mirror of
https://github.com/KhronosGroup/Vulkan-Hpp.git
synced 2024-10-14 16:32:17 +00:00
234 lines
11 KiB
C++
234 lines
11 KiB
C++
// Copyright(c) 2019, NVIDIA CORPORATION. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// VulkanHpp Samples : TexelBuffer
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// Use a texel buffer to draw a green triangle.
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#include "../utils/geometries.hpp"
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#include "../utils/math.hpp"
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#include "../utils/shaders.hpp"
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#include "../utils/utils.hpp"
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#include "SPIRV/GlslangToSpv.h"
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#include "vulkan/vulkan.hpp"
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#include <iostream>
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#include <thread>
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static char const * AppName = "TexelBuffer";
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static char const * EngineName = "Vulkan.hpp";
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static const std::string vertexShaderText = R"(
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#version 400
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#extension GL_ARB_separate_shader_objects : enable
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#extension GL_ARB_shading_language_420pack : enable
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layout (binding = 0) uniform samplerBuffer texels;
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layout (location = 0) out vec4 outColor;
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vec2 vertices[3];
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void main()
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{
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float r = texelFetch(texels, 0).r;
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float g = texelFetch(texels, 1).r;
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float b = texelFetch(texels, 2).r;
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outColor = vec4(r, g, b, 1.0);
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vertices[0] = vec2(-1.0, -1.0);
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vertices[1] = vec2( 1.0, -1.0);
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vertices[2] = vec2( 0.0, 1.0);
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gl_Position = vec4(vertices[gl_VertexIndex % 3], 0.0, 1.0);
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}
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)";
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int main( int /*argc*/, char ** /*argv*/ )
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{
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const float texels[] = { 118.0f / 255.0f, 185.0f / 255.0f, 0.0f };
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try
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{
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vk::Instance instance = vk::su::createInstance( AppName, EngineName, {}, vk::su::getInstanceExtensions() );
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#if !defined( NDEBUG )
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vk::DebugUtilsMessengerEXT debugUtilsMessenger = instance.createDebugUtilsMessengerEXT( vk::su::makeDebugUtilsMessengerCreateInfoEXT() );
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#endif
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vk::PhysicalDevice physicalDevice = instance.enumeratePhysicalDevices().front();
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vk::PhysicalDeviceProperties physicalDeviceProperties = physicalDevice.getProperties();
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if ( physicalDeviceProperties.limits.maxTexelBufferElements < 4 )
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{
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std::cout << "maxTexelBufferElements too small\n";
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exit( -1 );
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}
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vk::Format texelFormat = vk::Format::eR32Sfloat;
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vk::FormatProperties formatProperties = physicalDevice.getFormatProperties( texelFormat );
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if ( !( formatProperties.bufferFeatures & vk::FormatFeatureFlagBits::eUniformTexelBuffer ) )
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{
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std::cout << "R32_SFLOAT format unsupported for texel buffer\n";
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exit( -1 );
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}
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vk::su::SurfaceData surfaceData( instance, AppName, vk::Extent2D( 500, 500 ) );
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std::pair<uint32_t, uint32_t> graphicsAndPresentQueueFamilyIndex = vk::su::findGraphicsAndPresentQueueFamilyIndex( physicalDevice, surfaceData.surface );
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vk::Device device = vk::su::createDevice( physicalDevice, graphicsAndPresentQueueFamilyIndex.first, vk::su::getDeviceExtensions() );
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vk::CommandPool commandPool = vk::su::createCommandPool( device, graphicsAndPresentQueueFamilyIndex.first );
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vk::CommandBuffer commandBuffer =
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device.allocateCommandBuffers( vk::CommandBufferAllocateInfo( commandPool, vk::CommandBufferLevel::ePrimary, 1 ) ).front();
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vk::Queue graphicsQueue = device.getQueue( graphicsAndPresentQueueFamilyIndex.first, 0 );
