/* * draw.c - draw functions * * Copyright © 2007-2008 Julien Danjou * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * */ /* asprintf */ #define _GNU_SOURCE #include #include "config.h" #ifdef WITH_IMLIB2 #include #else #include #include #endif #include #include #include #include #include #include #include #include #include "common/tokenize.h" #include "common/draw.h" #include "common/markup.h" #include "common/xutil.h" /** Convert text from any charset to UTF-8 using iconv * \param iso the ISO string to convert * \return NULL if error, otherwise pointer to the new converted string */ char * draw_iso2utf8(const char *iso) { iconv_t iso2utf8; size_t len, utf8len; char *utf8, *utf8p; if(!(len = a_strlen(iso))) return NULL; if(!a_strcmp(nl_langinfo(CODESET), "UTF-8")) return NULL; iso2utf8 = iconv_open("UTF-8", nl_langinfo(CODESET)); if(iso2utf8 == (iconv_t) -1) { if(errno == EINVAL) warn("unable to convert text from %s to UTF-8, not available", nl_langinfo(CODESET)); else warn("unable to convert text: %s", strerror(errno)); return NULL; } utf8len = 2 * len + 1; utf8 = utf8p = p_new(char, utf8len); if(iconv(iso2utf8, (char **) &iso, &len, &utf8, &utf8len) == (size_t) -1) { warn("text conversion failed: %s", strerror(errno)); p_delete(&utf8p); } if(iconv_close(iso2utf8)) warn("error closing iconv"); return utf8p; } static xcb_visualtype_t * draw_screen_default_visual(xcb_screen_t *s) { xcb_depth_iterator_t depth_iter; xcb_visualtype_iterator_t visual_iter; if(!s) return NULL; for(depth_iter = xcb_screen_allowed_depths_iterator(s); depth_iter.rem; xcb_depth_next (&depth_iter)) for(visual_iter = xcb_depth_visuals_iterator (depth_iter.data); visual_iter.rem; xcb_visualtype_next (&visual_iter)) if (s->root_visual == visual_iter.data->visual_id) return visual_iter.data; return NULL; } /** Create a new draw context. * \param conn Connection ref. * \param phys_screen Physical screen id. * \param width Width. * \param height Height. * \param px Pixmap object to store. * \param fg Foreground color. * \param bg Background color. * \return A draw context pointer. */ draw_context_t * draw_context_new(xcb_connection_t *conn, int phys_screen, int width, int height, xcb_pixmap_t px, xcolor_t fg, xcolor_t bg) { draw_context_t *d = p_new(draw_context_t, 1); xcb_screen_t *s = xutil_screen_get(conn, phys_screen); d->connection = conn; d->phys_screen = phys_screen; d->width = width; d->height = height; d->depth = s->root_depth; d->visual = draw_screen_default_visual(s); d->pixmap = px; d->surface = cairo_xcb_surface_create(conn, px, d->visual, width, height); d->cr = cairo_create(d->surface); d->layout = pango_cairo_create_layout(d->cr); d->fg = fg; d->bg = bg; return d; }; /** Create a new Pango font * \param conn Connection ref * \param phys_screen The physical screen number. * \param fontname Pango fontname (e.g. [FAMILY-LIST] [STYLE-OPTIONS] [SIZE]) * \return a new font */ font_t * draw_font_new(xcb_connection_t *conn, int phys_screen, const char *fontname) { cairo_surface_t *surface; xcb_screen_t *s = xutil_screen_get(conn, phys_screen); cairo_t *cr; PangoLayout *layout; font_t *font = p_new(font_t, 1); /* Create a dummy cairo surface, cairo context and pango layout in * order to get font informations */ surface = cairo_xcb_surface_create(conn, phys_screen, draw_screen_default_visual(s), s->width_in_pixels, s->height_in_pixels); cr = cairo_create(surface); layout = pango_cairo_create_layout(cr); /* Get the font description used to set text on a PangoLayout */ font->desc = pango_font_description_from_string(fontname); pango_layout_set_font_description(layout, font->desc); /* Get