dungeon_crawler

annotate prototype/src/renderer_deferred.cc @ 72:a27528035e20

find changesets by author, revision, files, or words in the commit message
- re-organized the renderer classes a bit wrt final render-target - implemented identity color-grading palette for now - broke particle systems.... - removed multipass renderer
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 19 Oct 2012 02:45:57 +0300
parents 45172d087ebe
children
rev   line source
nuclear@41 1 #include <stdio.h>
nuclear@41 2 #include <stdlib.h>
nuclear@41 3 #include <string.h>
nuclear@41 4 #include <limits.h>
nuclear@41 5 #include "opengl.h"
nuclear@41 6 #include "renderer_deferred.h"
nuclear@41 7 #include "level.h"
nuclear@41 8 #include "sdr.h"
nuclear@41 9 #include "datapath.h"
nuclear@41 10
nuclear@41 11 static unsigned int load_sdr(const char *vfname, const char *pfname);
nuclear@65 12 static void attach_color_buffer(unsigned int fbo, int count, const unsigned int *tex);
nuclear@41 13
nuclear@41 14 DeferredRenderer::DeferredRenderer()
nuclear@41 15 {
nuclear@72 16 fbo = 0;
nuclear@41 17 for(int i=0; i<MRT_COUNT; i++) {
nuclear@41 18 mrt_tex[i] = 0;
nuclear@41 19 }
nuclear@72 20 mrt_prog = deferred_debug = deferred_omni = 0;
nuclear@41 21
nuclear@41 22 curr_prog = 0;
nuclear@60 23 num_draw_bufs = 1;
nuclear@41 24 }
nuclear@41 25
nuclear@41 26 DeferredRenderer::~DeferredRenderer()
nuclear@41 27 {
nuclear@41 28 if(mrt_prog) {
nuclear@41 29 free_program(mrt_prog);
nuclear@41 30 }
nuclear@41 31 if(deferred_omni) {
nuclear@41 32 free_program(deferred_omni);
nuclear@41 33 }
nuclear@41 34 if(deferred_debug) {
nuclear@41 35 free_program(deferred_debug);
nuclear@41 36 }
nuclear@41 37
nuclear@41 38 if(mrt_tex[0]) {
nuclear@41 39 glDeleteTextures(MRT_COUNT, mrt_tex);
nuclear@41 40 }
nuclear@41 41 }
nuclear@41 42
nuclear@41 43 bool DeferredRenderer::init(int xsz, int ysz)
nuclear@41 44 {
nuclear@72 45 if(!Renderer::init(xsz, ysz)) {
nuclear@72 46 return false;
nuclear@72 47 }
nuclear@41 48
nuclear@41 49 if(!GLEW_ARB_texture_float) {
nuclear@69 50 fprintf(stderr, "%s: error: no floating point texture support\n", __FUNCTION__);
nuclear@41 51 return false;
nuclear@41 52 }
nuclear@41 53 if(!GLEW_ARB_draw_buffers) {
nuclear@69 54 fprintf(stderr, "%s: error: no multiple render target support\n", __FUNCTION__);
nuclear@41 55 return false;
nuclear@41 56 }
nuclear@41 57
nuclear@41 58 int max_draw_buf;
nuclear@41 59 glGetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &max_draw_buf);
nuclear@41 60 printf("max draw buffers: %d\n", max_draw_buf);
nuclear@41 61 if(max_draw_buf < MRT_COUNT) {
nuclear@69 62 fprintf(stderr, "%s: error: not enough draw buffers (%d), %d required\n", __FUNCTION__, max_draw_buf, MRT_COUNT);
nuclear@41 63 return false;
nuclear@41 64 }
nuclear@60 65 num_draw_bufs = MRT_COUNT;
nuclear@41 66
nuclear@41 67 if(!(mrt_prog = load_sdr("mrt.v.glsl", "mrt.p.glsl"))) {
nuclear@41 68 return false;
nuclear@41 69 }
nuclear@41 70 set_uniform_int(mrt_prog, "tex_dif", 0);
nuclear@41 71 set_uniform_int(mrt_prog, "tex_norm", 1);
nuclear@41 72
