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 glGetProgramARB = StateGetter('glGetProgram', {I: 'iv', F: 'fv', S: 'Stringv'}, 'ARB')
 176
 177
 178 class JsonWriter(Visitor):
 179     '''Type visitor that will dump a value of the specified type through the
 180     JSON writer.
 181
 182     It expects a previously declared JSONWriter instance named "json".'''
 183
 184     def visit_literal(self, literal, instance):
 185         if literal.format == 'Bool':
 186             print '    json.writeBool(%s);' % instance
 187         elif literal.format in ('SInt', 'Uint', 'Float', 'Double'):
 188             print '    json.writeNumber(%s);' % instance
 189         else:
 190             raise NotImplementedError
 191
 192     def visit_string(self, string, instance):
 193         assert string.length is None
 194         print '    json.writeString((const char *)%s);' % instance
 195
 196     def visit_enum(self, enum, instance):
 197         if enum.expr == 'GLenum':
 198             print '    writeEnum(json, %s);' % instance
 199         else:
 200             print '    json.writeNumber(%s);' % instance
 201
 202     def visit_bitmask(self, bitmask, instance):
 203         raise NotImplementedError
 204
 205     def visit_alias(self, alias, instance):
 206         self.visit(alias.type, instance)
 207
 208     def visit_opaque(self, opaque, instance):
 209         print '    json.writeNumber((size_t)%s);' % instance
 210
 211     __index = 0
 212
 213     def visit_array(self, array, instance):
 214         index = '__i%u' % JsonWriter.__index
 215         JsonWriter.__index += 1
 216         print '    json.beginArray();'
 217         print '    for (unsigned %s = 0; %s < %s; ++%s) {' % (index, index, array.length, index)
 218         self.visit(array.type, '%s[%s]' % (instance, index))
 219         print '    }'
 220         print '    json.endArray();'
 221
 222
 223
 224 class StateDumper:
 225     '''Class to generate code to dump all GL state in JSON format via
 226     stdout.'''
 227
 228     def __init__(self):
 229         pass
 230
 231     def dump(self):
 232         print '#include <string.h>'
 233         print '#include <iostream>'
 234         print '#include <algorithm>'
 235         print
 236         print '#include "image.hpp"'
 237         print '#include "json.hpp"'
 238         print '#include "glimports.hpp"'
 239         print '#include "glproc.hpp"'
 240         print '#include "glsize.hpp"'
 241         print '#include "glretrace.hpp"'
 242         print
 243
 244         print 'static const char *'
 245         print '_enum_string(GLenum pname)'
 246         print '{'
 247         print '    switch(pname) {'
 248         for name in GLenum.values:
 249             print '    case %s:' % name
 250             print '        return "%s";' % name
 251         print '    default:'
 252         print '        return NULL;'
 253         print '    }'
 254         print '}'
 255         print
 256
 257         print 'static const char *'
 258         print 'enum_string(GLenum pname)'
 259         print '{'
 260         print '    const char *s = _enum_string(pname);'
 261         print '    if (s) {'
 262         print '        return s;'
 263         print '    } else {'
 264         print '        static char buf[16];'
 265         print '        snprintf(buf, sizeof buf, "0x%04x", pname);'
 266         print '        return buf;'
 267         print '    }'
 268         print '}'
 269         print
 270
 271         print 'static inline void'
 272         print 'writeEnum(JSONWriter &json, GLenum pname)'
 273         print '{'
 274         print '    const char *s = _enum_string(pname);'
 275         print '    if (s) {'
 276         print '        json.writeString(s);'
 277         print '    } else {'
 278         print '        json.writeNumber(pname);'
 279         print '    }'
 280         print '}'
 281         print
 282
 283         # shaders
 284         print '''
 285 static void
 286 writeShader(JSONWriter &json, GLuint shader)
 287 {
 288     if (!shader) {
 289         return;
 290     }
 291
 292     GLint shader_type = 0;
 293     glGetShaderiv(shader, GL_SHADER_TYPE, &shader_type);
 294     if (!shader_type) {
 295         return;
 296     }
 297
 298     GLint source_length = 0;
 299     glGetShaderiv(shader, GL_SHADER_SOURCE_LENGTH, &source_length);
 300     if (!source_length) {
 301         return;
 302     }
 303
 304     GLchar *source = new GLchar[source_length];
 305     GLsizei length = 0;
 306     source[0] = 0;
 307     glGetShaderSource(shader, source_length, &length, source);
