RetroArch/gfx/drivers/d3d11.c

/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2014-2018 - Ali Bouhlel
 *
 *  RetroArch is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  RetroArch 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with RetroArch.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#include <assert.h>

#include <string/stdstring.h>
#include <gfx/scaler/pixconv.h>

#include "../../driver.h"
#include "../../verbosity.h"
#include "../configuration.h"
#include "../video_driver.h"
#include "../common/win32_common.h"
#include "../common/d3d11_common.h"
#include "../common/dxgi_common.h"
#include "../common/d3dcompiler_common.h"
#include "../../performance_counters.h"

static void*
d3d11_gfx_init(const video_info_t* video, const input_driver_t** input, void** input_data)
{
   WNDCLASSEX      wndclass = { 0 };
   settings_t*     settings = config_get_ptr();
   gfx_ctx_input_t inp      = { input, input_data };
   d3d11_video_t*  d3d11    = (d3d11_video_t*)calloc(1, sizeof(*d3d11));

   if (!d3d11)
      return NULL;

   win32_window_reset();
   win32_monitor_init();
   wndclass.lpfnWndProc = WndProcD3D;
   win32_window_init(&wndclass, true, NULL);

   if (!win32_set_video_mode(d3d11, video->width, video->height, video->fullscreen))
   {
      RARCH_ERR("[D3D11]: win32_set_video_mode failed.\n");
      goto error;
   }

   gfx_ctx_d3d.input_driver(NULL, settings->arrays.input_joypad_driver, input, input_data);

   {
      UINT                 flags                   = 0;
      D3D_FEATURE_LEVEL    requested_feature_level = D3D_FEATURE_LEVEL_11_0;
      DXGI_SWAP_CHAIN_DESC desc                    = {
         .BufferCount                        = 1,
         .BufferDesc.Width                   = video->width,
         .BufferDesc.Height                  = video->height,
         .BufferDesc.Format                  = DXGI_FORMAT_R8G8B8A8_UNORM,
         .BufferDesc.RefreshRate.Numerator   = 60,
         .BufferDesc.RefreshRate.Denominator = 1,
         .BufferUsage                        = DXGI_USAGE_RENDER_TARGET_OUTPUT,
         .OutputWindow                       = main_window.hwnd,
         .SampleDesc.Count                   = 1,
         .SampleDesc.Quality                 = 0,
         .Windowed                           = TRUE,
         .SwapEffect                         = DXGI_SWAP_EFFECT_SEQUENTIAL,
#if 0
         .SwapEffect                         = DXGI_SWAP_EFFECT_DISCARD,
         .SwapEffect                         = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL,
         .SwapEffect                         = DXGI_SWAP_EFFECT_FLIP_DISCARD,
#endif
      };

#ifdef DEBUG
      flags |= D3D11_CREATE_DEVICE_DEBUG;
#endif

      D3D11CreateDeviceAndSwapChain(
            NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, flags, &requested_feature_level, 1,
            D3D11_SDK_VERSION, &desc, (IDXGISwapChain**)&d3d11->swapChain, &d3d11->device,
            &d3d11->supportedFeatureLevel, &d3d11->ctx);
   }

   {
      D3D11Texture2D backBuffer;
      DXGIGetSwapChainBufferD3D11(d3d11->swapChain, 0, &backBuffer);
      D3D11CreateTexture2DRenderTargetView(
            d3d11->device, backBuffer, NULL, &d3d11->renderTargetView);
      Release(backBuffer);
   }

   D3D11SetRenderTargets(d3d11->ctx, 1, &d3d11->renderTargetView, NULL);

