1202 lines
38 KiB
C++
1202 lines
38 KiB
C++
/*
|
|
* This program source code file is part of KICAD, a free EDA CAD application.
|
|
*
|
|
* Copyright (C) 2012 Torsten Hueter, torstenhtr <at> gmx.de
|
|
* Copyright (C) 2012 Kicad Developers, see change_log.txt for contributors.
|
|
* Copyright (C) 2013-2016 CERN
|
|
* @author Maciej Suminski <maciej.suminski@cern.ch>
|
|
*
|
|
* Graphics Abstraction Layer (GAL) for OpenGL
|
|
*
|
|
* 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, you may find one here:
|
|
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
|
|
* or you may search the http://www.gnu.org website for the version 2 license,
|
|
* or you may write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
|
|
#include <gal/opengl/opengl_gal.h>
|
|
#include <gal/definitions.h>
|
|
|
|
#include <wx/log.h>
|
|
#include <macros.h>
|
|
#ifdef __WXDEBUG__
|
|
#include <profile.h>
|
|
#endif /* __WXDEBUG__ */
|
|
|
|
#include <limits>
|
|
#include <boost/bind.hpp>
|
|
|
|
using namespace KIGFX;
|
|
|
|
static void InitTesselatorCallbacks( GLUtesselator* aTesselator );
|
|
const int glAttributes[] = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, WX_GL_DEPTH_SIZE, 8, 0 };
|
|
wxGLContext* OPENGL_GAL::glContext = NULL;
|
|
|
|
OPENGL_GAL::OPENGL_GAL( wxWindow* aParent, wxEvtHandler* aMouseListener,
|
|
wxEvtHandler* aPaintListener, const wxString& aName ) :
|
|
wxGLCanvas( aParent, wxID_ANY, (int*) glAttributes, wxDefaultPosition, wxDefaultSize,
|
|
wxEXPAND, aName ),
|
|
mouseListener( aMouseListener ),
|
|
paintListener( aPaintListener ),
|
|
cachedManager( true ),
|
|
nonCachedManager( false ),
|
|
overlayManager( false )
|
|
{
|
|
if( glContext == NULL )
|
|
glContext = new wxGLContext( this );
|
|
|
|
// Check if OpenGL requirements are met
|
|
runTest();
|
|
|
|
// Make VBOs use shaders
|
|
cachedManager.SetShader( shader );
|
|
nonCachedManager.SetShader( shader );
|
|
overlayManager.SetShader( shader );
|
|
|
|
// Initialize the flags
|
|
isFramebufferInitialized = false;
|
|
isGrouping = false;
|
|
groupCounter = 0;
|
|
|
|
#ifdef RETINA_OPENGL_PATCH
|
|
SetViewWantsBestResolution( true );
|
|
#endif
|
|
|
|
// Connecting the event handlers
|
|
Connect( wxEVT_PAINT, wxPaintEventHandler( OPENGL_GAL::onPaint ) );
|
|
|
|
// Mouse events are skipped to the parent
|
|
Connect( wxEVT_MOTION, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_LEFT_DOWN, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_LEFT_UP, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_LEFT_DCLICK, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_MIDDLE_DOWN, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_MIDDLE_UP, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_MIDDLE_DCLICK, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_RIGHT_DOWN, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_RIGHT_UP, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_RIGHT_DCLICK, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
Connect( wxEVT_MOUSEWHEEL, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
#if wxCHECK_VERSION( 3, 1, 0 ) || defined( USE_OSX_MAGNIFY_EVENT )
|
|
Connect( wxEVT_MAGNIFY, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
#endif
|
|
#if defined _WIN32 || defined _WIN64
|
|
Connect( wxEVT_ENTER_WINDOW, wxMouseEventHandler( OPENGL_GAL::skipMouseEvent ) );
|
|
#endif
|
|
|
|
SetSize( aParent->GetSize() );
|
|
screenSize = VECTOR2I( aParent->GetSize() );
|
|
|
|
// Grid color settings are different in Cairo and OpenGL
|
|
SetGridColor( COLOR4D( 0.8, 0.8, 0.8, 0.1 ) );
|
|
|
|
// Tesselator initialization
|
|
tesselator = gluNewTess();
|
|
InitTesselatorCallbacks( tesselator );
|
|
|
|
if( tesselator == NULL )
|
|
throw std::runtime_error( "Could not create the tesselator" );
|
|
|
|
gluTessProperty( tesselator, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_POSITIVE );
|
|
|
|
currentManager = &nonCachedManager;
|
|
}
|
|
|
|
|
|
OPENGL_GAL::~OPENGL_GAL()
|
|
{
|
|
glFlush();
|
|
|
|
gluDeleteTess( tesselator );
|
|
ClearCache();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::BeginDrawing()
|
|
{
|
|
if( !IsShownOnScreen() )
|
|
return;
|
|
|
|
SetCurrent( *glContext );
|
|
clientDC = new wxClientDC( this );
|
|
|
|
#ifdef RETINA_OPENGL_PATCH
|
|
const float scaleFactor = GetBackingScaleFactor();
|
|
#else
|
|
const float scaleFactor = 1.0f;
|
|
#endif
|
|
|
|
// Set up the view port
|
|
glMatrixMode( GL_PROJECTION );
|
|
glLoadIdentity();
|
|
glViewport( 0, 0, (GLsizei) screenSize.x * scaleFactor, (GLsizei) screenSize.y * scaleFactor );
|
|
|
|
// Create the screen transformation
|
|
glOrtho( 0, (GLint) screenSize.x, 0, (GLsizei) screenSize.y,
|
|
-depthRange.x, -depthRange.y );
|
|
|
|
if( !isFramebufferInitialized )
|
|
{
|
|
// Prepare rendering target buffers
