strife

package module
v0.2.2 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jan 10, 2021 License: MIT Imports: 8 Imported by: 14

README

strife Build Status

A simple game framework that wraps around SDL2.

example

The largest example use of the Strife framework is the Phi text editor, a text editor written entirely from scratch with syntax highlighting, a command palette, multiple buffer support, etc.

Though there are some smaller examples demonstrating components of the Strife API in the examples/ folder.

note/disclaimer

This is a work in progress. It provides a very minimal toolset for rendering shapes, images, and text as well as capturing user input. This is not at a production level and is mostly being worked on when the needs of my other projects (that depend on this) evolve.

There is no documentation either! If you want to use it you will have to check out the examples. I may get round to writing some documentation but the API is very volatile at the moment.

installing

Simple as

$ go get github.com/felixangell/strife

Make sure you have SDL2 installed as well as the ttf and img addons:

$ brew install SDL2 SDL2_ttf SDL2_img

getting started

This is a commented code snippet to help you get started:

func main() {
	// create a nice shiny window
	window := strife.SetupRenderWindow(1280, 720, strife.DefaultConfig())
	window.SetTitle("Hello world!")
	window.SetResizable(true)
	window.Create()

	// this is our event handler
	window.HandleEvents(func(evt strife.StrifeEvent) {
		switch event := evt.(type) {
		case *strife.CloseEvent:
			println("closing window!")
			window.Close()
		case *strife.WindowResizeEvent:
			println("resize to ", event.Width, "x", event.Height)
		}
	})

	// game loop
	for {
		// handle the events before we do any
		// rendering etc.
		window.PollEvents()

		// if we have a window close event
		// from the previous poll, break out of
		// our game loop
		if window.CloseRequested() {
			break
		}

		// rendering context stuff here
		// clear and display is typical
		// all your rendering code should
		// go...
		ctx := window.GetRenderContext()
		ctx.Clear()
		{
			// ...in this section here
			ctx.SetColor(strife.Red)
			ctx.Rect(10, 10, 50, 50, strife.Fill)

			// check out some other examples!
		}
		ctx.Display()
	}
}

license

MIT

Documentation

Index

Constants

View Source 
const (
	// mapping to sdl.K_UNKNOWN
	UNKNOWN = sdl.K_UNKNOWN // "" (no name, empty string)

	KEY_RETURN     = sdl.K_RETURN     // "Return" (the Enter key (main keyboard))
	KEY_ESCAPE     = sdl.K_ESCAPE     // "Escape" (the Esc key)
	KEY_BACKSPACE  = sdl.K_BACKSPACE  // "Backspace"
	KEY_TAB        = sdl.K_TAB        // "Tab" (the Tab key)
	KEY_SPACE      = sdl.K_SPACE      // "Space" (the Space Bar key(s))
	KEY_EXCLAIM    = sdl.K_EXCLAIM    // "!"
	KEY_QUOTEDBL   = sdl.K_QUOTEDBL   // """
	KEY_HASH       = sdl.K_HASH       // "#"
	KEY_PERCENT    = sdl.K_PERCENT    // "%"
	KEY_DOLLAR     = sdl.K_DOLLAR     // "$"
	KEY_AMPERSAND  = sdl.K_AMPERSAND  // "&"
	KEY_QUOTE      = sdl.K_QUOTE      // "'"
	KEY_LEFTPAREN  = sdl.K_LEFTPAREN  // "("
	KEY_RIGHTPAREN = sdl.K_RIGHTPAREN // ")"
	KEY_ASTERISK   = sdl.K_ASTERISK   // "*"
	KEY_PLUS       = sdl.K_PLUS       // "+"
	KEY_COMMA      = sdl.K_COMMA      // ","
	KEY_MINUS      = sdl.K_MINUS      // "-"
	KEY_PERIOD     = sdl.K_PERIOD     // "."
	KEY_SLASH      = sdl.K_SLASH      // "/"
	KEY_0          = sdl.K_0          // "0"
	KEY_1          = sdl.K_1          // "1"
	KEY_2          = sdl.K_2          // "2"
	KEY_3          = sdl.K_3          // "3"
	KEY_4          = sdl.K_4          // "4"
	KEY_5          = sdl.K_5          // "5"
	KEY_6          = sdl.K_6          // "6"
	KEY_7          = sdl.K_7          // "7"
	KEY_8          = sdl.K_8          // "8"
	KEY_9          = sdl.K_9          // "9"
	KEY_COLON      = sdl.K_COLON      // ":"
	KEY_SEMICOLON  = sdl.K_SEMICOLON  // ";"
	KEY_LESS       = sdl.K_LESS       // "<"
	KEY_EQUALS     = sdl.K_EQUALS     // "="
	KEY_GREATER    = sdl.K_GREATER    // ">"
	KEY_QUESTION   = sdl.K_QUESTION   // "?"
	KEY_AT         = sdl.K_AT         // "@"

