1 files changed, 55 insertions, 0 deletions

diff --git a/src/video_core/framebuffer_config.cpp b/src/video_core/framebuffer_config.cpp
new file mode 100644
index 000000000..e28d41f84
--- /dev/null
+++ b/src/video_core/framebuffer_config.cpp
@@ -0,0 +1,55 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/assert.h"
+#include "video_core/framebuffer_config.h"
+
+namespace Tegra {
+
+Common::Rectangle<f32> NormalizeCrop(const FramebufferConfig& framebuffer, u32 texture_width,
+                                     u32 texture_height) {
+    f32 left, top, right, bottom;
+
+    if (!framebuffer.crop_rect.IsEmpty()) {
+        // If crop rectangle is not empty, apply properties from rectangle.
+        left = static_cast<f32>(framebuffer.crop_rect.left);
+        top = static_cast<f32>(framebuffer.crop_rect.top);
+        right = static_cast<f32>(framebuffer.crop_rect.right);
+        bottom = static_cast<f32>(framebuffer.crop_rect.bottom);
+    } else {
+        // Otherwise, fall back to framebuffer dimensions.
+        left = 0;
+        top = 0;
+        right = static_cast<f32>(framebuffer.width);
+        bottom = static_cast<f32>(framebuffer.height);
+    }
+
+    // Apply transformation flags.
+    auto framebuffer_transform_flags = framebuffer.transform_flags;
+
+    if (True(framebuffer_transform_flags & Service::android::BufferTransformFlags::FlipH)) {
+        // Switch left and right.
+        std::swap(left, right);
+    }
+    if (True(framebuffer_transform_flags & Service::android::BufferTransformFlags::FlipV)) {
+        // Switch top and bottom.
+        std::swap(top, bottom);
+    }
+
+    framebuffer_transform_flags &= ~Service::android::BufferTransformFlags::FlipH;
+    framebuffer_transform_flags &= ~Service::android::BufferTransformFlags::FlipV;
+    if (True(framebuffer_transform_flags)) {
+        UNIMPLEMENTED_MSG("Unsupported framebuffer_transform_flags={}",
+                          static_cast<u32>(framebuffer_transform_flags));
+    }
+
+    // Normalize coordinate space.
+    left /= static_cast<f32>(texture_width);
+    top /= static_cast<f32>(texture_height);
+    right /= static_cast<f32>(texture_width);
+    bottom /= static_cast<f32>(texture_height);
+
+    return Common::Rectangle<f32>(left, top, right, bottom);
+}
+
+} // namespace Tegra