mirror of https://github.com/snes9xgit/snes9x.git
270 lines
9.1 KiB
C++
270 lines
9.1 KiB
C++
#include "vulkan_simple_output.hpp"
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#include "slang_shader.hpp"
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namespace Vulkan
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{
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static const char *vertex_shader = R"(
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#version 450
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layout(location = 0) out vec2 texcoord;
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vec2 positions[3] = vec2[](vec2(-1.0, -3.0), vec2(3.0, 1.0), vec2(-1.0, 1.0));
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vec2 texcoords[3] = vec2[](vec2(0.0, -1.0), vec2(2.0, 1.0), vec2(0.0, 1.0));
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void main()
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{
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gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
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texcoord = texcoords[gl_VertexIndex];
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}
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)";
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static const char *fragment_shader = R"(
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#version 450
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layout(location = 0) in vec2 texcoord;
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layout(binding = 0) uniform sampler2D tsampler;
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layout(location = 0) out vec4 fragcolor;
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void main()
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{
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fragcolor = texture(tsampler, texcoord);
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}
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)";
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SimpleOutput::SimpleOutput(Context *context, vk::Format format)
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{
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this->context = context;
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device = context->device;
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swapchain = context->swapchain.get();
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this->format = format;
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create_pipeline();
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create_objects();
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}
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SimpleOutput::~SimpleOutput()
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{
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context->wait_idle();
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textures.clear();
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descriptors.clear();
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device.destroySampler(linear_sampler);
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device.destroySampler(nearest_sampler);
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}
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void SimpleOutput::create_objects()
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{
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descriptors.clear();
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for (int i = 0; i < queue_size; i++)
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{
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vk::DescriptorSetAllocateInfo dsai{};
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dsai
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.setDescriptorPool(context->descriptor_pool.get())
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.setDescriptorSetCount(1)
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.setSetLayouts(descriptor_set_layout.get());
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auto descriptor = device.allocateDescriptorSetsUnique(dsai);
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descriptors.push_back(std::move(descriptor[0]));
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}
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textures.clear();
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textures.resize(queue_size);
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for (auto &t : textures)
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{
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t.init(context);
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t.create(256, 224, format, vk::SamplerAddressMode::eClampToEdge, filter, false);
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}
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vk::SamplerCreateInfo sci{};
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sci.setAddressModeU(vk::SamplerAddressMode::eClampToEdge)
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.setAddressModeV(vk::SamplerAddressMode::eClampToEdge)
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.setAddressModeW(vk::SamplerAddressMode::eClampToEdge)
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.setMipmapMode(vk::SamplerMipmapMode::eLinear)
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.setAnisotropyEnable(false)
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.setMinFilter(vk::Filter::eLinear)
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.setMagFilter(vk::Filter::eLinear)
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.setUnnormalizedCoordinates(false)
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.setMinLod(1.0f)
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.setMaxLod(1.0f)
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.setMipLodBias(0.0)
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.setCompareEnable(false);
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linear_sampler = device.createSampler(sci);
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sci.setMinFilter(vk::Filter::eNearest)
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.setMagFilter(vk::Filter::eNearest);
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nearest_sampler = device.createSampler(sci);
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}
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void SimpleOutput::create_pipeline()
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{
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auto vertex_spirv = SlangShader::generate_spirv(vertex_shader, "vertex");
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auto fragment_spirv = SlangShader::generate_spirv(fragment_shader, "fragment");
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auto vertex_module = device.createShaderModuleUnique({ {}, vertex_spirv });
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auto fragment_module = device.createShaderModuleUnique({ {}, fragment_spirv });
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vk::PipelineShaderStageCreateInfo vertex_ci;
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vertex_ci.setStage(vk::ShaderStageFlagBits::eVertex)
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.setModule(vertex_module.get())
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.setPName("main");
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vk::PipelineShaderStageCreateInfo fragment_ci;
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fragment_ci.setStage(vk::ShaderStageFlagBits::eFragment)
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.setModule(fragment_module.get())
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.setPName("main");
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std::vector<vk::PipelineShaderStageCreateInfo> stages = { vertex_ci, fragment_ci };
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vk::PipelineVertexInputStateCreateInfo vertex_input_info{};
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vk::PipelineInputAssemblyStateCreateInfo pipeline_input_assembly_info{};
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pipeline_input_assembly_info.setTopology(vk::PrimitiveTopology::eTriangleList)
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.setPrimitiveRestartEnable(false);
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std::vector<vk::Viewport> viewports(1);
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viewports[0]
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.setX(0.0f)
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.setY(0.0f)
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.setWidth(256)
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.setHeight(256)
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.setMinDepth(0.0f)
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.setMaxDepth(1.0f);
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std::vector<vk::Rect2D> scissors(1);
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scissors[0].extent.width = 256;
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scissors[0].extent.height = 256;
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scissors[0].offset = vk::Offset2D(0, 0);
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vk::PipelineViewportStateCreateInfo pipeline_viewport_info;
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pipeline_viewport_info.setViewports(viewports)
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.setScissors(scissors);
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vk::PipelineRasterizationStateCreateInfo rasterizer_info;
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rasterizer_info.setCullMode(vk::CullModeFlagBits::eBack)
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.setFrontFace(vk::FrontFace::eClockwise)
