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Forward port of my recent changes in the 2.8 branch:

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* Force use of floating point math in wxGCDC::DoDrawEllipticArc.

 * Check for 0.5 offset in wxGCDC::DoDrawRoundedRectangle and
   DoDrawEllipse.  Set wxGDIPlusContext to use the offset.

 * Avoid crash in wxStdDialogButtonSizer::Realize if there is no
   negative button.

 * Provide implementations for wxCairoPathData::AddPath,
   wxCairoContext::Clip, wxCairoContext::DrawBitmap,
   wxCairoContext::DrawIcon, and wxCairoContext::GetTextExtent.

 * Fix wxCairoContext::DrawText to draw the text using the upper-left
   corner for the x,y position, not the baseline.

 * Fix wxMacCoreGraphicsRenderer::CreateContext to be able to use a
   wxMemoryDC as the target.

 * Map wxTELETYPE font family on wxMac to a monospace font.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45077 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robin Dunn
2007-03-26 20:08:41 +00:00
parent 28e88942bc
commit d9485f89b8
6 changed files with 211 additions and 30 deletions
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187
src/generic/graphicc.cpp
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@@ -37,6 +37,7 @@
#endif
#include "wx/graphics.h"
#include "wx/rawbmp.h"
#if wxUSE_GRAPHICS_CONTEXT
@@ -757,7 +758,9 @@ void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
{
// TODO
cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
cairo_append_path(m_pathContext, p);
UnGetNativePath(p);
}
void wxCairoPathData::CloseSubpath()
@@ -1028,19 +1031,44 @@ wxCairoContext::~wxCairoContext()
}
void wxCairoContext::Clip( const wxRegion & WXUNUSED(region) )
void wxCairoContext::Clip( const wxRegion& region )
{
// TODO
// Create a path with all the rectangles in the region
wxGraphicsPath path = GetRenderer()->CreatePath();
wxRegionIterator ri(region);
while (ri)
{
path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
ri++;
}
// Put it in the context
cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
cairo_append_path(m_context, cp);
// clip to that path
cairo_clip(m_context);
path.UnGetNativePath(cp);
}
void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
{
// TODO
// Create a path with this rectangle
wxGraphicsPath path = GetRenderer()->CreatePath();
path.AddRectangle(x,y,w,h);
// Put it in the context
cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
cairo_append_path(m_context, cp);
// clip to that path
cairo_clip(m_context);
path.UnGetNativePath(cp);
}
void wxCairoContext::ResetClip()
{
// TODO
cairo_reset_clip(m_context);
}
@@ -1118,37 +1146,156 @@ void wxCairoContext::PopState()
void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
{
/*
Bitmap* image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
delete image ;
*/
wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
cairo_surface_t* surface;
int bw = bmp.GetWidth();
int bh = bmp.GetHeight();
wxBitmap bmpSource = bmp; // we need a non-const instance
unsigned char* buffer = new unsigned char[bw*bh*4];
wxUint32* data = (wxUint32*)buffer;
// Create a surface object and copy the bitmap pixel data to it. if the
// image has alpha (or a mask represented as alpha) then we'll use a
// different format and iterator than if it doesn't...
if (bmpSource.HasAlpha() || bmpSource.GetMask())
{
surface = cairo_image_surface_create_for_data(
buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4);
wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
wxAlphaPixelData::Iterator p(pixData);
for (int y=0; y<bh; y++)
{
wxAlphaPixelData::Iterator rowStart = p;
for (int x=0; x<bw; x++)
{
// Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
// with alpha in the upper 8 bits, then red, then green, then
// blue. The 32-bit quantities are stored native-endian.
// Pre-multiplied alpha is used.
unsigned char alpha = p.Alpha();
if (alpha == 0)
*data = 0;
else
*data = ( alpha << 24
| (p.Red() * alpha/255) << 16
| (p.Green() * alpha/255) << 8
| (p.Blue() * alpha/255) );
++data;
++p;
}
p = rowStart;
p.OffsetY(pixData, 1);
}
}
else // no alpha
{
surface = cairo_image_surface_create_for_data(
buffer, CAIRO_FORMAT_RGB24, bw, bh, bw*4);
wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
wxNativePixelData::Iterator p(pixData);
for (int y=0; y<bh; y++)
{
wxNativePixelData::Iterator rowStart = p;
for (int x=0; x<bw; x++)
{
// Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
// the upper 8 bits unused. Red, Green, and Blue are stored in
// the remaining 24 bits in that order. The 32-bit quantities
// are stored native-endian.
*data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
++data;
++p;
}
p = rowStart;
p.OffsetY(pixData, 1);
}
}
PushState();
// In case we're scaling the image by using a width and height different
// than the bitmap's size create a pattern transformation on the surface and
// draw the transformed pattern.
cairo_pattern_t* pattern = cairo_pattern_create_for_surface(surface);
wxDouble scaleX = w / bw;
wxDouble scaleY = h / bh;
cairo_scale(m_context, scaleX, scaleY);
// prepare to draw the image
cairo_translate(m_context, x, y);
cairo_set_source(m_context, pattern);
// use the original size here since the context is scaled already...
cairo_rectangle(m_context, 0, 0, bw, bh);
// fill the rectangle using the pattern
cairo_fill(m_context);
// clean up
cairo_pattern_destroy(pattern);
cairo_surface_destroy(surface);
delete [] buffer;
PopState();
}
void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
{
/*
Bitmap* image = Bitmap::FromHICON((HICON)icon.GetHICON());
m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
delete image ;
*/
// An icon is a bitmap on wxGTK, so do this the easy way. When we want to
// start using the Cairo backend on other platforms then we may need to
// fiddle with this...
DrawBitmap(icon, x, y, w, h);
}
void wxCairoContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
{
if ( m_font.IsNull() || str.IsEmpty())
return ;
cairo_move_to(m_context,x,y);
const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
if ( m_font.IsNull() || str.empty())
return;
((wxCairoFontData*)m_font.GetRefData())->Apply(this);
// Cairo's x,y for drawing text is at the baseline, so we need to adjust
// the position we move to by the ascent.
cairo_font_extents_t fe;
cairo_font_extents(m_context, &fe);
cairo_move_to(m_context, x, y+fe.ascent);
const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
cairo_show_text(m_context,buf);
}
void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
wxDouble *descent, wxDouble *externalLeading ) const
{
// TODO
if ( m_font.IsNull() || str.empty())
return;
((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
if (width)
{
const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
cairo_text_extents_t te;
cairo_text_extents(m_context, buf, &te);
*width = te.width;
}
if (height || descent || externalLeading)
{
cairo_font_extents_t fe;
cairo_font_extents(m_context, &fe);
if (height)
*height = fe.height;
if ( descent )
*descent = fe.descent;
if ( externalLeading )
*externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
}
}
void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const