forked from 0ad/0ad
Itms
caf89fa04e
The file name did not match the content. Also little cleanup of some unnecessary includes. This was SVN commit r16431.
179 lines
4.2 KiB
C++
179 lines
4.2 KiB
C++
/* Copyright (C) 2012 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_TEXTRENDERER
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#define INCLUDED_TEXTRENDERER
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#include "graphics/ShaderProgramPtr.h"
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#include "maths/Matrix3D.h"
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#include "ps/CStrIntern.h"
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#include "ps/Shapes.h"
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class CFont;
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class CTextRenderer
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{
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public:
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CTextRenderer(const CShaderProgramPtr& shader);
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/**
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* Reset the text transform to the default, with (0,0) in the top-left of the screen.
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*/
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void ResetTransform();
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CMatrix3D GetTransform();
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void SetTransform(const CMatrix3D& transform);
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void Translate(float x, float y, float z);
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/**
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* Set clipping rectangle, in pre-transform coordinates (i.e. text is clipped against
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* this rect based purely on the x,y values passed into Put()). Text fully outside the
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* clipping rectangle may not be rendered. Should be used in conjunction with glScissor
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* for precise clipping - this is just an optimisation.
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*/
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void SetClippingRect(const CRect& rect);
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/**
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* Set the color for subsequent print calls.
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*/
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void Color(const CColor& color);
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/**
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* Set the color for subsequent print calls.
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*/
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void Color(float r, float g, float b, float a = 1.0);
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/**
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* Set the font for subsequent print calls.
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*/
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void Font(CStrIntern font);
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/**
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* Print formatted text at (0,0) under the current transform,
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* and advance the transform by the width of the text.
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*/
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void PrintfAdvance(const wchar_t* fmt, ...);
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/**
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* Print formatted text at (x,y) under the current transform.
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* Does not alter the current transform.
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*/
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void PrintfAt(float x, float y, const wchar_t* fmt, ...);
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/**
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* Print text at (0,0) under the current transform,
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* and advance the transform by the width of the text.
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*/
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void PutAdvance(const wchar_t* buf);
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/**
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* Print text at (x,y) under the current transform.
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* Does not alter the current transform.
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*/
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void Put(float x, float y, const wchar_t* buf);
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/**
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* Print text at (x,y) under the current transform.
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* Does not alter the current transform.
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* @p buf must be a UTF-8 string.
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*/
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void Put(float x, float y, const char* buf);
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/**
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* Print text at (x,y) under the current transform.
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* Does not alter the current transform.
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* @p buf must remain valid until Render() is called.
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* (This should be used to minimise memory copies when possible.)
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*/
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void Put(float x, float y, const std::wstring* buf);
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/**
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* Render all of the previously printed text calls.
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*/
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void Render();
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private:
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friend struct SBatchCompare;
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/**
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* A string (optionally owned by this object, or else pointing to an
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* externally-owned string) with a position.
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*/
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struct SBatchRun
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{
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private:
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SBatchRun& operator=(const SBatchRun&);
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public:
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SBatchRun()
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: text(NULL), owned(false)
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{
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}
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SBatchRun(const SBatchRun& str)
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: x(str.x), y(str.y), owned(str.owned)
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{
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if (owned)
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text = new std::wstring(*str.text);
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else
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text = str.text;
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}
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~SBatchRun()
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{
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if (owned)
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delete text;
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}
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float x, y;
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const std::wstring* text;
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bool owned;
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};
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/**
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* A list of SBatchRuns, with a single font/color/transform,
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* to be rendered in a single GL call.
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*/
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struct SBatch
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{
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size_t chars; // sum of runs[i].text->size()
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CMatrix3D transform;
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CColor color;
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shared_ptr<CFont> font;
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std::list<SBatchRun> runs;
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};
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void PutString(float x, float y, const std::wstring* buf, bool owned);
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CShaderProgramPtr m_Shader;
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CMatrix3D m_Transform;
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CRect m_Clipping;
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CColor m_Color;
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CStrIntern m_FontName;
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shared_ptr<CFont> m_Font;
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bool m_Dirty;
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std::list<SBatch> m_Batches;
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};
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#endif // INCLUDED_TEXTRENDERER
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