diff --git a/src/bgfx_shader.sh b/src/bgfx_shader.sh
index f5f791645..5002c0738 100644
--- a/src/bgfx_shader.sh
+++ b/src/bgfx_shader.sh
@@ -242,6 +242,13 @@ vec4 bgfxTexelFetch(BgfxSampler2D _sampler, ivec2 _coord, int _lod)
 	return _sampler.m_texture.Load(ivec3(_coord, _lod) );
 }
 
+vec2 bgfxTextureSize(BgfxSampler2D _sampler, int _lod)
+{
+	vec2 result;
+	_sampler.m_texture.GetDimensions(result.x, result.y);
+	return result;
+}
+
 ivec4 bgfxTexelFetch(BgfxISampler2D _sampler, ivec2 _coord, int _lod)
 {
 	return _sampler.m_texture.Load(ivec3(_coord, _lod) );
@@ -262,6 +269,13 @@ vec4 bgfxTexelFetch(BgfxSampler3D _sampler, ivec3 _coord, int _lod)
 	return _sampler.m_texture.Load(ivec4(_coord, _lod) );
 }
 
+vec3 bgfxTextureSize(BgfxSampler3D _sampler, int _lod)
+{
+	vec3 result;
+	_sampler.m_texture.GetDimensions(result.x, result.y, result.z);
+	return result;
+}
+
 #		define SAMPLER2D(_name, _reg) \
 			uniform SamplerState _name ## Sampler : REGISTER(s, _reg); \
 			uniform Texture2D _name ## Texture : REGISTER(t, _reg); \
@@ -322,6 +336,7 @@ vec4 bgfxTexelFetch(BgfxSampler3D _sampler, ivec3 _coord, int _lod)
 #		define textureCubeLod(_sampler, _coord, _level) bgfxTextureCubeLod(_sampler, _coord, _level)
 
 #		define texelFetch(_sampler, _coord, _lod) bgfxTexelFetch(_sampler, _coord, _lod)
+#		define textureSize(_sampler, _lod) bgfxTextureSize(_sampler, _lod)
 #	else
 
 #		define sampler2DShadow sampler2D
@@ -477,6 +492,24 @@ uvec3 uvec3_splat(uint _x) { return uvec3(_x, _x, _x); }
 uvec4 uvec4_splat(uint _x) { return uvec4(_x, _x, _x, _x); }
 #endif // BGFX_SHADER_LANGUAGE_GLSL >= 130 || BGFX_SHADER_LANGUAGE_HLSL || BGFX_SHADER_LANGUAGE_PSSL || BGFX_SHADER_LANGUAGE_SPIRV
 
+mat4 mtxFromRows(vec4 _0, vec4 _1, vec4 _2, vec4 _3)
+{
+#if BGFX_SHADER_LANGUAGE_GLSL
+    return transpose(mat4(_0, _1, _2, _3) );
+#else
+    return mat4(_0, _1, _2, _3);
+#endif // BGFX_SHADER_LANGUAGE_GLSL
+}
+
+mat4 mtxFromCols(vec4 _0, vec4 _1, vec4 _2, vec4 _3)
+{
+#if BGFX_SHADER_LANGUAGE_GLSL
+    return mat4(_0, _1, _2, _3);
+#else
+    return transpose(mat4(_0, _1, _2, _3) );
+#endif // BGFX_SHADER_LANGUAGE_GLSL
+}
+
 uniform vec4  u_viewRect;
 uniform vec4  u_viewTexel;
 uniform mat4  u_view;