Initial boot

src/ui/ui_renderer.cpp

@@ -0,0 +1,654 @@
+#ifdef _WIN32
+#define _CRT_SECURE_NO_WARNINGS
+#define WIN32_LEAN_AND_MEAN
+#endif
+
+#include <fstream>
+#include <filesystem>
+
+#include <concurrentqueue.h>
+
+#include "rt64_render_hooks.h"
+#include "rt64_render_interface_builders.h"
+#include "rt64_texture_cache.h"
+
+#include "RmlUi/Core/RenderInterfaceCompatibility.h"
+
+#include "ui_renderer.h"
+
+#include "InterfaceVS.hlsl.spirv.h"
+#include "InterfacePS.hlsl.spirv.h"
+
+#ifdef _WIN32
+#   include "InterfaceVS.hlsl.dxil.h"
+#   include "InterfacePS.hlsl.dxil.h"
+#endif
+
+#ifdef _WIN32
+#    define GET_SHADER_BLOB(name, format) \
+        ((format) == RT64::RenderShaderFormat::SPIRV ? name##BlobSPIRV : \
+        (format) == RT64::RenderShaderFormat::DXIL ? name##BlobDXIL : nullptr)
+#    define GET_SHADER_SIZE(name, format) \
+        ((format) == RT64::RenderShaderFormat::SPIRV ? std::size(name##BlobSPIRV) : \
+        (format) == RT64::RenderShaderFormat::DXIL ? std::size(name##BlobDXIL) : 0)
+#else
+#    define GET_SHADER_BLOB(name, format) \
+        ((format) == RT64::RenderShaderFormat::SPIRV ? name##BlobSPIRV : nullptr)
+#    define GET_SHADER_SIZE(name, format) \
+        ((format) == RT64::RenderShaderFormat::SPIRV ? std::size(name##BlobSPIRV) : 0)
+#endif
+
+// TODO deduplicate from rt64_common.h
+void CalculateTextureRowWidthPadding(uint32_t rowPitch, uint32_t &rowWidth, uint32_t &rowPadding) {
+    const int RowMultiple = 256;
+    rowWidth = rowPitch;
+    rowPadding = (rowWidth % RowMultiple) ? RowMultiple - (rowWidth % RowMultiple) : 0;
+    rowWidth += rowPadding;
+}
+
+struct RmlPushConstants {
+    Rml::Matrix4f transform;
+    Rml::Vector2f translation;
+};
+
+struct TextureHandle {
+    std::unique_ptr<RT64::RenderTexture> texture;
+    std::unique_ptr<RT64::RenderDescriptorSet> set;
+    bool transitioned = false;
+};
+
+template <typename T>
+T from_bytes_le(const char* input) {
+    return *reinterpret_cast<const T*>(input);
+}
+
+typedef std::pair<std::string, std::vector<char>> ImageFromBytes;
+
+namespace recompui {
+class RmlRenderInterface_RT64_impl : public Rml::RenderInterfaceCompatibility {
+    struct DynamicBuffer {
+        std::unique_ptr<RT64::RenderBuffer> buffer_{};
+        uint32_t size_ = 0;
+        uint32_t bytes_used_ = 0;
+        uint8_t* mapped_data_ = nullptr;
+        RT64::RenderBufferFlags flags_ = RT64::RenderBufferFlag::NONE;
+    };
+
+    static constexpr uint32_t per_frame_descriptor_set = 0;
+    static constexpr uint32_t per_draw_descriptor_set = 1;
+
+    static constexpr uint32_t initial_upload_buffer_size = 1024 * 1024;
+    static constexpr uint32_t initial_vertex_buffer_size = 512 * sizeof(Rml::Vertex);
+    static constexpr uint32_t initial_index_buffer_size = 1024 * sizeof(int);
+    static constexpr RT64::RenderFormat RmlTextureFormat = RT64::RenderFormat::R8G8B8A8_UNORM;
+    static constexpr RT64::RenderFormat RmlTextureFormatBgra = RT64::RenderFormat::B8G8R8A8_UNORM;
