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6cd56f6e0fc7ff60ca6c7bfb30a4d1eaa0fa5eef
wxWidgets/src/mgl/dc.cpp
Francesco Montorsi 89efaf2b65 change generic ints to enums in wxDC (closes #9959) 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57907 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2009-01-08 14:21:53 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: src/mgl/dc.cpp
// Purpose: wxDC class
// Author: Vaclav Slavik
// Created: 2001/03/09
// RCS-ID: $Id$
// Copyright: (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ===========================================================================
// declarations
// ===========================================================================
// ---------------------------------------------------------------------------
// headers
// ---------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/dc.h"
#include "wx/dcmemory.h"
#include "wx/log.h"
#endif
#include "wx/fontutil.h"
#include "wx/encinfo.h"
#include "wx/fontmap.h"
#include "wx/mgl/private.h"
#include <string.h>
#include <mgraph.hpp>
//-----------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------
const double RAD2DEG = 180.0 / M_PI;
//-----------------------------------------------------------------------------
// pens data:
//-----------------------------------------------------------------------------
const ushort STIPPLE_wxDOT = 0x5555/* - - - - - - - -*/;
const ushort STIPPLE_wxLONG_DASH = 0xF0F0/* ---- ----*/;
const ushort STIPPLE_wxSHORT_DASH = 0xCCCC/*-- -- -- -- */;
const ushort STIPPLE_wxDOT_DASH = 0x3939/* --- - --- -*/;
const ushort STIPPLE_wxSOLID = 0xFFFF/*----------------*/;
#define PATTERN_ROW(b7,b6,b5,b4,b3,b2,b1,b0) \
((b7 << 7) | (b6 << 6) | (b5 << 5) | (b4 << 4) | \
(b3 << 3) | (b2 << 2) | (b1 << 1) | b0)
static pattern_t PATTERN_wxFDIAGONAL_HATCH = {{
PATTERN_ROW(1,0,0,0,0,0,0,0),
PATTERN_ROW(0,1,0,0,0,0,0,0),
PATTERN_ROW(0,0,1,0,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,0,1,0,0,0),
PATTERN_ROW(0,0,0,0,0,1,0,0),
PATTERN_ROW(0,0,0,0,0,0,1,0),
PATTERN_ROW(0,0,0,0,0,0,0,1),
}};
static pattern_t PATTERN_wxCROSSDIAG_HATCH = {{
PATTERN_ROW(1,0,0,0,0,0,0,1),
PATTERN_ROW(0,1,0,0,0,0,1,0),
PATTERN_ROW(0,0,1,0,0,1,0,0),
PATTERN_ROW(0,0,0,1,1,0,0,0),
PATTERN_ROW(0,0,0,1,1,0,0,0),
PATTERN_ROW(0,0,1,0,0,1,0,0),
PATTERN_ROW(0,1,0,0,0,0,1,0),
PATTERN_ROW(1,0,0,0,0,0,0,1),
}};
static pattern_t PATTERN_wxBDIAGONAL_HATCH = {{
PATTERN_ROW(0,0,0,0,0,0,0,1),
PATTERN_ROW(0,0,0,0,0,0,1,0),
PATTERN_ROW(0,0,0,0,0,1,0,0),
PATTERN_ROW(0,0,0,0,1,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,1,0,0,0,0,0),
PATTERN_ROW(0,1,0,0,0,0,0,0),
PATTERN_ROW(1,0,0,0,0,0,0,0),
}};
static pattern_t PATTERN_wxCROSS_HATCH = {{
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(1,1,1,1,1,1,1,1),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
}};
static pattern_t PATTERN_wxHORIZONTAL_HATCH = {{
PATTERN_ROW(0,0,0,0,0,0,0,0),
PATTERN_ROW(0,0,0,0,0,0,0,0),
PATTERN_ROW(0,0,0,0,0,0,0,0),
PATTERN_ROW(1,1,1,1,1,1,1,1),
PATTERN_ROW(0,0,0,0,0,0,0,0),
PATTERN_ROW(0,0,0,0,0,0,0,0),
PATTERN_ROW(0,0,0,0,0,0,0,0),
PATTERN_ROW(0,0,0,0,0,0,0,0),
}};
static pattern_t PATTERN_wxVERTICAL_HATCH = {{
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
PATTERN_ROW(0,0,0,1,0,0,0,0),
}};
#undef PATTERN_ROW
//-----------------------------------------------------------------------------
// wxDC
//-----------------------------------------------------------------------------
IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
// Default constructor
wxDC::wxDC()
{
m_isMemDC = false;
m_MGLDC = NULL;
m_OwnsMGLDC = false;
m_ok = false; // must call SetMGLDevCtx() before using it
m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
(double)wxGetDisplaySizeMM().GetWidth();
m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
(double)wxGetDisplaySizeMM().GetHeight();
m_pen = *wxBLACK_PEN;
m_font = *wxNORMAL_FONT;
m_brush = *wxWHITE_BRUSH;
m_penOfsX = m_penOfsY = 0;
m_penSelected = m_brushSelected = false;
m_downloadedPatterns[0] = m_downloadedPatterns[1] = false;
m_mglFont = NULL;
}
wxDC::~wxDC()
{
if (m_OwnsMGLDC)
delete m_MGLDC;
}
void wxDC::SetMGLDC(MGLDevCtx *mgldc, bool OwnsMGLDC)
{
if ( m_OwnsMGLDC && m_MGLDC )
delete m_MGLDC;
m_MGLDC = mgldc;
m_OwnsMGLDC = OwnsMGLDC;
m_ok = true;
if ( !m_globalClippingRegion.IsNull() )
SetClippingRegion(m_globalClippingRegion);
InitializeMGLDC();
}
void wxDC::InitializeMGLDC()
{
if ( GetDepth() > 8 )
{
wxCurrentDCSwitcher switcher(m_MGLDC); // will go away with MGL6
m_MGLDC->setFontBlendMode(MGL_AA_RGBBLEND);
}
}
// ---------------------------------------------------------------------------
// clipping
// ---------------------------------------------------------------------------
