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LibSoftGPU: Add Image class

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This serves as the storage for all image types. 1D, 2D, 3D, Cube and
image arrays.

Upon construction a full mipmap chain is generated and the image is
immutable afterwards with respect to its layout.
This commit is contained in:
Stephan Unverwerth 2021-12-18 23:48:07 +01:00 • committed by Brian Gianforcaro
parent a9e27b9a0f
commit 91ccf9958f
4 changed files with 235 additions and 0 deletions
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68
Userland/Libraries/LibSoftGPU/Image.h Normal file
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/*
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/RefCounted.h>
#include <AK/Vector.h>
#include <LibGfx/Vector3.h>
#include <LibGfx/Vector4.h>
#include <LibSoftGPU/ImageFormat.h>
namespace SoftGPU {
class Image final : public RefCounted<Image> {
public:
Image(ImageFormat format, unsigned width, unsigned height, unsigned depth, unsigned levels, unsigned layers);
ImageFormat format() const { return m_format; }
unsigned width() const { return m_width; }
unsigned height() const { return m_height; }
unsigned depth() const { return m_depth; }
unsigned level_width(unsigned level) const { return m_mipmap_sizes[level].x(); }
unsigned level_height(unsigned level) const { return m_mipmap_sizes[level].y(); }
unsigned level_depth(unsigned level) const { return m_mipmap_sizes[level].z(); }
unsigned num_levels() const { return m_num_levels; }
unsigned num_layers() const { return m_num_layers; }
FloatVector4 texel(unsigned layer, unsigned level, unsigned x, unsigned y, unsigned z) const
{
return unpack_color(texel_pointer(layer, level, x, y, z), m_format);
}
void set_texel(unsigned layer, unsigned level, unsigned x, unsigned y, unsigned z, FloatVector4 const& color)
{
pack_color(color, texel_pointer(layer, level, x, y, z), m_format);
}
private:
void const* texel_pointer(unsigned layer, unsigned level, unsigned x, unsigned y, unsigned z) const
{
auto size = m_mipmap_sizes[level];
return &m_data[m_mipchain_size * layer + m_mipmap_offsets[level] + (z * size.x() * size.y() + y * size.x() + x) * element_size(m_format)];
}
void* texel_pointer(unsigned layer, unsigned level, unsigned x, unsigned y, unsigned z)
{
auto size = m_mipmap_sizes[level];
return &m_data[m_mipchain_size * layer + m_mipmap_offsets[level] + (z * size.x() * size.y() + y * size.x() + x) * element_size(m_format)];
}
private:
ImageFormat m_format { ImageFormat::RGBA8888 };
unsigned m_width { 0 };
unsigned m_height { 0 };
unsigned m_depth { 0 };
unsigned m_num_levels { 0 };
unsigned m_num_layers { 0 };
size_t m_mipchain_size { 0 };
Vector<size_t, 16> m_mipmap_offsets;
Vector<Vector3<unsigned>, 16> m_mipmap_sizes;
Vector<u8> m_data;
};
}