+    static constexpr RT64::RenderFormat SwapChainFormat = RT64::RenderFormat::B8G8R8A8_UNORM;
+    static constexpr uint32_t RmlTextureFormatBytesPerPixel = RenderFormatSize(RmlTextureFormat);
+    static_assert(RenderFormatSize(RmlTextureFormatBgra) == RmlTextureFormatBytesPerPixel);
+    RT64::RenderInterface* interface_;
+    RT64::RenderDevice* device_;
+    int scissor_x_ = 0;
+    int scissor_y_ = 0;
+    int scissor_width_ = 0;
+    int scissor_height_ = 0;
+    int window_width_ = 0;
+    int window_height_ = 0;
+    RT64::RenderMultisampling multisampling_ = RT64::RenderMultisampling();
+    Rml::Matrix4f projection_mtx_ = Rml::Matrix4f::Identity();
+    Rml::Matrix4f transform_ = Rml::Matrix4f::Identity();
+    Rml::Matrix4f mvp_ = Rml::Matrix4f::Identity();
+    std::unordered_map<Rml::TextureHandle, TextureHandle> textures_{};
+    Rml::TextureHandle texture_count_ = 2; // Start at 1 to reserve texture 0 as the 1x1 pixel white texture
+    DynamicBuffer upload_buffer_;
+    DynamicBuffer vertex_buffer_;
+    DynamicBuffer index_buffer_;
+    std::unique_ptr<RT64::RenderSampler> nearestSampler_{};
+    std::unique_ptr<RT64::RenderSampler> linearSampler_{};
+    std::unique_ptr<RT64::RenderShader> vertex_shader_{};
+    std::unique_ptr<RT64::RenderShader> pixel_shader_{};
+    std::unique_ptr<RT64::RenderDescriptorSet> sampler_set_{};
+    std::unique_ptr<RT64::RenderDescriptorSetBuilder> texture_set_builder_{};
+    std::unique_ptr<RT64::RenderPipelineLayout> layout_{};
+    std::unique_ptr<RT64::RenderPipeline> pipeline_{};
+    std::unique_ptr<RT64::RenderPipeline> pipeline_ms_{};
+    std::unique_ptr<RT64::RenderTexture> screen_texture_ms_{};
+    std::unique_ptr<RT64::RenderTexture> screen_texture_{};
+    std::unique_ptr<RT64::RenderFramebuffer> screen_framebuffer_{};
+    std::unique_ptr<RT64::RenderDescriptorSet> screen_descriptor_set_{};
+    std::unique_ptr<RT64::RenderBuffer> screen_vertex_buffer_{};
+    std::unique_ptr<RT64::RenderCommandQueue> copy_command_queue_{};
+    std::unique_ptr<RT64::RenderCommandList> copy_command_list_{};
+    std::unique_ptr<RT64::RenderBuffer> copy_buffer_{};
+    std::unique_ptr<RT64::RenderCommandFence> copy_command_fence_;
+    uint64_t copy_buffer_size_ = 0;
+    uint64_t screen_vertex_buffer_size_ = 0;
+    uint32_t gTexture_descriptor_index;
+    RT64::RenderInputSlot vertex_slot_{ 0, sizeof(Rml::Vertex) };
+    RT64::RenderCommandList* list_ = nullptr;
+    bool scissor_enabled_ = false;
+    std::vector<std::unique_ptr<RT64::RenderBuffer>> stale_buffers_{};
+    moodycamel::ConcurrentQueue<ImageFromBytes> image_from_bytes_queue;
+    std::unordered_map<std::string, std::vector<char>> image_from_bytes_map;
+public:
+    RmlRenderInterface_RT64_impl(RT64::RenderInterface* interface, RT64::RenderDevice* device) {
+        interface_ = interface;
+        device_ = device;
+
+        // Enable 4X MSAA if supported by the device.
