def get_text_matrix(self):
"""
temporarily not implemented. can perhaps get the _textmatrix object off
of the canvas if we need to.
"""
a, b, c, d, tx, ty = self.gc._textMatrix
#print "get text matrix", a,b,c,d,tx,ty
return affine.affine_from_values(a, b, c, d, tx, ty)
def draw_image(self, img, rect=None, force_copy=False):
""" Renders a GraphicsContextArray into this GC """
xform = self.get_ctm()
x0 = xform[4]
y0 = xform[5]
image = image_as_array(img)
shape = image.shape
if shape[2] == 4:
fmt = "RGBA"
else:
fmt = "RGB"
aii = ArrayImage(image, format=fmt)
texture = aii.texture
# The texture coords consists of (u,v,r) for each corner of the
# texture rectangle. The coordinates are stored in the order
# bottom left, bottom right, top right, top left.
x, y, w, h = rect
texture.width = w
texture.height = h
t = texture.tex_coords
points = array([
[x, y+h],
[x+w, y+h],
[x+w, y],
[x, y],
])
p = transform_points(affine_from_values(*xform), points)
a = (gl.GLfloat*32)(
t[0], t[1], t[2], 1.,
p[0,0], p[0,1], 0, 1.,
t[3], t[4], t[5], 1.,
p[1,0], p[1,1], 0, 1.,
t[6], t[7], t[8], 1.,
p[2,0], p[2,1], 0, 1.,
t[9], t[10], t[11], 1.,
p[3,0], p[3,1], 0, 1.,
)
gl.glPushAttrib(gl.GL_ENABLE_BIT)
gl.glEnable(texture.target)
gl.glBindTexture(texture.target, texture.id)
gl.glPushClientAttrib(gl.GL_CLIENT_VERTEX_ARRAY_BIT)
gl.glInterleavedArrays(gl.GL_T4F_V4F, 0, a)
gl.glDrawArrays(gl.GL_QUADS, 0, 4)
gl.glPopClientAttrib()
gl.glPopAttrib()