C++ (Cpp) gst_gl_shader_attach Examples

Example #1

static void
_compile_shader (GstGLContext * context, struct _compile_shader *data)
{
  GstGLShader *shader;
  GstGLSLStage *vert, *frag;
  GError *error = NULL;

  shader = gst_gl_shader_new (context);

  if (data->vertex_src) {
    vert = gst_glsl_stage_new_with_string (context, GL_VERTEX_SHADER,
        GST_GLSL_VERSION_NONE,
        GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY, data->vertex_src);
    if (!gst_glsl_stage_compile (vert, &error)) {
      GST_ERROR_OBJECT (vert, "%s", error->message);
      gst_object_unref (vert);
      gst_object_unref (shader);
      return;
    }
    if (!gst_gl_shader_attach (shader, vert)) {
      gst_object_unref (shader);
      return;
    }
  }

  if (data->fragment_src) {
    frag = gst_glsl_stage_new_with_string (context, GL_FRAGMENT_SHADER,
        GST_GLSL_VERSION_NONE,
        GST_GLSL_PROFILE_ES | GST_GLSL_PROFILE_COMPATIBILITY,
        data->fragment_src);
    if (!gst_glsl_stage_compile (frag, &error)) {
      GST_ERROR_OBJECT (frag, "%s", error->message);
      gst_object_unref (frag);
      gst_object_unref (shader);
      return;
    }
    if (!gst_gl_shader_attach (shader, frag)) {
      gst_object_unref (shader);
      return;
    }
  }

  if (!gst_gl_shader_link (shader, &error)) {
    GST_ERROR_OBJECT (shader, "%s", error->message);
    g_error_free (error);
    error = NULL;
    gst_gl_context_clear_shader (context);
    gst_object_unref (shader);
    return;
  }

  *data->shader = shader;
}

Example #2

File: gstglshader.c Project: thaytan/gst-plugins-base

static void
_test_separate_compile_attach_gl (GstGLContext * context, gpointer data)
{
  GstGLShader *shader;
  GstGLSLStage *vert;
  GError *error = NULL;

  shader = gst_gl_shader_new (context);
  vert = gst_glsl_stage_new_default_vertex (context);

  fail_unless (gst_glsl_stage_compile (vert, &error));
  fail_unless (gst_gl_shader_attach (shader, vert));
  fail_unless (gst_gl_shader_attach (shader, vert));

  gst_object_unref (shader);
}

Example #3

File: gstglshader.c Project: thaytan/gst-plugins-base

/**
 * gst_gl_shader_compile_attach_stage:
 * @shader: a #GstGLShader
 * @stage: a #GstGLSLStage to attach
 * @error: a #GError
 *
 * Compiles @stage and attaches it to @shader.
 *
 * Note: must be called in the GL thread
 *
 * Returns: whether @stage could be compiled and attached to @shader
 *
 * Since: 1.8
 */
gboolean
gst_gl_shader_compile_attach_stage (GstGLShader * shader, GstGLSLStage * stage,
    GError ** error)
{
  g_return_val_if_fail (GST_IS_GLSL_STAGE (stage), FALSE);

  if (!gst_glsl_stage_compile (stage, error)) {
    return FALSE;
  }

  if (!gst_gl_shader_attach (shader, stage)) {
    g_set_error (error, GST_GLSL_ERROR, GST_GLSL_ERROR_COMPILE,
        "Failed to attach stage to shader");
    return FALSE;
  }

  return TRUE;
}

Example #4

File: gstglshader.c Project: thaytan/gst-plugins-base

static GstGLShader *
_new_with_stages_va_list (GstGLContext * context, GError ** error,
    va_list varargs)
{
  GstGLShader *shader;
  GstGLSLStage *stage;
  gboolean to_unref_and_out = FALSE;

  g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);

  shader = g_object_new (GST_TYPE_GL_SHADER, NULL);
  gst_object_ref_sink (shader);
  shader->context = gst_object_ref (context);

  while ((stage = va_arg (varargs, GstGLSLStage *))) {
    if (to_unref_and_out) {
      gst_object_unref (stage);
      continue;
    }

    if (!gst_glsl_stage_compile (stage, error)) {
      gst_object_unref (stage);
      to_unref_and_out = TRUE;
      continue;
    }
    if (!gst_gl_shader_attach (shader, stage)) {
      g_set_error (error, GST_GLSL_ERROR, GST_GLSL_ERROR_PROGRAM,
          "Failed to attach stage to program");
      to_unref_and_out = TRUE;
      continue;
    }
  }

  if (to_unref_and_out) {
    gst_object_unref (shader);
    return NULL;
  }

  return shader;
}