Orange/src/Apps/Tools/CubeTest.cpp

#include <Orange/Core/Array.h>
#include <Orange/Core/Vector.h>
#include "Orange/Core/Span.h"
#include <Orange/Core/Result.h>
#include <Orange/Core/FileSystem.h>
#include <Orange/Math/Vector.h>
#include <Orange/Math/Matrix.h>
#include <Orange/Core/Parse.h>
#include <Orange/Core/Variant.h>

#include <Orange/Render/Window.h>
#include <Orange/Render/RenderContext.h>
#include <Orange/Render/Swapchain.h>

#include <vs_Triangle.h>
#include <fs_DebugVertColor.h>

using namespace orange;

struct AABB
{
    vec3 min;
    vec3 max;

    void Extend(vec3 pos)
    {
        min = Min(pos, min);
        max = Max(pos, max);
    }
};

enum class MeshVertexType
{
    Static,
    Skinned,
};

struct StaticVertex
{
    vec3 pos;
    vec2 uv;
    vec3 normal;
    vec3 tangent;

    bool operator == (const StaticVertex& other) const
    {
        return pos     == other.pos &&
               uv      == other.uv &&
               normal  == other.normal &&
               tangent == other.tangent;
    }
};

struct SkinnedVertex : public StaticVertex
{
    static constexpr uint32_t MaxVertexWeights = 4;

    bool operator == (const SkinnedVertex& other) const
    {
        return pos         == other.pos &&
               uv          == other.uv &&
               normal      == other.normal &&
               tangent     == other.tangent &&
               boneIndices == other.boneIndices &&
               boneWeights == other.boneWeights;
    }

    Array<uint8_t, MaxVertexWeights> boneIndices;
    Array<uint8_t, MaxVertexWeights> boneWeights;
};

struct MeshData
{
    MeshData(MeshVertexType type)
        : vertexType(type)
    {
        switch(type)
        {
            case MeshVertexType::Static:
                vertices.Construct<Vector<StaticVertex>>();
                break;
            case MeshVertexType::Skinned:
                vertices.Construct<Vector<SkinnedVertex>>();
                break;
        }
    }

    Vector<StaticVertex>&  GetStaticVertices()
    {
        Assert(vertexType == MeshVertexType::Static);
        return vertices.Get<Vector<StaticVertex>>();
    }

    Vector<SkinnedVertex>& GetSkinnedVertices()
    {
        Assert(vertexType == MeshVertexType::Skinned);
        return vertices.Get<Vector<SkinnedVertex>>();
    }

    MeshVertexType vertexType;
    Variant<Vector<StaticVertex>, Vector<SkinnedVertex>> vertices;
    Vector<uint16_t> indices;
    AABB             bounds;
};

Result<MeshData> ParseOBJ(StringView buffer)
{
    MeshData data{ MeshVertexType::Static };

    Vector<vec3> positions;
    Vector<vec2> uvs;
    Vector<vec3> normals;

    const char* obj = buffer.data;
    const char* end = buffer.data + buffer.size;
    while (obj != end)
    {
        SmallVector<char, 8> element;
        stream::ReadString(obj, end, " #\n", element);

        if (element == "v" || element == "vt" || element == "vn")
        {
            float vtx[3]{};
            for (int i = 0; i < 3; i++)
            {
                stream::ConsumeSpace(obj, end);
                if (auto r_float = stream::Parse<float>(obj, end))
                    vtx[i] = *r_float;
                else
                    return Result<MeshData>::Error();
            }

            if (element == "v")
                positions.EmplaceBack(vtx[0], vtx[1], vtx[2]);
            else if (element == "vt")
                normals.EmplaceBack(vtx[0], vtx[1], vtx[2]);
            else if (element == "vn")
                uvs.EmplaceBack(vtx[0], vtx[1]);
        }
        else if (element == "g" || element == "o")
        {
            stream::ConsumeSpace(obj, end);
            SmallVector<char, 32> name;
            stream::ReadString(obj, end, " #\n", name);

            name.PushBack('\0');
            if (element == "g")
                log::info("Group name: %s", name.Data());
            else
                log::info("Object name: %s", name.Data());
        }
        else if (element == "f")
        {
            int32_t indices[3][3]{};
            for (int i = 0; i < 3; i++)
            {
                stream::ConsumeSpace(obj, end);