#define DO_SET_CLIPPING_BOX(rg) \
{ \
wxRect rect = rg.GetBox(); \
m_clipX1 = (wxCoord) XDEV2LOG(rect.GetLeft()); \
m_clipY1 = (wxCoord) YDEV2LOG(rect.GetTop()); \
m_clipX2 = (wxCoord) XDEV2LOG(rect.GetRight()); \
m_clipY2 = (wxCoord) YDEV2LOG(rect.GetBottom()); \
}
void wxDC::DoSetClippingRegion(wxCoord cx, wxCoord cy, wxCoord cw, wxCoord ch)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxRect rect(XLOG2DEV(cx), YLOG2DEV(cy), XLOG2DEVREL(cw), YLOG2DEVREL(ch));
if ( !m_currentClippingRegion.IsNull() )
m_currentClippingRegion.Intersect(rect);
else
m_currentClippingRegion.Union(rect);
m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
m_clipping = true;
DO_SET_CLIPPING_BOX(m_currentClippingRegion)
}
void wxDC::DoSetDeviceClippingRegion(const wxRegion& region)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
if ( region.IsEmpty() )
{
DestroyClippingRegion();
return;
}
wxRegion rg(region);
// check if the DC is scaled or moved, and if yes, then
// convert rg to device coordinates:
if ( m_deviceOriginX != 0 || m_deviceOriginY != 0 ||
m_logicalOriginX != 0 || m_logicalOriginY != 0 ||
XLOG2DEVREL(500) != 500 || YLOG2DEVREL(500) != 500 )
{
region_t *mrg = rg.GetMGLRegion().rgnPointer();
span_t *s;
segment_t *p;
for (s = mrg->spans; s; s = s->next)
{
s->y = YLOG2DEV(s->y);
for (p = s->seg; p; p = p->next)
p->x = XLOG2DEV(p->x);
}
}
if ( !m_currentClippingRegion.IsNull() )
m_currentClippingRegion.Intersect(rg);
else
m_currentClippingRegion.Union(rg);
m_MGLDC->setClipRegion(m_currentClippingRegion.GetMGLRegion());
m_clipping = true;
DO_SET_CLIPPING_BOX(m_currentClippingRegion)
}
void wxDC::DestroyClippingRegion()
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
if ( !m_globalClippingRegion.IsNull() )
{
m_MGLDC->setClipRegion(m_globalClippingRegion.GetMGLRegion());
m_currentClippingRegion = m_globalClippingRegion;
m_clipping = true;
}
else
{
m_MGLDC->setClipRect(MGLRect(0, 0, m_MGLDC->sizex()+1, m_MGLDC->sizey()+1));
ResetClipping();
m_currentClippingRegion.Clear();
}
}
// ---------------------------------------------------------------------------
// query capabilities
// ---------------------------------------------------------------------------
bool wxDC::CanDrawBitmap() const
{
return true;
}
bool wxDC::CanGetTextExtent() const
{
return true;
}
int wxDC::GetDepth() const
{
return m_MGLDC->getBitsPerPixel();
}
// ---------------------------------------------------------------------------
// drawing
// ---------------------------------------------------------------------------
void wxDC::Clear()
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( m_backgroundBrush.GetStyle() != wxTRANSPARENT )
{
int w, h;
wxBrush oldb = m_brush;
SetBrush(m_backgroundBrush);
SelectBrush();
GetSize(&w, &h);
m_MGLDC->fillRect(0, 0, w, h);
SetBrush(oldb);
}
}
extern bool wxDoFloodFill(wxDC *dc, wxCoord x, wxCoord y,
const wxColour & col, wxFloodFillStyle style);
bool wxDC::DoFloodFill(wxCoord x, wxCoord y,
const wxColour& col, wxFloodFillStyle style)
{
return wxDoFloodFill(this, x, y, col, style);
}
bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
{
wxCHECK_MSG( col, false, _T("NULL colour parameter in wxDC::GetPixel"));
uchar r, g, b;
m_MGLDC->unpackColorFast(m_MGLDC->getPixel(XLOG2DEV(x), YLOG2DEV(y)),
r, g, b);
col->Set(r, g, b);
return true;
}
void wxDC::DoCrossHair(wxCoord x, wxCoord y)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
int w = 0;
int h = 0;
GetSize(&w, &h);
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( !m_penSelected )
SelectPen();
wxCoord xx = XLOG2DEV(x);
wxCoord yy = YLOG2DEV(y);
m_MGLDC->line(m_penOfsX, yy + m_penOfsY, w-1 + m_penOfsX, yy + m_penOfsY);
m_MGLDC->line(xx + m_penOfsX, m_penOfsY, x + m_penOfsX, h-1 + m_penOfsY);
CalcBoundingBox(0, 0);
CalcBoundingBox(w, h);
}
}
void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( !m_penSelected )
SelectPen();
m_MGLDC->lineExt(XLOG2DEV(x1) + m_penOfsX, YLOG2DEV(y1) + m_penOfsY,
XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY,FALSE);
CalcBoundingBox(x1, y1);
CalcBoundingBox(x2, y2);
}
}
// Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
// and ending at (x2, y2)
void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
wxCoord x2, wxCoord y2,
wxCoord xc, wxCoord yc)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxCoord xx1 = XLOG2DEV(x1);
wxCoord yy1 = YLOG2DEV(y1);
wxCoord xx2 = XLOG2DEV(x2);
wxCoord yy2 = YLOG2DEV(y2);
wxCoord xxc = XLOG2DEV(xc);
wxCoord yyc = YLOG2DEV(yc);
double dx = xx1 - xxc;
double dy = yy1 - yyc;
double radius = sqrt((double)(dx*dx+dy*dy));
wxCoord r = (wxCoord)radius;
double radius1, radius2;
if (xx1 == xx2 && yy1 == yy2)
{
radius1 = 0.0;
radius2 = 360.0;
}
else if (radius == 0.0)
{
radius1 = radius2 = 0.0;
}
else
{
radius1 = (xx1 - xxc == 0) ?
