| /**************************************************************************** |
| ** |
| ** Copyright (C) 2019 Klaralvdalens Datakonsult AB (KDAB). |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt3D module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
| ** 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. |
| ** |
| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
| ** |
| ** "Redistribution and use in source and binary forms, with or without |
| ** modification, are permitted provided that the following conditions are |
| ** met: |
| ** * Redistributions of source code must retain the above copyright |
| ** notice, this list of conditions and the following disclaimer. |
| ** * Redistributions in binary form must reproduce the above copyright |
| ** notice, this list of conditions and the following disclaimer in |
| ** the documentation and/or other materials provided with the |
| ** distribution. |
| ** * Neither the name of The Qt Company Ltd nor the names of its |
| ** contributors may be used to endorse or promote products derived |
| ** from this software without specific prior written permission. |
| ** |
| ** |
| ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| import Qt3D.Core 2.14 |
| import Qt3D.Render 2.14 |
| import Qt3D.Input 2.0 |
| import Qt3D.Extras 2.0 |
| |
| Entity { |
| id: sceneRoot |
| |
| components: [ |
| RenderSettings { |
| id : external_forward_renderer |
| activeFrameGraph : RenderSurfaceSelector { |
| Viewport { |
| // Launch Compute Shader Instances |
| DispatchCompute { |
| } |
| |
| // Draw Textures |
| CameraSelector { |
| camera: camera |
| ClearBuffers { buffers: ClearBuffers.ColorDepthBuffer |
| // Ensure we won't be reading from textures if Compute Shader instances aren't completed |
| MemoryBarrier { waitFor: MemoryBarrier.ShaderImageAccess|MemoryBarrier.TextureFetch } |
| } |
| } |
| } |
| } |
| }, |
| // Event Source will be set by the Qt3DQuickWindow |
| InputSettings { id: inputSettings } |
| ] |
| |
| Camera { |
| id: camera |
| projectionType: CameraLens.PerspectiveProjection |
| fieldOfView: 45 |
| aspectRatio: 16/9 |
| nearPlane : 0.1 |
| farPlane : 1000.0 |
| position: Qt.vector3d( 0.0, 0.0, 3.0 ) |
| upVector: Qt.vector3d( 0.0, 1.0, 0.0 ) |
| viewCenter: Qt.vector3d( 0.0, 0.0, 0.0 ) |
| } |
| |
| Texture2D { |
| id: inputTexture |
| width: 512 |
| height: 512 |
| format: Texture.RGBA8_UNorm |
| generateMipMaps: false |
| magnificationFilter: Texture.Linear |
| minificationFilter: Texture.Linear |
| wrapMode { |
| x: WrapMode.ClampToEdge |
| y: WrapMode.ClampToEdge |
| } |
| |
| // Texture image which are referencing regular image extensions (jpg, png) |
| // are loaded through a QImage based texture image generator which generates |
| // RGBA8_UNorm based content |
| TextureImage { |
| source: "qrc:/image_512x512.jpg" |
| mirrored: false |
| } |
| } |
| |
| Texture2D { |
| id: outputTexture |
| width: 512 |
| height: 512 |
| format: Texture.RGBA8_UNorm |
| generateMipMaps: false |
| magnificationFilter: Texture.Linear |
| minificationFilter: Texture.Linear |
| wrapMode { |
| x: WrapMode.ClampToEdge |
| y: WrapMode.ClampToEdge |
| } |
| } |
| |
| // Compute -> Generate Output Texture Content |
| Entity { |
| readonly property Material material: Material { |
| parameters: [ |
| Parameter { |
| name: "inputImage" |
| value: ShaderImage { |
| texture: inputTexture |
| layer: 0 // default |
| layered: false // default |
| mipLevel: 0 // default |
| access: ShaderImage.ReadOnly // default is ReadWrite |
| format: ShaderImage.Automatic // default |
| } |
| }, |
| Parameter { |
| name: "outputImage" |
| value: ShaderImage { |
| texture: outputTexture |
| access: ShaderImage.WriteOnly // default is ReadWrite |
| format: ShaderImage.RGBA8_UNorm |
| } |
| } |
| ] |
| |
| effect: Effect { |
| techniques: Technique { |
| graphicsApiFilter { |
| api: GraphicsApiFilter.OpenGL |
| profile: GraphicsApiFilter.CoreProfile |
| majorVersion: 4 |
| minorVersion: 3 |
| } |
| renderPasses: RenderPass { |
| shaderProgram: ShaderProgram { |
| computeShaderCode: |
| "#version 430 |
| |
| layout(local_size_x = 16, local_size_y = 16) in; |
| layout(rgba8) readonly uniform image2D inputImage; |
| layout(rgba8) writeonly uniform image2D outputImage; |
| uniform float time; |
| void main(void) { |
| ivec2 imageCoords = ivec2(gl_GlobalInvocationID.xy); |
| |
| // Early return if we are past the image's bounds |
| if (any(greaterThan(imageCoords, imageSize(inputImage)))) |
| return; |
| |
| // Read from input image |
| vec4 inputContent = imageLoad(inputImage, imageCoords); |
| |
| // Store inputContent into output Image |
| imageStore(outputImage, imageCoords, inputContent * abs(sin(time))); |
| }" |
| } |
| } |
| } |
| } |
| } |
| |
| readonly property ComputeCommand command: ComputeCommand { |
| readonly property int localWorkGroupSize: 16 |
| workGroupX: Math.ceil(inputTexture.width / localWorkGroupSize) |
| workGroupY: Math.ceil(inputTexture.height / localWorkGroupSize) |
| } |
| |
| components: [command, material] |
| } |
| |
| // Preview Texture Scene |
| Entity { |
| PlaneMesh { id: planeMesh } |
| |
| components: Transform { |
| rotationX: 90 |
| } |
| |
| Entity { |
| id: inputTexturePreview |
| readonly property Material material: TextureMaterial { |
| texture: inputTexture |
| } |
| readonly property Transform transform: Transform { |
| translation: Qt.vector3d(-1, 0, 0) |
| } |
| components: [planeMesh, material, transform] |
| } |
| |
| Entity { |
| id: outputTexturePreview |
| readonly property Material material: TextureMaterial { |
| texture: outputTexture |
| } |
| readonly property Transform transform: Transform { |
| translation: Qt.vector3d(1, 0, 0) |
| } |
| components: [planeMesh, material, transform] |
| } |
| } |
| } |