diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d8250ae6..04995314 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -126,7 +126,7 @@ if (ENABLE_OGLRENDERER)
     elseif (APPLE)
         target_link_libraries(core ${EPOXY_LIBRARIES})
     else()
-        target_link_libraries(core rt ${EPOXY_LIBRARIES})
+        target_link_libraries(core rt GLESv2)
     endif()
 else()
 	if (WIN32)
diff --git a/src/GPU3D_OpenGL.cpp b/src/GPU3D_OpenGL.cpp
index ccac08a8..36fe6246 100644
--- a/src/GPU3D_OpenGL.cpp
+++ b/src/GPU3D_OpenGL.cpp
@@ -62,8 +62,8 @@ bool GLRenderer::BuildRenderShader(u32 flags, const char* vs, const char* fs)
     glBindAttribLocation(prog, 1, "vColor");
     glBindAttribLocation(prog, 2, "vTexcoord");
     glBindAttribLocation(prog, 3, "vPolygonAttr");
-    glBindFragDataLocation(prog, 0, "oColor");
-    glBindFragDataLocation(prog, 1, "oAttr");
+    //glBindFragDataLocation(prog, 0, "oColor");
+    //glBindFragDataLocation(prog, 1, "oAttr");
 
     if (!OpenGL::LinkShaderProgram(RenderShader[flags]))
         return false;
@@ -109,16 +109,16 @@ bool GLRenderer::Init()
     glEnable(GL_DEPTH_TEST);
     glEnable(GL_STENCIL_TEST);
 
-    glDepthRange(0, 1);
-    glClearDepth(1.0);
+    glDepthRangef(0.0, 1.0);
+    glClearDepthf(1.0);
 
 
     if (!OpenGL::BuildShaderProgram(kClearVS, kClearFS, ClearShaderPlain, "ClearShader"))
         return false;
 
     glBindAttribLocation(ClearShaderPlain[2], 0, "vPosition");
-    glBindFragDataLocation(ClearShaderPlain[2], 0, "oColor");
-    glBindFragDataLocation(ClearShaderPlain[2], 1, "oAttr");
+    //glBindFragDataLocation(ClearShaderPlain[2], 0, "oColor");
+    //glBindFragDataLocation(ClearShaderPlain[2], 1, "oAttr");
 
     if (!OpenGL::LinkShaderProgram(ClearShaderPlain))
         return false;
@@ -154,7 +154,7 @@ bool GLRenderer::Init()
         return false;
 
     glBindAttribLocation(FinalPassEdgeShader[2], 0, "vPosition");
-    glBindFragDataLocation(FinalPassEdgeShader[2], 0, "oColor");
+    //glBindFragDataLocation(FinalPassEdgeShader[2], 0, "oColor");
 
     if (!OpenGL::LinkShaderProgram(FinalPassEdgeShader))
         return false;
@@ -170,7 +170,7 @@ bool GLRenderer::Init()
     glUniform1i(uni_id, 1);
 
     glBindAttribLocation(FinalPassFogShader[2], 0, "vPosition");
-    glBindFragDataLocation(FinalPassFogShader[2], 0, "oColor");
+    //glBindFragDataLocation(FinalPassFogShader[2], 0, "oColor");
 
     if (!OpenGL::LinkShaderProgram(FinalPassFogShader))
         return false;
@@ -281,7 +281,7 @@ bool GLRenderer::Init()
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB5_A1, 1024, 48, 0, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, NULL);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB5_A1, 1024, 48, 0, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, NULL);
 
     glBindFramebuffer(GL_FRAMEBUFFER, 0);
 
@@ -1170,7 +1170,7 @@ void GLRenderer::RenderFrame()
     ShaderConfig.uFogShift = RenderFogShift;
 
     glBindBuffer(GL_UNIFORM_BUFFER, ShaderConfigUBO);
-    void* unibuf = glMapBuffer(GL_UNIFORM_BUFFER, GL_WRITE_ONLY);
+    void* unibuf = glMapBufferRange(GL_UNIFORM_BUFFER, 0, GL_BUFFER_SIZE, GL_WRITE_ONLY);
     if (unibuf) memcpy(unibuf, &ShaderConfig, sizeof(ShaderConfig));
     glUnmapBuffer(GL_UNIFORM_BUFFER);
 