height */ pango_layout_get_pixel_size(layout, NULL, &font->height); g_object_unref(layout); cairo_destroy(cr); cairo_surface_destroy(surface); return font; } /** Delete a font. * \param font Font to delete. */ void draw_font_delete(font_t **font) { if(*font) { pango_font_description_free((*font)->desc); p_delete(font); } } typedef struct { xcb_connection_t *connection; int phys_screen; buffer_t text; alignment_t align; struct { int left, right; } margin; bool has_bg_color; xcolor_t bg_color; draw_image_t *bg_image; struct { int offset; xcolor_t color; } shadow; } draw_parser_data_t; static void draw_markup_on_event(markup_parser_data_t *p, const char *elem, const char **names, const char **values) { draw_parser_data_t *data = p->priv; /* hack: markup.c validates tags so we can avoid strcmps here */ switch (*elem) { case 'b': /* bg */ for (; *names; names++, values++) { if(!a_strcmp(*names, "color")) data->has_bg_color = xcolor_new(data->connection, data->phys_screen, *values, &data->bg_color); else if(!a_strcmp(*names, "image")) data->bg_image = draw_image_new(*values); } break; case 't': /* text */ for (; *names; names++, values++) { if(!a_strcmp(*names, "align")) data->align = draw_align_get_from_str(*values); else if(!a_strcmp(*names, "shadow")) xcolor_new(data->connection, data->phys_screen, *values, &data->shadow.color); else if(!a_strcmp(*names, "shadow_offset")) data->shadow.offset = atoi(*values); } break; case 'm': /* margin */ for (; *names; names++, values++) { if(!a_strcmp(*names, "left")) data->margin.left = atoi(*values); else if(!a_strcmp(*names, "right")) data->margin.right = atoi(*values); } break; } } static bool draw_text_markup_expand(draw_parser_data_t *data, const char *str, ssize_t slen) { static char const * const elements[] = { "bg", "text", "margin", NULL }; markup_parser_data_t p = { .elements = elements, .priv = data, .on_element = &draw_markup_on_event, }; markup_parser_data_init(&p); if(!markup_parse(&p, str, slen)) { markup_parser_data_wipe(&p); return false; } /* stole text */ data->text = p.text; buffer_init(&p.text); markup_parser_data_wipe(&p); return true; } /** Draw text into a draw context. * \param ctx Draw context to draw to. * \param font The font to use. * \param area Area to draw to. * \param text Text to draw. */ void draw_text(draw_context_t *ctx, font_t *font, area_t area, const char *text) { int x, y; ssize_t len, olen; PangoRectangle ext; draw_parser_data_t parser_data; if(!(len = a_strlen(text))) return; p_clear(&parser_data, 1); parser_data.connection = ctx->connection; parser_data.phys_screen = ctx->phys_screen; if(draw_text_markup_expand(&parser_data, text, len)) { text = parser_data.text.s; len = parser_data.text.len; } olen = len; if(parser_data.has_bg_color) draw_rectangle(ctx, area, 1.0, true, parser_data.bg_color); if(parser_data.bg_image) { draw_image(ctx, area.x, area.y, 0, parser_data.bg_image); draw_image_delete(&parser_data.bg_image); } pango_layout_set_width(ctx->layout, pango_units_from_double(area.width - (parser_data.margin.left + parser_data.margin.right))); pango_layout_set_ellipsize(ctx->layout, PANGO_ELLIPSIZE_END); pango_layout_set_markup(ctx->layout, text, len); pango_layout_set_font_description(ctx->layout, font->desc); pango_layout_get_pixel_extents(ctx->layout, NULL, &ext); x = area.x + parser_data.margin.left; /* + 1 is added for rounding, so that in any case of doubt we rather draw * the text 1px lower than too high which usually results in a better type * face */ y = area.y + (ctx->height - font->height + 1) / 2; switch(parser_data.align) { case AlignCenter: x += (area.width - ext.width) / 2; break; case AlignRight: x += area.width - ext.width; break; default: break; } if(parser_data.shadow.offset) { cairo_set_source_rgba(ctx->cr, parser_data.shadow.color.red / 65535.0, parser_data.shadow.color.green / 65535.0, parser_data.shadow.color.blue / 65535.0, parser_data.shadow.color.alpha / 65535.0); cairo_move_to(ctx->cr, x + parser_data.shadow.offset, y + parser_data.shadow.offset); pango_cairo_update_layout(ctx->cr, ctx->layout); pango_cairo_show_layout(ctx->cr, ctx->layout); } cairo_move_to(ctx->cr, x, y); cairo_set_source_rgba(ctx->cr, ctx->fg.red / 65535.0, ctx->fg.green / 65535.0, ctx->fg.blue / 65535.0, ctx->fg.alpha / 65535.0); pango_cairo_update_layout(ctx->cr, ctx->layout); pango_cairo_show_layout(ctx->cr, ctx->layout); buffer_wipe(&parser_data.text); } /** Setup color-source for cairo (gradient or mono). * \param ctx Draw context. * \param rect x, y to x + x_offset, y + y_offset. * \param pcolor Color to use at start (x, y). * \param pcolor_center Color at 50% of width. * \param pcolor_end Color at pattern end (x + x_offset, y + y_offset). * \return pat Pattern or NULL, needs to get cairo_pattern_destroy()'ed. */ static cairo_pattern_t * draw_setup_cairo_color_source(draw_context_t *ctx, area_t rect, xcolor_t *pcolor, xcolor_t *pcolor_center, xcolor_t *pcolor_end) { cairo_pattern_t *pat = NULL; /* no need for a real pattern: */ if(!pcolor_end && !pcolor_center) cairo_set_source_rgba(ctx->cr, pcolor->red / 65535.0, pcolor->green / 65535.0, pcolor->blue / 65535.0, pcolor->alpha / 65535.0); else { pat = cairo_pattern_create_linear(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height); /* pcolor is always set (so far in awesome) */ cairo_pattern_add_color_stop_rgba(pat, 0.0, pcolor->red / 65535.0, pcolor->green / 65535.0, pcolor->blue / 65535.0, pcolor->alpha / 65535.0); if(pcolor_center) cairo_pattern_add_color_stop_rgba(pat, 0.5, pcolor_center->red / 65535.0, pcolor_center->green / 65535.0, pcolor_center->blue / 65535.0, pcolor_center->alpha / 65535.0); if(pcolor_end) cairo_pattern_add_color_stop_rgba(pat, 1.0, pcolor_end->red / 65535.0, pcolor_end->green / 65535.0, pcolor_end->blue / 65535.0, pcolor_end->alpha / 65535.0); else cairo_pattern_add_color_stop_rgba(pat, 1.0, pcolor->red / 65535.0, pcolor->green / 65535.0, pcolor->blue / 65535.0, pcolor->alpha / 65535.0); cairo_set_source(ctx->cr, pat); } return pat; } /** Draw rectangle inside the coordinates * \param ctx Draw context * \param geometry geometry * \param line_width line width * \param filled fill rectangle? * \param color color to use */ void draw_rectangle(draw_context_t *ctx, area_t geometry, float line_width, bool filled, xcolor_t color) { cairo_set_antialias(ctx->cr, CAIRO_ANTIALIAS_NONE); cairo_set_line_width(ctx->cr, line_width); cairo_set_miter_limit(ctx->cr, 10.0); cairo_set_line_join(ctx->cr, CAIRO_LINE_JOIN_MITER); cairo_set_source_rgba(ctx->cr, color.red / 65535.0, color.green / 65535.0, color.blue / 65535.0, color.alpha / 65535.0); if(filled) { cairo_rectangle(ctx->cr, geometry.x, geometry.y, geometry.width, geometry.height); cairo_fill(ctx->cr); } else { cairo_rectangle(ctx->cr, geometry.x + line_width / 2.0, geometry.y + line_width / 2.0, geometry.width - line_width, geometry.height - line_width); cairo_stroke(ctx->cr); } } /** Draw rectangle with gradient colors * \param ctx Draw context * \param geometry geometry * \param line_width line width * \param filled filled rectangle? * \param pattern_rect pattern