static bool gfx_ctx_init(void)
{
   struct android_app *android_app = (struct android_app*)g_android;
   const EGLint attribs[] = {
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
      EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
      EGL_BLUE_SIZE, 8,
      EGL_GREEN_SIZE, 8,
      EGL_RED_SIZE, 8,
      EGL_NONE
   };
   EGLint num_config;
   EGLint egl_version_major, egl_version_minor;
   EGLint format;

   EGLint context_attributes[] = {
      EGL_CONTEXT_CLIENT_VERSION, 2,
      EGL_NONE
   };

   RARCH_LOG("Initializing context\n");

   if ((g_egl_dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY)) == EGL_NO_DISPLAY)
   {
      RARCH_ERR("eglGetDisplay failed.\n");
      goto error;
   }

   if (!eglInitialize(g_egl_dpy, &egl_version_major, &egl_version_minor))
   {
      RARCH_ERR("eglInitialize failed.\n");
      goto error;
   }

   RARCH_LOG("[ANDROID/EGL]: EGL version: %d.%d\n", egl_version_major, egl_version_minor);

   if (!eglChooseConfig(g_egl_dpy, attribs, &g_config, 1, &num_config))
   {
      RARCH_ERR("eglChooseConfig failed.\n");
      goto error;
   }

   int var = eglGetConfigAttrib(g_egl_dpy, g_config, EGL_NATIVE_VISUAL_ID, &format);

   if (!var)
   {
      RARCH_ERR("eglGetConfigAttrib failed: %d.\n", var);
      goto error;
   }

   ANativeWindow_setBuffersGeometry(android_app->window, 0, 0, format);

   if (!(g_egl_surf = eglCreateWindowSurface(g_egl_dpy, g_config, android_app->window, 0)))
   {
      RARCH_ERR("eglCreateWindowSurface failed.\n");
      goto error;
   }

   if (!(g_egl_ctx = eglCreateContext(g_egl_dpy, g_config, 0, context_attributes)))
   {
      RARCH_ERR("eglCreateContext failed.\n");
      goto error;
   }

   if (!eglMakeCurrent(g_egl_dpy, g_egl_surf, g_egl_surf, g_egl_ctx))
   {
      RARCH_ERR("eglMakeCurrent failed.\n");
      goto error;
   }

   ALooper *looper = ALooper_forThread();
   if (!looper)
      ALooper_prepare(ALOOPER_PREPARE_ALLOW_NON_CALLBACKS);

   return true;

error:
   RARCH_ERR("EGL error: %d.\n", eglGetError());
   gfx_ctx_destroy();
   return false;
}

static void *gdi_gfx_init(const video_info_t *video,
      const input_driver_t **input, void **input_data)
{
   unsigned full_x, full_y;
   gfx_ctx_input_t inp;
   gfx_ctx_mode_t mode;
   const gfx_ctx_driver_t *ctx_driver   = NULL;
   unsigned win_width = 0, win_height   = 0;
   unsigned temp_width = 0, temp_height = 0;
   settings_t *settings                 = config_get_ptr();
   gdi_t *gdi                           = (gdi_t*)calloc(1, sizeof(*gdi));

   *input                               = NULL;
   *input_data                          = NULL;

   gdi_video_width                      = video->width;
   gdi_video_height                     = video->height;
   gdi_rgb32                            = video->rgb32;

   gdi_video_bits                       = video->rgb32 ? 32 : 16;

   if (video->rgb32)
      gdi_video_pitch = video->width * 4;
   else
      gdi_video_pitch = video->width * 2;

   gdi_gfx_create();

   ctx_driver = video_context_driver_init_first(gdi,
         settings->video.context_driver,
         GFX_CTX_GDI_API, 1, 0, false);
   if (!ctx_driver)
      goto error;

   video_context_driver_set((const gfx_ctx_driver_t*)ctx_driver);

   RARCH_LOG("Found GDI context: %s\n", ctx_driver->ident);

   video_context_driver_get_video_size(&mode);

   full_x      = mode.width;
   full_y      = mode.height;
   mode.width  = 0;
   mode.height = 0;

   RARCH_LOG("Detecting screen resolution %ux%u.\n", full_x, full_y);

   win_width   = video->width;
   win_height  = video->height;

   if (video->fullscreen && (win_width == 0) && (win_height == 0))
   {
      win_width  = full_x;
      win_height = full_y;
   }

   mode.width      = win_width;
   mode.height     = win_height;
   mode.fullscreen = video->fullscreen;

   if (!video_context_driver_set_video_mode(&mode))
      goto error;

   mode.width     = 0;
   mode.height    = 0;

   video_context_driver_get_video_size(&mode);

   temp_width     = mode.width;
   temp_height    = mode.height;
   mode.width     = 0;
   mode.height    = 0;

   /* Get real known video size, which might have been altered by context. */

   if (temp_width != 0 && temp_height != 0)
      video_driver_set_size(&temp_width, &temp_height);

   video_driver_get_size(&temp_width, &temp_height);

   RARCH_LOG("GDI: Using resolution %ux%u\n", temp_width, temp_height);

   inp.input      = input;
   inp.input_data = input_data;

   video_context_driver_input_driver(&inp);

   if (settings->video.font_enable)
      font_driver_init_osd(NULL, false, FONT_DRIVER_RENDER_GDI);

   RARCH_LOG("[GDI]: Init complete.\n");

   return gdi;

error:
   video_context_driver_destroy();
   if (gdi)
      free(gdi);
   return NULL;
}