(yy1 - yyc < 0) ? 90.0 : -90.0 :
-atan2(double(yy1-yyc), double(xx1-xxc)) * RAD2DEG;
radius2 = (xx2 - xxc == 0) ?
(yy2 - yyc < 0) ? 90.0 : -90.0 :
-atan2(double(yy2-yyc), double(xx2-xxc)) * RAD2DEG;
}
wxCoord alpha1 = wxCoord(radius1);
wxCoord alpha2 = alpha1 + wxCoord(radius2 - radius1);
while (alpha2 <= 0) alpha2 += 360;
while (alpha1 > 360) alpha1 -= 360;
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( m_brush.GetStyle() != wxTRANSPARENT )
{
if ( !m_brushSelected )
SelectBrush();
m_MGLDC->fillEllipseArc(xxc, yyc, r, r, alpha1, alpha2);
}
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
if ( !m_penSelected )
SelectPen();
m_MGLDC->ellipseArc(xxc + m_penOfsX, yyc + m_penOfsY, r, r, alpha1, alpha2);
}
CalcBoundingBox(xc - r, yc - r);
CalcBoundingBox(xc + r, yc + r);
}
void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( !m_penSelected )
SelectPen();
m_MGLDC->pixel(XLOG2DEV(x), YLOG2DEV(y));
CalcBoundingBox(x, y);
}
}
void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,wxPolygonFillMode WXUNUSED(fillStyle))
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxCoord xxoffset = XLOG2DEVREL(xoffset),
yyoffset = YLOG2DEVREL(yoffset);
MGLPoint *cpoints = new MGLPoint[n+1];
for (int i = 0; i < n; i++)
{
CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
cpoints[i].x = (int)(XLOG2DEV(points[i].x));
cpoints[i].y = (int)(YLOG2DEV(points[i].y));
}
cpoints[n] = cpoints[0];
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( m_brush.GetStyle() != wxTRANSPARENT )
{
if ( !m_brushSelected )
SelectBrush();
m_MGLDC->fillPolygon(n, cpoints, xxoffset, yyoffset);
}
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
if ( !m_penSelected )
SelectPen();
if (m_penOfsX != 0 || m_penOfsY != 0)
{
for (int i = 0; i <= n; i++)
{
cpoints[i].x += m_penOfsX;
cpoints[i].y += m_penOfsY;
}
}
m_MGLDC->polyLine(n+1, cpoints);
}
delete[] cpoints;
}
void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
MGLPoint *cpoints = new MGLPoint[n];
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( !m_penSelected )
SelectPen();
for (int i = 0; i < n; i++)
{
CalcBoundingBox(points[i].x + xoffset, points[i].y + yoffset);
cpoints[i].x = (int)(XLOG2DEV(points[i].x + xoffset) /*+ m_penOfsX*/);
cpoints[i].y = (int)(YLOG2DEV(points[i].y + yoffset) /*+ m_penOfsY*/);
}
m_MGLDC->polyLine(n, cpoints);
delete[] cpoints;
}
}
void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxCoord xx = XLOG2DEV(x);
wxCoord yy = YLOG2DEV(y);
wxCoord ww = m_signX * XLOG2DEVREL(width);
wxCoord hh = m_signY * YLOG2DEVREL(height);
if ( ww == 0 || hh == 0 ) return;
if ( ww < 0 )
{
ww = -ww;
xx = xx - ww;
}
if ( hh < 0 )
{
hh = -hh;
yy = yy - hh;
}
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( m_brush.GetStyle() != wxTRANSPARENT )
{
if ( !m_brushSelected )
SelectBrush();
m_MGLDC->fillRect(xx, yy, xx + ww, yy + hh);
}
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
if ( !m_penSelected )
SelectPen();
m_MGLDC->rect(xx + m_penOfsX, yy + m_penOfsY,
xx + ww + m_penOfsX, yy + hh + m_penOfsY);
}
CalcBoundingBox(x, y);
CalcBoundingBox(x + width, y + height);
}
void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
if ( radius < 0.0 )
radius = -radius * ((width < height) ? width : height);
wxCoord xx = XLOG2DEV(x);
wxCoord yy = YLOG2DEV(y);
wxCoord ww = m_signX * XLOG2DEVREL(width);
wxCoord hh = m_signY * YLOG2DEVREL(height);
wxCoord rr = XLOG2DEVREL((wxCoord)radius);
// CMB: handle -ve width and/or height
if ( ww < 0 )
{
ww = -ww;
xx = xx - ww;
}
if ( hh < 0 )
{
hh = -hh;
yy = yy - hh;
}
// CMB: if radius is zero use DrawRectangle() instead to avoid
// X drawing errors with small radii
if ( rr == 0 )
{
DrawRectangle(x, y, width, height);
return;
}
// CMB: draw nothing if transformed w or h is 0
if ( ww == 0 || hh == 0 ) return;
// CMB: ensure dd is not larger than rectangle otherwise we
// get an hour glass shape
wxCoord dd = 2 * rr;
if ( dd > ww ) dd = ww;
if ( dd > hh ) dd = hh;
rr = dd / 2;
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( m_brush.GetStyle() != wxTRANSPARENT )
{
if (!m_brushSelected)
SelectBrush();
m_MGLDC->fillRect(xx+rr, yy, xx+ww-rr, yy+hh);
m_MGLDC->fillRect(xx, yy+rr, xx+ww, yy+hh-rr);
m_MGLDC->fillEllipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
m_MGLDC->fillEllipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
m_MGLDC->fillEllipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
