def addTexture(self, imgPath):
dir, file = path.split(imgPath)
if dir not in resource.path:
resource.path.append(dir)
resource.reindex()
texture = resource.texture(file)
self.textures.append(texture)
gl.glBindTexture(texture.target, texture.id)
gl.glGenerateMipmap(gl.GL_TEXTURE_2D)
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR)
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_NEAREST_MIPMAP_LINEAR)
def create_cubemap_texture(imgfiles):
"""Create a cubemap texture from image files.
:param imgfiles: a list of six strings specifying the path to the
cubemap images. In the order [pos+X, pos-X, pos+Y, ..., pos-Z]
"""
if len(imgfiles) != 6:
raise ValueError(
"exactly six images are required for a cubemap texture")
# generate a new texture
cubemap = gl.GLuint()
gl.glGenTextures(1, ct.pointer(cubemap))
# bind it to `GL_TEXTURE_CUBE_MAP` and set the filter and wrap mode
gl.glBindTexture(gl.GL_TEXTURE_CUBE_MAP, cubemap)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_MAG_FILTER,
gl.GL_LINEAR)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_MIN_FILTER,
gl.GL_LINEAR_MIPMAP_LINEAR)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_WRAP_S,
gl.GL_CLAMP_TO_EDGE)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_WRAP_T,
gl.GL_CLAMP_TO_EDGE)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_WRAP_R,
gl.GL_CLAMP_TO_EDGE)
# it seems we need to flip the images to make the cubemap look correct
faces = [ImageOps.flip(Image.open(img)) for img in imgfiles]
# set the faces of the cubemap texture
for i, face in enumerate(faces):
width, height = face.size
try:
data = face.tobytes("raw", "RGBX", 0, -1)
except TypeError:
data = face.tobytes("raw", "RGBA", 0, -1)
gl.glTexImage2D(
gl.GL_TEXTURE_CUBE_MAP_POSITIVE_X + i,
0,
gl.GL_RGBA,
width,
height,
0,
gl.GL_RGBA,
gl.GL_UNSIGNED_BYTE,
data,
)
gl.glGenerateMipmap(gl.GL_TEXTURE_CUBE_MAP)
gl.glBindTexture(gl.GL_TEXTURE_CUBE_MAP, 0)
return cubemap
def create_cubemap_texture(imgfiles):
"""Create a cubemap texture from image files.
"""
if len(imgfiles) != 6:
raise ValueError(
"exactly six images are required for a cubemap texture")
# generate a new texture
cubemap = gl.GLuint()
gl.glGenTextures(1, ct.pointer(cubemap))
# bind it to `GL_TEXTURE_CUBE_MAP` and set the filter and wrap mode
gl.glBindTexture(gl.GL_TEXTURE_CUBE_MAP, cubemap)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_MAG_FILTER,
gl.GL_LINEAR)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_MIN_FILTER,
gl.GL_LINEAR_MIPMAP_LINEAR)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_WRAP_S,
gl.GL_CLAMP_TO_EDGE)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_WRAP_T,
gl.GL_CLAMP_TO_EDGE)
gl.glTexParameteri(gl.GL_TEXTURE_CUBE_MAP, gl.GL_TEXTURE_WRAP_R,
gl.GL_CLAMP_TO_EDGE)
faces = [Image.open(img) for img in imgfiles]
# set the faces of the cubemap texture
for i, face in enumerate(faces):
width, height = face.size
try:
data = face.tobytes("raw", "RGBX", 0, -1)
except TypeError:
data = face.tobytes("raw", "RGBA", 0, -1)
gl.glTexImage2D(
gl.GL_TEXTURE_CUBE_MAP_POSITIVE_X + i,
0,
gl.GL_RGBA,
width,
height,
0,
gl.GL_RGBA,
gl.GL_UNSIGNED_BYTE,
data,
)
gl.glGenerateMipmap(gl.GL_TEXTURE_CUBE_MAP)
gl.glBindTexture(gl.GL_TEXTURE_CUBE_MAP, 0)
return cubemap
def build_mipmaps(self, base: int = 0, max_level: int = 1000) -> None:
"""Generate mipmaps for this texture. Leaveing the default arguments
will usually does the job. Building mipmaps will create several
smaller versions of the texture (256 x 256, 128 x 128, 64 x 64, 32 x 32 etc)
helping OpenGL in rendering a nicer version of texture
when it's rendered to the screen in smaller version.
Note that mipmaps will only be used if the texture filter is
configured with a mipmap-type minification::
# Set up linear interpolating minification filter
texture.filter = ctx.LINEAR_MIPMAP_LINEAR, ctx.LINEAR
:param int base: Level the mipmaps start at (usually 0)
:param int max_level: The maximum levels to generate
Also see: https://www.khronos.org/opengl/wiki/Texture#Mip_maps
"""
self.use()
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_BASE_LEVEL, base)
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAX_LEVEL, max_level)
gl.glGenerateMipmap(gl.GL_TEXTURE_2D)
def generate_mipmap(self):
if self.mipmap:
gl.glGenerateMipmap(self.target)
def generate_mipmaps(self):
gl.glGenerateMipmap(gl.GL_TEXTURE_2D_ARRAY)
def generate_mipmaps(self):
logging.debug(f"Generating Mipmaps, using mipmap type {options.MIPMAP_TYPE}")
gl.glGenerateMipmap(gl.GL_TEXTURE_2D_ARRAY)
def generate_mipmaps(self): gl.glBindTexture(gl.GL_TEXTURE_2D_ARRAY, self.texture_array) # make sure our texture is bound gl.glGenerateMipmap(gl.GL_TEXTURE_2D_ARRAY) # generate mipmaps for our texture
