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metalShaderView.py
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metalShaderView.py
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from pathlib import Path
import ctypes
from objc_util import c, create_objc_class, ObjCClass, ObjCInstance
import ui
import editor
shader_path = Path(editor.get_path())
if not(str(shader_path) in '.metal'):
root_path = Path(__file__).parent
shader_path = root_path / Path('./Shaders.metal')
# --- load objc classes
MTKView = ObjCClass('MTKView')
# --- initialize MetalDevice
MTLCreateSystemDefaultDevice = c.MTLCreateSystemDefaultDevice
MTLCreateSystemDefaultDevice.argtypes = []
MTLCreateSystemDefaultDevice.restype = ctypes.c_void_p
err_ptr = ctypes.c_void_p()
class MetalView(ui.View):
def __init__(self, *args, **kwargs):
ui.View.__init__(self, *args, **kwargs)
self.view_did_load()
self.touch_txt = ui.Label()
self.touch_txt.width = self.s_size
self.add_subview(self.touch_txt)
def touch_began(self, touch):
self.passToShader(touch)
def touch_moved(self, touch):
self.passToShader(touch)
def passToShader(self, touch):
_x, _y = touch.location
if 0 < _x < self.s_size:
_x /= self.s_size
self.pre_mouse[0] = self.mouse[0] = _x
else:
self.mouse[0] = self.pre_mouse[0]
if 0 < _y < self.s_size:
_y /= self.s_size
self.pre_mouse[1] = self.mouse[1] = _y
else:
self.mouse[1] = self.pre_mouse[1]
def view_did_load(self):
mtkView = MTKView.alloc()
_device = MTLCreateSystemDefaultDevice()
devices = ObjCInstance(_device)
# todo: 端末サイズにて要調整
s_size = int(min(ui.get_window_size()) * 0.88)
_frame = ((0.0, 0.0), (s_size, s_size))
self.width = s_size
self.height = s_size
self.s_size = s_size
mtkView.initWithFrame_device_(_frame, devices)
#mtkView.setAutoresizingMask_((1 << 1) | (1 << 4))
renderer = self.renderer_init(PyRenderer, mtkView)
mtkView.delegate = renderer
#mtkView.enableSetNeedsDisplay = True
mtkView.framebufferOnly = False
#mtkView.setNeedsDisplay()
self.objc_instance.addSubview_(mtkView)
def renderer_init(self, delegate, _mtkView):
renderer = delegate.alloc().init()
device = _mtkView.device()
renderer.commandQueue = device.newCommandQueue()
# --- registerShaders
source = shader_path.read_text('utf-8')
library = device.newLibraryWithSource_options_error_(
source, err_ptr, err_ptr)
kernel = library.newFunctionWithName_('compute')
# maxTotalThreadsPerThreadgroup: 1024
# threadExecutionWidth: 32
renderer.cps = device.newComputePipelineStateWithFunction_error_(
kernel, err_ptr)
renderer.tew = renderer.cps.threadExecutionWidth()
renderer.mttpt = renderer.cps.maxTotalThreadsPerThreadgroup()
renderer.timer = ctypes.c_float(0.0)
renderer.timerBuffer = device.newBufferWithLength_options_(
ctypes.sizeof(renderer.timer), 0)
self.timer = renderer.timer
renderer.mouse = (ctypes.c_float * 2)(-1.0, -1.0)
renderer.mouseBuffer = device.newBufferWithLength_options_(
ctypes.sizeof(renderer.mouse), 0)
self.mouse = renderer.mouse
self.pre_mouse = self.mouse
return renderer
# --- MTKViewDelegate
def drawInMTKView_(_self, _cmd, _view):
self = ObjCInstance(_self)
view = ObjCInstance(_view)
drawable = view.currentDrawable()
commandBuffer = self.commandQueue.commandBuffer()
commandEncoder = commandBuffer.computeCommandEncoder()
commandEncoder.setComputePipelineState_(self.cps)
commandEncoder.setTexture_atIndex_(drawable.texture(), 0)
commandEncoder.setBuffer_offset_atIndex_(self.mouseBuffer, 0, 2)
commandEncoder.setBuffer_offset_atIndex_(self.timerBuffer, 0, 1)
# --- update
self.timer.value += 0.01
timerBufferPointer = self.timerBuffer.contents()
ctypes.memmove(timerBufferPointer,
ctypes.byref(self.timer), ctypes.sizeof(self.timer))
mouseBufferPointer = self.mouseBuffer.contents()
ctypes.memmove(mouseBufferPointer,
ctypes.byref(self.mouse), ctypes.sizeof(self.mouse))
_width = 8
_height = 8
_depth = 1
threadGroupCount = (_width, _height, _depth)
t_w = drawable.texture().width()
t_h = drawable.texture().height()
threadGroups = (-(-t_w // _width), -(-t_h // _height), 1)
commandEncoder.dispatchThreadgroups_threadsPerThreadgroup_(
threadGroups, threadGroupCount)
commandEncoder.endEncoding()
commandBuffer.presentDrawable_(drawable)
commandBuffer.commit()
#commandBuffer.waitUntilCompleted()
def mtkView_drawableSizeWillChange_(_self, _cmd, _view, _size):
self = ObjCInstance(_self)
view = ObjCInstance(_view)
PyRenderer = create_objc_class(
name='PyRenderer',
methods=[drawInMTKView_, mtkView_drawableSizeWillChange_],
protocols=['MTKViewDelegate'])
class MainView(ui.View):
def __init__(self, *args, **kwargs):
ui.View.__init__(self, *args, **kwargs)
interval = 60
self.update_interval = 1 / interval
self.bg_color = '#242424'
self.metal = MetalView()
self.metal.flex = 'LRTB'
self.add_subview(self.metal)
self.log_txt = ui.TextView()
self.log_txt.font = ('Source Code Pro', 16)
self.log_txt.bg_color = 1
self.log_txt.flex = 'W'
self.log_txt.editable = False
log = self.get_log()
self.log_txt.text = f'time\t\t: {str(log[0])}\ntouch_x\t: {str(log[1])}\ntouch_y\t: {str(log[2])}'
self.add_subview(self.log_txt)
def update(self):
log = self.get_log()
self.log_txt.text = f'time\t\t: {str(log[0])}\ntouch_x\t: {str(log[1])}\ntouch_y\t: {str(log[2])}'
def get_log(self):
timer = self.metal.timer.value
mouse_x = self.metal.mouse[0]
mouse_y = self.metal.mouse[1]
return [timer, mouse_x, mouse_y]
if __name__ == '__main__':
main_view = MainView()
main_view.present(style='fullscreen', orientations=['portrait'])