 308
 309     json.beginMember(enum_string(shader_type));
 310     json.writeString(source);
 311     json.endMember();
 312
 313     delete [] source;
 314 }
 315
 316 static inline void
 317 writeCurrentProgram(JSONWriter &json)
 318 {
 319     GLint program = 0;
 320     glGetIntegerv(GL_CURRENT_PROGRAM, &program);
 321     if (!program) {
 322         return;
 323     }
 324
 325     GLint attached_shaders = 0;
 326     glGetProgramiv(program, GL_ATTACHED_SHADERS, &attached_shaders);
 327     if (!attached_shaders) {
 328         return;
 329     }
 330
 331     GLuint *shaders = new GLuint[attached_shaders];
 332     GLsizei count = 0;
 333     glGetAttachedShaders(program, attached_shaders, &count, shaders);
 334     for (GLsizei i = 0; i < count; ++ i) {
 335        writeShader(json, shaders[i]);
 336     }
 337     delete [] shaders;
 338 }
 339
 340 static inline void
 341 writeArbProgram(JSONWriter &json, GLenum target)
 342 {
 343     if (!glIsEnabled(target)) {
 344         return;
 345     }
 346
 347     GLint program_length = 0;
 348     glGetProgramivARB(target, GL_PROGRAM_LENGTH_ARB, &program_length);
 349     if (!program_length) {
 350         return;
 351     }
 352
 353     GLchar *source = new GLchar[program_length + 1];
 354     source[0] = 0;
 355     glGetProgramStringARB(target, GL_PROGRAM_STRING_ARB, source);
 356     source[program_length] = 0;
 357
 358     json.beginMember(enum_string(target));
 359     json.writeString(source);
 360     json.endMember();
 361
 362     delete [] source;
 363 }
 364 '''
 365
 366         # texture image
 367         print '''
 368 static inline void
 369 writeTextureImage(JSONWriter &json, GLenum target, GLint level)
 370 {
 371     GLint width, height = 1, depth = 1;
 372
 373     width = 0;
 374     glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
 375
 376     if (target != GL_TEXTURE_1D) {
 377         height = 0;
 378         glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
 379         if (target == GL_TEXTURE_3D) {
 380             depth = 0;
 381             glGetTexLevelParameteriv(target, level, GL_TEXTURE_DEPTH, &depth);
 382         }
 383     }
 384
 385     if (width <= 0 || height <= 0 || depth <= 0) {
 386         return;
 387     } else {
 388         char label[512];
 389
 390         GLint active_texture = GL_TEXTURE0;
 391         glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
 392         snprintf(label, sizeof label, "%s, %s, level = %i", _enum_string(active_texture), _enum_string(target), level);
 393
 394         json.beginMember(label);
 395
 396         json.beginObject();
 397
 398         // Tell the GUI this is no ordinary object, but an image
 399         json.writeStringMember("__class__", "image");
 400
 401         json.writeNumberMember("__width__", width);
 402         json.writeNumberMember("__height__", height);
 403         json.writeNumberMember("__depth__", depth);
 404
 405         // Hardcoded for now, but we could chose types more adequate to the
 406         // texture internal format
 407         json.writeStringMember("__type__", "uint8");
 408         json.writeBoolMember("__normalized__", true);
 409         json.writeNumberMember("__channels__", 4);
 410
 411         GLubyte *pixels = new GLubyte[depth*width*height*4];
 412
 413         if (target == GL_TEXTURE_CUBE_MAP) {
 414             // TODO: dump other faces too
 415             target = GL_TEXTURE_CUBE_MAP_POSITIVE_X;
 416         }
 417
 418         glGetTexImage(target, level, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
 419
 420         json.beginMember("__data__");
 421         char *pngBuffer;
 422         int pngBufferSize;
 423         Image::writePixelsToBuffer(pixels, width, height, 4, false, &pngBuffer, &pngBufferSize);
 424         json.writeBase64(pngBuffer, pngBufferSize);
 425         free(pngBuffer);
 426         json.endMember(); // __data__
 427
 428         delete [] pixels;
 429         json.endObject();
 430     }
 431 }
 432
 433 static inline void
 434 writeDrawBufferImage(JSONWriter &json, GLenum format)
 435 {
 436     GLint width  = glretrace::window_width;
 437     GLint height = glretrace::window_height;
 438
 439     GLint channels = __gl_format_channels(format);
 440
 441     if (!width || !height) {
 442         json.writeNull();
 443     } else {
 444         json.beginObject();
 445
 446         // Tell the GUI this is no ordinary object, but an image
 447         json.writeStringMember("__class__", "image");
 448
 449         json.writeNumberMember("__width__", width);
 450         json.writeNumberMember("__height__", height);