|
|
compositor.Initialize();
|
|
mainBuffer = compositor.CreateBuffer();
|
|
overlayBuffer = compositor.CreateBuffer();
|
|
|
|
isFramebufferInitialized = true;
|
|
}
|
|
|
|
// Disable 2D Textures
|
|
glDisable( GL_TEXTURE_2D );
|
|
|
|
// Enable the depth buffer
|
|
glEnable( GL_DEPTH_TEST );
|
|
glDepthFunc( GL_LESS );
|
|
|
|
// Setup blending, required for transparent objects
|
|
glEnable( GL_BLEND );
|
|
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
|
|
|
|
glMatrixMode( GL_MODELVIEW );
|
|
|
|
// Set up the world <-> screen transformation
|
|
ComputeWorldScreenMatrix();
|
|
GLdouble matrixData[16] = { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 };
|
|
matrixData[0] = worldScreenMatrix.m_data[0][0];
|
|
matrixData[1] = worldScreenMatrix.m_data[1][0];
|
|
matrixData[2] = worldScreenMatrix.m_data[2][0];
|
|
matrixData[4] = worldScreenMatrix.m_data[0][1];
|
|
matrixData[5] = worldScreenMatrix.m_data[1][1];
|
|
matrixData[6] = worldScreenMatrix.m_data[2][1];
|
|
matrixData[12] = worldScreenMatrix.m_data[0][2];
|
|
matrixData[13] = worldScreenMatrix.m_data[1][2];
|
|
matrixData[14] = worldScreenMatrix.m_data[2][2];
|
|
glLoadMatrixd( matrixData );
|
|
|
|
// Set defaults
|
|
SetFillColor( fillColor );
|
|
SetStrokeColor( strokeColor );
|
|
|
|
// Unbind buffers - set compositor for direct drawing
|
|
compositor.SetBuffer( OPENGL_COMPOSITOR::DIRECT_RENDERING );
|
|
|
|
// Remove all previously stored items
|
|
nonCachedManager.Clear();
|
|
overlayManager.Clear();
|
|
|
|
cachedManager.BeginDrawing();
|
|
nonCachedManager.BeginDrawing();
|
|
overlayManager.BeginDrawing();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::EndDrawing()
|
|
{
|
|
// Cached & non-cached containers are rendered to the same buffer
|
|
compositor.SetBuffer( mainBuffer );
|
|
nonCachedManager.EndDrawing();
|
|
cachedManager.EndDrawing();
|
|
|
|
// Overlay container is rendered to a different buffer
|
|
compositor.SetBuffer( overlayBuffer );
|
|
overlayManager.EndDrawing();
|
|
|
|
// Be sure that the framebuffer is not colorized (happens on specific GPU&drivers combinations)
|
|
glColor4d( 1.0, 1.0, 1.0, 1.0 );
|
|
|
|
// Draw the remaining contents, blit the rendering targets to the screen, swap the buffers
|
|
compositor.DrawBuffer( mainBuffer );
|
|
compositor.DrawBuffer( overlayBuffer );
|
|
blitCursor();
|
|
|
|
glFlush();
|
|
SwapBuffers();
|
|
|
|
delete clientDC;
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint )
|
|
{
|
|
const VECTOR2D startEndVector = aEndPoint - aStartPoint;
|
|
double lineAngle = startEndVector.Angle();
|
|
|
|
currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
|
|
|
|
drawLineQuad( aStartPoint, aEndPoint );
|
|
|
|
// Line caps
|
|
if( lineWidth > 1.0 )
|
|
{
|
|
drawFilledSemiCircle( aStartPoint, lineWidth / 2, lineAngle + M_PI / 2 );
|
|
drawFilledSemiCircle( aEndPoint, lineWidth / 2, lineAngle - M_PI / 2 );
|
|
}
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawSegment( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint,
|
|
double aWidth )
|
|
{
|
|
VECTOR2D startEndVector = aEndPoint - aStartPoint;
|
|
double lineAngle = startEndVector.Angle();
|
|
|
|
if( isFillEnabled )
|
|
{
|
|
// Filled tracks
|
|
currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
|
|
|
|
SetLineWidth( aWidth );
|
|
drawLineQuad( aStartPoint, aEndPoint );
|
|
|
|
// Draw line caps
|
|
drawFilledSemiCircle( aStartPoint, aWidth / 2, lineAngle + M_PI / 2 );
|
|
drawFilledSemiCircle( aEndPoint, aWidth / 2, lineAngle - M_PI / 2 );
|
|
}
|
|
else
|
|
{
|
|
// Outlined tracks
|
|
double lineLength = startEndVector.EuclideanNorm();
|
|
|
|
currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
|
|
|
|
Save();
|
|
|
|
currentManager->Translate( aStartPoint.x, aStartPoint.y, 0.0 );
|
|
currentManager->Rotate( lineAngle, 0.0f, 0.0f, 1.0f );
|
|
|
|
drawLineQuad( VECTOR2D( 0.0, aWidth / 2.0 ),
|
|
VECTOR2D( lineLength, aWidth / 2.0 ) );
|
|
|
|
drawLineQuad( VECTOR2D( 0.0, -aWidth / 2.0 ),
|
|
VECTOR2D( lineLength, -aWidth / 2.0 ) );
|
|
|
|
// Draw line caps
|
|
drawStrokedSemiCircle( VECTOR2D( 0.0, 0.0 ), aWidth / 2, M_PI / 2 );
|
|
drawStrokedSemiCircle( VECTOR2D( lineLength, 0.0 ), aWidth / 2, -M_PI / 2 );
|
|
|
|
Restore();
|
|
}
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawCircle( const VECTOR2D& aCenterPoint, double aRadius )
|
|
{
|
|
if( isFillEnabled )
|
|
{
|
|
currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
|
|
|
|
/* Draw a triangle that contains the circle, then shade it leaving only the circle.
|
|
* Parameters given to setShader are indices of the triangle's vertices
|
|
* (if you want to understand more, check the vertex shader source [shader.vert]).
|
|
* Shader uses this coordinates to determine if fragments are inside the circle or not.
