예제 #1
0
static CoglBool
_cogl_texture_driver_upload_subregion_to_gl (CoglContext *ctx,
                                             CoglTexture *texture,
                                             CoglBool is_foreign,
                                             int src_x,
                                             int src_y,
                                             int dst_x,
                                             int dst_y,
                                             int width,
                                             int height,
                                             int level,
                                             CoglBitmap *source_bmp,
				             GLuint source_gl_format,
				             GLuint source_gl_type,
                                             CoglError **error)
{
  GLenum gl_target;
  GLuint gl_handle;
  uint8_t *data;
  CoglPixelFormat source_format = cogl_bitmap_get_format (source_bmp);
  int bpp = _cogl_pixel_format_get_bytes_per_pixel (source_format);
  CoglBitmap *slice_bmp;
  int rowstride;
  CoglBool status = TRUE;
  CoglError *internal_error = NULL;
  int level_width;
  int level_height;

  cogl_texture_get_gl_texture (texture, &gl_handle, &gl_target);

  /* If we have the GL_EXT_unpack_subimage extension then we can
     upload from subregions directly. Otherwise we may need to copy
     the bitmap */
  if (!_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_UNPACK_SUBIMAGE) &&
      (src_x != 0 || src_y != 0 ||
       width != cogl_bitmap_get_width (source_bmp) ||
       height != cogl_bitmap_get_height (source_bmp)))
    {
      slice_bmp =
        _cogl_bitmap_new_with_malloc_buffer (ctx,
                                             width, height,
                                             source_format,
                                             error);
      if (!slice_bmp)
        return FALSE;

      if (!_cogl_bitmap_copy_subregion (source_bmp,
                                        slice_bmp,
                                        src_x, src_y,
                                        0, 0, /* dst_x/y */
                                        width, height,
                                        error))
        {
          cogl_object_unref (slice_bmp);
          return FALSE;
        }

      src_x = src_y = 0;
    }
  else
    {
      slice_bmp = prepare_bitmap_alignment_for_upload (ctx, source_bmp, error);
      if (!slice_bmp)
        return FALSE;
    }

  rowstride = cogl_bitmap_get_rowstride (slice_bmp);

  /* Setup gl alignment to match rowstride and top-left corner */
  prep_gl_for_pixels_upload_full (ctx, rowstride, src_x, src_y, bpp);

  data = _cogl_bitmap_gl_bind (slice_bmp, COGL_BUFFER_ACCESS_READ, 0, &internal_error);

  /* NB: _cogl_bitmap_gl_bind() may return NULL when successfull so we
   * have to explicitly check the cogl error pointer to catch
   * problems... */
  if (internal_error)
    {
      _cogl_propagate_error (error, internal_error);
      cogl_object_unref (slice_bmp);
      return FALSE;
    }

  _cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);

  /* Clear any GL errors */
  _cogl_gl_util_clear_gl_errors (ctx);

  _cogl_texture_get_level_size (texture,
                                level,
                                &level_width,
                                &level_height,
                                NULL);

  if (level_width == width && level_height == height)
    {
      /* GL gets upset if you use glTexSubImage2D to define the
       * contents of a mipmap level so we make sure to use
       * glTexImage2D if we are uploading a full mipmap level.
       */
      ctx->glTexImage2D (gl_target,
                         level,
                         _cogl_texture_gl_get_format (texture),
                         width,
                         height,
                         0,
                         source_gl_format,
                         source_gl_type,
                         data);
    }
  else
    {
      /* GL gets upset if you use glTexSubImage2D to initialize the
       * contents of a mipmap level so if this is the first time
       * we've seen a request to upload to this level we call
       * glTexImage2D first to assert that the storage for this
       * level exists.
       */
      if (texture->max_level < level)
        {
          ctx->glTexImage2D (gl_target,
                             level,
                             _cogl_texture_gl_get_format (texture),
                             level_width,
                             level_height,
                             0,
                             source_gl_format,
                             source_gl_type,
                             NULL);
        }

      ctx->glTexSubImage2D (gl_target,
                            level,
                            dst_x, dst_y,
                            width, height,
                            source_gl_format,
                            source_gl_type,
                            data);
    }

  if (_cogl_gl_util_catch_out_of_memory (ctx, error))
    status = FALSE;