	KEY_LEFTBRACKET  = sdl.K_LEFTBRACKET  // "["
	KEY_BACKSLASH    = sdl.K_BACKSLASH    // "\"
	KEY_RIGHTBRACKET = sdl.K_RIGHTBRACKET // "]"
	KEY_CARET        = sdl.K_CARET        // "^"
	KEY_UNDERSCORE   = sdl.K_UNDERSCORE   // "_"
	KEY_BACKQUOTE    = sdl.K_BACKQUOTE    // "`"
	KEY_A            = sdl.K_a            // "A"
	KEY_B            = sdl.K_b            // "B"
	KEY_C            = sdl.K_c            // "C"
	KEY_D            = sdl.K_d            // "D"
	KEY_E            = sdl.K_e            // "E"
	KEY_F            = sdl.K_f            // "F"
	KEY_G            = sdl.K_g            // "G"
	KEY_H            = sdl.K_h            // "H"
	KEY_I            = sdl.K_i            // "I"
	KEY_J            = sdl.K_j            // "J"
	KEY_K            = sdl.K_k            // "K"
	KEY_L            = sdl.K_l            // "L"
	KEY_M            = sdl.K_m            // "M"
	KEY_N            = sdl.K_n            // "N"
	KEY_O            = sdl.K_o            // "O"
	KEY_P            = sdl.K_p            // "P"
	KEY_Q            = sdl.K_q            // "Q"
	KEY_R            = sdl.K_r            // "R"
	KEY_S            = sdl.K_s            // "S"
	KEY_T            = sdl.K_t            // "T"
	KEY_U            = sdl.K_u            // "U"
	KEY_V            = sdl.K_v            // "V"
	KEY_W            = sdl.K_w            // "W"
	KEY_X            = sdl.K_x            // "X"
	KEY_Y            = sdl.K_y            // "Y"
	KEY_Z            = sdl.K_z            // "Z"

	KEY_CAPSLOCK = sdl.K_CAPSLOCK // "CapsLock"

	KEY_F1  = sdl.K_F1  // "F1"
	KEY_F2  = sdl.K_F2  // "F2"
	KEY_F3  = sdl.K_F3  // "F3"
	KEY_F4  = sdl.K_F4  // "F4"
	KEY_F5  = sdl.K_F5  // "F5"
	KEY_F6  = sdl.K_F6  // "F6"
	KEY_F7  = sdl.K_F7  // "F7"
	KEY_F8  = sdl.K_F8  // "F8"
	KEY_F9  = sdl.K_F9  // "F9"
	KEY_F10 = sdl.K_F10 // "F10"
	KEY_F11 = sdl.K_F11 // "F11"
	KEY_F12 = sdl.K_F12 // "F12"

	KEY_PRINTSCREEN = sdl.K_PRINTSCREEN // "PrintScreen"
	KEY_SCROLLLOCK  = sdl.K_SCROLLLOCK  // "ScrollLock"
	KEY_PAUSE       = sdl.K_PAUSE       // "Pause" (the Pause / Break key)
	KEY_INSERT      = sdl.K_INSERT      // "Insert" (insert on PC, help on some Mac keyboards (but does send code 73, not 117))
	KEY_HOME        = sdl.K_HOME        // "Home"
	KEY_PAGEUP      = sdl.K_PAGEUP      // "PageUp"
	KEY_DELETE      = sdl.K_DELETE      // "Delete"
	KEY_END         = sdl.K_END         // "End"
	KEY_PAGEDOWN    = sdl.K_PAGEDOWN    // "PageDown"
	KEY_RIGHT       = sdl.K_RIGHT       // "Right" (the Right arrow key (navigation keypad))
	KEY_LEFT        = sdl.K_LEFT        // "Left" (the Left arrow key (navigation keypad))
	KEY_DOWN        = sdl.K_DOWN        // "Down" (the Down arrow key (navigation keypad))
	KEY_UP          = sdl.K_UP          // "Up" (the Up arrow key (navigation keypad))