   {
      D3D11_VIEWPORT vp = { 0, 0, video->width, video->height, 0.0f, 1.0f };
      D3D11SetViewports(d3d11->ctx, 1, &vp);
   }

   d3d11->vsync  = video->vsync;
   d3d11->format = video->rgb32 ? DXGI_FORMAT_B8G8R8X8_UNORM : DXGI_FORMAT_B5G6R5_UNORM;

   d3d11->frame.texture.desc.Format =
         d3d11_get_closest_match_texture2D(d3d11->device, d3d11->format);
   d3d11->frame.texture.desc.Usage = D3D11_USAGE_DEFAULT;

   d3d11->menu.texture.desc.Format = DXGI_FORMAT_B4G4R4A4_UNORM;
   d3d11->menu.texture.desc.Usage  = D3D11_USAGE_DEFAULT;

   {
      D3D11_SAMPLER_DESC desc = {
         .Filter         = D3D11_FILTER_MIN_MAG_MIP_POINT,
         .AddressU       = D3D11_TEXTURE_ADDRESS_BORDER,
         .AddressV       = D3D11_TEXTURE_ADDRESS_BORDER,
         .AddressW       = D3D11_TEXTURE_ADDRESS_BORDER,
         .MaxAnisotropy  = 1,
         .ComparisonFunc = D3D11_COMPARISON_NEVER,
         .MinLOD         = -D3D11_FLOAT32_MAX,
         .MaxLOD         = D3D11_FLOAT32_MAX,
      };
      D3D11CreateSamplerState(d3d11->device, &desc, &d3d11->sampler_nearest);

      desc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
      D3D11CreateSamplerState(d3d11->device, &desc, &d3d11->sampler_linear);
   }

   {
      d3d11_vertex_t vertices[] = {
         { { -1.0f, -1.0f }, { 0.0f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f } },
         { { -1.0f, 1.0f }, { 0.0f, 0.0f }, { 1.0f, 1.0f, 1.0f, 1.0f } },
         { { 1.0f, -1.0f }, { 1.0f, 1.0f }, { 1.0f, 1.0f, 1.0f, 1.0f } },
         { { 1.0f, 1.0f }, { 1.0f, 0.0f }, { 1.0f, 1.0f, 1.0f, 1.0f } },
      };

      {
         D3D11_BUFFER_DESC desc = {
            .Usage               = D3D11_USAGE_DYNAMIC,
            .ByteWidth           = sizeof(vertices),
            .BindFlags           = D3D11_BIND_VERTEX_BUFFER,
            .StructureByteStride = 0, /* sizeof(Vertex) ? */
            .CPUAccessFlags      = D3D11_CPU_ACCESS_WRITE,
         };
         D3D11_SUBRESOURCE_DATA vertexData = { vertices };
         D3D11CreateBuffer(d3d11->device, &desc, &vertexData, &d3d11->frame.vbo);
         desc.Usage          = D3D11_USAGE_IMMUTABLE;
         desc.CPUAccessFlags = 0;

         D3D11CreateBuffer(d3d11->device, &desc, &vertexData, &d3d11->menu.vbo);
      }
      D3D11SetPrimitiveTopology(d3d11->ctx, D3D11_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
   }

   {
      D3DBlob vs_code;
      D3DBlob ps_code;

      static const char stock[] =
#include "d3d_shaders/opaque_sm5.hlsl.h"
            ;

      D3D11_INPUT_ELEMENT_DESC desc[] = {
         { "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT, 0, offsetof(d3d11_vertex_t, position),
           D3D11_INPUT_PER_VERTEX_DATA, 0 },
         { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, offsetof(d3d11_vertex_t, texcoord),
           D3D11_INPUT_PER_VERTEX_DATA, 0 },
         { "COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, offsetof(d3d11_vertex_t, color),
           D3D11_INPUT_PER_VERTEX_DATA, 0 },
      };

      d3d_compile(stock, sizeof(stock), "VSMain", "vs_5_0", &vs_code);
      d3d_compile(stock, sizeof(stock), "PSMain", "ps_5_0", &ps_code);

