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//
// AlphabetLetter.h
// Dasher
//
// Created by Alan Lawrence on 20/03/2009.
// Copyright 2009 Cavendish Laboratory. All rights reserved.
//
#if TARGET_OS_IPHONE
#import <OpenGLES/ES1/gl.h>
#else
#import <AppKit/AppKit.h>
#import <OpenGL/gl.h>
#endif
#import "DasherScreen.h"
#include <string>
namespace Dasher {
class OpenGLScreen : public CLabelListScreen {
protected:
class AlphabetLetter : public Label {
public: //to OpenGLScreen and subclasses - all read by DrawString
NSString *str;
GLuint texture;
GLfloat texcoords[8];
CGSize sz; //at base font size, or wrapped size if appropriate
AlphabetLetter(OpenGLScreen *pScreen, const std::string &strText, unsigned int iWrapSize);
~AlphabetLetter();
void PrepareTexture();
};
public:
OpenGLScreen(screenint iWidth, screenint iHeight, GLshort backingWidth, GLshort backingHeight, GLfloat tc_x, GLfloat tc_y, GLuint *textures);
~OpenGLScreen();
///Note, subclasses should override to additionally have buffers ready, etc.
void Display();
void SetColourScheme(const CColourIO::ColourInfo *pColourScheme);
void Polyline(point *Points, int iNum, int iWidth, int iColour);
void Polygon(point *points, int iNum, int iFillColour, int iOutlineColour, int iWidth);
void DrawRectangle(int x1, int y1, int x2, int y2, int iFillColorIndex, int iOutlineColour, int iThickness);
void DrawCircle(screenint iCX, screenint iCY, screenint iR, int iFillColour, int iLineColour, int iLineWidth);
bool MultiSizeFonts() {return true;}
AlphabetLetter *MakeLabel(const std::string &strText,unsigned int iWrapSize=0);
std::pair<screenint,screenint> TextSize(CDasherScreen::Label *label, unsigned int iFontSize);
void DrawString(CDasherScreen::Label *label, screenint x, screenint y, unsigned int iFontSize, int iColour);
//leave virtual: SendMarker, Display
protected:
void resize(screenint iWidth, screenint iHeight, GLshort backingWidth, GLshort backingHeight, GLfloat tc_x, GLfloat tc_y);
void RegenerateLabels();
///Render a string onto a CoreGraphics context, using the context's current colour etc.
/// \param iFontSize font size to use
/// \param bWrap if true, constrain to screen width and wrap across multiple lines (if necessary);
/// if false, render on a single line.
virtual void RenderStringOntoCGContext(NSString *string, CGContextRef context, unsigned int iFontSize, bool bWrap)=0;
/// Get the pixel dimensions of a string when rendered in a specified font size
/// \param bWrap if true, string should be wrapped to the screen width, possibly
/// over multiple lines (=> returned height will reflect this); if false,
/// keep on one line (even if that makes it wider than the screen)
virtual CGSize TextSize(NSString *str, unsigned int iFontSize, bool bWrap)=0;
private:
typedef struct {
float r, g, b;
} colour_t;
//colours in use, we cache these as floats for feeding to OpenGL.
colour_t *colourTable;
///Caches for circleCallbackWithCentrePoint:... (see therein)
float circ_rad;
GLshort *circ_coords;
int circPoints;
GLshort rectcoords[8];
GLfloat texcoords[8];
GLuint *textures;
};
}
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