2 files changed, 28 insertions, 0 deletions
diff --git a/base/gtk_util.cc b/base/gtk_util.cc
index 79fc485..b526aca 100644
--- a/base/gtk_util.cc
+++ b/base/gtk_util.cc
@@ -4,6 +4,8 @@
 
 #include "base/gtk_util.h"
 
+#include <stdlib.h>
+
 namespace gtk_util {
 
 namespace {
@@ -46,4 +48,24 @@ std::string RemoveWindowsStyleAccelerators(const std::string& label) {
   return ConvertAmperstandsTo(label, "");
 }
 
+uint8_t* BGRAToRGBA(const uint8_t* pixels, int width, int height, int stride) {
+  if (stride == 0)
+    stride = width * 4;
+
+  uint8_t* new_pixels = static_cast<uint8_t*>(malloc(height * stride));
+
+  // We have to copy the pixels and swap from BGRA to RGBA.
+  for (int i = 0; i < height; ++i) {
+    for (int j = 0; j < width; ++j) {
+      int idx = i * stride + j * 4;
+      new_pixels[idx] = pixels[idx + 2];
+      new_pixels[idx + 1] = pixels[idx + 1];
+      new_pixels[idx + 2] = pixels[idx];
+      new_pixels[idx + 3] = pixels[idx + 3];
+    }
+  }
+
+  return new_pixels;
+}
+
 }  // namespace gtk_util
diff --git a/base/gtk_util.h b/base/gtk_util.h
index 435780d..912bfbd 100644
--- a/base/gtk_util.h
+++ b/base/gtk_util.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <string>
+#include <stdint.h>
 
 namespace gtk_util {
 
@@ -17,6 +18,11 @@ std::string ConvertAcceleratorsFromWindowsStyle(const std::string& label);
 // Removes the "&" accelerators from a Windows label.
 std::string RemoveWindowsStyleAccelerators(const std::string& label);
 
+// Makes a copy of |pixels| with the ordering changed from BGRA to RGBA.
+// The caller is responsible for free()ing the data. If |stride| is 0, it's
+// assumed to be 4 * |width|.
+uint8_t* BGRAToRGBA(const uint8_t* pixels, int width, int height, int stride);
+
 }  // namespace gtk_util
 
 #endif  // BASE_GTK_UTIL_H_