m_MGLDC->fillEllipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
}
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
if ( !m_penSelected )
SelectPen();
xx += m_penOfsX;
yy += m_penOfsY;
m_MGLDC->line(xx+rr+1, yy, xx+ww-rr, yy);
m_MGLDC->ellipseArc(xx+ww-rr, yy+rr, rr, rr, 0, 90);
m_MGLDC->line(xx+ww, yy+rr+1, xx+ww, yy+hh-rr);
m_MGLDC->ellipseArc(xx+ww-rr, yy+hh-rr, rr, rr, 270, 0);
m_MGLDC->line(xx+ww-rr, yy+hh, xx+rr+1, yy+hh);
m_MGLDC->ellipseArc(xx+rr, yy+hh-rr, rr, rr, 180, 270);
m_MGLDC->line(xx, yy+hh-rr, xx, yy+rr+1);
m_MGLDC->ellipseArc(xx+rr, yy+rr, rr, rr, 90, 180);
}
CalcBoundingBox(x, y);
CalcBoundingBox(x + width, y + height);
}
void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxCoord x2 = (x+width);
wxCoord y2 = (y+height);
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( m_brush.GetStyle() != wxTRANSPARENT )
{
if ( !m_brushSelected )
SelectBrush();
MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
m_MGLDC->fillEllipse(rect);
}
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
if ( !m_penSelected )
SelectPen();
MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
m_MGLDC->ellipse(rect);
}
CalcBoundingBox(x, y);
CalcBoundingBox(x2, y2);
}
void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxCoord x2 = (x+w);
wxCoord y2 = (y+h);
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( m_brush.GetStyle() != wxTRANSPARENT )
{
if (!m_brushSelected) SelectBrush();
MGLRect rect(XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
m_MGLDC->fillEllipseArc(rect, (int)sa, (int)ea);
}
if ( m_pen.GetStyle() != wxTRANSPARENT )
{
if ( !m_penSelected )
SelectPen();
MGLRect rect(XLOG2DEV(x) + m_penOfsX, YLOG2DEV(y) + m_penOfsY,
XLOG2DEV(x2) + m_penOfsX, YLOG2DEV(y2) + m_penOfsY);
m_MGLDC->ellipseArc(rect, (int)sa, (int)ea);
}
CalcBoundingBox(x, y);
CalcBoundingBox(x2, y2);
}
void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
{
m_MGLDC->makeCurrent(); // will go away with MGL6.0
DrawAnyText(text, x, y);
// update the bounding box
wxCoord w, h;
CalcBoundingBox(x, y);
GetTextExtent(text, &w, &h);
CalcBoundingBox(x + w, y + h);
}
bool wxDC::SelectMGLFont()
{
if ( m_mglFont == NULL )
{
float scale = m_scaleY;
bool antialiased = (GetDepth() > 8);
m_mglFont = m_font.GetMGLfont_t(scale, antialiased);
wxCHECK_MSG( m_mglFont, false, wxT("invalid font") );
m_MGLDC->useFont(m_mglFont);
wxLogTrace("mgl_font", "useFont(%p)", m_mglFont);
#if !wxUSE_UNICODE
wxNativeEncodingInfo nativeEnc;
wxFontEncoding encoding = m_font.GetEncoding();
if ( !wxGetNativeFontEncoding(encoding, &nativeEnc) ||
!wxTestFontEncoding(nativeEnc) )
{
#if wxUSE_FONTMAP
if ( !wxFontMapper::Get()->GetAltForEncoding(encoding, &nativeEnc) )
#endif
{
nativeEnc.mglEncoding = MGL_ENCODING_ASCII;
}
}
m_MGLDC->setTextEncoding(nativeEnc.mglEncoding);
#endif
}
return true;
}
void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
SelectMGLFont();
// Render the text:
wxCoord xx = XLOG2DEV(x);
wxCoord yy = YLOG2DEV(y);
m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
m_MGLDC->setLineStipple(0xFFFF);
m_MGLDC->setPenSize(1, 1);
m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
#if wxUSE_UNICODE
const wchar_t *c_text = text.c_str();
#else
const char *c_text = text.c_str();
#endif
#if 1
// FIXME_MGL - this is a temporary hack in absence of proper
// implementation of solid text background in MGL. Once
// the bug in MGL is fixed, this code should be nuked
// immediately. Note that the code is not 100% correct;
// it only works with wxCOPY logical function
if ( m_backgroundMode == wxSOLID )
{
int w = m_MGLDC->textWidth(c_text);
int h = m_MGLDC->textHeight();
m_MGLDC->setColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
m_MGLDC->fillRect(xx, yy, xx+w, yy+h);
}
#endif
m_MGLDC->setColor(m_MGLDC->packColorFast(m_textForegroundColour.Red(),
m_textForegroundColour.Green(), m_textForegroundColour.Blue()));
m_MGLDC->setBackColor(m_MGLDC->packColorFast(m_textBackgroundColour.Red(),
m_textBackgroundColour.Green(), m_textBackgroundColour.Blue()));
m_MGLDC->drawStr(xx, yy, c_text);
// Render underline:
if ( m_font.GetUnderlined() )
{
int x1 = xx, y1 = yy;
int x2 = 0 , y2 = 0;
int w = m_MGLDC->textWidth(c_text);
m_MGLDC->underScoreLocation(x1, y1, c_text);
switch (m_MGLDC->getTextDirection())
{
case MGL_RIGHT_DIR: x2 = x1 + w, y2 = y1; break;
case MGL_LEFT_DIR: x2 = x1 - w, y2 = y1; break;
case MGL_UP_DIR: x2 = x1, y2 = y1 - w; break;
