git.mutantstargoat.com Git - fc2020/blob - estea-xdc2020.tex

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 126 \setbeamerfont{frametitle}{size=\small}
 127
 128 \setbeamertemplate{blocks}[default]
 129 \setbeamercolor{block title}{fg=amber,bg=black}
 130
 131 \title{\textbf{OpenGL and Vulkan Interoperability}}
 132 \author[Eleni Maria Stea <estea@igalia.com>]{\small{Eleni Maria Stea
 133 <estea@igalia.com>}\\\\\includegraphics{data/igalia.eps}}
 134 \date{XDC 2020}
 135
 136 \AtBeginSection[]
 137 {
 138   \begin{frame}
 139     \frametitle{Outline}
 140         \tableofcontents[currentsection]
 141   \end{frame}
 142 }
 143
 144 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 145 \begin{document}
 146 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 147
 148 \begin{frame}[plain]
 149 \titlepage
 150 \end{frame}
 151
 152 \begin{frame}
 153         \frametitle{Outline}
 154         \tableofcontents
 155 \end{frame}
 156
 157 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 158
 159 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 160 \section[Introduction]{OpenGL and Vulkan interoperability extensions}
 161 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 162
 163 \begin{frame}[fragile,c]
 164         \frametitle{OpenGL and Vulkan Interoperability Concept}
 165
 166         \begin{center}
 167         \textbf{\color{coolblack}{INTEROPERABILITY}}
 168         \vspace{0.5cm}
 169
 170 %
 171 %       The idea is to avoid unnecessary allocations and conversions when we
 172 %       exchange texture and buffer data across APIs.\\
 173 %
 174
 175         \vspace{0.5cm}
 176         \begin{tabular}{l}
 177                 \rowcolor{coolblack}
 178                 \multicolumn{1}{c}{
 179                 \color{paleaqua}{EXT\_external\_objects(\_fd) extensions allow:}
 180                 }\\
 181                 \rowcolor{platinum}
 182                 \\
 183                 \rowcolor{platinum}
 184                 \small{· \color{coolblack}{\textbf{Allocating} the resources (textures,
 185                 buffers) \textbf{once} from Vulkan.}}\\
 186                 \rowcolor{platinum}
 187                 \small{· \color{coolblack}{\textbf{Reusing} them \textbf{several times} from
 188                 both APIs.}}\\
 189                 \rowcolor{platinum}
 190                 \small{· \color{coolblack}{\textbf{Synchronizing} the APIs access to
 191                 the resources.}}\\
 192                 \rowcolor{platinum}
 193                 \\
 194         \end{tabular}
 195
 196                 \vspace{0.5cm}
 197         \end{center}
 198         \footnotesize{\textbf{Example:} a Vulkan VR compositor could allocate the
 199         left and right eye images but let other OpenGL processes to generate and
 200         write their texture data.}
 201 \end{frame}
 202
 203 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 204
 205 \begin{frame}[fragile]
 206         \frametitle{OpenGL extensions for interoperability}
 207
 208         \center{\textbf{\color{coolblack}{OpenGL EXTENSIONS}}}
 209         \vspace{0.2cm}
 210
 211         \setbeamertemplate{itemize/enumerate body begin}{\footnotesize}
 212         \setbeamertemplate{itemize/enumerate subbody begin}{\tiny}
 213         \setbeamertemplate{itemize/enumerate subsubbody begin}{\tiny}
 214
 215         \setbeamertemplate{itemize items}[triangle]
 216         \setbeamertemplate{blocks}[rounded][shadow]
 217
 218         \begin{block}{\color{afblue}{\footnotesize\textbf{EXT\_external\_object\_fd
 219                 (EXT\_memory\_object\_fd, EXT\_semaphore\_fd)}:}}
 220                 \begin{itemize}
 221                         \item enables an OpenGL application to import a memory object or
 222                                 semaphore from POSIX file descriptor external handles
 223                 \end{itemize}
 224         \end{block}
 225
 226         \vspace{0.2cm}
 227
 228         \begin{block}{\color{afblue}{\footnotesize\textbf{EXT\_external\_object
 229                 (EXT\_memory\_object, EXT\_semaphore)}:}}
 230                 \begin{itemize}
 231                         \item {functions to create GL objects, textures and buffers
 232                                 from Vulkan memory}
 233                         \item {functions to create GL semaphore objects that
 234                                 correspond to Vulkan ones}
 235                         \item {functions for synchronization}
 236                         \item {extends existing GL calls that set and query properties}
 237                 \end{itemize}
 238         \end{block}
 239 \end{frame}
 240
 241 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 242 \section[Interoperability on Mesa]{Additions to Mesa and Piglit}
 243 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 244 \begin{frame}
 245         \frametitle{Igalia's contributions}
 246
 247         \setbeamertemplate{blocks}[rounded]
 248         \center{
 249                 \normalsize{\textbf{\color{coolblack}{Work on the feature}}}
 250                 }
 251
 252         \vspace{0.5cm}
 253
 254         \begin{block}{Mesa}
 255                 \footnotesize{
 256                         Igalia contributed to the implementation of the interoperability
 257                         extensions for different {\color{deepjunglegreen}\textbf{Mesa
 258                         drivers}}.