geometry * \param pcolor color to use at start * \param pcolor_center color at 50% of width * \param pcolor_end color at pattern_start + pattern_width */ void draw_rectangle_gradient(draw_context_t *ctx, area_t geometry, float line_width, bool filled, area_t pattern_rect, xcolor_t *pcolor, xcolor_t *pcolor_center, xcolor_t *pcolor_end) { cairo_pattern_t *pat; cairo_set_antialias(ctx->cr, CAIRO_ANTIALIAS_NONE); cairo_set_line_width(ctx->cr, line_width); cairo_set_miter_limit(ctx->cr, 10.0); cairo_set_line_join(ctx->cr, CAIRO_LINE_JOIN_MITER); pat = draw_setup_cairo_color_source(ctx, pattern_rect, pcolor, pcolor_center, pcolor_end); if(filled) { cairo_rectangle(ctx->cr, geometry.x, geometry.y, geometry.width, geometry.height); cairo_fill(ctx->cr); } else { cairo_rectangle(ctx->cr, geometry.x + 1, geometry.y, geometry.width - 1, geometry.height - 1); cairo_stroke(ctx->cr); } if(pat) cairo_pattern_destroy(pat); } /** Setup some cairo-things for drawing a graph * \param ctx Draw context */ void draw_graph_setup(draw_context_t *ctx) { cairo_set_antialias(ctx->cr, CAIRO_ANTIALIAS_NONE); cairo_set_line_width(ctx->cr, 1.0); /* without it, it can draw over the path on sharp angles * ...too long lines * (...graph_line) */ cairo_set_miter_limit(ctx->cr, 0.0); cairo_set_line_join(ctx->cr, CAIRO_LINE_JOIN_MITER); } /** Draw a graph. * \param ctx Draw context. * \param rect The area to draw into. * \param from Array of starting-point offsets to draw a graph lines. * \param to Array of end-point offsets to draw a graph lines. * \param cur_index Current position in data-array (cycles around). * \param grow Put new values to the left or to the right. * \param patt_rect Pattern geometry. * \param pcolor Color at the left. * \param pcolor_center Color in the center. * \param pcolor_end Color at the right. */ void draw_graph(draw_context_t *ctx, area_t rect, int *from, int *to, int cur_index, position_t grow, area_t patt_rect, xcolor_t *pcolor, xcolor_t *pcolor_center, xcolor_t *pcolor_end) { int i = -1; float x = rect.x + 0.5; /* middle of a pixel */ cairo_pattern_t *pat; pat = draw_setup_cairo_color_source(ctx, patt_rect, pcolor, pcolor_center, pcolor_end); if(grow == Right) /* draw from right to left */ { x += rect.width - 1; while(++i < rect.width) { cairo_move_to(ctx->cr, x, rect.y - from[cur_index]); cairo_line_to(ctx->cr, x, rect.y - to[cur_index]); x -= 1.0; if (--cur_index < 0) cur_index = rect.width - 1; } } else /* draw from left to right */ while(++i < rect.width) { cairo_move_to(ctx->cr, x, rect.y - from[cur_index]); cairo_line_to(ctx->cr, x, rect.y - to[cur_index]); x += 1.0; if (--cur_index < 0) cur_index = rect.width - 1; } cairo_stroke(ctx->cr); if(pat) cairo_pattern_destroy(pat); } /** Draw a line into a graph-widget * \param ctx Draw context * \param rect The area to draw into. * \param to array of offsets to draw the line through... * \param cur_index current position in data-array (cycles around) * \param grow put new values to the left or to the right * \param patt_rect Pattern geometry. * \param pcolor color at the left * \param pcolor_center color in the center * \param pcolor_end color at the right */ void draw_graph_line(draw_context_t *ctx, area_t rect, int *to, int cur_index, position_t grow, area_t patt_rect, xcolor_t *pcolor, xcolor_t *pcolor_center, xcolor_t *pcolor_end) { int i, w; float x, y; cairo_pattern_t *pat; /* NOTE: without, it sometimes won't draw to some path (centered in a pixel) * ... it won't fill some pixels! It also looks much nicer so. * (since line-drawing is the last on the graph, no need