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/*
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
* Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/FixedArray.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <LibGPU/Enums.h>
#include <LibGPU/ImageDataLayout.h>
#include <LibGPU/ImageFormat.h>
#include <LibGfx/Vector3.h>
#include <LibGfx/Vector4.h>
#include <LibSoftGPU/Buffer/Typed3DBuffer.h>
#include <LibSoftGPU/Config.h>
namespace SoftGPU {
inline static FloatVector4 unpack_color(void const* ptr, GPU::ImageFormat format)
{
constexpr auto one_over_255 = 1.0f / 255;
switch (format) {
case GPU::ImageFormat::RGB888: {
auto rgb = reinterpret_cast<u8 const*>(ptr);
return {
rgb[0] * one_over_255,
rgb[1] * one_over_255,
rgb[2] * one_over_255,
1.0f,
};
}
case GPU::ImageFormat::BGR888: {
auto bgr = reinterpret_cast<u8 const*>(ptr);
return {
bgr[2] * one_over_255,
bgr[1] * one_over_255,
bgr[0] * one_over_255,
1.0f,
};
}
case GPU::ImageFormat::RGBA8888: {
auto rgba = *reinterpret_cast<u32 const*>(ptr);
return {
(rgba & 0xff) * one_over_255,
((rgba >> 8) & 0xff) * one_over_255,
((rgba >> 16) & 0xff) * one_over_255,
((rgba >> 24) & 0xff) * one_over_255,
};
}
case GPU::ImageFormat::BGRA8888: {
auto bgra = *reinterpret_cast<u32 const*>(ptr);
return {
((bgra >> 16) & 0xff) * one_over_255,
((bgra >> 8) & 0xff) * one_over_255,
(bgra & 0xff) * one_over_255,
((bgra >> 24) & 0xff) * one_over_255,
};
}
case GPU::ImageFormat::RGB565: {
auto rgb = *reinterpret_cast<u16 const*>(ptr);
return {
((rgb >> 11) & 0x1f) / 31.f,
((rgb >> 5) & 0x3f) / 63.f,
(rgb & 0x1f) / 31.f,
1.0f
};
}
case GPU::ImageFormat::L8: {
auto luminance = *reinterpret_cast<u8 const*>(ptr);
auto clamped_luminance = luminance * one_over_255;
return {
clamped_luminance,
clamped_luminance,
clamped_luminance,
1.0f,
};
}
case GPU::ImageFormat::L8A8: {
auto luminance_and_alpha = reinterpret_cast<u8 const*>(ptr);
auto clamped_luminance = luminance_and_alpha[0] * one_over_255;
return {
clamped_luminance,
clamped_luminance,
clamped_luminance,
luminance_and_alpha[1] * one_over_255,
};
}
default:
VERIFY_NOT_REACHED();
}
}
inline static void pack_color(FloatVector4 const& color, void* ptr, GPU::ImageFormat format)
{
auto r = static_cast<u8>(clamp(color.x(), 0.0f, 1.0f) * 255);
auto g = static_cast<u8>(clamp(color.y(), 0.0f, 1.0f) * 255);
auto b = static_cast<u8>(clamp(color.z(), 0.0f, 1.0f) * 255);
auto a = static_cast<u8>(clamp(color.w(), 0.0f, 1.0f) * 255);
switch (format) {
case GPU::ImageFormat::RGB888:
reinterpret_cast<u8*>(ptr)[0] = r;
reinterpret_cast<u8*>(ptr)[1] = g;
reinterpret_cast<u8*>(ptr)[2] = b;
return;
case GPU::ImageFormat::BGR888:
reinterpret_cast<u8*>(ptr)[2] = b;
reinterpret_cast<u8*>(ptr)[1] = g;
reinterpret_cast<u8*>(ptr)[0] = r;
return;
case GPU::ImageFormat::RGBA8888:
*reinterpret_cast<u32*>(ptr) = r | (g << 8) | (b << 16) | (a << 24);
return;
case GPU::ImageFormat::BGRA8888:
*reinterpret_cast<u32*>(ptr) = b | (g << 8) | (r << 16) | (a << 24);
return;
case GPU::ImageFormat::RGB565:
*reinterpret_cast<u16*>(ptr) = (r & 0x1f) | ((g & 0x3f) << 5) | ((b & 0x1f) << 11);
return;
case GPU::ImageFormat::L8:
*reinterpret_cast<u8*>(ptr) = r;
return;
case GPU::ImageFormat::L8A8:
reinterpret_cast<u8*>(ptr)[0] = r;
reinterpret_cast<u8*>(ptr)[1] = a;
return;
default:
VERIFY_NOT_REACHED();
}
}
class Image final : public RefCounted<Image> {
public:
Image(unsigned width, unsigned height, unsigned depth, unsigned max_levels, unsigned layers);
unsigned level_width(unsigned level) const { return m_mipmap_buffers[level]->width(); }
unsigned level_height(unsigned level) const { return m_mipmap_buffers[level]->height(); }
unsigned level_depth(unsigned level) const { return m_mipmap_buffers[level]->depth(); }
unsigned num_levels() const { return m_num_levels; }
unsigned num_layers() const { return m_num_layers; }
bool width_is_power_of_two() const { return m_width_is_power_of_two; }
bool height_is_power_of_two() const { return m_height_is_power_of_two; }
bool depth_is_power_of_two() const { return m_depth_is_power_of_two; }
FloatVector4 texel(unsigned layer, unsigned level, int x, int y, int z) const
{
return unpack_color(texel_pointer(layer, level, x, y, z), GPU::ImageFormat::BGRA8888);
}
void set_texel(unsigned layer, unsigned level, int x, int y, int z, FloatVector4 const& color)
{
pack_color(color, texel_pointer(layer, level, x, y, z), GPU::ImageFormat::BGRA8888);
}
void write_texels(unsigned layer, unsigned level, Vector3<unsigned> const& offset, Vector3<unsigned> const& size, void const* data, GPU::ImageDataLayout const& layout);
void read_texels(unsigned layer, unsigned level, Vector3<unsigned> const& offset, Vector3<unsigned> const& size, void* data, GPU::ImageDataLayout const& layout) const;
void copy_texels(Image const& source, unsigned source_layer, unsigned source_level, Vector3<unsigned> const& source_offset, Vector3<unsigned> const& size, unsigned destination_layer, unsigned destination_level, Vector3<unsigned> const& destination_offset);
private:
void const* texel_pointer(unsigned layer, unsigned level, int x, int y, int z) const
{
return m_mipmap_buffers[layer * m_num_layers + level]->buffer_pointer(x, y, z);
}
void* texel_pointer(unsigned layer, unsigned level, int x, int y, int z)
{
return m_mipmap_buffers[layer * m_num_layers + level]->buffer_pointer(x, y, z);
}
private:
unsigned m_num_levels { 0 };
unsigned m_num_layers { 0 };
FixedArray<RefPtr<Typed3DBuffer<GPU::ColorType>>> m_mipmap_buffers;
bool m_width_is_power_of_two { false };
bool m_height_is_power_of_two { false };
bool m_depth_is_power_of_two { false };
};
}
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