GPU: Implement guest driver profile and deduce texture handler sizes.

1 files changed, 34 insertions, 0 deletions

diff --git a/src/video_core/guest_driver.cpp b/src/video_core/guest_driver.cpp
new file mode 100644
index 000000000..b1ac254ff
--- /dev/null
+++ b/src/video_core/guest_driver.cpp
@@ -0,0 +1,34 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "video_core/guest_driver.h"
+
+namespace VideoCore {
+
+void GuestDriverProfile::DeduceTextureHandlerSize(std::vector<u32>&& bound_offsets) {
+    if (texture_handler_size_deduced) {
+        return;
+    }
+    std::size_t size = bound_offsets.size();
+    if (size < 2) {
+        return;
+    }
+    std::sort(bound_offsets.begin(), bound_offsets.end(),
+              [](const u32& a, const u32& b) { return a < b; });
+    u32 min_val = 0xFFFFFFFF; // set to highest possible 32 bit integer;
+    for (std::size_t i = 1; i < size; i++) {
+        if (bound_offsets[i] == bound_offsets[i - 1]) {
+            continue;
+        }
+        const u32 new_min = bound_offsets[i] - bound_offsets[i - 1];
+        min_val = std::min(min_val, new_min);
+    }
+    if (min_val > 2) {
+        return;
+    }
+    texture_handler_size_deduced = true;
+    texture_handler_size = sizeof(u32) * min_val;
+}
+
+} // namespace VideoCore