git.cworth.org Git - apitrace/blob - glstate.py

   1 ##########################################################################
   2 #
   3 # Copyright 2011 Jose Fonseca
   4 # All Rights Reserved.
   5 #
   6 # Permission is hereby granted, free of charge, to any person obtaining a copy
   7 # of this software and associated documentation files (the "Software"), to deal
   8 # in the Software without restriction, including without limitation the rights
   9 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 # copies of the Software, and to permit persons to whom the Software is
  11 # furnished to do so, subject to the following conditions:
  12 #
  13 # The above copyright notice and this permission notice shall be included in
  14 # all copies or substantial portions of the Software.
  15 #
  16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 # THE SOFTWARE.
  23 #
  24 ##########################################################################/
  25
  26
  27 '''Generate code to dump most GL state into JSON.'''
  28
  29
  30 from stdapi import *
  31
  32 from gltypes import *
  33 from glparams import *
  34
  35
  36 texture_targets = [
  37     ('GL_TEXTURE_1D', 'GL_TEXTURE_BINDING_1D'),
  38     ('GL_TEXTURE_2D', 'GL_TEXTURE_BINDING_2D'),
  39     ('GL_TEXTURE_3D', 'GL_TEXTURE_BINDING_3D'),
  40     ('GL_TEXTURE_RECTANGLE', 'GL_TEXTURE_BINDING_RECTANGLE'),
  41     ('GL_TEXTURE_CUBE_MAP', 'GL_TEXTURE_BINDING_CUBE_MAP')
  42 ]
  43
  44
  45 class GetInflector:
  46     '''Objects that describes how to inflect.'''
  47
  48     reduced_types = {
  49         B: I,
  50         E: I,
  51         I: F,
  52     }
  53
  54     def __init__(self, radical, inflections, suffix = ''):
  55         self.radical = radical
  56         self.inflections = inflections
  57         self.suffix = suffix
  58
  59     def reduced_type(self, type):
  60         if type in self.inflections:
  61             return type
  62         if type in self.reduced_types:
  63             return self.reduced_type(self.reduced_types[type])
  64         raise NotImplementedError
  65
  66     def inflect(self, type):
  67         return self.radical + self.inflection(type) + self.suffix
  68
  69     def inflection(self, type):
  70         type = self.reduced_type(type)
  71         assert type in self.inflections
  72         return self.inflections[type]
  73
  74     def __str__(self):
  75         return self.radical + self.suffix
  76
  77
  78 class StateGetter(Visitor):
  79     '''Type visitor that is able to extract the state via one of the glGet*
  80     functions.
  81
  82     It will declare any temporary variable
  83     '''
  84
  85     def __init__(self, radical, inflections, suffix=''):
  86         self.inflector = GetInflector(radical, inflections)
  87         self.suffix = suffix
  88
  89     def __call__(self, *args):
  90         pname = args[-1]
  91
  92         for function, type, count, name in parameters:
  93             if type is X:
  94                 continue
  95             if name == pname:
  96                 if count != 1:
  97                     type = Array(type, str(count))
  98
  99                 return type, self.visit(type, args)
 100
 101         raise NotImplementedError
 102
 103     def temp_name(self, args):
 104         '''Return the name of a temporary variable to hold the state.'''
 105         pname = args[-1]
 106
 107         return pname[3:].lower()
 108
 109     def visit_const(self, const, args):
 110         return self.visit(const.type, args)
 111
 112     def visit_scalar(self, type, args):
 113         temp_name = self.temp_name(args)
 114         elem_type = self.inflector.reduced_type(type)
 115         inflection = self.inflector.inflect(type)
 116         if inflection.endswith('v'):
 117             print '    %s %s = 0;' % (elem_type, temp_name)
 118             print '    %s(%s, &%s);' % (inflection + self.suffix, ', '.join(args), temp_name)
 119         else:
 120             print '    %s %s = %s(%s);' % (elem_type, temp_name, inflection + self.suffix, ', '.join(args))
 121         return temp_name
 122
 123     def visit_string(self, string, args):
 124         temp_name = self.temp_name(args)
 125         inflection = self.inflector.inflect(string)
