+void TrueRenderControl::verticalGradient(Surface &sf,
+ const RenderTexture &texture,
+ pixel32 *data) const
+{
+ pixel32 current;
+ float dr, dg, db;
+ unsigned int r,g,b;
+
+ dr = (float)(texture.secondary_color().red() - texture.color().red());
+ dr/= (float)sf.height();
+
+ dg = (float)(texture.secondary_color().green() - texture.color().green());
+ dg/= (float)sf.height();
+
+ db = (float)(texture.secondary_color().blue() - texture.color().blue());
+ db/= (float)sf.height();
+
+ for (int y = 0; y < sf.height(); ++y) {
+ r = texture.color().red() + (int)(dr * y);
+ g = texture.color().green() + (int)(dg * y);
+ b = texture.color().blue() + (int)(db * y);
+ current = (r << default_red_shift)
+ + (g << default_green_shift)
+ + (b << default_blue_shift);
+ for (int x = 0; x < sf.width(); ++x, ++data)
+ *data = current;
+ }
+}
+
+void TrueRenderControl::diagonalGradient(Surface &sf,
+ const RenderTexture &texture,
+ pixel32 *data) const
+{
+ pixel32 current;
+ float drx, dgx, dbx, dry, dgy, dby;
+ unsigned int r,g,b;
+
+
+ for (int y = 0; y < sf.height(); ++y) {
+ drx = (float)(texture.secondary_color().red() - texture.color().red());
+ dry = drx/(float)sf.height();
+ drx/= (float)sf.width();
+
+ dgx = (float)(texture.secondary_color().green() - texture.color().green());
+ dgy = dgx/(float)sf.height();
+ dgx/= (float)sf.width();
+
+ dbx = (float)(texture.secondary_color().blue() - texture.color().blue());
+ dby = dbx/(float)sf.height();
+ dbx/= (float)sf.width();
+ for (int x = 0; x < sf.width(); ++x, ++data) {
+ r = texture.color().red() + ((int)(drx * x) + (int)(dry * y))/2;
+ g = texture.color().green() + ((int)(dgx * x) + (int)(dgy * y))/2;
+ b = texture.color().blue() + ((int)(dbx * x) + (int)(dby * y))/2;
+ current = (r << default_red_shift)
+ + (g << default_green_shift)
+ + (b << default_blue_shift);
+ *data = current;
+ }
+ }
+}
+
+void TrueRenderControl::crossDiagonalGradient(Surface &sf,
+ const RenderTexture &texture,
+ pixel32 *data) const
+{
+ pixel32 current;
+ float drx, dgx, dbx, dry, dgy, dby;
+ unsigned int r,g,b;
+
+ for (int y = 0; y < sf.height(); ++y) {
+ drx = (float)(texture.secondary_color().red() - texture.color().red());
+ dry = drx/(float)sf.height();
+ drx/= (float)sf.width();
+
+ dgx = (float)(texture.secondary_color().green() - texture.color().green());
+ dgy = dgx/(float)sf.height();
+ dgx/= (float)sf.width();
+
+ dbx = (float)(texture.secondary_color().blue() - texture.color().blue());
+ dby = dbx/(float)sf.height();
+ dbx/= (float)sf.width();
+ for (int x = sf.width(); x > 0; --x, ++data) {
+ r = texture.color().red() + ((int)(drx * (x-1)) + (int)(dry * y))/2;
+ g = texture.color().green() + ((int)(dgx * (x-1)) + (int)(dgy * y))/2;
+ b = texture.color().blue() + ((int)(dbx * (x-1)) + (int)(dby * y))/2;
+ current = (r << default_red_shift)
+ + (g << default_green_shift)
+ + (b << default_blue_shift);
+ *data = current;
+ }
+ }
+}
+