Considering gamma correction when scaling images.

1 files changed, 15 insertions, 1 deletions

diff --git a/dw/fltkimgbuf.hh b/dw/fltkimgbuf.hh
index f7455807..81419494 100644
--- a/dw/fltkimgbuf.hh
+++ b/dw/fltkimgbuf.hh
@@ -11,6 +11,13 @@ namespace fltk {
 class FltkImgbuf: public core::Imgbuf
 {
 private:
+   class GammaCorrectionTable: public lout::object::Object
+   {
+   public:
+      double gamma;
+      uchar map[256];
+   };
+
    FltkImgbuf *root;
    int refCount;
    bool deleteOnUnref;
@@ -29,6 +36,12 @@ private:
    // the image buffer.
    lout::misc::BitSet *copiedRows;
 
+   static lout::container::typed::Vector <GammaCorrectionTable>
+      *gammaCorrectionTables;
+
+   static uchar *findGammaCorrectionTable (double gamma);
+   static bool excessiveImageDimensions (int width, int height);
+
    FltkImgbuf (Type type, int width, int height, double gamma,
                FltkImgbuf *root);
    void init (Type type, int width, int height, double gamma, FltkImgbuf *root);
@@ -49,7 +62,8 @@ public:
    inline void scaleRowBeautiful (int row, const core::byte *data);
    inline static void scaleBuffer (const core::byte *src, int srcWidth,
                                    int srcHeight, core::byte *dest,
-                                   int destWidth, int destHeight, int bpp);
+                                   int destWidth, int destHeight, int bpp,
+                                   double gamma);
 
    void newScan ();
    void copyRow (int row, const core::byte *data);