/**
 * recording_init:
 *
 * Initializes recording.
 *
 * Returns: true (1) if successful, otherwise false (0).
 **/
bool recording_init(void)
{
   char recording_file[PATH_MAX_LENGTH] = {0};
   struct ffemu_params params           = {0};
   global_t *global                     = global_get_ptr();
   driver_t *driver                     = driver_get_ptr();
   settings_t *settings                 = config_get_ptr();
   struct retro_system_av_info *av_info = video_viewport_get_system_av_info();
   const struct retro_hw_render_callback *hw_render = 
      (const struct retro_hw_render_callback*)video_driver_callback();
   bool *recording_enabled              = recording_is_enabled();

   if (!*recording_enabled)
      return false;

   if (global->inited.core.type == CORE_TYPE_DUMMY)
   {
      RARCH_WARN("%s\n", msg_hash_to_str(MSG_USING_LIBRETRO_DUMMY_CORE_RECORDING_SKIPPED));
      return false;
   }

   if (!settings->video.gpu_record && hw_render->context_type)
   {
      RARCH_WARN("%s.\n", msg_hash_to_str(MSG_HW_RENDERED_MUST_USE_POSTSHADED_RECORDING));
      return false;
   }

   RARCH_LOG("%s: FPS: %.4f, Sample rate: %.4f\n",
         msg_hash_to_str(MSG_CUSTOM_TIMING_GIVEN),
         (float)av_info->timing.fps,
         (float)av_info->timing.sample_rate);

   strlcpy(recording_file, global->record.path, sizeof(recording_file));

   if (global->record.use_output_dir)
      fill_pathname_join(recording_file,
            global->record.output_dir,
            global->record.path, sizeof(recording_file));

   params.out_width  = av_info->geometry.base_width;
   params.out_height = av_info->geometry.base_height;
   params.fb_width   = av_info->geometry.max_width;
   params.fb_height  = av_info->geometry.max_height;
   params.channels   = 2;
   params.filename   = recording_file;
   params.fps        = av_info->timing.fps;
   params.samplerate = av_info->timing.sample_rate;
   params.pix_fmt    = (video_driver_get_pixel_format() == RETRO_PIXEL_FORMAT_XRGB8888) ?
      FFEMU_PIX_ARGB8888 : FFEMU_PIX_RGB565;
   params.config     = NULL;
   
   if (*global->record.config)
      params.config = global->record.config;

   if (settings->video.gpu_record && driver->video->read_viewport)
   {
      struct video_viewport vp = {0};

      video_driver_viewport_info(&vp);

      if (!vp.width || !vp.height)
      {
         RARCH_ERR("Failed to get viewport information from video driver. "
               "Cannot start recording ...\n");
         return false;
      }

      params.out_width  = vp.width;
      params.out_height = vp.height;
      params.fb_width   = next_pow2(vp.width);
      params.fb_height  = next_pow2(vp.height);

      if (settings->video.force_aspect &&
            (video_driver_get_aspect_ratio() > 0.0f))
         params.aspect_ratio  = video_driver_get_aspect_ratio();
      else
         params.aspect_ratio  = (float)vp.width / vp.height;

      params.pix_fmt             = FFEMU_PIX_BGR24;
      global->record.gpu_width   = vp.width;
      global->record.gpu_height  = vp.height;

      RARCH_LOG("%s %u x %u\n", msg_hash_to_str(MSG_DETECTED_VIEWPORT_OF),
            vp.width, vp.height);

      global->record.gpu_buffer = (uint8_t*)malloc(vp.width * vp.height * 3);
      if (!global->record.gpu_buffer)
         return false;
   }
   else
   {
      if (global->record.width || global->record.height)
      {
//.........这里部分代码省略.........

static unsigned get_xml_shaders(const char *path, struct shader_program *prog, size_t size)
{
   LIBXML_TEST_VERSION;

   xmlParserCtxtPtr ctx = xmlNewParserCtxt();
   if (!ctx)
   {
      RARCH_ERR("Failed to load libxml2 context.\n");
      return false;
   }

   RARCH_LOG("Loading XML shader: %s\n", path);
   xmlDocPtr doc = xmlCtxtReadFile(ctx, path, NULL, 0);
   xmlNodePtr head = NULL;
   xmlNodePtr cur = NULL;
   unsigned num = 0;

   if (!doc)
   {
      RARCH_ERR("Failed to parse XML file: %s\n", path);
      goto error;
   }

   if (ctx->valid == 0)
   {
      RARCH_ERR("Cannot validate XML shader: %s\n", path);
      goto error;
   }

   head = xmlDocGetRootElement(doc);

   for (cur = head; cur; cur = cur->next)
   {
      if (cur->type != XML_ELEMENT_NODE)
         continue;
      if (strcmp((const char*)cur->name, "shader") != 0)
         continue;

      char attr[64];
      xml_get_prop(attr, sizeof(attr), cur, "language");
      if (strcmp(attr, "GLSL") != 0)
         continue;

      xml_get_prop(attr, sizeof(attr), cur, "style");
      glsl_modern = strcmp(attr, "GLES2") == 0;

      if (glsl_modern)
         RARCH_LOG("[GL]: Shader reports a GLES2 style shader.\n");
      break;
   }

   if (!cur) // We couldn't find any GLSL shader :(
      goto error;

   memset(prog, 0, sizeof(struct shader_program) * size);

   // Iterate to check if we find fragment and/or vertex shaders.
   for (cur = cur->children; cur && num < size; cur = cur->next)
   {
      if (cur->type != XML_ELEMENT_NODE)
         continue;

      char *content = xml_get_content(cur);
      if (!content)
         continue;

      if (strcmp((const char*)cur->name, "vertex") == 0)
      {
         if (prog[num].vertex)
         {
            RARCH_ERR("Cannot have more than one vertex shader in a program.\n");
            free(content);
            goto error;
         }

         content = xml_replace_if_file(content, path, cur, "src");
         if (!content)
         {
            RARCH_ERR("Shader source file was provided, but failed to read.\n");
            goto error;
         }

         prog[num].vertex = content;
      }
      else if (strcmp((const char*)cur->name, "fragment") == 0)
      {
         if (glsl_modern && !prog[num].vertex)
         {
            RARCH_ERR("Modern GLSL was chosen and vertex shader was not provided. This is an error.\n");
            free(content);
            goto error;
         }

         content = xml_replace_if_file(content, path, cur, "src");
         if (!content)
         {
            RARCH_ERR("Shader source file was provided, but failed to read.\n");
            goto error;
         }