to reset to _NONE) */ /* Not much difference to CAIRO_ANTIALIAS_DEFAULT, but recommend for LCD */ cairo_set_antialias(ctx->cr, CAIRO_ANTIALIAS_SUBPIXEL); /* a nicer, better visible line compared to 1.0 */ cairo_set_line_width(ctx->cr, 1.25); pat = draw_setup_cairo_color_source(ctx, patt_rect, pcolor, pcolor_center, pcolor_end); /* path through the centers of pixels */ x = rect.x + 0.5; y = rect.y + 0.5; w = rect.width; if(grow == Right) { /* go through the values from old to new. Begin with the oldest. */ if(++cur_index > w - 1) cur_index = 0; cairo_move_to(ctx->cr, x, y - to[cur_index]); } else /* on the left border: fills a pixel also when there's only one value */ cairo_move_to(ctx->cr, x - 1.0, y - to[cur_index]); for(i = 0; i < w; i++) { cairo_line_to(ctx->cr, x, y - to[cur_index]); x += 1.0; /* cycles around the index */ if(grow == Right) { if (++cur_index > w - 1) cur_index = 0; } else { if(--cur_index < 0) cur_index = w - 1; } } /* onto the right border: fills a pixel also when there's only one value */ if(grow == Right) cairo_line_to(ctx->cr, x, y - to[cur_index]); cairo_stroke(ctx->cr); if(pat) cairo_pattern_destroy(pat); /* reset line-width */ cairo_set_line_width(ctx->cr, 1.0); } /** Draw a circle * \param ctx Draw context to draw to * \param x x coordinate * \param y y coordinate * \param r size of the circle * \param filled fill circle? * \param color color to use */ void draw_circle(draw_context_t *ctx, int x, int y, int r, bool filled, xcolor_t color) { cairo_set_line_width(ctx->cr, 1.0); cairo_set_source_rgba(ctx->cr, color.red / 65535.0, color.green / 65535.0, color.blue / 65535.0, color.alpha / 65535.0); cairo_new_sub_path(ctx->cr); /* don't draw from the old reference point to.. */ if(filled) { cairo_arc (ctx->cr, x + r, y + r, r, 0, 2 * M_PI); cairo_fill(ctx->cr); } else cairo_arc (ctx->cr, x + r, y + r, r - 1, 0, 2 * M_PI); cairo_stroke(ctx->cr); } /** Draw an image from ARGB data to a draw context. * Data should be stored as an array of alpha, red, blue, green for each pixel * and the array size should be w * h elements long. * \param ctx Draw context to draw to * \param x x coordinate * \param y y coordinate * \param w width * \param h height * \param wanted_h wanted height: if > 0, image will be resized * \param data the image pixels array */ void draw_image_from_argb_data(draw_context_t *ctx, int x, int y, int w, int h, int wanted_h, unsigned char *data) { double ratio; cairo_t *cr; cairo_surface_t *source; source = cairo_image_surface_create_for_data(data, CAIRO_FORMAT_ARGB32, w, h, #if CAIRO_VERSION_MAJOR < 1 || (CAIRO_VERSION_MAJOR == 1 && CAIRO_VERSION_MINOR < 5) || (CAIRO_VERSION_MAJOR == 1 && CAIRO_VERSION_MINOR == 5 && CAIRO_VERSION_MICRO < 8) sizeof(unsigned char) * 4 * w); #else cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, w)); #endif cr = cairo_create(ctx->surface); if(wanted_h > 0 && h > 0) { ratio = (double) wanted_h / (double) h; cairo_scale(cr, ratio, ratio); cairo_set_source_surface(cr, source, x / ratio, y / ratio); } else cairo_set_source_surface(cr, source, x, y); cairo_paint(cr); cairo_destroy(cr); cairo_surface_destroy(source); } #ifndef WITH_IMLIB2 /** Load an image from filename. * \param filename The image file to load. * \return A new image. */ draw_image_t * draw_image_new(const char *filename) { draw_image_t *image = NULL; GdkPixbuf *pixbuf; GError *error = NULL; if(filename) { if(!