                for (int j = 0; j < 3; j++)
                {
                    indices[i][j] = -1;

                    if (j == 0 || stream::Consume(obj, end, "/"))
                    {
                        if (auto r_int = stream::Parse<uint32_t>(obj, end))
                            indices[i][j] = *r_int;
                    }
                }
            }

            for (int i = 0; i < 3; i++)
            {
                StaticVertex vertex =
                {
                    .pos    = indices[i][0] != -1 ? positions[indices[i][0]] : vec3{},
                    .uv     = indices[i][1] != -1 ? uvs      [indices[i][1]] : vec2{},
                    .normal = indices[i][2] != -1 ? normals  [indices[i][2]] : vec3{},
                };

                auto& vertices = data.GetStaticVertices();

                size_t vertexIdx = vertices.FindIdx(vertex);
                if (vertexIdx == vertices.InvalidIdx)
                {
                    data.bounds.Extend(vertex.pos);
                    vertexIdx = vertices.PushBack(vertex);
                }

                Assert(vertexIdx < UINT16_MAX);
                data.indices.PushBack(uint16_t(vertexIdx));
            }
        }
        else if (!element.Empty())
        {
            element.PushBack('\0');
            log::info("Unknown element: %s", element.Data());
        }

        stream::AdvancePast(obj, end, "\n");
    };

    return Result<MeshData>::Success(data);
}

int main(int argc, char** argv)
{
    (void)argc; (void)argv;

    auto r_window = Window::Create();
    if (!r_window)
        return 1;

    auto r_renderContext = RenderContext::Create("Cube Test");
    if (!r_renderContext)
        return 1;

    auto r_surface = r_window->CreateSurface(r_renderContext->Instance());
    if (!r_surface)
        return 1;

    auto r_swapchain = Swapchain::Create(*r_renderContext, *r_surface);
    if (!r_swapchain)
        return 1;

    auto r_objData = fs::OpenFileIntoTextBuffer("/home/joshua/chair.obj");
    if (!r_objData)
        return 1;

    auto r_mesh = ParseOBJ(*r_objData);

    auto r_vs = r_renderContext->CreateShader(vs_Triangle);
    if (!r_vs) return 1;
    auto r_fs = r_renderContext->CreateShader(fs_DebugVertColor);
    if (!r_fs) return 1;

    VkPipelineShaderStageCreateInfo stages[] =
    {
        {
            .sType  = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
            .stage  = VK_SHADER_STAGE_VERTEX_BIT,
            .module = *r_vs,
            .pName  = "main",
        },
        {
            .sType  = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
            .stage  = VK_SHADER_STAGE_FRAGMENT_BIT,
            .module = *r_fs,
            .pName  = "main",
        },
    };

    Array<VkDynamicState, 2> dynamicStates =
    {
        VK_DYNAMIC_STATE_VIEWPORT,
        VK_DYNAMIC_STATE_SCISSOR,
    };

    VkPipelineDynamicStateCreateInfo dynamicStateInfo =
    {
        .sType             = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO,
        .dynamicStateCount = uint32_t(dynamicStates.Size()),
        .pDynamicStates    = dynamicStates.Data(),
    };

    VkPipelineVertexInputStateCreateInfo vertexInputInfo =
    {
        .sType                           = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
        .vertexBindingDescriptionCount   = 0u,
        .pVertexBindingDescriptions      = nullptr,
        .vertexAttributeDescriptionCount = 0u,
        .pVertexAttributeDescriptions    = nullptr,
    };

    VkPipelineInputAssemblyStateCreateInfo inputAssemblyInfo =
    {
        .sType                  = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO,
        .topology               = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
        .primitiveRestartEnable = VK_FALSE,
    };

    VkPipelineViewportStateCreateInfo viewportStateInfo =
    {
        .sType         = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO,
        .viewportCount = 1,
        .scissorCount  = 1,
    };

    VkPipelineRasterizationStateCreateInfo rasterizationInfo =
    {
        .sType     = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO,
        .cullMode  = VK_CULL_MODE_NONE, //VK_CULL_MODE_BACK_BIT,
        .frontFace = VK_FRONT_FACE_CLOCKWISE,
    };