 259                         }
 260         \end{block}
 261
 262         \vspace{0.5cm}
 263
 264         \begin{block}{Piglit (drivers testing framework)}
 265                 \footnotesize{
 266                         As there were \textbf{no CTS}, we've written a Vulkan framework for
 267                         {\color{coolblack}\textbf{Piglit}} and Vulkan/GL tests that cover the most common
 268                         EXT\_external\_objects(\_fd) use cases.
 269                         }
 270         \end{block}
 271 \end{frame}
 272
 273 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 274
 275 \begin{frame}
 276         \frametitle{Additions to Mesa (the details)}
 277
 278         \center{
 279                 \normalsize{\textbf{\color{coolblack}{Contributions to Mesa
 280         drivers}}}
 281         }
 282         \tiny{
 283                 \begin{table}[t]
 284                         \begin{tabularx}{\textwidth}{|l|X|l|}
 285                                 \hline
 286                                 \rowcolor{paleaqua}
 287                                 Driver & Igalia's Contributions & Status \\
 288                                 \hline
 289                                 \hline
 290                                 \rowcolor{platinum}
 291                                 iris & \textbf{\color{coolblack}implemented} EXT\_external\_objects,
 292                                 EXT\_external\_objects\_fd & \cellcolor{babypink}{under review (MR
 293                                 !4337)}\\
 294                                 \rowcolor{whitesmoke}
 295                                 freedreno & \textbf{\color{coolblack}implemented} EXT\_external\_objects,
 296                                 EXT\_external\_objects\_fd & \cellcolor{green}{upstream} \\
 297                                 \rowcolor{platinum}
 298                                 radeonsi & \textbf{\color{coolblack}fixes} to the already implemented feature &
 299                                 \cellcolor{bananamania}{work in
 300                                 progress (WIP MR !6364)} \\
 301                                 \rowcolor{whitesmoke}
 302                                 i965 & helped with the \textbf{\color{coolblack}review}, patches & \cellcolor{babypink}{under review
 303                                 (Draft MR !5594)}\\
 304                                 \hline
 305                         \end{tabularx}
 306                 \end{table}
 307         }
 308
 309         \center{
 310                 \normalsize{\textbf{\color{coolblack}{Contributors, reviewers,
 311                 people who helped!}}}
 312         }
 313
 314         \tiny{
 315                 \begin{table}[ht]
 316                         \begin{tabularx}{\textwidth}{|l|X|X|}
 317                                 \hline
 318                                 \rowcolor{paleaqua}
 319                                 Driver & Patches & Reviews, Comments, Advice\\
 320                                 \hline
 321                                 \hline
 322                                 \rowcolor{platinum}
 323                                 iris & Juan A. Suárez Romero, Eleni Maria Stea, Tapani Pälli, Eduardo Lima Mitev
 324                                 & Tapani Pälli, Rohan Garg, Eric Engestrom, Kenneth Graunke,
 325                                 Jason Ekstrand, Oscar Barenys, Daniel Stone, Matt Turner, Tomeu Vizoso \\
 326                                 \rowcolor{whitesmoke}
 327                                 freedreno & Eduardo Lima Mitev, Hyunjun Ko & Rob