      D3D11CreateVertexShader(
            d3d11->device, D3DGetBufferPointer(vs_code), D3DGetBufferSize(vs_code), NULL,
            &d3d11->vs);
      D3D11CreatePixelShader(
            d3d11->device, D3DGetBufferPointer(ps_code), D3DGetBufferSize(ps_code), NULL,
            &d3d11->ps);
      D3D11CreateInputLayout(
            d3d11->device, desc, countof(desc), D3DGetBufferPointer(vs_code),
            D3DGetBufferSize(vs_code), &d3d11->layout);

      Release(vs_code);
      Release(ps_code);
   }

   D3D11SetInputLayout(d3d11->ctx, d3d11->layout);
   D3D11SetVShader(d3d11->ctx, d3d11->vs, NULL, 0);
   D3D11SetPShader(d3d11->ctx, d3d11->ps, NULL, 0);

   {
      D3D11_BLEND_DESC blend_desc = {
         .AlphaToCoverageEnable  = FALSE,
         .IndependentBlendEnable = FALSE,
         .RenderTarget[0] =
               {
                     .BlendEnable = TRUE,
                     D3D11_BLEND_SRC_ALPHA,
                     D3D11_BLEND_INV_SRC_ALPHA,
                     D3D11_BLEND_OP_ADD,
                     D3D11_BLEND_SRC_ALPHA,
                     D3D11_BLEND_INV_SRC_ALPHA,
                     D3D11_BLEND_OP_ADD,
                     D3D11_COLOR_WRITE_ENABLE_ALL,
               },
      };
      D3D11CreateBlendState(d3d11->device, &blend_desc, &d3d11->blend_enable);
      blend_desc.RenderTarget[0].BlendEnable = FALSE;
      D3D11CreateBlendState(d3d11->device, &blend_desc, &d3d11->blend_disable);
   }

   return d3d11;

error:
   free(d3d11);
   return NULL;
}

static bool d3d11_gfx_frame(
      void*               data,
      const void*         frame,
      unsigned            width,
      unsigned            height,
      uint64_t            frame_count,
      unsigned            pitch,
      const char*         msg,
      video_frame_info_t* video_info)
{
   d3d11_video_t* d3d11 = (d3d11_video_t*)data;

   if (d3d11->need_resize)
   {
      D3D11Texture2D backBuffer;
      D3D11_VIEWPORT vp = { 0, 0, video_info->width, video_info->height, 0.0f, 1.0f };

      Release(d3d11->renderTargetView);
      DXGIResizeBuffers(d3d11->swapChain, 0, 0, 0, 0, 0);

      DXGIGetSwapChainBufferD3D11(d3d11->swapChain, 0, &backBuffer);
      D3D11CreateTexture2DRenderTargetView(d3d11->device, backBuffer, NULL, &d3d11->renderTargetView);
      Release(backBuffer);

      D3D11SetRenderTargets(d3d11->ctx, 1, &d3d11->renderTargetView, NULL);
      D3D11SetViewports(d3d11->ctx, 1, &vp);

      d3d11->need_resize = false;
   }

   PERF_START();
   D3D11ClearRenderTargetView(d3d11->ctx, d3d11->renderTargetView, d3d11->clearcolor);

   if (frame && width && height)
   {
      D3D11_BOX frame_box = { 0, 0, 0, width, height, 1 };

      if (d3d11->frame.texture.desc.Width != width || d3d11->frame.texture.desc.Height != height)
      {
         d3d11->frame.texture.desc.Width  = width;
         d3d11->frame.texture.desc.Height = height;
         d3d11_init_texture(d3d11->device, &d3d11->frame.texture);
      }

      d3d11_update_texture(
            d3d11->ctx, width, height, pitch, d3d11->format, frame, &d3d11->frame.texture);
      D3D11CopyTexture2DSubresourceRegion(
            d3d11->ctx, d3d11->frame.texture.handle, 0, 0, 0, 0, d3d11->frame.texture.staging, 0,
            &frame_box);
   }