//.........这里部分代码省略.........

static void *xdk_d3d_init(const video_info_t *video, const input_driver_t **input, void **input_data)
{
   HRESULT ret;

   if (driver.video_data)
   {
      xdk_d3d_video_t *d3d = (xdk_d3d_video_t*)driver.video_data;
      // Reinitialize textures as we might have changed pixel formats.
      xdk_d3d_reinit_textures(d3d, video);
      return driver.video_data;
   }

   //we'll just use driver.video_data throughout here because it needs to
   //exist when we delegate initing to the context file
   driver.video_data = (xdk_d3d_video_t*)calloc(1, sizeof(xdk_d3d_video_t));
   if (!driver.video_data)
      return NULL;

   xdk_d3d_video_t *d3d = (xdk_d3d_video_t*)driver.video_data;

   d3d->vsync = video->vsync;
   d3d->tex_w = RARCH_SCALE_BASE * video->input_scale;
   d3d->tex_h = RARCH_SCALE_BASE * video->input_scale;

#if defined(_XBOX1)
   d3d->ctx_driver = gfx_ctx_init_first(GFX_CTX_DIRECT3D8_API, 8, 0);
#elif defined(_XBOX360)
   d3d->ctx_driver = gfx_ctx_init_first(GFX_CTX_DIRECT3D9_API, 9, 0);
#endif
   if (d3d->ctx_driver)
   {
      D3DPRESENT_PARAMETERS d3dpp;
      xdk_d3d_generate_pp(&d3dpp, video);

      ret = d3d->d3d_device->CreateDevice(0, D3DDEVTYPE_HAL, NULL, D3DCREATE_HARDWARE_VERTEXPROCESSING,
            &d3dpp, &d3d->d3d_render_device);

      if (ret != S_OK)
         RARCH_ERR("Failed at CreateDevice.\n");
      RD3DDevice_Clear(d3d->d3d_render_device, 0, NULL, D3DCLEAR_TARGET, 0xff000000, 1.0f, 0);
   }
   else
   {
      free(d3d);
      return NULL;
   }

   RARCH_LOG("Found D3D context: %s\n", d3d->ctx_driver->ident);

   xdk_d3d_init_textures(d3d, video);

#if defined(_XBOX1)
   // use an orthogonal matrix for the projection matrix
   D3DXMATRIX mat;
   D3DXMatrixOrthoOffCenterLH(&mat, 0,  d3d->win_width ,  d3d->win_height , 0, 0.0f, 1.0f);

   d3d->d3d_render_device->SetTransform(D3DTS_PROJECTION, &mat);

   // use an identity matrix for the world and view matrices
   D3DXMatrixIdentity(&mat);
   d3d->d3d_render_device->SetTransform(D3DTS_WORLD, &mat);
   d3d->d3d_render_device->SetTransform(D3DTS_VIEW, &mat);

   ret = d3d->d3d_render_device->CreateVertexBuffer(4 * sizeof(DrawVerticeFormats), 
         D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_MANAGED, &d3d->vertex_buf);

   if (ret != S_OK)
   {
      RARCH_ERR("[xdk_d3d_init::] Failed at CreateVertexBuffer.\n");
      return NULL;
   }

   const DrawVerticeFormats init_verts[] = {
      { -1.0f, -1.0f, 1.0f, 0.0f, 1.0f },
      {  1.0f, -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, 0.0f },
   };

   BYTE *verts_ptr;
   RD3DVertexBuffer_Lock(d3d->vertex_buf, 0, 0, &verts_ptr, 0);
   memcpy(verts_ptr, init_verts, sizeof(init_verts));
   RD3DVertexBuffer_Unlock(d3d->vertex_buf);

   RD3DDevice_SetVertexShader(d3d->d3d_render_device, D3DFVF_XYZ | D3DFVF_TEX1);
#elif defined(_XBOX360)
   ret = d3d->d3d_render_device->CreateVertexBuffer(4 * sizeof(DrawVerticeFormats), 
         0, 0, 0, &d3d->vertex_buf, NULL);

   if (ret != S_OK)
   {
      RARCH_ERR("[xdk_d3d_init::] Failed at CreateVertexBuffer.\n");
      return NULL;
   }

   static const DrawVerticeFormats init_verts[] = {
      { -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, 0.0f },
//.........这里部分代码省略.........

static bool environment_cb(unsigned cmd, void *data)
{
   switch (cmd)
   {
      case RETRO_ENVIRONMENT_GET_OVERSCAN:
         *(bool*)data = !g_settings.video.crop_overscan;
         RARCH_LOG("Environ GET_OVERSCAN: %u\n", (unsigned)!g_settings.video.crop_overscan);
         break;

      case RETRO_ENVIRONMENT_GET_CAN_DUPE:
         *(bool*)data = true;
         RARCH_LOG("Environ GET_CAN_DUPE: true\n");
         break;

      case RETRO_ENVIRONMENT_GET_VARIABLE:
      {
         struct retro_variable *var = (struct retro_variable*)data;
         RARCH_LOG("Environ GET_VARIABLE %s:\n", var->key);

         if (g_extern.system.core_options)
            core_option_get(g_extern.system.core_options, var);
         else
            var->value = NULL;