	KEY_NUMLOCKCLEAR = sdl.K_NUMLOCKCLEAR // "Numlock" (the Num Lock key (PC) / the Clear key (Mac))
	KEY_KP_DIVIDE    = sdl.K_KP_DIVIDE    // "Keypad /" (the / key (numeric keypad))
	KEY_KP_MULTIPLY  = sdl.K_KP_MULTIPLY  // "Keypad *" (the * key (numeric keypad))
	KEY_KP_MINUS     = sdl.K_KP_MINUS     // "Keypad -" (the - key (numeric keypad))
	KEY_KP_PLUS      = sdl.K_KP_PLUS      // "Keypad +" (the + key (numeric keypad))
	KEY_KP_ENTER     = sdl.K_KP_ENTER     // "Keypad Enter" (the Enter key (numeric keypad))
	KEY_KP_1         = sdl.K_KP_1         // "Keypad 1" (the 1 key (numeric keypad))
	KEY_KP_2         = sdl.K_KP_2         // "Keypad 2" (the 2 key (numeric keypad))
	KEY_KP_3         = sdl.K_KP_3         // "Keypad 3" (the 3 key (numeric keypad))
	KEY_KP_4         = sdl.K_KP_4         // "Keypad 4" (the 4 key (numeric keypad))
	KEY_KP_5         = sdl.K_KP_5         // "Keypad 5" (the 5 key (numeric keypad))
	KEY_KP_6         = sdl.K_KP_6         // "Keypad 6" (the 6 key (numeric keypad))
	KEY_KP_7         = sdl.K_KP_7         // "Keypad 7" (the 7 key (numeric keypad))
	KEY_KP_8         = sdl.K_KP_8         // "Keypad 8" (the 8 key (numeric keypad))
	KEY_KP_9         = sdl.K_KP_9         // "Keypad 9" (the 9 key (numeric keypad))
	KEY_KP_0         = sdl.K_KP_0         // "Keypad 0" (the 0 key (numeric keypad))
	KEY_KP_PERIOD    = sdl.K_KP_PERIOD    // "Keypad ." (the . key (numeric keypad))

	KEY_APPLICATION    = sdl.K_APPLICATION    // "Application" (the Application / Compose / Context Menu (Windows) key)
	KEY_POWER          = sdl.K_POWER          // "Power" (The USB document says this is a status flag, not a physical key - but some Mac keyboards do have a power key.)
	KEY_KP_EQUALS      = sdl.K_KP_EQUALS      // "Keypad =" (the = key (numeric keypad))
	KEY_F13            = sdl.K_F13            // "F13"
	KEY_F14            = sdl.K_F14            // "F14"
	KEY_F15            = sdl.K_F15            // "F15"
	KEY_F16            = sdl.K_F16            // "F16"
	KEY_F17            = sdl.K_F17            // "F17"
	KEY_F18            = sdl.K_F18            // "F18"
	KEY_F19            = sdl.K_F19            // "F19"
	KEY_F20            = sdl.K_F20            // "F20"
	KEY_F21            = sdl.K_F21            // "F21"
	KEY_F22            = sdl.K_F22            // "F22"
	KEY_F23            = sdl.K_F23            // "F23"
	KEY_F24            = sdl.K_F24            // "F24"
	KEY_EXECUTE        = sdl.K_EXECUTE        // "Execute"
	KEY_HELP           = sdl.K_HELP           // "Help"
	KEY_MENU           = sdl.K_MENU           // "Menu"
	KEY_SELECT         = sdl.K_SELECT         // "Select"
	KEY_STOP           = sdl.K_STOP           // "Stop"
	KEY_AGAIN          = sdl.K_AGAIN          // "Again" (the Again key (Redo))
	KEY_UNDO           = sdl.K_UNDO           // "Undo"
	KEY_CUT            = sdl.K_CUT            // "Cut"
	KEY_COPY           = sdl.K_COPY           // "Copy"
	KEY_PASTE          = sdl.K_PASTE          // "Paste"
	KEY_FIND           = sdl.K_FIND           // "Find"
	KEY_MUTE           = sdl.K_MUTE           // "Mute"
	KEY_VOLUMEUP       = sdl.K_VOLUMEUP       // "VolumeUp"
	KEY_VOLUMEDOWN     = sdl.K_VOLUMEDOWN     // "VolumeDown"
	KEY_KP_COMMA       = sdl.K_KP_COMMA       // "Keypad ," (the Comma key (numeric keypad))
	KEY_KP_EQUALSAS400 = sdl.K_KP_EQUALSAS400 // "Keypad = (AS400)" (the Equals AS400 key (numeric keypad))

	KEY_ALTERASE   = sdl.K_ALTERASE   // "AltErase" (Erase-Eaze)
	KEY_SYSREQ     = sdl.K_SYSREQ     // "SysReq" (the SysReq key)
	KEY_CANCEL     = sdl.K_CANCEL     // "Cancel"
	KEY_CLEAR      = sdl.K_CLEAR      // "Clear"
	KEY_PRIOR      = sdl.K_PRIOR      // "Prior"
	KEY_RETURN2    = sdl.K_RETURN2    // "Return"
	KEY_SEPARATOR  = sdl.K_SEPARATOR  // "Separator"
	KEY_OUT        = sdl.K_OUT        // "Out"
	KEY_OPER       = sdl.K_OPER       // "Oper"
	KEY_CLEARAGAIN = sdl.K_CLEARAGAIN // "Clear / Again"
	KEY_CRSEL      = sdl.K_CRSEL      // "CrSel"
	KEY_EXSEL      = sdl.K_EXSEL      // "ExSel"

