From 2d7e690eb6a2add552b84370d56d56ec1b1fbfd4 Mon Sep 17 00:00:00 2001
From: Jabier Arraiza <jabier.arraiza@marker.es>
Date: Sat, 19 Oct 2019 04:33:22 +0000
Subject: Add export/import PDF blend modes and add isolation modifier

---
 src/display/cairo-utils.cpp | 123 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)

(limited to 'src/display/cairo-utils.cpp')

diff --git a/src/display/cairo-utils.cpp b/src/display/cairo-utils.cpp
index d3ca85f7e..f560b9f19 100644
--- a/src/display/cairo-utils.cpp
+++ b/src/display/cairo-utils.cpp
@@ -1252,6 +1252,129 @@ private:
     /* None */
 };
 
+unsigned ink_cairo_operator_to_css_blend(cairo_operator_t cairo_operator)
+{
+    // All of the blend modes are implemented in Cairo as of 1.10.
+    // For a detailed description, see:
+    // http://cairographics.org/operators/
+    unsigned res = SP_CSS_BLEND_NORMAL;
+    switch (cairo_operator) {
+        case CAIRO_OPERATOR_MULTIPLY:
+            res = SP_CSS_BLEND_MULTIPLY;
+            break;
+        case CAIRO_OPERATOR_SCREEN:
+            res = SP_CSS_BLEND_SCREEN;
+            break;
+        case CAIRO_OPERATOR_DARKEN:
+            res = SP_CSS_BLEND_DARKEN;
+            break;
+        case CAIRO_OPERATOR_LIGHTEN:
+            res = SP_CSS_BLEND_LIGHTEN;
+            break;
+        case CAIRO_OPERATOR_OVERLAY:
+            res = SP_CSS_BLEND_OVERLAY;
+            break;
+        case CAIRO_OPERATOR_COLOR_DODGE:
+            res = SP_CSS_BLEND_COLORDODGE;
+            break;
+        case CAIRO_OPERATOR_COLOR_BURN:
+            res = SP_CSS_BLEND_COLORBURN;
+            break;
+        case CAIRO_OPERATOR_HARD_LIGHT:
+            res = SP_CSS_BLEND_HARDLIGHT;
+            break;
+        case CAIRO_OPERATOR_SOFT_LIGHT:
+            res = SP_CSS_BLEND_SOFTLIGHT;
+            break;
+        case CAIRO_OPERATOR_DIFFERENCE:
+            res = SP_CSS_BLEND_DIFFERENCE;
+            break;
+        case CAIRO_OPERATOR_EXCLUSION:
+            res = SP_CSS_BLEND_EXCLUSION;
+            break;
+        case CAIRO_OPERATOR_HSL_HUE:
+            res = SP_CSS_BLEND_HUE;
+            break;
+        case CAIRO_OPERATOR_HSL_SATURATION:
+            res = SP_CSS_BLEND_SATURATION;
+            break;
+        case CAIRO_OPERATOR_HSL_COLOR:
+            res = SP_CSS_BLEND_COLOR;
+            break;
+        case CAIRO_OPERATOR_HSL_LUMINOSITY:
+            res = SP_CSS_BLEND_LUMINOSITY;
+            break;
+        case CAIRO_OPERATOR_OVER:
+        default:
+            res = SP_CSS_BLEND_NORMAL;
+            break;
+    }
+    return res;
+}
+
+cairo_operator_t ink_css_blend_to_cairo_operator(unsigned css_blend)
+{
+    // All of the blend modes are implemented in Cairo as of 1.10.
+    // For a detailed description, see:
+    // http://cairographics.org/operators/
+
+    cairo_operator_t res = CAIRO_OPERATOR_OVER;
+    switch (css_blend) {
+        case SP_CSS_BLEND_MULTIPLY:
+            res = CAIRO_OPERATOR_MULTIPLY;
+            break;
+        case SP_CSS_BLEND_SCREEN:
+            res = CAIRO_OPERATOR_SCREEN;
+            break;
+        case SP_CSS_BLEND_DARKEN:
+            res = CAIRO_OPERATOR_DARKEN;
+            break;
+        case SP_CSS_BLEND_LIGHTEN:
+            res = CAIRO_OPERATOR_LIGHTEN;
+            break;
+        case SP_CSS_BLEND_OVERLAY:
+            res = CAIRO_OPERATOR_OVERLAY;
+            break;
+        case SP_CSS_BLEND_COLORDODGE:
+            res = CAIRO_OPERATOR_COLOR_DODGE;
+            break;
+        case SP_CSS_BLEND_COLORBURN:
+            res = CAIRO_OPERATOR_COLOR_BURN;
+            break;
+        case SP_CSS_BLEND_HARDLIGHT:
+            res = CAIRO_OPERATOR_HARD_LIGHT;
+            break;
+        case SP_CSS_BLEND_SOFTLIGHT:
+            res = CAIRO_OPERATOR_SOFT_LIGHT;
+            break;
+        case SP_CSS_BLEND_DIFFERENCE:
+            res = CAIRO_OPERATOR_DIFFERENCE;
+            break;
+        case SP_CSS_BLEND_EXCLUSION:
+            res = CAIRO_OPERATOR_EXCLUSION;
+            break;
+        case SP_CSS_BLEND_HUE:
+            res = CAIRO_OPERATOR_HSL_HUE;
+            break;
+        case SP_CSS_BLEND_SATURATION:
+            res = CAIRO_OPERATOR_HSL_SATURATION;
+            break;
+        case SP_CSS_BLEND_COLOR:
+            res = CAIRO_OPERATOR_HSL_COLOR;
+            break;
+        case SP_CSS_BLEND_LUMINOSITY:
+            res = CAIRO_OPERATOR_HSL_LUMINOSITY;
+            break;
+        case SP_CSS_BLEND_NORMAL:
+        default:
+            res = CAIRO_OPERATOR_OVER;
+            break;
+    }
+    return res;
+}
+
+
+
 int ink_cairo_surface_linear_to_srgb(cairo_surface_t *surface)
 {
     cairo_surface_flush(surface);
-- 
cgit v1.2.3