themingbackground: Restructure code
Make if statements encompassing the whole function into early returns. The rest of the diff is reindenting.
This commit is contained in:
Benjamin Otte
parent
016647edb1
commit
ce56248930
@ -149,156 +149,156 @@ _gtk_theming_background_paint_layer (GtkThemingBackground *bg,
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GtkThemingBackgroundLayer *layer,
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cairo_t *cr)
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{
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GtkCssRepeatStyle hrepeat, vrepeat;
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const GtkCssValue *pos, *repeat;
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double image_width, image_height;
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double width, height;
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if (layer->image == NULL
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|| layer->image_rect.width <= 0
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|| layer->image_rect.height <= 0)
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return;
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cairo_save (cr);
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_gtk_rounded_box_path (&layer->clip_box, cr);
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cairo_clip (cr);
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if (layer->image
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&& layer->image_rect.width > 0
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&& layer->image_rect.height > 0)
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pos = _gtk_css_array_value_get_nth (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_POSITION), layer->idx);
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repeat = _gtk_css_array_value_get_nth (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_REPEAT), layer->idx);
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hrepeat = _gtk_css_background_repeat_value_get_x (repeat);
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vrepeat = _gtk_css_background_repeat_value_get_y (repeat);
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width = layer->image_rect.width;
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height = layer->image_rect.height;
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_gtk_css_bg_size_value_compute_size (_gtk_css_array_value_get_nth (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_SIZE), layer->idx),
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layer->image,
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width,
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height,
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&image_width,
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&image_height);
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/* optimization */
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if (image_width == width)
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hrepeat = GTK_CSS_REPEAT_STYLE_NO_REPEAT;
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if (image_height == height)
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vrepeat = GTK_CSS_REPEAT_STYLE_NO_REPEAT;
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cairo_translate (cr, layer->image_rect.x, layer->image_rect.y);
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if (hrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT && vrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT)
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{
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const GtkCssValue *pos, *repeat;
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double image_width, image_height;
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double width, height;
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GtkCssRepeatStyle hrepeat, vrepeat;
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cairo_translate (cr,
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_gtk_css_position_value_get_x (pos, width - image_width),
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_gtk_css_position_value_get_y (pos, height - image_height));
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/* shortcut for normal case */
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_gtk_css_image_draw (layer->image, cr, image_width, image_height);
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}
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else
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{
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int surface_width, surface_height;
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cairo_rectangle_t fill_rect;
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cairo_surface_t *surface;
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cairo_t *cr2;
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pos = _gtk_css_array_value_get_nth (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_POSITION), layer->idx);
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repeat = _gtk_css_array_value_get_nth (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_REPEAT), layer->idx);
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hrepeat = _gtk_css_background_repeat_value_get_x (repeat);
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vrepeat = _gtk_css_background_repeat_value_get_y (repeat);
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width = layer->image_rect.width;
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height = layer->image_rect.height;
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_gtk_css_bg_size_value_compute_size (_gtk_css_array_value_get_nth (_gtk_style_context_peek_property (bg->context, GTK_CSS_PROPERTY_BACKGROUND_SIZE), layer->idx),
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layer->image,
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width,
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height,
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&image_width,
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&image_height);
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/* optimization */
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if (image_width == width)
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hrepeat = GTK_CSS_REPEAT_STYLE_NO_REPEAT;
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if (image_height == height)
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vrepeat = GTK_CSS_REPEAT_STYLE_NO_REPEAT;
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cairo_translate (cr, layer->image_rect.x, layer->image_rect.y);
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if (hrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT && vrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT)
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/* If ‘background-repeat’ is ‘round’ for one (or both) dimensions,
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* there is a second step. The UA must scale the image in that
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* dimension (or both dimensions) so that it fits a whole number of
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* times in the background positioning area. In the case of the width
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* (height is analogous):
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*
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* If X ≠ 0 is the width of the image after step one and W is the width
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* of the background positioning area, then the rounded width
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* X' = W / round(W / X) where round() is a function that returns the
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* nearest natural number (integer greater than zero).
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*
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* If ‘background-repeat’ is ‘round’ for one dimension only and if
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* ‘background-size’ is ‘auto’ for the other dimension, then there is
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* a third step: that other dimension is scaled so that the original
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* aspect ratio is restored.
