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fixed scaling and bug in copyArea

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This commit is contained in:
fluxgen 2003-04-27 23:56:13 +00:00
parent 1db7e5fb0c
commit 45fff3a4b2
1 changed files with 67 additions and 3 deletions
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70
src/FbTk/FbPixmap.cc
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@ -19,11 +19,15 @@
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
// $Id: FbPixmap.cc,v 1.2 2003/04/27 00:12:17 fluxgen Exp $
// $Id: FbPixmap.cc,v 1.3 2003/04/27 23:56:13 fluxgen Exp $
#include "FbPixmap.hh"
#include "App.hh"
#include <X11/Xutil.h>
#include <iostream>
using namespace std;
namespace FbTk {
FbPixmap::FbPixmap():m_pm(0),
@ -67,8 +71,8 @@ void FbPixmap::copyArea(Drawable src, GC gc,
XCopyArea(FbTk::App::instance()->display(),
src, m_pm, gc,
src_x, src_y,
dest_x, dest_y,
width, height);
width, height,
dest_x, dest_y);
}
void FbPixmap::fillRectangle(GC gc, int x, int y,
@ -170,6 +174,66 @@ void FbPixmap::copy(const FbPixmap &the_copy) {
}
}
void FbPixmap::scale(unsigned int dest_width, unsigned int dest_height) {
if (drawable() == 0 ||
(dest_width == width() && dest_height == height()))
return;
Display *dpy = FbTk::App::instance()->display();
XImage *src_image = XGetImage(dpy, drawable(),
0, 0, // pos
width(), height(), // size
~0, // plane mask
ZPixmap); // format
if (src_image == 0)
return;
// create new pixmap with dest size
FbPixmap new_pm(drawable(), dest_width, dest_height, depth());
GC gc = XCreateGC(dpy, drawable(), 0, 0);
// calc zoom
float zoom_x = static_cast<float>(width())/static_cast<float>(dest_width);
float zoom_y = static_cast<float>(height())/static_cast<float>(dest_height);
// start scaling
float src_x = 0, src_y = 0;
for (int tx=0; tx<dest_width; ++tx, src_x += zoom_x) {
src_y = 0;
for (int ty=0; ty<dest_height; ++ty, src_y += zoom_y) {
XSetForeground(dpy, gc, XGetPixel(src_image,
static_cast<int>(src_x),
static_cast<int>(src_y)));
XDrawPoint(dpy, new_pm.drawable(), gc, tx, ty);
}
}
XFreeGC(dpy, gc);
XDestroyImage(src_image);
// free old pixmap and set new from new_pm
free();
m_width = new_pm.width();
m_height = new_pm.height();
m_depth = new_pm.depth();
m_pm = new_pm.release();
}
Pixmap FbPixmap::release() {
Pixmap ret = m_pm;
m_pm = 0;
m_width = 0;
m_height = 0;
m_depth = 0;
return ret;
}
void FbPixmap::free() {
if (m_pm != 0) {
XFreePixmap(FbTk::App::instance()->display(), m_pm);