nuclear@41 73 if(!(deferred_omni = load_sdr("deferred_omni.v.glsl", "deferred_omni.p.glsl"))) {
nuclear@41 74 return false;
nuclear@41 75 }
nuclear@41 76 for(int i=0; i<MRT_COUNT; i++) {
nuclear@41 77 char uname[32];
nuclear@41 78 sprintf(uname, "mrt%d", i);
nuclear@41 79 set_uniform_int(deferred_omni, uname, i);
nuclear@41 80 }
nuclear@41 81
nuclear@41 82 return true;
nuclear@41 83 }
nuclear@41 84
nuclear@41 85 int DeferredRenderer::get_tangent_location() const
nuclear@41 86 {
nuclear@41 87 return get_attrib_loc(mrt_prog, "attr_tangent");
nuclear@41 88 }
nuclear@41 89
nuclear@41 90 unsigned int DeferredRenderer::get_current_program() const
nuclear@41 91 {
nuclear@41 92 return curr_prog;
nuclear@41 93 }
nuclear@41 94
nuclear@41 95 void DeferredRenderer::resize(int xsz, int ysz)
nuclear@41 96 {
nuclear@72 97 // keep a copy of the previous texture size because Renderer::resize may change it
nuclear@72 98
nuclear@72 99 int prev_tex_xsz = tex_xsz;
nuclear@72 100 int prev_tex_ysz = tex_ysz;
nuclear@72 101
nuclear@72 102 Renderer::resize(xsz, ysz);
nuclear@41 103
nuclear@41 104 // if we need a bigger rendertarget ...
nuclear@72 105 if(xsz > prev_tex_xsz || ysz > prev_tex_ysz) {
nuclear@41 106 // ... resize all the color buffers
nuclear@41 107 for(int i=0; i<MRT_COUNT; i++) {
nuclear@41 108 glBindTexture(GL_TEXTURE_2D, mrt_tex[i]);
nuclear@41 109 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, tex_xsz, tex_ysz, 0, GL_RGBA, GL_FLOAT, 0);
nuclear@41 110 }
nuclear@41 111 }
nuclear@41 112
nuclear@41 113 // update the texture coordinate scaling factors
nuclear@41 114 float tex_scale_x = (float)width / tex_xsz;
nuclear@41 115 float tex_scale_y = (float)height / tex_ysz;
nuclear@41 116
nuclear@41 117 set_uniform_float2(deferred_omni, "tex_scale", tex_scale_x, tex_scale_y);
nuclear@41 118 set_uniform_float2(deferred_omni, "fb_size", width, height);
nuclear@41 119 }
nuclear@41 120
nuclear@41 121 void DeferredRenderer::render(const Level *level) const
nuclear@41 122 {
nuclear@62 123 render_pre(level);
nuclear@62 124
nuclear@41 125 // render into the MRT buffers
nuclear@41 126 glUseProgram(mrt_prog);
nuclear@41 127 curr_prog = mrt_prog;
nuclear@41 128
nuclear@41 129 glBindFramebufferEXT(GL_FRAMEBUFFER, fbo);
nuclear@65 130 attach_color_buffer(fbo, num_draw_bufs, mrt_tex);
nuclear@41 131
nuclear@41 132 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@41 133 level->draw();
nuclear@65 134
nuclear@65 135 attach_color_buffer(fbo, 1, &rend_tex);
nuclear@65 136 glClear(GL_COLOR_BUFFER_BIT);
nuclear@41 137
nuclear@41 138 // post-process lighting
nuclear@60 139 light_pass(level);
nuclear@60 140
nuclear@60 141 glUseProgram(0);
nuclear@60 142 curr_prog = 0;
nuclear@62 143
nuclear@62 144 render_post(level);
nuclear@65 145
nuclear@65 146 glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
nuclear@60 147 }
nuclear@60 148
nuclear@60 149 void DeferredRenderer::light_pass(const Level *level) const
nuclear@60 150 {
nuclear@65 151 glPushAttrib(GL_ENABLE_BIT | GL_POLYGON_BIT | GL_TEXTURE_BIT);
nuclear@41 152
nuclear@41 153 glEnable(GL_BLEND);
nuclear@41 154 glBlendFunc(GL_ONE, GL_ONE);
nuclear@41 155
