/*
 * Copyright 2020-2021 Zebediah Figura for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include <assert.h>
#define COBJMACROS
#define CONST_VTABLE
#define VKD3D_TEST_NO_DEFS
#include "d3d12_crosstest.h"
#include "shader_runner.h"

struct d3d12_resource
{
    struct resource r;

    D3D12_DESCRIPTOR_RANGE descriptor_range;
    ID3D12Resource *resource;
    unsigned int root_index;
};

static struct d3d12_resource *d3d12_resource(struct resource *r)
{
    return CONTAINING_RECORD(r, struct d3d12_resource, r);
}

struct d3d12_shader_runner
{
    struct shader_runner r;

    struct test_context test_context;

    ID3D12DescriptorHeap *heap;
};

static struct d3d12_shader_runner *d3d12_shader_runner(struct shader_runner *r)
{
    return CONTAINING_RECORD(r, struct d3d12_shader_runner, r);
}

static ID3D10Blob *compile_shader(const struct d3d12_shader_runner *runner, const char *source, const char *type)
{
    ID3D10Blob *blob = NULL, *errors = NULL;
    char profile[7];
    HRESULT hr;

    static const char *const shader_models[] =
    {
        [SHADER_MODEL_2_0] = "4_0",
        [SHADER_MODEL_4_0] = "4_0",
        [SHADER_MODEL_4_1] = "4_1",
        [SHADER_MODEL_5_0] = "5_0",
        [SHADER_MODEL_5_1] = "5_1",
    };

    sprintf(profile, "%s_%s", type, shader_models[runner->r.minimum_shader_model]);
    hr = D3DCompile(source, strlen(source), NULL, NULL, NULL, "main", profile, 0, 0, &blob, &errors);
    ok(FAILED(hr) == !blob, "Got unexpected hr %#x, blob %p.\n", hr, blob);
    if (errors)
    {
        if (vkd3d_test_state.debug_level)
            trace("%s\n", (char *)ID3D10Blob_GetBufferPointer(errors));
        ID3D10Blob_Release(errors);
    }
    return blob;
}

#define MAX_RESOURCE_DESCRIPTORS 256

static struct resource *d3d12_runner_create_resource(struct shader_runner *r, const struct resource_params *params)
{
    struct d3d12_shader_runner *runner = d3d12_shader_runner(r);
    struct test_context *test_context = &runner->test_context;
    ID3D12Device *device = test_context->device;
    D3D12_SUBRESOURCE_DATA resource_data;
    struct d3d12_resource *resource;

    resource = calloc(1, sizeof(*resource));
    resource->r.slot = params->slot;
    resource->r.type = params->type;
    resource->r.size = params->data_size;

    switch (params->type)
    {
        case RESOURCE_TYPE_TEXTURE:
            if (!runner->heap)
                runner->heap = create_gpu_descriptor_heap(device,
                        D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV, MAX_RESOURCE_DESCRIPTORS);

            if (params->slot >= MAX_RESOURCE_DESCRIPTORS)
                fatal_error("Resource slot %u is too high; please increase MAX_RESOURCE_DESCRIPTORS.\n", params->slot);

            resource->resource = create_default_texture(device, params->width, params->height,
                    params->format, 0, D3D12_RESOURCE_STATE_COPY_DEST);
            resource_data.pData = params->data;
            resource_data.SlicePitch = resource_data.RowPitch = params->width * params->texel_size;
            upload_texture_data(resource->resource, &resource_data, 1, test_context->queue, test_context->list);
            reset_command_list(test_context->list, test_context->allocator);
            transition_resource_state(test_context->list, resource->resource, D3D12_RESOURCE_STATE_COPY_DEST,
                    D3D12_RESOURCE_STATE_NON_PIXEL_SHADER_RESOURCE | D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE);
            ID3D12Device_CreateShaderResourceView(device, resource->resource,
                    NULL, get_cpu_descriptor_handle(test_context, runner->heap, resource->r.slot));
            break;

        case RESOURCE_TYPE_VERTEX_BUFFER:
            resource->resource = create_upload_buffer(device, params->data_size, params->data);
            break;
    }

    return &resource->r;
}

static void d3d12_runner_destroy_resource(struct shader_runner *r, struct resource *res)
{
    struct d3d12_resource *resource = d3d12_resource(res);

    ID3D12Resource_Release(resource->resource);
    free(resource);
}

static bool d3d12_runner_draw(struct shader_runner *r,
        D3D_PRIMITIVE_TOPOLOGY primitive_topology, unsigned int vertex_count)
{
    struct d3d12_shader_runner *runner = d3d12_shader_runner(r);
    struct test_context *test_context = &runner->test_context;