 126         assert not inflection.endswith('v')
 127         print '    %s %s = (%s)%s(%s);' % (string, temp_name, string, inflection + self.suffix, ', '.join(args))
 128         return temp_name
 129
 130     def visit_alias(self, alias, args):
 131         return self.visit_scalar(alias, args)
 132
 133     def visit_enum(self, enum, args):
 134         return self.visit(GLint, args)
 135
 136     def visit_bitmask(self, bitmask, args):
 137         return self.visit(GLint, args)
 138
 139     def visit_array(self, array, args):
 140         temp_name = self.temp_name(args)
 141         if array.length == '1':
 142             return self.visit(array.type)
 143         elem_type = self.inflector.reduced_type(array.type)
 144         inflection = self.inflector.inflect(array.type)
 145         assert inflection.endswith('v')
 146         print '    %s %s[%s];' % (elem_type, temp_name, array.length)
 147         print '    memset(%s, 0, %s * sizeof *%s);' % (temp_name, array.length, temp_name)
 148         print '    %s(%s, %s);' % (inflection + self.suffix, ', '.join(args), temp_name)
 149         return temp_name
 150
 151     def visit_opaque(self, pointer, args):
 152         temp_name = self.temp_name(args)
 153         inflection = self.inflector.inflect(pointer)
 154         assert inflection.endswith('v')
 155         print '    GLvoid *%s;' % temp_name
 156         print '    %s(%s, &%s);' % (inflection + self.suffix, ', '.join(args), temp_name)
 157         return temp_name
 158
 159
 160 glGet = StateGetter('glGet', {
 161     B: 'Booleanv',
 162     I: 'Integerv',
 163     F: 'Floatv',
 164     D: 'Doublev',
 165     S: 'String',
 166     P: 'Pointerv',
 167 })
 168
 169 glGetMaterial = StateGetter('glGetMaterial', {I: 'iv', F: 'fv'})
 170 glGetLight = StateGetter('glGetLight', {I: 'iv', F: 'fv'})
 171 glGetVertexAttrib = StateGetter('glGetVertexAttrib', {I: 'iv', F: 'fv', D: 'dv', P: 'Pointerv'})
 172 glGetTexParameter = StateGetter('glGetTexParameter', {I: 'iv', F: 'fv'})
 173 glGetTexEnv = StateGetter('glGetTexEnv', {I: 'iv', F: 'fv'})
 174 glGetTexLevelParameter = StateGetter('glGetTexLevelParameter', {I: 'iv', F: 'fv'})
 175 glGetShader = StateGetter('glGetShaderiv', {I: 'iv'})
 176 glGetProgram = StateGetter('glGetProgram', {I: 'iv'})
 177 glGetProgramARB = StateGetter('glGetProgram', {I: 'iv', F: 'fv', S: 'Stringv'}, 'ARB')
 178
 179
 180 class JsonWriter(Visitor):
 181     '''Type visitor that will dump a value of the specified type through the
 182     JSON writer.
 183
 184     It expects a previously declared JSONWriter instance named "json".'''
 185
 186     def visit_literal(self, literal, instance):
 187         if literal.format == 'Bool':
 188             print '    json.writeBool(%s);' % instance
 189         elif literal.format in ('SInt', 'Uint', 'Float', 'Double'):
 190             print '    json.writeNumber(%s);' % instance
 191         else:
 192             raise NotImplementedError
 193
 194     def visit_string(self, string, instance):
 195         assert string.length is None
 196         print '    json.writeString((const char *)%s);' % instance
 197
 198     def visit_enum(self, enum, instance):
 199         if enum.expr == 'GLenum':
 200             print '    writeEnum(json, %s);' % instance
 201         else:
 202             print '    json.writeNumber(%s);' % instance
 203
 204     def visit_bitmask(self, bitmask, instance):
 205         raise NotImplementedError
 206
 207     def visit_alias(self, alias, instance):
 208         self.visit(alias.type, instance)
 209
 210     def visit_opaque(self, opaque, instance):
 211         print '    json.writeNumber((size_t)%s);' % instance
 212
 213     __index = 0
 214
 215     def visit_array(self, array, instance):
 216         index = '__i%u' % JsonWriter.__index
 217         JsonWriter.__index += 1
 218         print '    json.beginArray();'
 219         print '    for (unsigned %s = 0; %s < %s; ++%s) {' % (index, index, array.length, index)
 220         self.visit(array.type, '%s[%s]' % (instance, index))
 221         print '    }'
 222         print '    json.endArray();'
 223
 224
 225
 226 class StateDumper:
 227     '''Class to generate code to dump all GL state in JSON format via
 228     stdout.'''