    VkPipelineMultisampleStateCreateInfo multisampleInfo =
    {
        .sType                = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO,
        .rasterizationSamples = VK_SAMPLE_COUNT_1_BIT,
    };

    VkPipelineColorBlendAttachmentState attachmentBlendState =
    {
        .colorWriteMask =  VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT |
                           VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT,
    };

    VkPipelineColorBlendStateCreateInfo colorBlendStateInfo =
    {
        .sType           = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO,
        .attachmentCount = 1,
        .pAttachments    = &attachmentBlendState,
    };

    VkPipelineLayoutCreateInfo pipelineLayoutInfo =
    {
        .sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
    };
    VkPipelineLayout pipelineLayout = VK_NULL_HANDLE;
    vkCreatePipelineLayout(r_renderContext->Device(), &pipelineLayoutInfo, nullptr, &pipelineLayout);

    VkFormat format = r_swapchain->Format();
    VkPipelineRenderingCreateInfo renderingInfo =
    {
        .sType = VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO,
        .viewMask = 0u,
        .colorAttachmentCount = 1u,
        .pColorAttachmentFormats = &format,
    };

    VkGraphicsPipelineCreateInfo pipelineInfo =
    {
        .sType               = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO,
        .pNext               = &renderingInfo,
        .stageCount          = Size(stages),
        .pStages             = stages,
        .pVertexInputState   = &vertexInputInfo,
        .pInputAssemblyState = &inputAssemblyInfo,
        .pViewportState      = &viewportStateInfo,
        .pRasterizationState = &rasterizationInfo,
        .pMultisampleState   = &multisampleInfo,
        .pDepthStencilState  = nullptr,
        .pColorBlendState    = &colorBlendStateInfo,
        .pDynamicState       = &dynamicStateInfo,
        .layout              = pipelineLayout,
    };

    VkPipeline pipeline = VK_NULL_HANDLE;
    if (vkCreateGraphicsPipelines(r_renderContext->Device(), VK_NULL_HANDLE, 1, &pipelineInfo, nullptr, &pipeline) != VK_SUCCESS)
    {
        log::err("Blah");
        return 1;
    }

    while (r_window->Update())
    {
        VkCommandBuffer cmdBuf = r_swapchain->CommandBuffer();
        r_renderContext->BeginCommandBuffer(cmdBuf);
        {
            VkViewport viewport =
            {
                .x        = 0.0f,
                .y        = 0.0f,
                .width    = float(r_swapchain->Extent().width),
                .height   = float(r_swapchain->Extent().height),
                .minDepth = 0.0f,
                .maxDepth = 1.0f,
            };

            VkRect2D scissor =
            {
                .offset = {0u, 0u},
                .extent = r_swapchain->Extent(),
            };

            vkCmdSetViewport(cmdBuf, 0, 1, &viewport);
            vkCmdSetScissor(cmdBuf, 0, 1, &scissor);

            vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);

            const VkRenderingAttachmentInfoKHR attachmentInfo =
            {
                .sType       = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO_KHR,
                .imageView   = r_swapchain->ImageView(),
                .imageLayout = VK_IMAGE_LAYOUT_ATTACHMENT_OPTIMAL_KHR,
                .loadOp      = VK_ATTACHMENT_LOAD_OP_CLEAR,
                .storeOp     = VK_ATTACHMENT_STORE_OP_STORE,
                .clearValue  = { .color = { .float32 = { 1.0f, 0.5f, 0.0f, 1.0f } } },
            };

            const VkRenderingInfo renderInfo =
            {
                .sType                = VK_STRUCTURE_TYPE_RENDERING_INFO,
                .renderArea           = { {}, r_swapchain->Extent() },
                .layerCount           = 1,
                .colorAttachmentCount = 1,
                .pColorAttachments    = &attachmentInfo,
            };
            vkCmdBeginRendering(cmdBuf, &renderInfo);
            vkCmdDraw(cmdBuf, 3, 1, 0, 0);
            vkCmdEndRendering(cmdBuf);
        }
        r_renderContext->EndCommandBuffer(cmdBuf);
        r_swapchain->Present();
    }

    return 0;
}