Add initial Wii code

wii/Makefile

@@ -0,0 +1,138 @@
+#---------------------------------------------------------------------------------
+# Clear the implicit built in rules
+#---------------------------------------------------------------------------------
+.SUFFIXES:
+#---------------------------------------------------------------------------------
+ifeq ($(strip $(DEVKITPPC)),)
+$(error "Please set DEVKITPPC in your environment. export DEVKITPPC=<path to>devkitPPC")
+endif
+
+include $(DEVKITPPC)/wii_rules
+
+#---------------------------------------------------------------------------------
+# TARGET is the name of the output
+# BUILD is the directory where object files & intermediate files will be placed
+# SOURCES is a list of directories containing source code
+# INCLUDES is a list of directories containing extra header files
+#---------------------------------------------------------------------------------
+TARGET		:=	boot
+BUILD		:=	build
+SOURCES		:=	source
+DATA		:=	data
+INCLUDES	:=
+
+#---------------------------------------------------------------------------------
+# options for code generation
+#---------------------------------------------------------------------------------
+
+CFLAGS	= -g -O2 -Wall $(MACHDEP) $(INCLUDE)
+CXXFLAGS	=	$(CFLAGS)
+
+LDFLAGS	=	-g $(MACHDEP) -Wl,-Map,$(notdir $@).map
+
+#---------------------------------------------------------------------------------
+# any extra libraries we wish to link with the project
+#---------------------------------------------------------------------------------
+LIBS	:=	-lwiiuse -lbte -logc -lm
+
+#---------------------------------------------------------------------------------
+# list of directories containing libraries, this must be the top level containing
+# include and lib
+#---------------------------------------------------------------------------------
+LIBDIRS	:=
+
+#---------------------------------------------------------------------------------
+# no real need to edit anything past this point unless you need to add additional
+# rules for different file extensions
+#---------------------------------------------------------------------------------
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+#---------------------------------------------------------------------------------
+
+export OUTPUT	:=	$(CURDIR)/$(TARGET)
+
+export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
+					$(foreach dir,$(DATA),$(CURDIR)/$(dir))
+
+export DEPSDIR	:=	$(CURDIR)/$(BUILD)
+
+#---------------------------------------------------------------------------------
+# automatically build a list of object files for our project
+#---------------------------------------------------------------------------------
+CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
+CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
+sFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
+SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.S)))
+BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
+
+#---------------------------------------------------------------------------------
+# use CXX for linking C++ projects, CC for standard C
+#---------------------------------------------------------------------------------
+ifeq ($(strip $(CPPFILES)),)
+	export LD	:=	$(CC)
+else
+	export LD	:=	$(CXX)
+endif
+
+export OFILES_BIN	:=	$(addsuffix .o,$(BINFILES))
+export OFILES_SOURCES := $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(sFILES:.s=.o) $(SFILES:.S=.o)
+export OFILES := $(OFILES_BIN) $(OFILES_SOURCES)
+
+export HFILES := $(addsuffix .h,$(subst .,_,$(BINFILES)))
+
+#---------------------------------------------------------------------------------
+# build a list of include paths
+#---------------------------------------------------------------------------------
+export INCLUDE	:=	$(foreach dir,$(INCLUDES), -iquote $(CURDIR)/$(dir)) \
+					$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
+					-I$(CURDIR)/$(BUILD) \
+					-I$(LIBOGC_INC)
+
+#---------------------------------------------------------------------------------
+# build a list of library paths
+#---------------------------------------------------------------------------------
+export LIBPATHS	:= -L$(LIBOGC_LIB) $(foreach dir,$(LIBDIRS),-L$(dir)/lib)
+
+export OUTPUT	:=	$(CURDIR)/$(TARGET)
+.PHONY: $(BUILD) clean
+
+#---------------------------------------------------------------------------------
+$(BUILD):
+	@[ -d $@ ] || mkdir -p $@
+	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
+
+#---------------------------------------------------------------------------------
+clean:
+	@echo clean ...
+	@rm -fr $(BUILD) $(OUTPUT).elf $(OUTPUT).dol
+
+#---------------------------------------------------------------------------------
+run:
+	wiiload $(TARGET).dol
+
+
+#---------------------------------------------------------------------------------
+else
+
+DEPENDS	:=	$(OFILES:.o=.d)
+
+#---------------------------------------------------------------------------------
+# main targets
+#---------------------------------------------------------------------------------
+$(OUTPUT).dol: $(OUTPUT).elf
+$(OUTPUT).elf: $(OFILES)
+
+$(OFILES_SOURCES) : $(HFILES)
+
+#---------------------------------------------------------------------------------
+# This rule links in binary data with the .jpg extension
+#---------------------------------------------------------------------------------
+%.jpg.o	%_jpg.h :	%.jpg
+#---------------------------------------------------------------------------------
+	@echo $(notdir $<)
+	$(bin2o)
+
+-include $(DEPENDS)
+
+#---------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------

