mirror of
https://github.com/KhronosGroup/Vulkan-Hpp.git
synced 2024-10-14 16:32:17 +00:00
203 lines
9.0 KiB
C++
203 lines
9.0 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 "../../samples/utils/geometries.hpp"
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#include "../../samples/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 <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::raii::Context context;
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vk::raii::Instance instance = vk::raii::su::makeInstance( context, AppName, EngineName, {}, vk::su::getInstanceExtensions() );
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#if !defined( NDEBUG )
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vk::raii::DebugUtilsMessengerEXT debugUtilsMessenger( instance, vk::su::makeDebugUtilsMessengerCreateInfoEXT() );
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#endif
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vk::raii::PhysicalDevice physicalDevice = vk::raii::PhysicalDevices( instance ).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::raii::su::SurfaceData surfaceData( instance, AppName, vk::Extent2D( 500, 500 ) );
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std::pair<uint32_t, uint32_t> graphicsAndPresentQueueFamilyIndex =
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vk::raii::su::findGraphicsAndPresentQueueFamilyIndex( physicalDevice, surfaceData.surface );
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vk::raii::Device device = vk::raii::su::makeDevice( physicalDevice, graphicsAndPresentQueueFamilyIndex.first, vk::su::getDeviceExtensions() );
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vk::raii::CommandPool commandPool = vk::raii::CommandPool( device, { {}, graphicsAndPresentQueueFamilyIndex.first } );
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vk::raii::CommandBuffer commandBuffer = vk::raii::su::makeCommandBuffer( device, commandPool );
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vk::raii::Queue graphicsQueue( device, graphicsAndPresentQueueFamilyIndex.first, 0 );
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vk::raii::Queue presentQueue( device, graphicsAndPresentQueueFamilyIndex.second, 0 );
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vk::raii::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::raii::su::BufferData texelBufferData( physicalDevice, device, sizeof( texels ), vk::BufferUsageFlagBits::eUniformTexelBuffer );
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texelBufferData.upload( texels );
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vk::BufferViewCreateInfo bufferViewCreateInfo( {}, texelBufferData.buffer, texelFormat, 0, sizeof( texels ) );
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vk::raii::BufferView texelBufferView( device, bufferViewCreateInfo );
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vk::raii::DescriptorSetLayout descriptorSetLayout =
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vk::raii::su::makeDescriptorSetLayout( device, { { vk::DescriptorType::eUniformTexelBuffer, 1, vk::ShaderStageFlagBits::eVertex } } );
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vk::raii::PipelineLayout pipelineLayout( device, { {}, *descriptorSetLayout } );
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vk::Format colorFormat = vk::su::pickSurfaceFormat( physicalDevice.getSurfaceFormatsKHR( surfaceData.surface ) ).format;
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vk::raii::RenderPass renderPass = vk::raii::su::makeRenderPass( device, colorFormat, vk::Format::eUndefined );
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glslang::InitializeProcess();
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vk::raii::ShaderModule vertexShaderModule = vk::raii::su::makeShaderModule( device, vk::ShaderStageFlagBits::eVertex, vertexShaderText );
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vk::raii::ShaderModule fragmentShaderModule = vk::raii::su::makeShaderModule( device, vk::ShaderStageFlagBits::eFragment, fragmentShaderText_C_C );
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glslang::FinalizeProcess();
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std::vector<vk::raii::Framebuffer> framebuffers =
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vk::raii::su::makeFramebuffers( device, renderPass, swapChainData.imageViews, nullptr, surfaceData.extent );
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vk::raii::DescriptorPool descriptorPool = vk::raii::su::makeDescriptorPool( device, { { vk::DescriptorType::eUniformTexelBuffer, 1 } } );
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vk::raii::DescriptorSet descriptorSet = std::move( vk::raii::DescriptorSets( device, { descriptorPool, *descriptorSetLayout } ).front() );
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vk::raii::su::updateDescriptorSets(
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device, descriptorSet, { { vk::DescriptorType::eUniformTexelBuffer, texelBufferData.buffer, VK_WHOLE_SIZE, &texelBufferView } }, {} );
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vk::raii::PipelineCache pipelineCache( device, vk::PipelineCacheCreateInfo() );
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vk::raii::Pipeline graphicsPipeline = vk::raii::su::makeGraphicsPipeline(
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device, pipelineCache, vertexShaderModule, nullptr, fragmentShaderModule, nullptr, 0, {}, vk::FrontFace::eClockwise, true, pipelineLayout, 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::raii::Semaphore imageAcquiredSemaphore( device, vk::SemaphoreCreateInfo() );
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vk::Result result;
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uint32_t imageIndex;
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std::tie( result, imageIndex ) = swapChainData.swapChain.acquireNextImage( vk::su::FenceTimeout, imageAcquiredSemaphore );
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assert( result == vk::Result::eSuccess );
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assert( imageIndex < swapChainData.images.size() );
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commandBuffer.begin( vk::CommandBufferBeginInfo() );
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vk::ClearValue clearValue;
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clearValue.color = vk::ClearColorValue( 0.2f, 0.2f, 0.2f, 0.2f );
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vk::RenderPassBeginInfo renderPassBeginInfo( renderPass, framebuffers[imageIndex], 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::raii::Fence drawFence( device, 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::PresentInfoKHR presentInfoKHR( nullptr, *swapChainData.swapChain, imageIndex );
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result = presentQueue.presentKHR( presentInfoKHR );
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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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}
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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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