dolphin/Source/Core/VideoCommon/AbstractTexture.cpp

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// Copyright 2017 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <algorithm>
#include "Common/Assert.h"
#include "Common/MsgHandler.h"
#include "VideoCommon/AbstractStagingTexture.h"
#include "VideoCommon/AbstractTexture.h"
#include "VideoCommon/ImageWrite.h"
#include "VideoCommon/RenderBase.h"
AbstractTexture::AbstractTexture(const TextureConfig& c) : m_config(c)
{
}
AbstractTexture::~AbstractTexture() = default;
bool AbstractTexture::Save(const std::string& filename, unsigned int level)
{
// We can't dump compressed textures currently (it would mean drawing them to a RGBA8
// framebuffer, and saving that). TextureCache does not call Save for custom textures
// anyway, so this is fine for now.
_assert_(!IsCompressedFormat(m_config.format));
_assert_(level < m_config.levels);
// Determine dimensions of image we want to save.
u32 level_width = std::max(1u, m_config.width >> level);
u32 level_height = std::max(1u, m_config.height >> level);
// Use a temporary staging texture for the download. Certainly not optimal,
// but this is not a frequently-executed code path..
TextureConfig readback_texture_config(level_width, level_height, 1, 1,
AbstractTextureFormat::RGBA8, false);
auto readback_texture =
g_renderer->CreateStagingTexture(StagingTextureType::Readback, readback_texture_config);
if (!readback_texture)
return false;
// Copy to the readback texture's buffer.
readback_texture->CopyFromTexture(this, 0, level);
readback_texture->Flush();
// Map it so we can encode it to the file.
if (!readback_texture->Map())
return false;
return TextureToPng(reinterpret_cast<const u8*>(readback_texture->GetMappedPointer()),
static_cast<int>(readback_texture->GetMappedStride()), filename, level_width,
level_height);
}
bool AbstractTexture::IsCompressedFormat(AbstractTextureFormat format)
{
switch (format)
{
case AbstractTextureFormat::DXT1:
case AbstractTextureFormat::DXT3:
case AbstractTextureFormat::DXT5:
case AbstractTextureFormat::BPTC:
return true;
default:
return false;
}
}
size_t AbstractTexture::CalculateStrideForFormat(AbstractTextureFormat format, u32 row_length)
{
switch (format)
{
case AbstractTextureFormat::DXT1:
return static_cast<size_t>(std::max(1u, row_length / 4)) * 8;
case AbstractTextureFormat::DXT3:
case AbstractTextureFormat::DXT5:
case AbstractTextureFormat::BPTC:
return static_cast<size_t>(std::max(1u, row_length / 4)) * 16;
case AbstractTextureFormat::RGBA8:
case AbstractTextureFormat::BGRA8:
return static_cast<size_t>(row_length) * 4;
default:
PanicAlert("Unhandled texture format.");
return 0;
}
}
size_t AbstractTexture::GetTexelSizeForFormat(AbstractTextureFormat format)
{
switch (format)
{
case AbstractTextureFormat::DXT1:
return 8;
case AbstractTextureFormat::DXT3:
case AbstractTextureFormat::DXT5:
case AbstractTextureFormat::BPTC:
return 16;
case AbstractTextureFormat::RGBA8:
case AbstractTextureFormat::BGRA8:
return 4;
default:
PanicAlert("Unhandled texture format.");
return 0;
}
}
const TextureConfig& AbstractTexture::GetConfig() const
{
return m_config;
}