wii/meta.xml

@@ -0,0 +1,39 @@
+<!--
+ For more information, see:
+   <https://wiibrew.org/wiki/Homebrew_Channel#Configuring_Applications>.
+
+ The icon.png should be a PNG with 128x48 dimensions. See:
+   <https://wiibrew.org/wiki/Homebrew_Channel#Adding_an_Icon>.
+   <https://wiibrew.org/wiki/Homebrew_Channel_icons>.
+-->
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<app version="1">
+    <!-- The name of the application -->
+    <name>wii-pong</name>
+
+    <!-- The name of the person or group that wrote the code for the program. -->
+    <coder>alex</coder>
+
+    <!-- The version of the application. -->
+    <version></version>
+
+    <!--
+     The data the application was released. It has to be a timestamp using
+     this format: YYYYmmddHHMMSS
+    -->
+    <release_date></release_date>
+
+    <!--
+     This is displayed on the main menu of the Homebrew Channel (before you
+     select an application) and is used as a space to add a few words to
+     describe the program.
+    -->
+    <short_description></short_description>
+
+    <!--
+     This is displayed once the application is chosen. It describes the program
+     and its function in great detail, and can be used to elaborate on a
+     program's controls.
+    -->
+    <long_description></long_description>
+</app>

wii/source/main.cpp

@@ -0,0 +1,37 @@
+#include <cstdint>
+#include <cstdlib>
+
+#include <gccore.h>
+#include <wiiuse/wpad.h>
+
+#include "screen.h"
+
+
+int main(int argc, char **argv)
+{
+	auto screen = Screen{};
+
+	WPAD_Init();
+
+	Paddle my_paddle{ screen.height(), 15, 5 };
+
+	auto exit = false;
+	while (!exit)
+	{
+		// Call WPAD_ScanPads each loop, this reads the latest controller states
+		WPAD_ScanPads();
+		const auto pressed = WPAD_ButtonsDown(0);
+		if (pressed & WPAD_BUTTON_HOME)
+			exit = true;
+
+		// Clear the frame buffer.
+		screen.clear();
+
+		// drawing goes here
+
+		// Wait for the next frame
+		screen.wait_for_vsync();
+	}
+
+	return 0;
+}

wii/source/screen.cpp

@@ -0,0 +1,58 @@
+#include "screen.h"
+
+#include <gccore.h>
+
+Screen::Screen()
+{
+    // Initialise the video system
+    VIDEO_Init();
+
+    // Obtain the preferred video mode from the system
+	// This will correspond to the settings in the Wii menu
+    _rmode = VIDEO_GetPreferredMode(NULL);
+
+    // Allocate memory for the display in the uncached region
+    _xfb = MEM_K0_TO_K1(SYS_AllocateFramebuffer(_rmode));
+
+    // Set up the video registers with the chosen mode
+	VIDEO_Configure(_rmode);
+
+	// Tell the video hardware where our display memory is
+	VIDEO_SetNextFramebuffer(_xfb);
+
+	// Make the display visible
+	VIDEO_SetBlack(FALSE);
+
+	// Flush the video register changes to the hardware
+	VIDEO_Flush();
+
+	// Wait for Video setup to complete
+	VIDEO_WaitVSync();
+	if (_rmode->viTVMode & VI_NON_INTERLACE)
+		VIDEO_WaitVSync();
+}
+
+void Screen::clear() noexcept
+{
+	VIDEO_ClearFrameBuffer(_rmode, _xfb, COLOR_BLACK);
+}
+
+void Screen::draw(int x, int y, uint16_t colour) noexcept
+{
+	reinterpret_cast<uint16_t*>(_xfb)[(y * _rmode->fbWidth) + x] = colour;
+}
+
+void Screen::wait_for_vsync() const noexcept
+{
+	VIDEO_WaitVSync();
+}
+
+int Screen::width() const noexcept
+{
+	return _rmode->fbWidth;
+}
+
+int Screen::height() const noexcept
+{
+	return _rmode->xfbHeight;
+}

wii/source/screen.h

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+#pragma once
+
+#include <cstdint>
+
+#include <gccore.h>
+
+
+/// Class for drawing to the screen, simple abstraction around the raw
+/// framebuffer.
+class Screen final
+{
+public:
+    /// Constructor.
+    ///
+    /// \remarks Automatically selects the display settings.
+    Screen();
+
+    /// Clear the screen.
+    void clear() noexcept;
+
+    /// Draw a pixel to the screen.
+    ///
+    /// \param x The x-coordinate to draw to.
+    /// \param y The y-coordinate to draw to.
+    /// \param colour The colour value to draw to the coordinate.
+    void draw(int x, int y, uint16_t colour) noexcept;
+
+    /// Wait for a v-sync.
+    void wait_for_vsync() const noexcept;
+
+    /// \return The width of the screen in pixels.
+    int width() const noexcept;
+
+    /// \return The height of the screen in pixels.
+    int height() const noexcept;
+
+private:
+    /// The allocated framebuffer.
+    void* _xfb;
+
+    /// The rendermode object.
+    GXRModeObj* _rmode;
+};