nuclear@41 156 glDisable(GL_LIGHTING);
nuclear@41 157 glDisable(GL_DEPTH_TEST);
nuclear@41 158 glCullFace(GL_FRONT);
nuclear@41 159
nuclear@41 160 glUseProgram(deferred_omni);
nuclear@41 161 curr_prog = deferred_omni;
nuclear@41 162
nuclear@41 163 for(int i=0; i<MRT_COUNT; i++) {
nuclear@41 164 glActiveTexture(GL_TEXTURE0 + i);
nuclear@41 165 glBindTexture(GL_TEXTURE_2D, mrt_tex[i]);
nuclear@41 166 glEnable(GL_TEXTURE_2D);
nuclear@41 167 }
nuclear@41 168
nuclear@41 169 glDepthMask(0);
nuclear@41 170 level->draw_lights();
nuclear@41 171 glDepthMask(1);
nuclear@41 172
nuclear@41 173 for(int i=0; i<MRT_COUNT; i++) {
nuclear@41 174 glActiveTexture(GL_TEXTURE0 + MRT_COUNT - i - 1);
nuclear@41 175 glDisable(GL_TEXTURE_2D);
nuclear@41 176 }
nuclear@41 177
nuclear@41 178 glPopAttrib();
nuclear@41 179 }
nuclear@41 180
nuclear@41 181 static const char *fbstname[] = {
nuclear@41 182 "GL_FRAMEBUFFER_COMPLETE",
nuclear@41 183 "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT",
nuclear@41 184 "GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT",
nuclear@41 185 "no such fbo error",
nuclear@41 186 "GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS",
nuclear@41 187 "GL_FRAMEBUFFER_INCOMPLETE_FORMATS",
nuclear@41 188 "GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER",
nuclear@41 189 "GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER",
nuclear@41 190 "GL_FRAMEBUFFER_UNSUPPORTED"
nuclear@41 191 };
nuclear@41 192
nuclear@72 193 bool DeferredRenderer::create_rtarg()
nuclear@41 194 {
nuclear@72 195 if(!Renderer::create_rtarg()) {
nuclear@72 196 return false;
nuclear@72 197 }
nuclear@72 198
nuclear@41 199 unsigned int clamp = GLEW_ARB_texture_border_clamp ? GL_CLAMP_TO_EDGE : GL_CLAMP;
nuclear@41 200
nuclear@41 201 glBindFramebufferEXT(GL_FRAMEBUFFER, fbo);
nuclear@41 202
nuclear@41 203 glGenTextures(MRT_COUNT, mrt_tex);
nuclear@41 204 for(int i=0; i<MRT_COUNT; i++) {
nuclear@41 205 glBindTexture(GL_TEXTURE_2D, mrt_tex[i]);
nuclear@41 206 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, clamp);
nuclear@41 207 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, clamp);
nuclear@41 208 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
nuclear@41 209 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
nuclear@41 210 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, tex_xsz, tex_ysz, 0, GL_RGBA, GL_FLOAT, 0);
nuclear@41 211
nuclear@41 212 // attach to fbo
nuclear@62 213 GLenum color_att = GL_COLOR_ATTACHMENT0 + (num_draw_bufs == MRT_COUNT ? i : 0);
nuclear@62 214 glFramebufferTexture2DEXT(GL_FRAMEBUFFER, color_att, GL_TEXTURE_2D, mrt_tex[i], 0);
nuclear@41 215 CHECKGLERR;
nuclear@41 216 }
nuclear@41 217
nuclear@41 218 int fbst = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER);
nuclear@41 219 if(fbst != GL_FRAMEBUFFER_COMPLETE) {
nuclear@41 220 fprintf(stderr, "incomplete fbo: %u (%s)\n", fbo, fbstname[fbst - GL_FRAMEBUFFER_COMPLETE]);
nuclear@41 221 return false;
nuclear@41 222 }
nuclear@41 223 CHECKGLERR;
nuclear@41 224
nuclear@41 225 glBindFramebufferEXT(GL_FRAMEBUFFER, 0);
nuclear@41 226 return true;
nuclear@41 227 }
nuclear@41 228
