ETCPAK expects BGRA data for ETC

2 files changed, 14 insertions, 0 deletions

diff --git a/core/io/image.cpp b/core/io/image.cpp
index 21146dd80c..1b9538794a 100644
--- a/core/io/image.cpp
+++ b/core/io/image.cpp
@@ -3798,6 +3798,19 @@ void Image::convert_ra_rgba8_to_rg() {
 	}
 }
 
+void Image::convert_rgba8_to_bgra8() {
+	ERR_FAIL_COND(format != FORMAT_RGBA8);
+	ERR_FAIL_COND(!data.size());
+
+	int s = data.size();
+	uint8_t *w = data.ptrw();
+	for (int i = 0; i < s; i += 4) {
+		uint8_t r = w[i];
+		w[i] = w[i + 2]; // Swap R to B
+		w[i + 2] = r; // Swap B to R
+	}
+}
+
 Error Image::_load_from_buffer(const Vector<uint8_t> &p_array, ImageMemLoadFunc p_loader) {
 	int buffer_size = p_array.size();
 
diff --git a/core/io/image.h b/core/io/image.h
index 62df81e7c8..ad5c0b4a04 100644
--- a/core/io/image.h
+++ b/core/io/image.h
@@ -391,6 +391,7 @@ public:
 
 	void convert_rg_to_ra_rgba8();
 	void convert_ra_rgba8_to_rg();
+	void convert_rgba8_to_bgra8();
 
 	Image(const uint8_t *p_mem_png_jpg, int p_len = -1);
 	Image(const char **p_xpm);