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LibGL+LibGPU+LibSoftGPU: Implement texture pixel format support

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In OpenGL this is called the (base) internal format which is an
expectation expressed by the client for the minimum supported texel
storage format in the GPU for textures.

Since we store everything as RGBA in a `FloatVector4`, the only thing
we do in this patch is remember the expected internal format, and when
we write new texels we fixate the value for the alpha channel to 1 for
two formats that require it.

`PixelConverter` has learned how to transform pixels during transfer to
support this.
This commit is contained in:
Jelle Raaijmakers 2022-08-26 15:59:51 +02:00 • committed by Andreas Kling
parent 6c80d12111
commit 84c4b66721
13 changed files with 141 additions and 32 deletions
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10
Userland/Libraries/LibGL/Texture.cpp
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@ -308,13 +308,6 @@ void GLContext::gl_tex_gen_floatv(GLenum coord, GLenum pname, GLfloat const* par
m_texcoord_generation_dirty = true;
}
// FIXME: talk to GPU::Device to determine supported GPU::PixelTypes
constexpr GPU::PixelType texture_fixed_pixel_type = {
.format = GPU::PixelFormat::RGBA,
.bits = GPU::PixelComponentBits::AllBits,
.data_type = GPU::PixelDataType::Float,
};
void GLContext::gl_tex_image_2d(GLenum target, GLint level, GLint internal_format, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, GLvoid const* data)
{
RETURN_WITH_ERROR_IF(m_in_draw_state, GL_INVALID_OPERATION);
@ -341,7 +334,8 @@ void GLContext::gl_tex_image_2d(GLenum target, GLint level, GLint internal_forma
// that constructing GL textures in any but the default mipmap order, going from level 0 upwards will cause mip levels to stay uninitialized.
// To be spec compliant we should create the device image once the texture has become complete and is used for rendering the first time.
// All images that were attached before the device image was created need to be stored somewhere to be used to initialize the device image once complete.
texture_2d->set_device_image(m_rasterizer->create_image(texture_fixed_pixel_type, width, height, 1, 999, 1));
auto internal_pixel_format = pixel_format_for_internal_format(internal_format);
texture_2d->set_device_image(m_rasterizer->create_image(internal_pixel_format, width, height, 1, 999, 1));
m_sampler_config_is_dirty = true;
}