C++ GstGLFuncs::GetString方法代码示例

本文整理汇总了C++中GstGLFuncs::GetString方法的典型用法代码示例。如果您正苦于以下问题：C++ GstGLFuncs::GetString方法的具体用法？C++ GstGLFuncs::GetString怎么用？C++ GstGLFuncs::GetString使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类GstGLFuncs的用法示例。

在下文中一共展示了GstGLFuncs::GetString方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1:

/**
 * gst_gl_context_fill_info:
 * @context: a #GstGLContext:
 *
 * Fills @context's info (version, extensions, vtable, etc) from the GL
 * context in the current thread.  Typically used with wrapped contexts to
 * allow wrapped contexts to be used as regular #GstGLContext's.
 *
 * Since: 1.6
 */
gboolean
gst_gl_context_fill_info (GstGLContext * context, GError ** error)
{
  GstGLFuncs *gl;
  GString *ext_g_str = NULL;
  const gchar *ext_const_c_str = NULL;
  GstGLAPI gl_api;
  gboolean ret;

  g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
  g_return_val_if_fail (context->priv->active_thread == g_thread_self (),
      FALSE);

  gl = context->gl_vtable;
  gl_api = gst_gl_context_get_gl_api (context);

  gl->GetError = gst_gl_context_get_proc_address (context, "glGetError");
  gl->GetString = gst_gl_context_get_proc_address (context, "glGetString");
  gl->GetStringi = gst_gl_context_get_proc_address (context, "glGetStringi");
  gl->GetIntegerv = gst_gl_context_get_proc_address (context, "glGetIntegerv");

  if (!gl->GetError || !gl->GetString) {
    g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
        "could not GetProcAddress core opengl functions");
    goto failure;
  }

  /* gl api specific code */
  ret = _create_context_info (context, gl_api, &context->priv->gl_major,
      &context->priv->gl_minor, error);

  if (!ret) {
    g_assert (error == NULL || *error != NULL);
    goto failure;
  }

  /* GL core contexts and GLES3 */
  if (gl->GetIntegerv && gl->GetStringi && context->priv->gl_major >= 3)
    ext_g_str = _build_extension_string (context);

  if (ext_g_str && ext_g_str->len) {
    GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_g_str->str);
    _gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
        context->priv->gl_minor, ext_g_str->str);

    context->priv->gl_exts = g_string_free (ext_g_str, FALSE);
  } else {
    ext_const_c_str = (const gchar *) gl->GetString (GL_EXTENSIONS);
    if (!ext_const_c_str)
      ext_const_c_str = "";

    GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_const_c_str);
    _gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
        context->priv->gl_minor, ext_const_c_str);

    context->priv->gl_exts = g_strdup (ext_const_c_str);
  }

  if (gl_api & GST_GL_API_OPENGL3
      && !gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 4, 1)
      && !gst_gl_check_extension ("GL_ARB_ES2_compatibility",
          context->priv->gl_exts)) {
    g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
        "An opengl3 context created but the required ES2 compatibility was not found");
    goto failure;
  }

  /* Does not implement OES_vertex_array_object properly, see
   * https://bugzilla.gnome.org/show_bug.cgi?id=750185 */
  if (g_strcmp0 ((const gchar *) gl->GetString (GL_VENDOR),
          "Imagination Technologies") == 0
      && g_strcmp0 ((const gchar *) gl->GetString (GL_RENDERER),
          "PowerVR SGX 544MP") == 0) {
    gl->GenVertexArrays = NULL;
    gl->DeleteVertexArrays = NULL;
    gl->BindVertexArray = NULL;
    gl->IsVertexArray = NULL;
  }

  return TRUE;

failure:
  return FALSE;
}

开发者ID:ndufresne，项目名称:gst-plugins-bad，代码行数:94，代码来源:gstglcontext.c

示例2: api


//.........这里部分代码省略.........
  GST_INFO ("created context");

  if (!context_class->activate (context, TRUE)) {
    g_set_error (error, GST_GL_CONTEXT_ERROR,
        GST_GL_CONTEXT_ERROR_RESOURCE_UNAVAILABLE,
        "Failed to activate the GL Context");
    g_free (compiled_api_s);
    g_free (user_api_string);
    goto failure;
  }

  gl_api = gst_gl_context_get_gl_api (context);
  g_assert (gl_api != GST_GL_API_NONE && gl_api != GST_GL_API_ANY);

  api_string = gst_gl_api_to_string (gl_api);
  GST_INFO ("available GL APIs: %s", api_string);

