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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include "ogl_canvastools.hxx"
#include <canvas/debug.hxx>
#include <tools/diagnose_ex.h>
#include <basegfx/tools/canvastools.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/tools/tools.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/polygon/b2dpolygontriangulator.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <vector>
#include <com/sun/star/rendering/ARGBColor.hpp>
#include <GL/glew.h>
#include <glm/gtc/type_ptr.hpp>
//subdivision count of bezier segments
#define COUNT_OF_ADAPTIVE_SUBDIVISION 40
using namespace ::com::sun::star;
namespace oglcanvas
{
// triangulates polygon before
void renderComplexPolyPolygon( const ::basegfx::B2DPolyPolygon& rPolyPoly, RenderHelper *renderHelper,
glm::vec4 color)
{
::basegfx::B2DPolyPolygon aPolyPoly(rPolyPoly);
if( aPolyPoly.areControlPointsUsed() )
aPolyPoly = rPolyPoly.getAdaptiveSubdivision(COUNT_OF_ADAPTIVE_SUBDIVISION);
const ::basegfx::B2DPolygon& rTriangulatedPolygon(
::basegfx::triangulator::triangulate(aPolyPoly));
if(rTriangulatedPolygon.count()>0)
{
std::vector<glm::vec2> vertices;
vertices.reserve(rTriangulatedPolygon.count());
for( sal_uInt32 i=0; i<rTriangulatedPolygon.count(); i++ )
{
const ::basegfx::B2DPoint& rPt( rTriangulatedPolygon.getB2DPoint(i) );
vertices.push_back(glm::vec2(rPt.getX(),rPt.getY()));
}
renderHelper->renderVertexConstColor(vertices, color, GL_TRIANGLES);
}
}
void renderTransformComplexPolygon( const ::basegfx::B2DPolyPolygon& rPolyPoly, RenderHelper *renderHelper,
glm::vec4 color, glm::mat4 transform)
{
::basegfx::B2DPolyPolygon aPolyPoly(rPolyPoly);
if( aPolyPoly.areControlPointsUsed() )
aPolyPoly = rPolyPoly.getAdaptiveSubdivision(COUNT_OF_ADAPTIVE_SUBDIVISION);
const ::basegfx::B2DRange& rBounds(aPolyPoly.getB2DRange());
const double nWidth=rBounds.getWidth();
const double nHeight=rBounds.getHeight();
const ::basegfx::B2DPolygon& rTriangulatedPolygon(
::basegfx::triangulator::triangulate(aPolyPoly));
if(rTriangulatedPolygon.count()>0)
{
std::vector<glm::vec2> vertices;
vertices.reserve(rTriangulatedPolygon.count());
for( sal_uInt32 i=0; i<rTriangulatedPolygon.count(); i++ )
{
const ::basegfx::B2DPoint& rPt( rTriangulatedPolygon.getB2DPoint(i) );
vertices.push_back(glm::vec2(rPt.getX(),rPt.getY()));
}
renderHelper->renderTextureTransform( vertices, nWidth, nHeight, color, GL_TRIANGLES, transform);
}
}
/** only use this for line polygons.
better not leave triangulation to OpenGL. also, ignores texturing
*/
void renderPolyPolygon( const ::basegfx::B2DPolyPolygon& rPolyPoly, RenderHelper *renderHelper, glm::vec4 color)
{
::basegfx::B2DPolyPolygon aPolyPoly(rPolyPoly);
if( aPolyPoly.areControlPointsUsed() )
aPolyPoly = rPolyPoly.getAdaptiveSubdivision(COUNT_OF_ADAPTIVE_SUBDIVISION);
for(sal_uInt32 i=0; i<aPolyPoly.count(); i++ )
{
const ::basegfx::B2DPolygon& rPolygon( aPolyPoly.getB2DPolygon(i) );
const sal_uInt32 nPts=rPolygon.count();
const sal_uInt32 nExtPts=nPts + int(rPolygon.isClosed());
if(nExtPts>0)
{
std::vector<glm::vec2> vertices;
vertices.reserve(nExtPts);
for( sal_uInt32 j=0; j<nExtPts; j++ )
{
const ::basegfx::B2DPoint& rPt( rPolygon.getB2DPoint( j % nPts ) );
vertices.push_back(glm::vec2(rPt.getX(),rPt.getY()));
}
renderHelper->renderVertexConstColor(vertices, color, GL_LINE_STRIP);
}
}
}
glm::mat4 setupState( const ::basegfx::B2DHomMatrix& rTransform,
GLenum eSrcBlend,
GLenum eDstBlend)
{
const glm::mat4 aGLTransform = glm::mat4(
(float) rTransform.get(0,0), (float) rTransform.get(1,0), 0, 0,
(float) rTransform.get(0,1), (float) rTransform.get(1,1), 0, 0,
0, 0, 1, 0,
(float) rTransform.get(0,2), (float) rTransform.get(1,2), 0, 1);
glEnable(GL_BLEND);
glBlendFunc(eSrcBlend, eDstBlend);
return aGLTransform;
}
void renderOSD( const std::vector<double>& rNumbers, double scale, RenderHelper *renderHelper)
{
double y=4.0;
basegfx::B2DHomMatrix aTmp;
basegfx::B2DHomMatrix aScaleShear;
aScaleShear.shearX(-0.1);
aScaleShear.scale(scale,scale);
for( size_t i=0; i<rNumbers.size(); ++i )
{
aTmp.identity();
aTmp.translate(0,y);
y += 1.2*scale; //send to renderHelper
basegfx::B2DPolyPolygon aPoly=
basegfx::tools::number2PolyPolygon(rNumbers[i],10,3);
aTmp=aTmp*aScaleShear;
aPoly.transform(aTmp);
// glColor4f(0,1,0,1);
glm::vec4 color = glm::vec4(1, 0, 0, 0.5);
renderPolyPolygon(aPoly, renderHelper, color);
}
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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