nuclear@41 229 static unsigned int load_sdr(const char *vfname, const char *pfname)
nuclear@41 230 {
nuclear@41 231 unsigned int prog;
nuclear@41 232
nuclear@63 233 std::string vsfile = datafile_path(vfname);
nuclear@63 234 std::string psfile = datafile_path(pfname);
nuclear@63 235
nuclear@63 236 const char *vs = vsfile.empty() ? 0 : vsfile.c_str();
nuclear@63 237 const char *ps = psfile.empty() ? 0 : psfile.c_str();
nuclear@63 238
nuclear@63 239 if(!(prog = create_program_load(vs, ps))) {
nuclear@63 240 fprintf(stderr, "failed to load shader program (%s, %s)\n", vs, ps);
nuclear@41 241 return 0;
nuclear@41 242 }
nuclear@41 243 return prog;
nuclear@41 244 }
nuclear@41 245
nuclear@65 246 static void attach_color_buffer(unsigned int fbo, int count, const unsigned int *tex)
nuclear@65 247 {
nuclear@65 248 glBindFramebufferEXT(GL_FRAMEBUFFER, fbo);
nuclear@65 249
nuclear@65 250 for(int i=0; i<count; i++) {
nuclear@65 251 GLenum color_att = GL_COLOR_ATTACHMENT0 + i;
nuclear@65 252 glFramebufferTexture2DEXT(GL_FRAMEBUFFER, color_att, GL_TEXTURE_2D, tex[i], 0);
nuclear@65 253 CHECKGLERR;
nuclear@65 254 }
nuclear@65 255
nuclear@65 256 static GLenum draw_bufs[] = {
nuclear@65 257 GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT,
nuclear@65 258 GL_COLOR_ATTACHMENT2_EXT, GL_COLOR_ATTACHMENT3_EXT,
nuclear@65 259 GL_COLOR_ATTACHMENT4_EXT, GL_COLOR_ATTACHMENT5_EXT,
nuclear@65 260 GL_COLOR_ATTACHMENT6_EXT, GL_COLOR_ATTACHMENT7_EXT
nuclear@65 261 };
nuclear@65 262 glDrawBuffersARB(count, draw_bufs);
nuclear@65 263 }
nuclear@65 264
nuclear@41 265 #ifdef DBG_VIS_MRT
nuclear@41 266 // visualize the MRT buffers
nuclear@41 267 static void draw_deferred_debug()
nuclear@41 268 {
nuclear@41 269 glPushAttrib(GL_ENABLE_BIT | GL_POLYGON_BIT);
nuclear@41 270 glUseProgram(deferred_debug);
nuclear@41 271 glDisable(GL_DEPTH_TEST);
nuclear@41 272
nuclear@41 273 glMatrixMode(GL_PROJECTION);
nuclear@41 274 glPushMatrix();
nuclear@41 275 glLoadIdentity();
nuclear@41 276 glMatrixMode(GL_MODELVIEW);
nuclear@41 277 glPushMatrix();
nuclear@41 278 glLoadIdentity();
nuclear@41 279
nuclear@41 280 for(int i=0; i<MRT_COUNT; i++) {
nuclear@41 281 glActiveTexture(GL_TEXTURE0 + i);
nuclear@41 282 glBindTexture(GL_TEXTURE_2D, mrt_tex[i]);
nuclear@41 283 glEnable(GL_TEXTURE_2D);
nuclear@41 284 }
nuclear@41 285
nuclear@41 286 glBegin(GL_QUADS);
nuclear@41 287 glTexCoord2f(0, 0);
nuclear@41 288 glVertex2f(-1, -1);
nuclear@41 289 glTexCoord2f(1, 0);
nuclear@41 290 glVertex2f(1, -1);
nuclear@41 291 glTexCoord2f(1, 1);
nuclear@41 292 glVertex2f(1, 1);
nuclear@41 293 glTexCoord2f(0, 1);
nuclear@41 294 glVertex2f(-1, 1);
nuclear@41 295 glEnd();
nuclear@41 296
nuclear@41 297 for(int i=0; i<MRT_COUNT; i++) {
nuclear@41 298 glActiveTexture(GL_TEXTURE0 + MRT_COUNT - i - 1);
nuclear@41 299 glDisable(GL_TEXTURE_2D);
nuclear@41 300 }
nuclear@41 301
nuclear@41 302 glMatrixMode(GL_PROJECTION);
nuclear@41 303 glPopMatrix();
nuclear@41 304 glMatrixMode(GL_MODELVIEW);
nuclear@41 305 glPopMatrix();
nuclear@41 306
nuclear@41 307 glUseProgram(0);
nuclear@41 308 glPopAttrib();
nuclear@41 309 }
nuclear@41 310 #endif