Remove unneeded type casts when using Leptonica macro GET_DATA_BYTE

The first parameter is casted to an unsigned byte by Leptonica,
so we don't need additional type casts in Tesseract code.

Signed-off-by: Stefan Weil <sw@weilnetz.de>

Author: stweil

ccmain/thresholder.cpp

@@ -311,8 +311,7 @@ void ImageThresholder::ThresholdRectToPix(Pix* src_pix,
     for (int x = 0; x < rect_width_; ++x) {
       bool white_result = true;
       for (int ch = 0; ch < num_channels; ++ch) {
-        int pixel = GET_DATA_BYTE(const_cast<void*>(
-                                  static_cast<const void *>(linedata)),
+        int pixel = GET_DATA_BYTE(linedata,
                                   (x + rect_left_) * num_channels + ch);
         if (hi_values[ch] >= 0 &&
             (pixel > thresholds[ch]) == (hi_values[ch] == 0)) {

ccstruct/coutln.cpp

@@ -654,24 +654,19 @@ static void ComputeGradient(const l_uint32* data, int wpl,
   const l_uint32* line = data + y * wpl;
   int pix_x_y =
       x < width && y < height
-          ? GET_DATA_BYTE(
-                const_cast<void*>(static_cast<const void*>(line)), x)
+          ? GET_DATA_BYTE(line, x)
           : 255;
   int pix_x_prevy =
       x < width && y > 0
-          ? GET_DATA_BYTE(
-                const_cast<void*>(static_cast<const void*>(line - wpl)), x)
+          ? GET_DATA_BYTE(line - wpl, x)
           : 255;
   int pix_prevx_prevy =
       x > 0 && y > 0
-          ? GET_DATA_BYTE(
-                const_cast<void*>(static_cast<void const*>(line - wpl)),
-                x - 1)
+          ? GET_DATA_BYTE(line - wpl, x - 1)
           : 255;
   int pix_prevx_y =
       x > 0 && y < height
-          ? GET_DATA_BYTE(
-                const_cast<void*>(static_cast<const void*>(line)), x - 1)
+          ? GET_DATA_BYTE(line, x - 1)
           : 255;
   gradient->set_x(pix_x_y + pix_x_prevy - (pix_prevx_y + pix_prevx_prevy));
   gradient->set_y(pix_x_prevy + pix_prevx_prevy - (pix_x_y + pix_prevx_y));
@@ -688,10 +683,8 @@ static bool EvaluateVerticalDiff(const l_uint32* data, int wpl, int diff_sign,
   if (y <= 0 || y >= height)
     return false;
   const l_uint32* line = data + y * wpl;
-  int pixel1 = GET_DATA_BYTE(
-      const_cast<void*>(static_cast<const void*>(line - wpl)), x);
-  int pixel2 =
-      GET_DATA_BYTE(const_cast<void*>(static_cast<const void*>(line)), x);
+  int pixel1 = GET_DATA_BYTE(line - wpl, x);
+  int pixel2 = GET_DATA_BYTE(line, x);
   int diff = (pixel2 - pixel1) * diff_sign;
   if (diff > *best_diff) {
     *best_diff = diff;
@@ -711,10 +704,8 @@ static bool EvaluateHorizontalDiff(const l_uint32* line, int diff_sign,
                                    int* best_diff, int* best_sum, int* best_x) {
   if (x <= 0 || x >= width)
     return false;
-  int pixel1 = GET_DATA_BYTE(
-      const_cast<void*>(static_cast<const void*>(line)), x - 1);
-  int pixel2 =
-      GET_DATA_BYTE(const_cast<void*>(static_cast<const void*>(line)), x);
+  int pixel1 = GET_DATA_BYTE(line, x - 1);
+  int pixel2 = GET_DATA_BYTE(line, x);
   int diff = (pixel2 - pixel1) * diff_sign;
   if (diff > *best_diff) {
     *best_diff = diff;

ccstruct/otsuthr.cpp

@@ -161,9 +161,8 @@ void HistogramRect(Pix* src_pix, int channel,
   for (int y = top; y < bottom; ++y) {
     const l_uint32* linedata = srcdata + y * src_wpl;
     for (int x = 0; x < width; ++x) {
-      int pixel = GET_DATA_BYTE(const_cast<void*>(
-          static_cast<const void *>(linedata)),
-          (x + left) * num_channels + channel);
+      int pixel = GET_DATA_BYTE(linedata,
+                                (x + left) * num_channels + channel);
       ++histogram[pixel];
     }
   }