1 files changed, 126 insertions, 0 deletions
diff --git a/src/Runtime/Source/runtimerender/Qt3DSRenderTextTextureAtlas.cpp b/src/Runtime/Source/runtimerender/Qt3DSRenderTextTextureAtlas.cpp
new file mode 100644
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+++ b/src/Runtime/Source/runtimerender/Qt3DSRenderTextTextureAtlas.cpp
@@ -0,0 +1,126 @@
+/****************************************************************************
+**
+** 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);
+}