/* GTK - The GIMP Toolkit * Copyright (C) 2010 Carlos Garnacho * Copyright (C) 2011 Red Hat, Inc. * * Authors: Carlos Garnacho * Cosimo Cecchi * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see . */ #include #include #include #include "gtkborderimageprivate.h" #include "gtkstylepropertiesprivate.h" #include "gtkthemingengineprivate.h" /* this is in case round() is not provided by the compiler, * such as in the case of C89 compilers, like MSVC */ #include "fallback-c89.c" gboolean _gtk_border_image_init (GtkBorderImage *image, GtkThemingEngine *engine) { GtkBorder *width; image->source = g_value_get_object (_gtk_theming_engine_peek_property (engine, "border-image-source")); if (image->source == NULL) return FALSE; image->slice = *(GtkBorder *) g_value_get_boxed (_gtk_theming_engine_peek_property (engine, "border-image-slice")); width = g_value_get_boxed (_gtk_theming_engine_peek_property (engine, "border-image-width")); if (width) { image->width = *width; image->has_width = TRUE; } else image->has_width = FALSE; image->repeat = *(GtkCssBorderImageRepeat *) g_value_get_boxed ( _gtk_theming_engine_peek_property (engine, "border-image-repeat")); return TRUE; } typedef struct _GtkBorderImageSliceSize GtkBorderImageSliceSize; struct _GtkBorderImageSliceSize { double offset; double size; }; static void gtk_border_image_compute_border_size (GtkBorderImageSliceSize sizes[3], double offset, double area_size, int start_border, int end_border) { /* This code assumes area_size >= start_border + end_border */ sizes[0].offset = offset; sizes[0].size = start_border; sizes[1].offset = offset + start_border; sizes[1].size = area_size - start_border - end_border; sizes[2].offset = offset + area_size - end_border; sizes[2].size = end_border; } static void gtk_border_image_render_slice (cairo_t *cr, cairo_surface_t *slice, double slice_width, double slice_height, double x, double y, double width, double height, GtkCssBorderRepeatStyle hrepeat, GtkCssBorderRepeatStyle vrepeat) { double hscale, vscale; double xstep, ystep; cairo_extend_t extend = CAIRO_EXTEND_PAD; cairo_matrix_t matrix; cairo_pattern_t *pattern; /* We can't draw center tiles yet */ g_assert (hrepeat == GTK_CSS_REPEAT_STYLE_STRETCH || vrepeat == GTK_CSS_REPEAT_STYLE_STRETCH); hscale = width / slice_width; vscale = height / slice_height; xstep = width; ystep = height; switch (hrepeat) { case GTK_CSS_REPEAT_STYLE_REPEAT: extend = CAIRO_EXTEND_REPEAT; hscale = vscale; break; case GTK_CSS_REPEAT_STYLE_SPACE: { double space, n; extend = CAIRO_EXTEND_NONE; hscale = vscale; xstep = hscale * slice_width; n = floor (width / xstep); space = (width - n * xstep) / (n + 1); xstep += space; x += space; width -= 2 * space; } break; case GTK_CSS_REPEAT_STYLE_STRETCH: break; case GTK_CSS_REPEAT_STYLE_ROUND: extend = CAIRO_EXTEND_REPEAT; hscale = width / (slice_width * MAX (round (width / (slice_width * vscale)), 1)); break; default: g_assert_not_reached (); break; } switch (vrepeat) { case GTK_CSS_REPEAT_STYLE_REPEAT: extend = CAIRO_EXTEND_REPEAT; vscale = hscale; break; case GTK_CSS_REPEAT_STYLE_SPACE: { double space, n; extend = CAIRO_EXTEND_NONE; vscale = hscale; ystep = vscale * slice_height; n = floor (height / ystep); space = (height - n * ystep) / (n + 1); ystep += space; y += space; height -= 2 * space; } break; case GTK_CSS_REPEAT_STYLE_STRETCH: break; case GTK_CSS_REPEAT_STYLE_ROUND: extend = CAIRO_EXTEND_REPEAT; vscale = height / (slice_height * MAX (round (height / (slice_height * hscale)), 1)); break; default: g_assert_not_reached (); break; } pattern = cairo_pattern_create_for_surface (slice); cairo_matrix_init_translate (&matrix, hrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? slice_width / 2 : 0, vrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? slice_height / 2 : 0); cairo_matrix_scale (&matrix, 1 / hscale, 1 / vscale); cairo_matrix_translate (&matrix, hrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? - width / 2 : 0, vrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? - height / 2 : 0); cairo_pattern_set_matrix (pattern, &matrix); cairo_pattern_set_extend (pattern, extend); cairo_save (cr); cairo_translate (cr, x, y); for (y = 0; y < height; y += ystep) { for (x = 0; x < width; x += xstep) { cairo_save (cr); cairo_translate (cr, x, y); cairo_set_source (cr, pattern); cairo_rectangle (cr, 0, 0, xstep, ystep); cairo_fill (cr); cairo_restore (cr); } } cairo_restore (cr); cairo_pattern_destroy (pattern); } static void gtk_border_image_compute_slice_size (GtkBorderImageSliceSize sizes[3], int surface_size, int start_size, int end_size) { sizes[0].size = MIN (start_size, surface_size); sizes[0].offset = 0; sizes[2].size = MIN (end_size, surface_size); sizes[2].offset = surface_size - sizes[2].size; sizes[1].size = MAX (0, surface_size - sizes[0].size - sizes[2].size); sizes[1].offset = sizes[0].size; } void _gtk_border_image_render (GtkBorderImage *image, GtkBorder *border_width, cairo_t *cr, gdouble x, gdouble y, gdouble width, gdouble height) { cairo_surface_t *surface, *slice; GtkBorderImageSliceSize vertical_slice[3], horizontal_slice[3]; GtkBorderImageSliceSize vertical_border[3], horizontal_border[3]; double source_width, source_height; int h, v; if (image->has_width) border_width = &image->width; _gtk_css_image_get_concrete_size (image->source, 0, 0, width, height, &source_width, &source_height); /* XXX: Optimize for (source_width == width && source_height == height) */ surface = _gtk_css_image_get_surface (image->source, cairo_get_target (cr), source_width, source_height); gtk_border_image_compute_slice_size (horizontal_slice, source_width, image->slice.left, image->slice.right); gtk_border_image_compute_slice_size (vertical_slice, source_height, image->slice.top, image->slice.bottom); gtk_border_image_compute_border_size (horizontal_border, x, width, border_width->left, border_width->right); gtk_border_image_compute_border_size (vertical_border, y, height, border_width->top, border_width->bottom); for (v = 0; v < 3; v++) { if (vertical_slice[v].size == 0 || vertical_border[v].size == 0) continue; for (h = 0; h < 3; h++) { if (horizontal_slice[h].size == 0 || horizontal_border[h].size == 0) continue; if (h == 1 && v == 1) continue; slice = cairo_surface_create_for_rectangle (surface, horizontal_slice[h].offset, vertical_slice[v].offset, horizontal_slice[h].size, vertical_slice[v].size); gtk_border_image_render_slice (cr, slice, horizontal_slice[h].size, vertical_slice[v].size, horizontal_border[h].offset, vertical_border[v].offset, horizontal_border[h].size, vertical_border[v].size, h == 1 ? image->repeat.hrepeat : GTK_CSS_REPEAT_STYLE_STRETCH, v == 1 ? image->repeat.vrepeat : GTK_CSS_REPEAT_STYLE_STRETCH); cairo_surface_destroy (slice); } } cairo_surface_destroy (surface); }