129 lines
2.7 KiB
C++
129 lines
2.7 KiB
C++
// overlay.h
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//
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// Copyright (C) 2001, Chris Laurel <claurel@shatters.net>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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#ifndef _OVERLAY_H_
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#define _OVERLAY_H_
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#include <iosfwd>
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#include <string>
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#include <vector>
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#include <fmt/printf.h>
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#include <Eigen/Core>
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class Color;
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class Overlay;
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class Renderer;
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class TextureFont;
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namespace celestia
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{
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class Rect;
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}
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// Custom streambuf class to support C++ operator style output. The
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// output is completely unbuffered so that it can coexist with printf
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// style output which the Overlay class also supports.
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class OverlayStreamBuf : public std::streambuf
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{
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public:
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OverlayStreamBuf();
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void setOverlay(Overlay*);
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int overflow(int c = EOF);
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enum UTF8DecodeState
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{
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UTF8DecodeStart = 0,
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UTF8DecodeMultibyte = 1,
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};
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private:
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Overlay* overlay{ nullptr };
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UTF8DecodeState decodeState{ UTF8DecodeStart };
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wchar_t decodedChar{ 0 };
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unsigned int decodeShift{ 0 };
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};
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class Overlay : public std::ostream
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{
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public:
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Overlay(Renderer&);
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Overlay() = delete;
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~Overlay() = default;
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void begin();
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void end();
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void setWindowSize(int, int);
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void setFont(const std::shared_ptr<TextureFont>&);
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void setColor(float r, float g, float b, float a);
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void setColor(const Color& c);
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void moveBy(float dx, float dy);
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void savePos();
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void restorePos();
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Renderer& getRenderer() const
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{
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return renderer;
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};
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void drawRectangle(const celestia::Rect&);
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void beginText();
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void endText();
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void print(wchar_t);
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void print(char);
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template <typename... T>
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void print(const char* format, const T&... args)
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{
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print_impl(fmt::format(format, args...));
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}
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template <typename... T>
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void printf(const char* format, const T&... args)
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{
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print_impl(fmt::sprintf(format, args...));
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}
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private:
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void print_impl(const std::string&);
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int windowWidth{ 1 };
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int windowHeight{ 1 };
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std::shared_ptr<TextureFont> font{ nullptr };
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bool useTexture{ false };
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bool fontChanged{ false };
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int textBlock{ 0 };
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float xoffset{ 0.0f };
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float yoffset{ 0.0f };
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OverlayStreamBuf sbuf;
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Renderer& renderer;
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struct CursorPosition
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{
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void reset()
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{
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x = y = 0.125f;
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}
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float x, y;
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};
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CursorPosition global { 0.0f, 0.0f };
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std::vector<CursorPosition> posStack;
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Eigen::Matrix4f projection;
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};
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#endif // _OVERLAY_H_
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