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/*
* This source file is part of libRocket, the HTML/CSS Interface Middleware
*
* For the latest information, see http://www.librocket.com
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#include "precompiled.h"
#include "TextureLayout.h"
#include <algorithm>
#include "TextureLayoutRectangle.h"
#include "TextureLayoutTexture.h"
namespace Rocket {
namespace Core {
struct RectangleSort
{
bool operator()(const TextureLayoutRectangle& lhs, const TextureLayoutRectangle& rhs) const
{
return lhs.GetDimensions().y > rhs.GetDimensions().y;
}
};
TextureLayout::TextureLayout()
{
}
TextureLayout::~TextureLayout()
{
}
// Adds a rectangle to the list of rectangles to be laid out.
void TextureLayout::AddRectangle(int id, const Vector2i& dimensions)
{
rectangles.push_back(TextureLayoutRectangle(id, dimensions));
}
// Returns one of the layout's rectangles.
TextureLayoutRectangle& TextureLayout::GetRectangle(int index)
{
ROCKET_ASSERT(index >= 0);
ROCKET_ASSERT(index < GetNumRectangles());
return rectangles[index];
}
// Returns the number of rectangles in the layout.
int TextureLayout::GetNumRectangles() const
{
return (int) rectangles.size();
}
// Returns one of the layout's textures.
TextureLayoutTexture& TextureLayout::GetTexture(int index)
{
ROCKET_ASSERT(index >= 0);
ROCKET_ASSERT(index < GetNumTextures());
return textures[index];
}
// Returns the number of textures in the layout.
int TextureLayout::GetNumTextures() const
{
return (int) textures.size();
}
// Attempts to generate an efficient texture layout for the rectangles.
bool TextureLayout::GenerateLayout(int max_texture_dimensions)
{
// Sort the rectangles by height.
std::sort(rectangles.begin(), rectangles.end(), RectangleSort());
int num_placed_rectangles = 0;
while (num_placed_rectangles != GetNumRectangles())
{
TextureLayoutTexture texture;
int texture_size = texture.Generate(*this, max_texture_dimensions);
if (texture_size == 0)
return false;
textures.push_back(texture);
num_placed_rectangles += texture_size;
}
return true;
}
}
}
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