diff --git a/include/bgfx.c99.h b/include/bgfx.c99.h
index 905de697..92bf737c 100644
--- a/include/bgfx.c99.h
+++ b/include/bgfx.c99.h
@@ -94,6 +94,7 @@ typedef enum bgfx_texture_format
     BGFX_TEXTURE_FORMAT_R16F,
     BGFX_TEXTURE_FORMAT_R32,
     BGFX_TEXTURE_FORMAT_R32F,
+    BGFX_TEXTURE_FORMAT_RG8,
     BGFX_TEXTURE_FORMAT_RG16,
     BGFX_TEXTURE_FORMAT_RG16F,
     BGFX_TEXTURE_FORMAT_RG32,
diff --git a/include/bgfx.h b/include/bgfx.h
index d9929e5e..5ab63fc0 100644
--- a/include/bgfx.h
+++ b/include/bgfx.h
@@ -126,6 +126,7 @@ namespace bgfx
 			R16F,
 			R32,
 			R32F,
+			RG8,
 			RG16,
 			RG16F,
 			RG32,
diff --git a/src/image.cpp b/src/image.cpp
index e1d13155..c795a613 100644
--- a/src/image.cpp
+++ b/src/image.cpp
@@ -33,6 +33,7 @@ namespace bgfx
 		{  16, 1, 1,  2 }, // R16F
 		{  32, 1, 1,  4 }, // R32
 		{  32, 1, 1,  4 }, // R32F
+		{  16, 1, 1,  2 }, // RG8
 		{  32, 1, 1,  4 }, // RG16
 		{  32, 1, 1,  4 }, // RG16F
 		{  64, 1, 1,  8 }, // RG32
@@ -81,6 +82,7 @@ namespace bgfx
 		"R16F",      // R16F
 		"R32",       // R32
 		"R32F",      // R32F
+		"RG8",       // RG8
 		"RG16",      // RG16
 		"RG16F",     // RG16F
 		"RG32",      // RG32
diff --git a/src/renderer_d3d11.cpp b/src/renderer_d3d11.cpp
index 1b2dcae0..6bc0e793 100644
--- a/src/renderer_d3d11.cpp
+++ b/src/renderer_d3d11.cpp
@@ -220,6 +220,7 @@ namespace bgfx
 		{ DXGI_FORMAT_R16_FLOAT,          DXGI_FORMAT_R16_FLOAT,             DXGI_FORMAT_UNKNOWN           }, // R16F
 		{ DXGI_FORMAT_R32_UINT,           DXGI_FORMAT_R32_UINT,              DXGI_FORMAT_UNKNOWN           }, // R32
 		{ DXGI_FORMAT_R32_FLOAT,          DXGI_FORMAT_R32_FLOAT,             DXGI_FORMAT_UNKNOWN           }, // R32F
+		{ DXGI_FORMAT_R8G8_UNORM,         DXGI_FORMAT_R8G8_UNORM,            DXGI_FORMAT_UNKNOWN           }, // RG8
 		{ DXGI_FORMAT_R16G16_UNORM,       DXGI_FORMAT_R16G16_UNORM,          DXGI_FORMAT_UNKNOWN           }, // RG16
 		{ DXGI_FORMAT_R16G16_FLOAT,       DXGI_FORMAT_R16G16_FLOAT,          DXGI_FORMAT_UNKNOWN           }, // RG16F
 		{ DXGI_FORMAT_R32G32_UINT,        DXGI_FORMAT_R32G32_UINT,           DXGI_FORMAT_UNKNOWN           }, // RG32
diff --git a/src/renderer_d3d9.cpp b/src/renderer_d3d9.cpp
index 455e2f19..41bd8107 100644
--- a/src/renderer_d3d9.cpp
+++ b/src/renderer_d3d9.cpp
@@ -206,6 +206,7 @@ namespace bgfx
 		{ D3DFMT_R16F          }, // R16F
 		{ D3DFMT_UNKNOWN       }, // R32
 		{ D3DFMT_R32F          }, // R32F
+		{ D3DFMT_A8L8          }, // RG8
 		{ D3DFMT_G16R16        }, // RG16
 		{ D3DFMT_G16R16F       }, // RG16F
 		{ D3DFMT_UNKNOWN       }, // RG32
diff --git a/src/renderer_gl.cpp b/src/renderer_gl.cpp
index ac0558d5..31dd3eab 100644
--- a/src/renderer_gl.cpp
+++ b/src/renderer_gl.cpp
@@ -199,6 +199,7 @@ namespace bgfx
 		{ GL_R16F,                                     GL_RED,                                      GL_HALF_FLOAT,                  true  }, // R16F
 		{ GL_R32UI,                                    GL_RED,                                      GL_UNSIGNED_INT,                true  }, // R32
 		{ GL_R32F,                                     GL_RED,                                      GL_FLOAT,                       true  }, // R32F
+		{ GL_RG8,                                      GL_RG,                                       GL_UNSIGNED_BYTE,               true  }, // RG8
 		{ GL_RG16,                                     GL_RG,                                       GL_UNSIGNED_SHORT,              true  }, // RG16
 		{ GL_RG16F,                                    GL_RG,                                       GL_FLOAT,                       true  }, // RG16F
 		{ GL_RG32UI,                                   GL_RG,                                       GL_UNSIGNED_INT,                true  }, // RG32
@@ -247,6 +248,7 @@ namespace bgfx
 		GL_R16F,     // R16F
 		GL_R32UI,    // R32
 		GL_R32F,     // R32F
+		GL_RG8,      // RG8
 		GL_RG16,     // RG16
 		GL_RG16F,    // RG16F
 		GL_RG32UI,   // RG32
@@ -347,6 +349,7 @@ namespace bgfx
 			EXT_texture_compression_s3tc,
 			EXT_texture_filter_anisotropic,
 			EXT_texture_format_BGRA8888,
+			EXT_texture_rg,
 			EXT_texture_sRGB,
 			EXT_texture_storage,
 			EXT_texture_swizzle,
@@ -487,6 +490,7 @@ namespace bgfx
 		{ "EXT_texture_compression_s3tc",          false,                             true  },
 		{ "EXT_texture_filter_anisotropic",        false,                             true  },
 		{ "EXT_texture_format_BGRA8888",           false,                             true  },
+		{ "EXT_texture_rg",                        false,                             true  }, // GLES2 extension.
 		{ "EXT_texture_sRGB",                      false,                             true  },
 		{ "EXT_texture_storage",                   false,                             true  },
 		{ "EXT_texture_swizzle",                   false,                             true  },
diff --git a/src/renderer_gl.h b/src/renderer_gl.h
index d0a06dc9..955e6505 100644
--- a/src/renderer_gl.h
+++ b/src/renderer_gl.h
@@ -115,6 +115,10 @@ typedef uint64_t GLuint64;
 #	define GL_R32F 0x822E
 #endif // GL_R32F
 