(pixbuf = gdk_pixbuf_new_from_file(filename,&error))) warn("cannot load image %s: %s", filename, error->message); else { image = p_new(draw_image_t, 1); image->data = pixbuf; image->width = gdk_pixbuf_get_width(pixbuf); image->height = gdk_pixbuf_get_height(pixbuf); } } return image; } /** Delete an image. * \param image The image to delete. */ void draw_image_delete(draw_image_t **image) { if(*image) { gdk_pixbuf_unref((*image)->data); p_delete(image); } } /** Draw an image to a draw context. * \param ctx Draw context to draw to. * \param x x coordinate. * \param y y coordinate. * \param wanted_h Wanted height: if > 0, image will be resized. * \param image The image to draw. */ void draw_image(draw_context_t *ctx, int x, int y, int wanted_h, draw_image_t *image) { cairo_t *cr; cr = cairo_create(ctx->surface); if(wanted_h > 0 && image->height > 0) { double ratio = (double) wanted_h / (double) image->height; cairo_scale(cr, ratio, ratio); gdk_cairo_set_source_pixbuf(cr, image->data, x / ratio, y / ratio); } else gdk_cairo_set_source_pixbuf(cr, image->data, x, y); cairo_paint(cr); cairo_destroy(cr); } #else /* WITH_IMLIB2 */ static const char * draw_imlib_load_strerror(Imlib_Load_Error e) { switch(e) { case IMLIB_LOAD_ERROR_FILE_DOES_NOT_EXIST: return "no such file or directory"; case IMLIB_LOAD_ERROR_FILE_IS_DIRECTORY: return "file is a directory"; case IMLIB_LOAD_ERROR_PERMISSION_DENIED_TO_READ: return "read permission denied"; case IMLIB_LOAD_ERROR_NO_LOADER_FOR_FILE_FORMAT: return "no loader for file format"; case IMLIB_LOAD_ERROR_PATH_TOO_LONG: return "path too long"; case IMLIB_LOAD_ERROR_PATH_COMPONENT_NON_EXISTANT: return "path component non existant"; case IMLIB_LOAD_ERROR_PATH_COMPONENT_NOT_DIRECTORY: return "path compoment not a directory"; case IMLIB_LOAD_ERROR_PATH_POINTS_OUTSIDE_ADDRESS_SPACE: return "path points oustide address space"; case IMLIB_LOAD_ERROR_TOO_MANY_SYMBOLIC_LINKS: return "too many symbolic links"; case IMLIB_LOAD_ERROR_OUT_OF_MEMORY: return "out of memory"; case IMLIB_LOAD_ERROR_OUT_OF_FILE_DESCRIPTORS: return "out of file descriptors"; case IMLIB_LOAD_ERROR_PERMISSION_DENIED_TO_WRITE: return "write permission denied"; case IMLIB_LOAD_ERROR_OUT_OF_DISK_SPACE: return "out of disk space"; case IMLIB_LOAD_ERROR_UNKNOWN: return "unknown error, that's really bad"; case IMLIB_LOAD_ERROR_NONE: return "no error, oops"; } return "unknown error"; } /** Load an image from filename. * \param filename The image file to load. * \return A new image. */ draw_image_t * draw_image_new(const char *filename) { int w, h, size, i; DATA32 *data; double alpha; unsigned char *dataimg, *rdataimg; Imlib_Image imimage; Imlib_Load_Error e = IMLIB_LOAD_ERROR_NONE; draw_image_t *image; if(!filename) return NULL; if(!(imimage = imlib_load_image_with_error_return(filename, &e))) { warn("cannot load image %s: %s", filename, draw_imlib_load_strerror(e)); return NULL; } imlib_context_set_image(imimage); w = imlib_image_get_width(); h = imlib_image_get_height(); size = w * h; data = imlib_image_get_data_for_reading_only(); rdataimg = dataimg = p_new(unsigned char, size * 4); for(i = 0; i < size; i++, dataimg += 4) { dataimg[3] = (data[i] >> 24) & 0xff; /* A */ /* cairo wants pre-multiplied alpha */ alpha = dataimg[3] / 255.0; dataimg[2] = ((data[i] >> 16) & 0xff) * alpha; /* R */ dataimg[1] = ((data[i] >> 8) & 0xff) * alpha; /* G */ dataimg[0] = (data[i] & 0xff) * alpha; /* B */ } image = p_new(draw_image_t, 1); image->data = rdataimg; image->width = w; image->height = h; imlib_free_image(); return image; } /** Delete an image * \param image the image to delete */ void draw_image_delete(draw_image_t **image) { if (*image) { p_delete(&(*image)->data); p_delete(image); } } /** Draw an image to