Squashed 'deps/nostalgia/' content from commit 9cb6bd4a

git-subtree-dir: deps/nostalgia
git-subtree-split: 9cb6bd4a32e9f39a858f72443ff5c6d40489fe22

src/olympic/turbine/src/gba/gfx.cpp

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2016 - 2023 Gary Talent (gary@drinkingtea.net). All rights reserved.
+ */
+
+#include <ox/std/size.hpp>
+#include <ox/std/stringview.hpp>
+
+#include <teagba/addresses.hpp>
+#include <teagba/gfx.hpp>
+#include <teagba/irq.hpp>
+
+#include <turbine/context.hpp>
+
+namespace turbine {
+
+ox::Error initGfx(Context&) noexcept {
+	REG_DISPCTL = teagba::DispCtl_Mode0
+	            | teagba::DispCtl_SpriteMap1D
+	            | teagba::DispCtl_Obj;
+	// tell display to trigger vblank interrupts
+	REG_DISPSTAT = REG_DISPSTAT | teagba::DispStat_irq_vblank;
+	// enable vblank interrupt
+	REG_IE = REG_IE | teagba::Int_vblank;
+	return {};
+}
+
+void setWindowTitle(Context&, ox::CRStringView) noexcept {
+}
+
+int getScreenWidth(Context&) noexcept {
+	return 240;
+}
+
+int getScreenHeight(Context&) noexcept {
+	return 160;
+}
+
+ox::Size getScreenSize(Context&) noexcept {
+	return {240, 160};
+}
+
+ox::Bounds getWindowBounds(Context&) noexcept {
+	return {0, 0, 240, 160};
+}
+
+ox::Error setWindowBounds(Context&, ox::Bounds const&) noexcept {
+	return OxError(1, "setWindowBounds not supported on GBA");
+}
+
+}