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LibSoftGPU: Add methods to read and write image data

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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.
This commit is contained in:
Stephan Unverwerth 2021-12-22 18:07:01 +01:00 • committed by Brian Gianforcaro
parent 2a72d14336
commit b41ad28654
3 changed files with 62 additions and 0 deletions
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38
Userland/Libraries/LibSoftGPU/Image.cpp
View file

@ -41,4 +41,42 @@ Image::Image(ImageFormat format, unsigned width, unsigned height, unsigned depth
m_data.resize(m_mipchain_size * m_num_layers); m_data.resize(m_mipchain_size * m_num_layers);
} }
void Image::write_texels(unsigned layer, unsigned level, Vector3<unsigned> const& offset, Vector3<unsigned> const& size, void const* data, ImageDataLayout const& layout)
{
VERIFY(layer < num_layers());
VERIFY(level < num_levels());
VERIFY(offset.x() + size.x() <= level_width(level));
VERIFY(offset.y() + size.y() <= level_height(level));
VERIFY(offset.z() + size.z() <= level_depth(level));
for (unsigned z = 0; z < size.z(); ++z) {
for (unsigned y = 0; y < size.y(); ++y) {
for (unsigned x = 0; x < size.x(); ++x) {
auto ptr = reinterpret_cast<u8 const*>(data) + layout.depth_stride * z + layout.row_stride * y + layout.column_stride * x;
auto color = unpack_color(ptr, layout.format);
set_texel(layer, level, offset.x() + x, offset.y() + y, offset.z() + z, color);
}
}
}
}
void Image::read_texels(unsigned layer, unsigned level, Vector3<unsigned> const& offset, Vector3<unsigned> const& size, void* data, ImageDataLayout const& layout) const
{
VERIFY(layer < num_layers());
VERIFY(level < num_levels());
VERIFY(offset.x() + size.x() <= level_width(level));
VERIFY(offset.y() + size.y() <= level_height(level));
VERIFY(offset.z() + size.z() <= level_depth(level));
for (unsigned z = 0; z < size.z(); ++z) {
for (unsigned y = 0; y < size.y(); ++y) {
for (unsigned x = 0; x < size.x(); ++x) {
auto color = texel(layer, level, offset.x() + x, offset.y() + y, offset.z() + z);
auto ptr = reinterpret_cast<u8*>(data) + layout.depth_stride * z + layout.row_stride * y + layout.column_stride * x;
pack_color(color, ptr, layout.format);
}
}
}
}
} }

4
Userland/Libraries/LibSoftGPU/Image.h
View file

@ -10,6 +10,7 @@
#include <AK/Vector.h> #include <AK/Vector.h>
#include <LibGfx/Vector3.h> #include <LibGfx/Vector3.h>
#include <LibGfx/Vector4.h> #include <LibGfx/Vector4.h>
#include <LibSoftGPU/ImageDataLayout.h>
#include <LibSoftGPU/ImageFormat.h> #include <LibSoftGPU/ImageFormat.h>
namespace SoftGPU { namespace SoftGPU {
@ -38,6 +39,9 @@ public:
pack_color(color, texel_pointer(layer, level, x, y, z), m_format); pack_color(color, texel_pointer(layer, level, x, y, z), m_format);
} }
void write_texels(unsigned layer, unsigned level, Vector3<unsigned> const& offset, Vector3<unsigned> const& size, void const* data, ImageDataLayout const& layout);
void read_texels(unsigned layer, unsigned level, Vector3<unsigned> const& offset, Vector3<unsigned> const& size, void* data, ImageDataLayout const& layout) const;
private: private:
void const* texel_pointer(unsigned layer, unsigned level, unsigned x, unsigned y, unsigned z) const void const* texel_pointer(unsigned layer, unsigned level, unsigned x, unsigned y, unsigned z) const
{ {

20
Userland/Libraries/LibSoftGPU/ImageDataLayout.h Normal file
View file

@ -0,0 +1,20 @@
/*
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibSoftGPU/ImageFormat.h>
namespace SoftGPU {
struct ImageDataLayout final {
ImageFormat format;
size_t column_stride;
size_t row_stride;
size_t depth_stride;
};
}