 328                                 Clark, Marek Olšák, Jonathan Marek, Rohan Garg\\
 329                                 \rowcolor{platinum}
 330                                 radeonsi & The feature was implemented by
 331                                 AMD a few years ago and we are mostly working on fixes (WIP).
 332                                 & feedback from: Bas Nieuwenhuizen, Marek Olšák \\
 333                                 \rowcolor{whitesmoke}
 334                                 i965 & Rohan Garg, Juan A. Suárez Romero, Tapani Pälli
 335                                 & Tomeu Vizoso, Eleni Maria Stea, Oscar Barenys \\
 336                                 \hline
 337                         \end{tabularx}
 338                 \end{table}
 339         }
 340
 341         \tiny{
 342                 \begin{itemize}
 343                         \item {The information above was accurate at the beginning of
 344                                 September when I pre-recorded this presentation! Apologies if
 345                                 I've not included someone or something!}
 346                 \end{itemize}
 347         }
 348 \end{frame}
 349
 350 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 351
 352 \begin{frame}[fragile]
 353         \frametitle{Additions to Piglit (the details) I}
 354
 355         \begin{center}
 356                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit I }}}
 357         \end{center}
 358
 359         \tiny{
 360                 \begin{center}\textbf{Reusing color images:}\end{center}
 361                 \begin{table}[t]
 362                         \begin{tabularx}{\textwidth}{|l|X|c|l|}
 363                                 \hline
 364                                 \rowcolor{paleaqua}
 365                                 Test name & Use case
 366                                 & Output & Status\\
 367                                 \hline
 368                                 \hline
 369                                 \rowcolor{platinum}
 370                                 vk-image-overwrite &
 371                                 The test allocates images of different formats and
 372                                 tiling modes using Vulkan and fills their pixels using OpenGL.
 373                                 &
 374                                 \adjustbox{valign=t, margin=1ex, padding=1ex}{\includegraphics[height=1cm]{shots/image_overwrite.png}} & \cellcolor{green}{upstream}\\
 375                                 \hline
 376                                 \rowcolor{whitesmoke}
 377                                 vk-image-display &
 378                                 The test allocates a Vulkan image and renders a
 379                                 pattern to it using Vulkan. Then it displays it using OpenGL.
 380                                 The test uses semaphores to synchronize the GL, Vulkan access to
 381                                 the texture.\vspace{0.3cm}  &
 382                                 \adjustbox{valign=t, margin=1ex,
 383                                 padding=1ex}{\includegraphics[height=1cm]{shots/image_display.png}}
 384                                 & \cellcolor{green}{upstream}\\
 385                                 \hline
 386                                 \rowcolor{platinum}
 387                                 vk-image-display-overwrite &
 388                                 Similar to the previous ones, but the Vulkan texture data are
 389                                 overwritten again with OpenGL and then read back from Vulkan. &
 390                                 \adjustbox{valign=t, margin=1ex,
 391                                 padding=1ex}{\includegraphics[height=1cm]{shots/image_display_overwrite.png}}
 392                                 & \cellcolor{green}{upstream}\\
 393                                 \hline
 394                         \end{tabularx}
 395                 \end{table}
 396         }
 397 \end{frame}
 398
 399 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 400
 401 \begin{frame}[fragile]
 402         \frametitle{Additions to Piglit (the details) II}
 403
 404         \begin{center}
 405                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit II }}}
 406         \end{center}
 407
 408         \tiny{
 409                 \begin{center}\textbf{Reusing the depth and stencil buffer:}\end{center}
 410                 \begin{table}[t]
 411                         \begin{tabularx}{\textwidth}{|l|X|c|l|}
 412                                 \hline
 413                                 \rowcolor{paleaqua}
 414                                 Test name & Use case
 415                                 & Output & Status\\
 416                                 \hline
 417                                 \hline
 418                                 \rowcolor{platinum}
 419                                 vk-depth-display & A Vulkan quad is rendered at a specific depth
 420                                 \texttt{d1}. The Vulkan depth buffer is used as a depth attachment while rendering
 421                                 a blue quad in an OpenGL FBO with the depth test enabled in a
 422                                 depth \texttt{d2 < d1}. We see the framebuffer color where
 423                                 \texttt{imported\_depth > depth}.
 424                                 \vspace{0.3cm}
 425                                 &
 426                                 \adjustbox{valign=t, margin=1ex,
 427                                 padding=1ex}{\includegraphics[height=1cm]{shots/depth.png}}
 428                                 & \cellcolor{babypink}{under review}\\
 429                                 \hline
 430                                 \rowcolor{whitesmoke}
 431                                 vk-stencil-display & Similarly, a small quad is rendered with
 432                                 Vulkan and the stencil test enabled. It is
 433                                 then imported and used by OpenGL that renders a fullscreen quad
 434                                 with the stencil test enabled. Pixels that pass the stencil test
 435                                 have the quad color and the rest the framebuffer
 436                                 color.
