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GIMP Widgets Library Reference Manual | |
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GimpPreviewArea;
GtkWidget* gimp_preview_area_new (void);
void gimp_preview_area_draw (GimpPreviewArea *area,
gint x,
gint y,
gint width,
gint height,
GimpImageType type,
const guchar *buf,
gint rowstride);
void gimp_preview_area_fill (GimpPreviewArea *area,
gint x,
gint y,
gint width,
gint height,
guchar red,
guchar green,
guchar blue);
void gimp_preview_area_blend (GimpPreviewArea *area,
gint x,
gint y,
gint width,
gint height,
GimpImageType type,
const guchar *buf1,
gint rowstride1,
const guchar *buf2,
gint rowstride2,
guchar opacity);
void gimp_preview_area_mask (GimpPreviewArea *area,
gint x,
gint y,
gint width,
gint height,
GimpImageType type,
const guchar *buf1,
gint rowstride1,
const guchar *buf2,
gint rowstride2,
const guchar *mask,
gint rowstride_mask);
void gimp_preview_area_set_offsets (GimpPreviewArea *area,
gint x,
gint y);
void gimp_preview_area_set_colormap (GimpPreviewArea *area,
const guchar *colormap,
gint num_colors);
void gimp_preview_area_set_max_size (GimpPreviewArea *area,
gint width,
gint height);
void gimp_preview_area_menu_popup (GimpPreviewArea *area,
GdkEventButton *event);
GObject
+----GInitiallyUnowned
+----GtkObject
+----GtkWidget
+----GtkDrawingArea
+----GimpPreviewArea
GtkWidget* gimp_preview_area_new (void);
| Returns : | a new GimpPreviewArea widget. Since GIMP 2.2 |
void gimp_preview_area_draw (GimpPreviewArea *area, gint x, gint y, gint width, gint height, GimpImageType type, const guchar *buf, gint rowstride);
Draws buf on area and queues a redraw on the given rectangle.
Since GIMP 2.2
area : |
a GimpPreviewArea widget. |
x : |
x offset in preview |
y : |
y offset in preview |
width : |
buffer width |
height : |
buffer height |
type : |
the GimpImageType of buf
|
buf : |
a guchar buffer that contains the preview pixel data. |
rowstride : |
rowstride of buf
|
void gimp_preview_area_fill (GimpPreviewArea *area, gint x, gint y, gint width, gint height, guchar red, guchar green, guchar blue);
Fills area in the given color and queues a redraw on the given
rectangle.
Since GIMP 2.2
area : |
a GimpPreviewArea widget. |
x : |
x offset in preview |
y : |
y offset in preview |
width : |
buffer width |
height : |
buffer height |
red : |
red component of the fill color (0-255) |
green : |
green component of the fill color (0-255) |
blue : |
red component of the fill color (0-255) |
void gimp_preview_area_blend (GimpPreviewArea *area, gint x, gint y, gint width, gint height, GimpImageType type, const guchar *buf1, gint rowstride1, const guchar *buf2, gint rowstride2, guchar opacity);
Composites buf1 on buf2 with the given opacity, draws the result
to area and queues a redraw on the given rectangle.
Since GIMP 2.2
area : |
a GimpPreviewArea widget. |
x : |
x offset in preview |
y : |
y offset in preview |
width : |
buffer width |
height : |
buffer height |
type : |
the GimpImageType of buf1 and buf2
|
buf1 : |
a guchar buffer that contains the pixel data for the lower layer |
rowstride1 : |
rowstride of buf1
|
buf2 : |
a guchar buffer that contains the pixel data for the upper layer |
rowstride2 : |
rowstride of buf2
|
opacity : |
The opacity of the first layer. |
void gimp_preview_area_mask (GimpPreviewArea *area, gint x, gint y, gint width, gint height, GimpImageType type, const guchar *buf1, gint rowstride1, const guchar *buf2, gint rowstride2, const guchar *mask, gint rowstride_mask);
Composites buf1 on buf2 with the given mask, draws the result on
area and queues a redraw on the given rectangle.
Since GIMP 2.2
area : |
a GimpPreviewArea widget. |
x : |
x offset in preview |
y : |
y offset in preview |
width : |
buffer width |
height : |
buffer height |
type : |
the GimpImageType of buf1 and buf2
|
buf1 : |
a guchar buffer that contains the pixel data for the lower layer |
rowstride1 : |
rowstride of buf1
|
buf2 : |
a guchar buffer that contains the pixel data for the upper layer |
rowstride2 : |
rowstride of buf2
|
mask : |
a guchar buffer representing the mask of the second layer. |
rowstride_mask : |
rowstride for the mask. |
void gimp_preview_area_set_offsets (GimpPreviewArea *area, gint x, gint y);
Sets the offsets of the previewed area. This information is used when drawing the checkerboard and to determine the dither offsets.
area : |
a GimpPreviewArea |
x : |
horizontal offset |
y : |
vertical offset |
Since GIMP 2.2
void gimp_preview_area_set_colormap (GimpPreviewArea *area, const guchar *colormap, gint num_colors);
Sets the colormap for the GimpPreviewArea widget. You need to
call this function before you use gimp_preview_area_draw() with
an image type of GIMP_INDEXED_IMAGE or GIMP_INDEXEDA_IMAGE.
Since GIMP 2.2
area : |
a GimpPreviewArea |
colormap : |
a guchar buffer that contains the colormap |
num_colors : |
the number of colors in the colormap |
void gimp_preview_area_set_max_size (GimpPreviewArea *area, gint width, gint height);
Usually a GimpPreviewArea fills the size that it is allocated. This funtion allows you to limit the preview area to a maximum size. If a larger size is allocated for the widget, the preview will draw itself centered into the allocated area.
area : |
a GimpPreviewArea widget |
width : |
the maximum width in pixels or -1 to unset the limit |
height : |
the maximum height in pixels or -1 to unset the limit |
Since GIMP 2.2
void gimp_preview_area_menu_popup (GimpPreviewArea *area, GdkEventButton *event);
Creates a popup menu that allows to configure the size and type of
the checkerboard pattern that the area uses to visualize transparency.
area : |
a GimpPreviewArea |
event : |
the button event that causes the menu to popup or NULL
|
Since GIMP 2.2
check-size" property"check-size" GimpCheckSize : Read / Write
Default value: GIMP_CHECK_SIZE_MEDIUM_CHECKS
check-type" property"check-type" GimpCheckType : Read / Write
Default value: GIMP_CHECK_TYPE_GRAY_CHECKS