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72 lines
2.2 KiB
Python
72 lines
2.2 KiB
Python
# Image Drawing Alpha Blending Test
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#
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# This script tests the performance and quality of the draw_image()
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# method which can perform nearest neighbor, bilinear, bicubic, and
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# area scaling along with color channel extraction, alpha blending,
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# color palette application, and alpha palette application.
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import sensor, image, time
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sensor.reset()
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sensor.set_pixformat(sensor.RGB565)
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sensor.set_framesize(sensor.QVGA)
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hint = image.BICUBIC # image.BILINEAR image.BICUBIC
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small_img = image.Image(4, 4, sensor.RGB565)
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small_img.set_pixel(0, 0, (0, 0, 127))
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small_img.set_pixel(1, 0, (47, 255, 199))
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small_img.set_pixel(2, 0, (0, 188, 255))
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small_img.set_pixel(3, 0, (0, 0, 127))
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small_img.set_pixel(0, 1, (0, 176, 255))
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small_img.set_pixel(1, 1, (222, 0, 0 ))
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small_img.set_pixel(2, 1, (50, 255, 195))
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small_img.set_pixel(3, 1, (86, 255, 160))
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small_img.set_pixel(0, 2, (255, 211, 0 ))
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small_img.set_pixel(1, 2, (83, 255, 163))
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small_img.set_pixel(2, 2, (255, 211, 0))
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small_img.set_pixel(3, 2, (0, 80, 255))
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small_img.set_pixel(0, 3, (255, 118, 0 ))
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small_img.set_pixel(1, 3, (127, 0, 0 ))
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small_img.set_pixel(2, 3, (0, 144, 255))
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small_img.set_pixel(3, 3, (50, 255, 195))
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#small_img.to_grayscale()
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#small_img.to_bitmap()
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big_img = image.Image(128, 128, sensor.RGB565)
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big_img.draw_image(small_img, 0, 0, x_scale=32, y_scale=32, hint=hint)
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#big_img.to_grayscale()
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#big_img.to_bitmap()
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alpha_div = 1
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alpha_value = 0
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alpha_step = 2
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x_bounce = sensor.width()//2
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x_bounce_toggle = 1
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y_bounce = sensor.height()//2
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y_bounce_toggle = 1
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clock = time.clock()
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while(True):
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clock.tick()
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img = sensor.snapshot()
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#img.to_grayscale()
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#img.to_bitmap()
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img.draw_image(big_img, x_bounce, y_bounce,
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rgb_channel=-1, alpha=alpha_value//alpha_div,
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hint=hint|image.CENTER)
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x_bounce += x_bounce_toggle
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if abs(x_bounce-(img.width()//2)) >= (img.width()//2): x_bounce_toggle = -x_bounce_toggle
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y_bounce += y_bounce_toggle
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if abs(y_bounce-(img.height()//2)) >= (img.height()//2): y_bounce_toggle = -y_bounce_toggle
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alpha_value += alpha_step
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if not alpha_value or alpha_value//alpha_div == 256: alpha_step = -alpha_step
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print(clock.fps())
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