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gl_drawvectorgraphic.c
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gl_drawvectorgraphic.c
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/**\file gl_drawvectorgraphic.c
*\section License
* License: GPL
* Online License Link: http://www.gnu.org/licenses/gpl.html
*
*\author Copyright © 2008-2010 Daniel Swanson <danij@dengine.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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#define DENG_NO_API_MACROS_SVG
#include <string.h>
#include <assert.h>
#include "de_base.h"
#include "de_console.h"
#include "gl/svg.h"
#define DEFAULT_SCALE (1)
#define DEFAULT_ANGLE (0)
static boolean inited = false;
static uint svgCount;
static Svg** svgs;
static Svg* svgForId(svgid_t id)
{
if(id != 0)
{
uint i;
for(i = 0; i < svgCount; ++i)
{
Svg* svg = svgs[i];
if(Svg_UniqueId(svg) == id)
return svg;
}
}
return NULL;
}
/// @return 1-based index for @a svg if found, else zero.
static uint indexForSvg(Svg* svg)
{
if(svg)
{
uint i;
for(i = 0; i < svgCount; ++i)
{
if(svgs[i] == svg) return i+1;
}
}
return 0;
}
/**
* Link @a svg into the global collection.
* @pre Not presently linked.
*/
static Svg* insertSvg(Svg* svg)
{
if(svg)
{
svgs = (Svg**)realloc(svgs, sizeof(*svgs) * ++svgCount);
if(!svgs) Con_Error("insertSvg: Failed on allocation of %lu bytes enlarging SVG collection.", (unsigned long) (sizeof(*svgs) * svgCount));
svgs[svgCount-1] = svg;
}
return svg;
}
/**
* Unlink @a svg if present in the global collection.
*/
static Svg* removeSvg(Svg* svg)
{
uint index = indexForSvg(svg);
if(index)
{
index--; // 1-based index.
// Unlink from the collection.
if(index != svgCount-1)
memmove(svgs + index, svgs + index + 1, sizeof(*svgs) * (svgCount - index - 1));
svgs = (Svg**)realloc(svgs, sizeof(*svgs) * --svgCount);
}
return svg;
}
static void deleteSvg(Svg* svg)
{
if(!svg) return;
removeSvg(svg);
Svg_Delete(svg);
}
static void clearSvgs(void)
{
while(svgCount)
{
deleteSvg(*svgs);
}
}
void R_InitSvgs(void)
{
if(inited)
{
// Allow re-init.
clearSvgs();
}
else
{
// First init.
svgs = NULL;
svgCount = 0;
}
inited = true;
}
void R_ShutdownSvgs(void)
{
if(!inited) return;
clearSvgs();
inited = false;
}
void R_UnloadSvgs(void)
{
uint i;
if(!inited) return;
if(DD_GetInteger(DD_NOVIDEO) || DD_GetInteger(DD_DEDICATED)) return; // Nothing to do.
for(i = 0; i < svgCount; ++i)
{
Svg_Unload(svgs[i]);
}
}
void GL_DrawSvg3(svgid_t id, const Point2Rawf* origin, float scale, float angle)
{
Svg* svg = svgForId(id);
if(!origin)
{
#if _DEBUG
if(id != 0)
Con_Message("GL_DrawSvg: Invalid origin argument (=NULL), aborting draw.\n");
#endif
return;
}
if(!svg)
{
#if _DEBUG
if(id != 0)
Con_Message("GL_DrawSvg: Unknown SVG id #%u, aborting draw.\n", (unsigned int)id);
#endif
return;
}
if(!Svg_Prepare(svg))
{
#if _DEBUG
Con_Message("GL_DrawSvg: Failed preparing SVG #%u, aborting draw.\n", (unsigned int)id);
#endif
return;
}
DGL_MatrixMode(DGL_MODELVIEW);
DGL_Translatef(origin->x, origin->y, 0);
if(angle != 0 || scale != 1)
{
DGL_PushMatrix();
DGL_Rotatef(angle, 0, 0, 1);
DGL_Scalef(scale, scale, 1);
}
Svg_Draw(svg);
DGL_MatrixMode(DGL_MODELVIEW);
if(angle != 0 || scale != 1)
DGL_PopMatrix();
DGL_Translatef(-origin->x, -origin->y, 0);
}
void GL_DrawSvg2(svgid_t id, const Point2Rawf* origin, float scale)
{
GL_DrawSvg3(id, origin, scale, DEFAULT_ANGLE);
}
void GL_DrawSvg(svgid_t id, const Point2Rawf* origin)
{
GL_DrawSvg2(id, origin, DEFAULT_SCALE);
}
void R_NewSvg(svgid_t id, const def_svgline_t* lines, uint numLines)
{
Svg* svg, *oldSvg;
// Valid id?
if(id == 0) Con_Error("R_NewSvg: Invalid id, zero is reserved.");
// A new vector graphic.
svg = Svg_FromDef(id, lines, numLines);
if(!svg)
{
#if _DEBUG
Con_Message("Warning:R_NewSvg: Failed constructing new SVG #%u, aborting.", (unsigned int)id);
#endif
return;
}
// Already a vector graphic with this id?
oldSvg = svgForId(id);
if(oldSvg)
{
// We are replacing an existing vector graphic.
deleteSvg(oldSvg);
}
// Add the new SVG to the global collection.
insertSvg(svg);
}
DENG_DECLARE_API(Svg) =
{
{ DE_API_SVG_latest },
R_NewSvg,
GL_DrawSvg,
GL_DrawSvg2,
GL_DrawSvg3
};