celestia/src/celengine/overlay.h

109 lines
2.2 KiB
C++

// overlay.h
//
// Copyright (C) 2001, Chris Laurel <claurel@shatters.net>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
#ifndef _OVERLAY_H_
#define _OVERLAY_H_
#include <algorithm>
#include <array>
#include <iostream>
#include <string>
#include <celutil/color.h>
#include <celtxf/texturefont.h>
class Overlay;
class Renderer;
class Rect;
// Custom streambuf class to support C++ operator style output. The
// output is completely unbuffered so that it can coexist with printf
// style output which the Overlay class also supports.
class OverlayStreamBuf : public std::streambuf
{
public:
OverlayStreamBuf();
void setOverlay(Overlay*);
int overflow(int c = EOF);
enum UTF8DecodeState
{
UTF8DecodeStart = 0,
UTF8DecodeMultibyte = 1,
};
private:
Overlay* overlay{ nullptr };
UTF8DecodeState decodeState{ UTF8DecodeStart };
wchar_t decodedChar{ 0 };
unsigned int decodeShift{ 0 };
};
class Overlay : public std::ostream
{
public:
Overlay(const Renderer&);
Overlay() = delete;
~Overlay() = default;
void begin();
void end();
void setWindowSize(int, int);
void setFont(TextureFont*);
void setColor(float r, float g, float b, float a) const;
void setColor(const Color& c) const;
void moveBy(float dx, float dy, float dz = 0.0f) const;
void savePos() const
{
glPushMatrix();
};
void restorePos() const
{
glPopMatrix();
};
const Renderer& getRenderer() const
{
return renderer;
};
void drawRectangle(const Rect&);
void beginText();
void endText();
void print(wchar_t);
void print(char);
void print(const char*);
private:
int windowWidth{ 1 };
int windowHeight{ 1 };
TextureFont* font{ nullptr };
bool useTexture{ false };
bool fontChanged{ false };
int textBlock{ 0 };
float xoffset{ 0.0f };
float yoffset{ 0.0f };
float lineWidth { 1.0f };
OverlayStreamBuf sbuf;
const Renderer& renderer;
};
#endif // _OVERLAY_H_