	KEY_KP_00              = sdl.K_KP_00              // "Keypad 00" (the 00 key (numeric keypad))
	KEY_KP_000             = sdl.K_KP_000             // "Keypad 000" (the 000 key (numeric keypad))
	KEY_THOUSANDSSEPARATOR = sdl.K_THOUSANDSSEPARATOR // "ThousandsSeparator" (the Thousands Separator key)
	KEY_DECIMALSEPARATOR   = sdl.K_DECIMALSEPARATOR   // "DecimalSeparator" (the Decimal Separator key)
	KEY_CURRENCYUNIT       = sdl.K_CURRENCYUNIT       // "CurrencyUnit" (the Currency Unit key)
	KEY_CURRENCYSUBUNIT    = sdl.K_CURRENCYSUBUNIT    // "CurrencySubUnit" (the Currency Subunit key)
	KEY_KP_LEFTPAREN       = sdl.K_KP_LEFTPAREN       // "Keypad (" (the Left Parenthesis key (numeric keypad))
	KEY_KP_RIGHTPAREN      = sdl.K_KP_RIGHTPAREN      // "Keypad )" (the Right Parenthesis key (numeric keypad))
	KEY_KP_LEFTBRACE       = sdl.K_KP_LEFTBRACE       // "Keypad {" (the Left Brace key (numeric keypad))
	KEY_KP_RIGHTBRACE      = sdl.K_KP_RIGHTBRACE      // "Keypad }" (the Right Brace key (numeric keypad))
	KEY_KP_TAB             = sdl.K_KP_TAB             // "Keypad Tab" (the Tab key (numeric keypad))
	KEY_KP_BACKSPACE       = sdl.K_KP_BACKSPACE       // "Keypad Backspace" (the Backspace key (numeric keypad))
	KEY_KP_A               = sdl.K_KP_A               // "Keypad A" (the A key (numeric keypad))
	KEY_KP_B               = sdl.K_KP_B               // "Keypad B" (the B key (numeric keypad))
	KEY_KP_C               = sdl.K_KP_C               // "Keypad C" (the C key (numeric keypad))
	KEY_KP_D               = sdl.K_KP_D               // "Keypad D" (the D key (numeric keypad))
	KEY_KP_E               = sdl.K_KP_E               // "Keypad E" (the E key (numeric keypad))
	KEY_KP_F               = sdl.K_KP_F               // "Keypad F" (the F key (numeric keypad))
	KEY_KP_XOR             = sdl.K_KP_XOR             // "Keypad XOR" (the XOR key (numeric keypad))
	KEY_KP_POWER           = sdl.K_KP_POWER           // "Keypad ^" (the Power key (numeric keypad))
	KEY_KP_PERCENT         = sdl.K_KP_PERCENT         // "Keypad %" (the Percent key (numeric keypad))
	KEY_KP_LESS            = sdl.K_KP_LESS            // "Keypad <" (the Less key (numeric keypad))
	KEY_KP_GREATER         = sdl.K_KP_GREATER         // "Keypad >" (the Greater key (numeric keypad))
	KEY_KP_AMPERSAND       = sdl.K_KP_AMPERSAND       // "Keypad &" (the & key (numeric keypad))
	KEY_KP_DBLAMPERSAND    = sdl.K_KP_DBLAMPERSAND    // "Keypad &&" (the && key (numeric keypad))
	KEY_KP_VERTICALBAR     = sdl.K_KP_VERTICALBAR     // "Keypad |" (the | key (numeric keypad))
	KEY_KP_DBLVERTICALBAR  = sdl.K_KP_DBLVERTICALBAR  // "Keypad ||" (the || key (numeric keypad))
	KEY_KP_COLON           = sdl.K_KP_COLON           // "Keypad :" (the : key (numeric keypad))
	KEY_KP_HASH            = sdl.K_KP_HASH            // "Keypad #" (the # key (numeric keypad))
	KEY_KP_SPACE           = sdl.K_KP_SPACE           // "Keypad Space" (the Space key (numeric keypad))
	KEY_KP_AT              = sdl.K_KP_AT              // "Keypad @" (the @ key (numeric keypad))
	KEY_KP_EXCLAM          = sdl.K_KP_EXCLAM          // "Keypad !" (the ! key (numeric keypad))
	KEY_KP_MEMSTORE        = sdl.K_KP_MEMSTORE        // "Keypad MemStore" (the Mem Store key (numeric keypad))
	KEY_KP_MEMRECALL       = sdl.K_KP_MEMRECALL       // "Keypad MemRecall" (the Mem Recall key (numeric keypad))
	KEY_KP_MEMCLEAR        = sdl.K_KP_MEMCLEAR        // "Keypad MemClear" (the Mem Clear key (numeric keypad))
	KEY_KP_MEMADD          = sdl.K_KP_MEMADD          // "Keypad MemAdd" (the Mem Add key (numeric keypad))
	KEY_KP_MEMSUBTRACT     = sdl.K_KP_MEMSUBTRACT     // "Keypad MemSubtract" (the Mem Subtract key (numeric keypad))
	KEY_KP_MEMMULTIPLY     = sdl.K_KP_MEMMULTIPLY     // "Keypad MemMultiply" (the Mem Multiply key (numeric keypad))
	KEY_KP_MEMDIVIDE       = sdl.K_KP_MEMDIVIDE       // "Keypad MemDivide" (the Mem Divide key (numeric keypad))
	KEY_KP_PLUSMINUS       = sdl.K_KP_PLUSMINUS       // "Keypad +/-" (the +/- key (numeric keypad))
	KEY_KP_CLEAR           = sdl.K_KP_CLEAR           // "Keypad Clear" (the Clear key (numeric keypad))
	KEY_KP_CLEARENTRY      = sdl.K_KP_CLEARENTRY      // "Keypad ClearEntry" (the Clear Entry key (numeric keypad))
	KEY_KP_BINARY          = sdl.K_KP_BINARY          // "Keypad Binary" (the Binary key (numeric keypad))
	KEY_KP_OCTAL           = sdl.K_KP_OCTAL           // "Keypad Octal" (the Octal key (numeric keypad))
	KEY_KP_DECIMAL         = sdl.K_KP_DECIMAL         // "Keypad Decimal" (the Decimal key (numeric keypad))
	KEY_KP_HEXADECIMAL     = sdl.K_KP_HEXADECIMAL     // "Keypad Hexadecimal" (the Hexadecimal key (numeric keypad))

