Added LCD registers, and implementation for color filling in OGL code.

1 files changed, 88 insertions, 0 deletions

diff --git a/src/core/hw/lcd.h b/src/core/hw/lcd.h
new file mode 100644
index 00000000..43893a62
--- /dev/null
+++ b/src/core/hw/lcd.h
@@ -0,0 +1,88 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <cstddef>
+
+#include "common/common_types.h"
+#include "common/bit_field.h"
+
+#define LCD_REG_INDEX(field_name) (offsetof(LCD::Regs, field_name) / sizeof(u32))
+
+namespace LCD {
+
+struct Regs {
+
+    union ColorFill {
+        u32 raw;
+
+        BitField<0, 8, u32> color_r;
+        BitField<8, 8, u32> color_g;
+        BitField<16, 8, u32> color_b;
+        BitField<24, 1, u32> is_enabled;
+    };
+
+    INSERT_PADDING_WORDS(0x81);
+    ColorFill color_fill_top;
+    INSERT_PADDING_WORDS(0xE);
+    u32 backlight_top;
+
+    INSERT_PADDING_WORDS(0x1F0);
+
+    ColorFill color_fill_bottom;
+    INSERT_PADDING_WORDS(0xE);
+    u32 backlight_bottom;
+    INSERT_PADDING_WORDS(0x16F);
+
+    static inline size_t NumIds() {
+        return sizeof(Regs) / sizeof(u32);
+    }
+
+    u32& operator [] (int index) const {
+        u32* content = (u32*)this;
+        return content[index];
+    }
+
+    u32& operator [] (int index) {
+        u32* content = (u32*)this;
+        return content[index];
+    }
+
+#undef ASSERT_MEMBER_SIZE
+
+};
+static_assert(std::is_standard_layout<Regs>::value, "Structure does not use standard layout");
+
+// TODO: MSVC does not support using offsetof() on non-static data members even though this
+//       is technically allowed since C++11. This macro should be enabled once MSVC adds
+//       support for that.
+#ifndef _MSC_VER
+#define ASSERT_REG_POSITION(field_name, position) \
+    static_assert(offsetof(Regs, field_name) == position * 4, \
+              "Field "#field_name" has invalid position")
+
+ASSERT_REG_POSITION(color_fill_top,    0x81);
+ASSERT_REG_POSITION(backlight_top,     0x90);
+ASSERT_REG_POSITION(color_fill_bottom, 0x281);
+ASSERT_REG_POSITION(backlight_bottom,  0x290);
+
+#undef ASSERT_REG_POSITION
+#endif // !defined(_MSC_VER)
+
+extern Regs g_regs;
+
+template <typename T>
+void Read(T &var, const u32 addr);
+
+template <typename T>
+void Write(u32 addr, const T data);
+
+/// Initialize hardware
+void Init();
+
+/// Shutdown hardware
+void Shutdown();
+    
+} // namespace