   {
      UINT stride = sizeof(d3d11_vertex_t);
      UINT offset = 0;
      D3D11SetVertexBuffers(d3d11->ctx, 0, 1, &d3d11->frame.vbo, &stride, &offset);
      D3D11SetPShaderResources(d3d11->ctx, 0, 1, &d3d11->frame.texture.view);
      D3D11SetPShaderSamplers(d3d11->ctx, 0, 1, &d3d11->sampler_linear);

      D3D11SetBlendState(d3d11->ctx, d3d11->blend_disable, NULL, D3D11_DEFAULT_SAMPLE_MASK);
      D3D11Draw(d3d11->ctx, 4, 0);
      D3D11SetBlendState(d3d11->ctx, d3d11->blend_enable, NULL, D3D11_DEFAULT_SAMPLE_MASK);

      if (d3d11->menu.enabled && d3d11->menu.texture.handle)
      {
         if (d3d11->menu.texture.dirty)
            D3D11CopyTexture2DSubresourceRegion(
                  d3d11->ctx, d3d11->menu.texture.handle, 0, 0, 0, 0, d3d11->menu.texture.staging,
                  0, NULL);

         D3D11SetVertexBuffers(d3d11->ctx, 0, 1, &d3d11->menu.vbo, &stride, &offset);
         D3D11SetPShaderResources(d3d11->ctx, 0, 1, &d3d11->menu.texture.view);
         D3D11SetPShaderSamplers(d3d11->ctx, 0, 1, &d3d11->sampler_linear);

         D3D11Draw(d3d11->ctx, 4, 0);
      }
   }

   DXGIPresent(d3d11->swapChain, !!d3d11->vsync, 0);
   PERF_STOP();

   if (msg && *msg)
      gfx_ctx_d3d.update_window_title(NULL, video_info);

   return true;
}

static void d3d11_gfx_set_nonblock_state(void* data, bool toggle)
{
   d3d11_video_t* d3d11 = (d3d11_video_t*)data;

   if (!d3d11)
      return;

   d3d11->vsync = !toggle;
}

static bool d3d11_gfx_alive(void* data)
{
   bool     quit;
   bool     resize;
   unsigned width;
   unsigned height;

   d3d11_video_t* d3d11 = (d3d11_video_t*)data;

   win32_check_window(&quit, &d3d11->need_resize, &width, &height);

   if (width != 0 && height != 0)
      video_driver_set_size(&width, &height);

   return !quit;
}

static bool d3d11_gfx_focus(void* data) { return win32_has_focus(); }

static bool d3d11_gfx_suppress_screensaver(void* data, bool enable)
{
   (void)data;
   (void)enable;
   return false;
}

static bool d3d11_gfx_has_windowed(void* data)
{
   (void)data;
   return true;
}

static void d3d11_gfx_free(void* data)
{
   d3d11_video_t* d3d11 = (d3d11_video_t*)data;

   if (!d3d11)
      return;

   Release(d3d11->frame.texture.view);
   Release(d3d11->frame.texture.handle);
   Release(d3d11->frame.texture.staging);
   Release(d3d11->frame.vbo);

   Release(d3d11->menu.texture.handle);
   Release(d3d11->menu.texture.staging);
   Release(d3d11->menu.texture.view);
   Release(d3d11->menu.vbo);