 229
 230     def __init__(self):
 231         pass
 232
 233     def dump(self):
 234         print '#include <string.h>'
 235         print '#include <iostream>'
 236         print '#include <algorithm>'
 237         print
 238         print '#include "image.hpp"'
 239         print '#include "json.hpp"'
 240         print '#include "glimports.hpp"'
 241         print '#include "glproc.hpp"'
 242         print '#include "glsize.hpp"'
 243         print '#include "glretrace.hpp"'
 244         print
 245
 246         print 'static const char *'
 247         print '_enum_string(GLenum pname)'
 248         print '{'
 249         print '    switch(pname) {'
 250         for name in GLenum.values:
 251             print '    case %s:' % name
 252             print '        return "%s";' % name
 253         print '    default:'
 254         print '        return NULL;'
 255         print '    }'
 256         print '}'
 257         print
 258
 259         print 'static const char *'
 260         print 'enum_string(GLenum pname)'
 261         print '{'
 262         print '    const char *s = _enum_string(pname);'
 263         print '    if (s) {'
 264         print '        return s;'
 265         print '    } else {'
 266         print '        static char buf[16];'
 267         print '        snprintf(buf, sizeof buf, "0x%04x", pname);'
 268         print '        return buf;'
 269         print '    }'
 270         print '}'
 271         print
 272
 273         print 'static inline void'
 274         print 'writeEnum(JSONWriter &json, GLenum pname)'
 275         print '{'
 276         print '    const char *s = _enum_string(pname);'
 277         print '    if (s) {'
 278         print '        json.writeString(s);'
 279         print '    } else {'
 280         print '        json.writeNumber(pname);'
 281         print '    }'
 282         print '}'
 283         print
 284
 285         # shaders
 286         print '''
 287 static void
 288 writeShader(JSONWriter &json, GLuint shader)
 289 {
 290     if (!shader) {
 291         return;
 292     }
 293
 294     GLint shader_type = 0;
 295     glGetShaderiv(shader, GL_SHADER_TYPE, &shader_type);
 296     if (!shader_type) {
 297         return;
 298     }
 299
 300     GLint source_length = 0;
 301     glGetShaderiv(shader, GL_SHADER_SOURCE_LENGTH, &source_length);
 302     if (!source_length) {
 303         return;
 304     }
 305
 306     GLchar *source = new GLchar[source_length];
 307     GLsizei length = 0;
 308     source[0] = 0;
 309     glGetShaderSource(shader, source_length, &length, source);
 310
 311     json.beginMember(enum_string(shader_type));
 312     json.writeString(source);
 313     json.endMember();
 314
 315     delete [] source;
 316 }
 317
 318 static void
 319 writeShaderObj(JSONWriter &json, GLhandleARB shaderObj)
 320 {
 321     if (!shaderObj) {
 322         return;
 323     }
 324
 325     GLint shader_type = 0;
 326     glGetObjectParameterivARB(shaderObj, GL_OBJECT_TYPE_ARB, &shader_type);
 327     if (!shader_type) {
 328         return;
 329     }
 330
 331     GLint source_length = 0;
 332     glGetObjectParameterivARB(shaderObj, GL_OBJECT_SHADER_SOURCE_LENGTH_ARB, &source_length);
 333     if (!source_length) {
 334         return;
 335     }
 336
 337     GLcharARB *source = new GLcharARB[source_length];
 338     GLsizei length = 0;
 339     source[0] = 0;
 340     glGetShaderSource(shaderObj, source_length, &length, source);
 341
 342     json.beginMember(enum_string(shader_type));
 343     json.writeString(source);
 344     json.endMember();
 345
 346     delete [] source;
 347 }
 348
 349 static inline void
 350 writeCurrentProgram(JSONWriter &json)
 351 {
 352     GLint program = 0;
 353     glGetIntegerv(GL_CURRENT_PROGRAM, &program);
 354     if (!program) {
 355         return;
 356     }
 357
 358     GLint attached_shaders = 0;
 359     glGetProgramiv(program, GL_ATTACHED_SHADERS, &attached_shaders);
 360     if (!attached_shaders) {
 361         return;
 362     }
 363
 364     GLuint *shaders = new GLuint[attached_shaders];
 365     GLsizei count = 0;
 366     glGetAttachedShaders(program, attached_shaders, &count, shaders);
 367     for (GLsizei i = 0; i < count; ++ i) {
 368        writeShader(json, shaders[i]);
 369     }
 370     delete [] shaders;
 371 }
 372
 373 static inline void
 374 writeCurrentProgramObj(JSONWriter &json)
 375 {
 376     GLhandleARB programObj = glGetHandleARB(GL_PROGRAM_OBJECT_ARB);
 377     if (!programObj) {
 378         return;
 379     }
 380
 381     GLint attached_shaders = 0;
 382     glGetProgramivARB(programObj, GL_OBJECT_ATTACHED_OBJECTS_ARB, &attached_shaders);
 383     if (!attached_shaders) {
 384         return;
 385     }
 386
 387     GLhandleARB *shaderObjs = new GLhandleARB[attached_shaders];
 388     GLsizei count = 0;
 389     glGetAttachedObjectsARB(programObj, attached_shaders, &count, shaderObjs);
 390     for (GLsizei i = 0; i < count; ++ i) {
 391        writeShaderObj(json, shaderObjs[i]);
 392     }
 393     delete [] shaderObjs;
 394 }
 395
 396 static inline void
 397 writeArbProgram(JSONWriter &json, GLenum target)
 398 {
 399     if (!glIsEnabled(target)) {
 400         return;
 401     }
 402
 403     GLint program_length = 0;
 404     glGetProgramivARB(target, GL_PROGRAM_LENGTH_ARB, &program_length);
 405     if (!program_length) {
