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LibGL+LibSoftGPU: Implement the stencil buffer

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This implements an 8-bit front stencil buffer. Stencil operations are
SIMD optimized. LibGL changes include:

* New `glStencilMask` and `glStencilMaskSeparate` functions
* New context parameter `GL_STENCIL_CLEAR_VALUE`
This commit is contained in:
Jelle Raaijmakers 2022-01-16 22:48:46 +01:00 • committed by Andreas Kling
parent 6386671944
commit 11c807ebd1
13 changed files with 430 additions and 77 deletions
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11
AK/SIMDExtras.h
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@ -109,6 +109,17 @@ ALWAYS_INLINE static f32x4 load4_masked(float const* a, float const* b, float co
};
}
ALWAYS_INLINE static i32x4 load4_masked(u8 const* a, u8 const* b, u8 const* c, u8 const* d, i32x4 mask)
{
int bits = maskbits(mask);
return i32x4 {
bits & 1 ? *a : 0,
bits & 2 ? *b : 0,
bits & 4 ? *c : 0,
bits & 8 ? *d : 0,
};
}
ALWAYS_INLINE static u32x4 load4_masked(u32 const* a, u32 const* b, u32 const* c, u32 const* d, i32x4 mask)
{
int bits = maskbits(mask);