         RARCH_LOG("\t%s\n", var->value ? var->value : "N/A");
         break;
      }

      case RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE:
         *(bool*)data = g_extern.system.core_options ?
            core_option_updated(g_extern.system.core_options) : false;
         break;

      case RETRO_ENVIRONMENT_SET_VARIABLES:
      {
         RARCH_LOG("Environ SET_VARIABLES.\n");

         if (g_extern.system.core_options)
         {
            core_option_flush(g_extern.system.core_options);
            core_option_free(g_extern.system.core_options);
         }

         const struct retro_variable *vars = (const struct retro_variable*)data;

         const char *options_path = g_settings.core_options_path;
         char buf[PATH_MAX];
         if (!*options_path && *g_extern.config_path)
         {
            fill_pathname_resolve_relative(buf, g_extern.config_path, ".retroarch-core-options.cfg", sizeof(buf));
            options_path = buf;
         }
         g_extern.system.core_options = core_option_new(options_path, vars);

         break;
      }

      case RETRO_ENVIRONMENT_SET_MESSAGE:
      {
         const struct retro_message *msg = (const struct retro_message*)data;
         RARCH_LOG("Environ SET_MESSAGE: %s\n", msg->msg);
         if (g_extern.msg_queue)
            msg_queue_push(g_extern.msg_queue, msg->msg, 1, msg->frames);
         break;
      }

      case RETRO_ENVIRONMENT_SET_ROTATION:
      {
         unsigned rotation = *(const unsigned*)data;
         RARCH_LOG("Environ SET_ROTATION: %u\n", rotation);
         if (!g_settings.video.allow_rotate)
            break;

         g_extern.system.rotation = rotation;

         if (driver.video && driver.video->set_rotation)
         {
            if (driver.video_data)
               video_set_rotation_func(rotation);
         }
         else
            return false;
         break;
      }

      case RETRO_ENVIRONMENT_SHUTDOWN:
         RARCH_LOG("Environ SHUTDOWN.\n");
         g_extern.system.shutdown = true;
         break;

      case RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL:
         g_extern.system.performance_level = *(const unsigned*)data;
         RARCH_LOG("Environ PERFORMANCE_LEVEL: %u.\n", g_extern.system.performance_level);
         break;

      case RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY:
         *(const char **)data = *g_settings.system_directory ? g_settings.system_directory : NULL;
         RARCH_LOG("Environ SYSTEM_DIRECTORY: \"%s\".\n", g_settings.system_directory);
         break;

//.........这里部分代码省略.........

static bool get_xml_attrs(struct shader_program *prog, xmlNodePtr ptr)
{
   prog->scale_x = 1.0;
   prog->scale_y = 1.0;
   prog->type_x = prog->type_y = RARCH_SCALE_INPUT;
   prog->valid_scale = false;

   // Check if shader forces a certain texture filtering.
   char attr[64];
   if (xml_get_prop(attr, sizeof(attr), ptr, "filter"))
   {
      if (strcmp(attr, "nearest") == 0)
      {
         prog->filter = RARCH_GL_NEAREST;
         RARCH_LOG("XML: Shader forces GL_NEAREST.\n");
      }
      else if (strcmp(attr, "linear") == 0)
      {
         prog->filter = RARCH_GL_LINEAR;
         RARCH_LOG("XML: Shader forces GL_LINEAR.\n");
      }
      else
         RARCH_WARN("XML: Invalid property for filter.\n");
   }
   else
      prog->filter = RARCH_GL_NOFORCE;

   // Check for scaling attributes *lots of code <_<*
   char attr_scale[64], attr_scale_x[64], attr_scale_y[64];
   char attr_size[64], attr_size_x[64], attr_size_y[64];
   char attr_outscale[64], attr_outscale_x[64], attr_outscale_y[64];

   xml_get_prop(attr_scale, sizeof(attr_scale), ptr, "scale");
   xml_get_prop(attr_scale_x, sizeof(attr_scale_x), ptr, "scale_x");
   xml_get_prop(attr_scale_y, sizeof(attr_scale_y), ptr, "scale_y");
   xml_get_prop(attr_size, sizeof(attr_size), ptr, "size");
   xml_get_prop(attr_size_x, sizeof(attr_size_x), ptr, "size_x");
   xml_get_prop(attr_size_y, sizeof(attr_size_y), ptr, "size_y");
   xml_get_prop(attr_outscale, sizeof(attr_outscale), ptr, "outscale");
   xml_get_prop(attr_outscale_x, sizeof(attr_outscale_x), ptr, "outscale_x");
   xml_get_prop(attr_outscale_y, sizeof(attr_outscale_y), ptr, "outscale_y");

   unsigned x_attr_cnt = 0, y_attr_cnt = 0;

   if (*attr_scale)
   {
      float scale = strtod(attr_scale, NULL);
      prog->scale_x = scale;
      prog->scale_y = scale;
      prog->valid_scale = true;
      prog->type_x = prog->type_y = RARCH_SCALE_INPUT;
      RARCH_LOG("Got scale attr: %.1f\n", scale);
      x_attr_cnt++;
      y_attr_cnt++;
   }

   if (*attr_scale_x)
   {
      float scale = strtod(attr_scale_x, NULL);
      prog->scale_x = scale;
      prog->valid_scale = true;
      prog->type_x = RARCH_SCALE_INPUT;
      RARCH_LOG("Got scale_x attr: %.1f\n", scale);
      x_attr_cnt++;
   }

   if (*attr_scale_y)
   {
      float scale = strtod(attr_scale_y, NULL);
      prog->scale_y = scale;
      prog->valid_scale = true;
      prog->type_y = RARCH_SCALE_INPUT;
      RARCH_LOG("Got scale_y attr: %.1f\n", scale);
      y_attr_cnt++;
   }
   
   if (*attr_size)
   {
      prog->abs_x = prog->abs_y = strtoul(attr_size, NULL, 0);
      prog->valid_scale = true;
      prog->type_x = prog->type_y = RARCH_SCALE_ABSOLUTE;
      RARCH_LOG("Got size attr: %u\n", prog->abs_x);
      x_attr_cnt++;
      y_attr_cnt++;
   }

   if (*attr_size_x)
   {
      prog->abs_x = strtoul(attr_size_x, NULL, 0);
      prog->valid_scale = true;
      prog->type_x = RARCH_SCALE_ABSOLUTE;
      RARCH_LOG("Got size_x attr: %u\n", prog->abs_x);
      x_attr_cnt++;
   }

   if (*attr_size_y)
   {
      prog->abs_y = strtoul(attr_size_y, NULL, 0);
      prog->valid_scale = true;
      prog->type_y = RARCH_SCALE_ABSOLUTE;
//.........这里部分代码省略.........

