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} resources (like 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 VR compositor where the left and right eye
 199         images are allocated and displayed by Vulkan but their contents are filled by
 200         OpenGL processes.}
 201 \end{frame}
 202
 203 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 204
 205 \begin{frame}[fragile]
 206         \frametitle{OpenGL extensions for interoperability on Linux}
 207
 208         \center{\textbf{\color{coolblack}{OpenGL Extensions (Linux)}}}
 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                                 (\textbf{Linux only!})
 224                 \end{itemize}
 225         \end{block}
 226
 227         \vspace{0.2cm}
 228
 229         \begin{block}{\color{afblue}{\footnotesize\textbf{EXT\_external\_object
 230                 (EXT\_memory\_object, EXT\_semaphore)}:}}
 231                 \begin{itemize}
 232                         \item enables an OpenGL application to:
 233                                 \small{
 234                                         \begin{itemize}
 235                                                         \setbeamertemplate{itemize/enumerate subbody begin}{\normalsize}
 236
 237                                         \item[--] create OpenGL objects, textures buffers and semaphores from
 238                                                 imported Vulkan memory
 239                                         \item[--] synchronize the rendering using the GL semaphores
 240                                 \end{itemize}
 241                                 }
 242                         \item {extends existing GL calls that set and query properties}
 243                 \end{itemize}
 244         \end{block}
 245 \end{frame}
 246
 247 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 248 \section[Interoperability on Mesa]{Additions to Mesa and Piglit}
 249 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 250 \begin{frame}
 251         \frametitle{Igalia's contributions}
 252
 253         \setbeamertemplate{blocks}[rounded]
 254         \center{
 255                 \normalsize{\textbf{\color{coolblack}{Work on the feature}}}
 256                 }
 257
 258         \vspace{0.5cm}
 259
 260         \begin{block}{Mesa}
 261                 \footnotesize{
 262                         Igalia contributed to the implementation of the interoperability
 263                         extensions for different {\color{deepjunglegreen}\textbf{Mesa
 264                         drivers}}.
 265                         }
 266         \end{block}
 267
 268         \vspace{0.5cm}
 269
 270         \begin{block}{Piglit (drivers testing framework)}
 271                 \footnotesize{
 272                         As there were \textbf{no CTS}, we've written a Vulkan framework for
 273                         {\color{coolblack}\textbf{Piglit}} and Vulkan/GL tests that cover
 274                         some common
 275                         EXT\_external\_objects(\_fd) use cases.
 276                         }
 277         \end{block}
 278 \end{frame}
 279
 280 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 281
 282 \begin{frame}
 283         \frametitle{Additions to Mesa (the details)}
 284
 285         \center{
 286                 \normalsize{\textbf{\color{coolblack}{Contributions to Mesa
 287         drivers}}}
 288         }
 289         \tiny{
 290                 \begin{table}[t]
 291                         \begin{tabularx}{\textwidth}{|l|X|l|}
 292                                 \hline
 293                                 \rowcolor{paleaqua}
 294                                 Driver & Igalia's Contributions & Status \\
 295                                 \hline
 296                                 \hline
 297                                 \rowcolor{platinum}
 298                                 iris & \textbf{\color{coolblack}implemented} EXT\_external\_objects,
 299                                 EXT\_external\_objects\_fd & \cellcolor{babypink}{under review (MR
 300                                 !4337)}\\
 301                                 \rowcolor{whitesmoke}
 302                                 freedreno & \textbf{\color{coolblack}implemented} EXT\_external\_objects,
 303                                 EXT\_external\_objects\_fd & \cellcolor{green}{upstream} \\
 304                                 \rowcolor{platinum}
 305                                 radeonsi & \textbf{\color{coolblack}fixes} to the already implemented feature &
