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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 "../../Include/Rocket/Core/Geometry.h"
#include "../../Include/Rocket/Core.h"
#include "GeometryDatabase.h"
namespace Rocket {
namespace Core {
static bool read_texel_offset = false;
static Vector2f texel_offset;
Geometry::Geometry(Element* _host_element)
{
host_element = _host_element;
host_context = NULL;
GeometryDatabase::AddGeometry(this);
texture = NULL;
fixed_texcoords = false;
compile_attempted = false;
compiled_geometry = 0;
}
Geometry::Geometry(Context* _host_context)
{
host_element = NULL;
host_context = _host_context;
GeometryDatabase::AddGeometry(this);
texture = NULL;
fixed_texcoords = false;
compile_attempted = false;
compiled_geometry = 0;
}
Geometry::~Geometry()
{
GeometryDatabase::RemoveGeometry(this);
Release();
}
// Set the host element for this geometry; this should be passed in the constructor if possible.
void Geometry::SetHostElement(Element* _host_element)
{
if (host_element == _host_element)
return;
if (host_element != NULL)
{
Release();
host_context = NULL;
}
host_element = _host_element;
}
void Geometry::Render(const Vector2f& translation)
{
RenderInterface* render_interface = GetRenderInterface();
if (render_interface == NULL)
return;
// Render our compiled geometry if possible.
if (compiled_geometry)
{
render_interface->RenderCompiledGeometry(compiled_geometry, translation);
}
// Otherwise, if we actually have geometry, try to compile it if we haven't already done so, otherwise render it in
// immediate mode.
else
{
if (vertices.empty() ||
indices.empty())
return;
if (!compile_attempted)
{
if (!fixed_texcoords)
{
fixed_texcoords = true;
if (!read_texel_offset)
{
read_texel_offset = true;
texel_offset.x = render_interface->GetHorizontalTexelOffset();
texel_offset.y = render_interface->GetVerticalTexelOffset();
}
// Add a half-texel offset if required.
if (texel_offset.x != 0 ||
texel_offset.y != 0)
{
for (size_t i = 0; i < vertices.size(); ++i)
vertices[i].position += texel_offset;
}
}
compile_attempted = true;
compiled_geometry = render_interface->CompileGeometry(&vertices[0], (int) vertices.size(), &indices[0], (int) indices.size(), texture != NULL ? texture->GetHandle(GetRenderInterface()) : 0);
// If we managed to compile the geometry, we can clear the local copy of vertices and indices and
// immediately render the compiled version.
if (compiled_geometry)
{
render_interface->RenderCompiledGeometry(compiled_geometry, translation);
return;
}
}
// Either we've attempted to compile before (and failed), or the compile we just attempted failed; either way,
// render the uncompiled version.
render_interface->RenderGeometry(&vertices[0], (int) vertices.size(), &indices[0], (int) indices.size(), texture != NULL ? texture->GetHandle(GetRenderInterface()) : 0, translation);
}
}
// Returns the geometry's vertices. If these are written to, Release() should be called to force a recompile.
std::vector< Vertex >& Geometry::GetVertices()
{
return vertices;
}
// Returns the geometry's indices. If these are written to, Release() should be called to force a recompile.
std::vector< int >& Geometry::GetIndices()
{
return indices;
}
// Gets the geometry's texture.
const Texture* Geometry::GetTexture() const
{
return texture;
}
// Sets the geometry's texture.
void Geometry::SetTexture(const Texture* _texture)
{
texture = _texture;
Release();
}
void Geometry::Release(bool clear_buffers)
{
if (compiled_geometry)
{
GetRenderInterface()->ReleaseCompiledGeometry(compiled_geometry);
compiled_geometry = 0;
}
compile_attempted = false;
if (clear_buffers)
{
vertices.clear();
indices.clear();
fixed_texcoords = false;
}
}
// Returns the host context's render interface.
RenderInterface* Geometry::GetRenderInterface()
{
if (host_context == NULL)
{
if (host_element != NULL)
host_context = host_element->GetContext();
}
if (host_context == NULL)
return Rocket::Core::GetRenderInterface();
else
return host_context->GetRenderInterface();
}
}
}
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