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.setLineWidth(1.0f)
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.setDepthClampEnable(false)
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.setRasterizerDiscardEnable(false)
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.setPolygonMode(vk::PolygonMode::eFill)
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.setDepthBiasEnable(false)
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.setRasterizerDiscardEnable(false);
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vk::PipelineMultisampleStateCreateInfo multisample_info;
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multisample_info.setSampleShadingEnable(false)
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.setRasterizationSamples(vk::SampleCountFlagBits::e1);
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vk::PipelineDepthStencilStateCreateInfo depth_stencil_info;
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depth_stencil_info.setDepthTestEnable(false);
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vk::PipelineColorBlendAttachmentState blend_attachment_info;
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blend_attachment_info
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.setColorWriteMask(vk::ColorComponentFlagBits::eB |
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vk::ColorComponentFlagBits::eG |
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vk::ColorComponentFlagBits::eR |
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vk::ColorComponentFlagBits::eA)
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.setBlendEnable(true)
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.setColorBlendOp(vk::BlendOp::eAdd)
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.setSrcColorBlendFactor(vk::BlendFactor::eSrcAlpha)
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.setDstColorBlendFactor(vk::BlendFactor::eOneMinusSrcAlpha)
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.setAlphaBlendOp(vk::BlendOp::eAdd)
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.setSrcAlphaBlendFactor(vk::BlendFactor::eOne)
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.setSrcAlphaBlendFactor(vk::BlendFactor::eZero);
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vk::PipelineColorBlendStateCreateInfo blend_state_info;
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blend_state_info.setLogicOpEnable(false)
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.setAttachments(blend_attachment_info);
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std::vector<vk::DynamicState> states = { vk::DynamicState::eViewport, vk::DynamicState::eScissor };
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vk::PipelineDynamicStateCreateInfo dynamic_state_info({}, states);
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vk::DescriptorSetLayoutBinding dslb{};
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dslb.setBinding(0)
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.setStageFlags(vk::ShaderStageFlagBits::eFragment)
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.setDescriptorCount(1)
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.setDescriptorType(vk::DescriptorType::eCombinedImageSampler);
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vk::DescriptorSetLayoutCreateInfo dslci{};
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dslci.setBindings(dslb);
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descriptor_set_layout = device.createDescriptorSetLayoutUnique(dslci);
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vk::PipelineLayoutCreateInfo pipeline_layout_info;
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pipeline_layout_info.setSetLayoutCount(0)
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.setPushConstantRangeCount(0)
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.setSetLayouts(descriptor_set_layout.get());
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pipeline_layout = device.createPipelineLayoutUnique(pipeline_layout_info);
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vk::GraphicsPipelineCreateInfo pipeline_create_info;
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pipeline_create_info.setStageCount(2)
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.setStages(stages)
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.setPVertexInputState(&vertex_input_info)
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.setPInputAssemblyState(&pipeline_input_assembly_info)
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.setPViewportState(&pipeline_viewport_info)
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.setPRasterizationState(&rasterizer_info)
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.setPMultisampleState(&multisample_info)
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.setPDepthStencilState(&depth_stencil_info)
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.setPColorBlendState(&blend_state_info)
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.setPDynamicState(&dynamic_state_info)
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.setLayout(pipeline_layout.get())
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.setRenderPass(swapchain->get_render_pass())
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.setSubpass(0);
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auto [result, pipeline] = device.createGraphicsPipelineUnique(nullptr, pipeline_create_info);
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this->pipeline = std::move(pipeline);
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}
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void SimpleOutput::set_filter(bool on)
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{
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filter = on;
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}
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bool SimpleOutput::do_frame_without_swap(uint8_t *buffer, int width, int height, int byte_stride, int viewport_x, int viewport_y, int viewport_width, int viewport_height)
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{
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if (!context)
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return false;
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if (!swapchain->begin_frame())
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return false;
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auto &tex = textures[current_frame];
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auto &cmd = swapchain->get_cmd();
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auto extents = swapchain->get_extents();
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auto &dstset = descriptors[current_frame].get();
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tex.from_buffer(cmd, (uint8_t *)buffer, width, height, byte_stride);
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swapchain->begin_render_pass();
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vk::DescriptorImageInfo dii{};
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dii.setImageView(tex.image_view)
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.setSampler(filter ? linear_sampler : nearest_sampler)
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.setImageLayout(vk::ImageLayout::eShaderReadOnlyOptimal);
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vk::WriteDescriptorSet wds{};
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wds.setDescriptorCount(1)
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.setDstBinding(0)
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.setDstArrayElement(0)
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.setDstSet(dstset)
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.setDescriptorType(vk::DescriptorType::eCombinedImageSampler)
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.setImageInfo(dii);
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device.updateDescriptorSets(wds, {});
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cmd.bindPipeline(vk::PipelineBindPoint::eGraphics, pipeline.get());
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cmd.bindDescriptorSets(vk::PipelineBindPoint::eGraphics, pipeline_layout.get(), 0, dstset, {});
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cmd.setViewport(0, vk::Viewport(viewport_x, viewport_y, viewport_width, viewport_height, 0.0f, 1.0f));
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cmd.setScissor(0, vk::Rect2D({}, extents));
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cmd.draw(3, 1, 0, 0);
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swapchain->end_render_pass();
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swapchain->end_frame_without_swap();
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current_frame = (current_frame + 1) % queue_size;
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return true;
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}
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bool SimpleOutput::do_frame(uint8_t *buffer, int width, int height, int byte_stride, int viewport_x, int viewport_y, int viewport_width, int viewport_height)
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{
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if (!do_frame_without_swap(buffer, width, height, byte_stride, viewport_x, viewport_y, viewport_width, viewport_height))
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return false;
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swapchain->swap();
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return true;
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}
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} // namespace Vulkan
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