From 0a927854a10e1e6b9770a81e2e1d9f3093631757 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Wed, 19 Jun 2013 15:29:44 +0200
Subject: Rearrange source files.

---
 source/fitz/transition.c | 165 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 source/fitz/transition.c

(limited to 'source/fitz/transition.c')

diff --git a/source/fitz/transition.c b/source/fitz/transition.c
new file mode 100644
index 00000000..92582253
--- /dev/null
+++ b/source/fitz/transition.c
@@ -0,0 +1,165 @@
+#include "mupdf/fitz.h"
+
+static int
+fade(fz_pixmap *tpix, fz_pixmap *opix, fz_pixmap *npix, int time)
+{
+	unsigned char *t, *o, *n;
+	int size;
+
+	if (!tpix || !opix || !npix || tpix->w != opix->w || opix->w != npix->w || tpix->h != opix->h || opix->h != npix->h || tpix->n != opix->n || opix->n != npix->n)
+		return 0;
+	size = tpix->w * tpix->h * tpix->n;
+	t = tpix->samples;
+	o = opix->samples;
+	n = npix->samples;
+	while (size-- > 0)
+	{
+		int op = *o++;
+		int np = *n++;
+		*t++ = ((op<<8) + ((np-op) * time) + 0x80)>>8;
+	}
+	return 1;
+}
+
+static int
+blind_horiz(fz_pixmap *tpix, fz_pixmap *opix, fz_pixmap *npix, int time)
+{
+	unsigned char *t, *o, *n;
+	int blind_height, span, position, y;
+
+	if (!tpix || !opix || !npix || tpix->w != opix->w || opix->w != npix->w || tpix->h != opix->h || opix->h != npix->h || tpix->n != opix->n || opix->n != npix->n)
+		return 0;
+	span = tpix->w * tpix->n;
+	blind_height = (tpix->h+7) / 8;
+	position = blind_height * time / 256;
+	t = tpix->samples;
+	o = opix->samples;
+	n = npix->samples;
+	for (y = 0; y < tpix->h; y++)
+	{
+		memcpy(t, ((y % blind_height) <= position ? n : o), span);
+		t += span;
+		o += span;
+		n += span;
+	}
+	return 1;
+}
+
+static int
+blind_vertical(fz_pixmap *tpix, fz_pixmap *opix, fz_pixmap *npix, int time)
+{
+	unsigned char *t, *o, *n;
+	int blind_width, span, position, y;
+
+	if (!tpix || !opix || !npix || tpix->w != opix->w || opix->w != npix->w || tpix->h != opix->h || opix->h != npix->h || tpix->n != opix->n || opix->n != npix->n)
+		return 0;
+	span = tpix->w * tpix->n;
+	blind_width = (tpix->w+7) / 8;
+	position = blind_width * time / 256;
+	blind_width *= tpix->n;
+	position *= tpix->n;
+	t = tpix->samples;
+	o = opix->samples;
+	n = npix->samples;
+	for (y = 0; y < tpix->h; y++)
+	{
+		int w, x;
+		x = 0;
+		while ((w = span - x) > 0)
+		{
+			int p;
+			if (w > blind_width)
+				w = blind_width;
+			p = position;
+			if (p > w)
+				p = w;
+			memcpy(t, n, p);
+			memcpy(t+position, o+position, w - p);
+			x += blind_width;
+			t += w;
+			o += w;
+			n += w;
+		}
+	}
+	return 1;
+}
+
+static int
+wipe_tb(fz_pixmap *tpix, fz_pixmap *opix, fz_pixmap *npix, int time)
+{
+	unsigned char *t, *o, *n;
+	int span, position, y;
+
+	if (!tpix || !opix || !npix || tpix->w != opix->w || opix->w != npix->w || tpix->h != opix->h || opix->h != npix->h || tpix->n != opix->n || opix->n != npix->n)
+		return 0;
+	span = tpix->w * tpix->n;
+	position = tpix->h * time / 256;
+	t = tpix->samples;
+	o = opix->samples;
+	n = npix->samples;
+	for (y = 0; y < position; y++)
+	{
+		memcpy(t, n, span);
+		t += span;
+		o += span;
+		n += span;
+	}
+	for (; y < tpix->h; y++)
+	{
+		memcpy(t, o, span);
+		t += span;
+		o += span;
+		n += span;
+	}
+	return 1;
+}
+
+static int
+wipe_lr(fz_pixmap *tpix, fz_pixmap *opix, fz_pixmap *npix, int time)
+{
+	unsigned char *t, *o, *n;
+	int span, position, y;
+
+	if (!tpix || !opix || !npix || tpix->w != opix->w || opix->w != npix->w || tpix->h != opix->h || opix->h != npix->h || tpix->n != opix->n || opix->n != npix->n)
+		return 0;
+	span = tpix->w * tpix->n;
+	position = tpix->w * time / 256;
+	position *= tpix->n;
+	t = tpix->samples;
+	o = opix->samples + position;
+	n = npix->samples;
+	for (y = 0; y < tpix->h; y++)
+	{
+		memcpy(t, n, position);
+		memcpy(t+position, o, span-position);
+		t += span;
+		o += span;
+		n += span;
+	}
+	return 1;
+}
+
+int fz_generate_transition(fz_pixmap *tpix, fz_pixmap *opix, fz_pixmap *npix, int time, fz_transition *trans)
+{
+	switch (trans->type)
+	{
+	default:
+	case FZ_TRANSITION_FADE:
+		return fade(tpix, opix, npix, time);
+	case FZ_TRANSITION_BLINDS:
+		if (trans->vertical)
+			return blind_vertical(tpix, opix, npix, time);
+		else
+			return blind_horiz(tpix, opix, npix, time);
+	case FZ_TRANSITION_WIPE:
+		switch (((trans->direction + 45 + 360) % 360) / 90)
+		{
+		default:
+		case 0: return wipe_lr(tpix, opix, npix, time);
+		case 1: return wipe_tb(tpix, npix, opix, 256-time);
+		case 2: return wipe_lr(tpix, npix, opix, 256-time);
+		case 3: return wipe_tb(tpix, opix, npix, time);
+		}
+	}
+	return 0;
+}
-- 
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