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/****************************************************************************
**
** Copyright (C) 2008-2012 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "Qt3DSRenderTextTextureAtlas.h"
#include "Qt3DSTextRenderer.h"
#include "foundation/Qt3DSAtomic.h"
#include "foundation/Qt3DSFoundation.h"
#include "foundation/Qt3DSBroadcastingAllocator.h"
#include "render/Qt3DSRenderContext.h"
using namespace qt3ds::render;
namespace {
struct STextTextureAtlas : public ITextTextureAtlas
{
static const QT3DSI32 TEXTURE_ATLAS_DIM =
256; // if you change this you need to adjust Qt3DSOnscreenTextRenderer size as well
NVFoundationBase &m_Foundation;
volatile QT3DSI32 mRefCount;
NVScopedRefCounted<ITextRenderer> m_TextRenderer;
NVScopedRefCounted<NVRenderContext> m_RenderContext;
STextTextureAtlas(NVFoundationBase &inFnd, ITextRenderer &inRenderer,
NVRenderContext &inRenderContext)
: m_Foundation(inFnd)
, mRefCount(0)
, m_TextRenderer(inRenderer)
, m_RenderContext(inRenderContext)
, m_TextureAtlasInitialized(false)
, m_textureAtlas(NULL)
{
}
virtual ~STextTextureAtlas()
{
if (m_textureAtlas) {
m_textureAtlas->release();
}
}
QT3DS_IMPLEMENT_REF_COUNT_ADDREF_RELEASE_OVERRIDE(m_Foundation.getAllocator())
TTextRenderAtlasDetailsAndTexture RenderText(const STextRenderInfo &inText) override
{
SRenderTextureAtlasDetails theDetails = m_TextRenderer->RenderText(inText);
return TTextRenderAtlasDetailsAndTexture(theDetails, m_textureAtlas);
}
bool IsInitialized() override { return m_TextureAtlasInitialized && m_textureAtlas; }
TTextTextureAtlasDetailsAndTexture PrepareTextureAtlas() override
{
if (!m_TextureAtlasInitialized && !m_textureAtlas) {
// create the texture atlas entries
QT3DSI32 count = m_TextRenderer->CreateTextureAtlas();
m_textureAtlas = m_RenderContext->CreateTexture2D();
if (m_textureAtlas && count) {
m_TextureAtlasInitialized = true;
m_textureAtlas->addRef();
// if you change the size you need to adjust Qt3DSOnscreenTextRenderer too
if (m_RenderContext->GetRenderContextType() == NVRenderContextValues::GLES2) {
m_textureAtlas->SetTextureData(NVDataRef<QT3DSU8>(), 0, TEXTURE_ATLAS_DIM,
TEXTURE_ATLAS_DIM, NVRenderTextureFormats::RGBA8);
} else {
m_textureAtlas->SetTextureData(NVDataRef<QT3DSU8>(), 0, TEXTURE_ATLAS_DIM,
TEXTURE_ATLAS_DIM, NVRenderTextureFormats::Alpha8);
}
m_textureAtlas->SetMagFilter(qt3ds::render::NVRenderTextureMagnifyingOp::Linear);
m_textureAtlas->SetMinFilter(qt3ds::render::NVRenderTextureMinifyingOp::Linear);
m_textureAtlas->SetTextureWrapS(NVRenderTextureCoordOp::ClampToEdge);
m_textureAtlas->SetTextureWrapT(NVRenderTextureCoordOp::ClampToEdge);
qt3ds::render::STextureDetails texTexDetails = m_textureAtlas->GetTextureDetails();
return TTextTextureAtlasDetailsAndTexture(
STextTextureAtlasDetails(texTexDetails.m_Height, texTexDetails.m_Height, false,
count),
m_textureAtlas);
}
}
return TTextTextureAtlasDetailsAndTexture(STextTextureAtlasDetails(), NULL);
}
private:
bool m_TextureAtlasInitialized;
NVRenderTexture2D *m_textureAtlas; // this is the actual texture which has application lifetime
};
} // namespace
ITextTextureAtlas &ITextTextureAtlas::CreateTextureAtlas(NVFoundationBase &inFnd,
ITextRenderer &inTextRenderer,
NVRenderContext &inRenderContext)
{
return *QT3DS_NEW(inFnd.getAllocator(), STextTextureAtlas)(inFnd, inTextRenderer, inRenderContext);
}
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