 451         json.writeNumberMember("__depth__", 1);
 452
 453         // Hardcoded for now, but we could chose types more adequate to the
 454         // texture internal format
 455         json.writeStringMember("__type__", "uint8");
 456         json.writeBoolMember("__normalized__", true);
 457         json.writeNumberMember("__channels__", channels);
 458
 459         GLubyte *pixels = new GLubyte[width*height*channels];
 460
 461         GLint drawbuffer = glretrace::double_buffer ? GL_BACK : GL_FRONT;
 462         GLint readbuffer = glretrace::double_buffer ? GL_BACK : GL_FRONT;
 463         glGetIntegerv(GL_DRAW_BUFFER, &drawbuffer);
 464         glGetIntegerv(GL_READ_BUFFER, &readbuffer);
 465         glReadBuffer(drawbuffer);
 466
 467         glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
 468         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 469
 470         glReadPixels(0, 0, width, height, format, GL_UNSIGNED_BYTE, pixels);
 471
 472         glPopClientAttrib();
 473         glReadBuffer(readbuffer);
 474
 475         json.beginMember("__data__");
 476         char *pngBuffer;
 477         int pngBufferSize;
 478         Image::writePixelsToBuffer(pixels, width, height, channels, false, &pngBuffer, &pngBufferSize);
 479         //std::cerr <<" Before = "<<(width * height * channels * sizeof *pixels)
 480         //          <<", after = "<<pngBufferSize << ", ratio = " << double(width * height * channels * sizeof *pixels)/pngBufferSize;
 481         json.writeBase64(pngBuffer, pngBufferSize);
 482         free(pngBuffer);
 483         json.endMember(); // __data__
 484
 485         delete [] pixels;
 486         json.endObject();
 487     }
 488 }
 489
 490 static inline GLuint
 491 downsampledFramebuffer(GLuint oldFbo, GLint drawbuffer,
 492                        GLint colorRb, GLint depthRb, GLint stencilRb,
 493                        GLuint *rbs, GLint *numRbs)
 494 {
 495     GLuint fbo;
 496     GLint format;
 497     GLint w, h;
 498
 499     *numRbs = 0;
 500
 501     glGenFramebuffers(1, &fbo);
 502     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 503
 504     glBindRenderbuffer(GL_RENDERBUFFER, colorRb);
 505     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 506                                  GL_RENDERBUFFER_WIDTH, &w);
 507     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 508                                  GL_RENDERBUFFER_HEIGHT, &h);
 509     glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 510                                  GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 511
 512     glGenRenderbuffers(1, &rbs[*numRbs]);
 513     glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 514     glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 515     glFramebufferRenderbuffer(GL_FRAMEBUFFER, drawbuffer,
 516                               GL_RENDERBUFFER, rbs[*numRbs]);
 517
 518     glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 519     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 520     glDrawBuffer(drawbuffer);
 521     glReadBuffer(drawbuffer);
 522     glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 523                       GL_COLOR_BUFFER_BIT, GL_NEAREST);
 524     glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 525     ++*numRbs;
 526
 527     if (stencilRb == depthRb && stencilRb) {
 528         //combined depth and stencil buffer
 529         glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
 530         glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 531                                      GL_RENDERBUFFER_WIDTH, &w);
 532         glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 533                                      GL_RENDERBUFFER_HEIGHT, &h);
 534         glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 535                                      GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 536
 537         glGenRenderbuffers(1, &rbs[*numRbs]);
 538         glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 539         glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 540         glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT,
 541                                   GL_RENDERBUFFER, rbs[*numRbs]);
 542         glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 543         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 544         glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 545                           GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST);
