Fix 8888 high-quality textures on GLES/arm

GLES doesn't support uint 8888 so bytes must be swapped on little endian
architecture.

core/rend/TexCache.h

@@ -68,8 +68,16 @@ void palette_update();
 
 // Unpack to 32-bit word
 
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && defined(GLES)
+// GLES doesn't have the native ordering 8888 so we need to put bytes in the RGBA memory order.
+#define ARGB8888( word ) ( ((word >> 0) & 0xFF000000) | (((word >> 16) & 0xFF) << 0) | (((word >> 8) & 0xFF) << 8) | ((word & 0xFF) << 16) )
+
+#else
+
 #define ARGB8888( word ) ( ((word >> 24) & 0xFF) | (((word >> 16) & 0xFF) << 24) | (((word >> 8) & 0xFF) << 16) | ((word & 0xFF) << 8) )
 
+#endif
+
 template<class PixelPacker>
 __forceinline u32 YUV422(s32 Y,s32 Yu,s32 Yv)
 {
@@ -105,7 +113,11 @@ struct pp_8888
 {
 	__forceinline static u32 packRGB(u8 R,u8 G,u8 B)
 	{
-		return (R << 24) | (G << 16) | (B << 8) | 0xFF;
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && defined(GLES)
+		return (R << 0) | (G << 8) | (B << 16);
+#else
+		return (R << 24) | (G << 16) | (B << 8);
+#endif
 	}
 };
 

core/rend/gles/gles.h

@@ -31,6 +31,9 @@
 #endif
 #endif
 
+#ifndef GL_UNSIGNED_INT_8_8_8_8
+#define GL_UNSIGNED_INT_8_8_8_8 0x8035
+#endif
 
 #define glCheck() do { if (unlikely(settings.validate.OpenGlChecks)) { verify(glGetError()==GL_NO_ERROR); } } while(0)
 #define eglCheck() false

core/rend/gles/gltex.cpp

@@ -341,8 +341,13 @@ struct TextureCacheData
 		if (texID) {
 			//upload to OpenGL !
 			glcache.BindTexture(GL_TEXTURE_2D, texID);
-			GLuint comps=textype==GL_UNSIGNED_SHORT_5_6_5?GL_RGB:GL_RGBA;
+#ifdef GLES
-			glTexImage2D(GL_TEXTURE_2D, 0,comps , w, h, 0, comps, textype, temp_tex_buffer);
+			GLuint actual_textype = textype == GL_UNSIGNED_INT_8_8_8_8 ? GL_UNSIGNED_BYTE : textype;
+			glTexImage2D(GL_TEXTURE_2D, 0, comps, w, h, 0, comps, actual_textype,
+					temp_tex_buffer);
+#else
+			glTexImage2D(GL_TEXTURE_2D, 0, comps, w, h, 0, comps, textype, temp_tex_buffer);
+#endif
 			if (tcw.MipMapped && settings.rend.UseMipmaps)
 				glGenerateMipmap(GL_TEXTURE_2D);
 		}