static bool gfx_ctx_ps3_init(void *data)
{
   gfx_ctx_ps3_data_t *ps3 = (gfx_ctx_ps3_data_t*)
      calloc(1, sizeof(gfx_ctx_ps3_data_t));

   (void)data;

   if (!ps3)
      return false;

#if defined(HAVE_PSGL)
   PSGLinitOptions options = {
      .enable = PSGL_INIT_MAX_SPUS | PSGL_INIT_INITIALIZE_SPUS,
      .maxSPUs = 1,
      .initializeSPUs = GL_FALSE,
   };

   /* Initialize 6 SPUs but reserve 1 SPU as a raw SPU for PSGL. */
   sys_spu_initialize(6, 1);
   psglInit(&options);

   PSGLdeviceParameters params;

   params.enable = PSGL_DEVICE_PARAMETERS_COLOR_FORMAT |
      PSGL_DEVICE_PARAMETERS_DEPTH_FORMAT |
      PSGL_DEVICE_PARAMETERS_MULTISAMPLING_MODE;
   params.colorFormat = GL_ARGB_SCE;
   params.depthFormat = GL_NONE;
   params.multisamplingMode = GL_MULTISAMPLING_NONE_SCE;

   if (g_extern.console.screen.resolutions.current.id)
   {
      params.enable |= PSGL_DEVICE_PARAMETERS_WIDTH_HEIGHT;
      params.width = gfx_ctx_ps3_get_resolution_width(g_extern.console.screen.resolutions.current.id);
      params.height = gfx_ctx_ps3_get_resolution_height(g_extern.console.screen.resolutions.current.id);
      g_extern.console.screen.pal_enable = false;

      if (params.width == 720 && params.height == 576)
      {
         RARCH_LOG("[PSGL Context]: 720x576 resolution detected, setting MODE_VIDEO_PAL_ENABLE.\n");
         g_extern.console.screen.pal_enable = true;
      }
   }

   if (g_extern.console.screen.pal60_enable)
   {
      RARCH_LOG("[PSGL Context]: Setting temporal PAL60 mode.\n");
      params.enable |= PSGL_DEVICE_PARAMETERS_RESC_PAL_TEMPORAL_MODE;
      params.enable |= PSGL_DEVICE_PARAMETERS_RESC_RATIO_MODE;
      params.rescPalTemporalMode = RESC_PAL_TEMPORAL_MODE_60_INTERPOLATE;
      params.rescRatioMode = RESC_RATIO_MODE_FULLSCREEN;
   }

   ps3->gl_device = psglCreateDeviceExtended(&params);
   ps3->gl_context = psglCreateContext();

   psglMakeCurrent(ps3->gl_context, ps3->gl_device);
   psglResetCurrentContext();
#endif

   g_extern.console.screen.pal_enable = 
      cellVideoOutGetResolutionAvailability(
            CELL_VIDEO_OUT_PRIMARY, CELL_VIDEO_OUT_RESOLUTION_576,
            CELL_VIDEO_OUT_ASPECT_AUTO, 0);

   gfx_ctx_ps3_get_available_resolutions();

   driver.video_context_data = ps3;

   return true;
}

static bool gfx_ctx_ps3_set_video_mode(void *data,
      unsigned width, unsigned height,
      bool fullscreen)
{
   (void)data;
   return true;
}

bool load_state(const char *path)
{
   unsigned i;
   void *buf = NULL;
   ssize_t size = read_file(path, &buf);

   RARCH_LOG("Loading state: \"%s\".\n", path);

   if (size < 0)
   {
      RARCH_ERR("Failed to load state from \"%s\".\n", path);
      return false;
   }

   bool ret = true;
   RARCH_LOG("State size: %u bytes.\n", (unsigned)size);

   struct sram_block *blocks = NULL;
   unsigned num_blocks = 0;

   if (g_settings.block_sram_overwrite && g_extern.savefiles
         && g_extern.savefiles->size)
   {
      RARCH_LOG("Blocking SRAM overwrite.\n");
      blocks = (struct sram_block*)
         calloc(g_extern.savefiles->size, sizeof(*blocks));

      if (blocks)
      {
         num_blocks = g_extern.savefiles->size;
         for (i = 0; i < num_blocks; i++)
            blocks[i].type = g_extern.savefiles->elems[i].attr.i;
      }
   }

   for (i = 0; i < num_blocks; i++)
      blocks[i].size = pretro_get_memory_size(blocks[i].type);

   for (i = 0; i < num_blocks; i++)
      if (blocks[i].size)
         blocks[i].data = malloc(blocks[i].size);

   /* Backup current SRAM which is overwritten by unserialize. */
   for (i = 0; i < num_blocks; i++)
   {
      if (blocks[i].data)
      {
         const void *ptr = pretro_get_memory_data(blocks[i].type);
         if (ptr)
            memcpy(blocks[i].data, ptr, blocks[i].size);
      }
   }

   ret = pretro_unserialize(buf, size);

