def to_binary(self):
"""
struct rgb {
u8 r, g, b;
}
struct data {
u8 pixel_format;
u8 entry_bits;
u16 lut_entry_count;
rgb lut[lut_entry_count]
};
:return: binary
"""
bins = struct.pack('<BBH', self._pixel_format.value, self.entry_bits,
len(self._lut))
for i in range(len(self._lut)):
r, g, b = ImageUtil.rgb(self._lut[i])
bins += struct.pack('<BBB', r, g, b)
while len(bins) % 4 != 0:
bins += b'\x00'
return bins
def _fill_rect(self, window_line_buf, window, y, block_x):
if self._gradient_mode == GradientMode.NONE:
return
width = window.width if self._width == 0 else self._width
height = window.height if self._height == 0 else self._height
bg_color_start = self.get_color(self._bgcolor_start)
bg_color_end = self.get_color(self._bgcolor_end)
color_steps = 1
fill_width = width - self._border_weight * 2
fill_height = height - self._border_weight * 2
if self._gradient_mode == GradientMode.LEFT_TO_RIGHT:
color_steps = fill_width
elif self._gradient_mode == GradientMode.TOP_TO_BOTTOM:
color_steps = fill_height
elif self._gradient_mode == GradientMode.TOP_LEFT_TO_BOTTOM_RIGHT or \
self._gradient_mode == GradientMode.BOTTOM_LEFT_TO_TOP_RIGHT:
color_steps = fill_width * fill_height
elif self._gradient_mode == GradientMode.CORNER_TO_CENTER:
color_steps = (fill_width * fill_height) >> 2
r_start, g_start, b_start = ImageUtil.rgb(bg_color_start)
r_end, g_end, b_end = ImageUtil.rgb(bg_color_end)
r_delta = (r_end - r_start) / color_steps
g_delta = (g_end - g_start) / color_steps
b_delta = (b_end - b_start) / color_steps
for x in range(block_x + self._border_weight,
block_x + width - self._border_weight):
fill_x = x - (block_x + self._border_weight)
fill_y = y - self._border_weight
if self._gradient_mode == GradientMode.SOLID:
factor = 0
elif self._gradient_mode == GradientMode.LEFT_TO_RIGHT:
factor = fill_x
elif self._gradient_mode == GradientMode.TOP_TO_BOTTOM:
factor = y
elif self._gradient_mode == GradientMode.TOP_LEFT_TO_BOTTOM_RIGHT:
factor = fill_x * fill_y
elif self._gradient_mode == GradientMode.BOTTOM_LEFT_TO_TOP_RIGHT:
factor = fill_x * (fill_height - fill_y)
elif self._gradient_mode == GradientMode.CORNER_TO_CENTER:
if fill_x <= (fill_width >> 1):
factor_x = fill_x
else:
factor_x = fill_width - fill_x
if fill_y <= (fill_height >> 1):
factor_y = fill_y
else:
factor_y = (fill_height - fill_y)
factor = factor_x * factor_y
else:
raise Exception('Unknown gradient mode <%s>' %
self._gradient_mode.name)
color = ImageUtil.color_add(bg_color_start, r_delta * factor,
g_delta * factor, b_delta * factor)
if 0 <= x < window.width:
window_line_buf[x] = color