Fix T71576 Mesh error on mutimaterial Meshes on legacy nvidia drivers

Differential Revision: https://developer.blender.org/D6351

source/blender/draw/intern/shaders/common_view_lib.glsl

@@ -80,7 +80,7 @@ uniform int baseInstance;
 #  if defined(IN_PLACE_INSTANCES) || defined(INSTANCED_ATTRIB)
 /* When drawing instances of an object at the same position. */
 #    define instanceId 0
-#  elif defined(GPU_DEPRECATED_AMD_DRIVER)
+#  elif defined(GPU_DEPRECATED_AMD)
 /* A driver bug make it so that when using an attribute with GL_INT_2_10_10_10_REV as format,
  * the gl_InstanceID is incremented by the 2 bit component of the attrib.
  * Ignore gl_InstanceID then. */
@@ -115,8 +115,11 @@ flat in int resourceIDFrag;
 #  define resource_id resourceIDFrag
 #endif
 
-#if !defined(GPU_INTEL) && !defined(GPU_DEPRECATED_AMD_DRIVER) && !defined(OS_MAC) && \
-    !defined(INSTANCED_ATTRIB)
+#if !defined(GPU_INTEL) && !defined(GPU_DEPRECATED_AMD) && !defined(GPU_DEPRECATED_NVIDIA)
+#  define USE_INDEXED_MODELMAT
+#endif
+
+#if defined(USE_INDEXED_MODELMAT) && !defined(OS_MAC) && !defined(INSTANCED_ATTRIB)
 struct ObjectMatrices {
   mat4 drw_modelMatrix;
   mat4 drw_modelMatrixInverse;

source/blender/gpu/GPU_extensions.h

@@ -48,6 +48,7 @@ bool GPU_mip_render_workaround(void);
 bool GPU_depth_blitting_workaround(void);
 bool GPU_unused_fb_slot_workaround(void);
 bool GPU_context_local_shaders_workaround(void);
+bool GPU_legacy_nvidia_driver(void);
 bool GPU_crappy_amd_driver(void);
 
 bool GPU_mem_stats_supported(void);

source/blender/gpu/intern/gpu_extensions.c

@@ -93,6 +93,8 @@ static struct GPUGlobal {
   /* Some crappy Intel drivers don't work well with shaders created in different
    * rendering contexts. */
   bool context_local_shaders_workaround;
+  /* Unmaintained NVIDIA drivers contain certain bugs we need to workaround. */
+  bool legacy_nvidia_driver;
 } GG = {1, 0};
 
 static void gpu_detect_mip_render_workaround(void)
@@ -216,6 +218,11 @@ bool GPU_context_local_shaders_workaround(void)
   return GG.context_local_shaders_workaround;
 }
 
+bool GPU_legacy_nvidia_driver(void)
+{
+  return GG.legacy_nvidia_driver;
+}
+
 bool GPU_crappy_amd_driver(void)
 {
   /* Currently are the same drivers with the `unused_fb_slot` problem. */
@@ -281,6 +288,14 @@ void gpu_extensions_init(void)
   GG.glew_arb_base_instance_is_supported = GLEW_ARB_base_instance;
   gpu_detect_mip_render_workaround();
 
+  if (GPU_type_matches(GPU_DEVICE_NVIDIA, GPU_OS_ANY, GPU_DRIVER_OFFICIAL)) {
+    char *driver_version_str = strstr(version, "NVIDIA ") + 7;
+    int driver_major_version = (int)strtol(driver_version_str, NULL, 10);
+    if (driver_major_version > 0 && driver_major_version < 400) {
+      GG.legacy_nvidia_driver = true;
+    }
+  }
+
   if (G.debug & G_DEBUG_GPU_FORCE_WORKAROUNDS) {
     printf("\n");
     printf("GPU: Bypassing workaround detection.\n");

source/blender/gpu/intern/gpu_shader.c

@@ -243,11 +243,14 @@ static void gpu_shader_standard_defines(char defines[MAX_DEFINE_LENGTH])
   if (GPU_type_matches(GPU_DEVICE_ATI, GPU_OS_ANY, GPU_DRIVER_ANY)) {
     strcat(defines, "#define GPU_ATI\n");
     if (GPU_crappy_amd_driver()) {
-      strcat(defines, "#define GPU_DEPRECATED_AMD_DRIVER\n");
+      strcat(defines, "#define GPU_DEPRECATED_AMD\n");
     }
   }
   else if (GPU_type_matches(GPU_DEVICE_NVIDIA, GPU_OS_ANY, GPU_DRIVER_ANY)) {
     strcat(defines, "#define GPU_NVIDIA\n");
+    if (GPU_legacy_nvidia_driver()) {
+      strcat(defines, "#define GPU_DEPRECATED_NVIDIA\n");
+    }
   }
   else if (GPU_type_matches(GPU_DEVICE_INTEL, GPU_OS_ANY, GPU_DRIVER_ANY)) {
     strcat(defines, "#define GPU_INTEL\n");