From 56b812f22f74d848094a2b6ab79da2938457fda9 Mon Sep 17 00:00:00 2001
From: Relintai <relintai@protonmail.com>
Date: Wed, 6 Sep 2023 09:47:06 +0200
Subject: [PATCH] Fix build.

---
 modules/dds/texture_loader_dds.cpp | 62 ++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/modules/dds/texture_loader_dds.cpp b/modules/dds/texture_loader_dds.cpp
index c08e3590e..fd4fdf70f 100644
--- a/modules/dds/texture_loader_dds.cpp
+++ b/modules/dds/texture_loader_dds.cpp
@@ -32,6 +32,68 @@
 
 #include "core/os/file_access.h"
 
+#define PF_FOURCC(s) ((uint32_t)(((s)[3] << 24U) | ((s)[2] << 16U) | ((s)[1] << 8U) | ((s)[0])))
+
+// Reference: https://docs.microsoft.com/en-us/windows/win32/direct3ddds/dds-header
+
+enum {
+	DDS_MAGIC = 0x20534444,
+	DDSD_PITCH = 0x00000008,
+	DDSD_LINEARSIZE = 0x00080000,
+	DDSD_MIPMAPCOUNT = 0x00020000,
+	DDPF_FOURCC = 0x00000004,
+	DDPF_ALPHAPIXELS = 0x00000001,
+	DDPF_INDEXED = 0x00000020,
+	DDPF_RGB = 0x00000040,
+};
+
+enum DDSFormat {
+	DDS_DXT1,
+	DDS_DXT3,
+	DDS_DXT5,
+	DDS_ATI1,
+	DDS_ATI2,
+	DDS_A2XY,
+	DDS_BGRA8,
+	DDS_BGR8,
+	DDS_RGBA8, //flipped in dds
+	DDS_RGB8, //flipped in dds
+	DDS_BGR5A1,
+	DDS_BGR565,
+	DDS_BGR10A2,
+	DDS_INDEXED,
+	DDS_LUMINANCE,
+	DDS_LUMINANCE_ALPHA,
+	DDS_MAX
+};
+
+struct DDSFormatInfo {
+	const char *name;
+	bool compressed;
+	bool palette;
+	uint32_t divisor;
+	uint32_t block_size;
+	Image::Format format;
+};
+
+static const DDSFormatInfo dds_format_info[DDS_MAX] = {
+	{ "DXT1/BC1", true, false, 4, 8, Image::FORMAT_DXT1 },
+	{ "DXT3/BC2", true, false, 4, 16, Image::FORMAT_DXT3 },
+	{ "DXT5/BC3", true, false, 4, 16, Image::FORMAT_DXT5 },
+	{ "ATI1/BC4", true, false, 4, 8, Image::FORMAT_RGTC_R },
+	{ "ATI2/3DC/BC5", true, false, 4, 16, Image::FORMAT_RGTC_RG },
+	{ "A2XY/DXN/BC5", true, false, 4, 16, Image::FORMAT_RGTC_RG },
+	{ "BGRA8", false, false, 1, 4, Image::FORMAT_RGBA8 },
+	{ "BGR8", false, false, 1, 3, Image::FORMAT_RGB8 },
+	{ "RGBA8", false, false, 1, 4, Image::FORMAT_RGBA8 },
+	{ "RGB8", false, false, 1, 3, Image::FORMAT_RGB8 },
+	{ "BGR5A1", false, false, 1, 2, Image::FORMAT_RGBA8 },
+	{ "BGR565", false, false, 1, 2, Image::FORMAT_RGB8 },
+	{ "BGR10A2", false, false, 1, 4, Image::FORMAT_RGBA8 },
+	{ "GRAYSCALE", false, false, 1, 1, Image::FORMAT_L8 },
+	{ "GRAYSCALE_ALPHA", false, false, 1, 2, Image::FORMAT_LA8 }
+};
+
 RES ResourceFormatDDS::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_no_subresource_cache) {
 	if (r_error) {
 		*r_error = ERR_CANT_OPEN;