 437                                 \vspace{0.3cm} &
 438                                 \adjustbox{valign=t, margin=1ex,
 439                                 padding=1ex}{\includegraphics[height=1cm]{shots/stencil.png}}
 440                                 & \cellcolor{babypink}{under review}\\
 441                                 \hline
 442                         \end{tabularx}
 443                 \end{table}
 444                 }
 445 \end{frame}
 446
 447 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 448
 449 \begin{frame}[fragile]
 450         \frametitle{Additions to Piglit (the details) III}
 451
 452         \begin{center}
 453                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit III }}}
 454         \end{center}
 455
 456         \tiny{
 457                 \begin{center}\textbf{Reusing a pixel buffer:}\end{center}
 458
 459                 \begin{table}[t]
 460                         \begin{tabularx}{\textwidth}{|l|X|l|l|}
 461                                 \hline
 462                                 \rowcolor{paleaqua}
 463                                 Test name & Use case
 464                                 & Output & Status\\
 465                                 \hline
 466                                 \hline
 467                                 \rowcolor{platinum}
 468                                 vk-buf-exchange &
 469                                 The test renders an image and copies it to a buffer using
 470                                 Vulkan. Then, the buffer is imported in OpenGL and is used as
 471                                 pixel storage for an OpenGL texture. OpenGL renders the texture
 472                                 and we validate that it contains the pattern that was rendered
 473                                 by Vulkan. \vspace{0.3cm} &
 474                                 \adjustbox{valign=t, margin=1ex,
 475                                 padding=1ex}{\includegraphics[height=1cm]{shots/image_display.png}}
 476                                 & \cellcolor{green}{upstream}\\
 477                                 \hline
 478                                 \rowcolor{whitesmoke}
 479                                 vk-pix-buf-update-errors &
 480                                 The test is similar to the previous one with the difference that
 481                                 we attempt to overwrite the buffer using BufferSubData. We
 482                                 validate that an invalid operation error is generated and the
 483                                 contents of the buffer remain unchanged after the
 484                                 attempt.\vspace{0.3cm} &
 485                                 \adjustbox{valign=t, margin=1ex,
 486                                 padding=1ex}{\includegraphics[height=1cm]{shots/image_display.png}}
 487                                 & \cellcolor{blond}{work in progress}\\
 488                                 \hline
 489                         \end{tabularx}
 490                 \end{table}
 491         }
 492 \end{frame}
 493
 494 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 495
 496 \begin{frame}[fragile]
 497         \frametitle{Additions to Piglit (the details) IV}
 498
 499         \begin{center}
 500                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit IV }}}
 501         \end{center}
 502
 503         \tiny{
 504                 \begin{center}\textbf{Reusing a vertex buffer:}\end{center}
 505                 \begin{table}[t]
 506                         \begin{tabularx}{\textwidth}{|l|X|l|l|}
 507                                 \hline
 508                                 \rowcolor{paleaqua}
 509                                 Test name & Use case
 510                                 & Output & Status\\
 511                                 \hline
 512                                 \hline
 513                                 \rowcolor{platinum}
 514                                 vk-vert-buf-update-errors &
 515                                 A Vulkan vertex buffer is allocated and filled with data so that
 516                                 the vertices create quads that follow a chess pattern. This
 517                                 vertex buffer is used by OpenGL that clears the screen with red
 518                                 and paints the pixels blue.
 519                                 We validate that the geometry is correct and that we can't
 520                                 overwrite it using \texttt{glBufferSubdata}. \vspace{0.3cm} &
 521                                 \adjustbox{valign=t, margin=1ex,
 522                                 padding=1ex}{\includegraphics[height=1cm]{shots/vert_buf_update_errors.png}}
 523                                 & \cellcolor{blond}{work in progress}\\
 524                                 \hline
 525                                 \rowcolor{whitesmoke}
 526                                 vk-vert-buf-reuse &
 527                                 Similar to the previous test, but the Vulkan vertex buffer is
 528                                 used in a Vulkan renderpass afterwards to make sure Vulkan can
 529                                 read back and reuse the vertex buffer.\vspace{0.3cm} &
 530                                 \adjustbox{valign=t, margin=1ex,
 531                                 padding=1ex}{\includegraphics[height=1cm]{shots/vert_buf_update_errors.png}}
 532                                 &
 533                                 \cellcolor{blond}{work in progress}\\
 534                                 \hline
 535                         \end{tabularx}
 536                 \end{table}
 537         }
 538 \end{frame}
 539
 540 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 541
 542 \begin{frame}[fragile]
 543         \frametitle{Additions to Piglit (the details) V}
 544         \begin{center}
 545                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit V }}}\\
 546                 \vspace{0.5cm}
 547                 \scriptsize{Same as with mesa many people helped us with the work on the
 548                 tests:}
 549         \end{center}
 550
 551         \tiny{
 552                 \begin{table}[t]
 553                         \begin{tabularx}{\textwidth}{|l|X|}
 554                                 \hline
 555                                 \rowcolor{paleaqua}
 556                                 Contributors & Contributions \\
 557                                 \hline
 558                                 \hline
 559                                 \rowcolor{platinum}
 560                                 Eleni Maria Stea & tests, Vulkan framework code \\
 561                                 \rowcolor{whitesmoke}
 562                                 Juan A. Suárez Romero & contributions to the framework, and
 563                                 vk-image-overwrite, testing \\
 564                                 \rowcolor{platinum}
 565                                 Tapani Pälli (\textit{many thanks!}) & reviews, testing and patches
 566                                 for the framework \\
 567                                 \rowcolor{whitesmoke}
 568                                 Bas Nieuwenhuizen & framework patch to support dedicated memory \\
 569                                 \rowcolor{platinum}
 570                                 Topi Pohjolainen & we've used some old patches of him as an example
 571                                 at the very beginning\\
 572                                 \hline
 573                         \end{tabularx}
 574                 \end{table}
 575         }
 576
 577         \begin{itemize}
 578                 \item Also thanks to Germán Poo Caamaño who helped tidying up the
 579                         initial mess of the Vulkan framework commits.