a draw context * \param ctx Draw context to draw to * \param x x coordinate * \param y y coordinate * \param wanted_h wanted height: if > 0, image will be resized * \param image the image to draw */ void draw_image(draw_context_t *ctx, int x, int y, int wanted_h, draw_image_t *image) { draw_image_from_argb_data(ctx, x, y, image->width, image->height, wanted_h, image->data); } /** Get an image size * \param filename file name * \return area_t structure with width and height set to image size */ area_t draw_get_image_size(const char *filename) { area_t size = { 0, 0, 0, 0 }; Imlib_Image image; Imlib_Load_Error e = IMLIB_LOAD_ERROR_NONE; if((image = imlib_load_image_with_error_return(filename, &e))) { imlib_context_set_image(image); size.width = imlib_image_get_width(); size.height = imlib_image_get_height(); imlib_free_image(); } else warn("cannot load image %s: %s", filename, draw_imlib_load_strerror(e)); return size; } #endif /* WITH_IMLIB2 */ /** Rotate a pixmap. * \param ctx Draw context to draw with. * \param src Drawable to draw from. * \param dest Drawable to draw to. * \param src_w Drawable width. * \param src_h Drawable height. * \param dest_w Drawable width. * \param dest_h Drawable height. * \param angle angle to rotate. * \param tx Translate to this x coordinate. * \param ty Translate to this y coordinate. */ void draw_rotate(draw_context_t *ctx, xcb_pixmap_t src, xcb_pixmap_t dest, int src_w, int src_h, int dest_w, int dest_h, double angle, int tx, int ty) { cairo_surface_t *surface, *source; cairo_t *cr; surface = cairo_xcb_surface_create(ctx->connection, dest, ctx->visual, dest_w, dest_h); source = cairo_xcb_surface_create(ctx->connection, src, ctx->visual, src_w, src_h); cr = cairo_create (surface); cairo_translate(cr, tx, ty); cairo_rotate(cr, angle); cairo_set_source_surface(cr, source, 0.0, 0.0); cairo_paint(cr); cairo_destroy(cr); cairo_surface_destroy(source); cairo_surface_destroy(surface); } /** Return the width and height of a text in pixel. * \param conn Connection ref. * \param phys_screen Physical screen number. * \param font Font to use. * \param text The text. * \return Text height and width. */ area_t draw_text_extents(xcb_connection_t *conn, int phys_screen, font_t *font, const char *text) { cairo_surface_t *surface; cairo_t *cr; PangoLayout *layout; PangoRectangle ext; xcb_screen_t *s = xutil_screen_get(conn, phys_screen); area_t geom = { 0, 0, 0, 0 }; ssize_t len; draw_parser_data_t parser_data; if(!(len = a_strlen(text))) return geom; p_clear(&parser_data, 1); parser_data.connection = conn; parser_data.phys_screen = phys_screen; if(draw_text_markup_expand(&parser_data, text, len)) { text = parser_data.text.s; len = parser_data.text.len; } surface = cairo_xcb_surface_create(conn, phys_screen, draw_screen_default_visual(s), s->width_in_pixels, s->height_in_pixels); cr = cairo_create(surface); layout = pango_cairo_create_layout(cr); pango_layout_set_markup(layout, text, len); pango_layout_set_font_description(layout, font->desc); pango_layout_get_pixel_extents(layout, NULL, &ext); g_object_unref(layout); cairo_destroy(cr); cairo_surface_destroy(surface); geom.width = ext.width; geom.height = ext.height * 1.5; buffer_wipe(&parser_data.text); return geom; } /** Transform a string to a alignment_t type. * Recognized string are left, center or right. Everything else will be * recognized as AlignAuto. * \param align string with align text * \return alignment_t type */ alignment_t draw_align_get_from_str(const char *align) { switch (a_tokenize(align, -1)) { case A_TK_LEFT: return AlignLeft; case