dungeon_crawler

annotate prototype/src/renderer_multipass.cc @ 60:aa86119e3295

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added multipass deferred
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 25 Sep 2012 06:19:37 +0300
parents
children f71381c9e245
rev   line source
nuclear@60 1 #include <stdio.h>
nuclear@60 2 #include <stdlib.h>
nuclear@60 3 #include <string.h>
nuclear@60 4 #include "opengl.h"
nuclear@60 5 #include "renderer_multipass.h"
nuclear@60 6 #include "level.h"
nuclear@60 7 #include "sdr.h"
nuclear@60 8 #include "datapath.h"
nuclear@60 9
nuclear@60 10 static unsigned int load_sdr(const char *vfname, const char *pfname);
nuclear@60 11
nuclear@60 12
nuclear@60 13 MultipassRenderer::MultipassRenderer()
nuclear@60 14 {
nuclear@60 15 for(int i=0; i<MRT_COUNT; i++) {
nuclear@60 16 rt_prog[i] = 0;
nuclear@60 17 }
nuclear@60 18 }
nuclear@60 19
nuclear@60 20 MultipassRenderer::~MultipassRenderer()
nuclear@60 21 {
nuclear@60 22 for(int i=0; i<MRT_COUNT; i++) {
nuclear@60 23 if(rt_prog[i]) {
nuclear@60 24 free_program(rt_prog[i]);
nuclear@60 25 }
nuclear@60 26 }
nuclear@60 27 }
nuclear@60 28
nuclear@60 29 bool MultipassRenderer::init(int xsz, int ysz)
nuclear@60 30 {
nuclear@60 31 width = xsz;
nuclear@60 32 height = ysz;
nuclear@60 33
nuclear@60 34 if(!GLEW_ARB_texture_float) {
nuclear@60 35 fprintf(stderr, "%s: error: no floating point texture support\n", __func__);
nuclear@60 36 return false;
nuclear@60 37 }
nuclear@60 38
nuclear@60 39 if(!create_fbo()) {
nuclear@60 40 return false;
nuclear@60 41 }
nuclear@60 42
nuclear@60 43 for(int i=0; i<MRT_COUNT; i++) {
nuclear@60 44 char fname[128];
nuclear@60 45 sprintf(fname, "multi%d.p.glsl", i);
nuclear@60 46
nuclear@60 47 if(!(rt_prog[i] = load_sdr("mrt.v.glsl", fname))) {
nuclear@60 48 return false;
nuclear@60 49 }
nuclear@60 50 set_uniform_int(rt_prog[i], "tex_dif", 0);
nuclear@60 51 set_uniform_int(rt_prog[i], "tex_norm", 1);
nuclear@60 52 }
nuclear@60 53
nuclear@60 54 if(!(deferred_omni = load_sdr("deferred_omni.v.glsl", "deferred_omni.p.glsl"))) {
nuclear@60 55 return false;
nuclear@60 56 }
nuclear@60 57 for(int i=0; i<MRT_COUNT; i++) {
nuclear@60 58 char uname[32];
nuclear@60 59 sprintf(uname, "mrt%d", i);
nuclear@60 60 set_uniform_int(deferred_omni, uname, i);
nuclear@60 61 }
nuclear@60 62
nuclear@60 63 rend = this;
nuclear@60 64 return true;
nuclear@60 65 }
nuclear@60 66
nuclear@60 67 int MultipassRenderer::get_tangent_location() const
nuclear@60 68 {
nuclear@60 69 if(!curr_prog) {
nuclear@60 70 return -1;
nuclear@60 71 }
nuclear@60 72 return get_attrib_loc(curr_prog, "attr_tangent");
nuclear@60 73 }
nuclear@60 74
nuclear@60 75 void MultipassRenderer::render(const Level *level) const
nuclear@60 76 {
nuclear@60 77 // render into the MRT buffers
nuclear@60 78 glBindFramebufferEXT(GL_FRAMEBUFFER, fbo);
nuclear@60 79
nuclear@60 80 for(int i=0; i<MRT_COUNT; i++) {
nuclear@60 81 glUseProgram(rt_prog[i]);
nuclear@60 82 curr_prog = rt_prog[i];
nuclear@60 83
nuclear@60 84 glFramebufferTexture2DEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
nuclear@60 85 mrt_tex[i], 0);
nuclear@60 86
nuclear@60 87 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@60 88 level->draw();
nuclear@60 89 }
nuclear@60 90 glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
nuclear@60 91
nuclear@60 92 // post-process lighting
nuclear@60 93 light_pass(level);
nuclear@60 94
nuclear@60 95 glUseProgram(0);
nuclear@60 96 curr_prog = 0;
nuclear@60 97 }
nuclear@60 98
nuclear@60 99 static unsigned int load_sdr(const char *vfname, const char *pfname)
nuclear@60 100 {
nuclear@60 101 char vsfile[PATH_MAX], psfile[PATH_MAX];
nuclear@60 102 const char *fname;
nuclear@60 103 unsigned int prog;
nuclear@60 104
nuclear@60 105 if((fname = datafile_path(vfname))) {
nuclear@60 106 strcpy(vsfile, fname);
nuclear@60 107 } else {
nuclear@60 108 vsfile[0] = 0;
nuclear@60 109 }
nuclear@60 110 if((fname = datafile_path(pfname))) {
nuclear@60 111 strcpy(psfile, fname);
nuclear@60 112 } else {
nuclear@60 113 psfile[0] = 0;
nuclear@60 114 }
nuclear@60 115 if(!(prog = create_program_load(vsfile, psfile))) {
nuclear@60 116 fprintf(stderr, "failed to load shader program (%s, %s)\n", vsfile, psfile);
nuclear@60 117 return 0;
nuclear@60 118 }
nuclear@60 119 return prog;
nuclear@60 120 }