From 2ceb40f4b800b836266c51b51064e767e9b46ffc Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ghostscript.com>
Date: Wed, 14 Jul 2010 03:15:54 +0200
Subject: Add transparency functions to the trace device.

---
 fitz/dev_trace.c | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

(limited to 'fitz')

diff --git a/fitz/dev_trace.c b/fitz/dev_trace.c
index ebf28535..b51015f8 100644
--- a/fitz/dev_trace.c
+++ b/fitz/dev_trace.c
@@ -15,7 +15,7 @@ fz_tracecolor(fz_colorspace *colorspace, float *color, float alpha)
 	for (i = 0; i < colorspace->n; i++)
 		printf("%s%g", i == 0 ? "" : " ", color[i]);
 	printf("\" ");
-	if (alpha < 1.0f)
+	if (alpha < 1)
 		printf("alpha=\"%g\" ", alpha);
 }
 
@@ -227,7 +227,35 @@ fz_tracepopclip(void *user)
 	printf("</gsave>\n");
 }
 
-/* TODO: transparency group functions */
+static void
+fz_tracebeginmask(void *user, fz_rect bbox, int luminosity, fz_colorspace *colorspace, float *color)
+{
+	printf("<mask bbox=\"%g %g %g %g\" s=\"%s\" ",
+		bbox.x0, bbox.y0, bbox.x1, bbox.y1,
+		luminosity ? "luminosity" : "alpha");
+	fz_tracecolor(colorspace, color, 1);
+	printf(">\n");
+}
+
+static void
+fz_traceendmask(void *user)
+{
+	printf("</mask>\n");
+}
+
+static void
+fz_tracebegingroup(void *user, fz_rect bbox, fz_colorspace *colorspace, int isolated, int knockout, fz_blendmode blendmode)
+{
+	printf("<group bbox=\"%g %g %g %g\" isolated=\"%d\" knockout=\"%d\" blendmode=\"%d\">\n",
+		bbox.x0, bbox.y0, bbox.x1, bbox.y1,
+		isolated, knockout, blendmode);
+}
+
+static void
+fz_traceendgroup(void *user)
+{
+	printf("</group>\n");
+}
 
 fz_device *fz_newtracedevice(void)
 {
@@ -251,6 +279,11 @@ fz_device *fz_newtracedevice(void)
 
 	dev->popclip = fz_tracepopclip;
 
+	dev->beginmask = fz_tracebeginmask;
+	dev->endmask = fz_traceendmask;
+	dev->begingroup = fz_tracebegingroup;
+	dev->endgroup = fz_traceendgroup;
+
 	return dev;
 }
 
-- 
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