   /* Flush back. */
   for (i = 0; i < num_blocks; i++)
   {
      if (blocks[i].data)
      {
         void *ptr = pretro_get_memory_data(blocks[i].type);
         if (ptr)
            memcpy(ptr, blocks[i].data, blocks[i].size);
      }
   }

   for (i = 0; i < num_blocks; i++)
      free(blocks[i].data);
   free(blocks);
   return ret;
}

static bool gfx_ctx_qnx_init(void *data)
{
   EGLint num_config;
   EGLint egl_version_major, egl_version_minor;
   EGLint context_attributes[] = {
      EGL_CONTEXT_CLIENT_VERSION, 2,
      EGL_NONE
   };
   const EGLint attribs[] = {
      EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
      EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
      EGL_BLUE_SIZE, 8,
      EGL_GREEN_SIZE, 8,
      EGL_RED_SIZE, 8,
      EGL_NONE
   };
   int angle, size[2];
   int usage, format = SCREEN_FORMAT_RGBX8888;

   /* Create a screen context that will be used to 
    * create an EGL surface to receive libscreen events */

   RARCH_LOG("Initializing screen context...\n");
   if (!screen_ctx)
   {
      screen_create_context(&screen_ctx, 0);

      if (screen_request_events(screen_ctx) != BPS_SUCCESS)
      {
         RARCH_ERR("screen_request_events failed.\n");
         goto screen_error;
      }

      if (navigator_request_events(0) != BPS_SUCCESS)
      {
         RARCH_ERR("navigator_request_events failed.\n");
         goto screen_error;
      }

      if (navigator_rotation_lock(false) != BPS_SUCCESS)
      {
         RARCH_ERR("navigator_location_lock failed.\n");
         goto screen_error;
      }
   }

   usage = SCREEN_USAGE_OPENGL_ES2 | SCREEN_USAGE_ROTATION;

   RARCH_LOG("Initializing context\n");

   if ((g_egl_dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY)) == EGL_NO_DISPLAY)
   {
      RARCH_ERR("eglGetDisplay failed.\n");
      goto error;
   }

   if (!eglInitialize(g_egl_dpy, &egl_version_major, &egl_version_minor))
   {
      RARCH_ERR("eglInitialize failed.\n");
      goto error;
   }

   if (!eglBindAPI(EGL_OPENGL_ES_API))
   {
      RARCH_ERR("eglBindAPI failed.\n");
      goto error;
   }

   RARCH_LOG("[BLACKBERRY QNX/EGL]: EGL version: %d.%d\n", egl_version_major, egl_version_minor);

   if (!eglChooseConfig(g_egl_dpy, attribs, &g_config, 1, &num_config))
      goto error;

   g_egl_ctx = eglCreateContext(g_egl_dpy, g_config, EGL_NO_CONTEXT, context_attributes);

   if (g_egl_ctx == EGL_NO_CONTEXT)
      goto error;

   if (g_use_hw_ctx)
   {
      g_egl_hw_ctx = eglCreateContext(g_egl_dpy, g_config, g_egl_ctx,
            context_attributes);
      RARCH_LOG("[Android/EGL]: Created shared context: %p.\n", (void*)g_egl_hw_ctx);

      if (g_egl_hw_ctx == EGL_NO_CONTEXT)
         goto error;
   }

   if(!screen_win)
   {
      if (screen_create_window(&screen_win, screen_ctx))
      {
	     RARCH_ERR("screen_create_window failed:.\n");
	     goto error;
      }
   }

   if (screen_set_window_property_iv(screen_win, SCREEN_PROPERTY_FORMAT, &format))
   {
      RARCH_ERR("screen_set_window_property_iv [SCREEN_PROPERTY_FORMAT] failed.\n");
//.........这里部分代码省略.........

static void handle_screen_event(void *data, bps_event_t *event)
{
   int type;
   qnx_input_t *qnx = (qnx_input_t*)data;

   screen_event_t screen_event = screen_event_get_event(event);
   screen_get_event_property_iv(screen_event, SCREEN_PROPERTY_TYPE, &type);

   switch(type)
   {
      case SCREEN_EVENT_MTOUCH_TOUCH:
      case SCREEN_EVENT_MTOUCH_RELEASE:
      case SCREEN_EVENT_MTOUCH_MOVE:
         process_touch_event(data, screen_event, type);
         break;
      case SCREEN_EVENT_KEYBOARD:
         process_keyboard_event(data, screen_event, type);
         break;
#ifdef HAVE_BB10
      case SCREEN_EVENT_GAMEPAD:
      case SCREEN_EVENT_JOYSTICK:
         process_gamepad_event(data, screen_event, type);
         break;
      case SCREEN_EVENT_DEVICE:
         {
            // A device was attached or removed.
            screen_device_t device;
            int attached, type, i;

            screen_get_event_property_pv(screen_event,
                  SCREEN_PROPERTY_DEVICE, (void**)&device);
            screen_get_event_property_iv(screen_event,
                  SCREEN_PROPERTY_ATTACHED, &attached);

            if (attached)
               screen_get_device_property_iv(device,
                     SCREEN_PROPERTY_TYPE, &type);

            if (attached && (type == SCREEN_EVENT_GAMEPAD || type == SCREEN_EVENT_JOYSTICK || type == SCREEN_EVENT_KEYBOARD))
            {
               for (i = 0; i < MAX_PADS; ++i)
               {
                  if (!qnx->devices[i].handle)
                  {
                     qnx->devices[i].handle = device;
                     loadController(data, &qnx->devices[i]);
                     break;
                  }
               }
            }
            else
            {
               for (i = 0; i < MAX_PADS; ++i)
               {
                  if (device == qnx->devices[i].handle)
                  {
                     RARCH_LOG("Device %s: Disconnected.\n", qnx->devices[i].id);
                     initController(data, &qnx->devices[i]);
                     break;
                  }
               }
            }
         }
         break;
#endif
      default:
         break;
   }
}

rarch_resampler_t *resampler_new(void)
{
   RARCH_LOG("Hermite resampler [C]\n");
   return (rarch_resampler_t*)calloc(1, sizeof(rarch_resampler_t));
}

static bool winxinput_joypad_init(void)
{
   unsigned i, autoconf_pad;
   g_winxinput_dll = NULL;

   // Find the correct path to load the DLL from.
   // Usually this will be from the system directory,
   // but occasionally a user may wish to use a third-party
   // wrapper DLL (such as x360ce); support these by checking
   // the working directory first.