  if (((compiled_api & gl_api) & user_api) == GST_GL_API_NONE) {
    g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_WRONG_API,
        "failed to create context, context "
        "could not provide correct api. user (%s), compiled (%s), context (%s)",
        user_api_string, compiled_api_s, api_string);
    g_free (api_string);
    g_free (compiled_api_s);
    g_free (user_api_string);
    goto failure;
  }

  g_free (api_string);
  g_free (compiled_api_s);
  g_free (user_api_string);

  gl->GetError = gst_gl_context_get_proc_address (context, "glGetError");
  gl->GetString = gst_gl_context_get_proc_address (context, "glGetString");
  gl->GetStringi = gst_gl_context_get_proc_address (context, "glGetStringi");
  gl->GetIntegerv = gst_gl_context_get_proc_address (context, "glGetIntegerv");

  if (!gl->GetError || !gl->GetString) {
    g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
        "could not GetProcAddress core opengl functions");
    goto failure;
  }

  /* gl api specific code */
  ret = _create_context_info (context, gl_api, &context->priv->gl_major,
      &context->priv->gl_minor, error);

  if (!ret) {
    g_assert (error == NULL || *error != NULL);
    goto failure;
  }

  /* GL core contexts and GLES3 */
  if (gl->GetIntegerv && gl->GetStringi && context->priv->gl_major >= 3)
    ext_g_str = _build_extension_string (context);

  if (ext_g_str && ext_g_str->len) {
    GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_g_str->str);
    _gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
        context->priv->gl_minor, ext_g_str->str);

    context->priv->gl_exts = g_string_free (ext_g_str, FALSE);
  } else {
    ext_const_c_str = (const gchar *) gl->GetString (GL_EXTENSIONS);
    if (!ext_const_c_str)
      ext_const_c_str = "";

开发者ID:Lachann，项目名称:gst-plugins-bad，代码行数:67，代码来源:gstglcontext.c

示例3:

/**
 * gst_gl_context_fill_info:
 * @context: a #GstGLContext:
 *
 * Fills @context's info (version, extensions, vtable, etc) from the GL
 * context in the current thread.  Typically used with wrapped contexts to
 * allow wrapped contexts to be used as regular #GstGLContext's.
 *
 * Since: 1.6
 */
gboolean
gst_gl_context_fill_info (GstGLContext * context, GError ** error)
{
  GstGLFuncs *gl;
  GString *ext_g_str = NULL;
  const gchar *ext_const_c_str = NULL;
  GstGLAPI gl_api;
  gboolean ret;

  g_return_val_if_fail (GST_GL_IS_CONTEXT (context), FALSE);
  g_return_val_if_fail (context->priv->active_thread == g_thread_self (),
      FALSE);

  gl = context->gl_vtable;
  gl_api = gst_gl_context_get_gl_api (context);

  gl->GetError = gst_gl_context_get_proc_address (context, "glGetError");
  gl->GetString = gst_gl_context_get_proc_address (context, "glGetString");
  gl->GetStringi = gst_gl_context_get_proc_address (context, "glGetStringi");
  gl->GetIntegerv = gst_gl_context_get_proc_address (context, "glGetIntegerv");

  if (!gl->GetError || !gl->GetString) {
    g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
        "could not GetProcAddress core opengl functions");
    goto failure;
  }

  /* gl api specific code */
  ret = _create_context_info (context, gl_api, &context->priv->gl_major,
      &context->priv->gl_minor, error);

  if (!ret) {
    g_assert (error == NULL || *error != NULL);
    goto failure;
  }

  /* GL core contexts and GLES3 */
  if (gl->GetIntegerv && gl->GetStringi && context->priv->gl_major >= 3)
    ext_g_str = _build_extension_string (context);

  if (ext_g_str && ext_g_str->len) {
    GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_g_str->str);
    _gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
        context->priv->gl_minor, ext_g_str->str);

    context->priv->gl_exts = g_string_free (ext_g_str, FALSE);
  } else {
    ext_const_c_str = (const gchar *) gl->GetString (GL_EXTENSIONS);
    if (!ext_const_c_str)
      ext_const_c_str = "";

    GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_const_c_str);
    _gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
        context->priv->gl_minor, ext_const_c_str);

    context->priv->gl_exts = g_strdup (ext_const_c_str);
  }

  if (gl_api & GST_GL_API_OPENGL3
      && !gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 4, 1)
      && !gst_gl_check_extension ("GL_ARB_ES2_compatibility",
          context->priv->gl_exts)) {
    g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
        "An opengl3 context created but the required ES2 compatibility was not found");
    goto failure;
  }

  return TRUE;

failure:
  return FALSE;
}

开发者ID:ramaxlo，项目名称:gst-plugins-bad，代码行数:82，代码来源:gstglcontext.c

注：本文中的GstGLFuncs::GetString方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。