Reduce buffer size by a factor of 2 (image is symmetric)

1 files changed, 8 insertions, 9 deletions

diff --git a/BuddhaTest/src/Helpers.cpp b/BuddhaTest/src/Helpers.cpp
index abe09fd..881d01f 100644
--- a/BuddhaTest/src/Helpers.cpp
+++ b/BuddhaTest/src/Helpers.cpp
@@ -154,11 +154,11 @@ namespace Helpers
 		return ProgramID;

 	}

 

-    void WriteOutputPNG(const std::vector<uint32_t>& data, unsigned int width, unsigned int height)

+    void WriteOutputPNG(const std::vector<uint32_t>& data, unsigned int width, unsigned int bufferHeight)

     {

-        std::vector<png_byte> pngData(3*width*height);

-        std::vector<png_byte *> rows{height};

-        for(int i = 0; i < height ; ++i)

+        std::vector<png_byte> pngData(3*width*2*bufferHeight);

+        std::vector<png_byte *> rows{2*bufferHeight};

+        for(int i = 0; i < 2*bufferHeight ; ++i)

         {

             rows[i] = pngData.data()+3*width*i;

         }

@@ -170,14 +170,13 @@ namespace Helpers
         }

         for(unsigned int i = 0; i < data.size();++i)

         {

-            pngData[i] = (255*data[i] + (maxValue/2))/maxValue;

+            pngData[data.size() + i] = (255*data[i] + (maxValue/2))/maxValue;

         }

-        for(int i = 0; i < height/2;++i)

+        for(int i = 0; i < bufferHeight;++i)

         {

             for(int j = 0; j < width*3;++j)

             {

-                png_byte average = (rows[i][j] + rows[height-i-1][j])/2;

-                rows[i][j] = rows[height-i-1][j] = average;

+                rows[i][j] =rows[2*bufferHeight-i-1][j];

             }

         }

 

@@ -204,7 +203,7 @@ namespace Helpers
             return;

         }

         png_init_io(png_ptr, fd.Get());

-        png_set_IHDR(png_ptr, info_ptr, width, height, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);

+        png_set_IHDR(png_ptr, info_ptr, width, 2*bufferHeight, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);

 

         png_write_info(png_ptr, info_ptr);

         //header written.