+        const RT64::RenderSampleCounts desired_sample_count = RT64::RenderSampleCount::COUNT_8;
+        if (device_->getSampleCountsSupported(SwapChainFormat) & desired_sample_count) {
+            multisampling_.sampleCount = desired_sample_count;
+        }
+
+        vertex_buffer_.flags_ = RT64::RenderBufferFlag::VERTEX;
+        index_buffer_.flags_ = RT64::RenderBufferFlag::INDEX;
+
+        // Create the texture upload buffer, vertex buffer and index buffer
+        resize_dynamic_buffer(upload_buffer_, initial_upload_buffer_size, false);
+        resize_dynamic_buffer(vertex_buffer_, initial_vertex_buffer_size, false);
+        resize_dynamic_buffer(index_buffer_, initial_index_buffer_size, false);
+
+        // Describe the vertex format
+        std::vector<RT64::RenderInputElement> vertex_elements{};
+        vertex_elements.emplace_back(RT64::RenderInputElement{ "POSITION", 0, 0, RT64::RenderFormat::R32G32_FLOAT, 0, offsetof(Rml::Vertex, position) });
+        vertex_elements.emplace_back(RT64::RenderInputElement{ "COLOR", 0, 1, RT64::RenderFormat::R8G8B8A8_UNORM, 0, offsetof(Rml::Vertex, colour) });
+        vertex_elements.emplace_back(RT64::RenderInputElement{ "TEXCOORD", 0, 2, RT64::RenderFormat::R32G32_FLOAT, 0, offsetof(Rml::Vertex, tex_coord) });
+
+        // Create a nearest sampler and a linear sampler
+        RT64::RenderSamplerDesc samplerDesc;
+        samplerDesc.minFilter = RT64::RenderFilter::NEAREST;
+        samplerDesc.magFilter = RT64::RenderFilter::NEAREST;
+        samplerDesc.addressU = RT64::RenderTextureAddressMode::CLAMP;
+        samplerDesc.addressV = RT64::RenderTextureAddressMode::CLAMP;
+        samplerDesc.addressW = RT64::RenderTextureAddressMode::CLAMP;
+        nearestSampler_ = device_->createSampler(samplerDesc);
+
+        samplerDesc.minFilter = RT64::RenderFilter::LINEAR;
+        samplerDesc.magFilter = RT64::RenderFilter::LINEAR;
+        linearSampler_ = device_->createSampler(samplerDesc);
+
+        // Create the shaders
+        RT64::RenderShaderFormat shaderFormat = interface_->getCapabilities().shaderFormat;
+
+        vertex_shader_ = device_->createShader(GET_SHADER_BLOB(InterfaceVS, shaderFormat), GET_SHADER_SIZE(InterfaceVS, shaderFormat), "VSMain", shaderFormat);
+        pixel_shader_ = device_->createShader(GET_SHADER_BLOB(InterfacePS, shaderFormat), GET_SHADER_SIZE(InterfacePS, shaderFormat), "PSMain", shaderFormat);
+
+
+        // Create the descriptor set that contains the sampler
+        RT64::RenderDescriptorSetBuilder sampler_set_builder{};
+        sampler_set_builder.begin();
+        sampler_set_builder.addImmutableSampler(1, linearSampler_.get());
+        sampler_set_builder.addConstantBuffer(3, 1); // Workaround D3D12 crash due to an empty RT64 descriptor set
+        sampler_set_builder.end();
+        sampler_set_ = sampler_set_builder.create(device_);
+
+        // Create a builder for the descriptor sets that will contain textures
+        texture_set_builder_ = std::make_unique<RT64::RenderDescriptorSetBuilder>();
+        texture_set_builder_->begin();
+        gTexture_descriptor_index = texture_set_builder_->addTexture(2);
+        texture_set_builder_->end();
+
+        // Create the pipeline layout
+        RT64::RenderPipelineLayoutBuilder layout_builder{};
+        layout_builder.begin(false, true);
+        layout_builder.addPushConstant(0, 0, sizeof(RmlPushConstants), RT64::RenderShaderStageFlag::VERTEX);
+        // Add the descriptor set for descriptors changed once per frame.
+        layout_builder.addDescriptorSet(sampler_set_builder);
+        // Add the descriptor set for descriptors changed once per draw.
+        layout_builder.addDescriptorSet(*texture_set_builder_);
+        layout_builder.end();
+        layout_ = layout_builder.create(device_);
+
+        // Create the pipeline description
+        RT64::RenderGraphicsPipelineDesc pipeline_desc{};
+        pipeline_desc.renderTargetBlend[0] = RT64::RenderBlendDesc::AlphaBlend();
+        pipeline_desc.renderTargetFormat[0] = SwapChainFormat; // TODO: Use whatever format the swap chain was created with.
+        pipeline_desc.renderTargetCount = 1;
+        pipeline_desc.cullMode = RT64::RenderCullMode::NONE;
+        pipeline_desc.inputSlots = &vertex_slot_;
+        pipeline_desc.inputSlotsCount = 1;
+        pipeline_desc.inputElements = vertex_elements.data();
+        pipeline_desc.inputElementsCount = uint32_t(vertex_elements.size());
+        pipeline_desc.pipelineLayout = layout_.get();
+        pipeline_desc.primitiveTopology = RT64::RenderPrimitiveTopology::TRIANGLE_LIST;
+        pipeline_desc.vertexShader = vertex_shader_.get();
+        pipeline_desc.pixelShader = pixel_shader_.get();
+
+        pipeline_ = device_->createGraphicsPipeline(pipeline_desc);
+
+        if (multisampling_.sampleCount > 1) {
+            pipeline_desc.multisampling = multisampling_;
+            pipeline_ms_ = device_->createGraphicsPipeline(pipeline_desc);
+
+            // Create the descriptor set for the screen drawer.