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vk::Queue presentQueue = device.getQueue( graphicsAndPresentQueueFamilyIndex.second, 0 );
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vk::su::SwapChainData swapChainData( physicalDevice,
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device,
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surfaceData.surface,
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surfaceData.extent,
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vk::ImageUsageFlagBits::eColorAttachment | vk::ImageUsageFlagBits::eTransferSrc,
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{},
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graphicsAndPresentQueueFamilyIndex.first,
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graphicsAndPresentQueueFamilyIndex.second );
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vk::su::BufferData texelBufferData( physicalDevice, device, sizeof( texels ), vk::BufferUsageFlagBits::eUniformTexelBuffer );
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texelBufferData.upload( device, texels );
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vk::BufferView texelBufferView = device.createBufferView( vk::BufferViewCreateInfo( {}, texelBufferData.buffer, texelFormat, 0, sizeof( texels ) ) );
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vk::DescriptorSetLayout descriptorSetLayout =
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vk::su::createDescriptorSetLayout( device, { { vk::DescriptorType::eUniformTexelBuffer, 1, vk::ShaderStageFlagBits::eVertex } } );
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vk::PipelineLayout pipelineLayout = device.createPipelineLayout( vk::PipelineLayoutCreateInfo( vk::PipelineLayoutCreateFlags(), descriptorSetLayout ) );
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vk::RenderPass renderPass = vk::su::createRenderPass(
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device, vk::su::pickSurfaceFormat( physicalDevice.getSurfaceFormatsKHR( surfaceData.surface ) ).format, vk::Format::eUndefined );
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glslang::InitializeProcess();
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vk::ShaderModule vertexShaderModule = vk::su::createShaderModule( device, vk::ShaderStageFlagBits::eVertex, vertexShaderText );
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vk::ShaderModule fragmentShaderModule = vk::su::createShaderModule( device, vk::ShaderStageFlagBits::eFragment, fragmentShaderText_C_C );
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glslang::FinalizeProcess();
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std::vector<vk::Framebuffer> framebuffers = vk::su::createFramebuffers( device, renderPass, swapChainData.imageViews, vk::ImageView(), surfaceData.extent );
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vk::DescriptorPool descriptorPool = vk::su::createDescriptorPool( device, { { vk::DescriptorType::eUniformTexelBuffer, 1 } } );
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vk::DescriptorSetAllocateInfo descriptorSetAllocateInfo( descriptorPool, descriptorSetLayout );
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vk::DescriptorSet descriptorSet = device.allocateDescriptorSets( descriptorSetAllocateInfo ).front();
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vk::su::updateDescriptorSets( device, descriptorSet, { { vk::DescriptorType::eUniformTexelBuffer, texelBufferData.buffer, texelBufferView } }, {} );
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vk::PipelineCache pipelineCache = device.createPipelineCache( vk::PipelineCacheCreateInfo() );
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vk::Pipeline graphicsPipeline = vk::su::createGraphicsPipeline( device,
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pipelineCache,
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std::make_pair( vertexShaderModule, nullptr ),
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std::make_pair( fragmentShaderModule, nullptr ),
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0,
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{},
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vk::FrontFace::eClockwise,
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false,
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pipelineLayout,
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renderPass );
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/* VULKAN_KEY_START */
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// Get the index of the next available swapchain image:
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vk::Semaphore imageAcquiredSemaphore = device.createSemaphore( vk::SemaphoreCreateInfo() );
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vk::ResultValue<uint32_t> currentBuffer = device.acquireNextImageKHR( swapChainData.swapChain, vk::su::FenceTimeout, imageAcquiredSemaphore, nullptr );
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assert( currentBuffer.result == vk::Result::eSuccess );
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assert( currentBuffer.value < framebuffers.size() );
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commandBuffer.begin( vk::CommandBufferBeginInfo() );
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vk::ClearValue clearValue;
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clearValue.color = vk::ClearColorValue( std::array<float, 4>( { { 0.2f, 0.2f, 0.2f, 0.2f } } ) );
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vk::RenderPassBeginInfo renderPassBeginInfo(
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renderPass, framebuffers[currentBuffer.value], vk::Rect2D( vk::Offset2D( 0, 0 ), surfaceData.extent ), clearValue );
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commandBuffer.beginRenderPass( renderPassBeginInfo, vk::SubpassContents::eInline );
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commandBuffer.bindPipeline( vk::PipelineBindPoint::eGraphics, graphicsPipeline );