 406         return;
 407     }
 408
 409     GLchar *source = new GLchar[program_length + 1];
 410     source[0] = 0;
 411     glGetProgramStringARB(target, GL_PROGRAM_STRING_ARB, source);
 412     source[program_length] = 0;
 413
 414     json.beginMember(enum_string(target));
 415     json.writeString(source);
 416     json.endMember();
 417
 418     delete [] source;
 419 }
 420 '''
 421
 422         # texture image
 423         print '''
 424 static inline void
 425 writeTextureImage(JSONWriter &json, GLenum target, GLint level)
 426 {
 427     GLint width, height = 1, depth = 1;
 428
 429     width = 0;
 430     glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
 431
 432     if (target != GL_TEXTURE_1D) {
 433         height = 0;
 434         glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
 435         if (target == GL_TEXTURE_3D) {
 436             depth = 0;
 437             glGetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &depth);
 438         }
 439     }
 440
 441     if (width <= 0 || height <= 0 || depth <= 0) {
 442         return;
 443     } else {
 444         char label[512];
 445
 446         GLint active_texture = GL_TEXTURE0;
 447         glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
 448         snprintf(label, sizeof label, "%s, %s, level = %i", _enum_string(active_texture), _enum_string(target), level);
 449
 450         json.beginMember(label);
 451
 452         json.beginObject();
 453
 454         // Tell the GUI this is no ordinary object, but an image
 455         json.writeStringMember("__class__", "image");
 456
 457         json.writeNumberMember("__width__", width);
 458         json.writeNumberMember("__height__", height);
 459         json.writeNumberMember("__depth__", depth);
 460
 461         // Hardcoded for now, but we could chose types more adequate to the
 462         // texture internal format
 463         json.writeStringMember("__type__", "uint8");
 464         json.writeBoolMember("__normalized__", true);
 465         json.writeNumberMember("__channels__", 4);
 466
 467         GLubyte *pixels = new GLubyte[depth*width*height*4];
 468
 469         glGetTexImage(target, level, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 470
 471         json.beginMember("__data__");
 472         char *pngBuffer;
 473         int pngBufferSize;
 474         Image::writePixelsToBuffer(pixels, width, height, 4, false, &pngBuffer, &pngBufferSize);
 475         json.writeBase64(pngBuffer, pngBufferSize);
 476         free(pngBuffer);
 477         json.endMember(); // __data__
 478
 479         delete [] pixels;
 480         json.endObject();
 481     }
 482 }
 483
 484 static inline void
 485 writeDrawBufferImage(JSONWriter &json, GLenum format)
 486 {
 487     GLint channels = __gl_format_channels(format);
 488
 489     if (!glretrace::drawable) {
 490         json.writeNull();
 491     } else {
 492         GLint width  = glretrace::drawable->width;
 493         GLint height = glretrace::drawable->height;
 494
 495         json.beginObject();
 496
 497         // Tell the GUI this is no ordinary object, but an image
 498         json.writeStringMember("__class__", "image");
 499
 500         json.writeNumberMember("__width__", width);
 501         json.writeNumberMember("__height__", height);
 502         json.writeNumberMember("__depth__", 1);
 503
 504         // Hardcoded for now, but we could chose types more adequate to the
 505         // texture internal format
 506         json.writeStringMember("__type__", "uint8");
 507         json.writeBoolMember("__normalized__", true);
 508         json.writeNumberMember("__channels__", channels);
 509
 510         GLubyte *pixels = new GLubyte[width*height*channels];
 511
 512         GLint drawbuffer = glretrace::double_buffer ? GL_BACK : GL_FRONT;
 513         GLint readbuffer = glretrace::double_buffer ? GL_BACK : GL_FRONT;
 514         glGetIntegerv(GL_DRAW_BUFFER, &drawbuffer);
 515         glGetIntegerv(GL_READ_BUFFER, &readbuffer);
 516         glReadBuffer(drawbuffer);
 517
 518         glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 519         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 520
 521         glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, pixels);
 522
 523         glPopClientAttrib();
 524         glReadBuffer(readbuffer);
 525
 526         json.beginMember("__data__");
 527         char *pngBuffer;
 528         int pngBufferSize;
 529         Image::writePixelsToBuffer(pixels, width, height, channels, false, &pngBuffer, &pngBufferSize);
 530         //std::cerr <<" Before = "<<(width * height * channels * sizeof *pixels)
 531         //          <<", after = "<<pngBufferSize << ", ratio = " << double(width * height * channels * sizeof *pixels)/pngBufferSize;
 532         json.writeBase64(pngBuffer, pngBufferSize);
 533         free(pngBuffer);
 534         json.endMember(); // __data__
 535
 536         delete [] pixels;
 537         json.endObject();
 538     }
 539 }
 540
 541 static inline GLuint
 542 downsampledFramebuffer(GLuint oldFbo, GLint drawbuffer,
 543                        GLint colorRb, GLint depthRb, GLint stencilRb,
 544                        GLuint *rbs, GLint *numRbs)
 545 {
 546     GLuint fbo;
 547     GLint format;
 548     GLint w, h;
 549
 550     *numRbs = 0;
 551
