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/* Copyright (C) 2021 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "MouseEventMask.h"
#include "gui/CGUISetting.h"
#include "lib/tex/tex.h"
#include "maths/Rect.h"
#include "maths/Vector2D.h"
#include "ps/Filesystem.h"
#include "ps/CacheLoader.h"
#include "ps/CLogger.h"
#include "ps/CStr.h"
#include "scriptinterface/ScriptConversions.h"
class IGUIObject;
class IGUISetting;
namespace
{
const std::string MOUSE_EVENT_MASK = "mouse_event_mask";
}
class CGUIMouseEventMask::Impl
{
public:
virtual ~Impl() = default;
virtual bool IsMouseOver(const CVector2D& mousePos, const CRect& objectSize) const = 0;
};
CGUIMouseEventMask::CGUIMouseEventMask(IGUIObject* owner) : IGUISetting(MOUSE_EVENT_MASK, owner)
{
}
CGUIMouseEventMask::~CGUIMouseEventMask()
{
}
void CGUIMouseEventMask::ToJSVal(const ScriptRequest& rq, JS::MutableHandleValue Value)
{
Script::ToJSVal(rq, Value, m_Spec);
}
bool CGUIMouseEventMask::DoFromJSVal(const ScriptRequest& rq, JS::HandleValue value)
{
CStrW spec;
if (!Script::FromJSVal(rq, value, spec))
return false;
return DoFromString(spec);
}
CStr CGUIMouseEventMask::GetName() const
{
return MOUSE_EVENT_MASK;
}
bool CGUIMouseEventMask::IsMouseOver(const CVector2D& mousePos, const CRect& objectSize) const
{
if (m_Impl)
return m_Impl->IsMouseOver(mousePos, objectSize);
return false;
}
class CGUIMouseEventMaskTexture final : public CGUIMouseEventMask::Impl
{
public:
static constexpr std::string_view identifier = "texture:";
static constexpr size_t specOffset = identifier.size();
static std::unique_ptr<CGUIMouseEventMaskTexture> Create(const std::string& spec)
{
std::shared_ptr<u8> shapeFile;
CCacheLoader loader(g_VFS, L".dds");
VfsPath sourcePath = VfsPath("art") / L"textures" / L"ui" / spec.substr(specOffset);
VfsPath archivePath = loader.ArchiveCachePath(sourcePath);
Status status;
size_t size;
if (loader.CanUseArchiveCache(sourcePath, archivePath))
status = g_VFS->LoadFile(archivePath, shapeFile, size);
else
status = g_VFS->LoadFile(sourcePath, shapeFile, size);
if (status != INFO::OK)
{
LOGWARNING("Mouse event mask texture not found ('%s')", spec);
return nullptr;
}
Tex tex;
if (tex.decode(shapeFile, size) != INFO::OK)
{
LOGERROR("Could not decode mouse event mask texture '%s'", spec);
return nullptr;
}
if (tex.transform(TEX_DXT | TEX_MIPMAPS) != INFO::OK)
{
LOGERROR("Could not transform texture '%s'", spec);
return nullptr;
}
// TODO > would be nice to downscale, maybe.
if (tex.m_Width == 0 || tex.m_Height == 0)
{
LOGERROR("Mouse event mask texture must have a non-null size ('%s')", spec);
return nullptr;
}
auto mask = std::make_unique<CGUIMouseEventMaskTexture>();
mask->m_Width = static_cast<u16>(tex.m_Width);
mask->m_Height = static_cast<u16>(tex.m_Height);
mask->m_Data.reserve(mask->m_Width * mask->m_Height);
for (u8* ptr = tex.get_data(); ptr < tex.get_data() + tex.m_DataSize; ptr += tex.m_Bpp/8)
{
if (tex.m_Bpp == 32)
mask->m_Data.push_back(*(ptr + 3) > 0);
else
mask->m_Data.push_back(*ptr > 0);
}
return mask;
}
virtual bool IsMouseOver(const CVector2D& mousePos, const CRect& objectSize) const override
{
if (m_Data.empty())
return false;
CVector2D delta = mousePos - objectSize.TopLeft();
int x = floor(delta.X * m_Width / objectSize.GetWidth());
int y = floor(delta.Y * m_Height / objectSize.GetHeight());
if (x < 0 || y < 0 || x >= m_Width || y >= m_Height)
return false;
return m_Data[x + y * m_Width];
}
private:
// This uses the bool specialization on purpose for the 'compression' effect.
std::vector<bool> m_Data;
u16 m_Width;
u16 m_Height;
};
bool CGUIMouseEventMask::DoFromString(const CStrW& Value)
{
std::string spec = Value.ToUTF8();
if (spec == m_Spec)
return true;
// Empty spec - reset the mask and return.
if (spec.empty())
{
m_Impl.reset();
return true;
}
if (spec.find(CGUIMouseEventMaskTexture::identifier) != std::string::npos)
{
std::unique_ptr<CGUIMouseEventMask::Impl> newImpl = CGUIMouseEventMaskTexture::Create(spec);
if (newImpl)
{
m_Impl = std::move(newImpl);
m_Spec = spec;
return true;
}
else
LOGERROR("Could not create shape for: %s", spec);
}
else
LOGWARNING("Unknown clickable shape: %s", spec);
return false;
}
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