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Diffstat (limited to 'src/render/Examples/Qt3DSRenderRenderToTextureExample.cpp')
| -rw-r--r-- | src/render/Examples/Qt3DSRenderRenderToTextureExample.cpp | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/render/Examples/Qt3DSRenderRenderToTextureExample.cpp b/src/render/Examples/Qt3DSRenderRenderToTextureExample.cpp new file mode 100644 index 0000000..e2cb414 --- /dev/null +++ b/src/render/Examples/Qt3DSRenderRenderToTextureExample.cpp @@ -0,0 +1,178 @@ +/**************************************************************************** +** +** 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 "Qt3DSRenderExample.h" +#include "Qt3DSRenderExampleTools.h" +#include "render/Qt3DSRenderFrameBuffer.h" +#include "render/Qt3DSRenderTexture2D.h" +#include "render/Qt3DSRenderIndexBuffer.h" +#include "render/Qt3DSRenderVertexBuffer.h" +#include "render/Qt3DSRenderFrameBuffer.h" +#include "render/Qt3DSRenderRenderBuffer.h" +#include "foundation/Qt3DSVec4.h" + +using namespace qt3ds; +using namespace qt3ds::render; + +namespace { +struct ShaderArgs +{ + float mvp[16]; + NVRenderTexture2DPtr texture; + NVRenderVertFragShaderPtr shader; + ShaderArgs() {} +}; +class RenderToTexture : public NVRenderExample +{ + NVRenderContext &m_Context; + NVScopedRefCounted<NVRenderVertexBuffer> mVertexBuffer; + NVScopedRefCounted<NVRenderIndexBuffer> mIndexBuffer; + // Simple shader + NVScopedRefCounted<NVRenderVertFragShader> mSimpleShader; + // Simple shader with texture lookup. + NVScopedRefCounted<NVRenderVertFragShader> mSimpleShaderTex; + + NVScopedRefCounted<NVRenderFrameBuffer> mFrameBuffer; + NVScopedRefCounted<NVRenderTexture2D> mColorBuffer; + NVScopedRefCounted<NVRenderTexture2D> mDepthBuffer; + + NVRenderHandle mGroupId; + QT3DSU32 mFBWidth; + QT3DSU32 mFBHeight; + + ShaderArgs mShaderArgs; + float frus[16]; + float model[16]; + float rot[9]; + +public: + RenderToTexture(NVRenderContext &context) + : m_Context(context) + , mFBWidth(400) + , mFBHeight(400) + { + NVRenderExampleTools::createBox(m_Context, mVertexBuffer.mPtr, mIndexBuffer.mPtr); + mVertexBuffer->addRef(); + mIndexBuffer->addRef(); + mSimpleShader = NVRenderExampleTools::createSimpleShader(m_Context); + mSimpleShaderTex = NVRenderExampleTools::createSimpleShaderTex(m_Context); + // If you don't want the depth buffer information back out of the system, then you can + // do this. + // mDepthBuffer = m_Context.CreateRenderBuffer( NVRenderRenderBufferFormats::Depth16, + // mFBWidth, mFBHeight ); + + mDepthBuffer = m_Context.CreateTexture2D(); + mDepthBuffer->SetTextureData(NVDataRef<QT3DSU8>(), 0, mFBWidth, mFBHeight, + NVRenderTextureFormats::Depth16); + mColorBuffer = m_Context.CreateTexture2D(); + mColorBuffer->SetTextureData(NVDataRef<QT3DSU8>(), 0, mFBWidth, mFBHeight, + NVRenderTextureFormats::RGBA8); + if (mDepthBuffer.mPtr && mColorBuffer.mPtr) { + // Creating objects tends to Bind them to their active state hooks. + // So to protect the rest of the system against what they are doing (if we care), we + // need + // to push the current state + // Auto-binds the framebuffer. + mFrameBuffer = m_Context.CreateFrameBuffer(); + mFrameBuffer->Attach(NVRenderFrameBufferAttachments::Color0, *mColorBuffer.mPtr); + mFrameBuffer->Attach(NVRenderFrameBufferAttachments::Depth, *mDepthBuffer.mPtr); + QT3DS_ASSERT(mFrameBuffer->IsComplete()); + + m_Context.SetRenderTarget(NULL); + } + mColorBuffer->SetMinFilter(NVRenderTextureMinifyingOp::Linear); + mColorBuffer->SetMagFilter(NVRenderTextureMagnifyingOp::Linear); + m_Context.SetVertexBuffer(mVertexBuffer); + m_Context.SetIndexBuffer(mIndexBuffer); + m_Context.SetDepthTestEnabled(true); + m_Context.SetDepthWriteEnabled(true); + m_Context.SetClearColor(QT3DSVec4(.3f)); + // Setup various matrici + NvGl2DemoMatrixIdentity(model); + NvGl2DemoMatrixIdentity(frus); + NvGl2DemoMatrixFrustum(frus, -1, 1, -1, 1, 1, 10); + NvGl2DemoMatrixTranslate(model, 0, 0, -4); + mShaderArgs.texture = mColorBuffer.mPtr; + } + void setupMVP(QT3DSVec3 translation) + { + float *mvp(mShaderArgs.mvp); + memCopy(mvp, frus, 16 * sizeof(float)); + NvGl2DemoMatrixMultiply(mvp, model); + NvGl2DemoMatrixTranslate(mvp, translation.x, translation.y, translation.z); + NvGl2DemoMatrixMultiply_4x4_3x3(mvp, rot); + } + void DrawIndexedArrays(QT3DSVec3 translation) + { + setupMVP(translation); + m_Context.SetActiveShader(mShaderArgs.shader); + mShaderArgs.shader->Bind(); + mShaderArgs.shader->SetPropertyValue("mat_mvp", + *reinterpret_cast<QT3DSMat44 *>(mShaderArgs.mvp)); + mShaderArgs.shader->SetPropertyValue("image0", mShaderArgs.texture); + m_Context.Draw(NVRenderDrawMode::Triangles, mIndexBuffer->GetNumIndices(), 0); + } + + virtual void drawFrame(double currentSeconds) + { + NvGl2DemoMatrixRotate_create3x3(rot, (float)currentSeconds * 50, .707f, .707f, 0); + NVRenderClearFlags clearFlags(NVRenderClearValues::Color | NVRenderClearValues::Depth); + // render to frame buffer + { + NVRenderContextScopedProperty<NVRenderFrameBufferPtr> __framebuffer( + m_Context, &NVRenderContext::GetRenderTarget, &NVRenderContext::SetRenderTarget, + mFrameBuffer); + NVRenderContextScopedProperty<NVRenderRect> __viewport( + m_Context, &NVRenderContext::GetViewport, &NVRenderContext::SetViewport, + NVRenderRect(0, 0, mFBWidth, mFBHeight)); + NVRenderContextScopedProperty<QT3DSVec4> __clearColor( + m_Context, &NVRenderContext::GetClearColor, &NVRenderContext::SetClearColor, + QT3DSVec4(.6f)); + m_Context.Clear(clearFlags); + mShaderArgs.shader = mSimpleShader; + DrawIndexedArrays(QT3DSVec3(0.f)); + } + m_Context.Clear(clearFlags); + mShaderArgs.texture = mColorBuffer; + mShaderArgs.shader = mSimpleShaderTex; + + DrawIndexedArrays(QT3DSVec3(-2.f, 0.f, 0.f)); + + mShaderArgs.texture = mDepthBuffer; + DrawIndexedArrays(QT3DSVec3(2.f, 0.f, 0.f)); + } + virtual QT3DSU32 getRuntimeInSeconds() + { + return mSimpleShader.mPtr && mSimpleShaderTex.mPtr ? 5 : 0; + } + virtual void release() { NVDelete(m_Context.GetFoundation(), this); } +}; +} + +QT3DS_RENDER_REGISTER_EXAMPLE(RenderToTexture);
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