Fastest way to erase a bitmap

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YesCop
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Fastest way to erase a bitmap

Hello there.
For AmigaOS4.1 last update.

I would want to find the best and fastest way to clear a (big like 1600x1050) bitmap.
For the moment I use BltClear from graphics library.
To use it I call LockBitmap before.

First, I have found that BltClear is not fast I supposed.
Second, it clears bitmap with 0. What could I do if I want to use a ARGB value?

Thanks for reading.

salass00
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Re: Fastest way to erase a bitmap
  1. void ClearBitMapARGB(struct BitMap *bm, uint32 argb) {
  2. struct RastPort temp_rp;
  3. int32 width, height;
  4.  
  5. width = IGraphics->GetBitMapAttr(bm, BMA_WIDTH);
  6. height = IGraphics->GetBitMapAttr(bm, BMA_HEIGHT);
  7.  
  8. IGraphics->InitRastPort(&temp_rp);
  9. temp_rp.BitMap = bm;
  10.  
  11. IGraphics->RectFillColor(&temp_rp, 0, 0, width - 1, height - 1, argb);
  12. }
YesCop
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Re: Fastest way to erase a bitmap

Thanks Salass.
I will test your solution as soon as possible.

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