Corrections of gamma.

5 files changed, 7 insertions, 7 deletions

diff --git a/dw/fltkimgbuf.cc b/dw/fltkimgbuf.cc
index 4b93601f..56a673fa 100644
--- a/dw/fltkimgbuf.cc
+++ b/dw/fltkimgbuf.cc
@@ -91,8 +91,8 @@ void FltkImgbuf::init (Type type, int width, int height, double gamma,
       case RGB:  bpp = 3; break;
       default:   bpp = 1; break;
       }
-      _MSG("FltkImgbuf::init width=%d height=%d bpp=%d gamma=%g\n",
-           width, height, bpp, gamma);
+      MSG("FltkImgbuf::init width=%d height=%d bpp=%d gamma=%g\n",
+          width, height, bpp, gamma);
       rawdata = new uchar[bpp * width * height];
       // Set light-gray as interim background color.
       memset(rawdata, 222, width*height*bpp);
diff --git a/dw/platform.hh b/dw/platform.hh
index 532f4cf9..227cda33 100644
--- a/dw/platform.hh
+++ b/dw/platform.hh
@@ -149,8 +149,7 @@ public:
    /**
     * \brief Create a (platform speficic) image buffer.
     *
-    * "gamma" is the value by which the image data is already
-    * corrected.
+    * "gamma" is the value by which the image data is gamma-encoded.
     */
    virtual Imgbuf *createImgbuf (Imgbuf::Type type, int width, int height,
                                  double gamma) = 0;
diff --git a/src/gif.c b/src/gif.c
index a4233267..69fcf5d3 100644
--- a/src/gif.c
+++ b/src/gif.c
@@ -816,7 +816,8 @@ static size_t Gif_do_img_desc(DilloGif *gif, void *Buf,
 
    /** \todo Gamma for GIF? */
    a_Dicache_set_parms(gif->url, gif->version, gif->Image,
-                       gif->Width, gif->Height, DILLO_IMG_TYPE_INDEXED, 2.2);
+                       gif->Width, gif->Height, DILLO_IMG_TYPE_INDEXED,
+                       1 / 2.2);
 
    Flags = buf[8];
 
diff --git a/src/jpeg.c b/src/jpeg.c
index 7efdbfbb..625808fb 100644
--- a/src/jpeg.c
+++ b/src/jpeg.c
@@ -303,7 +303,7 @@ static void Jpeg_write(DilloJpeg *jpeg, void *Buf, uint_t BufSize)
          a_Dicache_set_parms(jpeg->url, jpeg->version, jpeg->Image,
                              (uint_t)jpeg->cinfo.image_width,
                              (uint_t)jpeg->cinfo.image_height,
-                             type, 2.2);
+                             type, 1 / 2.2);
 
          /* decompression step 4 (see libjpeg.doc) */
          jpeg->state = DILLO_JPEG_STARTING;
diff --git a/src/png.c b/src/png.c
index 767df994..44d55733 100644
--- a/src/png.c
+++ b/src/png.c
@@ -204,7 +204,7 @@ Png_datainfo_callback(png_structp png_ptr, png_infop info_ptr)
    /** \todo Gamma for PNG? */
    a_Dicache_set_parms(png->url, png->version, png->Image,
                        (uint_t)png->width, (uint_t)png->height,
-                       DILLO_IMG_TYPE_RGB, 2.2);
+                       DILLO_IMG_TYPE_RGB, 1 / 2.2);
 }
 
 static void