// Returns one of the layout's rectangles.
TextureLayoutRectangle& TextureLayout::GetRectangle(int index)
{
ROCKET_ASSERT(index >= 0);
ROCKET_ASSERT(index < GetNumRectangles());
return rectangles[index];
}
void TextureLayout::WriteCacheFile(FILE* f)
{
int sr = GetNumRectangles();
fwrite(&sr, sizeof(sr), 1, f);
for (int i = 0; i < sr; ++i)
{
auto& rect = GetRectangle(i);
TextureLayoutRectangleCache rectc;
rectc.dimensions_x = rect.GetDimensions().x;
rectc.dimensions_y = rect.GetDimensions().y;
rectc.id = rect.GetId();
rectc.texture_index = rect.GetTextureIndex();
rectc.texture_position_x = rect.GetPosition().x;
rectc.texture_position_y = rect.GetPosition().y;
rectc.texture_stride = rect.GetTextureStride();
fwrite(&rectc, sizeof(TextureLayoutRectangleCache), 1, f);
}
int sl = GetNumTextures();
fwrite(&sl, sizeof(sl), 1, f);
for (int i = 0; i < sl; ++i)
{
GetTexture(i).WriteCacheFile(f, &rectangles[0]);
}
}
// 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;
}