|
|
* v2
|
|
* /\
|
|
* //\\
|
|
* v0 /_\/_\ v1
|
|
*/
|
|
currentManager->Shader( SHADER_FILLED_CIRCLE, 1.0 );
|
|
currentManager->Vertex( aCenterPoint.x - aRadius * sqrt( 3.0f ), // v0
|
|
aCenterPoint.y - aRadius, layerDepth );
|
|
|
|
currentManager->Shader( SHADER_FILLED_CIRCLE, 2.0 );
|
|
currentManager->Vertex( aCenterPoint.x + aRadius * sqrt( 3.0f ), // v1
|
|
aCenterPoint.y - aRadius, layerDepth );
|
|
|
|
currentManager->Shader( SHADER_FILLED_CIRCLE, 3.0 );
|
|
currentManager->Vertex( aCenterPoint.x, aCenterPoint.y + aRadius * 2.0f, // v2
|
|
layerDepth );
|
|
}
|
|
|
|
if( isStrokeEnabled )
|
|
{
|
|
currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
|
|
|
|
/* Draw a triangle that contains the circle, then shade it leaving only the circle.
|
|
* Parameters given to setShader are indices of the triangle's vertices
|
|
* (if you want to understand more, check the vertex shader source [shader.vert]).
|
|
* and the line width. Shader uses this coordinates to determine if fragments are
|
|
* inside the circle or not.
|
|
* v2
|
|
* /\
|
|
* //\\
|
|
* v0 /_\/_\ v1
|
|
*/
|
|
double outerRadius = aRadius + ( lineWidth / 2 );
|
|
currentManager->Shader( SHADER_STROKED_CIRCLE, 1.0, aRadius, lineWidth );
|
|
currentManager->Vertex( aCenterPoint.x - outerRadius * sqrt( 3.0f ), // v0
|
|
aCenterPoint.y - outerRadius, layerDepth );
|
|
|
|
currentManager->Shader( SHADER_STROKED_CIRCLE, 2.0, aRadius, lineWidth );
|
|
currentManager->Vertex( aCenterPoint.x + outerRadius * sqrt( 3.0f ), // v1
|
|
aCenterPoint.y - outerRadius, layerDepth );
|
|
|
|
currentManager->Shader( SHADER_STROKED_CIRCLE, 3.0, aRadius, lineWidth );
|
|
currentManager->Vertex( aCenterPoint.x, aCenterPoint.y + outerRadius * 2.0f, // v2
|
|
layerDepth );
|
|
}
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawArc( const VECTOR2D& aCenterPoint, double aRadius, double aStartAngle,
|
|
double aEndAngle )
|
|
{
|
|
if( aRadius <= 0 )
|
|
return;
|
|
|
|
// Swap the angles, if start angle is greater than end angle
|
|
SWAP( aStartAngle, >, aEndAngle );
|
|
|
|
Save();
|
|
currentManager->Translate( aCenterPoint.x, aCenterPoint.y, 0.0 );
|
|
|
|
if( isStrokeEnabled )
|
|
{
|
|
const double alphaIncrement = 2.0 * M_PI / CIRCLE_POINTS;
|
|
currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
|
|
|
|
VECTOR2D p( cos( aStartAngle ) * aRadius, sin( aStartAngle ) * aRadius );
|
|
double alpha;
|
|
|
|
for( alpha = aStartAngle + alphaIncrement; alpha <= aEndAngle; alpha += alphaIncrement )
|
|
{
|
|
VECTOR2D p_next( cos( alpha ) * aRadius, sin( alpha ) * aRadius );
|
|
DrawLine( p, p_next );
|
|
|
|
p = p_next;
|
|
}
|
|
|
|
// Draw the last missing part
|
|
if( alpha != aEndAngle )
|
|
{
|
|
VECTOR2D p_last( cos( aEndAngle ) * aRadius, sin( aEndAngle ) * aRadius );
|
|
DrawLine( p, p_last );
|
|
}
|
|
}
|
|
|
|
if( isFillEnabled )
|
|
{
|
|
const double alphaIncrement = 2 * M_PI / CIRCLE_POINTS;
|
|
double alpha;
|
|
currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
|
|
currentManager->Shader( SHADER_NONE );
|
|
|
|
// Triangle fan
|
|
for( alpha = aStartAngle; ( alpha + alphaIncrement ) < aEndAngle; )
|
|
{
|
|
currentManager->Vertex( 0.0, 0.0, 0.0 );
|
|
currentManager->Vertex( cos( alpha ) * aRadius, sin( alpha ) * aRadius, 0.0 );
|
|
alpha += alphaIncrement;
|
|
currentManager->Vertex( cos( alpha ) * aRadius, sin( alpha ) * aRadius, 0.0 );
|
|
}
|
|
|
|
// The last missing triangle
|
|
const VECTOR2D endPoint( cos( aEndAngle ) * aRadius, sin( aEndAngle ) * aRadius );
|
|
currentManager->Vertex( 0.0, 0.0, 0.0 );
|
|
currentManager->Vertex( cos( alpha ) * aRadius, sin( alpha ) * aRadius, 0.0 );
|
|
currentManager->Vertex( endPoint.x, endPoint.y, 0.0 );
|
|
}
|
|
|
|
Restore();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawRectangle( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint )
|
|
{
|
|
// Compute the diagonal points of the rectangle
|
|
VECTOR2D diagonalPointA( aEndPoint.x, aStartPoint.y );
|
|
VECTOR2D diagonalPointB( aStartPoint.x, aEndPoint.y );
|
|
|
|
// Stroke the outline
|
|
if( isStrokeEnabled )
|
|
{
|
|
currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
|
|
|
|
std::deque<VECTOR2D> pointList;
|
|
pointList.push_back( aStartPoint );
|
|
pointList.push_back( diagonalPointA );
|
|
pointList.push_back( aEndPoint );
|
|
pointList.push_back( diagonalPointB );
|
|
pointList.push_back( aStartPoint );
|
|
DrawPolyline( pointList );
|
|
}
|
|
|
|
// Fill the rectangle
|
|
if( isFillEnabled )
|
|
{
|
|
currentManager->Shader( SHADER_NONE );
|
|
currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
|
|
|
|
currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth );
|
|
currentManager->Vertex( diagonalPointA.x, diagonalPointA.y, layerDepth );
|
|
currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth );
|
|
|
|
currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth );
|
|
currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth );
|
|
currentManager->Vertex( diagonalPointB.x, diagonalPointB.y, layerDepth );
|
|
}
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawPolyline( const std::deque<VECTOR2D>& aPointList )
|
|
{
|
|
if( aPointList.empty() )
|
|
return;
|
|
|
|
currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
|
|
|
|
std::deque<VECTOR2D>::const_iterator it = aPointList.begin();
|
|
|
|
// Start from the second point
|
|
for( ++it; it != aPointList.end(); ++it )
|
|
{
|
|
const VECTOR2D startEndVector = ( *it - *( it - 1 ) );
|
|
double lineAngle = startEndVector.Angle();
|
|
|
|
drawLineQuad( *( it - 1 ), *it );
|
|
|
|
// There is no need to draw line caps on both ends of polyline's segments
|
|
drawFilledSemiCircle( *( it - 1 ), lineWidth / 2, lineAngle + M_PI / 2 );
|
|
}
|
|
|
|
// ..and now - draw the ending cap
|
|
const VECTOR2D startEndVector = ( *( it - 1 ) - *( it - 2 ) );
|
|
double lineAngle = startEndVector.Angle();
|
|
drawFilledSemiCircle( *( it - 1 ), lineWidth / 2, lineAngle - M_PI / 2 );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawPolyline( const VECTOR2D aPointList[], int aListSize )
|
|
{
|
|
currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
|
|
|
|
// Start from the second point
|
|
for( int i = 1; i < aListSize; ++i )
|
|
{
|
|
const VECTOR2D startEndVector = ( aPointList[i] - aPointList[i - 1] );
|
|
double lineAngle = startEndVector.Angle();
|
|
|
|
drawLineQuad( aPointList[i - 1], aPointList[i] );
|
|
|
|
// There is no need to draw line caps on both ends of polyline's segments
|
|
drawFilledSemiCircle( aPointList[i - 1], lineWidth / 2, lineAngle + M_PI / 2 );
|
|
}
|
|
|
|
// ..and now - draw the ending cap
|
|
const VECTOR2D startEndVector = ( aPointList[aListSize - 1] - aPointList[aListSize - 2] );
|
|
double lineAngle = startEndVector.Angle();
|
|
drawFilledSemiCircle( aPointList[aListSize - 1], lineWidth / 2, lineAngle - M_PI / 2 );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawPolygon( const std::deque<VECTOR2D>& aPointList )
|
|
{
|
|
currentManager->Shader( SHADER_NONE );
|
|
currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
|
|
|
|
// Any non convex polygon needs to be tesselated
|
|
// for this purpose the GLU standard functions are used
|
|
TessParams params = { currentManager, tessIntersects };
|
|
gluTessBeginPolygon( tesselator, ¶ms );
|
|
gluTessBeginContour( tesselator );
|
|
|
|
boost::shared_array<GLdouble> points( new GLdouble[3 * aPointList.size()] );
|
|
int v = 0;
|
|
|
|
for( std::deque<VECTOR2D>::const_iterator it = aPointList.begin(); it != aPointList.end(); ++it )
|
|
{
|
|
points[v] = it->x;
|
|
points[v + 1] = it->y;
|
|
points[v + 2] = layerDepth;
|
|
gluTessVertex( tesselator, &points[v], &points[v] );
|
|
v += 3;
|
|
}
|
|
|
|
gluTessEndContour( tesselator );
|
|
gluTessEndPolygon( tesselator );
|
|
|
|
// Free allocated intersecting points
|
|
tessIntersects.clear();
|
|
|
|
// vertexList destroyed here
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawPolygon( const VECTOR2D aPointList[], int aListSize )
|
|
{
|
|
currentManager->Shader( SHADER_NONE );
|
|
currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
|
|
|
|
// Any non convex polygon needs to be tesselated
|
|
// for this purpose the GLU standard functions are used
|
|
TessParams params = { currentManager, tessIntersects };
|
|
gluTessBeginPolygon( tesselator, ¶ms );
|
|
gluTessBeginContour( tesselator );
|
|
|
|
boost::shared_array<GLdouble> points( new GLdouble[3 * aListSize] );
|
|
int v = 0;
|
|
const VECTOR2D* ptr = aPointList;
|
|
|
|
for( int i = 0; i < aListSize; ++i )
|
|
{
|
|
points[v] = ptr->x;
|
|
points[v + 1] = ptr->y;
|
|
points[v + 2] = layerDepth;
|
|
gluTessVertex( tesselator, &points[v], &points[v] );
|
|
++ptr;
|
|
v += 3;
|
|
}
|
|
|
|
gluTessEndContour( tesselator );
|
|
gluTessEndPolygon( tesselator );
|
|
|
|
// Free allocated intersecting points
|
|
tessIntersects.clear();
|
|
|
|
// vertexList destroyed here
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawCurve( const VECTOR2D& aStartPoint, const VECTOR2D& aControlPointA,
|
|
const VECTOR2D& aControlPointB, const VECTOR2D& aEndPoint )
|
|
{
|
|
// FIXME The drawing quality needs to be improved
|
|
// FIXME Perhaps choose a quad/triangle strip instead?