case MGL_DOWN_DIR: x2 = x1, y2 = y1 + w; break;
}
m_MGLDC->line(x1, y1, x2, y2);
}
m_penSelected = m_brushSelected = false;
}
void wxDC::DoDrawRotatedText(const wxString& text,
wxCoord x, wxCoord y,
double angle)
{
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( angle == 0 )
{
DoDrawText(text, x, y);
return;
}
else if ( angle == 90.0 )
m_MGLDC->setTextDirection(MGL_UP_DIR);
else if ( angle == 180.0 )
m_MGLDC->setTextDirection(MGL_LEFT_DIR);
else if ( angle == 270.0 )
m_MGLDC->setTextDirection(MGL_DOWN_DIR);
else
{
// FIXME_MGL -- implement once MGL supports it
wxFAIL_MSG(wxT("wxMGL only supports rotated text with angle 0,90,180 or 270"));
return;
}
DrawAnyText(text, x, y);
// Restore default:
m_MGLDC->setTextDirection(MGL_RIGHT_DIR);
}
// ---------------------------------------------------------------------------
// set GDI objects
// ---------------------------------------------------------------------------
void wxDC::SelectMGLStipplePen(int style)
{
ushort stipple;
switch (style)
{
case wxDOT: stipple = STIPPLE_wxDOT; break;
case wxLONG_DASH: stipple = STIPPLE_wxLONG_DASH; break;
case wxSHORT_DASH: stipple = STIPPLE_wxSHORT_DASH; break;
case wxDOT_DASH: stipple = STIPPLE_wxDOT_DASH; break;
default: stipple = STIPPLE_wxSOLID; break;
}
m_MGLDC->setLineStyle(MGL_LINE_STIPPLE);
m_MGLDC->setLineStipple(stipple);
m_MGLDC->setPenSize(1, 1);
m_MGLDC->setPenStyle(MGL_BITMAP_SOLID);
m_penOfsY = m_penOfsX = 0;
}
// Accepted valus of SelectMGLFatPen's 2nd argument
enum {
wxMGL_SELECT_FROM_PEN,
wxMGL_SELECT_FROM_BRUSH
};
void wxDC::SelectMGLFatPen(int style, int flag)
{
MGL_penStyleType penstyle;
const pattern_t *pattern = NULL;
pixpattern24_t *pixPattern = NULL;
int wx, wy;
int slot;
// Since MGL pens may be created from wxBrush or wxPen and we often
// switch between pens and brushes, we take advantage of MGL's ability
// to have multiple (pix)pattern_t's loaded. We always download pen
// to 0th slot and brush to 1st slot.
if ( flag == wxMGL_SELECT_FROM_PEN )
slot = 0;
else
slot = 1;
// compute pen's width:
if ( m_pen.GetWidth() <= 1 )
{
wx = wy = 1;
m_penOfsX = m_penOfsY = 0;
}
else
{
wx = (int)(0.5 + fabs((double) XLOG2DEVREL(m_pen.GetWidth())));
wy = (int)(0.5 + fabs((double) YLOG2DEVREL(m_pen.GetWidth())));
m_penOfsX = -wx/2;
m_penOfsY = -wy/2;
}
// find pen's type:
penstyle = MGL_BITMAP_TRANSPARENT;
switch (style)
{
case wxBDIAGONAL_HATCH: pattern = &PATTERN_wxBDIAGONAL_HATCH;
penstyle = MGL_BITMAP_TRANSPARENT;
break;
case wxCROSSDIAG_HATCH: pattern = &PATTERN_wxCROSSDIAG_HATCH;
penstyle = MGL_BITMAP_TRANSPARENT;
break;
case wxFDIAGONAL_HATCH: pattern = &PATTERN_wxFDIAGONAL_HATCH;
penstyle = MGL_BITMAP_TRANSPARENT;
break;
case wxCROSS_HATCH: pattern = &PATTERN_wxCROSS_HATCH;
penstyle = MGL_BITMAP_TRANSPARENT;
break;
case wxHORIZONTAL_HATCH: pattern = &PATTERN_wxHORIZONTAL_HATCH;
penstyle = MGL_BITMAP_TRANSPARENT;
break;
case wxVERTICAL_HATCH: pattern = &PATTERN_wxVERTICAL_HATCH;
penstyle = MGL_BITMAP_TRANSPARENT;
break;
case wxSTIPPLE:
if ( flag == wxMGL_SELECT_FROM_PEN )
pixPattern = (pixpattern24_t*) m_pen.GetPixPattern();
else
pixPattern = (pixpattern24_t*) m_brush.GetPixPattern();
penstyle = MGL_PIXMAP;
break;
case wxSTIPPLE_MASK_OPAQUE:
pattern = (pattern_t*) m_brush.GetMaskPattern();
penstyle = MGL_BITMAP_OPAQUE;
break;
case wxSOLID:
default:
penstyle = MGL_BITMAP_SOLID; break;
}
// ...and finally, pass the pen to MGL:
if ( pattern )
{
if ( !m_downloadedPatterns[slot] )
{
m_MGLDC->setPenBitmapPattern(slot, pattern);
m_downloadedPatterns[slot] = true;
}
m_MGLDC->usePenBitmapPattern(slot);
}
if ( pixPattern )
{
if ( !m_downloadedPatterns[slot] )
{
pixpattern_t pix;
int x, y, c;
switch (GetDepth())
{
case 8:
for (y = 0; y < 8; y++)
for (x = 0; x < 8; x++)
pix.b8.p[x][y] = (uchar)m_MGLDC->packColorFast(
pixPattern->p[x][y][0],
pixPattern->p[x][y][1],
pixPattern->p[x][y][2]);
break;
case 15:
case 16:
for (y = 0; y < 8; y++)
for (x = 0; x < 8; x++)
pix.b16.p[x][y] = (M_uint16)m_MGLDC->packColorFast(
pixPattern->p[x][y][0],
pixPattern->p[x][y][1],
pixPattern->p[x][y][2]);
break;
case 24:
for (y = 0; y < 8; y++)
for (x = 0; x < 8; x++)
for (c = 0; c < 3; c++)
pix.b24.p[x][y][c] = pixPattern->p[x][y][c];
break;
case 32:
for (y = 0; y < 8; y++)
for (x = 0; x < 8; x++)
pix.b32.p[x][y] = m_MGLDC->packColorFast(
pixPattern->p[x][y][0],
pixPattern->p[x][y][1],
pixPattern->p[x][y][2]);
break;
default:
wxFAIL_MSG(_T("invalid DC depth"));