 306                                 \cellcolor{bananamania}{work in
 307                                 progress (WIP MR !6364)} \\
 308                                 \rowcolor{whitesmoke}
 309                                 i965 & helped with the \textbf{\color{coolblack}review}, patches & \cellcolor{babypink}{under review
 310                                 (Draft MR !5594)}\\
 311                                 \hline
 312                         \end{tabularx}
 313                 \end{table}
 314         }
 315
 316         \center{
 317                 \normalsize{\textbf{\color{coolblack}{Contributors, reviewers,
 318                 people who helped!}}}
 319         }
 320
 321         \tiny{
 322                 \begin{table}[ht]
 323                         \begin{tabularx}{\textwidth}{|l|X|X|}
 324                                 \hline
 325                                 \rowcolor{paleaqua}
 326                                 Driver & Patches & Reviews, Comments, Advice\\
 327                                 \hline
 328                                 \hline
 329                                 \rowcolor{platinum}
 330                                 iris & Juan A. Suárez Romero, Eleni Maria Stea, Tapani Pälli, Eduardo Lima Mitev
 331                                 & Tapani Pälli, Rohan Garg, Eric Engestrom, Kenneth Graunke,
 332                                 Jason Ekstrand, Oscar Barenys, Daniel Stone, Matt Turner, Tomeu Vizoso \\
 333                                 \rowcolor{whitesmoke}
 334                                 freedreno & Eduardo Lima Mitev, Hyunjun Ko & Rob
 335                                 Clark, Marek Olšák, Jonathan Marek, Rohan Garg\\
 336                                 \rowcolor{platinum}
 337                                 radeonsi & The feature was implemented by
 338                                 AMD a few years ago and we are mostly working on fixes (WIP).
 339                                 & feedback from: Bas Nieuwenhuizen, Marek Olšák \\
 340                                 \rowcolor{whitesmoke}
 341                                 i965 & Rohan Garg, Juan A. Suárez Romero, Tapani Pälli
 342                                 & Tomeu Vizoso, Eleni Maria Stea, Oscar Barenys \\
 343                                 \hline
 344                         \end{tabularx}
 345                 \end{table}
 346         }
 347
 348         \tiny{
 349                 \begin{itemize}
 350                         \item {The information above was accurate at the beginning of
 351                                 September when I pre-recorded this presentation! Apologies if
 352                                 I've not included someone or something!}
 353                 \end{itemize}
 354         }
 355 \end{frame}
 356
 357 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 358
 359 \begin{frame}[fragile]
 360         \frametitle{Additions to Piglit (the details) I}
 361
 362         \begin{center}
 363                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit I }}}
 364         \end{center}
 365
 366         \tiny{
 367                 \begin{center}\textbf{Reusing color images:}\end{center}
 368                 \begin{table}[t]
 369                         \begin{tabularx}{\textwidth}{|l|X|c|l|}
 370                                 \hline
 371                                 \rowcolor{paleaqua}
 372                                 Test name & Description
 373                                 & Output & Status\\
 374                                 \hline
 375                                 \hline
 376                                 \rowcolor{platinum}
 377                                 vk-image-overwrite &
 378                                 The test allocates images of different formats and
 379                                 tiling modes using Vulkan and fills their pixels using OpenGL.
 380                                 &
 381                                 \adjustbox{valign=t, margin=1ex, padding=1ex}{\includegraphics[height=1cm]{shots/image_overwrite.png}} & \cellcolor{green}{upstream}\\
 382                                 \hline
 383                                 \rowcolor{whitesmoke}
 384                                 vk-image-display &
 385                                 The test allocates a Vulkan image and renders a
 386                                 pattern to it using Vulkan. Then it displays it using OpenGL.
