oops, I think there was error in this patch, yet even after fixing it I
can't see obvious result? (some other modes also show only one obvious
colored track, not overlays.. so I think different, more complex test
project is needed)
On Saturday, June 26, 2021, Andrew Randrianasulu <[email protected]>
wrote:
> see attached patch (it copypastes badly)
>
> it compiles but I tried solid-color track over fading png text (as in
> black_flash.xml) and I can't see it working?
>
> I just hope it can serve as guide what to modify for adding new modes..
>
> I tried to write down math from this page:
> https://natron.readthedocs.io/en/rb-2.3/plugins/net.sf.
> openfx.MergePlugin.html
>
>
>
diff --git a/cinelerra-5.1/cinelerra/overlayframe.C
b/cinelerra-5.1/cinelerra/overlayframe.C
index 270755cc..801ae9d3 100644
--- a/cinelerra-5.1/cinelerra/overlayframe.C
+++ b/cinelerra-5.1/cinelerra/overlayframe.C
@@ -351,5 +351,3 @@ int OverlayFrame::overlay(VFrame *output, VFrame *input,
}
return 0;
}
-
-
diff --git a/cinelerra-5.1/cinelerra/overlayframe.h
b/cinelerra-5.1/cinelerra/overlayframe.h
index 13c2e4bd..b6ebec35 100644
--- a/cinelerra-5.1/cinelerra/overlayframe.h
+++ b/cinelerra-5.1/cinelerra/overlayframe.h
@@ -45,6 +45,9 @@
#define ONE 1
#define TWO 2
+// Sa = source alpha, Sc = source color
+// Da = dst alpha, Dc = dst color
+
// NORMAL [Sa + Da * (1 - Sa), Sc * Sa + Dc * (1 - Sa)])
#define ALPHA_NORMAL(mx, Sa, Da) (Sa + (Da * (mx - Sa)) / mx)
#define COLOR_NORMAL(mx, Sc, Sa, Dc, Da) ((Sc * Sa + Dc * (mx - Sa)) / mx)
@@ -220,6 +223,12 @@
(mabs(Sc * Da - Dc * Sa) / mx))
#define CHROMA_DIFFERENCE COLOR_DIFFERENCE
+// REFLECT [Sa * Sa / (1 - Da]
+#define ALPHA_REFLECT (mx, Sa, Da) (Sa * Sa * (mx - Da) / mx)
+#define COLOR_REFLECT (mx, Sc, Da, Dc, Da) (Sc * Sc * (mx - Dc) / mx)
+#define CHROMA_REFLECT COLOR_REFLECT
+
+
static inline int mabs(int32_t v) { return abs(v); }
static inline int mabs(int64_t v) { return llabs(v); }
static inline float mabs(float v) { return fabsf(v); }
diff --git a/cinelerra-5.1/cinelerra/overlayframe.inc
b/cinelerra-5.1/cinelerra/overlayframe.inc
index 5f84036d..91e39fc9 100644
--- a/cinelerra-5.1/cinelerra/overlayframe.inc
+++ b/cinelerra-5.1/cinelerra/overlayframe.inc
@@ -24,7 +24,7 @@
// Modes
-#define TRANSFER_TYPES 30
+#define TRANSFER_TYPES 31
#define TRANSFER_NORMAL 0
#define TRANSFER_ADDITION 1
@@ -56,6 +56,7 @@
#define TRANSFER_HARDLIGHT 27
#define TRANSFER_SOFTLIGHT 28
#define TRANSFER_DIFFERENCE 29
+#define TRANSFER_REFLECT 30
// Interpolation types
diff --git a/cinelerra-5.1/cinelerra/patchbay.C
b/cinelerra-5.1/cinelerra/patchbay.C
index c2ae534d..fd17df1a 100644
--- a/cinelerra-5.1/cinelerra/patchbay.C
+++ b/cinelerra-5.1/cinelerra/patchbay.C
@@ -218,6 +218,7 @@ void PatchBay::create_objects()
"mode_hardlight",
"mode_softlight",
"mode_difference",
+ "mode_reflect",
};
for( int mode=0; mode<TRANSFER_TYPES; ++mode ) {
mode_icons[mode] = new BC_Pixmap(this,
diff --git a/cinelerra-5.1/cinelerra/vpatchgui.C
b/cinelerra-5.1/cinelerra/vpatchgui.C
index 53ec27fb..a8ade2c4 100644
--- a/cinelerra-5.1/cinelerra/vpatchgui.C
+++ b/cinelerra-5.1/cinelerra/vpatchgui.C
@@ -354,6 +354,7 @@ void VModePatch::create_objects()
submenu->add_submenuitem(new VModeSubMenuItem(submenu,
mode_to_text(TRANSFER_DIVIDE), TRANSFER_DIVIDE));
submenu->add_submenuitem(new VModeSubMenuItem(submenu,
mode_to_text(TRANSFER_MULTIPLY), TRANSFER_MULTIPLY));
submenu->add_submenuitem(new VModeSubMenuItem(submenu,
mode_to_text(TRANSFER_REPLACE), TRANSFER_REPLACE));
+ submenu->add_submenuitem(new VModeSubMenuItem(submenu,
mode_to_text(TRANSFER_REFLECT), TRANSFER_REFLECT));
add_item(mode_item = new VModePatchItem(this, _("PorterDuff..."), -1));
mode_item->add_submenu(submenu = new VModePatchSubMenu(mode_item));
submenu->add_submenuitem(new VModeSubMenuItem(submenu,
mode_to_text(TRANSFER_DST), TRANSFER_DST));
@@ -436,6 +437,7 @@ const char* VModePatch::mode_to_text(int mode)
case TRANSFER_HARDLIGHT: return _("Hardlight");
case TRANSFER_SOFTLIGHT: return _("Softlight");
case TRANSFER_DIFFERENCE: return _("Difference");
+ case TRANSFER_REFLECT: return _("Reflect");
}
return _("Normal");
}
--
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