+            RT64::RenderDescriptorRange screen_descriptor_range(RT64::RenderDescriptorRangeType::TEXTURE, 2, 1);
+            screen_descriptor_set_ = device_->createDescriptorSet(RT64::RenderDescriptorSetDesc(&screen_descriptor_range, 1));
+
+            // Create vertex buffer for the screen drawer (full-screen triangle).
+            screen_vertex_buffer_size_ = sizeof(Rml::Vertex) * 3;
+            screen_vertex_buffer_ = device_->createBuffer(RT64::RenderBufferDesc::VertexBuffer(screen_vertex_buffer_size_, RT64::RenderHeapType::UPLOAD));
+            Rml::Vertex *vertices = (Rml::Vertex *)(screen_vertex_buffer_->map());
+            const Rml::ColourbPremultiplied white(255, 255, 255, 255);
+            vertices[0] = Rml::Vertex{ Rml::Vector2f(-1.0f, 1.0f), white, Rml::Vector2f(0.0f, 0.0f) };
+            vertices[1] = Rml::Vertex{ Rml::Vector2f(-1.0f, -3.0f), white, Rml::Vector2f(0.0f, 2.0f) };
+            vertices[2] = Rml::Vertex{ Rml::Vector2f(3.0f, 1.0f), white, Rml::Vector2f(2.0f, 0.0f) };
+            screen_vertex_buffer_->unmap();
+        }
+
+        copy_command_queue_ = device->createCommandQueue(RT64::RenderCommandListType::COPY);
+        copy_command_list_ = device->createCommandList(RT64::RenderCommandListType::COPY);
+        copy_command_fence_ = device->createCommandFence();
+    }
+
+    void reset_dynamic_buffer(DynamicBuffer &dynamic_buffer) {
+        assert(dynamic_buffer.mapped_data_ == nullptr);
+        dynamic_buffer.bytes_used_ = 0;
+        dynamic_buffer.mapped_data_ = reinterpret_cast<uint8_t*>(dynamic_buffer.buffer_->map());
+    }
+
+    void end_dynamic_buffer(DynamicBuffer &dynamic_buffer) {
+        assert(dynamic_buffer.mapped_data_ != nullptr);
+        dynamic_buffer.buffer_->unmap();
+        dynamic_buffer.mapped_data_ = nullptr;
+    }
+
+    void resize_dynamic_buffer(DynamicBuffer &dynamic_buffer, uint32_t new_size, bool map = true) {
+        // Unmap the buffer if it's mapped
+        if (dynamic_buffer.mapped_data_ != nullptr) {
+            dynamic_buffer.buffer_->unmap();
+        }
+        
+        // If there's already a buffer, move it into the stale buffers so it persists until the start of next frame.
+        if (dynamic_buffer.buffer_ != nullptr) {
+            stale_buffers_.emplace_back(std::move(dynamic_buffer.buffer_));
+        }
+
+        // Create the new buffer, update the size and map it.
+        dynamic_buffer.buffer_ = device_->createBuffer(RT64::RenderBufferDesc::UploadBuffer(new_size, dynamic_buffer.flags_));
+        dynamic_buffer.size_ = new_size;
+        dynamic_buffer.bytes_used_ = 0;
+
+        if (map) {
+            dynamic_buffer.mapped_data_ = reinterpret_cast<uint8_t*>(dynamic_buffer.buffer_->map());
+        }
+    }
+
+    uint32_t allocate_dynamic_data(DynamicBuffer &dynamic_buffer, uint32_t num_bytes) {
+        // Check if there's enough remaining room in the buffer to allocate the requested bytes.
+        uint32_t total_bytes = num_bytes + dynamic_buffer.bytes_used_;
+
+        if (total_bytes > dynamic_buffer.size_) {
+            // There isn't, so mark the current buffer as stale and allocate a new one with 50% more space than the required amount.
+            resize_dynamic_buffer(dynamic_buffer, total_bytes + total_bytes / 2);
+        }
+
+        // Record the current end of the buffer to return.
+        uint32_t offset = dynamic_buffer.bytes_used_;
+
+        // Bump the buffer's end forward by the number of bytes allocated.
