def test_Surface_MakeFromBackendRenderTarget(context):
target = skia.GrBackendRenderTarget()
assert isinstance(
skia.Surface.MakeFromBackendRenderTarget(
context, target, skia.kTopLeft_GrSurfaceOrigin,
skia.kRGBA_8888_ColorType, skia.ColorSpace.MakeSRGB()),
(type(None), skia.Surface))
def new_skia_context_surface(w, h) -> (skia.GrDirectContext, skia.Surface):
glContext = skia.GrDirectContext.MakeGL()
fbInfo = skia.GrGLFramebufferInfo(0, 0x8058) # GL_RGBA8
target = skia.GrBackendRenderTarget(w, h, 0, 0, fbInfo)
surface = skia.Surface.MakeFromBackendRenderTarget(
glContext, target,
skia.GrSurfaceOrigin.kBottomLeft_GrSurfaceOrigin,
skia.ColorType.kRGBA_8888_ColorType, None)
return glContext, surface
def __init__(self, mmv_main, *args, **kwargs):
self.mmv_main = mmv_main
self.pyskt_context = PysktContext(self, *args, **kwargs)
self.pyskt_processing = PysktProcessing(self)
self.draw_utils = SkiaDrawUtils(self)
self.colors = PysktColors(self)
self.events = PysktEvents(self)
self.previous_mouse_pos = [0, 0]
self.mouse_moved = False
# Where stuff is rendered from and activated
self.components = []
# # # Make main window
# Init GLFW
if not glfw.init():
raise RuntimeError('glfw.init() failed')
# GLFW config
glfw.window_hint(glfw.STENCIL_BITS, 0)
glfw.window_hint(glfw.DEPTH_BITS, 0)
# glfw.window_hint(glfw.DECORATED, False)
glfw.window_hint(glfw.DOUBLEBUFFER, False)
# Create window
self.window = glfw.create_window(
self.pyskt_context.width,
self.pyskt_context.height,
kwargs.get("context_window_name", "PySKT Window"),
None,
None,
)
# Make context, init surface
glfw.make_context_current(self.window)
glfw.swap_interval(1)
context = skia.GrContext.MakeGL()
# Set render to a display compatible
backend_render_target = skia.GrBackendRenderTarget(
self.pyskt_context.width,
self.pyskt_context.height,
0, # sample count
0, # stencil bits
skia.GrGLFramebufferInfo(0, GL.GL_RGBA8))
# Create draw surface
self.surface = skia.Surface.MakeFromBackendRenderTarget(
context, backend_render_target, skia.kBottomLeft_GrSurfaceOrigin,
skia.kRGBA_8888_ColorType, skia.ColorSpace.MakeSRGB())
assert self.surface, 'Failed to create a surface'
self.canvas = self.surface.getCanvas()
def init(self, **kwargs) -> None:
debug_prefix = "[SkiaNoWindowBackend.init]"
self.width = kwargs["width"]
self.height = kwargs["height"]
# Assume to render on CPU if not said GPU, GPU is less "compatible"
self.render_backend = kwargs.get("render_backend", "cpu")
self.show_preview_window = kwargs.get("show_preview_window", True)
print(debug_prefix, f"Render backend is [{self.render_backend}]")
# GPU for rasterization, faster rendering but slower images transfers
if self.render_backend == "gpu":
self.glfw_context()
self.gl_context = skia.GrDirectContext.MakeGL()
if self.show_preview_window:
backend_render_target = skia.GrBackendRenderTarget(
self.width,
self.height,
0, # sampleCnt
0, # stencilBits
skia.GrGLFramebufferInfo(0, GL.GL_RGBA8))
self.info = skia.ImageInfo.MakeN32Premul(
self.width, self.height)
self.surface = skia.Surface.MakeFromBackendRenderTarget(
self.gl_context, backend_render_target,
skia.kBottomLeft_GrSurfaceOrigin,
skia.kRGBA_8888_ColorType, skia.ColorSpace.MakeSRGB())
else:
self.info = skia.ImageInfo.MakeN32Premul(
self.width, self.height)
self.surface = skia.Surface.MakeRenderTarget(