 546         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 547         ++*numRbs;
 548     } else {
 549         if (depthRb) {
 550             glBindRenderbuffer(GL_RENDERBUFFER, depthRb);
 551             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 552                                          GL_RENDERBUFFER_WIDTH, &w);
 553             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 554                                          GL_RENDERBUFFER_HEIGHT, &h);
 555             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 556                                          GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 557
 558             glGenRenderbuffers(1, &rbs[*numRbs]);
 559             glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 560             glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 561             glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 562                                       GL_DEPTH_ATTACHMENT,
 563                                       GL_RENDERBUFFER, rbs[*numRbs]);
 564             glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 565             glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 566             glDrawBuffer(GL_DEPTH_ATTACHMENT);
 567             glReadBuffer(GL_DEPTH_ATTACHMENT);
 568             glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 569                               GL_DEPTH_BUFFER_BIT, GL_NEAREST);
 570             ++*numRbs;
 571         }
 572         if (stencilRb) {
 573             glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);
 574             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 575                                          GL_RENDERBUFFER_WIDTH, &w);
 576             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 577                                          GL_RENDERBUFFER_HEIGHT, &h);
 578             glGetRenderbufferParameteriv(GL_RENDERBUFFER,
 579                                      GL_RENDERBUFFER_INTERNAL_FORMAT, &format);
 580
 581             glGenRenderbuffers(1, &rbs[*numRbs]);
 582             glBindRenderbuffer(GL_RENDERBUFFER, rbs[*numRbs]);
 583             glRenderbufferStorage(GL_RENDERBUFFER, format, w, h);
 584             glFramebufferRenderbuffer(GL_FRAMEBUFFER,
 585                                       GL_STENCIL_ATTACHMENT,
 586                                       GL_RENDERBUFFER, rbs[*numRbs]);
 587             glBindFramebuffer(GL_READ_FRAMEBUFFER, oldFbo);
 588             glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
 589             glDrawBuffer(GL_STENCIL_ATTACHMENT);
 590             glReadBuffer(GL_STENCIL_ATTACHMENT);
 591             glBlitFramebuffer(0, 0, w, h, 0, 0, w, h,
 592                               GL_STENCIL_BUFFER_BIT, GL_NEAREST);
 593             ++*numRbs;
 594         }
 595     }
 596
 597     return fbo;
 598 }
 599
 600 static void
 601 writeDrawBuffers(JSONWriter &json, GLboolean writeDepth, GLboolean writeStencil)
 602 {
 603     json.beginMember("GL_RGBA");
 604     writeDrawBufferImage(json, GL_RGBA);
 605     json.endMember();
 606
 607     if (writeDepth) {
 608         json.beginMember("GL_DEPTH_COMPONENT");
 609         writeDrawBufferImage(json, GL_DEPTH_COMPONENT);
 610         json.endMember();
 611     }
 612
 613     if (writeStencil) {
 614         json.beginMember("GL_STENCIL_INDEX");
 615         writeDrawBufferImage(json, GL_STENCIL_INDEX);
 616         json.endMember();
 617     }
 618 }
 619
 620 '''
 621
 622         # textures
 623         print 'static inline void'
 624         print 'writeTexture(JSONWriter &json, GLenum target, GLenum binding)'
 625         print '{'
 626         print '    GLint texture_binding = 0;'
 627         print '    glGetIntegerv(binding, &texture_binding);'
 628         print '    if (!glIsEnabled(target) && !texture_binding) {'
 629         print '        return;'
 630         print '    }'
 631         print
 632         print '    GLint level = 0;'
 633         print '    do {'
 634         print '        GLint width = 0, height = 0;'
 635         print '        glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);'
 636         print '        glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);'
 637         print '        if (!width || !height) {'
 638         print '            break;'
 639         print '        }'
 640         print
 641         print '        writeTextureImage(json, target, level);'
 642         print
 643         print '        ++level;'
 644         print '    } while(true);'
 645         print '}'
 646         print
 647
