1 files changed, 87 insertions, 0 deletions
diff --git a/src/Runtime/Source/runtimerender/Qt3DSTextRenderer.cpp b/src/Runtime/Source/runtimerender/Qt3DSTextRenderer.cpp
new file mode 100644
index 00000000..91a5eb78
--- /dev/null
+++ b/src/Runtime/Source/runtimerender/Qt3DSTextRenderer.cpp
@@ -0,0 +1,87 @@
+/****************************************************************************
+**
+** 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 "Qt3DSTextRenderer.h"
+#include "render/Qt3DSRenderTexture2D.h"
+
+using namespace qt3ds::render;
+
+// http://acius2.blogspot.com/2007/11/calculating-next-power-of-2.html
+QT3DSU32 ITextRenderer::NextPowerOf2(QT3DSU32 input)
+{
+    // Algorithm doesn't work for 0 or QT3DS_MAX_U32
+    QT3DS_ASSERT(input > 0 && input < QT3DS_MAX_U32);
+    input--;
+    input = (input >> 1) | input;
+    input = (input >> 2) | input;
+    input = (input >> 4) | input;
+    input = (input >> 8) | input;
+    input = (input >> 16) | input;
+    input++; // input is now the next highest power of 2.
+    return input;
+}
+
+QT3DSU32 ITextRenderer::NextMultipleOf4(QT3DSU32 inValue)
+{
+    QT3DSU32 remainder(inValue % 4);
+    if (remainder != 0)
+        inValue = inValue + (4 - remainder);
+
+    return inValue;
+}
+
+STextTextureDetails ITextRenderer::UploadData(NVDataRef<QT3DSU8> inTextureData,
+                                              NVRenderTexture2D &inTexture, QT3DSU32 inDataWidth,
+                                              QT3DSU32 inDataHeight, QT3DSU32 inTextWidth,
+                                              QT3DSU32 inTextHeight,
+                                              NVRenderTextureFormats::Enum inFormat,
+                                              bool inFlipYAxis)
+{
+    if (inTextWidth == 0 || inTextHeight == 0) {
+        QT3DSU32 black[] = { 0, 0, 0, 0 };
+        inTexture.SetTextureData(toU8DataRef(black, 4), 0, 2, 2, NVRenderTextureFormats::RGBA8);
+        return STextTextureDetails(2, 2, false, QT3DSVec2(1.0));
+    }
+    QT3DS_ASSERT(NextMultipleOf4(inDataWidth) == inDataWidth);
+    QT3DSU32 theNecessaryHeight = NextMultipleOf4(inTextHeight);
+    QT3DSU32 dataStride = inDataWidth * NVRenderTextureFormats::getSizeofFormat(inFormat);
+    if (inTextureData.size() < dataStride * inDataHeight) {
+        QT3DS_ASSERT(false);
+        return STextTextureDetails();
+    }
+
+    STextureDetails theTextureDetails = inTexture.GetTextureDetails();
+    QT3DSU32 theUploadSize = theNecessaryHeight * dataStride;
+
+    NVDataRef<QT3DSU8> theUploadData = NVDataRef<QT3DSU8>(inTextureData.begin(), theUploadSize);
+    inTexture.SetTextureData(theUploadData, 0, inDataWidth, theNecessaryHeight, inFormat);
+    inTexture.SetMagFilter(qt3ds::render::NVRenderTextureMagnifyingOp::Linear);
+    inTexture.SetMinFilter(qt3ds::render::NVRenderTextureMinifyingOp::Linear);
+    return STextTextureDetails(inTextWidth, inTextHeight, inFlipYAxis, QT3DSVec2(1.0f, 1.0f));
+}