A_TK_CENTER: return AlignCenter; case A_TK_RIGHT: return AlignRight; case A_TK_FLEX: return AlignFlex; default: return AlignAuto; } } #define RGB_COLOR_8_TO_16(i) (65535 * ((i) & 0xff) / 255) /** Initialize an X color * \param conn Connection ref * \param phys_screen Physical screen number * \param colstr Color specification * \param color xcolor_t struct to store color to * \return true if color allocation was successfull */ bool xcolor_new(xcb_connection_t *conn, int phys_screen, const char *colstr, xcolor_t *color) { xcb_screen_t *s = xutil_screen_get(conn, phys_screen); xcb_alloc_color_reply_t *hexa_color = NULL; xcb_alloc_named_color_reply_t *named_color = NULL; unsigned long colnum; uint16_t red, green, blue; ssize_t len; char *buf; if(!(len = a_strlen(colstr))) return false; /* The color is given in RGB value */ if(colstr[0] == '#') { errno = 0; if(len == 7) { colnum = strtoul(&colstr[1], NULL, 16); color->alpha = 0xffff; } /* we have alpha */ else if(len == 9) { buf = a_strndup(colstr + 1, 6); colnum = strtoul(buf, NULL, 16); p_delete(&buf); color->alpha = RGB_COLOR_8_TO_16(strtoul(&colstr[7], NULL, 16)); if(errno != 0) { warn("awesome: error, invalid color '%s'", colstr); return false; } } else { warn("awesome: error, invalid color '%s'", colstr); return false; } if(errno != 0) { warn("awesome: error, invalid color '%s'", colstr); return false; } red = RGB_COLOR_8_TO_16(colnum >> 16); green = RGB_COLOR_8_TO_16(colnum >> 8); blue = RGB_COLOR_8_TO_16(colnum); hexa_color = xcb_alloc_color_reply(conn, xcb_alloc_color_unchecked(conn, s->default_colormap, red, green, blue), NULL); if(hexa_color) { color->pixel = hexa_color->pixel; color->red = hexa_color->red; color->green = hexa_color->green; color->blue = hexa_color->blue; p_delete(&hexa_color); return true; } } else { named_color = xcb_alloc_named_color_reply(conn, xcb_alloc_named_color_unchecked(conn, s->default_colormap, len, colstr), NULL); if(named_color) { color->pixel = named_color->pixel; color->red = named_color->visual_red; color->green = named_color->visual_green; color->blue = named_color->visual_blue; color->alpha = 0xffff; p_delete(&named_color); return true; } } warn("awesome: error, cannot allocate color '%s'", colstr); return false; } /** Remove a area from a list of them, * spliting the space between several area that can overlap * \param areas array of areas. * \param elem area to remove */ void area_array_remove(area_array_t *areas, area_t elem) { /* loop from the end because: * (1) we remove elements ; * (2) the one we add to the end are okay wrt the invariants */ for (int i = areas->len - 1; i >= 0; i--) { if(area_intersect_area(areas->tab[i], elem)) { /* remove it from the list */ area_t r = area_array_take(areas, i); area_t inter = area_get_intersect_area(r, elem); if(AREA_LEFT(inter) > AREA_LEFT(r)) { area_t extra = { .x = r.x, .y = r.y, .width = AREA_LEFT(inter) - r.x, .height = r.height, }; area_array_append(areas, extra); } if(AREA_TOP(inter) > AREA_TOP(r)) { area_t extra = { .x = r.x, .y = r.y, .width = r.width, .height = AREA_TOP(inter) - r.y, }; area_array_append(areas, extra); } if(AREA_RIGHT(inter) < AREA_RIGHT(r)) { area_t extra = { .x = AREA_RIGHT(inter), .y = r.y, .width = AREA_RIGHT(r) - AREA_RIGHT(inter), .height = r.height, }; area_array_append(areas, extra); } if(AREA_BOTTOM(inter) < AREA_BOTTOM(r)) { area_t extra = { .x = r.x, .y = AREA_BOTTOM(inter), .width = r.width, .height = AREA_BOTTOM(r) - AREA_BOTTOM(inter), }; area_array_append(areas, extra); } } } } // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80