@@ -1203,7 +1203,7 @@ void GLRenderer::RenderFrame()
         else if (mask & (1<<5)) vram = GPU::VRAM_F;
         else if (mask & (1<<6)) vram = GPU::VRAM_G;
 
-        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, i*8, 1024, 8, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, vram);
+        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, i*8, 1024, 8, GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, vram);
     }
 
     glDisable(GL_SCISSOR_TEST);
@@ -1295,11 +1295,12 @@ void GLRenderer::PrepareCaptureFrame()
     glBindFramebuffer(GL_READ_FRAMEBUFFER, FramebufferID[original_fb]);
     glReadBuffer(GL_COLOR_ATTACHMENT0);
     glBindFramebuffer(GL_DRAW_FRAMEBUFFER, FramebufferID[3]);
-    glDrawBuffer(GL_COLOR_ATTACHMENT0);
+    GLenum drawBuffer[] = {GL_COLOR_ATTACHMENT0};
+    glDrawBuffers(1, drawBuffer);
     glBlitFramebuffer(0, 0, ScreenW, ScreenH, 0, 0, 256, 192, GL_COLOR_BUFFER_BIT, GL_NEAREST);
 
     glBindFramebuffer(GL_READ_FRAMEBUFFER, FramebufferID[3]);
-    glReadPixels(0, 0, 256, 192, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
+    glReadPixels(0, 0, 256, 192, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
 }
 
 u32* GLRenderer::GetLine(int line)
@@ -1308,7 +1309,7 @@ u32* GLRenderer::GetLine(int line)
 
     if (line == 0)
     {
-        u8* data = (u8*)glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
+        u8* data = (u8*)glMapBufferRange(GL_PIXEL_PACK_BUFFER, 0, GL_BUFFER_SIZE, GL_READ_ONLY);
         if (data) memcpy(&Framebuffer[stride*0], data, 4*stride*192);
         glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
     }
diff --git a/src/GPU3D_OpenGL_shaders.h b/src/GPU3D_OpenGL_shaders.h
index db15df31..894a1615 100644
--- a/src/GPU3D_OpenGL_shaders.h
+++ b/src/GPU3D_OpenGL_shaders.h
@@ -19,7 +19,7 @@
 #ifndef GPU3D_OPENGL_SHADERS_H
 #define GPU3D_OPENGL_SHADERS_H
 
-#define kShaderHeader "#version 140"
+#define kShaderHeader "#version 300 es\nprecision mediump float;"
 
 
 const char* kClearVS = kShaderHeader R"(
@@ -41,16 +41,16 @@ uniform uvec4 uColor;
 uniform uint uOpaquePolyID;
 uniform uint uFogFlag;
 
-out vec4 oColor;
-out vec4 oAttr;
+layout (location = 0) out vec4 oColor;
+layout (location = 1) out vec4 oAttr;
 
 void main()
 {
     oColor = vec4(uColor).bgra / 31.0;
     oAttr.r = float(uOpaquePolyID) / 63.0;
-    oAttr.g = 0;
+    oAttr.g = 0.0;
     oAttr.b = float(uFogFlag);
-    oAttr.a = 1;
+    oAttr.a = 1.0;
 }
 )";
 
@@ -84,7 +84,7 @@ layout(std140) uniform uConfig
     int uFogShift;
 };
 
-out vec4 oColor;
+layout (location = 0) out vec4 oColor;
 
 // make up for crapo zbuffer precision
 bool isless(float a, float b)
@@ -117,7 +117,7 @@ void main()
 
     int polyid = int(attr.r * 63.0);
 
