dolphin/Source/Core/VideoBackends/Software/SWTexture.cpp

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// Copyright 2017 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "VideoBackends/Software/SWTexture.h"
#include <cstring>
#include "Common/Assert.h"
#include "VideoBackends/Software/CopyRegion.h"
namespace SW
{
namespace
{
#pragma pack(push, 1)
struct Pixel
{
u8 r;
u8 g;
u8 b;
u8 a;
};
#pragma pack(pop)
void CopyTextureData(const TextureConfig& src_config, const u8* src_ptr, u32 src_x, u32 src_y,
u32 width, u32 height, const TextureConfig& dst_config, u8* dst_ptr, u32 dst_x,
u32 dst_y)
{
size_t texel_size = AbstractTexture::GetTexelSizeForFormat(src_config.format);
size_t src_stride = src_config.GetStride();
size_t src_offset =
static_cast<size_t>(src_y) * src_stride + static_cast<size_t>(src_x) * texel_size;
size_t dst_stride = dst_config.GetStride();
size_t dst_offset =
static_cast<size_t>(dst_y) * dst_stride + static_cast<size_t>(dst_x) * texel_size;
size_t copy_len = static_cast<size_t>(width) * texel_size;
src_ptr += src_offset;
dst_ptr += dst_offset;
for (u32 i = 0; i < height; i++)
{
std::memcpy(dst_ptr, src_ptr, copy_len);
src_ptr += src_stride;
dst_ptr += dst_stride;
}
}
}
SWTexture::SWTexture(const TextureConfig& tex_config) : AbstractTexture(tex_config)
{
m_data.resize(tex_config.width * tex_config.height * 4);
}
void SWTexture::CopyRectangleFromTexture(const AbstractTexture* src,
const MathUtil::Rectangle<int>& src_rect, u32 src_layer,
u32 src_level, const MathUtil::Rectangle<int>& dst_rect,
u32 dst_layer, u32 dst_level)
{
_assert_(src_level == 0 && src_layer == 0 && dst_layer == 0 && dst_level == 0);
CopyTextureData(src->GetConfig(), static_cast<const SWTexture*>(src)->m_data.data(),
src_rect.left, src_rect.top, src_rect.GetWidth(), src_rect.GetHeight(), m_config,
m_data.data(), dst_rect.left, dst_rect.top);
}
void SWTexture::ScaleRectangleFromTexture(const AbstractTexture* source,
const MathUtil::Rectangle<int>& srcrect,
const MathUtil::Rectangle<int>& dstrect)
{
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const SWTexture* software_source_texture = static_cast<const SWTexture*>(source);
if (srcrect.GetWidth() == dstrect.GetWidth() && srcrect.GetHeight() == dstrect.GetHeight())
{
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m_data.assign(software_source_texture->GetData(),
software_source_texture->GetData() + m_data.size());
}
else
{
std::vector<Pixel> source_pixels;
source_pixels.resize(srcrect.GetHeight() * srcrect.GetWidth() * 4);
memcpy(source_pixels.data(), software_source_texture->GetData(), source_pixels.size());
std::vector<Pixel> destination_pixels;
destination_pixels.resize(dstrect.GetHeight() * dstrect.GetWidth() * 4);
CopyRegion(source_pixels.data(), srcrect, destination_pixels.data(), dstrect);
memcpy(GetData(), destination_pixels.data(), destination_pixels.size());
}
}
void SWTexture::Load(u32 level, u32 width, u32 height, u32 row_length, const u8* buffer,
size_t buffer_size)
{
m_data.assign(buffer, buffer + buffer_size);
}
const u8* SWTexture::GetData() const
{
return m_data.data();
}
u8* SWTexture::GetData()
{
return m_data.data();
}
SWStagingTexture::SWStagingTexture(StagingTextureType type, const TextureConfig& config)
: AbstractStagingTexture(type, config)
{
m_data.resize(m_texel_size * config.width * config.height);
m_map_pointer = reinterpret_cast<char*>(m_data.data());
m_map_stride = m_texel_size * config.width;
}
SWStagingTexture::~SWStagingTexture() = default;
void SWStagingTexture::CopyFromTexture(const AbstractTexture* src,
const MathUtil::Rectangle<int>& src_rect, u32 src_layer,
u32 src_level, const MathUtil::Rectangle<int>& dst_rect)
{
_assert_(src_level == 0 && src_layer == 0);
CopyTextureData(src->GetConfig(), static_cast<const SWTexture*>(src)->GetData(), src_rect.left,
src_rect.top, src_rect.GetWidth(), src_rect.GetHeight(), m_config, m_data.data(),
dst_rect.left, dst_rect.top);
m_needs_flush = true;
}
void SWStagingTexture::CopyToTexture(const MathUtil::Rectangle<int>& src_rect, AbstractTexture* dst,
const MathUtil::Rectangle<int>& dst_rect, u32 dst_layer,
u32 dst_level)
{
_assert_(dst_level == 0 && dst_layer == 0);
CopyTextureData(m_config, m_data.data(), src_rect.left, src_rect.top, src_rect.GetWidth(),
src_rect.GetHeight(), dst->GetConfig(), static_cast<SWTexture*>(dst)->GetData(),
dst_rect.left, dst_rect.top);
m_needs_flush = true;
}
bool SWStagingTexture::Map()
{
return true;
}
void SWStagingTexture::Unmap()
{
}
void SWStagingTexture::Flush()
{
m_needs_flush = false;
}
} // namespace SW