|
|
// FIXME Brute force method, use a better (recursive?) algorithm
|
|
|
|
std::deque<VECTOR2D> pointList;
|
|
|
|
double t = 0.0;
|
|
double dt = 1.0 / (double) CURVE_POINTS;
|
|
|
|
for( int i = 0; i <= CURVE_POINTS; i++ )
|
|
{
|
|
double omt = 1.0 - t;
|
|
double omt2 = omt * omt;
|
|
double omt3 = omt * omt2;
|
|
double t2 = t * t;
|
|
double t3 = t * t2;
|
|
|
|
VECTOR2D vertex = omt3 * aStartPoint + 3.0 * t * omt2 * aControlPointA
|
|
+ 3.0 * t2 * omt * aControlPointB + t3 * aEndPoint;
|
|
|
|
pointList.push_back( vertex );
|
|
|
|
t += dt;
|
|
}
|
|
|
|
DrawPolyline( pointList );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ResizeScreen( int aWidth, int aHeight )
|
|
{
|
|
screenSize = VECTOR2I( aWidth, aHeight );
|
|
|
|
#ifdef RETINA_OPENGL_PATCH
|
|
const float scaleFactor = GetBackingScaleFactor();
|
|
#else
|
|
const float scaleFactor = 1.0f;
|
|
#endif
|
|
|
|
// Resize framebuffers
|
|
compositor.Resize( aWidth * scaleFactor, aHeight * scaleFactor );
|
|
isFramebufferInitialized = false;
|
|
|
|
wxGLCanvas::SetSize( aWidth, aHeight );
|
|
}
|
|
|
|
|
|
bool OPENGL_GAL::Show( bool aShow )
|
|
{
|
|
bool s = wxGLCanvas::Show( aShow );
|
|
|
|
if( aShow )
|
|
wxGLCanvas::Raise();
|
|
|
|
return s;
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Flush()
|
|
{
|
|
glFlush();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ClearScreen( const COLOR4D& aColor )
|
|
{
|
|
// Clear screen
|
|
glClearColor( aColor.r, aColor.g, aColor.b, aColor.a );
|
|
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Transform( const MATRIX3x3D& aTransformation )
|
|
{
|
|
GLdouble matrixData[16] = { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 };
|
|
|
|
matrixData[0] = aTransformation.m_data[0][0];
|
|
matrixData[1] = aTransformation.m_data[1][0];
|
|
matrixData[2] = aTransformation.m_data[2][0];
|
|
matrixData[4] = aTransformation.m_data[0][1];
|
|
matrixData[5] = aTransformation.m_data[1][1];
|
|
matrixData[6] = aTransformation.m_data[2][1];
|
|
matrixData[12] = aTransformation.m_data[0][2];
|
|
matrixData[13] = aTransformation.m_data[1][2];
|
|
matrixData[14] = aTransformation.m_data[2][2];
|
|
|
|
glMultMatrixd( matrixData );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Rotate( double aAngle )
|
|
{
|
|
currentManager->Rotate( aAngle, 0.0f, 0.0f, 1.0f );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Translate( const VECTOR2D& aVector )
|
|
{
|
|
currentManager->Translate( aVector.x, aVector.y, 0.0f );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Scale( const VECTOR2D& aScale )
|
|
{
|
|
currentManager->Scale( aScale.x, aScale.y, 0.0f );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Save()
|
|
{
|
|
currentManager->PushMatrix();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::Restore()
|
|
{
|
|
currentManager->PopMatrix();
|
|
}
|
|
|
|
|
|
int OPENGL_GAL::BeginGroup()
|
|
{
|
|
isGrouping = true;
|
|
|
|
boost::shared_ptr<VERTEX_ITEM> newItem( new VERTEX_ITEM( cachedManager ) );
|
|
int groupNumber = getNewGroupNumber();
|
|
groups.insert( std::make_pair( groupNumber, newItem ) );
|
|
|
|
return groupNumber;
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::EndGroup()
|
|
{
|
|
cachedManager.FinishItem();
|
|
isGrouping = false;
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawGroup( int aGroupNumber )
|
|
{
|
|
cachedManager.DrawItem( *groups[aGroupNumber] );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ChangeGroupColor( int aGroupNumber, const COLOR4D& aNewColor )
|
|
{
|
|
cachedManager.ChangeItemColor( *groups[aGroupNumber], aNewColor );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ChangeGroupDepth( int aGroupNumber, int aDepth )
|
|
{
|
|
cachedManager.ChangeItemDepth( *groups[aGroupNumber], aDepth );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DeleteGroup( int aGroupNumber )
|
|
{
|
|
// Frees memory in the container as well
|
|
groups.erase( aGroupNumber );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ClearCache()
|
|
{
|
|
groups.clear();
|
|
cachedManager.Clear();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::SaveScreen()
|
|
{
|
|
wxASSERT_MSG( false, wxT( "Not implemented yet" ) );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::RestoreScreen()
|
|
{
|
|
wxASSERT_MSG( false, wxT( "Not implemented yet" ) );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::SetTarget( RENDER_TARGET aTarget )
|
|
{
|
|
switch( aTarget )
|
|
{
|
|
default:
|
|
case TARGET_CACHED:
|
|
currentManager = &cachedManager;
|
|
break;
|
|
|
|
case TARGET_NONCACHED:
|
|
currentManager = &nonCachedManager;
|
|
break;
|
|
|
|
case TARGET_OVERLAY:
|
|
currentManager = &overlayManager;
|
|
break;
|
|
}
|
|
|
|
currentTarget = aTarget;
|
|
}
|
|
|
|
|
|
RENDER_TARGET OPENGL_GAL::GetTarget() const