 648         print 'void glretrace::state_dump(std::ostream &os)'
 649         print '{'
 650         print '    JSONWriter json(os);'
 651         self.dump_parameters()
 652         self.dump_current_program()
 653         self.dump_textures()
 654         self.dump_framebuffer()
 655         print '}'
 656         print
 657
 658     def dump_parameters(self):
 659         print '    json.beginMember("parameters");'
 660         print '    json.beginObject();'
 661
 662         self.dump_atoms(glGet)
 663
 664         self.dump_material_params()
 665         self.dump_light_params()
 666         self.dump_vertex_attribs()
 667         self.dump_texenv_params()
 668         self.dump_program_params()
 669         self.dump_texture_parameters()
 670
 671         print '    json.endObject();'
 672         print '    json.endMember(); // parameters'
 673         print
 674
 675     def dump_material_params(self):
 676         for face in ['GL_FRONT', 'GL_BACK']:
 677             print '    json.beginMember("%s");' % face
 678             print '    json.beginObject();'
 679             self.dump_atoms(glGetMaterial, face)
 680             print '    json.endObject();'
 681         print
 682
 683     def dump_light_params(self):
 684         print '    GLint max_lights = 0;'
 685         print '    __glGetIntegerv(GL_MAX_LIGHTS, &max_lights);'
 686         print '    for (GLint index = 0; index < max_lights; ++index) {'
 687         print '        GLenum light = GL_LIGHT0 + index;'
 688         print '        if (glIsEnabled(light)) {'
 689         print '            char name[32];'
 690         print '            snprintf(name, sizeof name, "GL_LIGHT%i", index);'
 691         print '            json.beginMember(name);'
 692         print '            json.beginObject();'
 693         self.dump_atoms(glGetLight, '    GL_LIGHT0 + index')
 694         print '            json.endObject();'
 695         print '            json.endMember(); // GL_LIGHTi'
 696         print '        }'
 697         print '    }'
 698         print
 699
 700     def dump_texenv_params(self):
 701         for target in ['GL_TEXTURE_ENV', 'GL_TEXTURE_FILTER_CONTROL', 'GL_POINT_SPRITE']:
 702             if target != 'GL_TEXTURE_FILTER_CONTROL':
 703                 print '    if (glIsEnabled(%s)) {' % target
 704             else:
 705                 print '    {'
 706             print '        json.beginMember("%s");' % target
 707             print '        json.beginObject();'
 708             self.dump_atoms(glGetTexEnv, target)
 709             print '        json.endObject();'
 710             print '    }'
 711
 712     def dump_vertex_attribs(self):
 713         print '    GLint max_vertex_attribs = 0;'
 714         print '    __glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &max_vertex_attribs);'
 715         print '    for (GLint index = 0; index < max_vertex_attribs; ++index) {'
 716         print '        char name[32];'
 717         print '        snprintf(name, sizeof name, "GL_VERTEX_ATTRIB_ARRAY%i", index);'
 718         print '        json.beginMember(name);'
 719         print '        json.beginObject();'
 720         self.dump_atoms(glGetVertexAttrib, 'index')
 721         print '        json.endObject();'
 722         print '        json.endMember(); // GL_VERTEX_ATTRIB_ARRAYi'
 723         print '    }'
 724         print
 725
 726     program_targets = [
 727         'GL_FRAGMENT_PROGRAM_ARB',
 728         'GL_VERTEX_PROGRAM_ARB',
 729     ]
 730
 731     def dump_program_params(self):
 732         for target in self.program_targets:
 733             print '    if (glIsEnabled(%s)) {' % target
 734             print '        json.beginMember("%s");' % target
 735             print '        json.beginObject();'
 736             self.dump_atoms(glGetProgramARB, target)
 737             print '        json.endObject();'
 738             print '    }'
 739
 740     def dump_texture_parameters(self):
 741         print '    {'
 742         print '        GLint active_texture = GL_TEXTURE0;'
 743         print '        glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);'
 744         print '        GLint max_texture_coords = 0;'
 745         print '        glGetIntegerv(GL_MAX_TEXTURE_COORDS, &max_texture_coords);'
 746         print '        GLint max_combined_texture_image_units = 0;'
 747         print '        glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_texture_image_units);'
 748         print '        GLint max_units = std::max(max_combined_texture_image_units, max_texture_coords);'
 749         print '        for (GLint unit = 0; unit < max_units; ++unit) {'