+        dynamic_buffer.bytes_used_ += num_bytes;
+
+        return offset;
+    }
+
+    uint32_t allocate_dynamic_data_aligned(DynamicBuffer &dynamic_buffer, uint32_t num_bytes, uint32_t alignment) {
+        // Check if there's enough remaining room in the buffer to allocate the requested bytes.
+        uint32_t total_bytes = num_bytes + dynamic_buffer.bytes_used_;
+
+        // Determine the amount of padding needed to meet the target alignment.
+        uint32_t padding_bytes = ((dynamic_buffer.bytes_used_ + alignment - 1) / alignment) * alignment - dynamic_buffer.bytes_used_;
+
+        // If there isn't enough room to allocate the required bytes plus the padding then resize the buffer and allocate from the start of the new one.
+        if (total_bytes + padding_bytes > dynamic_buffer.size_) {
+            resize_dynamic_buffer(dynamic_buffer, total_bytes + total_bytes / 2);
+
+            dynamic_buffer.bytes_used_ += num_bytes;
+
+            return 0;
+        }
+
+        // Otherwise allocate the padding and required bytes and offset the allocated position by the padding size.
+        return allocate_dynamic_data(dynamic_buffer, padding_bytes + num_bytes) + padding_bytes;
+    }
+    
+    void RenderGeometry(Rml::Vertex* vertices, int num_vertices, int* indices, int num_indices, Rml::TextureHandle texture, const Rml::Vector2f& translation) override {
+        if (!textures_.contains(texture)) {
+            if (texture == 0) {
+                Rml::byte white_pixel[] = { 255, 255, 255, 255 };
+                create_texture(0, white_pixel, Rml::Vector2i{ 1, 1 });
+            }
+            else if (texture == 1) {
+                Rml::byte transparent_pixel[] = { 0, 0, 0, 0 };
+                create_texture(1, transparent_pixel, Rml::Vector2i{ 1, 1 });
+            }
+            else {
+                assert(false && "Rendered without texture!");
+            }
+        }
+
+        // Copy the vertex and index data into the mapped buffers.
+        uint32_t vert_size_bytes = num_vertices * sizeof(*vertices);
+        uint32_t index_size_bytes = num_indices * sizeof(*indices);
+        uint32_t vertex_buffer_offset = allocate_dynamic_data(vertex_buffer_, vert_size_bytes);
+        uint32_t index_buffer_offset = allocate_dynamic_data(index_buffer_, index_size_bytes);
+        memcpy(vertex_buffer_.mapped_data_ + vertex_buffer_offset, vertices, vert_size_bytes);
+        memcpy(index_buffer_.mapped_data_ + index_buffer_offset, indices, index_size_bytes);
+
+        list_->setViewports(RT64::RenderViewport{ 0, 0, float(window_width_), float(window_height_) });
+        if (scissor_enabled_) {
+            list_->setScissors(RT64::RenderRect{
+                scissor_x_,
+                scissor_y_,
+                (scissor_width_ + scissor_x_),
+                (scissor_height_ + scissor_y_) });
+        }
+        else {
+            list_->setScissors(RT64::RenderRect{ 0, 0, window_width_, window_height_ });
+        }
+
+        RT64::RenderIndexBufferView index_view{index_buffer_.buffer_->at(index_buffer_offset), index_size_bytes, RT64::RenderFormat::R32_UINT};
+        list_->setIndexBuffer(&index_view);
+        RT64::RenderVertexBufferView vertex_view{vertex_buffer_.buffer_->at(vertex_buffer_offset), vert_size_bytes};
+        list_->setVertexBuffers(0, &vertex_view, 1, &vertex_slot_);
+
+        TextureHandle &texture_handle = textures_.at(texture);
+        if (!texture_handle.transitioned) {
+            // Prepare the texture for being read from a pixel shader.
+            list_->barriers(RT64::RenderBarrierStage::GRAPHICS, RT64::RenderTextureBarrier(texture_handle.texture.get(), RT64::RenderTextureLayout::SHADER_READ));
+            texture_handle.transitioned = true;
+        }
+
+        list_->setGraphicsDescriptorSet(texture_handle.set.get(), 1);
+
+        RmlPushConstants constants{
+            .transform = mvp_,
+            .translation = translation
+        };
+
+        list_->setGraphicsPushConstants(0, &constants);
+
+        list_->drawIndexedInstanced(num_indices, 1, 0, 0, 0);
+    }
+
+    void EnableScissorRegion(bool enable) override {
+        scissor_enabled_ = enable;
+    }
+
+    void SetScissorRegion(int x, int y, int width, int height) override {
+        scissor_x_ = x;
+        scissor_y_ = y;
+        scissor_width_ = width;
+        scissor_height_ = height;
+    }
+
+    bool LoadTexture(Rml::TextureHandle& texture_handle, Rml::Vector2i& texture_dimensions, const Rml::String& source) override {
+        flush_image_from_bytes_queue();
+
+        auto it = image_from_bytes_map.find(source);
+        if (it == image_from_bytes_map.end()) {
+            // Return a transparent texture if the image can't be found.