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*/
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if (hrepeat == GTK_CSS_REPEAT_STYLE_ROUND)
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{
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cairo_translate (cr,
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_gtk_css_position_value_get_x (pos, width - image_width),
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_gtk_css_position_value_get_y (pos, height - image_height));
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/* shortcut for normal case */
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_gtk_css_image_draw (layer->image, cr, image_width, image_height);
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double n = round (width / image_width);
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n = MAX (1, n);
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if (vrepeat != GTK_CSS_REPEAT_STYLE_ROUND
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/* && vsize == auto (it is by default) */)
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image_height *= width / (image_width * n);
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image_width = width / n;
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}
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if (vrepeat == GTK_CSS_REPEAT_STYLE_ROUND)
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{
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double n = round (height / image_height);
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n = MAX (1, n);
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if (hrepeat != GTK_CSS_REPEAT_STYLE_ROUND
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/* && hsize == auto (it is by default) */)
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image_width *= height / (image_height * n);
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image_height = height / n;
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}
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/* if hrepeat or vrepeat is 'space', we create a somewhat larger surface
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* to store the extra space. */
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if (hrepeat == GTK_CSS_REPEAT_STYLE_SPACE)
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{
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double n = floor (width / image_width);
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surface_width = n ? round (width / n) : 0;
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}
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else
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surface_width = round (image_width);
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if (vrepeat == GTK_CSS_REPEAT_STYLE_SPACE)
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{
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double n = floor (height / image_height);
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surface_height = n ? round (height / n) : 0;
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}
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else
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surface_height = round (image_height);
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surface = cairo_surface_create_similar (cairo_get_target (cr),
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CAIRO_CONTENT_COLOR_ALPHA,
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surface_width, surface_height);
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cr2 = cairo_create (surface);
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cairo_translate (cr2,
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0.5 * (surface_width - image_width),
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0.5 * (surface_height - image_height));
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_gtk_css_image_draw (layer->image, cr2, image_width, image_height);
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cairo_destroy (cr2);
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cairo_set_source_surface (cr, surface,
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_gtk_css_position_value_get_x (pos, width - image_width),
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_gtk_css_position_value_get_y (pos, height - image_height));
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cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
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cairo_surface_destroy (surface);
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if (hrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT)
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{
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fill_rect.x = _gtk_css_position_value_get_x (pos, width - image_width);
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fill_rect.width = image_width;
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}
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else
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{
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int surface_width, surface_height;
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cairo_rectangle_t fill_rect;
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cairo_surface_t *surface;
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cairo_t *cr2;
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/* If ‘background-repeat’ is ‘round’ for one (or both) dimensions,
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* there is a second step. The UA must scale the image in that
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* dimension (or both dimensions) so that it fits a whole number of
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* times in the background positioning area. In the case of the width
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* (height is analogous):
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*
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* If X ≠ 0 is the width of the image after step one and W is the width
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* of the background positioning area, then the rounded width
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* X' = W / round(W / X) where round() is a function that returns the
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* nearest natural number (integer greater than zero).
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*
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* If ‘background-repeat’ is ‘round’ for one dimension only and if
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* ‘background-size’ is ‘auto’ for the other dimension, then there is
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* a third step: that other dimension is scaled so that the original
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* aspect ratio is restored.
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*/
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if (hrepeat == GTK_CSS_REPEAT_STYLE_ROUND)
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{
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double n = round (width / image_width);
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n = MAX (1, n);
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if (vrepeat != GTK_CSS_REPEAT_STYLE_ROUND
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/* && vsize == auto (it is by default) */)
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image_height *= width / (image_width * n);
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image_width = width / n;
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}
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if (vrepeat == GTK_CSS_REPEAT_STYLE_ROUND)
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{
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double n = round (height / image_height);
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n = MAX (1, n);
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if (hrepeat != GTK_CSS_REPEAT_STYLE_ROUND
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/* && hsize == auto (it is by default) */)
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image_width *= height / (image_height * n);
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image_height = height / n;
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}
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/* if hrepeat or vrepeat is 'space', we create a somewhat larger surface
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* to store the extra space. */
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if (hrepeat == GTK_CSS_REPEAT_STYLE_SPACE)
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{
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double n = floor (width / image_width);
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surface_width = n ? round (width / n) : 0;
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}
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else
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surface_width = round (image_width);
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if (vrepeat == GTK_CSS_REPEAT_STYLE_SPACE)
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{
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double n = floor (height / image_height);
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surface_height = n ? round (height / n) : 0;
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}
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else
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surface_height = round (image_height);
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surface = cairo_surface_create_similar (cairo_get_target (cr),
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CAIRO_CONTENT_COLOR_ALPHA,
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surface_width, surface_height);
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cr2 = cairo_create (surface);
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cairo_translate (cr2,
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0.5 * (surface_width - image_width),
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0.5 * (surface_height - image_height));
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_gtk_css_image_draw (layer->image, cr2, image_width, image_height);
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cairo_destroy (cr2);
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cairo_set_source_surface (cr, surface,
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_gtk_css_position_value_get_x (pos, width - image_width),
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_gtk_css_position_value_get_y (pos, height - image_height));
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cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
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cairo_surface_destroy (surface);
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if (hrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT)
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{
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fill_rect.x = _gtk_css_position_value_get_x (pos, width - image_width);
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fill_rect.width = image_width;
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}
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else
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{
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fill_rect.x = 0;
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fill_rect.width = width;
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}
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if (vrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT)
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{
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fill_rect.y = _gtk_css_position_value_get_y (pos, height - image_height);
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fill_rect.height = image_height;
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}
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else
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{
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fill_rect.y = 0;
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fill_rect.height = height;
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}
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cairo_rectangle (cr, fill_rect.x, fill_rect.y,
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fill_rect.width, fill_rect.height);
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cairo_fill (cr);
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fill_rect.x = 0;
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fill_rect.width = width;
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}
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if (vrepeat == GTK_CSS_REPEAT_STYLE_NO_REPEAT)
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{
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fill_rect.y = _gtk_css_position_value_get_y (pos, height - image_height);
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fill_rect.height = image_height;
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}
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else
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{
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fill_rect.y = 0;
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fill_rect.height = height;
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}
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cairo_rectangle (cr, fill_rect.x, fill_rect.y,
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fill_rect.width, fill_rect.height);
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cairo_fill (cr);
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}
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cairo_restore (cr);
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