-    if (attr.g != 0)
+    if (attr.g != 0.0)
     {
         vec4 depthU = texelFetch(DepthBuffer, coord + ivec2(0,-scale), 0);
         vec4 attrU = texelFetch(AttrBuffer, coord + ivec2(0,-scale), 0);
@@ -141,7 +141,7 @@ void main()
             if ((uDispCnt & (1<<4)) != 0)
                 ret.a = 0.5;
             else
-                ret.a = 1;
+                ret.a = 1.0;
         }
     }
 
@@ -166,7 +166,7 @@ layout(std140) uniform uConfig
     int uFogShift;
 };
 
-out vec4 oColor;
+layout (location = 0) out vec4 oColor;
 
 vec4 CalculateFog(float depth)
 {
@@ -207,7 +207,7 @@ void main()
     vec4 depth = texelFetch(DepthBuffer, coord, 0);
     vec4 attr = texelFetch(AttrBuffer, coord, 0);
 
-    if (attr.b != 0) ret = CalculateFog(depth.r);
+    if (attr.b != 0.0) ret = CalculateFog(depth.r);
 
     oColor = ret;
 }
@@ -241,7 +241,7 @@ flat out ivec3 fPolygonAttr;
 
 const char* kRenderFSCommon = R"(
 
-uniform usampler2D TexMem;
+uniform mediump usampler2D TexMem;
 uniform sampler2D TexPalMem;
 
 layout(std140) uniform uConfig
@@ -260,8 +260,8 @@ smooth in vec4 fColor;
 smooth in vec2 fTexcoord;
 flat in ivec3 fPolygonAttr;
 
-out vec4 oColor;
-out vec4 oAttr;
+layout (location = 0) out vec4 oColor;
+layout (location = 2) out vec4 oAttr;
 
 int TexcoordWrap(int c, int maxc, int mode)
 {
@@ -307,7 +307,7 @@ vec4 TextureFetch_I2(ivec2 addr, ivec4 st, int wrapmode, float alpha0)
     addr.y = (addr.y << 2) + pixel.r;
     vec4 color = texelFetch(TexPalMem, ivec2(addr.y&0x3FF, addr.y>>10), 0);
 
-    return vec4(color.rgb, (pixel.r>0)?1:alpha0);
+    return vec4(color.rgb, (pixel.r>0)?1.0:alpha0);
 }
 
 vec4 TextureFetch_I4(ivec2 addr, ivec4 st, int wrapmode, float alpha0)
@@ -323,7 +323,7 @@ vec4 TextureFetch_I4(ivec2 addr, ivec4 st, int wrapmode, float alpha0)
     addr.y = (addr.y << 3) + pixel.r;
     vec4 color = texelFetch(TexPalMem, ivec2(addr.y&0x3FF, addr.y>>10), 0);
 
-    return vec4(color.rgb, (pixel.r>0)?1:alpha0);
+    return vec4(color.rgb, (pixel.r>0)?1.0:alpha0);
 }
 
 vec4 TextureFetch_I8(ivec2 addr, ivec4 st, int wrapmode, float alpha0)
@@ -337,7 +337,7 @@ vec4 TextureFetch_I8(ivec2 addr, ivec4 st, int wrapmode, float alpha0)
     addr.y = (addr.y << 3) + pixel.r;
     vec4 color = texelFetch(TexPalMem, ivec2(addr.y&0x3FF, addr.y>>10), 0);
 
-    return vec4(color.rgb, (pixel.r>0)?1:alpha0);
+    return vec4(color.rgb, (pixel.r>0)?1.0:alpha0);
 }
 
 vec4 TextureFetch_Compressed(ivec2 addr, ivec4 st, int wrapmode)
@@ -601,7 +601,7 @@ vec4 FinalColor()
         if ((uDispCnt & (1<<1)) == 0)
         {
             // toon
-            vec3 tooncolor = uToonColors[int(vcol.r * 31)].rgb;
+            vec3 tooncolor = uToonColors[int(vcol.r * 31.0)].rgb;
             vcol.rgb = tooncolor;
         }
         else
@@ -638,7 +638,7 @@ vec4 FinalColor()
     {
         if ((uDispCnt & (1<<1)) != 0)
         {
-            vec3 tooncolor = uToonColors[int(vcol.r * 31)].rgb;
+            vec3 tooncolor = uToonColors[int(vcol.r * 31.0)].rgb;
             col.rgb = min(col.rgb + tooncolor, 1.0);
         }
     }
@@ -698,13 +698,13 @@ const char* kRenderFS_ZO = R"(
 void main()
 {
     vec4 col = FinalColor();
-    if (col.a < 30.5/31) discard;
+    if (col.a < 30.5/31.0) discard;
 
