Added custom font interface that scales font glyphs down to avoid downsampling

src/ui/FontEngineScaled/FontEngineInterfaceScaled.h

@@ -0,0 +1,75 @@
+/*
+ * This source file is modified from a part, the HTML/CSS Interface Middleware
+ *
+ * For the latest information, see http://github.com/mikke89/RmlUi
+ *
+ * Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#ifndef RMLUI_CORE_FONTENGINESCALED_FONTENGINEINTERFACESCALED_H
+#define RMLUI_CORE_FONTENGINESCALED_FONTENGINEINTERFACESCALED_H
+
+#include "RmlUi/Core/FontEngineInterface.h"
+
+namespace RecompRml {
+
+using namespace Rml;
+
+class RMLUICORE_API FontEngineInterfaceScaled : public FontEngineInterface {
+public:
+	FontEngineInterfaceScaled();
+	virtual ~FontEngineInterfaceScaled();
+
+	/// Adds a new font face to the database. The face's family, style and weight will be determined from the face itself.
+	bool LoadFontFace(const String& file_name, bool fallback_face, Style::FontWeight weight) override;
+
+	/// Adds a new font face to the database using the provided family, style and weight.
+	bool LoadFontFace(const byte* data, int data_size, const String& font_family, Style::FontStyle style, Style::FontWeight weight,
+		bool fallback_face) override;
+
+	/// Returns a handle to a font face that can be used to position and render text. This will return the closest match
+	/// it can find, but in the event a font family is requested that does not exist, NULL will be returned instead of a
+	/// valid handle.
+	FontFaceHandle GetFontFaceHandle(const String& family, Style::FontStyle style, Style::FontWeight weight, int size) override;
+
+	/// Prepares for font effects by configuring a new, or returning an existing, layer configuration.
+	FontEffectsHandle PrepareFontEffects(FontFaceHandle, const FontEffectList& font_effects) override;
+
+	/// Returns the font metrics of the given font face.
+	const FontMetrics& GetFontMetrics(FontFaceHandle handle) override;
+
+	/// Returns the width a string will take up if rendered with this handle.
+	int GetStringWidth(FontFaceHandle, const String& string, float letter_spacing, Character prior_character) override;
+
+	/// Generates the geometry required to render a single line of text.
+	int GenerateString(FontFaceHandle, FontEffectsHandle, const String& string, const Vector2f& position, const Colourb& colour, float opacity,
+		float letter_spacing, GeometryList& geometry) override;
+
+	/// Returns the current version of the font face.
+	int GetVersion(FontFaceHandle handle) override;
+
+	/// Releases resources owned by sized font faces, including their textures and rendered glyphs.
+	void ReleaseFontResources() override;
+};
+
+} // namespace Rml
+#endif