 552     glGenFramebuffers(1, &fbo);
 553     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 554
 555     glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
 556     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 557                                  GL_RENDERBUFFER_WIDTH, &w);
 558     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 559                                  GL_RENDERBUFFER_HEIGHT, &h);
 560     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 561                                  GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 562
 563     glGenRenderbuffers(1, &rbs[*numRbs]);
 564     glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 565     glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 566     glFramebufferRenderbuffer(GL_FRAMEBUFFER, drawbuffer,
 567                               GL_RENDERBUFFER, rbs[*numRbs]);
 568
 569     glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 570     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 571     glDrawBuffer(drawbuffer);
 572     glReadBuffer(drawbuffer);
 573     glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 574                       GL_COLOR_BUFFER_BIT, GL_NEAREST);
 575     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 576     ++*numRbs;
 577
 578     if (stencilRb == depthRb && stencilRb) {
 579         //combined depth and stencil buffer
 580         glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
 581         glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 582                                      GL_RENDERBUFFER_WIDTH, &w);
 583         glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 584                                      GL_RENDERBUFFER_HEIGHT, &h);
 585         glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 586                                      GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 587
 588         glGenRenderbuffers(1, &rbs[*numRbs]);
 589         glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 590         glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 591         glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
 592                                   GL_RENDERBUFFER, rbs[*numRbs]);
 593         glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 594         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 595         glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 596                           GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
 597         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 598         ++*numRbs;
 599     } else {
 600         if (depthRb) {
 601             glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
 602             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 603                                          GL_RENDERBUFFER_WIDTH, &w);
 604             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 605                                          GL_RENDERBUFFER_HEIGHT, &h);
 606             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 607                                          GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 608
 609             glGenRenderbuffers(1, &rbs[*numRbs]);
 610             glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 611             glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 612             glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 613                                       GL_DEPTH_ATTACHMENT,
 614                                       GL_RENDERBUFFER, rbs[*numRbs]);
 615             glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 616             glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 617             glDrawBuffer(GL_DEPTH_ATTACHMENT);
 618             glReadBuffer(GL_DEPTH_ATTACHMENT);
 619             glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 620                               GL_DEPTH_BUFFER_BIT, GL_NEAREST);
 621             ++*numRbs;
 622         }
 623         if (stencilRb) {
 624             glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
 625             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 626                                          GL_RENDERBUFFER_WIDTH, &w);
 627             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 628                                          GL_RENDERBUFFER_HEIGHT, &h);
 629             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 630                                      GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 631
 632             glGenRenderbuffers(1, &rbs[*numRbs]);
 633             glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 634             glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 635             glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 636                                       GL_STENCIL_ATTACHMENT,
 637                                       GL_RENDERBUFFER, rbs[*numRbs]);
 638             glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 639             glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 640             glDrawBuffer(GL_STENCIL_ATTACHMENT);
 641             glReadBuffer(GL_STENCIL_ATTACHMENT);
 642             glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 643                               GL_STENCIL_BUFFER_BIT, GL_NEAREST);
