From 7007ec9e42bf443566846296aa70aba47ee9feb3 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Thu, 16 Jan 2020 01:40:30 +0100
Subject: Issue #1354 - Don't allow glsl[130,400] unless we have gpu_shader5

- Teach GLContext about gpu_shader5
- Downgrade shader language version if gpu_shader5 support isn't found.
---
 gfx/gl/GLContext.cpp         |  3 +++
 gfx/gl/GLContext.h           |  4 ++++
 gfx/gl/GLContextFeatures.cpp | 12 ++++++++++++
 3 files changed, 19 insertions(+)

(limited to 'gfx/gl')

diff --git a/gfx/gl/GLContext.cpp b/gfx/gl/GLContext.cpp
index 33315413f..1515b8627 100644
--- a/gfx/gl/GLContext.cpp
+++ b/gfx/gl/GLContext.cpp
@@ -95,6 +95,7 @@ static const char* const sExtensionNames[] = {
     "GL_ARB_framebuffer_object",
     "GL_ARB_framebuffer_sRGB",
     "GL_ARB_geometry_shader4",
+    "GL_ARB_gpu_shader5",
     "GL_ARB_half_float_pixel",
     "GL_ARB_instanced_arrays",
     "GL_ARB_internalformat_query",
@@ -134,6 +135,7 @@ static const char* const sExtensionNames[] = {
     "GL_EXT_framebuffer_object",
     "GL_EXT_framebuffer_sRGB",
     "GL_EXT_gpu_shader4",
+    "GL_EXT_gpu_shader5",
     "GL_EXT_multisampled_render_to_texture",
     "GL_EXT_occlusion_query_boolean",
     "GL_EXT_packed_depth_stencil",
@@ -160,6 +162,7 @@ static const char* const sExtensionNames[] = {
     "GL_NV_fence",
     "GL_NV_framebuffer_blit",
     "GL_NV_geometry_program4",
+    "GL_NV_gpu_shader5",
     "GL_NV_half_float",
     "GL_NV_instanced_arrays",
     "GL_NV_primitive_restart",
diff --git a/gfx/gl/GLContext.h b/gfx/gl/GLContext.h
index c82efceda..6e3e22207 100644
--- a/gfx/gl/GLContext.h
+++ b/gfx/gl/GLContext.h
@@ -102,6 +102,7 @@ enum class GLFeature {
     get_query_object_iv,
     get_string_indexed,
     gpu_shader4,
+    gpu_shader5,
     instanced_arrays,
     instanced_non_arrays,
     internalformat_query,
@@ -421,6 +422,7 @@ public:
         ARB_framebuffer_object,
         ARB_framebuffer_sRGB,
         ARB_geometry_shader4,
+        ARB_gpu_shader5,
         ARB_half_float_pixel,
         ARB_instanced_arrays,
         ARB_internalformat_query,
@@ -460,6 +462,7 @@ public:
         EXT_framebuffer_object,
         EXT_framebuffer_sRGB,
         EXT_gpu_shader4,
+        EXT_gpu_shader5,
         EXT_multisampled_render_to_texture,
         EXT_occlusion_query_boolean,
         EXT_packed_depth_stencil,
@@ -486,6 +489,7 @@ public:
         NV_fence,
         NV_framebuffer_blit,
         NV_geometry_program4,
+        NV_gpu_shader5,
         NV_half_float,
         NV_instanced_arrays,
         NV_primitive_restart,
diff --git a/gfx/gl/GLContextFeatures.cpp b/gfx/gl/GLContextFeatures.cpp
index 0714d9641..d4f37803f 100644
--- a/gfx/gl/GLContextFeatures.cpp
+++ b/gfx/gl/GLContextFeatures.cpp
@@ -331,6 +331,18 @@ static const FeatureInfo sFeatureInfoArr[] = {
             GLContext::Extensions_End
         }
     },
+    {
+        "gpu_shader5",
+        GLVersion::GL4,
+        GLESVersion::NONE,
+        GLContext::Extension_None,
+        {
+            GLContext::ARB_gpu_shader5,
+            GLContext::EXT_gpu_shader5,
+            GLContext::NV_gpu_shader5,
+            GLContext::Extensions_End
+        }
+    },    
     {
         "instanced_arrays",
         GLVersion::GL3_3,
-- 
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