1 files changed, 1 insertions, 84 deletions
diff --git a/core/fxge/dib/fx_dib_main.cpp b/core/fxge/dib/fx_dib_main.cpp
index ad6ee0c4e7..85df71e11d 100644
--- a/core/fxge/dib/fx_dib_main.cpp
+++ b/core/fxge/dib/fx_dib_main.cpp
@@ -1371,90 +1371,7 @@ FX_BOOL CFX_DIBitmap::ConvertColorScale(uint32_t forecolor,
   }
   return TRUE;
 }
-FX_BOOL CFX_DIBitmap::DitherFS(const uint32_t* pPalette,
-                               int pal_size,
-                               const FX_RECT* pRect) {
-  if (!m_pBuffer) {
-    return FALSE;
-  }
-  if (m_bpp != 8 && m_pPalette && m_AlphaFlag != 0) {
-    return FALSE;
-  }
-  if (m_Width < 4 && m_Height < 4) {
-    return FALSE;
-  }
-  FX_RECT rect(0, 0, m_Width, m_Height);
-  if (pRect) {
-    rect.Intersect(*pRect);
-  }
-  uint8_t translate[256];
-  for (int i = 0; i < 256; i++) {
-    int err2 = 65536;
-    for (int j = 0; j < pal_size; j++) {
-      uint8_t entry = (uint8_t)pPalette[j];
-      int err = (int)entry - i;
-      if (err * err < err2) {
-        err2 = err * err;
-        translate[i] = entry;
-      }
-    }
-  }
-  for (int row = rect.top; row < rect.bottom; row++) {
-    uint8_t* scan = m_pBuffer + row * m_Pitch;
-    uint8_t* next_scan = m_pBuffer + (row + 1) * m_Pitch;
-    for (int col = rect.left; col < rect.right; col++) {
-      int src_pixel = scan[col];
-      int dest_pixel = translate[src_pixel];
-      scan[col] = (uint8_t)dest_pixel;
-      int error = -dest_pixel + src_pixel;
-      if (col < rect.right - 1) {
-        int src = scan[col + 1];
-        src += error * 7 / 16;
-        if (src > 255) {
-          scan[col + 1] = 255;
-        } else if (src < 0) {
-          scan[col + 1] = 0;
-        } else {
-          scan[col + 1] = src;
-        }
-      }
-      if (col < rect.right - 1 && row < rect.bottom - 1) {
-        int src = next_scan[col + 1];
-        src += error * 1 / 16;
-        if (src > 255) {
-          next_scan[col + 1] = 255;
-        } else if (src < 0) {
-          next_scan[col + 1] = 0;
-        } else {
-          next_scan[col + 1] = src;
-        }
-      }
-      if (row < rect.bottom - 1) {
-        int src = next_scan[col];
-        src += error * 5 / 16;
-        if (src > 255) {
-          next_scan[col] = 255;
-        } else if (src < 0) {
-          next_scan[col] = 0;
-        } else {
-          next_scan[col] = src;
-        }
-      }
-      if (col > rect.left && row < rect.bottom - 1) {
-        int src = next_scan[col - 1];
-        src += error * 3 / 16;
-        if (src > 255) {
-          next_scan[col - 1] = 255;
-        } else if (src < 0) {
-          next_scan[col - 1] = 0;
-        } else {
-          next_scan[col - 1] = src;
-        }
-      }
-    }
-  }
-  return TRUE;
-}
+
 CFX_DIBitmap* CFX_DIBSource::FlipImage(FX_BOOL bXFlip, FX_BOOL bYFlip) const {
   CFX_DIBitmap* pFlipped = new CFX_DIBitmap;
   if (!pFlipped->Create(m_Width, m_Height, GetFormat())) {