     oColor = col;
     oAttr.r = float((fPolygonAttr.x >> 24) & 0x3F) / 63.0;
-    oAttr.g = 0;
+    oAttr.g = 0.0;
     oAttr.b = float((fPolygonAttr.x >> 15) & 0x1);
-    oAttr.a = 1;
+    oAttr.a = 1.0;
 }
 )";
 
@@ -715,13 +715,13 @@ smooth in float fZ;
 void main()
 {
     vec4 col = FinalColor();
-    if (col.a < 30.5/31) discard;
+    if (col.a < 30.5/31.0) discard;
 
     oColor = col;
     oAttr.r = float((fPolygonAttr.x >> 24) & 0x3F) / 63.0;
-    oAttr.g = 0;
+    oAttr.g = 0.0;
     oAttr.b = float((fPolygonAttr.x >> 15) & 0x1);
-    oAttr.a = 1;
+    oAttr.a = 1.0;
     gl_FragDepth = fZ;
 }
 )";
@@ -731,10 +731,10 @@ const char* kRenderFS_ZE = R"(
 void main()
 {
     vec4 col = FinalColor();
-    if (col.a < 30.5/31) discard;
+    if (col.a < 30.5/31.0) discard;
 
-    oAttr.g = 1;
-    oAttr.a = 1;
+    oAttr.g = 1.0;
+    oAttr.a = 1.0;
 }
 )";
 
@@ -745,10 +745,10 @@ smooth in float fZ;
 void main()
 {
     vec4 col = FinalColor();
-    if (col.a < 30.5/31) discard;
+    if (col.a < 30.5/31.0) discard;
 
-    oAttr.g = 1;
-    oAttr.a = 1;
+    oAttr.g = 1.0;
+    oAttr.a = 1.0;
     gl_FragDepth = fZ;
 }
 )";
@@ -758,12 +758,12 @@ const char* kRenderFS_ZT = R"(
 void main()
 {
     vec4 col = FinalColor();
-    if (col.a < 0.5/31) discard;
-    if (col.a >= 30.5/31) discard;
+    if (col.a < 0.5/31.0) discard;
+    if (col.a >= 30.5/31.0) discard;
 
     oColor = col;
-    oAttr.b = 0;
-    oAttr.a = 1;
+    oAttr.b = 0.0;
+    oAttr.a = 1.0;
 }
 )";
 
@@ -774,12 +774,12 @@ smooth in float fZ;
 void main()
 {
     vec4 col = FinalColor();
-    if (col.a < 0.5/31) discard;
-    if (col.a >= 30.5/31) discard;
+    if (col.a < 0.5/31.0) discard;
+    if (col.a >= 30.5/31.0) discard;
 
     oColor = col;
-    oAttr.b = 0;
-    oAttr.a = 1;
+    oAttr.b = 0.0;
+    oAttr.a = 1.0;
     gl_FragDepth = fZ;
 }
 )";
diff --git a/src/GPU_OpenGL.cpp b/src/GPU_OpenGL.cpp
index 350012fd..81532638 100644
--- a/src/GPU_OpenGL.cpp
+++ b/src/GPU_OpenGL.cpp
@@ -45,7 +45,7 @@ bool GLCompositor::Init()
 
         glBindAttribLocation(CompShader[i][2], 0, "vPosition");
         glBindAttribLocation(CompShader[i][2], 1, "vTexcoord");
-        glBindFragDataLocation(CompShader[i][2], 0, "oColor");
+        //glBindFragDataLocation(CompShader[i][2], 0, "oColor");
 
         if (!OpenGL::LinkShaderProgram(CompShader[i]))
             return false;
diff --git a/src/GPU_OpenGL_shaders.h b/src/GPU_OpenGL_shaders.h
index ba3b4bd9..5e7641fb 100644
--- a/src/GPU_OpenGL_shaders.h
+++ b/src/GPU_OpenGL_shaders.h
@@ -19,7 +19,9 @@
 #ifndef GPU_OPENGL_SHADERS_H
 #define GPU_OPENGL_SHADERS_H
 