self.gl_context, skia.Budgeted.kNo, self.info)
# Use CPU for rasterizing, faster transportation of images but slow rendering
elif self.render_backend == "cpu":
self.surface = skia.Surface.MakeRasterN32Premul(
self.width, self.height)
else:
raise RuntimeError(
f"Wrong | Not found render backend: [{self.render_backend}]")
# Make sure the surface was created
assert self.surface is not None
# Get the canvas to draw on
with self.surface as canvas:
self.canvas = canvas
def skia_surface(window):
context = skia.GrContext.MakeGL()
backend_render_target = skia.GrBackendRenderTarget(
WIDTH,
HEIGHT,
0, # sampleCnt
0, # stencilBits
skia.GrGLFramebufferInfo(0, GL.GL_RGBA8))
surface = skia.Surface.MakeFromBackendRenderTarget(
context, backend_render_target, skia.kBottomLeft_GrSurfaceOrigin,
skia.kRGBA_8888_ColorType, skia.ColorSpace.MakeSRGB())
assert surface is not None
yield surface
context.abandonContext()
def __init__(self, window: Window):
self.window = window
self.context = skia.GrDirectContext.MakeGL()
self.render_target = skia.GrBackendRenderTarget(
self.window.size.x, self.window.size.y, 0, 0,
skia.GrGLFramebufferInfo(0, GL.GL_RGBA8))
self.surface = skia.Surface.MakeFromBackendRenderTarget(
self.context, self.render_target, skia.kBottomLeft_GrSurfaceOrigin,
skia.kRGBA_8888_ColorType, skia.ColorSpace.MakeSRGB())
self.canvas = self.surface.getCanvas()
def __init__(self, window):
self.window = window
self.context = skia.GrDirectContext.MakeGL()
self.width, self.height = glfw.get_window_size(window)
backend_render_target = skia.GrBackendRenderTarget(
self.width,
self.height,
0, # sampleCnt
0, # stencilBits
skia.GrGLFramebufferInfo(0, GL.GL_RGBA8))
self.surface = skia.Surface.MakeFromBackendRenderTarget(
self.context, backend_render_target, skia.kBottomLeft_GrSurfaceOrigin,
skia.kRGBA_8888_ColorType, skia.ColorSpace.MakeSRGB())
# typeface = skia.Typeface.MakeFromFile('JetBrainsMono-Regular.ttf')
self.font = skia.Font(skia.Typeface.MakeDefault(), size=40)
print(self.font)
self.text = skia.TextBlob.MakeFromString('drawTextBlob', self.font)
self.start = time.time()
assert self.surface is not None
def main():
if not glfw.init():
return
glfw.window_hint(glfw.STENCIL_BITS, 8)
window = glfw.create_window(WIDTH, HEIGHT, 'Hello World', None, None)
if not window:
glfw.terminate()
return
glfw.make_context_current(window)
context = skia.GrContext.MakeGL()
backend_render_target = skia.GrBackendRenderTarget(
WIDTH,
HEIGHT,
0, # sampleCnt
0, # stencilBits
skia.GrGLFramebufferInfo(0, gl.GL_RGBA8))
surface = skia.Surface.MakeFromBackendRenderTarget(
context, backend_render_target, skia.kBottomLeft_GrSurfaceOrigin,
skia.kRGBA_8888_ColorType, skia.ColorSpace.MakeSRGB())
assert surface is not None
start = time.time()
while (glfw.get_key(window, glfw.KEY_ESCAPE) != glfw.PRESS
and not glfw.window_should_close(window)):
t = time.time() - start
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
with surface as canvas:
canvas.drawCircle(100 + 10 * t, 100 + 10 * t, 40,
skia.Paint(Color=skia.ColorGREEN))
surface.flushAndSubmit()
glfw.swap_buffers(window)
glfw.poll_events()
context.abandonContext()
glfw.terminate()
def test_GrBackendRenderTarget_init(args):
assert isinstance(skia.GrBackendRenderTarget(*args),
skia.GrBackendRenderTarget)
def backend_render_target():
return skia.GrBackendRenderTarget()