 750         print '            char name[32];'
 751         print '            snprintf(name, sizeof name, "GL_TEXTURE%i", unit);'
 752         print '            json.beginMember(name);'
 753         print '            glActiveTexture(GL_TEXTURE0 + unit);'
 754         print '            json.beginObject();'
 755         print '            GLint texture;'
 756         print
 757         for target, binding in texture_targets:
 758             print '            // %s' % target
 759             print '            texture = 0;'
 760             print '            glGetIntegerv(%s, &texture);' % binding
 761             print '            if (glIsEnabled(%s) || texture) {' % target
 762             print '                json.beginMember("%s");' % target
 763             print '                json.beginObject();'
 764             self.dump_atoms(glGetTexParameter, target)
 765             # We only dump the first level parameters
 766             self.dump_atoms(glGetTexLevelParameter, target, "0")
 767             print '                json.endObject();'
 768             print '                json.endMember(); // %s' % target
 769             print '            }'
 770             print
 771         print '            json.endObject();'
 772         print '            json.endMember(); // GL_TEXTUREi'
 773         print '        }'
 774         print '        glActiveTexture(active_texture);'
 775         print '    }'
 776         print
 777
 778     def dump_current_program(self):
 779         print '    json.beginMember("shaders");'
 780         print '    json.beginObject();'
 781         print '    writeCurrentProgram(json);'
 782         for target in self.program_targets:
 783             print '    writeArbProgram(json, %s);' % target
 784         print '    json.endObject();'
 785         print '    json.endMember(); //shaders'
 786         print
 787
 788     def dump_textures(self):
 789         print '    {'
 790         print '        json.beginMember("textures");'
 791         print '        json.beginObject();'
 792         print '        GLint active_texture = GL_TEXTURE0;'
 793         print '        glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);'
 794         print '        GLint max_texture_coords = 0;'
 795         print '        glGetIntegerv(GL_MAX_TEXTURE_COORDS, &max_texture_coords);'
 796         print '        GLint max_combined_texture_image_units = 0;'
 797         print '        glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &max_combined_texture_image_units);'
 798         print '        GLint max_units = std::max(max_combined_texture_image_units, max_texture_coords);'
 799         print '        for (GLint unit = 0; unit < max_units; ++unit) {'
 800         print '            GLenum texture = GL_TEXTURE0 + unit;'
 801         print '            glActiveTexture(texture);'
 802         for target, binding in texture_targets:
 803             print '            writeTexture(json, %s, %s);' % (target, binding)
 804         print '        }'
 805         print '        glActiveTexture(active_texture);'
 806         print '        json.endObject();'
 807         print '        json.endMember(); // textures'
 808         print '    }'
 809         print
 810
 811     def dump_framebuffer(self):
 812         print '    json.beginMember("framebuffer");'
 813         print '    json.beginObject();'
 814         # TODO: Handle real FBOs
 815         print
 816         print '    GLint boundDrawFbo = 0, boundReadFbo = 0;'
 817         print '    glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &boundDrawFbo);'
 818         print '    glGetIntegerv(GL_READ_FRAMEBUFFER_BINDING, &boundReadFbo);'
 819         print '    if (!boundDrawFbo) {'
 820         print '        GLint depth_bits = 0;'
 821         print '        glGetIntegerv(GL_DEPTH_BITS, &depth_bits);'
 822         print '        GLint stencil_bits = 0;'
 823         print '        glGetIntegerv(GL_STENCIL_BITS, &stencil_bits);'
 824         print '        writeDrawBuffers(json, depth_bits, stencil_bits);'
 825         print '    } else {'
 826         print '        GLint colorRb, stencilRb, depthRb;'
 827         print '        GLint boundRb;'
 828         print '        glGetIntegerv(GL_RENDERBUFFER_BINDING, &boundRb);'
 829         print '        GLint drawbuffer = glretrace::double_buffer ? GL_BACK : GL_FRONT;'
 830         print '        glGetIntegerv(GL_DRAW_BUFFER, &drawbuffer);'
 831         print
 832         print '        glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,'