   Release(d3d11->blend_enable);
   Release(d3d11->blend_disable);
   Release(d3d11->sampler_nearest);
   Release(d3d11->sampler_linear);
   Release(d3d11->ps);
   Release(d3d11->vs);
   Release(d3d11->layout);
   Release(d3d11->renderTargetView);
   Release(d3d11->swapChain);
   Release(d3d11->ctx);
   Release(d3d11->device);

   win32_monitor_from_window();
   win32_destroy_window();
   free(d3d11);
}

static bool d3d11_gfx_set_shader(void* data, enum rarch_shader_type type, const char* path)
{
   (void)data;
   (void)type;
   (void)path;

   return false;
}

static void d3d11_gfx_set_rotation(void* data, unsigned rotation)
{
   (void)data;
   (void)rotation;
}

static void d3d11_gfx_viewport_info(void* data, struct video_viewport* vp)
{
   (void)data;
   (void)vp;
}

static bool d3d11_gfx_read_viewport(void* data, uint8_t* buffer, bool is_idle)
{
   (void)data;
   (void)buffer;

   return true;
}

static void d3d11_set_menu_texture_frame(
      void* data, const void* frame, bool rgb32, unsigned width, unsigned height, float alpha)
{
   d3d11_video_t* d3d11  = (d3d11_video_t*)data;
   int            pitch  = width * (rgb32 ? sizeof(uint32_t) : sizeof(uint16_t));
   DXGI_FORMAT    format = rgb32 ? DXGI_FORMAT_B8G8R8A8_UNORM : DXGI_FORMAT_EX_A4R4G4B4_UNORM;

   if (d3d11->menu.texture.desc.Width != width || d3d11->menu.texture.desc.Height != height)
   {
      d3d11->menu.texture.desc.Format = d3d11_get_closest_match_texture2D(d3d11->device, format);
      d3d11->menu.texture.desc.Width  = width;
      d3d11->menu.texture.desc.Height = height;
      d3d11_init_texture(d3d11->device, &d3d11->menu.texture);
   }

   d3d11_update_texture(d3d11->ctx, width, height, pitch, format, frame, &d3d11->menu.texture);
}
static void d3d11_set_menu_texture_enable(void* data, bool state, bool full_screen)
{
   d3d11_video_t* d3d11 = (d3d11_video_t*)data;

   if (!d3d11)
      return;

   d3d11->menu.enabled    = state;
   d3d11->menu.fullscreen = full_screen;
}

static const video_poke_interface_t d3d11_poke_interface = {
   NULL,                          /* set_coords */
   NULL,                          /* set_mvp */
   NULL,                          /* load_texture */
   NULL,                          /* unload_texture */
   NULL,                          /* set_video_mode */
   NULL,                          /* set_filtering */
   NULL,                          /* get_video_output_size */
   NULL,                          /* get_video_output_prev */
   NULL,                          /* get_video_output_next */
   NULL,                          /* get_current_framebuffer */
   NULL,                          /* get_proc_address */
   NULL,                          /* set_aspect_ratio */
   NULL,                          /* apply_state_changes */
   d3d11_set_menu_texture_frame,  /* set_texture_frame */
   d3d11_set_menu_texture_enable, /* set_texture_enable */
   NULL,                          /* set_osd_msg */
   NULL,                          /* show_mouse */
   NULL,                          /* grab_mouse_toggle */
   NULL,                          /* get_current_shader */
   NULL,                          /* get_current_software_framebuffer */
   NULL,                          /* get_hw_render_interface */
};

static void d3d11_gfx_get_poke_interface(void* data, const video_poke_interface_t** iface)
{
   *iface = &d3d11_poke_interface;
}

video_driver_t video_d3d11 = {
   d3d11_gfx_init,
   d3d11_gfx_frame,
   d3d11_gfx_set_nonblock_state,
   d3d11_gfx_alive,
   d3d11_gfx_focus,
   d3d11_gfx_suppress_screensaver,
   d3d11_gfx_has_windowed,
   d3d11_gfx_set_shader,
   d3d11_gfx_free,
   "d3d11",
   NULL, /* set_viewport */
   d3d11_gfx_set_rotation,
   d3d11_gfx_viewport_info,
   d3d11_gfx_read_viewport,
   NULL, /* read_frame_raw */

#ifdef HAVE_OVERLAY
   NULL, /* overlay_interface */
#endif
   d3d11_gfx_get_poke_interface,
};