break;
}
m_MGLDC->setPenPixmapPattern(slot, &pix);
m_downloadedPatterns[slot] = true;
}
m_MGLDC->usePenPixmapPattern(slot);
}
m_MGLDC->setLineStyle(MGL_LINE_PENSTYLE);
m_MGLDC->setPenStyle(penstyle);
m_MGLDC->setPenSize(wy, wx);
}
void wxDC::SelectPen()
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxColour& clr = m_pen.GetColour();
m_MGLDC->makeCurrent(); // will go away with MGL6.0
m_MGLDC->setColorRGB(clr.Red(), clr.Green(), clr.Blue());
switch (m_pen.GetStyle())
{
case wxTRANSPARENT:
break;
case wxDOT:
case wxLONG_DASH:
case wxSHORT_DASH:
case wxDOT_DASH:
SelectMGLStipplePen(m_pen.GetStyle());
break;
case wxBDIAGONAL_HATCH:
case wxCROSSDIAG_HATCH:
case wxFDIAGONAL_HATCH:
case wxCROSS_HATCH:
case wxHORIZONTAL_HATCH:
case wxVERTICAL_HATCH:
SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
break;
case wxSTIPPLE:
SelectMGLFatPen(m_pen.GetStyle(), wxMGL_SELECT_FROM_PEN);
break;
case wxSOLID:
case wxUSER_DASH:
default:
if ( m_pen.GetWidth() <= 1 )
SelectMGLStipplePen(wxSOLID);
else
SelectMGLFatPen(wxSOLID, wxMGL_SELECT_FROM_PEN);
break;
}
m_penSelected = true;
m_brushSelected = false;
}
void wxDC::SelectBrush()
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxColour fg, bg;
m_MGLDC->makeCurrent(); // will go away with MGL6.0
if ( m_brush.GetStyle() == wxSTIPPLE_MASK_OPAQUE )
{
fg = m_textForegroundColour;
bg = m_textBackgroundColour;
}
else
{
fg = m_brush.GetColour();
bg = m_backgroundBrush.GetColour();
}
m_MGLDC->setColorRGB(fg.Red(), fg.Green(), fg.Blue());
m_MGLDC->setBackColor(m_MGLDC->packColorFast(bg.Red(), bg.Green(), bg.Blue()));
m_penSelected = false;
m_brushSelected = true;
SelectMGLFatPen(m_brush.GetStyle(), wxMGL_SELECT_FROM_BRUSH);
}
void wxDC::SetPen(const wxPen& pen)
{
if ( !pen.Ok() ) return;
if ( m_pen == pen ) return;
m_pen = pen;
m_penSelected = false;
m_downloadedPatterns[0] = false;
}
void wxDC::SetBrush(const wxBrush& brush)
{
if ( !brush.Ok() ) return;
if ( m_brush == brush ) return;
m_brush = brush;
m_brushSelected = false;
m_downloadedPatterns[1] = false;
}
void wxDC::SetPalette(const wxPalette& palette)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
if ( !palette.Ok() )
{
if ( m_oldPalette.Ok() )
SetPalette(m_oldPalette);
return;
}
if ( palette.IsSameAs(m_palette) )
return;
m_oldPalette = m_palette;
m_palette = palette;
int cnt = m_palette.GetColoursCount();
palette_t *pal = m_palette.GetMGLpalette_t();
m_MGLDC->setPalette(pal, cnt, 0);
m_MGLDC->realizePalette(cnt, 0, TRUE);
}
void wxDC::SetFont(const wxFont& font)
{
if ( font.Ok() )
{
m_font = font;
m_mglFont = NULL;
}
}
void wxDC::SetBackground(const wxBrush& brush)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
if (!brush.Ok()) return;
m_backgroundBrush = brush;
wxColour &clr = m_backgroundBrush.GetColour();
m_MGLDC->makeCurrent(); // will go away with MGL6.0
m_MGLDC->setBackColor(
m_MGLDC->packColorFast(clr.Red(), clr.Green(), clr.Blue()));
}
void wxDC::SetBackgroundMode(int mode)
{
m_backgroundMode = mode;
if ( mode == wxSOLID )
m_MGLDC->setBackMode(MGL_OPAQUE_BACKGROUND);
else
m_MGLDC->setBackMode(MGL_TRANSPARENT_BACKGROUND);
}
void wxDC::SetLogicalFunction(wxRasterOperationMode function)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
m_logicalFunction = function;
m_MGLDC->makeCurrent(); // will go away with MGL6.0
m_MGLDC->setWriteMode(LogicalFunctionToMGLRop(m_logicalFunction));
}
int wxDC::LogicalFunctionToMGLRop(int logFunc) const
{
MGL_writeModeType rop;
switch (logFunc)
{
case wxCLEAR: rop = MGL_R2_BLACK; break;
case wxXOR: rop = MGL_R2_XORSRC; break;
case wxINVERT: rop = MGL_R2_NOT; break;
case wxOR_REVERSE: rop = MGL_R2_MERGESRCNOT; break;
case wxAND_REVERSE: rop = MGL_R2_MASKSRCNOT; break;
case wxCOPY: rop = MGL_R2_COPYSRC; break;
case wxAND: rop = MGL_R2_MASKSRC; break;
case wxAND_INVERT: rop = MGL_R2_MASKNOTSRC; break;
case wxNO_OP: rop = MGL_R2_NOP; break;
case wxNOR: rop = MGL_R2_NOTMERGESRC; break;
case wxEQUIV: rop = MGL_R2_NOTXORSRC; break;
case wxSRC_INVERT: rop = MGL_R2_NOTCOPYSRC; break;
case wxOR_INVERT: rop = MGL_R2_MERGENOTSRC; break;
case wxNAND: rop = MGL_R2_NOTMASKSRC; break;
case wxOR: rop = MGL_R2_MERGESRC; break;
case wxSET: rop = MGL_R2_WHITE; break;
default:
wxFAIL_MSG( wxT("unsupported logical function") );
return MGL_REPLACE_MODE;
}
return (int)rop;
}
bool wxDC::StartDoc(const wxString& WXUNUSED(message))
{
// We might be previewing, so return true to let it continue.