 387                                 The test uses semaphores to synchronize the GL, Vulkan access to
 388                                 the texture.\vspace{0.3cm}  &
 389                                 \adjustbox{valign=t, margin=1ex,
 390                                 padding=1ex}{\includegraphics[height=1cm]{shots/image_display.png}}
 391                                 & \cellcolor{green}{upstream}\\
 392                                 \hline
 393                                 \rowcolor{platinum}
 394                                 vk-image-display-overwrite &
 395                                 Similar to the previous ones, but the Vulkan texture data are
 396                                 overwritten again with OpenGL and then read back from Vulkan. &
 397                                 \adjustbox{valign=t, margin=1ex,
 398                                 padding=1ex}{\includegraphics[height=1cm]{shots/image_display_overwrite.png}}
 399                                 & \cellcolor{green}{upstream}\\
 400                                 \hline
 401                         \end{tabularx}
 402                 \end{table}
 403         }
 404 \end{frame}
 405
 406 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 407
 408 \begin{frame}[fragile]
 409         \frametitle{Additions to Piglit (the details) II}
 410
 411         \begin{center}
 412                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit II }}}
 413         \end{center}
 414
 415         \tiny{
 416                 \begin{center}\textbf{Reusing the depth and stencil buffer:}\end{center}
 417                 \begin{table}[t]
 418                         \begin{tabularx}{\textwidth}{|l|X|c|l|}
 419                                 \hline
 420                                 \rowcolor{paleaqua}
 421                                 Test name & Description
 422                                 & Output & Status\\
 423                                 \hline
 424                                 \hline
 425                                 \rowcolor{platinum}
 426                                 vk-depth-display & On the Vulkan side we draw a quad at a
 427                                 specific depth to fill the z buffer with a recognizable pattern.
 428                                 Then we use the Vulkan z buffer from OpenGL, where we clear the
 429                                 framebuffer to green and render a
 430                                 blue fullscreen quad positioned on the z-axis further away than
 431                                 the depth of the original quad. If the z buffer has been imported
 432                                 correctly the blue quad should be partially obscured due to the
 433                                 depth test failing in the middle.
 434                                 \vspace{0.3cm}
 435                                 &
 436                                 \adjustbox{valign=t, margin=1ex,
 437                                 padding=1ex}{\includegraphics[height=1cm]{shots/depth.png}}
 438                                 & \cellcolor{babypink}{under review}\\
 439                                 \hline
 440                                 \rowcolor{whitesmoke}
 441                                 vk-stencil-display & Similarly, a small quad is rendered with
 442                                 Vulkan and the stencil test enabled. It is
 443                                 then imported and used by OpenGL that renders a fullscreen quad
 444                                 with the stencil test enabled. Pixels that pass the stencil test
 445                                 have the quad color and the rest the framebuffer
 446                                 color.
 447                                 \vspace{0.3cm} &
 448                                 \adjustbox{valign=t, margin=1ex,
 449                                 padding=1ex}{\includegraphics[height=1cm]{shots/stencil.png}}
 450                                 & \cellcolor{babypink}{under review}\\
 451                                 \hline
 452                         \end{tabularx}
 453                 \end{table}
 454                 }
 455 \end{frame}
 456
 457 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 458
 459 \begin{frame}[fragile]
 460         \frametitle{Additions to Piglit (the details) III}
 461
 462         \begin{center}
 463                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit III }}}
 464         \end{center}
 465
 466         \tiny{
 467                 \begin{center}\textbf{Reusing a pixel buffer:}\end{center}
 468
 469                 \begin{table}[t]
 470                         \begin{tabularx}{\textwidth}{|l|X|l|l|}
 471                                 \hline
 472                                 \rowcolor{paleaqua}
 473                                 Test name & Description
 474                                 & Output & Status\\
 475                                 \hline
 476                                 \hline
 477                                 \rowcolor{platinum}
 478                                 vk-buf-exchange &
 479                                 The test renders an image and copies it to a buffer using
 480                                 Vulkan. Then, the buffer is imported in OpenGL and is used as
 481                                 pixel storage for an OpenGL texture. OpenGL renders the texture
 482                                 and we validate that it contains the pattern that was rendered
 483                                 by Vulkan. \vspace{0.3cm} &
 484                                 \adjustbox{valign=t, margin=1ex,
 485                                 padding=1ex}{\includegraphics[height=1cm]{shots/image_display.png}}
 486                                 & \cellcolor{green}{upstream}\\