	KEY_LCTRL  = sdl.K_LCTRL  // "Left Ctrl"
	KEY_LSHIFT = sdl.K_LSHIFT // "Left Shift"
	KEY_LALT   = sdl.K_LALT   // "Left Alt" (alt, option)
	KEY_LGUI   = sdl.K_LGUI   // "Left GUI" (windows, command (apple), meta)
	KEY_RCTRL  = sdl.K_RCTRL  // "Right Ctrl"
	KEY_RSHIFT = sdl.K_RSHIFT // "Right Shift"
	KEY_RALT   = sdl.K_RALT   // "Right Alt" (alt, option)
	KEY_RGUI   = sdl.K_RGUI   // "Right GUI" (windows, command (apple), meta)

	KEY_MODE = sdl.K_MODE // "ModeSwitch" (I'm not sure if this is really not covered by any of the above, but since there's a special KMOD_MODE for it I'm adding it here)

	KEY_AUDIONEXT    = sdl.K_AUDIONEXT    // "AudioNext" (the Next Track media key)
	KEY_AUDIOPREV    = sdl.K_AUDIOPREV    // "AudioPrev" (the Previous Track media key)
	KEY_AUDIOSTOP    = sdl.K_AUDIOSTOP    // "AudioStop" (the Stop media key)
	KEY_AUDIOPLAY    = sdl.K_AUDIOPLAY    // "AudioPlay" (the Play media key)
	KEY_AUDIOMUTE    = sdl.K_AUDIOMUTE    // "AudioMute" (the Mute volume key)
	KEY_MEDIASELECT  = sdl.K_MEDIASELECT  // "MediaSelect" (the Media Select key)
	KEY_WWW          = sdl.K_WWW          // "WWW" (the WWW/World Wide Web key)
	KEY_MAIL         = sdl.K_MAIL         // "Mail" (the Mail/eMail key)
	KEY_CALCULATOR   = sdl.K_CALCULATOR   // "Calculator" (the Calculator key)
	KEY_COMPUTER     = sdl.K_COMPUTER     // "Computer" (the My Computer key)
	KEY_AC_SEARCH    = sdl.K_AC_SEARCH    // "AC Search" (the Search key (application control keypad))
	KEY_AC_HOME      = sdl.K_AC_HOME      // "AC Home" (the Home key (application control keypad))
	KEY_AC_BACK      = sdl.K_AC_BACK      // "AC Back" (the Back key (application control keypad))
	KEY_AC_FORWARD   = sdl.K_AC_FORWARD   // "AC Forward" (the Forward key (application control keypad))
	KEY_AC_STOP      = sdl.K_AC_STOP      // "AC Stop" (the Stop key (application control keypad))
	KEY_AC_REFRESH   = sdl.K_AC_REFRESH   // "AC Refresh" (the Refresh key (application control keypad))
	KEY_AC_BOOKMARKS = sdl.K_AC_BOOKMARKS // "AC Bookmarks" (the Bookmarks key (application control keypad))