|
|
{
|
|
return currentTarget;
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::ClearTarget( RENDER_TARGET aTarget )
|
|
{
|
|
// Save the current state
|
|
unsigned int oldTarget = compositor.GetBuffer();
|
|
|
|
switch( aTarget )
|
|
{
|
|
// Cached and noncached items are rendered to the same buffer
|
|
default:
|
|
case TARGET_CACHED:
|
|
case TARGET_NONCACHED:
|
|
compositor.SetBuffer( mainBuffer );
|
|
break;
|
|
|
|
case TARGET_OVERLAY:
|
|
compositor.SetBuffer( overlayBuffer );
|
|
break;
|
|
}
|
|
|
|
compositor.ClearBuffer();
|
|
|
|
// Restore the previous state
|
|
compositor.SetBuffer( oldTarget );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::DrawCursor( const VECTOR2D& aCursorPosition )
|
|
{
|
|
// Now we should only store the position of the mouse cursor
|
|
// The real drawing routines are in blitCursor()
|
|
VECTOR2D screenCursor = worldScreenMatrix * aCursorPosition;
|
|
|
|
cursorPosition = screenWorldMatrix * VECTOR2D( screenCursor.x, screenSize.y - screenCursor.y );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawGridLine( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint )
|
|
{
|
|
compositor.SetBuffer( mainBuffer );
|
|
|
|
// We do not need a very precise comparison here (the lineWidth is set by GAL::DrawGrid())
|
|
if( fabs( lineWidth - 2.0 * gridLineWidth / worldScale ) < 0.1 )
|
|
glLineWidth( 1.0 );
|
|
else
|
|
glLineWidth( 2.0 );
|
|
|
|
glColor4d( gridColor.r, gridColor.g, gridColor.b, gridColor.a );
|
|
|
|
glBegin( GL_LINES );
|
|
glVertex3d( aStartPoint.x, aStartPoint.y, layerDepth );
|
|
glVertex3d( aEndPoint.x, aEndPoint.y, layerDepth );
|
|
glEnd();
|
|
|
|
// Restore the default color, so textures will be drawn properly
|
|
glColor4d( 1.0, 1.0, 1.0, 1.0 );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawLineQuad( const VECTOR2D& aStartPoint, const VECTOR2D& aEndPoint )
|
|
{
|
|
/* Helper drawing: ____--- v3 ^
|
|
* ____---- ... \ \
|
|
* ____---- ... \ end \
|
|
* v1 ____---- ... ____---- \ width
|
|
* ---- ...___---- \ \
|
|
* \ ___...-- \ v
|
|
* \ ____----... ____---- v2
|
|
* ---- ... ____----
|
|
* start \ ... ____----
|
|
* \... ____----
|
|
* ----
|
|
* v0
|
|
* dots mark triangles' hypotenuses
|
|
*/
|
|
|
|
VECTOR2D startEndVector = aEndPoint - aStartPoint;
|
|
double lineLength = startEndVector.EuclideanNorm();
|
|
|
|
if( lineLength <= 0.0 )
|
|
return;
|
|
|
|
double scale = 0.5 * lineWidth / lineLength;
|
|
|
|
// The perpendicular vector also needs transformations
|
|
glm::vec4 vector = currentManager->GetTransformation() *
|
|
glm::vec4( -startEndVector.y * scale, startEndVector.x * scale, 0.0, 0.0 );
|
|
|
|
// Line width is maintained by the vertex shader
|
|
currentManager->Shader( SHADER_LINE, vector.x, vector.y, lineWidth );
|
|
currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth ); // v0
|
|
|
|
currentManager->Shader( SHADER_LINE, -vector.x, -vector.y, lineWidth );
|
|
currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth ); // v1
|
|
|
|
currentManager->Shader( SHADER_LINE, -vector.x, -vector.y, lineWidth );
|
|
currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth ); // v3
|
|
|
|
currentManager->Shader( SHADER_LINE, vector.x, vector.y, lineWidth );
|
|
currentManager->Vertex( aStartPoint.x, aStartPoint.y, layerDepth ); // v0
|
|
|
|
currentManager->Shader( SHADER_LINE, -vector.x, -vector.y, lineWidth );
|
|
currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth ); // v3
|
|
|
|
currentManager->Shader( SHADER_LINE, vector.x, vector.y, lineWidth );
|
|
currentManager->Vertex( aEndPoint.x, aEndPoint.y, layerDepth ); // v2
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawSemiCircle( const VECTOR2D& aCenterPoint, double aRadius, double aAngle )
|
|
{
|
|
if( isFillEnabled )
|
|
{
|
|
currentManager->Color( fillColor.r, fillColor.g, fillColor.b, fillColor.a );
|
|
drawFilledSemiCircle( aCenterPoint, aRadius, aAngle );
|
|
}
|
|
|
|
if( isStrokeEnabled )
|
|
{
|
|
currentManager->Color( strokeColor.r, strokeColor.g, strokeColor.b, strokeColor.a );
|
|
drawStrokedSemiCircle( aCenterPoint, aRadius, aAngle );
|
|
}
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawFilledSemiCircle( const VECTOR2D& aCenterPoint, double aRadius,
|
|
double aAngle )
|
|
{
|
|
Save();
|
|
currentManager->Translate( aCenterPoint.x, aCenterPoint.y, 0.0f );
|
|
currentManager->Rotate( aAngle, 0.0f, 0.0f, 1.0f );
|
|
|
|
/* Draw a triangle that contains the semicircle, then shade it to leave only
|
|
* the semicircle. Parameters given to setShader are indices of the triangle's vertices
|
|
* (if you want to understand more, check the vertex shader source [shader.vert]).
|
|
* Shader uses these coordinates to determine if fragments are inside the semicircle or not.
