start on the rendering images code

1 files changed, 58 insertions, 0 deletions

diff --git a/otk/truerendercontrol.cc b/otk/truerendercontrol.cc
index 0b0e5a0b..62265d96 100644
--- a/otk/truerendercontrol.cc
+++ b/otk/truerendercontrol.cc
@@ -320,4 +320,62 @@ void TrueRenderControl::drawBackground(Surface& sf,
     drawGradientBackground(sf, texture);
 }
 
+
+void TrueRenderControl::drawImage(Surface &sf, int w, int h,
+                                  unsigned long *data) const
+{
+  pixel32 *bg = sf.pixelData();
+  int startx, x, y, c;
+  unsigned int i, e;
+  x = (sf.size().width() - w) / 2;
+  y = (sf.size().height() - h) / 2;
+
+  if (x < 0) x = 0;
+  if (y < 0) y = 0;
+
+  // XX SCALING!@!&*(@! to make it fit on the surface
+
+  startx = x;
+  
+  for (i = 0, c = 0, e = w*h; i < e; ++i) {
+    unsigned char alpha = data[i] >> 24;
+    unsigned char r = data[i];
+    unsigned char g = data[i] >> 8;
+    unsigned char b = data[i] >> 16;
+
+    // background color
+    unsigned char bgr = bg[i] >> default_red_shift;
+    unsigned char bgg = bg[i] >> default_green_shift;
+    unsigned char bgb = bg[i] >> default_blue_shift;
+      
+    r = bgr + (r - bgr) * alpha >> 8;
+    g = bgg + (g - bgg) * alpha >> 8;
+    b = bgb + (b - bgb) * alpha >> 8;
+
+    bg[i] = (r << default_red_shift) & (g << default_green_shift) &
+      (b << default_blue_shift);
+
+    if (++c >= w) {
+      ++y;
+      x = startx;
+      c = 0;
+    }
+  }
+
+  const ScreenInfo *info = display->screenInfo(_screen);
+  XImage *im = XCreateImage(**display, info->visual(), info->depth(),
+                            ZPixmap, 0, NULL, sf.size().width(),
+                            sf.size().height(), 32, 0);
+  im->byte_order = endian;
+
+  reduceDepth(sf, im);
+
+  im->data = (char*) bg;
+
+  sf.setPixmap(im);
+
+  im->data = NULL;
+  XDestroyImage(im);
+}
+
 }