diff options
Diffstat (limited to 'gtk/PlatGTK.cxx')
| -rw-r--r-- | gtk/PlatGTK.cxx | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/gtk/PlatGTK.cxx b/gtk/PlatGTK.cxx index f776a2c19..20c518fdb 100644 --- a/gtk/PlatGTK.cxx +++ b/gtk/PlatGTK.cxx @@ -713,6 +713,8 @@ public: void FillRectangle(PRectangle rc, ColourAllocated back); void FillRectangle(PRectangle rc, Surface &surfacePattern); void RoundedRectangle(PRectangle rc, ColourAllocated fore, ColourAllocated back); + void AlphaRectangle(PRectangle rc, int cornerSize, ColourAllocated fill, int alphaFill, + ColourAllocated outline, int alphaOutline, int flags); void Ellipse(PRectangle rc, ColourAllocated fore, ColourAllocated back); void Copy(PRectangle rc, Point from, Surface &surfaceSource); @@ -1014,6 +1016,88 @@ void SurfaceImpl::RoundedRectangle(PRectangle rc, ColourAllocated fore, ColourAl } } +// Plot a point into a guint32 buffer symetrically to all 4 qudrants +static void AllFour(guint32 *pixels, int stride, int width, int height, int x, int y, guint32 val) { + pixels[y*stride+x] = val; + pixels[y*stride+width-1-x] = val; + pixels[(height-1-y)*stride+x] = val; + pixels[(height-1-y)*stride+width-1-x] = val; +} + +static unsigned int GetRValue(unsigned int co) { + return (co >> 16) & 0xff; +} + +static unsigned int GetGValue(unsigned int co) { + return (co >> 8) & 0xff; +} + +static unsigned int GetBValue(unsigned int co) { + return co & 0xff; +} + +#if GTK_MAJOR_VERSION < 2 +void SurfaceImpl::AlphaRectangle(PRectangle rc, int , ColourAllocated , int , ColourAllocated outline, int , int ) { + if (gc && drawable) { + // Can't use GdkPixbuf on GTK+ 1.x, so draw an outline rather than use alpha. + PenColour(outline); + gdk_draw_rectangle(drawable, gc, 0, + rc.left, rc.top, + rc.right - rc.left - 1, rc.bottom - rc.top - 1); + } +} +#else +void SurfaceImpl::AlphaRectangle(PRectangle rc, int cornerSize, ColourAllocated fill, int alphaFill, + ColourAllocated outline, int alphaOutline, int flags) { + if (gc && drawable) { + int width = rc.Width(); + int height = rc.Height(); + // Ensure not distorted too much by corners when small + cornerSize = Platform::Minimum(cornerSize, (Platform::Minimum(width, height) / 2) - 2); + // Make a 32 bit deep pixbuf with alpha + GdkPixbuf *pixalpha = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, width, height); + + guint8 pixVal[4] = {0}; + guint32 valEmpty = *(reinterpret_cast<guint32 *>(pixVal)); + pixVal[0] = GetRValue(fill.AsLong()); + pixVal[1] = GetGValue(fill.AsLong()); + pixVal[2] = GetBValue(fill.AsLong()); + pixVal[3] = alphaFill; + guint32 valFill = *(reinterpret_cast<guint32 *>(pixVal)); + pixVal[0] = GetRValue(outline.AsLong()); + pixVal[1] = GetGValue(outline.AsLong()); + pixVal[2] = GetBValue(outline.AsLong()); + pixVal[3] = alphaOutline; + guint32 valOutline = *(reinterpret_cast<guint32 *>(pixVal)); + guint32 *pixels = reinterpret_cast<guint32 *>(gdk_pixbuf_get_pixels(pixalpha)); + int stride = gdk_pixbuf_get_rowstride(pixalpha) / 4; + for (int y=0; y<height; y++) { + for (int x=0; x<width; x++) { + if ((x==0) || (x==width-1) || (y == 0) || (y == height-1)) { + pixels[y*stride+x] = valOutline; + } else { + pixels[y*stride+x] = valFill; + } + } + } + for (int c=0;c<cornerSize; c++) { + for (int x=0;x<c+1; x++) { + AllFour(pixels, stride, width, height, x, c-x, valEmpty); + } + } + for (int x=1;x<cornerSize; x++) { + AllFour(pixels, stride, width, height, x, cornerSize-x, valOutline); + } + + // Draw with alpha + gdk_draw_pixbuf(drawable, gc, pixalpha, + 0,0, rc.left,rc.top, width,height, GDK_RGB_DITHER_NORMAL, 0, 0); + + g_object_unref(pixalpha); + } +} +#endif + void SurfaceImpl::Ellipse(PRectangle rc, ColourAllocated fore, ColourAllocated back) { PenColour(back); gdk_draw_arc(drawable, gc, 1, |