 833         print '                                              drawbuffer,'
 834         print '                                              GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,'
 835         print '                                              &colorRb);'
 836         print '        glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,'
 837         print '                                              GL_DEPTH_ATTACHMENT,'
 838         print '                                              GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,'
 839         print '                                              &depthRb);'
 840         print '        glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER,'
 841         print '                                              GL_STENCIL_ATTACHMENT,'
 842         print '                                              GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,'
 843         print '                                              &stencilRb);'
 844         print
 845         print '        GLint colorSamples, depthSamples, stencilSamples;'
 846         print '        GLuint rbs[3];'
 847         print '        GLint numRbs = 0;'
 848         print '        GLuint fboCopy = 0;'
 849         print '        glBindRenderbuffer(GL_RENDERBUFFER, colorRb);'
 850         print '        glGetRenderbufferParameteriv(GL_RENDERBUFFER,'
 851         print '                                     GL_RENDERBUFFER_SAMPLES, &colorSamples);'
 852         print '        glBindRenderbuffer(GL_RENDERBUFFER, depthRb);'
 853         print '        glGetRenderbufferParameteriv(GL_RENDERBUFFER,'
 854         print '                                     GL_RENDERBUFFER_SAMPLES, &depthSamples);'
 855         print '        glBindRenderbuffer(GL_RENDERBUFFER, stencilRb);'
 856         print '        glGetRenderbufferParameteriv(GL_RENDERBUFFER,'
 857         print '                                     GL_RENDERBUFFER_SAMPLES, &stencilSamples);'
 858         print '        glBindRenderbuffer(GL_RENDERBUFFER, boundRb);'
 859         print
 860         print '        if (colorSamples || depthSamples || stencilSamples) {'
 861         print '            //glReadPixels doesnt support multisampled buffers so we need'
 862         print '            // to blit the fbo to a temporary one'
 863         print '            fboCopy = downsampledFramebuffer(boundDrawFbo, drawbuffer,'
 864         print '                                             colorRb, depthRb, stencilRb,'
 865         print '                                             rbs, &numRbs);'
 866         print '        }'
 867         print '        glDrawBuffer(drawbuffer);'
 868         print '        glReadBuffer(drawbuffer);'
 869         print
 870         print '        writeDrawBuffers(json, depthRb, stencilRb);'
 871         print
 872         print '        if (fboCopy) {'
 873         print '            glBindFramebuffer(GL_FRAMEBUFFER, boundDrawFbo);'
 874         print '            glBindFramebuffer(GL_READ_FRAMEBUFFER, boundReadFbo);'
 875         print '            glBindFramebuffer(GL_DRAW_FRAMEBUFFER, boundDrawFbo);'
 876         print '            glBindRenderbuffer(GL_RENDERBUFFER_BINDING, boundRb);'
 877         print '            glDeleteRenderbuffers(numRbs, rbs);'
 878         print '            glDeleteFramebuffers(1, &fboCopy);'
 879         print '        }'
 880         print '    }'
 881         print
 882         print '    json.endObject();'
 883         print '    json.endMember(); // framebuffer'
 884         pass
 885
 886     def dump_atoms(self, getter, *args):
 887         for function, type, count, name in parameters:
 888             inflection = getter.inflector.radical + getter.suffix
 889             if inflection not in function.split(','):
 890                 continue
 891             if type is X:
 892                 continue
 893             print '        // %s' % name
 894             print '        {'
 895             type, value = getter(*(args + (name,)))
 896             print '            if (glGetError() != GL_NO_ERROR) {'
 897             #print '                std::cerr << "warning: %s(%s) failed\\n";' % (inflection, name)
 898             print '            } else {'
 899             print '                json.beginMember("%s");' % name
 900             JsonWriter().visit(type, value)
 901             print '                json.endMember();'
 902             print '            }'
 903             print '        }'
 904             print
 905
 906
 907 if __name__ == '__main__':
 908     StateDumper().dump()