  _cogl_bitmap_gl_unbind (slice_bmp);

  cogl_object_unref (slice_bmp);

  return status;
}
예제 #2
0
CoglTexture3D *
cogl_texture_3d_new_from_data (CoglContext *context,
                               int width,
                               int height,
                               int depth,
                               CoglPixelFormat format,
                               int rowstride,
                               int image_stride,
                               const uint8_t *data,
                               CoglError **error)
{
  CoglBitmap *bitmap;
  CoglTexture3D *ret;

  _COGL_RETURN_VAL_IF_FAIL (data, NULL);
  _COGL_RETURN_VAL_IF_FAIL (format != COGL_PIXEL_FORMAT_ANY, NULL);

  /* Rowstride from width if not given */
  if (rowstride == 0)
    rowstride = width * _cogl_pixel_format_get_bytes_per_pixel (format);
  /* Image stride from height and rowstride if not given */
  if (image_stride == 0)
    image_stride = height * rowstride;

  if (image_stride < rowstride * height)
    return NULL;

  /* GL doesn't support uploading when the image_stride isn't a
     multiple of the rowstride. If this happens we'll just pack the
     image into a new bitmap. The documentation for this function
     recommends avoiding this situation. */
  if (image_stride % rowstride != 0)
    {
      uint8_t *bmp_data;
      int bmp_rowstride;
      int z, y;

      bitmap = _cogl_bitmap_new_with_malloc_buffer (context,
                                                    width,
                                                    depth * height,
                                                    format,
                                                    error);
      if (!bitmap)
        return NULL;

      bmp_data = _cogl_bitmap_map (bitmap,
                                   COGL_BUFFER_ACCESS_WRITE,
                                   COGL_BUFFER_MAP_HINT_DISCARD,
                                   error);

      if (bmp_data == NULL)
        {
          cogl_object_unref (bitmap);
          return NULL;
        }

      bmp_rowstride = cogl_bitmap_get_rowstride (bitmap);

      /* Copy all of the images in */
      for (z = 0; z < depth; z++)
        for (y = 0; y < height; y++)
          memcpy (bmp_data + (z * bmp_rowstride * height +
                              bmp_rowstride * y),
                  data + z * image_stride + rowstride * y,
                  bmp_rowstride);

      _cogl_bitmap_unmap (bitmap);
    }
  else
    bitmap = cogl_bitmap_new_for_data (context,
                                       width,
                                       image_stride / rowstride * depth,
                                       format,
                                       rowstride,
                                       (uint8_t *) data);

  ret = cogl_texture_3d_new_from_bitmap (bitmap,
                                         height,
                                         depth);

  cogl_object_unref (bitmap);

  if (ret &&
      !cogl_texture_allocate (COGL_TEXTURE (ret), error))
    {
      cogl_object_unref (ret);
      return NULL;
    }

  return ret;
}
예제 #3
0
/* the error does not contain the filename as the caller already has it */
CoglBitmap *
_cogl_bitmap_from_file (const char  *filename,
			GError     **error)
{
  CFURLRef url;
  CGImageSourceRef image_source;
  CGImageRef image;
  int save_errno;
  CFStringRef type;
  size_t width, height, rowstride;
  uint8_t *out_data;
  CGColorSpaceRef color_space;
  CGContextRef bitmap_context;
  CoglBitmap *bmp;

  _COGL_GET_CONTEXT (ctx, NULL);

  g_assert (filename != NULL);
  g_assert (error == NULL || *error == NULL);

  url = CFURLCreateFromFileSystemRepresentation (NULL,
                                                 (guchar *) filename,
                                                 strlen (filename),
                                                 false);
  image_source = CGImageSourceCreateWithURL (url, NULL);
  save_errno = errno;
  CFRelease (url);

  if (image_source == NULL)
    {
      /* doesn't exist, not readable, etc. */
      g_set_error_literal (error,
                           COGL_BITMAP_ERROR,
                           COGL_BITMAP_ERROR_FAILED,
                           g_strerror (save_errno));
      return NULL;
    }

  /* Unknown images would be cleanly caught as zero width/height below, but try
   * to provide better error message
   */
  type = CGImageSourceGetType (image_source);
  if (type == NULL)
    {
      CFRelease (image_source);
      g_set_error_literal (error,
                           COGL_BITMAP_ERROR,
                           COGL_BITMAP_ERROR_UNKNOWN_TYPE,
                           "Unknown image type");
      return NULL;
    }

  CFRelease (type);

  image = CGImageSourceCreateImageAtIndex (image_source, 0, NULL);
  CFRelease (image_source);

  width = CGImageGetWidth (image);
  height = CGImageGetHeight (image);
  if (width == 0 || height == 0)
    {
      /* incomplete or corrupt */
      CFRelease (image);
      g_set_error_literal (error,
                           COGL_BITMAP_ERROR,
                           COGL_BITMAP_ERROR_CORRUPT_IMAGE,
                           "Image has zero width or height");
      return NULL;
    }