-const char* kCompositorVS = R"(#version 140
+#define kShaderHeader "#version 300 es\nprecision mediump float;"
+
+const char* kCompositorVS = kShaderHeader R"(
 
 in vec2 vPosition;
 in vec2 vTexcoord;
@@ -38,17 +40,17 @@ void main()
 }
 )";
 
-const char* kCompositorFS_Nearest = R"(#version 140
+const char* kCompositorFS_Nearest = kShaderHeader R"(
 
 uniform uint u3DScale;
 uniform int u3DXPos;
 
-uniform usampler2D ScreenTex;
+uniform mediump usampler2D ScreenTex;
 uniform sampler2D _3DTex;
 
 smooth in vec2 fTexcoord;
 
-out vec4 oColor;
+layout (location = 0) out vec4 oColor;
 
 void main()
 {
@@ -73,8 +75,8 @@ void main()
             // 3D on top, blending
 
             float xpos = fTexcoord.x + _3dxpos;
-            float ypos = mod(fTexcoord.y, 192);
-            ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(vec2(xpos, ypos)*u3DScale), 0).bgra
+            float ypos = mod(fTexcoord.y, 192.0);
+            ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(int(xpos)*int(u3DScale), int(ypos)*int(u3DScale)), 0).bgra
                          * vec4(63,63,63,31));
 
             if (_3dpix.a > 0)
@@ -94,8 +96,8 @@ void main()
             // 3D on bottom, blending
 
             float xpos = fTexcoord.x + _3dxpos;
-            float ypos = mod(fTexcoord.y, 192);
-            ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(vec2(xpos, ypos)*u3DScale), 0).bgra
+            float ypos = mod(fTexcoord.y, 192.0);
+            ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(int(xpos)*int(u3DScale), int(ypos)*int(u3DScale)), 0).bgra
                          * vec4(63,63,63,31));
 
             if (_3dpix.a > 0)
@@ -114,8 +116,8 @@ void main()
             // 3D on top, normal/fade
 
             float xpos = fTexcoord.x + _3dxpos;
-            float ypos = mod(fTexcoord.y, 192);
-            ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(vec2(xpos, ypos)*u3DScale), 0).bgra
+            float ypos = mod(fTexcoord.y, 192.0);
+            ivec4 _3dpix = ivec4(texelFetch(_3DTex, ivec2(int(xpos)*int(u3DScale), int(ypos)*int(u3DScale)), 0).bgra
                          * vec4(63,63,63,31));
 
             if (_3dpix.a > 0)
@@ -165,7 +167,7 @@ void main()
 
 
 
-const char* kCompositorFS_Linear = R"(#version 140
+const char* kCompositorFS_Linear = kShaderHeader R"(
 
 uniform uint u3DScale;
 
@@ -325,7 +327,7 @@ void main()
 
 // HUGE TEST ZONE ARRLGD
 
-const char* kCompositorVS_xBRZ = R"(#version 140
+const char* kCompositorVS_xBRZ = kShaderHeader R"(
 
 #define BLEND_NONE 0
 #define BLEND_NORMAL 1
@@ -406,7 +408,7 @@ void main()
 }
 )";
 
-const char* kCompositorFS_xBRZ = R"(#version 140
+const char* kCompositorFS_xBRZ = kShaderHeader R"(
 