 580                 \item Again, this information was accurate when I prepared and
 581                         pre-recorded the slides. Sorry if I am missing someone or something!
 582         \end{itemize}
 583 \end{frame}
 584
 585 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 586
 587 \begin{frame}[fragile]
 588         \frametitle{Piglit Results}
 589         \begin{block}{\begin{center}Conclusions from running the tests:\end{center}}
 590                 \begin{itemize}
 591                                 \vspace{0.5cm}
 592                         \item The feature seems to work well for the most common use cases in
 593                                 all mesa drivers mentioned before.\\
 594                                 \vspace{0.5cm}
 595                         \item Depth and stencil buffer exchange is only supported on
 596                                 proprietary Nvidia drivers, unfortunately not on Mesa yet.\\
 597                                 \vspace{0.5cm}
 598                         \item radeonsi needs some fixes to better support buffers and
 599                                 optimal tiling (WIP).
 600                                 \vspace{0.5cm}
 601                 \end{itemize}
 602         \end{block}
 603
 604 \end{frame}
 605
 606 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 607
 608 %\begin{frame}[fragile]
 609 %       \frametitle{vk-image-overwrite}
 610 %       \begin{block}{vk-image-overwrite}
 611 %               \lstinline[language=C++, style=CStyle]{glCreateMemoryObjectsEXT(1, gl_mem_obj); }
 612 %       \end{block}
 613 %\end{frame}
 614
 615 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 616 \section[Q \& A]{Questions}
 617 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 618
 619 \begin{frame}
 620         \frametitle{Questions?}
 621         {\fontsize{8}{7}\selectfont
 622         \begin{center}
 623                 \begin{figure}
 624                 \includegraphics[scale=0.04]{data/qmark.png}
 625                 \end{figure}
 626                 \vspace{0.7cm}
 627                 {\large E-mail: {\color{coolblack}estea@igalia.com}}\\
 628                 {\large IRC/Freenode: {\color{coolblack}hikiko}}\\
 629         \end{center}
 630         }
 631 \end{frame}
 632
 633 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 634 \section[References]{References}
 635 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 636 %\setbeamertemplate{bibliography entry title}{}
 637 %\setbeamertemplate{bibliography entry location}{}
 638 %\setbeamertemplate{bibliography entry note}{}
 639 \setbeamerfont{bibliography item}{size=\footnotesize}
 640 \setbeamerfont{bibliography entry author}{size=\footnotesize}
 641 \setbeamerfont{bibliography entry title}{size=\footnotesize}
 642 \setbeamerfont{bibliography entry year}{size=\footnotesize}
 643 \setbeamerfont{bibliography entry note}{size=\footnotesize}
 644
 645 \begin{frame}[allowframebreaks]
 646         \frametitle{Links}
 647         \bibliographystyle{unsrt}
 648         \bibliography{bib/references.bib}
 649         \nocite{*}
 650 \end{frame}
 651
 652 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 653
 654 \begin{frame}[plain]
 655 \begin{minipage}[b][0.6\textheight]{\linewidth}
 656         \begin{picture}(0, 0)
 657                 \put(0, -76){%
 658                         \pgfuseimage{igaliabglight}
 659                         }
 660                         \begin{minipage}[b][0.4\textheight]{\linewidth}
 661                                 \begin{figure}
 662                                         \includegraphics[scale=0.6]{data/mesa.png}
 663                                 \end{figure}
 664                         \end{minipage}
 665                 \put(-200, 0) {
 666                         \hfill \huge{\textbf{\color{coolblack}Thank you!}}\\
 667                         }
 668         \end{picture}
 669 \end{minipage}
 670
 671 \end{frame}
 672 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 673
 674 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 675 \end{document}