    ID3D12GraphicsCommandList *command_list = test_context->list;
    D3D12_ROOT_SIGNATURE_DESC root_signature_desc = {0};
    D3D12_ROOT_PARAMETER root_params[3], *root_param;
    ID3D12CommandQueue *queue = test_context->queue;
    D3D12_INPUT_ELEMENT_DESC *input_element_descs;
    D3D12_STATIC_SAMPLER_DESC static_samplers[1];
    ID3D12Device *device = test_context->device;
    D3D12_INPUT_LAYOUT_DESC input_layout;
    static const float clear_color[4];
    ID3D10Blob *vs_code, *ps_code;
    D3D12_SHADER_BYTECODE vs, ps;
    unsigned int uniform_index;
    ID3D12PipelineState *pso;
    HRESULT hr;
    size_t i;

    ps_code = compile_shader(runner, runner->r.ps_source, "ps");
    vs_code = compile_shader(runner, runner->r.vs_source, "vs");
    todo_if (runner->r.is_todo) ok(ps_code && vs_code, "Failed to compile shaders.\n");

    if (!ps_code || !vs_code)
    {
        if (ps_code)
            ID3D10Blob_Release(ps_code);
        if (vs_code)
            ID3D10Blob_Release(vs_code);
        return false;
    }

    root_signature_desc.NumParameters = 0;
    root_signature_desc.pParameters = root_params;
    root_signature_desc.NumStaticSamplers = 0;
    root_signature_desc.pStaticSamplers = static_samplers;
    root_signature_desc.Flags = D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT;

    if (runner->r.uniform_count)
    {
        uniform_index = root_signature_desc.NumParameters++;
        root_param = &root_params[uniform_index];
        root_param->ParameterType = D3D12_ROOT_PARAMETER_TYPE_32BIT_CONSTANTS;
        root_param->Constants.ShaderRegister = 0;
        root_param->Constants.RegisterSpace = 0;
        root_param->Constants.Num32BitValues = runner->r.uniform_count;
        root_param->ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL;
    }

    for (i = 0; i < runner->r.resource_count; ++i)
    {
        struct d3d12_resource *resource = d3d12_resource(runner->r.resources[i]);
        D3D12_DESCRIPTOR_RANGE *range;

        switch (resource->r.type)
        {
            case RESOURCE_TYPE_TEXTURE:
                range = &resource->descriptor_range;

                resource->root_index = root_signature_desc.NumParameters++;
                root_param = &root_params[resource->root_index];
                root_param->ParameterType = D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE;
                root_param->DescriptorTable.NumDescriptorRanges = 1;
                root_param->DescriptorTable.pDescriptorRanges = range;
                root_param->ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL;

                range->RangeType = D3D12_DESCRIPTOR_RANGE_TYPE_SRV;
                range->NumDescriptors = 1;
                range->BaseShaderRegister = resource->r.slot;
                range->RegisterSpace = 0;
                range->OffsetInDescriptorsFromTableStart = 0;
                break;

            case RESOURCE_TYPE_VERTEX_BUFFER:
                break;
        }
    }

    assert(root_signature_desc.NumParameters <= ARRAY_SIZE(root_params));

    for (i = 0; i < runner->r.sampler_count; ++i)
    {
        D3D12_STATIC_SAMPLER_DESC *sampler_desc = &static_samplers[root_signature_desc.NumStaticSamplers++];
        const struct sampler *sampler = &runner->r.samplers[i];

        memset(sampler_desc, 0, sizeof(*sampler_desc));
        sampler_desc->Filter = sampler->filter;
        sampler_desc->AddressU = sampler->u_address;
        sampler_desc->AddressV = sampler->v_address;
        sampler_desc->AddressW = sampler->w_address;
        sampler_desc->ShaderRegister = sampler->slot;
        sampler_desc->RegisterSpace = 0;
        sampler_desc->ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL;
    }

    if (test_context->root_signature)
        ID3D12RootSignature_Release(test_context->root_signature);
    hr = create_root_signature(device, &root_signature_desc, &test_context->root_signature);
    ok(hr == S_OK, "Failed to create root signature, hr %#x.\n", hr);

    input_element_descs = calloc(runner->r.input_element_count, sizeof(*input_element_descs));
    for (i = 0; i < runner->r.input_element_count; ++i)
    {
        const struct input_element *element = &runner->r.input_elements[i];
        D3D12_INPUT_ELEMENT_DESC *desc = &input_element_descs[i];

        desc->SemanticName = element->name;
        desc->SemanticIndex = element->index;
        desc->Format = element->format;
        desc->InputSlot = element->slot;
        desc->AlignedByteOffset = D3D12_APPEND_ALIGNED_ELEMENT;
        desc->InputSlotClass = D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA;
    }

    input_layout.pInputElementDescs = input_element_descs;
    input_layout.NumElements = runner->r.input_element_count;

    vs.pShaderBytecode = ID3D10Blob_GetBufferPointer(vs_code);
    vs.BytecodeLength = ID3D10Blob_GetBufferSize(vs_code);
    ps.pShaderBytecode = ID3D10Blob_GetBufferPointer(ps_code);
    ps.BytecodeLength = ID3D10Blob_GetBufferSize(ps_code);
    pso = create_pipeline_state(device, test_context->root_signature,
            test_context->render_target_desc.Format, &vs, &ps, &input_layout);
    ID3D10Blob_Release(vs_code);
    ID3D10Blob_Release(ps_code);
    free(input_element_descs);
    vkd3d_array_reserve((void **)&test_context->pso, &test_context->pso_capacity,
            test_context->pso_count + 1, sizeof(*test_context->pso));
    test_context->pso[test_context->pso_count++] = pso;