	KEY_BRIGHTNESSDOWN = sdl.K_BRIGHTNESSDOWN // "BrightnessDown" (the Brightness Down key)
	KEY_BRIGHTNESSUP   = sdl.K_BRIGHTNESSUP   // "BrightnessUp" (the Brightness Up key)
	KEY_DISPLAYSWITCH  = sdl.K_DISPLAYSWITCH  // "DisplaySwitch" (display mirroring/dual display switch, video mode switch)
	KEY_KBDILLUMTOGGLE = sdl.K_KBDILLUMTOGGLE // "KBDIllumToggle" (the Keyboard Illumination Toggle key)
	KEY_KBDILLUMDOWN   = sdl.K_KBDILLUMDOWN   // "KBDIllumDown" (the Keyboard Illumination Down key)
	KEY_KBDILLUMUP     = sdl.K_KBDILLUMUP     // "KBDIllumUp" (the Keyboard Illumination Up key)
	KEY_EJECT          = sdl.K_EJECT          // "Eject" (the Eject key)
	KEY_SLEEP          = sdl.K_SLEEP          // "Sleep" (the Sleep key)
)

A mapping of _all_ the SDL keys.

Variables

View Source 
var (
	White = RGB(255, 255, 255)
	Red   = RGB(255, 0, 0)
	Green = RGB(0, 255, 0)
	Blue  = RGB(0, 0, 255)
	Black = RGB(0, 0, 0)
)

List of preset colours

Functions

func CurrentTimeMillis 

func CurrentTimeMillis() int64

CurrentTimeMillis wraps over SDL_GetTicks. Use time.Now() instead.

func EnableDPI 

func EnableDPI()

EnableDPI will setup DPI for windows ... currently unimplemented!

func GetDisplayDPI 

func GetDisplayDPI(displayIndex int) (dpi float32, def float32)

GetDisplayDPI returns the dpi and default dpi of the given display

func HandleEvent 

func HandleEvent(event StrifeEvent)

HandleEvent will trigger the given StrifeEvent

func KeyPressed 

func KeyPressed(keyCode int) bool

KeyPressed will query if a key is pressed in the KeyboardHandler

func KeyState 

func KeyState() []uint8

KeyState wraps over SDL GetKeyboardState

func MouseCoords 

func MouseCoords() (int, int)

MouseCoords returns the coords of the mouse

func PollKeys 

func PollKeys() bool

PollKeys returns if there are in key presses in the buffer

func PopKey 

func PopKey() int

PopKey pops a key from the key press queue.

Types

type BaseEvent 

type BaseEvent struct{}

BaseEvent is a simple helper structure for events to satisfy sdl2

func (*BaseEvent) GetTimestamp 

func (b *BaseEvent) GetTimestamp() uint32

GetTimestamp returns the timestamp of the event FIXME

func (*BaseEvent) GetType 

func (b *BaseEvent) GetType() uint32

GetType returns the type of this event FIXME

func (*BaseEvent) Trigger 

func (b *BaseEvent) Trigger()

Trigger is invoked when the event is triggered

type CloseEvent 

type CloseEvent struct {
	BaseEvent
}

CloseEvent is invoked when the window requests to close.

type Color 

type Color struct {
	R, G, B, A uint8
}

Color is an RGBA colour

func HexRGB 

func HexRGB(col uint32) *Color

HexRGB will convert the given hex uint32 value to a Color TODO: alpha channel >> 24.

func RGB 

func RGB(r, g, b int) *Color

RGB will create a colour from the given RGB, alpha is set to full.

func RGBA 

func RGBA(r, g, b, a int) *Color

RGBA will create a colour from the given r, g, b, a

func (Color) AsHex 

func (c Color) AsHex() uint32

AsHex will return the Color as a uint32/hex

func (*Color) Equals 

func (c *Color) Equals(o *Color) bool

Equals will compare this colour with another colour o including alpha channels.

func (Color) ToSDLColor 

func (c Color) ToSDLColor() sdl.Color

ToSDLColor Converts to an SDL colour object

type Focus 

type Focus int

Focus represents the state of focus for the window 

const (
	FocusGained Focus = iota
	FocusLost
)

Currently two types: focus gained, and focus lost. i.e. the window is clicked onto or the window is clicked off of.

type Font 

type Font struct {
	*ttf.Font
	// contains filtered or unexported fields
}

Font is a TrueTypeFont, stores the path as well as the texture cache for the glyphs

func LoadFont 

func LoadFont(path string, size int) (*Font, error)

LoadFont will try and load the font from the given path of the given size.

func (*Font) DeriveFont 

func (f *Font) DeriveFont(size int) (*Font, error)

