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b41ad28654
This adds two methods, write_texels and read_texels, to the Image class. Conversion between image formats happens automatically. The layout of the client image data is passed in via ImageDataLayout struct.
82 lines
2.9 KiB
C++
82 lines
2.9 KiB
C++
/*
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* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibSoftGPU/Image.h>
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namespace SoftGPU {
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Image::Image(ImageFormat format, unsigned width, unsigned height, unsigned depth, unsigned levels, unsigned layers)
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: m_format(format)
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, m_width(width)
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, m_height(height)
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, m_depth(depth)
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, m_num_layers(layers)
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{
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VERIFY(width > 0);
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VERIFY(height > 0);
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VERIFY(depth > 0);
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VERIFY(levels > 0);
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VERIFY(layers > 0);
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m_mipmap_sizes.append({ width, height, depth });
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m_mipmap_offsets.append(0);
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m_mipchain_size += width * height * depth * element_size(format);
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while (--levels && (width > 1 || height > 1 || depth > 1)) {
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width = max(width / 2, 1);
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height = max(height / 2, 1);
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depth = max(depth / 2, 1);
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m_mipmap_sizes.append({ width, height, depth });
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m_mipmap_offsets.append(m_mipchain_size);
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m_mipchain_size += width * height * depth * element_size(format);
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}
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m_num_levels = m_mipmap_sizes.size();
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m_data.resize(m_mipchain_size * m_num_layers);
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}
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void Image::write_texels(unsigned layer, unsigned level, Vector3<unsigned> const& offset, Vector3<unsigned> const& size, void const* data, ImageDataLayout const& layout)
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{
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VERIFY(layer < num_layers());
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VERIFY(level < num_levels());
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VERIFY(offset.x() + size.x() <= level_width(level));
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VERIFY(offset.y() + size.y() <= level_height(level));
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VERIFY(offset.z() + size.z() <= level_depth(level));
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for (unsigned z = 0; z < size.z(); ++z) {
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for (unsigned y = 0; y < size.y(); ++y) {
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for (unsigned x = 0; x < size.x(); ++x) {
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auto ptr = reinterpret_cast<u8 const*>(data) + layout.depth_stride * z + layout.row_stride * y + layout.column_stride * x;
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auto color = unpack_color(ptr, layout.format);
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set_texel(layer, level, offset.x() + x, offset.y() + y, offset.z() + z, color);
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}
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}
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}
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}
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void Image::read_texels(unsigned layer, unsigned level, Vector3<unsigned> const& offset, Vector3<unsigned> const& size, void* data, ImageDataLayout const& layout) const
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{
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VERIFY(layer < num_layers());
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VERIFY(level < num_levels());
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VERIFY(offset.x() + size.x() <= level_width(level));
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VERIFY(offset.y() + size.y() <= level_height(level));
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VERIFY(offset.z() + size.z() <= level_depth(level));
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for (unsigned z = 0; z < size.z(); ++z) {
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for (unsigned y = 0; y < size.y(); ++y) {
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for (unsigned x = 0; x < size.x(); ++x) {
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auto color = texel(layer, level, offset.x() + x, offset.y() + y, offset.z() + z);
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auto ptr = reinterpret_cast<u8*>(data) + layout.depth_stride * z + layout.row_stride * y + layout.column_stride * x;
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pack_color(color, ptr, layout.format);
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}
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}
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}
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}
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}
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