Move OpenGL texture upload mapping

src/rtt.cpp

@@ -3,6 +3,9 @@
 #include "rtt.h"
 #include "util.h"
 #include "app.h"
+#include "renderer_gl/opengl_capabilities.h"
+
+#include <cstdint>
 
 RTT& RTT::operator=(RTT&& other)
 {
@@ -204,9 +207,8 @@ bool RTT::create(int width, int height, int tex/* = -1*/, GLint internal_format,
             texID = tex;
         }
 
-        auto ifmt = GL_UNSIGNED_BYTE;
-        if (internal_format == GL_RGBA32F) ifmt = GL_FLOAT;
-        if (internal_format == GL_RGBA16F) ifmt = GL_HALF_FLOAT;
+        const auto ifmt = static_cast<GLenum>(
+            pp::renderer::gl::texture_upload_type_for_internal_format(static_cast<std::uint32_t>(internal_format)));
 
         glBindTexture(GL_TEXTURE_2D, texID);
         if (tex == -1)