DeriveFont will create a new font object from this font of a different size.

func (*Font) Destroy 

func (f *Font) Destroy()

Destroy will destroy the given font as well as clear the texture cache.

type Image 

type Image struct {
	*sdl.Texture
	*sdl.Surface
	Width, Height int
}

Image wraps a SDL texture _and_ SDL surface

func LoadImage 

func LoadImage(path string) (*Image, error)

LoadImage will load the image at the given path. It will return the loaded image, and any errors encountered.

func (*Image) Destroy 

func (i *Image) Destroy()

Destroy must be invoked when finished with the resource.

func (*Image) GetSurface 

func (i *Image) GetSurface() *sdl.Surface

GetSurface returns a pointer to the SDL_Surface object

type KeyDownEvent 

type KeyDownEvent struct {
	BaseEvent
	KeyCode int
}

KeyDownEvent is invoked when a key is pressed and held down

type KeyUpEvent 

type KeyUpEvent struct {
	BaseEvent
	KeyCode int
}

KeyUpEvent is invoked when the key is _released_

type KeyboardHandler 

type KeyboardHandler struct {
	// contains filtered or unexported fields
}

KeyboardHandler is a wrapper to handle key press

type MouseButtonState 

type MouseButtonState int

MouseButtonState contains the state of the mouse button, i.e. if its left/right is down no buttons are down, or the scroll wheel is clicked 

const (
	NoMouseButtonsDown MouseButtonState = iota
	LeftMouseButton
	RightMouseButton
	ScrollWheel
)

The types of mouse button state.

func MouseButtonsState 

func MouseButtonsState() MouseButtonState

MouseButtonsState returns the current state of the mouse

type MouseHandler 

type MouseHandler struct {
	X, Y        int
	ButtonState MouseButtonState
}

MouseHandler is a wrapper to store the X, Y location of the mouse + the current state

type MouseMoveEvent 

type MouseMoveEvent struct {
	BaseEvent
	X, Y int
}

MouseMoveEvent represents a mouse movement event

type MouseWheelEvent 

type MouseWheelEvent struct {
	BaseEvent
	X, Y int
}

MouseWheelEvent represents a mouse scroll wheel event

type RenderConfig 

type RenderConfig struct {
	Alias        bool
	Accelerated  bool
	VerticalSync bool
}

RenderConfig is the configuration settings for the renderer. Alias => Controls if the fonts are smoothed; Accelerated => The renderer is hardware accelerated if true; and VerticalSync => Will synchronize the FPS with the monitors refresh rate

func DefaultConfig 

func DefaultConfig() *RenderConfig

DefaultConfig with all of the rendering options enabled.

func GoGoStrifeFast 

func GoGoStrifeFast() *RenderConfig

GoGoStrifeFast is the default configuration with all pretty settings turned off. vertical synchronisation is enabled.

type RenderWindow 

type RenderWindow struct {
	*sdl.Window
	// contains filtered or unexported fields
}

RenderWindow is a window context with a rendererer. It contains the handlers for events, as well as the render configuration options.

func SetupRenderWindow 

func SetupRenderWindow(w, h int, config *RenderConfig) *RenderWindow

SetupRenderWindow will create a render window of the given width and height, with the specified configuration. You can specify a default configuration with `strife.DefaultConfig()`. Note that this will spawn the window at the centre of the main display.

func (*RenderWindow) AllowHighDPI added in v0.2.0 

func (w *RenderWindow) AllowHighDPI()

AllowHighDPI will allow a high DPI, must be called before Create()

func (*RenderWindow) Close 

func (w *RenderWindow) Close()

Close will close the render window and destroy the context.

func (*RenderWindow) CloseRequested 

func (w *RenderWindow) CloseRequested() bool

CloseRequested will return if the window has had a CloseRequest even triggered.

func (*RenderWindow) Create 

func (w *RenderWindow) Create() error

Create window take all of the settings and create a window with a rendering context

func (*RenderWindow) GetRenderContext 

func (w *RenderWindow) GetRenderContext() *Renderer

GetRenderContext returns the render context

func (*RenderWindow) GetSize 

func (w *RenderWindow) GetSize() (int, int)

GetSize will return the window width and height

func (*RenderWindow) HandleEvents 

func (w *RenderWindow) HandleEvents(handler func(StrifeEvent))

HandleEvents will set the event handler predicate.

func (*RenderWindow) PollEvents 

func (w *RenderWindow) PollEvents()

PollEvents will poll for any events. All events are unhandled, _except_ for the Quit Event, which will destroy the render context, render window, and cause this function to return true.

func (*RenderWindow) SetIconImage 

func (w *RenderWindow) SetIconImage(img *Image)

SetIconImage will set the window icon from the given Image

func (*RenderWindow) SetResizable 

func (w *RenderWindow) SetResizable(resizable bool)