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commandBuffer.bindDescriptorSets( vk::PipelineBindPoint::eGraphics, pipelineLayout, 0, descriptorSet, nullptr );
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commandBuffer.setViewport(
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0, vk::Viewport( 0.0f, 0.0f, static_cast<float>( surfaceData.extent.width ), static_cast<float>( surfaceData.extent.height ), 0.0f, 1.0f ) );
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commandBuffer.setScissor( 0, vk::Rect2D( vk::Offset2D( 0, 0 ), surfaceData.extent ) );
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commandBuffer.draw( 3, 1, 0, 0 );
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commandBuffer.endRenderPass();
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commandBuffer.end();
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vk::Fence drawFence = device.createFence( vk::FenceCreateInfo() );
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vk::PipelineStageFlags waitDestinationStageMask( vk::PipelineStageFlagBits::eColorAttachmentOutput );
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vk::SubmitInfo submitInfo( imageAcquiredSemaphore, waitDestinationStageMask, commandBuffer );
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graphicsQueue.submit( submitInfo, drawFence );
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while ( vk::Result::eTimeout == device.waitForFences( drawFence, VK_TRUE, vk::su::FenceTimeout ) )
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;
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vk::Result result = presentQueue.presentKHR( vk::PresentInfoKHR( {}, swapChainData.swapChain, currentBuffer.value ) );
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switch ( result )
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{
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case vk::Result::eSuccess: break;
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case vk::Result::eSuboptimalKHR: std::cout << "vk::Queue::presentKHR returned vk::Result::eSuboptimalKHR !\n"; break;
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default: assert( false ); // an unexpected result is returned !
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}
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std::this_thread::sleep_for( std::chrono::milliseconds( 1000 ) );
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/* VULKAN_KEY_END */
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device.waitIdle();
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device.destroyFence( drawFence );
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device.destroySemaphore( imageAcquiredSemaphore );
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device.destroyPipeline( graphicsPipeline );
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device.destroyPipelineCache( pipelineCache );
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device.freeDescriptorSets( descriptorPool, descriptorSet );
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device.destroyDescriptorPool( descriptorPool );
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for ( auto framebuffer : framebuffers )
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{
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device.destroyFramebuffer( framebuffer );
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}
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device.destroyShaderModule( fragmentShaderModule );
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device.destroyShaderModule( vertexShaderModule );
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device.destroyRenderPass( renderPass );
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device.destroyPipelineLayout( pipelineLayout );
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device.destroyDescriptorSetLayout( descriptorSetLayout );
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device.destroyBufferView( texelBufferView );
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texelBufferData.clear( device );
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swapChainData.clear( device );
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device.freeCommandBuffers( commandPool, commandBuffer );
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device.destroyCommandPool( commandPool );
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device.destroy();
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instance.destroySurfaceKHR( surfaceData.surface );
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#if !defined( NDEBUG )
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instance.destroyDebugUtilsMessengerEXT( debugUtilsMessenger );
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#endif
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instance.destroy();
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}
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catch ( vk::SystemError & err )
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{
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std::cout << "vk::SystemError: " << err.what() << std::endl;
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exit( -1 );
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}
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catch ( std::exception & err )
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{
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std::cout << "std::exception: " << err.what() << std::endl;
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exit( -1 );
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}
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catch ( ... )
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{
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std::cout << "unknown error\n";
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exit( -1 );
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}
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return 0;
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}
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