From 9a7768a58a938b84860b0f8a3327e82b731cdc0c Mon Sep 17 00:00:00 2001
From: Adrian Johnson <ajohnson@redneon.com>
Date: Fri, 25 Jan 2013 22:24:50 +1030
Subject: [PATCH] cairo: support uncolored tiling patterns

Bug 59179
---
 poppler/CairoOutputDev.cc |   26 ++++++++++++++++++++++++++
 poppler/CairoOutputDev.h  |    1 +
 2 files changed, 27 insertions(+)

diff --git a/poppler/CairoOutputDev.cc b/poppler/CairoOutputDev.cc
index 10df30c..eafd841 100644
--- a/poppler/CairoOutputDev.cc
+++ b/poppler/CairoOutputDev.cc
@@ -144,6 +144,7 @@ CairoOutputDev::CairoOutputDev() {
   prescaleImages = gTrue;
   printing = gTrue;
   use_show_text_glyphs = gFalse;
+  inUncoloredPattern = gFalse;
   inType3Char = gFalse;
   t3_glyph_has_bbox = gFalse;
 
@@ -461,6 +462,10 @@ void CairoOutputDev::updateLineWidth(GfxState *state) {
 void CairoOutputDev::updateFillColor(GfxState *state) {
   GfxRGB color = fill_color;
 
+  if (inUncoloredPattern) {
+    return;
+  }
+
   state->getFillRGB(&fill_color);
   if (cairo_pattern_get_type (fill_pattern) != CAIRO_PATTERN_TYPE_SOLID ||
       color.r != fill_color.r ||
@@ -481,6 +486,10 @@ void CairoOutputDev::updateFillColor(GfxState *state) {
 void CairoOutputDev::updateStrokeColor(GfxState *state) {
   GfxRGB color = stroke_color;
 
+  if (inUncoloredPattern) {
+    return;
+  }
+
   state->getStrokeRGB(&stroke_color);
   if (cairo_pattern_get_type (fill_pattern) != CAIRO_PATTERN_TYPE_SOLID ||
       color.r != stroke_color.r ||
@@ -501,6 +510,10 @@ void CairoOutputDev::updateStrokeColor(GfxState *state) {
 void CairoOutputDev::updateFillOpacity(GfxState *state) {
   double opacity = fill_opacity;
 
+  if (inUncoloredPattern) {
+    return;
+  }
+
   fill_opacity = state->getFillOpacity();
   if (opacity != fill_opacity) {
     cairo_pattern_destroy(fill_pattern);
@@ -516,6 +529,10 @@ void CairoOutputDev::updateFillOpacity(GfxState *state) {
 void CairoOutputDev::updateStrokeOpacity(GfxState *state) {
   double opacity = stroke_opacity;
 
+  if (inUncoloredPattern) {
+    return;
+  }
+
   stroke_opacity = state->getStrokeOpacity();
   if (opacity != stroke_opacity) {
     cairo_pattern_destroy(stroke_pattern);
@@ -529,6 +546,9 @@ void CairoOutputDev::updateStrokeOpacity(GfxState *state) {
 }
 
 void CairoOutputDev::updateFillColorStop(GfxState *state, double offset) {
+  if (inUncoloredPattern) {
+    return;
+  }
   state->getFillRGB(&fill_color);
 
   cairo_pattern_add_color_stop_rgba(fill_pattern, offset,
@@ -852,7 +872,13 @@ GBool CairoOutputDev::tilingPatternFill(GfxState *state, Gfx *gfxA, Catalog *cat
   strokePathTmp = strokePathClip;
   strokePathClip = NULL;
   gfx = new Gfx(doc, this, resDict, &box, NULL, NULL, NULL, gfxA->getXRef());
+  if (paintType == 2) {
+    inUncoloredPattern = gTrue;
+  }
   gfx->display(str);
+  if (paintType == 2) {
+    inUncoloredPattern = gFalse;
+  }
   delete gfx;
   strokePathClip = strokePathTmp;
 
diff --git a/poppler/CairoOutputDev.h b/poppler/CairoOutputDev.h
index 2ac1fd5..e2cdf16 100644
--- a/poppler/CairoOutputDev.h
+++ b/poppler/CairoOutputDev.h
@@ -320,6 +320,7 @@ protected:
   int utf8Count;
   int utf8Max;
   cairo_path_t *textClipPath;
+  GBool inUncoloredPattern;     // inside a uncolored pattern (PaintType = 2)
   GBool inType3Char;		// inside a Type 3 CharProc
   double t3_glyph_wx, t3_glyph_wy;
   GBool t3_glyph_has_bbox;
-- 
1.7.10.4