[Vulkan] Reimplemented texture conversions. Here be dragons! Probably breaks everything. Also bonus DXT3A support.

src/xenia/gpu/texture_conversion.h

@@ -0,0 +1,56 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2014 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_GPU_TEXTURE_CONVERSION_H_
+#define XENIA_GPU_TEXTURE_CONVERSION_H_
+
+#include <cstring>
+#include <functional>
+#include <memory>
+
+#include "xenia/base/assert.h"
+#include "xenia/gpu/texture_info.h"
+#include "xenia/gpu/xenos.h"
+
+namespace xe {
+namespace gpu {
+namespace texture_conversion {
+
+typedef std::function<void(Endian, void*, const void*, size_t)>
+    CopyBlockCallback;
+
+void CopySwapBlock(Endian endian, void* output, const void* input,
+                   size_t length);
+void ConvertTexelCTX1ToR8G8(Endian endian, void* output, const void* input,
+                            size_t length);
+void ConvertTexelDXT3AToDXT3(Endian endian, void* output, const void* input,
+                             size_t length);
+
+typedef std::function<void(void*, const void*, size_t)> UntileCopyBlockCallback;
+
+typedef struct UntileInfo {
+  uint32_t offset_x;
+  uint32_t offset_y;
+  uint32_t width;
+  uint32_t height;
+  uint32_t input_pitch;
+  uint32_t output_pitch;
+  const FormatInfo* input_format_info;
+  const FormatInfo* output_format_info;
+  UntileCopyBlockCallback copy_callback;
+} UntileInfo;
+
+void Untile(uint8_t* output_buffer, const uint8_t* input_buffer,
+            const UntileInfo* untile_info);
+
+}  // namespace texture_conversion
+}  // namespace gpu
+}  // namespace xe
+
+#endif  // XENIA_GPU_TEXTURE_CONVERSION_H_