/******************************************************************************
 * $id: mapoglrenderer.h 7725 2011-04-09 15:56:58Z toby $
 *
 * Project:  MapServer
 * Purpose:  Various template processing functions.
 * Author:   Steve Lime and the MapServer team.
 *
 ******************************************************************************
 * Copyright (c) 1996-2008 Regents of the University of Minnesota.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in 
 * all copies of this Software or works derived from this Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/

#ifndef OGL_H
#define OGL_H

#ifdef USE_OGL

#include "mapoglcontext.h"
#include "mapserver.h"

#include <vector>
#include <map>
#include <memory>

#include <FTGL/ftgl.h>
#include <FTGL/FTGLTextureFont.h>


class OglCache
{
public:
    ~OglCache()
    {
        glDeleteTextures(1, &texture);
    }
    GLuint texture;
    ms_uint32 width;
    ms_uint32 height;
    ms_uint32 patternDistance;
};

typedef OglCache* OglCachePtr;

class OglRenderer {
public:
    OglRenderer(ms_uint32 width, ms_uint32 height, colorObj* color = NULL);
    virtual ~OglRenderer();

    void renderPolyline(shapeObj *p, colorObj *c, double width, int patternlength, double* pattern, int lineCap = MS_CJC_ROUND, int joinStyle = MS_CJC_ROUND, colorObj *outlinecolor = NULL, double outlinewidth = 0);
    void renderPolygon(shapeObj*, colorObj *color, colorObj *outlinecolor, double outlinewidth, const OglCachePtr& tile = OglCachePtr(), int lineCap=MS_CJC_ROUND, int joinStyle=MS_CJC_ROUND);
    void renderGlyphs(double x, double y, colorObj *color, colorObj *outlinecolor, double size, const char* font, char *thechars, double angle, colorObj *shadowcolor, double shdx, double shdy);
    void renderPixmap(symbolObj *symbol, double x, double y, double angle, double scale);
    void renderEllipse(double x, double y, double angle, double w, double h, colorObj *color, colorObj *outlinecolor, double outlinewidth);
    void renderVectorSymbol(double x, double y, symbolObj *symbol, double scale, double angle, colorObj *c, colorObj *oc, double ow);
    void renderTile(const OglCachePtr& tile, double x, double y, double angle);
    void renderPolylineTile(shapeObj *p, const OglCachePtr& tile);

    static bool getStringBBox(char *font, double size, char *string, rectObj *rect, double** advances);    
    void setTransparency(double transparency);    
    
    void readRasterBuffer(rasterBufferObj * rb);
    void drawRasterBuffer(rasterBufferObj *overlay, double opacity, int srcX, int srcY, int dstX, int dstY, int width, int height);
    static void initializeRasterBuffer(rasterBufferObj * rb, int width, int height, bool useAlpha);    

    OglCachePtr getTexture();
    int getWidth() const { return width; }
    int getHeight() const { return height; }
    bool isValid() const { return valid && context->isValid(); }
protected:
    OglCachePtr texture;
    
    ms_uint32 width;
    ms_uint32 height;
    double transparency;
    bool valid;

    GLint viewportX;
    GLint viewportY;
    GLsizei viewportWidth;
    GLsizei viewportHeight;

    typedef std::map<const char*,std::map<double,FTFont*> > fontCache_t;
    typedef std::map<symbolObj*,std::map<double,GLuint> > dashCache_t;

    static FTFont* getFTFont(const char* font, double size);
    bool loadLine(shapeObj* shape, double width, int patternlength, double *pattern);
    double drawQuad(pointObj *p1, pointObj *p2, double width, double tilelength = 0.0, double textureStart = 0.0);
    double drawTriangles(pointObj *p1, pointObj *p2, double width, double tilelength = 0.0, double textureStart = 0.0);
    void drawVectorLineStrip(symbolObj *symbol, double width);
    void drawFan(pointObj* center, pointObj* from, pointObj* to, int resolution);
    void createShapes();
    
    GLuint createTexture(ms_uint32 x, ms_uint32 y);

    void makeCurrent();
    void setColor(colorObj *color);

    GLUtesselator *tess;
    enum shapes_t{ circle = 0};

    OglContext* context;

    static dashCache_t dashCache;
    static fontCache_t fontCache;
    static std::vector<GLuint> shapes;
    static std::vector<symbolObj*> testSymbols;
    static ms_uint32 OUTLINE_WIDTH;
    static ms_uint32 FONT_SIZE;
    static ms_uint32 FONT_RES;
    static double OGL_PI;
    static ms_uint32 SHAPE_CIRCLE_RES;
    static double SHAPE_CIRCLE_RADIUS;
    static double SIZE_RES;
};

#endif /* USE_OGL */
#endif