|
|
* v2
|
|
* /\
|
|
* /__\
|
|
* v0 //__\\ v1
|
|
*/
|
|
currentManager->Shader( SHADER_FILLED_CIRCLE, 4.0f );
|
|
currentManager->Vertex( -aRadius * 3.0f / sqrt( 3.0f ), 0.0f, layerDepth ); // v0
|
|
|
|
currentManager->Shader( SHADER_FILLED_CIRCLE, 5.0f );
|
|
currentManager->Vertex( aRadius * 3.0f / sqrt( 3.0f ), 0.0f, layerDepth ); // v1
|
|
|
|
currentManager->Shader( SHADER_FILLED_CIRCLE, 6.0f );
|
|
currentManager->Vertex( 0.0f, aRadius * 2.0f, layerDepth ); // v2
|
|
|
|
Restore();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::drawStrokedSemiCircle( const VECTOR2D& aCenterPoint, double aRadius,
|
|
double aAngle )
|
|
{
|
|
double outerRadius = aRadius + ( lineWidth / 2 );
|
|
|
|
Save();
|
|
currentManager->Translate( aCenterPoint.x, aCenterPoint.y, 0.0f );
|
|
currentManager->Rotate( aAngle, 0.0f, 0.0f, 1.0f );
|
|
|
|
/* Draw a triangle that contains the semicircle, then shade it to leave only
|
|
* the semicircle. Parameters given to setShader are indices of the triangle's vertices
|
|
* (if you want to understand more, check the vertex shader source [shader.vert]), the
|
|
* radius and the line width. Shader uses these coordinates to determine if fragments are
|
|
* inside the semicircle or not.
|
|
* v2
|
|
* /\
|
|
* /__\
|
|
* v0 //__\\ v1
|
|
*/
|
|
currentManager->Shader( SHADER_STROKED_CIRCLE, 4.0f, aRadius, lineWidth );
|
|
currentManager->Vertex( -outerRadius * 3.0f / sqrt( 3.0f ), 0.0f, layerDepth ); // v0
|
|
|
|
currentManager->Shader( SHADER_STROKED_CIRCLE, 5.0f, aRadius, lineWidth );
|
|
currentManager->Vertex( outerRadius * 3.0f / sqrt( 3.0f ), 0.0f, layerDepth ); // v1
|
|
|
|
currentManager->Shader( SHADER_STROKED_CIRCLE, 6.0f, aRadius, lineWidth );
|
|
currentManager->Vertex( 0.0f, outerRadius * 2.0f, layerDepth ); // v2
|
|
|
|
Restore();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::onPaint( wxPaintEvent& WXUNUSED( aEvent ) )
|
|
{
|
|
PostPaint();
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::skipMouseEvent( wxMouseEvent& aEvent )
|
|
{
|
|
// Post the mouse event to the event listener registered in constructor, if any
|
|
if( mouseListener )
|
|
wxPostEvent( mouseListener, aEvent );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::blitCursor()
|
|
{
|
|
if( !isCursorEnabled )
|
|
return;
|
|
|
|
compositor.SetBuffer( OPENGL_COMPOSITOR::DIRECT_RENDERING );
|
|
|
|
VECTOR2D cursorBegin = cursorPosition - cursorSize / ( 2 * worldScale );
|
|
VECTOR2D cursorEnd = cursorPosition + cursorSize / ( 2 * worldScale );
|
|
VECTOR2D cursorCenter = ( cursorBegin + cursorEnd ) / 2;
|
|
|
|
glDisable( GL_TEXTURE_2D );
|
|
glLineWidth( 1.0 );
|
|
glColor4d( cursorColor.r, cursorColor.g, cursorColor.b, cursorColor.a );
|
|
|
|
glBegin( GL_LINES );
|
|
glVertex2d( cursorCenter.x, cursorBegin.y );
|
|
glVertex2d( cursorCenter.x, cursorEnd.y );
|
|
|
|
glVertex2d( cursorBegin.x, cursorCenter.y );
|
|
glVertex2d( cursorEnd.x, cursorCenter.y );
|
|
glEnd();
|
|
}
|
|
|
|
|
|
unsigned int OPENGL_GAL::getNewGroupNumber()
|
|
{
|
|
wxASSERT_MSG( groups.size() < std::numeric_limits<unsigned int>::max(),
|
|
wxT( "There are no free slots to store a group" ) );
|
|
|
|
while( groups.find( groupCounter ) != groups.end() )
|
|
{
|
|
groupCounter++;
|
|
}
|
|
|
|
return groupCounter++;
|
|
}
|
|
|
|
|
|
bool OPENGL_GAL::runTest()
|
|
{
|
|
wxDialog dlgtest( GetParent(), -1, wxT( "opengl test" ), wxPoint( 50, 50 ),
|
|
wxDLG_UNIT( GetParent(), wxSize( 50, 50 ) ) );
|
|
OPENGL_TEST* test = new OPENGL_TEST( &dlgtest, this );
|
|
|
|
dlgtest.Raise(); // on Linux, on some windows managers (Unity for instance) this is needed to actually show the dialog
|
|
dlgtest.ShowModal();
|
|
bool result = test->IsOk();
|
|
|
|
if( !result )
|
|
throw std::runtime_error( test->GetError() );
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
OPENGL_GAL::OPENGL_TEST::OPENGL_TEST( wxDialog* aParent, OPENGL_GAL* aGal ) :
|
|
wxGLCanvas( aParent, wxID_ANY, glAttributes, wxDefaultPosition,
|
|
wxDefaultSize, 0, wxT( "GLCanvas" ) ),
|
|
m_parent( aParent ), m_gal( aGal ), m_tested( false ), m_result( false )
|
|
{
|
|
m_timeoutTimer.SetOwner( this );
|
|
Connect( wxEVT_PAINT, wxPaintEventHandler( OPENGL_GAL::OPENGL_TEST::Render ) );
|
|
Connect( wxEVT_TIMER, wxTimerEventHandler( OPENGL_GAL::OPENGL_TEST::OnTimeout ) );
|
|
m_parent->Connect( wxEVT_PAINT, wxPaintEventHandler( OPENGL_GAL::OPENGL_TEST::OnDialogPaint ), NULL, this );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::OPENGL_TEST::Render( wxPaintEvent& WXUNUSED( aEvent ) )
