Move solution and projects to src

src/Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/TexelFetchScale_fp.glsl

@@ -0,0 +1,26 @@
+ivec2 Helper_TexelFetchScale(ivec2 inputVec, int samplerIndex)
+{
+    float scale = s_render_scale[1 + samplerIndex];
+    if (scale == 1.0)
+    {
+        return inputVec;
+    }
+    if (scale < 0.0) // If less than 0, try interpolate between texels by using the screen position.
+    {
+        return ivec2(vec2(inputVec) * (-scale) + mod(gl_FragCoord.xy, 0.0 - scale));
+    }
+    else
+    {
+        return ivec2(vec2(inputVec) * scale);
+    }
+}
+
+int Helper_TextureSizeUnscale(int size, int samplerIndex)
+{
+    float scale = abs(s_render_scale[1 + samplerIndex]);
+    if (scale == 1.0)
+    {
+        return size;
+    }
+    return int(float(size) / scale);
+}