display guide anchor on canvas; anchor and angle can be edited by mouse

[inkscape.git] / src / display / nr-filter-blend.cpp

diff --git a/src/display/nr-filter-blend.cpp b/src/display/nr-filter-blend.cpp
index b02b20cbf6d8eddcfbaa2e97bf400d40d1865128..4645d9bc063a8bf0493e202e0b54ff4f5f0365b3 100644 (file)
--- a/src/display/nr-filter-blend.cpp
+++ b/src/display/nr-filter-blend.cpp
@@ -8,8 +8,9 @@
  *
  * Authors:
  *   Niko Kiirala <niko@kiirala.com>
+ *   Jasper van de Gronde <th.v.d.gronde@hccnet.nl>
  *
- * Copyright (C) 2007 authors
+ * Copyright (C) 2007-2008 authors
  *
  * Released under GNU GPL, read the file 'COPYING' for more information
  */
@@ -19,12 +20,13 @@
 #include "display/nr-filter-primitive.h"
 #include "display/nr-filter-slot.h"
 #include "display/nr-filter-types.h"
+#include "display/nr-filter-units.h"
 #include "libnr/nr-pixblock.h"
-#include "libnr/nr-matrix.h"
 #include "libnr/nr-blit.h"
 #include "libnr/nr-pixops.h"
 
-namespace NR {
+namespace Inkscape {
+namespace Filters {
 
 /*
  * From http://www.w3.org/TR/SVG11/filters.html#feBlend
@@ -56,9 +58,9 @@ namespace NR {
 inline void
 blend_normal(unsigned char *r, unsigned char const *a, unsigned char const *b)
 {
-    r[0] = NR_NORMALIZE_21((255 - a[3]) * b[0]) + a[0];
-    r[1] = NR_NORMALIZE_21((255 - a[3]) * b[1]) + a[1];
-    r[2] = NR_NORMALIZE_21((255 - a[3]) * b[2]) + a[2];
+    r[0] = NR_COMPOSEPPP_1111(a[0],a[3],b[0]);
+    r[1] = NR_COMPOSEPPP_1111(a[1],a[3],b[1]);
+    r[2] = NR_COMPOSEPPP_1111(a[2],a[3],b[2]);
     SET_ALPHA;
 }
 
@@ -79,9 +81,9 @@ blend_multiply(unsigned char *r, unsigned char const *a, unsigned char const *b)
 inline void
 blend_screen(unsigned char *r, unsigned char const *a, unsigned char const *b)
 {
-    r[0] = NR_NORMALIZE_21(b[0] * 255 + a[0] * 255 - a[0] * b[0]);
-    r[1] = NR_NORMALIZE_21(b[1] * 255 + a[1] * 255 - a[1] * b[1]);
-    r[2] = NR_NORMALIZE_21(b[2] * 255 + a[2] * 255 - a[2] * b[2]);
+    r[0] = NR_NORMALIZE_21((b[0] + a[0]) * 255 - a[0] * b[0]);
+    r[1] = NR_NORMALIZE_21((b[1] + a[1]) * 255 - a[1] * b[1]);
+    r[2] = NR_NORMALIZE_21((b[2] + a[2]) * 255 - a[2] * b[2]);
     SET_ALPHA;
 }
 
@@ -89,12 +91,12 @@ blend_screen(unsigned char *r, unsigned char const *a, unsigned char const *b)
 inline void
 blend_darken(unsigned char *r, unsigned char const *a, unsigned char const *b)
 {
-    r[0] = std::min(NR_NORMALIZE_21((255 - a[3]) * b[0]) + a[0],
-                    NR_NORMALIZE_21((255 - b[3]) * a[0]) + b[0]);
-    r[1] = std::min(NR_NORMALIZE_21((255 - a[3]) * b[1]) + a[1],
-                    NR_NORMALIZE_21((255 - b[3]) * a[1]) + b[1]);
-    r[2] = std::min(NR_NORMALIZE_21((255 - a[3]) * b[2]) + a[2],
-                    NR_NORMALIZE_21((255 - b[3]) * a[2]) + b[2]);
+    r[0] = NR_NORMALIZE_21(std::min(NR_COMPOSEPPP_1112(a[0],a[3],b[0]),
+                                    NR_COMPOSEPPP_1112(b[0],b[3],a[0])));
+    r[1] = NR_NORMALIZE_21(std::min(NR_COMPOSEPPP_1112(a[1],a[3],b[1]),
+                                    NR_COMPOSEPPP_1112(b[1],b[3],a[1])));
+    r[2] = NR_NORMALIZE_21(std::min(NR_COMPOSEPPP_1112(a[2],a[3],b[2]),
+                                    NR_COMPOSEPPP_1112(b[2],b[3],a[2])));
     SET_ALPHA;
 }
 
@@ -102,12 +104,12 @@ blend_darken(unsigned char *r, unsigned char const *a, unsigned char const *b)
 inline void
 blend_lighten(unsigned char *r, unsigned char const *a, unsigned char const *b)
 {
-    r[0] = std::max(NR_NORMALIZE_21((255 - a[3]) * b[0]) + a[0],
-                    NR_NORMALIZE_21((255 - b[3]) * a[0]) + b[0]);
-    r[1] = std::max(NR_NORMALIZE_21((255 - a[3]) * b[1]) + a[1],
-                    NR_NORMALIZE_21((255 - b[3]) * a[1]) + b[1]);
-    r[2] = std::max(NR_NORMALIZE_21((255 - a[3]) * b[2]) + a[2],
-                    NR_NORMALIZE_21((255 - b[3]) * a[2]) + b[2]);
+    r[0] = NR_NORMALIZE_21(std::max(NR_COMPOSEPPP_1112(a[0],a[3],b[0]),
+                                    NR_COMPOSEPPP_1112(b[0],b[3],a[0])));
+    r[1] = NR_NORMALIZE_21(std::max(NR_COMPOSEPPP_1112(a[1],a[3],b[1]),
+                                    NR_COMPOSEPPP_1112(b[1],b[3],a[1])));
+    r[2] = NR_NORMALIZE_21(std::max(NR_COMPOSEPPP_1112(a[2],a[3],b[2]),
+                                    NR_COMPOSEPPP_1112(b[2],b[3],a[2])));
     SET_ALPHA;
 }
 
@@ -123,7 +125,7 @@ FilterPrimitive * FilterBlend::create() {
 FilterBlend::~FilterBlend()
 {}
 
-int FilterBlend::render(FilterSlot &slot, Matrix const &trans) {
+int FilterBlend::render(FilterSlot &slot, FilterUnits const & /*units*/) {
     NRPixBlock *in1 = slot.get(_input);
     NRPixBlock *in2 = slot.get(_input2);
     NRPixBlock *original_in1 = in1;
@@ -218,7 +220,8 @@ void FilterBlend::set_mode(FilterBlendMode mode) {
     }
 }
 
-} /* namespace NR */
+} /* namespace Filters */
+} /* namespace Inkscape */
 
 /*
   Local Variables: