6.7. Sombra projetada

6.7.1. Visão geral

Figura 17.120. Exemplo para o filtro Sombra projetada

Exemplo para o filtro Sombra projetada

A imagem original

Exemplo para o filtro Sombra projetada

Using the GEGL Drop Shadow


With this GEGL filter you can add a drop-shadow to an image, a selection or a text. You may choose the color, position, and size of the shadow.

6.7.2. Ativar o filtro

You can find this filter in the image menu menu through FiltersLight and ShadowDrop Shadow….

This filter is normally disabled. You must add an Alpha channel to your image to use it.

6.7.3. Opções

Figura 17.121. Opções do filtro Sombra projetada

Opções do filtro Sombra projetada

Presets, Preview, Split view
[Nota] Nota

These options are described in Seção 2, “Common Features”.

X, Y

A camada que contém a sombra será movida horizontalmente por X pixels e verticalmente por Y pixels. Assim, o deslocamento X e Y determina, onde a sombra será colocada em relação à imagem original.Valores altos fazem parecer que a imagem está flutuando mais longe do fundo, e valores próximos fazem a imagem parecer estar flutuando logo acima do fundo.

Os deslocamentos podem ser negativos, levando a sombra para a esquerda da seleção se o deslocamento X for menor que 0, ou acima da mesma se o deslocamento Y for menor que 0.

Out of sheer curiosity, you can see the drop shadow layer clearly by setting blur radius to 0 and moving the drop shadow with X and Y.

Raio do desfocamento

After creating the shadow, a Gaussian blur with the specified radius is applied to the shadow layer, resulting in the realistic appearance of the drop shadow.

Cor

The shadow may have any color. Just click on the color swatch, and select a color when the color selector pops up or use the eye-dropper.

Opacidade

Shadow opacity. It defaults to 0.500, but you may select any other value from 0 (full transparency) to 2.00 (full opacity) here.

6.7.4. Using Drop Shadow Filter

This GEGL Drop Shadow filter is surprising: if you apply the filter directly to the image as you do with the legacy filter, you get nothing!

To get the same result as the legacy filter:

  1. Open your original image.

  2. Open a new image, a little bigger than your original image, filled with transparency.

  3. Copy your original image and paste it into the new image. A floating selection is created in the layer dialog.

  4. Anchor the floating selection.

  5. Menus/Layer/Crop to content.

  6. Menus/Layer/Layer boundary size: set layer size to the same size than your image and filled with transparency; click on the Center button. Then click on the Resize button.

  7. Open the Drop Shadow dialog: the drop shadow is displayed in the on-canvas preview. You can change the default options values.

  8. Eventually, add a new layer, with the same size as the image and filled with the color you want to give to the background. Move this layer to the bottom of the layer stack.

  9. Click on the OK to apply filter.

Applying filter to a selection:

  1. Open your original image.

  2. Open a new image, the same size as your original image, filled with transparency.

  3. Create the selection

  4. Copy the selection and paste it into the new image. A floating selection is created in the layer dialog.

  5. Anchor the floating selection.

  6. Menus/Layer/Crop to content.

  7. Menus/Layer/Layer to image size (with transparency).

  8. Open the Drop Shadow dialog: the drop shadow is displayed in the on-canvas preview. You can change the default options values.

  9. Eventually, add a new layer, with the same size as the image and filled with the color you want to give to the background. Move this layer to the bottom of the layer stack.

    You can also use your original image as background: undo the selection, copy the image and paste it as new layer in the new image. Move the new layer to the bottom of the layer stack.

  10. Click on the OK to apply filter.

Applying filter to a text:

The procedure is more simple to create a drop shadow for a text: create the text and apply the Drop Shadow filter directly.