mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-05-30 15:02:56 +00:00
11c807ebd1
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`
41 lines
976 B
C++
41 lines
976 B
C++
/*
|
|
* Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibSoftGPU/StencilBuffer.h>
|
|
|
|
namespace SoftGPU {
|
|
|
|
ErrorOr<NonnullOwnPtr<StencilBuffer>> StencilBuffer::try_create(Gfx::IntSize const& size)
|
|
{
|
|
auto rect = Gfx::IntRect { 0, 0, size.width(), size.height() };
|
|
auto data = TRY(FixedArray<u8>::try_create(size.area()));
|
|
return adopt_own(*new StencilBuffer(rect, move(data)));
|
|
}
|
|
|
|
StencilBuffer::StencilBuffer(Gfx::IntRect const& rect, FixedArray<u8> data)
|
|
: m_data(move(data))
|
|
, m_rect(rect)
|
|
{
|
|
}
|
|
|
|
void StencilBuffer::clear(Gfx::IntRect rect, u8 value)
|
|
{
|
|
rect.intersect(m_rect);
|
|
|
|
for (int y = rect.top(); y <= rect.bottom(); ++y) {
|
|
auto* line = scanline(y);
|
|
for (int x = rect.left(); x <= rect.right(); ++x)
|
|
line[x] = value;
|
|
}
|
|
}
|
|
|
|
u8* StencilBuffer::scanline(int y)
|
|
{
|
|
VERIFY(m_rect.contains_vertically(y));
|
|
return &m_data[y * m_rect.width()];
|
|
}
|
|
|
|
}
|