 #define BLEND_NONE 0
 #define BLEND_NORMAL 1
diff --git a/src/OpenGLSupport.h b/src/OpenGLSupport.h
index cbbb34e1..bc62bf0f 100644
--- a/src/OpenGLSupport.h
+++ b/src/OpenGLSupport.h
@@ -22,7 +22,7 @@
 #include <stdio.h>
 #include <string.h>
 
-#include <epoxy/gl.h>
+#include <GLES3/gl32.h>
 
 
 #include "Platform.h"
diff --git a/src/frontend/qt_sdl/OSD.cpp b/src/frontend/qt_sdl/OSD.cpp
index bc3cd916..9a3b527c 100644
--- a/src/frontend/qt_sdl/OSD.cpp
+++ b/src/frontend/qt_sdl/OSD.cpp
@@ -66,7 +66,7 @@ GLuint OSDVertexBuffer;
 volatile bool Rendering;
 
 
-bool Init(QOpenGLFunctions_3_2_Core* f)
+bool Init(QOpenGLExtraFunctions* f)
 {
     if (f)
     {
@@ -76,7 +76,6 @@ bool Init(QOpenGLFunctions_3_2_Core* f)
 
         GLuint pid = Shader->programId();
         f->glBindAttribLocation(pid, 0, "vPosition");
-        f->glBindFragDataLocation(pid, 0, "oColor");
 
         Shader->link();
 
@@ -112,7 +111,7 @@ bool Init(QOpenGLFunctions_3_2_Core* f)
     return true;
 }
 
-void DeInit(QOpenGLFunctions_3_2_Core* f)
+void DeInit(QOpenGLExtraFunctions* f)
 {
     for (auto it = ItemQueue.begin(); it != ItemQueue.end(); )
     {
@@ -344,7 +343,7 @@ void AddMessage(u32 color, const char* text)
     ItemQueue.push_back(item);
 }
 
-void Update(QOpenGLFunctions_3_2_Core* f)
+void Update(QOpenGLExtraFunctions* f)
 {
     if (!Config::ShowOSD)
     {
@@ -420,7 +419,7 @@ void DrawNative(QPainter& painter)
     Rendering = false;
 }
 
-void DrawGL(QOpenGLFunctions_3_2_Core* f, float w, float h)
+void DrawGL(QOpenGLExtraFunctions* f, float w, float h)
 {
     if (!Config::ShowOSD) return;
     if (!mainWindow || !mainWindow->panel) return;
diff --git a/src/frontend/qt_sdl/OSD.h b/src/frontend/qt_sdl/OSD.h
index 8fbfc7bd..c89f504b 100644
--- a/src/frontend/qt_sdl/OSD.h
+++ b/src/frontend/qt_sdl/OSD.h
@@ -22,14 +22,14 @@
 namespace OSD
 {
 
-bool Init(QOpenGLFunctions_3_2_Core* f);
-void DeInit(QOpenGLFunctions_3_2_Core* f);
+bool Init(QOpenGLExtraFunctions* f);
+void DeInit(QOpenGLExtraFunctions* f);
 
 void AddMessage(u32 color, const char* text);
 
-void Update(QOpenGLFunctions_3_2_Core* f);
+void Update(QOpenGLExtraFunctions* f);
 void DrawNative(QPainter& painter);
-void DrawGL(QOpenGLFunctions_3_2_Core* f, float w, float h);
+void DrawGL(QOpenGLExtraFunctions* f, float w, float h);
 
 }
 
diff --git a/src/frontend/qt_sdl/OSD_shaders.h b/src/frontend/qt_sdl/OSD_shaders.h
index 3ff51a90..5c62fdfb 100644
--- a/src/frontend/qt_sdl/OSD_shaders.h
+++ b/src/frontend/qt_sdl/OSD_shaders.h
@@ -19,7 +19,9 @@
 #ifndef OSD_SHADERS_H
 #define OSD_SHADERS_H
 
-const char* kScreenVS_OSD = R"(#version 140
+#define kShaderHeader "#version 300 es\nprecision mediump float;"
+
+const char* kScreenVS_OSD = kShaderHeader R"(
 
 uniform vec2 uScreenSize;
 
