From 0077982fb78a8ed39a90da03c0898d12583fed64 Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Sun, 18 Apr 2021 16:07:13 +0200
Subject: [PATCH] GLES fixes (#11205)

* Consistently set float precision for GLES

* Enable DPI scaling on Windows+GLES
---
 src/client/renderingengine.cpp |  4 ++++
 src/client/shader.cpp          | 12 +++++++-----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/client/renderingengine.cpp b/src/client/renderingengine.cpp
index 4f59bbae3..d2d136a61 100644
--- a/src/client/renderingengine.cpp
+++ b/src/client/renderingengine.cpp
@@ -335,6 +335,10 @@ static bool getWindowHandle(irr::video::IVideoDriver *driver, HWND &hWnd)
 	case video::EDT_DIRECT3D9:
 		hWnd = reinterpret_cast<HWND>(exposedData.D3D9.HWnd);
 		break;
+#if ENABLE_GLES
+	case video::EDT_OGLES1:
+	case video::EDT_OGLES2:
+#endif
 	case video::EDT_OPENGL:
 		hWnd = reinterpret_cast<HWND>(exposedData.OpenGLWin32.HWnd);
 		break;
diff --git a/src/client/shader.cpp b/src/client/shader.cpp
index b3e4911f4..58946b90f 100644
--- a/src/client/shader.cpp
+++ b/src/client/shader.cpp
@@ -579,8 +579,10 @@ ShaderInfo ShaderSource::generateShader(const std::string &name,
 	if (use_gles) {
 		shaders_header << R"(
 			#version 100
-			)";
+		)";
 		vertex_header = R"(
+			precision mediump float;
+
 			uniform highp mat4 mWorldView;
 			uniform highp mat4 mWorldViewProj;
 			uniform mediump mat4 mTexture;
@@ -592,17 +594,17 @@ ShaderInfo ShaderSource::generateShader(const std::string &name,
 			attribute mediump vec3 inVertexNormal;
 			attribute mediump vec4 inVertexTangent;
 			attribute mediump vec4 inVertexBinormal;
-			)";
+		)";
 		fragment_header = R"(
 			precision mediump float;
-			)";
+		)";
 	} else {
 		shaders_header << R"(
 			#version 120
 			#define lowp
 			#define mediump
 			#define highp
-			)";
+		)";
 		vertex_header = R"(
 			#define mWorldView gl_ModelViewMatrix
 			#define mWorldViewProj gl_ModelViewProjectionMatrix
@@ -615,7 +617,7 @@ ShaderInfo ShaderSource::generateShader(const std::string &name,
 			#define inVertexNormal gl_Normal
 			#define inVertexTangent gl_MultiTexCoord1
 			#define inVertexBinormal gl_MultiTexCoord2
-			)";
+		)";
 	}
 
 	bool use_discard = use_gles;