+            texture_handle = 1;
+            texture_dimensions.x = 1;
+            texture_dimensions.y = 1;
+            return true;
+        }
+        
+        // TODO: This data copy can be avoided when RT64::TextureCache::loadTextureFromBytes's function is updated to only take a pointer and size as the input.
+        std::vector<uint8_t> data_copy(it->second.data(), it->second.data() + it->second.size());
+        std::unique_ptr<RT64::RenderBuffer> texture_buffer;
+        copy_command_list_->begin();
+        RT64::Texture *texture = RT64::TextureCache::loadTextureFromBytes(device_, copy_command_list_.get(), data_copy, texture_buffer);
+        copy_command_list_->end();
+        copy_command_queue_->executeCommandLists(copy_command_list_.get(), copy_command_fence_.get());
+        copy_command_queue_->waitForCommandFence(copy_command_fence_.get());
+
+        if (texture == nullptr) {
+            return false;
+        }
+
+        texture_handle = texture_count_++;
+        texture_dimensions.x = texture->width;
+        texture_dimensions.y = texture->height;
+
+        std::unique_ptr<RT64::RenderDescriptorSet> set = texture_set_builder_->create(device_);
+        set->setTexture(gTexture_descriptor_index, texture->texture.get(), RT64::RenderTextureLayout::SHADER_READ);
+        textures_.emplace(texture_handle, TextureHandle{ std::move(texture->texture), std::move(set), false });
+        delete texture;
+
+        return true;
+    }
+
+    bool GenerateTexture(Rml::TextureHandle& texture_handle, const Rml::byte* source, const Rml::Vector2i& source_dimensions) override {
+        if (source_dimensions.x == 0 || source_dimensions.y == 0) {
+            texture_handle = 0;
+            return true;
+        }
+
+        texture_handle = texture_count_++;
+        return create_texture(texture_handle, source, source_dimensions);
+    }
+
+    bool create_texture(Rml::TextureHandle texture_handle, const Rml::byte* source, const Rml::Vector2i& source_dimensions, bool flip_y = false, bool bgra = false) {
+        std::unique_ptr<RT64::RenderTexture> texture =
+            device_->createTexture(RT64::RenderTextureDesc::Texture2D(source_dimensions.x, source_dimensions.y, 1, bgra ? RmlTextureFormatBgra : RmlTextureFormat));
+
+        if (texture != nullptr) {
+            uint32_t image_size_bytes = source_dimensions.x * source_dimensions.y * RmlTextureFormatBytesPerPixel;
+
+            // Calculate the texture padding for alignment purposes.
+            uint32_t row_pitch = source_dimensions.x * RmlTextureFormatBytesPerPixel;
+            uint32_t row_byte_width, row_byte_padding;
+            CalculateTextureRowWidthPadding(row_pitch, row_byte_width, row_byte_padding);
+            uint32_t row_width = row_byte_width / RmlTextureFormatBytesPerPixel;
+
+            // Calculate the real number of bytes to upload including padding.
+            uint32_t uploaded_size_bytes = row_byte_width * source_dimensions.y;
+
+            // Allocate room in the upload buffer for the uploaded data.
+            if (uploaded_size_bytes > copy_buffer_size_) {
+                copy_buffer_size_ = (uploaded_size_bytes * 3) / 2;
+                copy_buffer_ = device_->createBuffer(RT64::RenderBufferDesc::UploadBuffer(copy_buffer_size_));
+            }
+
+            // Copy the source data into the upload buffer.
+            uint8_t* dst_data = (uint8_t *)(copy_buffer_->map());
+            if (row_byte_padding == 0) {
+                // Copy row-by-row if the image is flipped.
+                if (flip_y) {
+                    for (int row = 0; row < source_dimensions.y; row++) {
+                        memcpy(dst_data + row_byte_width * (source_dimensions.y - row - 1), source + row_byte_width * row, row_byte_width);
+                    }
+                }
+                // Directly copy if no padding is needed and the image isn't flipped.
+                else {
+                    memcpy(dst_data, source, image_size_bytes);
+                }
+            }
+            // Otherwise pad each row as necessary.
