From 9941a4bb8360a9bad97a7cf6bacc3c818022e99f Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Sun, 24 Jan 2021 12:05:18 +1100
Subject: [PATCH] [client] egl: runtime detect support for
 `glEGLImageTargetTexture2DOES`

---
 client/renderers/EGL/CMakeLists.txt |  1 +
 client/renderers/EGL/egl.c          | 36 ++++++++++++++++++-----------
 client/renderers/EGL/texture.c      |  3 ++-
 3 files changed, 26 insertions(+), 14 deletions(-)

diff --git a/client/renderers/EGL/CMakeLists.txt b/client/renderers/EGL/CMakeLists.txt
index bc32619a..3a3c443b 100644
--- a/client/renderers/EGL/CMakeLists.txt
+++ b/client/renderers/EGL/CMakeLists.txt
@@ -33,6 +33,7 @@ make_object(
 
 add_library(renderer_EGL STATIC
 	egl.c
+	dynprocs.c
 	debug.c
 	shader.c
 	texture.c
diff --git a/client/renderers/EGL/egl.c b/client/renderers/EGL/egl.c
index 543acfc3..d5d30549 100644
--- a/client/renderers/EGL/egl.c
+++ b/client/renderers/EGL/egl.c
@@ -37,6 +37,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 #include <assert.h>
 
 #include "app.h"
+#include "dynprocs.h"
 #include "model.h"
 #include "shader.h"
 #include "desktop.h"
@@ -629,6 +630,8 @@ bool egl_render_startup(void * opaque, SDL_Window * window)
   const char *client_exts = eglQueryString(this->display, EGL_EXTENSIONS);
   const char *vendor      = (const char *)glGetString(GL_VENDOR);
 
+  egl_DynProcsInit();
+
   DEBUG_INFO("EGL       : %d.%d", maj, min);
   DEBUG_INFO("Vendor    : %s", vendor);
   DEBUG_INFO("Renderer  : %s", glGetString(GL_RENDERER));
@@ -636,20 +639,27 @@ bool egl_render_startup(void * opaque, SDL_Window * window)
   DEBUG_INFO("EGL APIs  : %s", eglQueryString(this->display, EGL_CLIENT_APIS));
   DEBUG_INFO("Extensions: %s", client_exts);
 
-  if (strstr(client_exts, "EGL_EXT_image_dma_buf_import") != NULL)
+  if (g_dynprocs.glEGLImageTargetTexture2DOES)
   {
-    /*
-     * As of version 455.45.01 NVidia started advertising support for this
-     * feature, however even on the latest version 460.27.04 this is still
-     * broken and does not work, until this is fixed and we have way to detect
-     * this early just disable dma for all NVIDIA devices.
-     *
-     * ref: https://forums.developer.nvidia.com/t/egl-ext-image-dma-buf-import-broken-egl-bad-alloc-with-tons-of-free-ram/165552
-     */
-    if (strstr(vendor, "NVIDIA") != NULL)
-      DEBUG_WARN("NVIDIA driver detected, ignoring broken DMA support");
-    else
-      this->dmaSupport = true;
+    if (strstr(client_exts, "EGL_EXT_image_dma_buf_import") != NULL)
+    {
+      /*
+       * As of version 455.45.01 NVidia started advertising support for this
+       * feature, however even on the latest version 460.27.04 this is still
+       * broken and does not work, until this is fixed and we have way to detect
+       * this early just disable dma for all NVIDIA devices.
+       *
+       * ref: https://forums.developer.nvidia.com/t/egl-ext-image-dma-buf-import-broken-egl-bad-alloc-with-tons-of-free-ram/165552
+       */
+      if (strstr(vendor, "NVIDIA") != NULL)
+        DEBUG_WARN("NVIDIA driver detected, ignoring broken DMA support");
+      else
+        this->dmaSupport = true;
+    }
+  }
+  else
+  {
+    DEBUG_INFO("glEGLImageTargetTexture2DOES unavilable, DMA support disabled");
   }
 
   eglSwapInterval(this->display, this->opt.vsync ? 1 : 0);
diff --git a/client/renderers/EGL/texture.c b/client/renderers/EGL/texture.c
index 17df4cdd..64ce5adb 100644
--- a/client/renderers/EGL/texture.c
+++ b/client/renderers/EGL/texture.c
@@ -21,6 +21,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 #include "common/debug.h"
 #include "common/framebuffer.h"
 #include "debug.h"
+#include "dynprocs.h"
 #include "utils.h"
 
 #include <stdlib.h>
@@ -392,7 +393,7 @@ bool egl_texture_update_from_dma(EGL_Texture * texture, const FrameBuffer * fram
 
   /* bind the texture and initiate the transfer */
   glBindTexture(GL_TEXTURE_2D, texture->tex);
-  glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
+  g_dynprocs.glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
 
   /* wait for completion */
   framebuffer_wait(frame, texture->height * texture->stride);