 644             ++*numRbs;
 645         }
 646     }
 647
 648     return fbo;
 649 }
 650
 651 static void
 652 writeDrawBuffers(JSONWriter &json, GLboolean writeDepth, GLboolean writeStencil)
 653 {
 654     json.beginMember("GL_RGBA");
 655     writeDrawBufferImage(json, GL_RGBA);
 656     json.endMember();
 657
 658     if (writeDepth) {
 659         json.beginMember("GL_DEPTH_COMPONENT");
 660         writeDrawBufferImage(json, GL_DEPTH_COMPONENT);
 661         json.endMember();
 662     }
 663
 664     if (writeStencil) {
 665         json.beginMember("GL_STENCIL_INDEX");
 666         writeDrawBufferImage(json, GL_STENCIL_INDEX);
 667         json.endMember();
 668     }
 669 }
 670
 671 '''
 672
 673         # textures
 674         print 'static inline void'
 675         print 'writeTexture(JSONWriter &json, GLenum target, GLenum binding)'
 676         print '{'
 677         print '    GLint texture_binding = 0;'
 678         print '    glGetIntegerv(binding, &texture_binding);'
 679         print '    if (!glIsEnabled(target) && !texture_binding) {'
 680         print '        return;'
 681         print '    }'
 682         print
 683         print '    GLint level = 0;'
 684         print '    do {'
 685         print '        GLint width = 0, height = 0;'
 686         print '        glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);'
 687         print '        glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);'
 688         print '        if (!width || !height) {'
 689         print '            break;'
 690         print '        }'
 691         print
 692         print '        if (target == GL_TEXTURE_CUBE_MAP) {'
 693         print '            for (int face = 0; face < 6; ++face) {'
 694         print '                writeTextureImage(json, GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, level);'
 695         print '            }'
 696         print '        } else {'
 697         print '            writeTextureImage(json, target, level);'
 698         print '        }'
 699         print
 700         print '        ++level;'
 701         print '    } while(true);'
 702         print '}'
 703         print
 704
 705         print 'void glretrace::state_dump(std::ostream &os)'
 706         print '{'
 707         print '    JSONWriter json(os);'
 708         self.dump_parameters()
 709         self.dump_current_program()
 710         self.dump_textures()
 711         self.dump_framebuffer()
 712         print '}'
 713         print
 714
 715     def dump_parameters(self):
 716         print '    json.beginMember("parameters");'
 717         print '    json.beginObject();'
 718
 719         self.dump_atoms(glGet)
 720
 721         self.dump_material_params()
 722         self.dump_light_params()
 723         self.dump_vertex_attribs()
 724         self.dump_texenv_params()
 725         self.dump_program_params()
 726         self.dump_texture_parameters()
 727
 728         print '    json.endObject();'
 729         print '    json.endMember(); // parameters'
 730         print
 731
 732     def dump_material_params(self):
 733         for face in ['GL_FRONT', 'GL_BACK']:
 734             print '    json.beginMember("%s");' % face
 735             print '    json.beginObject();'
 736             self.dump_atoms(glGetMaterial, face)
 737             print '    json.endObject();'
 738         print
 739
 740     def dump_light_params(self):
 741         print '    GLint max_lights = 0;'
 742         print '    __glGetIntegerv(GL_MAX_LIGHTS, &max_lights);'
 743         print '    for (GLint index = 0; index < max_lights; ++index) {'
 744         print '        GLenum light = GL_LIGHT0 + index;'
 745         print '        if (glIsEnabled(light)) {'
 746         print '            char name[32];'
 747         print '            snprintf(name, sizeof name, "GL_LIGHT%i", index);'
 748         print '            json.beginMember(name);'
 749         print '            json.beginObject();'
 750         self.dump_atoms(glGetLight, '    GL_LIGHT0 + index')
 751         print '            json.endObject();'
 752         print '            json.endMember(); // GL_LIGHTi'
 753         print '        }'
 754         print '    }'
 755         print
 756
 757     def dump_texenv_params(self):
 758         for target in ['GL_TEXTURE_ENV', 'GL_TEXTURE_FILTER_CONTROL', 'GL_POINT_SPRITE']:
 759             if target != 'GL_TEXTURE_FILTER_CONTROL':
 760                 print '    if (glIsEnabled(%s)) {' % target
 761             else:
 762                 print '    {'
 763             print '        json.beginMember("%s");' % target
 764             print '        json.beginObject();'
 765             self.dump_atoms(glGetTexEnv, target)
 766             print '        json.endObject();'
 767             print '    }'
 768
 769     def dump_vertex_attribs(self):
 770         print '    GLint max_vertex_attribs = 0;'
 771         print '    __glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &max_vertex_attribs);'
 772         print '    for (GLint index = 0; index < max_vertex_attribs; ++index) {'
 773         print '        char name[32];'
 774         print '        snprintf(name, sizeof name, "GL_VERTEX_ATTRIB_ARRAY%i", index);'
 775         print '        json.beginMember(name);'
 776         print '        json.beginObject();'