+            else {
+                const Rml::byte *src_data = flip_y ? source + row_pitch * (source_dimensions.y - 1) : source;
+                uint32_t src_stride = flip_y ? -row_pitch : row_pitch;
+
+                for (int row = 0; row < source_dimensions.y; row++) {
+                    memcpy(dst_data, src_data, row_pitch);
+                    src_data += src_stride;
+                    dst_data += row_byte_width;
+                }
+            }
+
+            copy_buffer_->unmap();
+
+            // Reset the command list.
+            copy_command_list_->begin();
+
+            // Prepare the texture to be a destination for copying.
+            copy_command_list_->barriers(RT64::RenderBarrierStage::COPY, RT64::RenderTextureBarrier(texture.get(), RT64::RenderTextureLayout::COPY_DEST));
+            
+            // Copy the upload buffer into the texture.
+            copy_command_list_->copyTextureRegion(
+                RT64::RenderTextureCopyLocation::Subresource(texture.get()),
+                RT64::RenderTextureCopyLocation::PlacedFootprint(copy_buffer_.get(), RmlTextureFormat, source_dimensions.x, source_dimensions.y, 1, row_width));
+            
+            // End the command list, execute it and wait.
+            copy_command_list_->end();
+            copy_command_queue_->executeCommandLists(copy_command_list_.get(), copy_command_fence_.get());
+            copy_command_queue_->waitForCommandFence(copy_command_fence_.get());
+
+            // Create a descriptor set with this texture in it.
+            std::unique_ptr<RT64::RenderDescriptorSet> set = texture_set_builder_->create(device_);
+
+            set->setTexture(gTexture_descriptor_index, texture.get(), RT64::RenderTextureLayout::SHADER_READ);
+
+            textures_.emplace(texture_handle, TextureHandle{ std::move(texture), std::move(set), false });
+
+            return true;
+        }
+
+        return false;
+    }
+
+	void ReleaseTexture(Rml::TextureHandle texture) override {
+        if (texture > 1) {
+            // Textures #0 and #1 are reserved and should never be released.
+            textures_.erase(texture);
+        }
+    }
+
+    void SetTransform(const Rml::Matrix4f* transform) override {
+        transform_ = transform ? *transform : Rml::Matrix4f::Identity();
+        recalculate_mvp();
+    }
+
+    void recalculate_mvp() {
+        mvp_ = projection_mtx_ * transform_;
+    }
+
+    void start(RT64::RenderCommandList* list, int image_width, int image_height) {
+        list_ = list;
+
+        if (multisampling_.sampleCount > 1) {
+            if (window_width_ != image_width || window_height_ != image_height) {
+                screen_framebuffer_.reset();
+                screen_texture_ = device_->createTexture(RT64::RenderTextureDesc::ColorTarget(image_width, image_height, SwapChainFormat));
+                screen_texture_ms_ = device_->createTexture(RT64::RenderTextureDesc::ColorTarget(image_width, image_height, SwapChainFormat, multisampling_));
+                const RT64::RenderTexture *color_attachment = screen_texture_ms_.get();
+                screen_framebuffer_ = device_->createFramebuffer(RT64::RenderFramebufferDesc(&color_attachment, 1));
+                screen_descriptor_set_->setTexture(0, screen_texture_.get(), RT64::RenderTextureLayout::SHADER_READ);
+            }
+
+            list_->setPipeline(pipeline_ms_.get());
+        }
+        else {
+            list_->setPipeline(pipeline_.get());
+        }
+
+        list_->setGraphicsPipelineLayout(layout_.get());
+        // Bind the set for descriptors that don't change across draws
+        list_->setGraphicsDescriptorSet(sampler_set_.get(), 0);
+
+        window_width_ = image_width;
+        window_height_ = image_height;
+
+        projection_mtx_ = Rml::Matrix4f::ProjectOrtho(0.0f, float(image_width), float(image_height), 0.0f, -10000, 10000);
+        recalculate_mvp();
+
+        // The following code assumes command lists aren't double buffered.
+        // Clear out any stale buffers from the last command list.
+        stale_buffers_.clear();
+
+        // Reset buffers.
+        reset_dynamic_buffer(upload_buffer_);
+        reset_dynamic_buffer(vertex_buffer_);
+        reset_dynamic_buffer(index_buffer_);
+
+        // Set an internal texture as the render target if MSAA is enabled.