return true;
}
void wxDC::EndDoc()
{
}
void wxDC::StartPage()
{
}
void wxDC::EndPage()
{
}
// ---------------------------------------------------------------------------
// text metrics
// ---------------------------------------------------------------------------
wxCoord wxDC::GetCharHeight() const
{
wxCurrentDCSwitcher switcher(m_MGLDC);
if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
return YDEV2LOGREL(m_mglFont->fontHeight);
}
wxCoord wxDC::GetCharWidth() const
{
wxCurrentDCSwitcher switcher(m_MGLDC);
if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return -1;
// VS: wxT() is intentional, charWidth() has both char and wchar_t version
// VS: YDEV is corrent, it should *not* be XDEV, because font's are only
// scaled according to m_scaleY
return YDEV2LOGREL(m_mglFont->fontWidth);
}
void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
wxCoord *descent, wxCoord *externalLeading,
const wxFont *theFont) const
{
wxFont oldFont;
if ( theFont != NULL )
{
oldFont = m_font;
wxConstCast(this, wxDC)->SetFont(*theFont);
}
wxCurrentDCSwitcher switcher(m_MGLDC);
if ( !wxConstCast(this, wxDC)->SelectMGLFont() ) return;
if ( x )
// VS: YDEV is corrent, it should *not* be XDEV, because font's are
// only scaled according to m_scaleY
*x = YDEV2LOGREL(m_MGLDC->textWidth(string.wc_str()));
if ( y )
*y = YDEV2LOGREL(m_MGLDC->textHeight());
if ( descent )
*descent = YDEV2LOGREL(m_mglFont->descent);
if ( externalLeading )
*externalLeading = YDEV2LOGREL(m_mglFont->leading);
if ( theFont != NULL )
wxConstCast(this, wxDC)->SetFont(oldFont);
}
// ---------------------------------------------------------------------------
// mapping modes
// ---------------------------------------------------------------------------
void wxDC::ComputeScaleAndOrigin()
{
double newX = m_logicalScaleX * m_userScaleX;
double newY = m_logicalScaleY * m_userScaleY;
// make sure font will be reloaded before drawing:
if ( newY != m_scaleY )
m_mglFont = NULL;
// make sure m_penOfs{X,Y} will be reevaluated before drawing:
if ( newY != m_scaleY || newX != m_scaleX )
m_penSelected = false;
m_scaleX = newX, m_scaleY = newY;
}
void wxDC::DoGetSize(int *w, int *h) const
{
if (w) *w = m_MGLDC->sizex()+1;
if (h) *h = m_MGLDC->sizey()+1;
}
void wxDC::DoGetSizeMM(int *width, int *height) const
{
int w = 0;
int h = 0;
GetSize(&w, &h);
if ( width ) *width = int(double(w) / (m_userScaleX*m_mm_to_pix_x));
if ( height ) *height = int(double(h) / (m_userScaleY*m_mm_to_pix_y));
}
wxSize wxDC::GetPPI() const
{
return wxSize(int(double(m_mm_to_pix_x) * inches2mm),
int(double(m_mm_to_pix_y) * inches2mm));
}
// ---------------------------------------------------------------------------
// Blitting
// ---------------------------------------------------------------------------
bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
wxCoord width, wxCoord height,
wxDC *source, wxCoord xsrc, wxCoord ysrc,
wxRasterOperationMode rop, bool useMask,
wxCoord xsrcMask, wxCoord ysrcMask)
{
wxCHECK_MSG( Ok(), false, wxT("invalid dc") );
wxCHECK_MSG( source, false, wxT("invalid source dc") );
// transform the source DC coords to the device ones
xsrc = source->LogicalToDeviceX(xsrc);
ysrc = source->LogicalToDeviceY(ysrc);
/* FIXME_MGL: use the mask origin when drawing transparently */
if (xsrcMask == -1 && ysrcMask == -1)
{
xsrcMask = xsrc; ysrcMask = ysrc;
}
else
{
xsrcMask = source->LogicalToDeviceX(xsrcMask);
ysrcMask = source->LogicalToDeviceY(ysrcMask);
}
CalcBoundingBox(xdest, ydest);
CalcBoundingBox(xdest + width, ydest + height);
/* scale/translate size and position */
wxCoord xx = XLOG2DEV(xdest);
wxCoord yy = YLOG2DEV(ydest);
if ( source->m_isMemDC )
{
wxMemoryDC *memDC = (wxMemoryDC*) source;
DoDrawSubBitmap(memDC->GetSelectedObject(),
xsrc, ysrc, width, height,
xdest, ydest, rop, useMask);
}
else
{
wxCoord ww = XLOG2DEVREL(width);
wxCoord hh = YLOG2DEVREL(height);
m_MGLDC->makeCurrent(); // will go away with MGL6.0