+#ifndef GL_RG8
+#	define GL_RG8 0x822B
+#endif // GL_RG8
+
 #ifndef GL_RG16
 #	define GL_RG16 0x822C
 #endif // GL_RG16
diff --git a/tools/shaderc/shaderc.cpp b/tools/shaderc/shaderc.cpp
index e4d76896..3d29a418 100644
--- a/tools/shaderc/shaderc.cpp
+++ b/tools/shaderc/shaderc.cpp
@@ -558,7 +558,7 @@ void strreplace(char* _str, const char* _find, const char* _replace)
 
 	char* replace = (char*)alloca(len+1);
 	bx::strlcpy(replace, _replace, len+1);
-	for (uint32_t ii = strlen(replace); ii < len; ++ii)
+	for (size_t ii = strlen(replace); ii < len; ++ii)
 	{
 		replace[ii] = ' ';
 	}
@@ -2052,7 +2052,7 @@ int main(int _argc, const char* _argv[])
 				preprocessor.run(input);
 				delete [] data;
 
-				size = preprocessor.m_preprocessed.size();
+				size = (uint32_t)preprocessor.m_preprocessed.size();
 				data = new char[size+padding+1];
 				memcpy(data, preprocessor.m_preprocessed.c_str(), size);
 				memset(&data[size], 0, padding+1);