libSDL2pp/SDL2pp/TextureLock.cc
Dmitry Marakasov 1118a9b166 Implement empty constructor for Texture::LockHandle
Useful if lock must be initialized after it was created
While here, deinitialize all fields of an object which was moved-from
2014-12-17 03:50:02 +03:00

77 lines
2.1 KiB
C++

/*
libSDL2pp - C++ wrapper for libSDL2
Copyright (C) 2013 Dmitry Marakasov <amdmi3@amdmi3.ru>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include <SDL2/SDL_render.h>
#include <SDL2pp/Exception.hh>
#include <SDL2pp/Rect.hh>
#include <SDL2pp/Texture.hh>
namespace SDL2pp {
Texture::LockHandle::LockHandle() : texture_(nullptr) {
}
Texture::LockHandle::LockHandle(Texture* texture, const Rect& rect) : texture_(texture) {
if (SDL_LockTexture(texture_->Get(), rect.Get(), &pixels_, &pitch_) != 0)
throw Exception("SDL_LockTexture failed");
}
Texture::LockHandle::LockHandle(Texture::LockHandle&& other) noexcept : texture_(other.texture_), pixels_(other.pixels_), pitch_(other.pitch_) {
other.texture_ = nullptr;
other.pixels_ = nullptr;
other.pitch_ = 0;
}
Texture::LockHandle& Texture::LockHandle::operator=(Texture::LockHandle&& other) noexcept {
if (&other == this)
return *this;
if (texture_ != nullptr)
SDL_UnlockTexture(texture_->Get());
texture_ = other.texture_;
pixels_ = other.pixels_;
pitch_ = other.pitch_;
other.texture_ = nullptr;
other.pixels_ = nullptr;
other.pitch_ = 0;
return *this;
}
Texture::LockHandle::~LockHandle() {
if (texture_ != nullptr)
SDL_UnlockTexture(texture_->Get());
}
void* Texture::LockHandle::GetPixels() const {
return pixels_;
}
int Texture::LockHandle::GetPitch() const {
return pitch_;
}
}