 777         self.dump_atoms(glGetVertexAttrib, 'index')
 778         print '        json.endObject();'
 779         print '        json.endMember(); // GL_VERTEX_ATTRIB_ARRAYi'
 780         print '    }'
 781         print
 782
 783     program_targets = [
 784         'GL_FRAGMENT_PROGRAM_ARB',
 785         'GL_VERTEX_PROGRAM_ARB',
 786     ]
 787
 788     def dump_program_params(self):
 789         for target in self.program_targets:
 790             print '    if (glIsEnabled(%s)) {' % target
 791             print '        json.beginMember("%s");' % target
 792             print '        json.beginObject();'
 793             self.dump_atoms(glGetProgramARB, target)
 794             print '        json.endObject();'
 795             print '    }'
 796
 797     def dump_texture_parameters(self):
 798         print '    {'
 799         print '        GLint active_texture = GL_TEXTURE0;'
 800         print '        glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);'
 801         print '        GLint max_texture_coords = 0;'
 802         print '        glGetIntegerv(GL_MAX_TEXTURE_COORDS, &max_texture_coords);'
 803         print '        GLint max_combined_texture_image_units = 0;'
 804         print '        glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_texture_image_units);'
 805         print '        GLint max_units = std::max(max_combined_texture_image_units, max_texture_coords);'
 806         print '        for (GLint unit = 0; unit < max_units; ++unit) {'
 807         print '            char name[32];'
 808         print '            snprintf(name, sizeof name, "GL_TEXTURE%i", unit);'
 809         print '            json.beginMember(name);'
 810         print '            glActiveTexture(GL_TEXTURE0 + unit);'
 811         print '            json.beginObject();'
 812         print '            GLint texture;'
 813         print
 814         for target, binding in texture_targets:
 815             print '            // %s' % target
 816             print '            texture = 0;'
 817             print '            glGetIntegerv(%s, &texture);' % binding
 818             print '            if (glIsEnabled(%s) || texture) {' % target
 819             print '                json.beginMember("%s");' % target
 820             print '                json.beginObject();'
 821             self.dump_atoms(glGetTexParameter, target)
 822             # We only dump the first level parameters
 823             self.dump_atoms(glGetTexLevelParameter, target, "0")
 824             print '                json.endObject();'
 825             print '                json.endMember(); // %s' % target
 826             print '            }'
 827             print
 828         print '            json.endObject();'
 829         print '            json.endMember(); // GL_TEXTUREi'
 830         print '        }'
 831         print '        glActiveTexture(active_texture);'
 832         print '    }'
 833         print
 834
 835     def dump_current_program(self):
 836         print '    json.beginMember("shaders");'
 837         print '    json.beginObject();'
 838         print '    writeCurrentProgram(json);'
 839         for target in self.program_targets:
 840             print '    writeArbProgram(json, %s);' % target
 841         print '    json.endObject();'
 842         print '    json.endMember(); //shaders'
 843         print
 844
 845     def dump_textures(self):
 846         print '    {'
 847         print '        json.beginMember("textures");'
 848         print '        json.beginObject();'
 849         print '        GLint active_texture = GL_TEXTURE0;'
 850         print '        glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);'
 851         print '        GLint max_texture_coords = 0;'
 852         print '        glGetIntegerv(GL_MAX_TEXTURE_COORDS, &max_texture_coords);'
 853         print '        GLint max_combined_texture_image_units = 0;'
 854         print '        glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_texture_image_units);'
 855         print '        GLint max_units = std::max(max_combined_texture_image_units, max_texture_coords);'
 856         print '        for (GLint unit = 0; unit < max_units; ++unit) {'
 857         print '            GLenum texture = GL_TEXTURE0 + unit;'
 858         print '            glActiveTexture(texture);'
 859         for target, binding in texture_targets:
 860             print '            writeTexture(json, %s, %s);' % (target, binding)
 861         print '        }'
 862         print '        glActiveTexture(active_texture);'
 863         print '        json.endObject();'
 864         print '        json.endMember(); // textures'
 865         print '    }'
 866         print
 867
 868     def dump_framebuffer(self):
 869         print '    json.beginMember("framebuffer");'
 870         print '    json.beginObject();'
 871         # TODO: Handle real FBOs
 872         print
 873         print '    GLint boundDrawFbo = 0, boundReadFbo = 0;'
 874         print '    glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &boundDrawFbo);'
 875         print '    glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &boundReadFbo);'
 876         print '    if (!boundDrawFbo) {'
 877         print '        GLint depth_bits = 0;'
 878         print '        glGetIntegerv(GL_DEPTH_BITS, &depth_bits);'
