class Canvas:
image: Image.Image
draw: ImageDraw.ImageDraw
vao: int
program: ShaderProgram
texture: int
width: int
height: int
font: ImageFont.ImageFont
def __init__(self, width, height):
self._createGlSurface()
self.texture = 0
self.resize(width, height)
self._createGlTexture()
self.width = width
self.height = height
self.program = ShaderProgram('shaders/guiShader.vert',
'shaders/guiShader.frag')
self.font = ImageFont.truetype('assets/minecraft_font.ttf', 16)
def resize(self, width, height):
self.width = width
self.height = height
self.image = Image.new("RGB", (width, height), color=ALPHA_COLOR)
self.draw = typing.cast(ImageDraw.ImageDraw,
ImageDraw.Draw(self.image, "RGBA"))
if self.texture == 0:
self._createGlTexture()
def create_oval(self, x0, y0, x1, y1, **kwargs):
if 'fill' in kwargs:
assert (kwargs['fill'] not in ['#000', '#000000', 'black'])
fill = kwargs.pop('fill', '#0000')
outline = kwargs.pop('outline', '#111F')
width = kwargs.pop('width', 1)
assert (len(kwargs) == 0)
self.draw.ellipse([x0, y0, x1, y1],
fill=fill,
outline=outline,
width=width)
def create_rectangle(self, x0, y0, x1, y1, **kwargs):
if 'fill' in kwargs:
assert (kwargs['fill'] not in ['#000', '#000000', 'black'])
fill = kwargs.pop('fill', '#0000')
outline = kwargs.pop('outline', '#111F')
width = kwargs.pop('width', 1)
assert (len(kwargs) == 0)
self.draw.rectangle([x0, y0, x1, y1],
fill=fill,
outline=outline,
width=width)
def create_text(self, x, y, **kwargs):
text = kwargs.pop('text')
fill = kwargs.pop('fill', '#FFF')
anchor = convertAnchor(kwargs.pop('anchor', 'center'))
font = kwargs.pop('font', ())
if len(kwargs) != 0:
print(kwargs)
assert (False)
self.draw.text((int(x), int(y)),
text=text,
fill=fill,
font=self.font,
anchor=anchor)
def create_image(self, x, y, **kwargs):
image = kwargs.pop('image')
anchor = kwargs.pop('anchor', 'center')
if len(kwargs) != 0:
print(kwargs)
assert (False)
if anchor == 'center':
x -= image.width // 2
y -= image.height // 2
else:
print(anchor)
assert (False)
mask = getCachedMask(image)
self.image.paste(image, box=(int(x), int(y)), mask=mask)
def _createGlSurface(self):
vertices = numpy.array(
[
1.0,
1.0,
1.0,
0.0, # top right
1.0,
-1.0,
1.0,
1.0, # bottom right
-1.0,
-1.0,
0.0,
1.0, # bottom left
-1.0,
1.0,
0.0,
0.0, # top left
],
dtype='float32')
indices = numpy.array([
0,
1,
3,
1,
2,
3,
], dtype='uint32')
vao: int = glGenVertexArrays(1) #type:ignore
vbo: int = glGenBuffers(1) #type:ignore
ebo: int = glGenBuffers(1) #type:ignore
glBindVertexArray(vao)
glBindBuffer(GL_ARRAY_BUFFER, vbo)
glBufferData(GL_ARRAY_BUFFER, vertices.nbytes, vertices,
GL_STATIC_DRAW)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo)
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.nbytes, indices,
GL_STATIC_DRAW)
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * 4,
ctypes.c_void_p(0))
glEnableVertexAttribArray(0)
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * 4,
ctypes.c_void_p(2 * 4))
glEnableVertexAttribArray(1)
glBindBuffer(GL_ARRAY_BUFFER, 0)
glBindVertexArray(0)
self.vao = vao
def _createGlTexture(self):
self.texture = glGenTextures(1) #type:ignore
glBindTexture(GL_TEXTURE_2D, self.texture)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glBindTexture(GL_TEXTURE_2D, 0)
def redraw(self):
arr = numpy.asarray(self.image.convert('RGBA'), dtype=numpy.uint8)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, self.texture)
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, self.image.width,
self.image.height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
arr) #type:ignore
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
self.program.useProgram()
glUniform3f(self.program.getUniformLocation("alphaColor"),
ALPHA_COLOR[0] / 255.0, ALPHA_COLOR[1] / 255.0,
ALPHA_COLOR[2] / 255.0)
glBindVertexArray(self.vao)
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT,
ctypes.c_void_p(0)) #type:ignore
#glBlendFunc(GL_SRC_ALPHA, GL_ZERO)
self.image = Image.new("RGB", (self.width, self.height),
color=ALPHA_COLOR)
self.draw = typing.cast(ImageDraw.ImageDraw,
ImageDraw.Draw(self.image, "RGBA"))