   // No need to check for existance as we will be checking LoadLibrary's
   // success anyway.

   const char *version = "1.4";
   g_winxinput_dll = LoadLibrary("xinput1_4.dll"); // Using dylib_* complicates building joyconfig.
   if (!g_winxinput_dll)
   {
      g_winxinput_dll = LoadLibrary("xinput1_3.dll");
      version = "1.3";
   }

   if (!g_winxinput_dll)
   {
      RARCH_ERR("Failed to load XInput, ensure DirectX and controller drivers are up to date.\n");
      return false;
   }

   RARCH_LOG("Found XInput v%s.\n", version);

   // If we get here then an xinput DLL is correctly loaded.
   // First try to load ordinal 100 (XInputGetStateEx).
   g_XInputGetStateEx = (XInputGetStateEx_t) GetProcAddress(g_winxinput_dll, (const char*)100);
   g_winxinput_guide_button_supported = true;

   if (!g_XInputGetStateEx)
   {
      // no ordinal 100. (Presumably a wrapper.) Load the ordinary
      // XInputGetState, at the cost of losing guide button support.
      g_winxinput_guide_button_supported = false;
      g_XInputGetStateEx = (XInputGetStateEx_t) GetProcAddress(g_winxinput_dll, "XInputGetState");
      if (!g_XInputGetStateEx)
      {
         RARCH_ERR("Failed to init XInput: DLL is invalid or corrupt.\n");
         FreeLibrary(g_winxinput_dll);
         return false; // DLL was loaded but did not contain the correct function.
      }
      RARCH_WARN("XInput: No guide button support.\n");
   }

   g_XInputSetState = (XInputSetState_t) GetProcAddress(g_winxinput_dll, "XInputSetState");
   if (!g_XInputSetState)
   {
      RARCH_ERR("Failed to init XInput: DLL is invalid or corrupt.\n");
      FreeLibrary(g_winxinput_dll);
      return false; // DLL was loaded but did not contain the correct function.
   }

   // Zero out the states
   for (i = 0; i < 4; ++i)
      memset(&g_winxinput_states[i], 0, sizeof(winxinput_joypad_state));

   // Do a dummy poll to check which controllers are connected.
   XINPUT_STATE dummy_state;
   for (i = 0; i < 4; ++i)
   {
      g_winxinput_states[i].connected = !(g_XInputGetStateEx(i, &dummy_state) == ERROR_DEVICE_NOT_CONNECTED);
      if (g_winxinput_states[i].connected)
         RARCH_LOG("Found XInput controller, player #%u\n", i);
   }

   if ((!g_winxinput_states[0].connected) &&
         (!g_winxinput_states[1].connected) &&
         (!g_winxinput_states[2].connected) &&
         (!g_winxinput_states[3].connected))
      return false;

   g_xinput_block_pads = true;

   // We're going to have to be buddies with dinput if we want to be able
   // to use XI and non-XI controllers together.
   if (!dinput_joypad.init())
   {
      g_xinput_block_pads = false;
      return false;
   }

   for (autoconf_pad = 0; autoconf_pad < MAX_PLAYERS; autoconf_pad++)
   {
      if (pad_index_to_xplayer_index(autoconf_pad) > -1)
      {
         strlcpy(g_settings.input.device_names[autoconf_pad], winxinput_joypad_name(autoconf_pad), sizeof(g_settings.input.device_names[autoconf_pad]));
         input_config_autoconfigure_joypad(autoconf_pad, winxinput_joypad_name(autoconf_pad), winxinput_joypad.ident);
      }
   }

   return true;

}

static void *alsa_thread_init(const char *device,
      unsigned rate, unsigned latency)
{
   alsa_thread_t *alsa = (alsa_thread_t*)calloc(1, sizeof(alsa_thread_t));

   snd_pcm_hw_params_t *params = NULL;
   snd_pcm_sw_params_t *sw_params = NULL;

   const char *alsa_dev = device ? device : "default";

   unsigned latency_usec = latency * 1000 / 2;

   unsigned channels = 2;
   unsigned periods = 4;
   snd_pcm_uframes_t buffer_size;
   snd_pcm_format_t format;

   if (!alsa)
      return NULL;

   TRY_ALSA(snd_pcm_open(&alsa->pcm, alsa_dev, SND_PCM_STREAM_PLAYBACK, 0));

   TRY_ALSA(snd_pcm_hw_params_malloc(&params));
   alsa->has_float = alsathread_find_float_format(alsa->pcm, params);
   format = alsa->has_float ? SND_PCM_FORMAT_FLOAT : SND_PCM_FORMAT_S16;

   TRY_ALSA(snd_pcm_hw_params_any(alsa->pcm, params));
   TRY_ALSA(snd_pcm_hw_params_set_access(
            alsa->pcm, params, SND_PCM_ACCESS_RW_INTERLEAVED));
   TRY_ALSA(snd_pcm_hw_params_set_format(alsa->pcm, params, format));
   TRY_ALSA(snd_pcm_hw_params_set_channels(alsa->pcm, params, channels));
   TRY_ALSA(snd_pcm_hw_params_set_rate(alsa->pcm, params, rate, 0));

   TRY_ALSA(snd_pcm_hw_params_set_buffer_time_near(
            alsa->pcm, params, &latency_usec, NULL));
   TRY_ALSA(snd_pcm_hw_params_set_periods_near(
            alsa->pcm, params, &periods, NULL));

