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LibGL: Turn Sampler2D into an actual class

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This extracts the sampler functionality into its own class.
Beginning with OpenGL 3 samplers are actual objects, separate
from textures. It makes sense to do this already as it also
cleans up code organization quite a bit.
This commit is contained in:
Stephan Unverwerth 2021-08-11 19:57:22 +02:00 • committed by Andreas Kling
parent fdde19d616
commit 12785849aa
7 changed files with 164 additions and 49 deletions
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21
Userland/Libraries/LibGL/Tex/Texture2D.cpp
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -112,24 +113,12 @@ void Texture2D::upload_texture_data(GLenum, GLint lod, GLint internal_format, GL
mip.set_height(height);
}
FloatVector4 Texture2D::sample_texel(const FloatVector2& uv) const
MipMap const& Texture2D::mipmap(unsigned lod) const
{
auto& mip = m_mipmaps.at(0);
if (lod >= m_mipmaps.size())
return m_mipmaps.at(m_mipmaps.size() - 1);
// FIXME: Remove this to prevent a crash when we have proper texture binding
if (mip.width() == 0 || mip.height() == 0)
return { 1.0f, 1.0f, 1.0f, 1.0f };
u32 u = static_cast<u32>(uv.x() * mip.width());
u32 v = static_cast<u32>(uv.y() * mip.height());
u32 pixel = mip.pixel_data().at(v * mip.width() + u);
float b0 = ((pixel)&0xff) / 255.0f;
float b1 = ((pixel >> 8) & 0xff) / 255.0f;
float b2 = ((pixel >> 16) & 0xff) / 255.0f;
return { b0, b1, b2, 1.0f };
return m_mipmaps.at(lod);
}
}