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/*
* Copyright (c) 2020, Hüseyin ASLITÜRK <asliturk@hotmail.com>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/RefPtr.h>
#include <AK/StringView.h>
#include <AK/Types.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/PortableImageLoaderCommon.h>
namespace Gfx {
template<class TFormatDetails>
struct PortableImageMapLoadingContext {
using FormatDetails = TFormatDetails;
enum class Type {
Unknown,
ASCII,
RAWBITS
};
enum class State {
NotDecoded = 0,
Error,
MagicNumber,
Width,
Height,
Maxval,
Bitmap,
Decoded
};
Type type { Type::Unknown };
State state { State::NotDecoded };
u8 const* data { nullptr };
size_t data_size { 0 };
size_t width { 0 };
size_t height { 0 };
FormatDetails format_details {};
RefPtr<Gfx::Bitmap> bitmap;
};
template<typename TContext>
class PortableImageDecoderPlugin final : public ImageDecoderPlugin {
public:
PortableImageDecoderPlugin(u8 const*, size_t);
virtual ~PortableImageDecoderPlugin() override = default;
virtual IntSize size() override;
virtual void set_volatile() override;
[[nodiscard]] virtual bool set_nonvolatile(bool& was_purged) override;
virtual bool sniff() override;
virtual bool is_animated() override;
virtual size_t loop_count() override;
virtual size_t frame_count() override;
virtual ErrorOr<ImageFrameDescriptor> frame(size_t index) override;
private:
OwnPtr<TContext> m_context;
};
template<typename TContext>
PortableImageDecoderPlugin<TContext>::PortableImageDecoderPlugin(u8 const* data, size_t size)
{
m_context = make<TContext>();
m_context->data = data;
m_context->data_size = size;
}
template<typename TContext>
IntSize PortableImageDecoderPlugin<TContext>::size()
{
if (m_context->state == TContext::State::Error)
return {};
if (m_context->state < TContext::State::Decoded) {
bool success = decode(*m_context);
if (!success)
return {};
}
return { m_context->width, m_context->height };
}
template<typename TContext>
void PortableImageDecoderPlugin<TContext>::set_volatile()
{
if (m_context->bitmap)
m_context->bitmap->set_volatile();
}
template<typename TContext>
bool PortableImageDecoderPlugin<TContext>::set_nonvolatile(bool& was_purged)
{
if (!m_context->bitmap)
return false;
return m_context->bitmap->set_nonvolatile(was_purged);
}
template<typename TContext>
bool PortableImageDecoderPlugin<TContext>::sniff()
{
using Context = TContext;
if (m_context->data_size < 2)
return false;
if (m_context->data[0] == 'P' && m_context->data[1] == Context::FormatDetails::ascii_magic_number)
return true;
if (m_context->data[0] == 'P' && m_context->data[1] == Context::FormatDetails::binary_magic_number)
return true;
return false;
}
template<typename TContext>
bool PortableImageDecoderPlugin<TContext>::is_animated()
{
return false;
}
template<typename TContext>
size_t PortableImageDecoderPlugin<TContext>::loop_count()
{
return 0;
}
template<typename TContext>
size_t PortableImageDecoderPlugin<TContext>::frame_count()
{
return 1;
}
template<typename TContext>
ErrorOr<ImageFrameDescriptor> PortableImageDecoderPlugin<TContext>::frame(size_t index)
{
if (index > 0)
return Error::from_string_literal("PortableImageDecoderPlugin: Invalid frame index"sv);
if (m_context->state == TContext::State::Error)
return Error::from_string_literal("PortableImageDecoderPlugin: Decoding failed"sv);
if (m_context->state < TContext::State::Decoded) {
bool success = decode(*m_context);
if (!success)
return Error::from_string_literal("PortableImageDecoderPlugin: Decoding failed"sv);
}
VERIFY(m_context->bitmap);
return ImageFrameDescriptor { m_context->bitmap, 0 };
}
}
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