 879         print '        GLint stencil_bits = 0;'
 880         print '        glGetIntegerv(GL_STENCIL_BITS, &stencil_bits);'
 881         print '        writeDrawBuffers(json, depth_bits, stencil_bits);'
 882         print '    } else {'
 883         print '        GLint colorRb, stencilRb, depthRb;'
 884         print '        GLint boundRb;'
 885         print '        glGetIntegerv(GL_RENDERBUFFER_BINDING, &boundRb);'
 886         print '        GLint drawbuffer = glretrace::double_buffer ? GL_BACK : GL_FRONT;'
 887         print '        glGetIntegerv(GL_DRAW_BUFFER, &drawbuffer);'
 888         print
 889         print '        glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,'
 890         print '                                              drawbuffer,'
 891         print '                                              GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,'
 892         print '                                              &colorRb);'
 893         print '        glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,'
 894         print '                                              GL_DEPTH_ATTACHMENT,'
 895         print '                                              GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,'
 896         print '                                              &depthRb);'
 897         print '        glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,'
 898         print '                                              GL_STENCIL_ATTACHMENT,'
 899         print '                                              GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,'
 900         print '                                              &stencilRb);'
 901         print
 902         print '        GLint colorSamples, depthSamples, stencilSamples;'
 903         print '        GLuint rbs[3];'
 904         print '        GLint numRbs = 0;'
 905         print '        GLuint fboCopy = 0;'
 906         print '        glBindRenderbuffer(GL_RENDERBUFFER, colorRb);'
 907         print '        glGetRenderbufferParameteriv(GL_RENDERBUFFER,'
 908         print '                                     GL_RENDERBUFFER_SAMPLES, &colorSamples);'
 909         print '        glBindRenderbuffer(GL_RENDERBUFFER, depthRb);'
 910         print '        glGetRenderbufferParameteriv(GL_RENDERBUFFER,'
 911         print '                                     GL_RENDERBUFFER_SAMPLES, &depthSamples);'
 912         print '        glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);'
 913         print '        glGetRenderbufferParameteriv(GL_RENDERBUFFER,'
 914         print '                                     GL_RENDERBUFFER_SAMPLES, &stencilSamples);'
 915         print '        glBindRenderbuffer(GL_RENDERBUFFER, boundRb);'
 916         print
 917         print '        if (colorSamples || depthSamples || stencilSamples) {'
 918         print '            //glReadPixels doesnt support multisampled buffers so we need'
 919         print '            // to blit the fbo to a temporary one'
 920         print '            fboCopy = downsampledFramebuffer(boundDrawFbo, drawbuffer,'
 921         print '                                             colorRb, depthRb, stencilRb,'
 922         print '                                             rbs, &numRbs);'
 923         print '        }'
 924         print '        glDrawBuffer(drawbuffer);'
 925         print '        glReadBuffer(drawbuffer);'
 926         print
 927         print '        writeDrawBuffers(json, depthRb, stencilRb);'
 928         print
 929         print '        if (fboCopy) {'
 930         print '            glBindFramebuffer(GL_FRAMEBUFFER, boundDrawFbo);'
 931         print '            glBindFramebuffer(GL_READ_FRAMEBUFFER, boundReadFbo);'
 932         print '            glBindFramebuffer(GL_DRAW_FRAMEBUFFER, boundDrawFbo);'
 933         print '            glBindRenderbuffer(GL_RENDERBUFFER_BINDING, boundRb);'
 934         print '            glDeleteRenderbuffers(numRbs, rbs);'
 935         print '            glDeleteFramebuffers(1, &fboCopy);'
 936         print '        }'
 937         print '    }'
 938         print
 939         print '    json.endObject();'
 940         print '    json.endMember(); // framebuffer'
 941         pass
 942
 943     def dump_atoms(self, getter, *args):
 944         for function, type, count, name in parameters:
 945             inflection = getter.inflector.radical + getter.suffix
 946             if inflection not in function.split(','):
 947                 continue
 948             if type is X:
 949                 continue
 950             print '        // %s' % name
 951             print '        {'
 952             type, value = getter(*(args + (name,)))
 953             print '            if (glGetError() != GL_NO_ERROR) {'
 954             #print '                std::cerr << "warning: %s(%s) failed\\n";' % (inflection, name)
 955             print '            } else {'
 956             print '                json.beginMember("%s");' % name
 957             JsonWriter().visit(type, value)
 958             print '                json.endMember();'
 959             print '            }'
 960             print '        }'
 961             print
 962
 963
 964 if __name__ == '__main__':
 965     StateDumper().dump()