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LibGL: Implement GL_TEXTURE_LOD_BIAS for texture objects

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Jelle Raaijmakers 2022-09-13 10:19:14 +02:00 • committed by Andreas Kling
parent 59fc2a4aad
commit eda1ffba73
3 changed files with 10 additions and 2 deletions
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5
Userland/Libraries/LibGL/Tex/Texture.h
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
* Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
@ -25,8 +26,12 @@ public:
RefPtr<GPU::Image> device_image() { return m_device_image; }
void set_device_image(RefPtr<GPU::Image> image) { m_device_image = image; }
float level_of_detail_bias() const { return m_level_of_detail_bias; }
void set_level_of_detail_bias(float level_of_detail_bias) { m_level_of_detail_bias = level_of_detail_bias; }
private:
RefPtr<GPU::Image> m_device_image;
float m_level_of_detail_bias { 0.f };
};
}

6
Userland/Libraries/LibGL/Texture.cpp
View file

@ -588,6 +588,7 @@ void GLContext::gl_tex_parameter(GLenum target, GLenum pname, GLfloat param)
// FIXME: implement the remaining parameters. (https://docs.gl/gl2/glTexParameter)
RETURN_WITH_ERROR_IF(pname != GL_GENERATE_MIPMAP
&& pname != GL_TEXTURE_LOD_BIAS
&& pname != GL_TEXTURE_MIN_FILTER
&& pname != GL_TEXTURE_MAG_FILTER
&& pname != GL_TEXTURE_WRAP_S
@ -603,6 +604,9 @@ void GLContext::gl_tex_parameter(GLenum target, GLenum pname, GLfloat param)
RETURN_WITH_ERROR_IF(param != GL_TRUE && param != GL_FALSE, GL_INVALID_ENUM);
texture_2d->set_generate_mipmaps(param == GL_TRUE);
break;
case GL_TEXTURE_LOD_BIAS:
texture_2d->set_level_of_detail_bias(param);
break;
case GL_TEXTURE_MIN_FILTER:
RETURN_WITH_ERROR_IF(!(param == GL_NEAREST
|| param == GL_LINEAR
@ -733,7 +737,7 @@ void GLContext::sync_device_sampler_config()
auto texture_2d = texture_unit.texture_2d_target_texture();
VERIFY(!texture_2d.is_null());
config.bound_image = texture_2d->device_image();
config.level_of_detail_bias = texture_unit.level_of_detail_bias();
config.level_of_detail_bias = texture_2d->level_of_detail_bias() + texture_unit.level_of_detail_bias();
auto const& sampler = texture_2d->sampler();

1
Userland/Libraries/LibSoftGPU/Sampler.cpp
View file

@ -134,7 +134,6 @@ Vector4<AK::SIMD::f32x4> Sampler::sample_2d(Vector2<AK::SIMD::f32x4> const& uv)
if (m_config.mipmap_filter == GPU::MipMapFilter::None)
return sample_2d_lod(uv, expand4(base_level), m_config.texture_min_filter);
// FIXME: add texture-level support for GL_TEXTURE_LOD_BIAS; below is only texture unit-level
auto texture_lod_bias = AK::clamp(m_config.level_of_detail_bias, -MAX_TEXTURE_LOD_BIAS, MAX_TEXTURE_LOD_BIAS);
// FIXME: Instead of clamping to num_levels - 1, actually make the max mipmap level configurable with glTexParameteri(GL_TEXTURE_MAX_LEVEL, max_level)
auto min_level = expand4(static_cast<float>(base_level));