@@ -37,10 +39,10 @@ void main()
 
     vec2 osdpos = (vPosition * vec2(uOSDSize * uScaleFactor));
     fTexcoord = osdpos;
-    osdpos += uOSDPos;
+    osdpos += vec2(uOSDPos);
 
     fpos.xy = ((osdpos * 2.0) / uScreenSize * uScaleFactor) - 1.0;
-    fpos.y *= -1;
+    fpos.y *= -1.0;
     fpos.z = 0.0;
     fpos.w = 1.0;
 
@@ -48,13 +50,13 @@ void main()
 }
 )";
 
-const char* kScreenFS_OSD = R"(#version 140
+const char* kScreenFS_OSD = kShaderHeader R"(
 
 uniform sampler2D OSDTex;
 
 smooth in vec2 fTexcoord;
 
-out vec4 oColor;
+layout (location = 0) out vec4 oColor;
 
 void main()
 {
diff --git a/src/frontend/qt_sdl/main.cpp b/src/frontend/qt_sdl/main.cpp
index fb1caea5..d2cbc55f 100644
--- a/src/frontend/qt_sdl/main.cpp
+++ b/src/frontend/qt_sdl/main.cpp
@@ -1064,7 +1064,6 @@ void ScreenPanelGL::initializeGL()
     GLuint pid = screenShader->programId();
     glBindAttribLocation(pid, 0, "vPosition");
     glBindAttribLocation(pid, 1, "vTexcoord");
-    glBindFragDataLocation(pid, 0, "oColor");
 
     screenShader->link();
 
diff --git a/src/frontend/qt_sdl/main.h b/src/frontend/qt_sdl/main.h
index 0f9034fe..535c55d1 100644
--- a/src/frontend/qt_sdl/main.h
+++ b/src/frontend/qt_sdl/main.h
@@ -33,7 +33,7 @@
 #include <QOpenGLWidget>
 #include <QOpenGLContext>
 #include <QOpenGLFunctions>
-#include <QOpenGLFunctions_3_2_Core>
+#include <QOpenGLExtraFunctions>
 #include <QOpenGLShaderProgram>
 
 #include "FrontendUtil.h"
@@ -156,7 +156,7 @@ private:
 };
 
 
-class ScreenPanelGL : public QOpenGLWidget, public ScreenHandler, protected QOpenGLFunctions_3_2_Core
+class ScreenPanelGL : public QOpenGLWidget, public ScreenHandler, protected QOpenGLExtraFunctions
 {
     Q_OBJECT
 
diff --git a/src/frontend/qt_sdl/main_shaders.h b/src/frontend/qt_sdl/main_shaders.h
index 0aa99ad2..23f42af6 100644
--- a/src/frontend/qt_sdl/main_shaders.h
+++ b/src/frontend/qt_sdl/main_shaders.h
@@ -19,7 +19,9 @@
 #ifndef MAIN_SHADERS_H
 #define MAIN_SHADERS_H
 
-const char* kScreenVS = R"(#version 140
+#define kShaderHeader "#version 300 es\nprecision mediump float;"
+
+const char* kScreenVS = kShaderHeader R"(
 
 uniform vec2 uScreenSize;
 uniform mat2x3 uTransform;
@@ -37,7 +39,7 @@ void main()
     fpos.xy = vec3(vPosition, 1.0) * uTransform * uScaleFactor;
 
     fpos.xy = ((fpos.xy * 2.0) / (uScreenSize * uScaleFactor)) - 1.0;
-    fpos.y *= -1;
+    fpos.y *= -1.0;
     fpos.z = 0.0;
     fpos.w = 1.0;
 
@@ -46,13 +48,13 @@ void main()
 }
 )";
 
-const char* kScreenFS = R"(#version 140
+const char* kScreenFS = kShaderHeader R"(
 
 uniform sampler2D ScreenTex;
 
 smooth in vec2 fTexcoord;
 
-out vec4 oColor;
+layout (location = 0) out vec4 oColor;
 
 void main()
 {