ykst’s gists

ykst / Makefile

Created November 11, 2013 05:11

いつものMakefile ref: http://qiita.com/ykst@github/items/24a6e02fe281b85b96ca

	TARGET=$(shell basename $(CURDIR))
	CC=gcc
	CFLAGS= -O2 -Wall -std=gnu99
	SRCS=$(wildcard *.c)
	OBJS=$(SRCS:%.c=%.o)
	HEADERS=$(wildcard *.h)
	LDFLAGS= -lm

	all: $(TARGET)

ykst / AppDelegate.m

Created November 27, 2013 04:35

Empty Applicationで作ったプロジェクトが"Application windows are expected to have a root view controller at the end of application launch"というエラーでStoryboardを読み込まない問題の対処法 ref: http://qiita.com/ykst@github/items/9b0cbd64a23d289f4dcf

	- (BOOL)application:(UIApplication )application didFinishLaunchingWithOptions:(NSDictionary )launchOptions
	{
	/* 要らない処理
	self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
	// Override point for customization after application launch.
	self.window.backgroundColor = [UIColor whiteColor];
	[self.window makeKeyAndVisible];
	*/
	return YES;
	}

ykst / benchmarck.h

Created December 11, 2013 04:11

実行時間を計測する簡易マクロ ref: http://qiita.com/ykst@github/items/1731f82d8c9df37314eb

	static inline bool ____benchmark_check_time(char const * const comment, uint64_t const start, uint64_t const tick)
	{
	if (!tick) return true;
	uint64_t const elapsed = mach_absolute_time() - start;
	mach_timebase_info_data_t base;
	mach_timebase_info(&base);

	uint64_t const nsec = elapsed * base.numer / base.denom;
	printf("%s: %.3fms\n", comment, nsec / 1000000.0);
	return false;

ykst / file0.c

Created December 19, 2013 05:02

glFinishの代わりにglClientWaitSyncを使う ref: http://qiita.com/ykst@github/items/898a01052de2d867afa8

	void fenceSync()
	{
	// コマンドストリームにfenceを挿入する
	GLsync sync = glFenceSyncAPPLE(GL_SYNC_GPU_COMMANDS_COMPLETE_APPLE, 0);
	// fenceに到達するまで待つ
	glClientWaitSyncAPPLE(sync, GL_SYNC_FLUSH_COMMANDS_BIT_APPLE, GL_TIMEOUT_IGNORED_APPLE);
	// syncオブジェクトを解放する
	glDeleteSyncAPPLE(sync);
	}

ykst / file0.txt

Created December 22, 2013 22:06

iOSでのGLSL開発Tips ref: http://qiita.com/ykst@github/items/ce2c46611e88c0e3af6c

	cd "$INPUT_FILE_DIR" # move into file dir, otherwise xxd takes the full path for the symbol

	/usr/bin/xxd -i "$INPUT_FILE_NAME" \| sed s/}\;/,0x00}\;/ > "$DERIVED_SOURCES_DIR/$INPUT_FILE_BASE.glsl.c" # builds a c file with a hex array

ykst / Makefile

Created December 25, 2013 14:06

glsl-optimizerでGLSLのオフライン最適化を行う ref: http://qiita.com/ykst@github/items/15a438ccb35db3c3656f

	TARGET=glsl_optimizer
	CC=g++
	CFLAGS= -O2 -Wall
	SRCS=$(wildcard *.cpp)
	OBJS=$(SRCS:%.cpp=%.o)
	STATICLIBS=libglsl_optimizer.a
	HEADERS=$(wildcard *.h)
	LDFLAGS=

	all: $(TARGET)

ykst / example.js

Created March 8, 2014 14:40

createObjectURLを使ったらrevokeObjectURLを呼ぶ ref: http://qiita.com/ykst/items/a367359cd4ee96cde802

	function loadImage(array_buffer, onload) {
	var img = new Image();
	img.src = URL.createObjectURL(new Blob([array_buffer], {type:'image/jpeg'}));
	img.onload = function() {
	onload(img); // imgを即座に使い終わる関数
	URL.revokeObjectURL(img.src);
	};
	}

ykst / file2.txt

Created April 5, 2014 06:32

Parsecでアノテーション風にテキストの一部をファイルで置換する ref: http://qiita.com/ykst/items/77aa62ba539eb23bb1d6

	ghc --make gen.hs
	./gen sample.js

ykst / file1.c

Created May 19, 2014 03:34

C言語でusing的な構文 ref: http://qiita.com/ykst/items/c045104ab9c0108ba166

	using(something, 100) {
	something_show(this);
	}

ykst / file0.c

Created June 18, 2014 10:47

iOSでスピンロック ref: http://qiita.com/ykst/items/abab52d496b4ca37a82a

	#include <libkern/OSAtomic.h>

	static volatile OSSpinLock lock = OS_SPINLOCK_INIT;

	void spinlock_lock()
	{
	OSSpinLockLock(&lock);
	}

	void spinlock_unlock()

YUKISHITA Yohsuke ykst