  /* allocate buffer big enough to hold pixel data */
  bmp = _cogl_bitmap_new_with_malloc_buffer (ctx,
                                             width, height,
                                             COGL_PIXEL_FORMAT_ARGB_8888);
  rowstride = cogl_bitmap_get_rowstride (bmp);
  out_data = _cogl_bitmap_map (bmp,
                               COGL_BUFFER_ACCESS_WRITE,
                               COGL_BUFFER_MAP_HINT_DISCARD);

  /* render to buffer */
  color_space = CGColorSpaceCreateWithName (kCGColorSpaceGenericRGB);
  bitmap_context = CGBitmapContextCreate (out_data,
                                          width, height, 8,
                                          rowstride, color_space,
                                          kCGImageAlphaPremultipliedFirst);
  CGColorSpaceRelease (color_space);

  {
    const CGRect rect = {{0, 0}, {width, height}};

    CGContextDrawImage (bitmap_context, rect, image);
  }

  CGImageRelease (image);
  CGContextRelease (bitmap_context);

  _cogl_bitmap_unmap (bmp);

  /* store bitmap info */
  return bmp;
}
예제 #4
0
static void
clutter_canvas_emit_draw (ClutterCanvas *self)
{
  ClutterCanvasPrivate *priv = self->priv;
  int real_width, real_height;
  cairo_surface_t *surface;
  gboolean mapped_buffer;
  unsigned char *data;
  CoglBuffer *buffer;
  int window_scale = 1;
  gboolean res;
  cairo_t *cr;

  g_assert (priv->height > 0 && priv->width > 0);

  priv->dirty = TRUE;

  if (priv->scale_factor_set)
    window_scale = priv->scale_factor;
  else
    g_object_get (clutter_settings_get_default (),
                  "window-scaling-factor", &window_scale,
                  NULL);

  real_width = priv->width * window_scale;
  real_height = priv->height * window_scale;

  CLUTTER_NOTE (MISC, "Creating Cairo surface with size %d x %d (real: %d x %d, scale: %d)",
                priv->width, priv->height,
                real_width, real_height,
                window_scale);

  if (priv->buffer == NULL)
    {
      CoglContext *ctx;

      ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
      priv->buffer = cogl_bitmap_new_with_size (ctx,
                                                real_width,
                                                real_height,
                                                CLUTTER_CAIRO_FORMAT_ARGB32);
    }

  buffer = COGL_BUFFER (cogl_bitmap_get_buffer (priv->buffer));
  if (buffer == NULL)
    return;

  cogl_buffer_set_update_hint (buffer, COGL_BUFFER_UPDATE_HINT_DYNAMIC);

  data = cogl_buffer_map (buffer,
                          COGL_BUFFER_ACCESS_READ_WRITE,
                          COGL_BUFFER_MAP_HINT_DISCARD);

  if (data != NULL)
    {
      int bitmap_stride = cogl_bitmap_get_rowstride (priv->buffer);

      surface = cairo_image_surface_create_for_data (data,
                                                     CAIRO_FORMAT_ARGB32,
                                                     real_width,
                                                     real_height,
                                                     bitmap_stride);
      mapped_buffer = TRUE;
    }
  else
    {
      surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
                                            real_width,
                                            real_height);

      mapped_buffer = FALSE;
    }

  cairo_surface_set_device_scale (surface, window_scale, window_scale);

  self->priv->cr = cr = cairo_create (surface);

  g_signal_emit (self, canvas_signals[DRAW], 0,
                 cr, priv->width, priv->height,
                 &res);

#ifdef CLUTTER_ENABLE_DEBUG
  if (_clutter_diagnostic_enabled () && cairo_status (cr))
    {
      g_warning ("Drawing failed for <ClutterCanvas>[%p]: %s",
                 self,
                 cairo_status_to_string (cairo_status (cr)));
    }
#endif

  self->priv->cr = NULL;
  cairo_destroy (cr);

  if (mapped_buffer)
    cogl_buffer_unmap (buffer);
  else
    {
      int size = cairo_image_surface_get_stride (surface) * priv->height;
      cogl_buffer_set_data (buffer,
                            0,
                            cairo_image_surface_get_data (surface),
                            size);
    }

  cairo_surface_destroy (surface);
}