static GimpTempBuf *
gimp_undo_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpUndo *undo = GIMP_UNDO (viewable);
if (undo->preview)
{
gint preview_width;
gint preview_height;
gimp_viewable_calc_preview_size (gimp_temp_buf_get_width (undo->preview),
gimp_temp_buf_get_height (undo->preview),
width,
height,
TRUE, 1.0, 1.0,
&preview_width,
&preview_height,
NULL);
if (preview_width < gimp_temp_buf_get_width (undo->preview) &&
preview_height < gimp_temp_buf_get_height (undo->preview))
{
return gimp_temp_buf_scale (undo->preview,
preview_width, preview_height);
}
return gimp_temp_buf_copy (undo->preview);
}
return NULL;
}
static void
gimp_view_renderer_buffer_render (GimpViewRenderer *renderer,
GtkWidget *widget)
{
gint buffer_width;
gint buffer_height;
gint view_width;
gint view_height;
gboolean scaling_up;
GimpTempBuf *render_buf = NULL;
gimp_viewable_get_size (renderer->viewable, &buffer_width, &buffer_height);
gimp_viewable_calc_preview_size (buffer_width,
buffer_height,
renderer->width,
renderer->height,
TRUE, 1.0, 1.0,
&view_width,
&view_height,
&scaling_up);
if (scaling_up)
{
GimpTempBuf *temp_buf;
temp_buf = gimp_viewable_get_new_preview (renderer->viewable,
renderer->context,
buffer_width, buffer_height);
if (temp_buf)
{
render_buf = gimp_temp_buf_scale (temp_buf, view_width, view_height);
gimp_temp_buf_unref (temp_buf);
}
}
else
{
render_buf = gimp_viewable_get_new_preview (renderer->viewable,
renderer->context,
view_width, view_height);
}
if (render_buf)
{
gimp_view_renderer_render_temp_buf_simple (renderer, render_buf);
gimp_temp_buf_unref (render_buf);
}
else /* no preview available */
{
const gchar *icon_name;
icon_name = gimp_viewable_get_icon_name (renderer->viewable);
gimp_view_renderer_render_icon (renderer, widget, icon_name);
}
}
static void
gimp_view_renderer_image_render (GimpViewRenderer *renderer,
GtkWidget *widget)
{
GimpViewRendererImage *rendererimage = GIMP_VIEW_RENDERER_IMAGE (renderer);
GimpImage *image = GIMP_IMAGE (renderer->viewable);
const gchar *icon_name;
/* The conditions checked here are mostly a hack to hide the fact that
* we are creating the channel preview from the image preview and turning
* off visibility of a channel has the side-effect of painting the channel
* preview all black. See bug #459518 for details.
*/
if (rendererimage->channel == -1 ||
(gimp_image_get_component_visible (image, rendererimage->channel) &&
gimp_image_get_component_visible (image, GIMP_ALPHA_CHANNEL)))
{
gint view_width;
gint view_height;
gdouble xres;
gdouble yres;
gboolean scaling_up;
GimpTempBuf *render_buf = NULL;
gimp_image_get_resolution (image, &xres, &yres);
gimp_viewable_calc_preview_size (gimp_image_get_width (image),
gimp_image_get_height (image),
renderer->width,
renderer->height,
renderer->dot_for_dot,
xres,
yres,
&view_width,
&view_height,
&scaling_up);
if (scaling_up)
{
GimpTempBuf *temp_buf;
temp_buf = gimp_viewable_get_new_preview (renderer->viewable,
renderer->context,
gimp_image_get_width (image),
gimp_image_get_height (image));
if (temp_buf)
{
render_buf = gimp_temp_buf_scale (temp_buf,
view_width, view_height);
gimp_temp_buf_unref (temp_buf);
}
}
else
{
render_buf = gimp_viewable_get_new_preview (renderer->viewable,
renderer->context,
view_width,
view_height);
}
if (render_buf)
{
gint render_buf_x = 0;
gint render_buf_y = 0;
gint component_index = -1;
/* xresolution != yresolution */
if (view_width > renderer->width || view_height > renderer->height)
{
GimpTempBuf *temp_buf;
temp_buf = gimp_temp_buf_scale (render_buf,
renderer->width, renderer->height);
gimp_temp_buf_unref (render_buf);
render_buf = temp_buf;
}
if (view_width < renderer->width)
render_buf_x = (renderer->width - view_width) / 2;
if (view_height < renderer->height)
render_buf_y = (renderer->height - view_height) / 2;
if (rendererimage->channel != -1)
component_index =
gimp_image_get_component_index (image, rendererimage->channel);
gimp_view_renderer_render_temp_buf (renderer, widget, render_buf,
render_buf_x, render_buf_y,
component_index,
GIMP_VIEW_BG_CHECKS,
GIMP_VIEW_BG_WHITE);
gimp_temp_buf_unref (render_buf);
return;
}
}
switch (rendererimage->channel)
{
case GIMP_RED_CHANNEL: icon_name = GIMP_STOCK_CHANNEL_RED; break;
case GIMP_GREEN_CHANNEL: icon_name = GIMP_STOCK_CHANNEL_GREEN; break;
case GIMP_BLUE_CHANNEL: icon_name = GIMP_STOCK_CHANNEL_BLUE; break;
case GIMP_GRAY_CHANNEL: icon_name = GIMP_STOCK_CHANNEL_GRAY; break;
case GIMP_INDEXED_CHANNEL: icon_name = GIMP_STOCK_CHANNEL_INDEXED; break;
case GIMP_ALPHA_CHANNEL: icon_name = GIMP_STOCK_CHANNEL_ALPHA; break;
default:
icon_name = gimp_viewable_get_icon_name (renderer->viewable);
break;
}
gimp_view_renderer_render_icon (renderer, widget, icon_name);
}