SetResizable will add the resizable flag, must be called before Create()

type Renderer 

type Renderer struct {
	RenderConfig
	*sdl.Renderer
	// contains filtered or unexported fields
}

Renderer contains the renderers current configuration, as well as the colour state and font state and a wrapper over the SDL renderer. 

var RenderInstance *Renderer

RenderInstance is the current render instance, in an ideal world this will only be set once. This is exists because SDL wants to have the render instance for loading images, fonts, etc.

func CreateRenderer 

func CreateRenderer(parent *RenderWindow, config *RenderConfig) (*Renderer, error)

CreateRenderer will create a rendering instance for the given window. It takes the configuration specifying if the renderer is software or hardware accelerated, as well as if the renderer should be vertically synchronized. It returns the renderer and any error that is encountered during the creation.

func (*Renderer) Clear 

func (r *Renderer) Clear()

Clear will clear the screen to black. By default it will immediately set the colour state to render things as white.

func (*Renderer) Display 

func (r *Renderer) Display()

Display the renderer to the window

func (*Renderer) GetFont 

func (r *Renderer) GetFont() *Font

GetFont returns the current font that was last set

func (*Renderer) GetSize added in v0.2.0 

func (r *Renderer) GetSize() (int, int)

GetSize returns the size of the renderer. on error it will return -1, -1

func (*Renderer) GetStringDimension added in v0.2.2 

func (r *Renderer) GetStringDimension(message string) (int, int)

func (*Renderer) Image 

func (r *Renderer) Image(image *Image, x, y int)

Image will render the given image at the given x, y co-ordinates at the images full size.

func (*Renderer) ImageScale 

func (r *Renderer) ImageScale(image *Image, x, y, w, h int)

ImageScale will render the image at the given co-ordinate scaled to the given size.

func (*Renderer) Rect 

func (r *Renderer) Rect(x, y, w, h int, mode Style)

Rect will draw a rectangle at the given x, y co-ordinates of the specified size. It takes the mode to render the rectangle as: fill or line.

func (*Renderer) SetColor 

func (r *Renderer) SetColor(color *Color)

SetColor sets the current colour state

func (*Renderer) SetFont 

func (r *Renderer) SetFont(font *Font)

SetFont will set the font state

func (*Renderer) SubImage 

func (r *Renderer) SubImage(image *Image, x, y int, tx, ty, tw, th int)

SubImage will render a sub-section of the given image. tx, ty are the x, y pixel coordinates of the sub-image in the image to render. tw, th are the size of the sub-image.

func (*Renderer) SubImageScale 

func (r *Renderer) SubImageScale(image *Image, x, y int, tx, ty, tw, th int, sw, sh int)

SubImageScale will render a sub-section of the given image scaled to the given width and height. See the documentation for SubImage.

func (*Renderer) Text added in v0.2.0 

func (r *Renderer) Text(message string, x, y int) (int, int)

Text renders the given text to the given x, y coordinates. Note that the text is cached, i.e. each glyph rendered will be cached and re-used. UncachedText is the alternative, though it's slower.

func (*Renderer) UncachedText added in v0.2.0 

func (r *Renderer) UncachedText(message string, x, y int) (int, int)

UncachedText is the same as Text, it draws the given string to the given x,y note that it doesn't cache the glyphs, however, so should not be used for lots of text rendering!

type StrifeEvent 

type StrifeEvent interface {
	sdl.Event
	Trigger()
}

StrifeEvent wraps an SDL event

type Style 

type Style uint

Style to render primitive shapes (Rectangles, Circles, etc). Fill meaning fill the shape with colour, and Line meaning to draw the outline of the shape. 

const (
	Line Style = iota
	Fill
)

Types of render styles, Line for stroke e.g. outline of a shape, vs fill which will fill a rectangle.

type Visibility 

type Visibility int

Visibility of the window, e.g. hidden, shown. 

const (
	Shown Visibility = iota
	Hidden
	Exposed
)

The types of visibilities available for the window.

type WindowFocusEvent 

type WindowFocusEvent struct {
	BaseEvent
	Focus
}

WindowFocusEvent ...

type WindowMoveEvent 

type WindowMoveEvent struct {
	BaseEvent
	X, Y int
}

WindowMoveEvent is invoked when the window is moved contains the new x, y position of the window.

type WindowResizeEvent 

type WindowResizeEvent struct {
	BaseEvent
	Width, Height int
}

WindowResizeEvent is invoked when the window is resized. contains the new width and height

type WindowVisibilityEvent 

type WindowVisibilityEvent struct {
	BaseEvent
	Visibility
}

WindowVisibilityEvent ...

Source Files

View all Source files

Directories

Path Synopsis
example
images
keypress
particles
rectangle
text

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.