+        if (multisampling_.sampleCount > 1) {
+            list->barriers(RT64::RenderBarrierStage::GRAPHICS, RT64::RenderTextureBarrier(screen_texture_ms_.get(), RT64::RenderTextureLayout::COLOR_WRITE));
+            list->setFramebuffer(screen_framebuffer_.get());
+            list->clearColor(0, RT64::RenderColor(0.0f, 0.0f, 0.0f, 0.0f));
+        }
+    }
+
+    void end(RT64::RenderCommandList* list, RT64::RenderFramebuffer* framebuffer) {
+        // Draw the texture were rendered the UI in to the swap chain framebuffer if MSAA is enabled.
+        if (multisampling_.sampleCount > 1) {
+            RT64::RenderTextureBarrier before_resolve_barriers[] = {
+                RT64::RenderTextureBarrier(screen_texture_ms_.get(), RT64::RenderTextureLayout::RESOLVE_SOURCE),
+                RT64::RenderTextureBarrier(screen_texture_.get(), RT64::RenderTextureLayout::RESOLVE_DEST)
+            };
+
+            list->barriers(RT64::RenderBarrierStage::COPY, before_resolve_barriers, uint32_t(std::size(before_resolve_barriers)));
+            list->resolveTexture(screen_texture_.get(), screen_texture_ms_.get());
+            list->barriers(RT64::RenderBarrierStage::GRAPHICS, RT64::RenderTextureBarrier(screen_texture_.get(), RT64::RenderTextureLayout::SHADER_READ));
+            list->setFramebuffer(framebuffer);
+            list->setPipeline(pipeline_.get());
+            list->setGraphicsPipelineLayout(layout_.get());
+            list->setGraphicsDescriptorSet(sampler_set_.get(), 0);
+            list->setGraphicsDescriptorSet(screen_descriptor_set_.get(), 1);
+            RT64::RenderVertexBufferView vertex_view(screen_vertex_buffer_.get(), screen_vertex_buffer_size_);
+            list->setVertexBuffers(0, &vertex_view, 1, &vertex_slot_);
+
+            RmlPushConstants constants{
+                .transform = Rml::Matrix4f::Identity(),
+                .translation = Rml::Vector2f(0.0f, 0.0f)
+            };
+
+            list_->setGraphicsPushConstants(0, &constants);
+            list->drawInstanced(3, 1, 0, 0);
+        }
+
+        end_dynamic_buffer(upload_buffer_);
+        end_dynamic_buffer(vertex_buffer_);
+        end_dynamic_buffer(index_buffer_);
+
+        list_ = nullptr;
+    }
+
+    void queue_image_from_bytes(const std::string &src, const std::vector<char> &bytes) {
+        image_from_bytes_queue.enqueue(ImageFromBytes(src, bytes));
+    }
+
+    void flush_image_from_bytes_queue() {
+        ImageFromBytes image_from_bytes;
+        while (image_from_bytes_queue.try_dequeue(image_from_bytes)) {
+            image_from_bytes_map.emplace(image_from_bytes.first, std::move(image_from_bytes.second));
+        }
+    }
+};
+} // namespace recompui
+
+recompui::RmlRenderInterface_RT64::RmlRenderInterface_RT64() = default;
+recompui::RmlRenderInterface_RT64::~RmlRenderInterface_RT64() = default;
+
+void recompui::RmlRenderInterface_RT64::reset() {
+    impl.reset();
+}
+
+void recompui::RmlRenderInterface_RT64::init(RT64::RenderInterface* interface, RT64::RenderDevice* device) {
+    impl = std::make_unique<RmlRenderInterface_RT64_impl>(interface, device);
+}
+
+Rml::RenderInterface* recompui::RmlRenderInterface_RT64::get_rml_interface() {
+    if (impl) {
+        return impl->GetAdaptedInterface();
+    }
+    return nullptr;
+}
+
+void recompui::RmlRenderInterface_RT64::start(RT64::RenderCommandList* list, int image_width, int image_height) {
+    assert(static_cast<bool>(impl));
+
+    impl->start(list, image_width, image_height);
+}
+
+void recompui::RmlRenderInterface_RT64::end(RT64::RenderCommandList* list, RT64::RenderFramebuffer* framebuffer) {
+    assert(static_cast<bool>(impl));
+
+    impl->end(list, framebuffer);
+}
+
+void recompui::RmlRenderInterface_RT64::queue_image_from_bytes(const std::string &src, const std::vector<char> &bytes) {
+    assert(static_cast<bool>(impl));
+
+    impl->queue_image_from_bytes(src, bytes);
+}