m_MGLDC->bitBlt(*source->GetMGLDC(),
xsrc, ysrc, xsrc + ww, ysrc + hh,
xx, yy, LogicalFunctionToMGLRop(rop));
}
return true;
}
void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
wxCoord w = bmp.GetWidth();
wxCoord h = bmp.GetHeight();
DoDrawSubBitmap(bmp, 0, 0, w, h, x, y, m_logicalFunction, useMask);
}
void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
{
// VZ: egcs 1.0.3 refuses to compile this without cast, no idea why
DoDrawBitmap((const wxBitmap&)icon, x, y, true);
}
static inline void DoBitBlt(const wxBitmap& src, MGLDevCtx *dst,
int sx, int sy, int sw, int sh,
int dx, int dy, int dw, int dh,
int rop, bool useStretching, bool putSection)
{
bitmap_t *bmp = src.GetMGLbitmap_t();
if (!useStretching)
{
if (!putSection)
dst->putBitmap(dx, dy, bmp, rop);
else
dst->putBitmapSection(sx, sy, sx + sw, sy + sh, dx, dy, bmp, rop);
}
else
{
if (!putSection)
dst->stretchBitmap(dx, dy, dx + dw, dy + dh, bmp, rop);
else
dst->stretchBitmapSection(sx, sy, sx + sw, sy + sh,
dx, dy, dx + dw, dy + dh, bmp, rop);
}
}
void wxDC::DoDrawSubBitmap(const wxBitmap &bmp,
wxCoord x, wxCoord y, wxCoord w, wxCoord h,
wxCoord destx, wxCoord desty, int rop, bool useMask)
{
wxCHECK_RET( Ok(), wxT("invalid dc") );
wxCHECK_RET( bmp.Ok(), wxT("invalid bitmap") );
CalcBoundingBox(x, y);
CalcBoundingBox(x + w, y + h);
wxCoord dx = XLOG2DEV(destx);
wxCoord dy = YLOG2DEV(desty);
wxCoord dw = XLOG2DEVREL(w);
wxCoord dh = YLOG2DEVREL(h);
m_MGLDC->makeCurrent(); // will go away with MGL6.0
bool useStretching = ((w != dw) || (h != dh));
bool putSection = (w != bmp.GetWidth() || h != bmp.GetHeight());
MGL_writeModeType mglRop = (MGL_writeModeType)LogicalFunctionToMGLRop(rop);
if ( bmp.GetDepth() == 1 )
{
// Mono bitmaps are handled in special way -- all 1s are drawn in
// foreground colours, all 0s in background colour.
((wxBitmap&)bmp).SetMonoPalette(m_textForegroundColour, m_textBackgroundColour);
}
if ( useMask && bmp.GetMask() )
{
// Since MGL does not support masks directly (in MGL, mask is handled
// in same way as in wxImage, i.e. there is one "key" color), we
// simulate masked bitblt in 6 steps (same as in MSW):
//
// 1. Create a temporary bitmap and copy the destination area into it.
// 2. Copy the source area into the temporary bitmap using the
// specified logical function.
// 3. Set the masked area in the temporary bitmap to BLACK by ANDing
// the mask bitmap with the temp bitmap with the foreground colour
// set to WHITE and the bg colour set to BLACK.
// 4. Set the unmasked area in the destination area to BLACK by
// ANDing the mask bitmap with the destination area with the
// foreground colour set to BLACK and the background colour set
// to WHITE.
// 5. OR the temporary bitmap with the destination area.
// 6. Delete the temporary bitmap.
//
// This sequence of operations ensures that the source's transparent
// area need not be black, and logical functions are supported.
wxBitmap mask = bmp.GetMask()->GetBitmap();
MGLMemoryDC *temp;
if ( GetDepth() <= 8 )
{
temp = new MGLMemoryDC(dw, dh, GetDepth(), NULL);
wxDC tempdc;
tempdc.SetMGLDC(temp, false);
tempdc.SetPalette(m_palette);
}
else
{
pixel_format_t pf;
m_MGLDC->getPixelFormat(pf);
temp = new MGLMemoryDC(dw, dh, GetDepth(), &pf);
}
wxCHECK_RET( temp->isValid(), wxT("cannot create temporary dc") );
temp->bitBlt(*m_MGLDC, dx, dy, dx + dw, dy + dh, 0, 0, MGL_REPLACE_MODE);
DoBitBlt(bmp, temp, x, y, w, h, 0, 0, dw, dh, mglRop,
useStretching, putSection);
mask.SetMonoPalette(wxColour(0,0,0), wxColour(255,255,255));
DoBitBlt(mask, temp, x, y, w, h, 0, 0, dw, dh, MGL_R2_MASKSRC,
useStretching, putSection);
DoBitBlt(mask, m_MGLDC, x, y, w, h, dx, dy, dw, dh, MGL_R2_MASKNOTSRC,
useStretching, putSection);
m_MGLDC->bitBlt(*temp, 0, 0, dw, dh, dx, dy, MGL_OR_MODE);
delete temp;
}
else
{
DoBitBlt(bmp, m_MGLDC, x, y, w, h, dx, dy, dw, dh, mglRop,
useStretching, putSection);
}
}
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