 487                                 \hline
 488                                 \rowcolor{whitesmoke}
 489                                 vk-pix-buf-update-errors &
 490                                 The test is similar to the previous one with the difference that
 491                                 we attempt to overwrite the buffer using BufferSubData. We
 492                                 validate that an invalid operation error is generated and the
 493                                 contents of the buffer remain unchanged after the
 494                                 attempt.\vspace{0.3cm} &
 495                                 \adjustbox{valign=t, margin=1ex,
 496                                 padding=1ex}{\includegraphics[height=1cm]{shots/image_display.png}}
 497                                 & \cellcolor{blond}{work in progress}\\
 498                                 \hline
 499                         \end{tabularx}
 500                 \end{table}
 501         }
 502 \end{frame}
 503
 504 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 505
 506 \begin{frame}[fragile]
 507         \frametitle{Additions to Piglit (the details) IV}
 508
 509         \begin{center}
 510                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit IV }}}
 511         \end{center}
 512
 513         \tiny{
 514                 \begin{center}\textbf{Reusing a vertex buffer:}\end{center}
 515                 \begin{table}[t]
 516                         \begin{tabularx}{\textwidth}{|l|X|l|l|}
 517                                 \hline
 518                                 \rowcolor{paleaqua}
 519                                 Test name & Description
 520                                 & Output & Status\\
 521                                 \hline
 522                                 \hline
 523                                 \rowcolor{platinum}
 524                                 vk-vert-buf-update-errors &
 525                                 A Vulkan vertex buffer is allocated and filled with data so that
 526                                 the vertices create quads that follow a chess pattern. This
 527                                 vertex buffer is used by OpenGL that clears the screen with red
 528                                 and paints the pixels blue.
 529                                 We validate that the geometry is correct and that we can't
 530                                 overwrite it using \texttt{glBufferSubdata}. \vspace{0.3cm} &
 531                                 \adjustbox{valign=t, margin=1ex,
 532                                 padding=1ex}{\includegraphics[height=1cm]{shots/vert_buf_update_errors.png}}
 533                                 & \cellcolor{blond}{work in progress}\\
 534                                 \hline
 535                                 \rowcolor{whitesmoke}
 536                                 vk-vert-buf-reuse &
 537                                 Similar to the previous test, but the Vulkan vertex buffer is
 538                                 used in a Vulkan renderpass afterwards to make sure Vulkan can
 539                                 read back and reuse the vertex buffer.\vspace{0.3cm} &
 540                                 \adjustbox{valign=t, margin=1ex,
 541                                 padding=1ex}{\includegraphics[height=1cm]{shots/vert_buf_update_errors.png}}
 542                                 &
 543                                 \cellcolor{blond}{work in progress}\\
 544                                 \hline
 545                         \end{tabularx}
 546                 \end{table}
 547         }
 548 \end{frame}
 549
 550 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 551
 552 \begin{frame}[fragile]
 553         \frametitle{Additions to Piglit (the details) V}
 554         \begin{center}
 555                 \normalsize{\textbf{\color{coolblack}{Contributions to Piglit V }}}\\
 556                 \vspace{0.5cm}
 557                 \scriptsize{Same as with mesa many people helped us with the work on the
 558                 tests:}
 559         \end{center}
 560
 561         \tiny{
 562                 \begin{table}[t]
 563                         \begin{tabularx}{\textwidth}{|l|X|}
 564                                 \hline
 565                                 \rowcolor{paleaqua}
 566                                 Contributors & Contributions \\
 567                                 \hline
 568                                 \hline
 569                                 \rowcolor{platinum}
 570                                 Eleni Maria Stea & tests, Vulkan framework code \\
 571                                 \rowcolor{whitesmoke}
 572                                 Juan A. Suárez Romero & contributions to the framework, and
 573                                 vk-image-overwrite, testing \\
 574                                 \rowcolor{platinum}
 575                                 Tapani Pälli (\textit{\color{coolblack}{many thanks!}}) & reviews, testing and patches
 576                                 for the framework \\
 577                                 \rowcolor{whitesmoke}
 578                                 Bas Nieuwenhuizen & framework patch to support dedicated memory \\
 579                                 \rowcolor{platinum}
 580                                 Topi Pohjolainen & we've used some old patches of him as an example
 581                                 at the very beginning\\
 582                                 \hline
 583                         \end{tabularx}
 584                 \end{table}
 585         }
 586
 587         \begin{itemize}
 588                 \item Also thanks to Germán Poo Caamaño who helped tidying up the
 589                         initial mess of the Vulkan framework commits.
