Inital commit

vendor/rmlui_backend/RmlUi_Renderer_GL2.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include <RmlUi/Core/RenderInterface.h>
+
+class RenderInterface_GL2 : public Rml::RenderInterface {
+public:
+	RenderInterface_GL2();
+
+	// The viewport should be updated whenever the window size changes.
+	void SetViewport(int viewport_width, int viewport_height);
+
+	// Sets up OpenGL states for taking rendering commands from RmlUi.
+	void BeginFrame();
+	void EndFrame();
+
+	// Optional, can be used to clear the framebuffer.
+	void Clear();
+
+	// -- Inherited from Rml::RenderInterface --
+
+	Rml::CompiledGeometryHandle CompileGeometry(Rml::Span<const Rml::Vertex> vertices, Rml::Span<const int> indices) override;
+	void ReleaseGeometry(Rml::CompiledGeometryHandle geometry) override;
+	void RenderGeometry(Rml::CompiledGeometryHandle handle, Rml::Vector2f translation, Rml::TextureHandle texture) override;
+
+	Rml::TextureHandle LoadTexture(Rml::Vector2i& texture_dimensions, const Rml::String& source) override;
+	Rml::TextureHandle GenerateTexture(Rml::Span<const Rml::byte> source, Rml::Vector2i source_dimensions) override;
+	void ReleaseTexture(Rml::TextureHandle texture_handle) override;
+
+	void EnableScissorRegion(bool enable) override;
+	void SetScissorRegion(Rml::Rectanglei region) override;
+
+	void EnableClipMask(bool enable) override;
+	void RenderToClipMask(Rml::ClipMaskOperation operation, Rml::CompiledGeometryHandle geometry, Rml::Vector2f translation) override;
+
+	void SetTransform(const Rml::Matrix4f* transform) override;
+
+	// Can be passed to RenderGeometry() to enable texture rendering without changing the bound texture.
+	static const Rml::TextureHandle TextureEnableWithoutBinding = Rml::TextureHandle(-1);
+
+private:
+	struct GeometryView {
+		Rml::Span<const Rml::Vertex> vertices;
+		Rml::Span<const int> indices;
+	};
+
+	int viewport_width = 0;
+	int viewport_height = 0;
+	bool transform_enabled = false;
+};