| Modifier and Type | Method and Description |
|---|---|
| public void | drawPixelsMasked(RTTexture
the texture containing the source image pixels imgtex, RTTexture the texture containing the mask pixels, only the
alpha channel is used from this texture masktex, int the X coordinate of the UL destination pixel dx, int the Y coordinate of the UL destination pixel dy, int the width of the pixel regions to be combined dw, int the height of the pixel regions to be combined dh, int the X coordinate of the UL pixel in the image texture ix, int the Y coordinate of the UL pixel in the image texture iy, int the X coordinate of the UL pixel in the mask texture mx, int the Y coordinate of the UL pixel in the mask texture my)Apply a mask to the pixels of an image and render the results onto the destination in device space. |
| public void | maskInterpolatePixels(RTTexture
the texture containing the source image pixels imgtex, RTTexture the texture containing the mask pixels, only the
alpha channel is used from this texture masktex, int the X coordinate of the UL destination pixel dx, int the Y coordinate of the UL destination pixel dy, int the width of the pixel regions to be combined dw, int the height of the pixel regions to be combined dh, int the X coordinate of the UL pixel in the image texture ix, int the Y coordinate of the UL pixel in the image texture iy, int the X coordinate of the UL pixel in the mask texture mx, int the Y coordinate of the UL pixel in the mask texture my)Use a mask to determine which pixels of an image are to be rendered onto the destination in device space. |
| drawPixelsMasked | back to summary |
|---|---|
| public void drawPixelsMasked(RTTexture imgtex, RTTexture masktex, int dx, int dy, int dw, int dh, int ix, int iy, int mx, int my) Apply a mask to the pixels of an image and render the results onto the destination in device space. All coordinates specify pixel coordinates and are integers to reinforce the fact that these are pixel operations, not coordinate rendering operations. The image texture is combined with the mask texture by multiplying the pixels in the image texture by the alpha in the mask texture and then the result is applied to the destination using the current compositing rule (which should likely be SrcOver in most cases).
dst.argb = (img.argb * mask.a) Composite dst.argb
| |
| maskInterpolatePixels | back to summary |
|---|---|
| public void maskInterpolatePixels(RTTexture imgtex, RTTexture masktex, int dx, int dy, int dw, int dh, int ix, int iy, int mx, int my) Use a mask to determine which pixels of an image are to be rendered onto the destination in device space. All coordinates specify pixel coordinates and are integers to reinforce the fact that these are pixel operations, not coordinate rendering operations. The mask texture controls the contribution of source and destination pixels in the resulting output. Note that a simple multiply of the source texture by the mask texture may not produce the correct masking operation for the case where a non-SrcOver blending mode is in use. In those conditions, it is more accurate to first compute the result of blending the source into the destination and to then use this method to choose how much of the result should be taken from the results of the blending and how much should remain the original destination pixel value. Mathematically, the mask alpha controls a linear interpolation between the image and destination pixels.
dst.argb = (mask.a * img.argb) + ((1 - mask.a) * dst.argb)
Note that the current composite mode is ignored during this operation.
| |