 590                 \item Again, this information was accurate when I prepared and
 591                         pre-recorded the slides. Sorry if I am missing someone or something!
 592         \end{itemize}
 593 \end{frame}
 594
 595 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 596
 597 \begin{frame}[fragile]
 598         \frametitle{Piglit Results}
 599         \begin{block}{\begin{center}Conclusions from running the tests:\end{center}}
 600                 \begin{itemize}
 601                                 \vspace{0.5cm}
 602                         \item The feature seems to work well for the most use cases tested in
 603                                 all mesa drivers mentioned before.\\
 604                                 \vspace{0.5cm}
 605                         \item Depth and stencil buffer exchange is only supported on
 606                                 proprietary Nvidia driver, unfortunately not on Mesa yet.\\
 607                                 \vspace{0.5cm}
 608                         \item radeonsi needs some fixes to better support buffers and
 609                                 optimal tiling (WIP).
 610                                 \vspace{0.5cm}
 611                 \end{itemize}
 612         \end{block}
 613
 614 \end{frame}
 615
 616 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 617
 618 %\begin{frame}[fragile]
 619 %       \frametitle{vk-image-overwrite}
 620 %       \begin{block}{vk-image-overwrite}
 621 %               \lstinline[language=C++, style=CStyle]{glCreateMemoryObjectsEXT(1, gl_mem_obj); }
 622 %       \end{block}
 623 %\end{frame}
 624
 625 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 626 \section[Q \& A]{Questions}
 627 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 628
 629 \begin{frame}
 630         \frametitle{Questions?}
 631         {\fontsize{8}{7}\selectfont
 632         \begin{center}
 633                 \begin{figure}
 634                 \includegraphics[scale=0.04]{data/qmark.png}
 635                 \end{figure}
 636                 \vspace{0.7cm}
 637                 {\large E-mail: {\color{coolblack}estea@igalia.com}}\\
 638                 {\large IRC/Freenode: {\color{coolblack}hikiko}}\\
 639         \end{center}
 640         }
 641 \end{frame}
 642
 643 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 644 \section[References]{References}
 645 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 646 %\setbeamertemplate{bibliography entry title}{}
 647 %\setbeamertemplate{bibliography entry location}{}
 648 %\setbeamertemplate{bibliography entry note}{}
 649 \setbeamerfont{bibliography item}{size=\footnotesize}
 650 \setbeamerfont{bibliography entry author}{size=\footnotesize}
 651 \setbeamerfont{bibliography entry title}{size=\footnotesize}
 652 \setbeamerfont{bibliography entry year}{size=\footnotesize}
 653 \setbeamerfont{bibliography entry note}{size=\footnotesize}
 654
 655 \begin{frame}[allowframebreaks]
 656         \frametitle{Links}
 657         \bibliographystyle{unsrt}
 658         \bibliography{bib/references.bib}
 659         \nocite{*}
 660 \end{frame}
 661
 662 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 663
 664 \begin{frame}[plain]
 665 \begin{minipage}[b][0.6\textheight]{\linewidth}
 666         \begin{picture}(0, 0)
 667                 \put(0, -76){%
 668                         \pgfuseimage{igaliabglight}
 669                         }
 670                         \begin{minipage}[b][0.4\textheight]{\linewidth}
 671                                 \begin{figure}
 672                                         \includegraphics[scale=0.6]{data/mesa.png}
 673                                 \end{figure}
 674                         \end{minipage}
 675                 \put(-200, 0) {
 676                         \hfill \huge{\textbf{\color{coolblack}Thank you!}}\\
 677                         }
 678         \end{picture}
 679 \end{minipage}
 680
 681 \end{frame}
 682 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 683
 684 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 685 \end{document}