Copy a row at a time to the card instead of a pixel at a time

1 files changed, 17 insertions, 9 deletions

diff --git a/src/libply/ply-frame-buffer.c b/src/libply/ply-frame-buffer.c
index 389bbb1..daa275c 100644
--- a/src/libply/ply-frame-buffer.c
+++ b/src/libply/ply-frame-buffer.c
@@ -350,32 +350,40 @@ ply_frame_buffer_copy_to_device (ply_frame_buffer_t *buffer,
                                  unsigned long   height)
 {
   unsigned long row, column;
-  
+  char *row_buffer;
+  size_t bytes_per_row;
+
+  bytes_per_row = width * buffer->bytes_per_pixel;
+  row_buffer = malloc (buffer->row_stride * buffer->bytes_per_pixel);
   for (row = y; row < y + height; row++)
     {
+      unsigned long offset;
+
       for (column = x; column < x + width; column++)
-        { 
+        {
           uint32_t pixel_value;
           uint_fast32_t device_pixel_value;
-          unsigned long offset;
 
           pixel_value = buffer->shadow_buffer[row * buffer->row_stride + column];
 
-          device_pixel_value = 
+          device_pixel_value =
             ply_frame_buffer_pixel_value_to_device_pixel_value (buffer,
                                                                 pixel_value);
 
-          offset = row * buffer->row_stride * buffer->bytes_per_pixel + column * buffer->bytes_per_pixel;
-
-          memcpy (buffer->map_address + offset, &device_pixel_value,
-                  buffer->bytes_per_pixel);
+          memcpy (row_buffer + column * buffer->bytes_per_pixel,
+                  &device_pixel_value, buffer->bytes_per_pixel);
         }
+
+      offset = row * buffer->row_stride * buffer->bytes_per_pixel;
+      memcpy (buffer->map_address + offset, row_buffer,
+              width * buffer->bytes_per_pixel);
     }
+  free (row_buffer);
 
   return true;
 }
 
-static bool 
+static bool
 ply_frame_buffer_flush (ply_frame_buffer_t *buffer)
 {
   assert (buffer != NULL);