"
nuclear@60: #include "level.h"
nuclear@60: #include "sdr.h"
nuclear@60: #include "datapath.h"
nuclear@60: 
nuclear@60: static unsigned int load_sdr(const char *vfname, const char *pfname);
nuclear@60: 
nuclear@60: 
nuclear@60: MultipassRenderer::MultipassRenderer()
nuclear@60: {
nuclear@60: 	for(int i=0; i<MRT_COUNT; i++) {
nuclear@60: 		rt_prog[i] = 0;
nuclear@60: 	}
nuclear@60: }
nuclear@60: 
nuclear@60: MultipassRenderer::~MultipassRenderer()
nuclear@60: {
nuclear@60: 	for(int i=0; i<MRT_COUNT; i++) {
nuclear@60: 		if(rt_prog[i]) {
nuclear@60: 			free_program(rt_prog[i]);
nuclear@60: 		}
nuclear@60: 	}
nuclear@60: }
nuclear@60: 
nuclear@60: bool MultipassRenderer::init(int xsz, int ysz)
nuclear@60: {
nuclear@60: 	width = xsz;
nuclear@60: 	height = ysz;
nuclear@60: 
nuclear@60: 	if(!GLEW_ARB_texture_float) {
nuclear@60: 		fprintf(stderr, "%s: error: no floating point texture support\n", __func__);
nuclear@60: 		return false;
nuclear@60: 	}
nuclear@60: 
nuclear@60: 	if(!create_fbo()) {
nuclear@60: 		return false;
nuclear@60: 	}
nuclear@60: 
nuclear@60: 	for(int i=0; i<MRT_COUNT; i++) {
nuclear@60: 		char fname[128];
nuclear@60: 		sprintf(fname, "multi%d.p.glsl", i);
nuclear@60: 
nuclear@60: 		if(!(rt_prog[i] = load_sdr("mrt.v.glsl", fname))) {
nuclear@60: 			return false;
nuclear@60: 		}
nuclear@60: 		set_uniform_int(rt_prog[i], "tex_dif", 0);
nuclear@60: 		set_uniform_int(rt_prog[i], "tex_norm", 1);
nuclear@60: 	}
nuclear@60: 
nuclear@60: 	if(!(deferred_omni = load_sdr("deferred_omni.v.glsl", "deferred_omni.p.glsl"))) {
nuclear@60: 		return false;
nuclear@60: 	}
nuclear@60: 	for(int i=0; i<MRT_COUNT; i++) {
nuclear@60: 		char uname[32];
nuclear@60: 		sprintf(uname, "mrt%d", i);
nuclear@60: 		set_uniform_int(deferred_omni, uname, i);
nuclear@60: 	}
nuclear@60: 
nuclear@60: 	rend = this;
nuclear@60: 	return true;
nuclear@60: }
nuclear@60: 
nuclear@60: int MultipassRenderer::get_tangent_location() const
nuclear@60: {
nuclear@60: 	if(!curr_prog) {
nuclear@60: 		return -1;
nuclear@60: 	}
nuclear@60: 	return get_attrib_loc(curr_prog, "attr_tangent");
nuclear@60: }
nuclear@60: 
nuclear@60: void MultipassRenderer::render(const Level *level) const
nuclear@60: {
nuclear@60: 	// render into the MRT buffers
nuclear@60: 	glBindFramebufferEXT(GL_FRAMEBUFFER, fbo);
nuclear@60: 
nuclear@60: 	for(int i=0; i<MRT_COUNT; i++) {
nuclear@60: 		glUseProgram(rt_prog[i]);
nuclear@60: 		curr_prog = rt_prog[i];
nuclear@60: 
nuclear@60: 		glFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
nuclear@60: 				mrt_tex[i], 0);
nuclear@60: 
nuclear@60: 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@60: 		level->draw();
nuclear@60: 	}
nuclear@60: 	glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
nuclear@60: 
nuclear@60: 	// post-process lighting
nuclear@60: 	light_pass(level);
nuclear@60: 
nuclear@60: 	glUseProgram(0);
nuclear@60: 	curr_prog = 0;
nuclear@60: }
nuclear@60: 
nuclear@60: static unsigned int load_sdr(const char *vfname, const char *pfname)
nuclear@60: {
nuclear@60: 	char vsfile[PATH_MAX], psfile[PATH_MAX];
nuclear@60: 	const char *fname;
nuclear@60: 	unsigned int prog;
nuclear@60: 
nuclear@60: 	if((fname = datafile_path(vfname))) {
nuclear@60: 		strcpy(vsfile, fname);
nuclear@60: 	} else {
nuclear@60: 		vsfile[0] = 0;
nuclear@60: 	}
nuclear@60: 	if((fname = datafile_path(pfname))) {
nuclear@60: 		strcpy(psfile, fname);
nuclear@60: 	} else {
nuclear@60: 		psfile[0] = 0;
nuclear@60: 	}
nuclear@60: 	if(!(prog = create_program_load(vsfile, psfile))) {
nuclear@60: 		fprintf(stderr, "failed to load shader program (%s, %s)\n", vsfile, psfile);
nuclear@60: 		return 0;
nuclear@60: 	}
nuclear@60: 	return prog;
nuclear@60: }