gdkDrawRgbImageDithalign
Draws an RGB image in the drawable, with an adjustment for dither alignment.
gdkDrawRgbImageDithalign(object, gc, x, y, width, height, dith,
rgb.buf, xdith, ydith) |
The |
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The graphics context. |
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The x coordinate of the top-left corner in the drawable. |
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The y coordinate of the top-left corner in the drawable. |
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The width of the rectangle to be drawn. |
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The height of the rectangle to be drawn. |
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A |
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The pixel data, represented as packed 24-bit data. |
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An x offset for dither alignment. |
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A y offset for dither alignment. |
This function is useful when drawing dithered images into a window
that may be scrolled. Pixel (x, y) will be drawn dithered as if its
actual location is (x + xdith, y + ydith). Thus, if you draw an
image into a window using zero dither alignment, then scroll up one
pixel, subsequent draws to the window should have ydith = 1.
Setting the dither alignment correctly allows updating of small parts of the screen while avoiding visible "seams" between the different dither textures.
Derived by RGtkGen from GTK+ documentation
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