|
|
{
|
|
if( !m_tested )
|
|
{
|
|
if( !IsShownOnScreen() )
|
|
return;
|
|
|
|
m_timeoutTimer.Stop();
|
|
m_result = true; // Assume everything is fine, until proven otherwise
|
|
|
|
// One test is enough - close the testing dialog when the test is finished
|
|
Disconnect( wxEVT_PAINT, wxPaintEventHandler( OPENGL_GAL::OPENGL_TEST::Render ) );
|
|
CallAfter( boost::bind( &wxDialog::EndModal, m_parent, wxID_NONE ) );
|
|
|
|
SetCurrent( *OPENGL_GAL::glContext );
|
|
GLenum err = glewInit();
|
|
|
|
if( GLEW_OK != err )
|
|
{
|
|
error( (const char*) glewGetErrorString( err ) );
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
wxLogDebug( wxString( wxT( "Status: Using GLEW " ) ) +
|
|
FROM_UTF8( (char*) glewGetString( GLEW_VERSION ) ) );
|
|
}
|
|
|
|
// Check the OpenGL version (minimum 2.1 is required)
|
|
if( GLEW_VERSION_2_1 )
|
|
{
|
|
wxLogInfo( wxT( "OpenGL 2.1 supported." ) );
|
|
}
|
|
else
|
|
{
|
|
error( "OpenGL 2.1 or higher is required!" );
|
|
return;
|
|
}
|
|
|
|
// Framebuffers have to be supported
|
|
if( !GLEW_EXT_framebuffer_object )
|
|
{
|
|
error( "Framebuffer objects are not supported!" );
|
|
return;
|
|
}
|
|
|
|
// Vertex buffer has to be supported
|
|
if( !GLEW_ARB_vertex_buffer_object )
|
|
{
|
|
error( "Vertex buffer objects are not supported!" );
|
|
return;
|
|
}
|
|
|
|
// Prepare shaders
|
|
if( !m_gal->shader.LoadBuiltinShader( 0, SHADER_TYPE_VERTEX ) )
|
|
{
|
|
error( "Cannot compile vertex shader!" );
|
|
return;
|
|
}
|
|
|
|
if( !m_gal->shader.LoadBuiltinShader( 1, SHADER_TYPE_FRAGMENT ) )
|
|
{
|
|
error( "Cannot compile fragment shader!" );
|
|
return;
|
|
}
|
|
|
|
if( !m_gal->shader.Link() )
|
|
{
|
|
error( "Cannot link the shaders!" );
|
|
return;
|
|
}
|
|
|
|
m_tested = true;
|
|
}
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::OPENGL_TEST::OnTimeout( wxTimerEvent& aEvent )
|
|
{
|
|
error( "Could not create OpenGL canvas" );
|
|
m_parent->EndModal( wxID_NONE );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::OPENGL_TEST::OnDialogPaint( wxPaintEvent& aEvent )
|
|
{
|
|
// GL canvas may never appear on the screen (e.g. due to missing GL extensions), and the test
|
|
// will not be run. Therefore give at most a second to perform the test, otherwise we conclude
|
|
// it has failed.
|
|
// Also, wxWidgets OnShow event is triggered before a window is shown, therefore here we use
|
|
// OnPaint event, which is executed when a window is actually visible.
|
|
m_timeoutTimer.StartOnce( 1000 );
|
|
}
|
|
|
|
|
|
void OPENGL_GAL::OPENGL_TEST::error( const std::string& aError )
|
|
{
|
|
m_timeoutTimer.Stop();
|
|
m_result = false;
|
|
m_tested = true;
|
|
m_error = aError;
|
|
}
|
|
|
|
// ------------------------------------- // Callback functions for the tesselator // ------------------------------------- // Compare Redbook Chapter 11
|
|
void CALLBACK VertexCallback( GLvoid* aVertexPtr, void* aData )
|
|
{
|
|
GLdouble* vertex = static_cast<GLdouble*>( aVertexPtr );
|
|
OPENGL_GAL::TessParams* param = static_cast<OPENGL_GAL::TessParams*>( aData );
|
|
VERTEX_MANAGER* vboManager = param->vboManager;
|
|
|
|
if( vboManager )
|
|
vboManager->Vertex( vertex[0], vertex[1], vertex[2] );
|
|
}
|
|
|
|
|
|
void CALLBACK CombineCallback( GLdouble coords[3],
|
|
GLdouble* vertex_data[4],
|
|
GLfloat weight[4], GLdouble** dataOut, void* aData )
|
|
{
|
|
GLdouble* vertex = new GLdouble[3];
|
|
OPENGL_GAL::TessParams* param = static_cast<OPENGL_GAL::TessParams*>( aData );
|
|
|
|
// Save the pointer so we can delete it later
|
|
param->intersectPoints.push_back( boost::shared_array<GLdouble>( vertex ) );
|
|
|
|
memcpy( vertex, coords, 3 * sizeof(GLdouble) );
|
|
|
|
*dataOut = vertex;
|
|
}
|
|
|
|
|
|
void CALLBACK EdgeCallback( GLboolean aEdgeFlag )
|
|
{
|
|
// This callback is needed to force GLU tesselator to use triangles only
|
|
}
|
|
|
|
|
|
void CALLBACK ErrorCallback( GLenum aErrorCode )
|
|
{
|
|
//throw std::runtime_error( std::string( "Tessellation error: " ) +
|
|
//std::string( (const char*) gluErrorString( aErrorCode ) );
|
|
}
|
|
|
|
|
|
static void InitTesselatorCallbacks( GLUtesselator* aTesselator )
|
|
{
|
|
gluTessCallback( aTesselator, GLU_TESS_VERTEX_DATA, ( void (CALLBACK*)() )VertexCallback );
|
|
gluTessCallback( aTesselator, GLU_TESS_COMBINE_DATA, ( void (CALLBACK*)() )CombineCallback );
|
|
gluTessCallback( aTesselator, GLU_TESS_EDGE_FLAG, ( void (CALLBACK*)() )EdgeCallback );
|
|
gluTessCallback( aTesselator, GLU_TESS_ERROR, ( void (CALLBACK*)() )ErrorCallback );
|
|
}
|