   TRY_ALSA(snd_pcm_hw_params(alsa->pcm, params));

   /* Shouldn't have to bother with this, 
    * but some drivers are apparently broken. */
   if (snd_pcm_hw_params_get_period_size(params, &alsa->period_frames, NULL))
      snd_pcm_hw_params_get_period_size_min(
            params, &alsa->period_frames, NULL);
   RARCH_LOG("ALSA: Period size: %d frames\n", (int)alsa->period_frames);
   if (snd_pcm_hw_params_get_buffer_size(params, &buffer_size))
      snd_pcm_hw_params_get_buffer_size_max(params, &buffer_size);
   RARCH_LOG("ALSA: Buffer size: %d frames\n", (int)buffer_size);

   alsa->buffer_size = snd_pcm_frames_to_bytes(alsa->pcm, buffer_size);
   alsa->period_size = snd_pcm_frames_to_bytes(alsa->pcm, alsa->period_frames);

   TRY_ALSA(snd_pcm_sw_params_malloc(&sw_params));
   TRY_ALSA(snd_pcm_sw_params_current(alsa->pcm, sw_params));
   TRY_ALSA(snd_pcm_sw_params_set_start_threshold(
            alsa->pcm, sw_params, buffer_size / 2));
   TRY_ALSA(snd_pcm_sw_params(alsa->pcm, sw_params));

   snd_pcm_hw_params_free(params);
   snd_pcm_sw_params_free(sw_params);

   alsa->fifo_lock = slock_new();
   alsa->cond_lock = slock_new();
   alsa->cond = scond_new();
   alsa->buffer = fifo_new(alsa->buffer_size);
   if (!alsa->fifo_lock || !alsa->cond_lock || !alsa->cond || !alsa->buffer)
      goto error;

   alsa->worker_thread = sthread_create(alsa_worker_thread, alsa);
   if (!alsa->worker_thread)
   {
      RARCH_ERR("error initializing worker thread");
      goto error;
   }

   return alsa;

error:
   RARCH_ERR("ALSA: Failed to initialize...\n");
   if (params)
      snd_pcm_hw_params_free(params);

   if (sw_params)
      snd_pcm_sw_params_free(sw_params);

   alsa_thread_free(alsa);

   return NULL;
}

static bool create_softfilter_graph(rarch_softfilter_t *filt,
      enum retro_pixel_format in_pixel_format,
      unsigned max_width, unsigned max_height,
      softfilter_simd_mask_t cpu_features,
      unsigned threads)
{
   unsigned input_fmts, input_fmt, output_fmts, i = 0;
   struct config_file_userdata userdata;
   char key[64], name[64];

   (void)i;

   key[0] = name[0] = '\0';

   snprintf(key, sizeof(key), "filter");

   if (!config_get_array(filt->conf, key, name, sizeof(name)))
   {
      RARCH_ERR("Could not find 'filter' array in config.\n");
      return false;
   }

   if (filt->num_plugs == 0)
   {
      RARCH_ERR("No filter plugs found. Exiting...\n");
      return false;
   }

   filt->impl = softfilter_find_implementation(filt, name);
   if (!filt->impl)
   {
      RARCH_ERR("Could not find implementation.\n");
      return false;
   }

   userdata.conf = filt->conf;
   /* Index-specific configs take priority over ident-specific. */
   userdata.prefix[0] = key;
   userdata.prefix[1] = filt->impl->short_ident;

   /* Simple assumptions. */
   filt->pix_fmt = in_pixel_format;
   input_fmts = filt->impl->query_input_formats();

   switch (in_pixel_format)
   {
      case RETRO_PIXEL_FORMAT_XRGB8888:
         input_fmt = SOFTFILTER_FMT_XRGB8888;
         break;
      case RETRO_PIXEL_FORMAT_RGB565:
         input_fmt = SOFTFILTER_FMT_RGB565;
         break;
      default:
         return false;
   }

   if (!(input_fmt & input_fmts))
   {
      RARCH_ERR("Softfilter does not support input format.\n");
      return false;
   }

   output_fmts = filt->impl->query_output_formats(input_fmt);
   /* If we have a match of input/output formats, use that. */
   if (output_fmts & input_fmt)
      filt->out_pix_fmt = in_pixel_format;
   else if (output_fmts & SOFTFILTER_FMT_XRGB8888)
      filt->out_pix_fmt = RETRO_PIXEL_FORMAT_XRGB8888;
   else if (output_fmts & SOFTFILTER_FMT_RGB565)
      filt->out_pix_fmt = RETRO_PIXEL_FORMAT_RGB565;
   else
   {
      RARCH_ERR("Did not find suitable output format for softfilter.\n");
      return false;
   }

   filt->max_width = max_width;
   filt->max_height = max_height;

   filt->impl_data = filt->impl->create(
         &softfilter_config, input_fmt, input_fmt, max_width, max_height,
         threads != RARCH_SOFTFILTER_THREADS_AUTO ? threads :
         cpu_features_get_core_amount(), cpu_features,
         &userdata);
   if (!filt->impl_data)
   {
      RARCH_ERR("Failed to create softfilter state.\n");
      return false;
   }

   threads = filt->impl->query_num_threads(filt->impl_data);
   if (!threads)
   {
      RARCH_ERR("Invalid number of threads.\n");
      return false;
   }

   filt->threads = threads;
   RARCH_LOG("Using %u threads for softfilter.\n", threads);

//.........这里部分代码省略.........

static bool load_content(const struct retro_subsystem_info *special,
      const struct string_list *content)
{
   unsigned i;
   bool ret = true;

   struct string_list* additional_path_allocs = string_list_new();

   struct retro_game_info *info = (struct retro_game_info*)
      calloc(content->size, sizeof(*info));

   if (!info)
      return false;

   for (i = 0; i < content->size; i++)
   {
      const char *path = content->elems[i].data;
      int at