def from_matrix(cls, matrix):
"""Creates a texture from given matrix file.
:param matrix: The matrix.
:type matrix: list
:returns: The texture instance.
:rtype: :class:`renderer.Texture`
"""
w, h = len(matrix[0]), len(matrix)
grid = bytes(chain.from_iterable(reversed(matrix)))
tex = glGenTextures(1)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, tex)
# This code is necessary to handle non-power-of-two textures with small
# sizes.
# TODO: refactor this
param_ids = [
GL_UNPACK_ALIGNMENT,
GL_UNPACK_ROW_LENGTH,
GL_UNPACK_SKIP_ROWS,
GL_UNPACK_SKIP_PIXELS,
]
old_params = {
p: glGetInteger(p)
for p in param_ids
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 1)
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0)
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0)
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0)
glTexStorage2D(GL_TEXTURE_2D, 1, GL_R8, w, h)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, GL_RED, GL_UNSIGNED_BYTE, grid)
for p, v in old_params.items():
glPixelStorei(p, v)
glBindTexture(GL_TEXTURE_2D, 0)
return Texture(tex, w, h, GL_TEXTURE_2D)
def render_to_texture(self, text):
"""Renders the given string to a texture object.
:param text: Text to render.
:type text: str
:returns: The resulting texture object.
:rtype: :class:`renderer.Texture`
"""
# render the text to a SDL_Surface structure
surf_ptr = ttf.TTF_RenderText_Solid(
self.font,
text.encode('utf8'),
sdl.SDL_Color())
if not surf_ptr:
raise SDLError('failed to render text to surface: {}'.format(
ttf.TTF_GetError()))
# retrieve a pointer to pixel data
surf = surf_ptr.contents
pixels = ctypes.cast(surf.pixels, ctypes.POINTER(ctypes.c_char))
# create and fill an OpenGL rectangle texture (that is, a texture which
# can have arbitrary non-power-of-two size and is accessed using
# UV coordinates which are linearly mapped to the texture size)
tex = glGenTextures(1)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, tex)
glTexStorage2D(GL_TEXTURE_2D, 1, GL_R8, surf.w, surf.h)
glTexSubImage2D(
GL_TEXTURE_2D,
0,
0,
0,
surf.w,
surf.h,
GL_RED,
GL_UNSIGNED_BYTE,
pixels)
glBindTexture(GL_TEXTURE_2D, 0)
sdl.SDL_FreeSurface(surf_ptr)
return Texture(tex, surf.w, surf.h, GL_TEXTURE_2D)
def from_image(cls, image):
"""Creates a texture from given image file.
:param image: Image.
:type image: :class:`PIL.Image`
:returns: The texture instance.
:rtype: :class:`renderer.Texture`
"""
w, h = image.size
tex = glGenTextures(1)
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, tex)
glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGB8, w, h)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, image.tobytes())
glBindTexture(GL_TEXTURE_2D, 0)
return Texture(tex, w, h)