    ID3D12GraphicsCommandList_SetGraphicsRootSignature(command_list, test_context->root_signature);
    if (runner->r.uniform_count)
        ID3D12GraphicsCommandList_SetGraphicsRoot32BitConstants(command_list, uniform_index,
                runner->r.uniform_count, runner->r.uniforms, 0);
    for (i = 0; i < runner->r.resource_count; ++i)
    {
        struct d3d12_resource *resource = d3d12_resource(runner->r.resources[i]);
        D3D12_VERTEX_BUFFER_VIEW vbv;

        switch (resource->r.type)
        {
            case RESOURCE_TYPE_TEXTURE:
                ID3D12GraphicsCommandList_SetGraphicsRootDescriptorTable(command_list, resource->root_index,
                        get_gpu_descriptor_handle(test_context, runner->heap, resource->r.slot));
                break;

            case RESOURCE_TYPE_VERTEX_BUFFER:
                vbv.BufferLocation = ID3D12Resource_GetGPUVirtualAddress(resource->resource);
                vbv.StrideInBytes = get_vb_stride(&runner->r, resource->r.slot);
                vbv.SizeInBytes = resource->r.size;

                ID3D12GraphicsCommandList_IASetVertexBuffers(command_list, resource->r.slot, 1, &vbv);
                break;
        }
    }

    ID3D12GraphicsCommandList_OMSetRenderTargets(command_list, 1, &test_context->rtv, false, NULL);
    ID3D12GraphicsCommandList_RSSetScissorRects(command_list, 1, &test_context->scissor_rect);
    ID3D12GraphicsCommandList_RSSetViewports(command_list, 1, &test_context->viewport);
    ID3D12GraphicsCommandList_IASetPrimitiveTopology(command_list, primitive_topology);
    ID3D12GraphicsCommandList_ClearRenderTargetView(command_list, test_context->rtv, clear_color, 0, NULL);
    ID3D12GraphicsCommandList_SetPipelineState(command_list, pso);
    ID3D12GraphicsCommandList_DrawInstanced(command_list, vertex_count, 1, 0, 0);

    /* Finish the command list so that we can destroy objects. */
    hr = ID3D12GraphicsCommandList_Close(command_list);
    ok(hr == S_OK, "Failed to close command list, hr %#x.\n", hr);
    exec_command_list(queue, command_list);
    wait_queue_idle(device, queue);
    reset_command_list(command_list, test_context->allocator);

    return true;
}

static void d3d12_runner_probe_vec4(struct shader_runner *r,
        const RECT *rect, const struct vec4 *v, unsigned int ulps)
{
    struct d3d12_shader_runner *runner = d3d12_shader_runner(r);
    struct test_context *test_context = &runner->test_context;
    struct d3d12_resource_readback rb;

    transition_resource_state(test_context->list, test_context->render_target,
            D3D12_RESOURCE_STATE_RENDER_TARGET, D3D12_RESOURCE_STATE_COPY_SOURCE);
    get_texture_readback_with_command_list(test_context->render_target, 0, &rb,
            test_context->queue, test_context->list);
    todo_if (runner->r.is_todo) check_readback_data_vec4(&rb.rb, rect, v, ulps);
    release_resource_readback(&rb);
    reset_command_list(test_context->list, test_context->allocator);
    transition_resource_state(test_context->list, test_context->render_target,
            D3D12_RESOURCE_STATE_COPY_SOURCE, D3D12_RESOURCE_STATE_RENDER_TARGET);
}

static const struct shader_runner_ops d3d12_runner_ops =
{
    .create_resource = d3d12_runner_create_resource,
    .destroy_resource = d3d12_runner_destroy_resource,
    .draw = d3d12_runner_draw,
    .probe_vec4 = d3d12_runner_probe_vec4,
};

void run_shader_tests_d3d12(int argc, char **argv)
{
    static const struct test_context_desc desc =
    {
        .rt_width = RENDER_TARGET_WIDTH,
        .rt_height = RENDER_TARGET_HEIGHT,
        .no_root_signature = true,
        .rt_format = DXGI_FORMAT_R32G32B32A32_FLOAT,
    };
    struct d3d12_shader_runner runner = {0};

    parse_args(argc, argv);
    enable_d3d12_debug_layer(argc, argv);
    init_adapter_info();
    init_test_context(&runner.test_context, &desc);

    run_shader_tests(&runner.r, argc, argv, &d3d12_runner_ops);

    if (runner.heap)
        ID3D12DescriptorHeap_Release(runner.heap);
    destroy_test_context(&runner.test_context);
}