refactor so that it creates a pixmap big enough to display everything.
2003-01-13 James Henstridge <james@daa.com.au>
* src/font-view.c (create_text_pixmap): refactor so that it
creates a pixmap big enough to display everything.
(main): make the window resizable, and add font preview to a
scrolled window.
This commit is contained in:
James Henstridge
James Henstridge
parent
6037291028
commit
b8932bf738
2 changed files with 116 additions and 66 deletions
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@ -49,111 +49,151 @@ FT_Error FT_New_Face_From_URI(FT_Library library,
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FT_Long face_index,
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FT_Face *aface);
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/* height is a little more than needed to display all sizes */
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#define FONTAREA_WIDTH 500
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#define FONTAREA_HEIGHT 262
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static const gchar lowercase_text[] = "abcdefghijklmnopqrstuvwxyz";
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static const gchar uppercase_text[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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static const gchar punctuation_text[] = "0123456789.:,;(*!?')";
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static void
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draw_text(Display *xdisplay, XftDraw *draw, FT_Face face, gint pixel_size,
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XftColor *colour, const gchar *text, gint textlen, gint *pos_y)
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static inline XftFont *
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get_font(Display *xdisplay, FT_Face face, gint size)
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{
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FcPattern *pattern;
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XftFont *font;
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pattern = FcPatternBuild(NULL,
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FC_FT_FACE, FcTypeFTFace, face,
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FC_PIXEL_SIZE, FcTypeDouble, (double)pixel_size,
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FC_PIXEL_SIZE, FcTypeDouble, (double)size,
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NULL);
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font = XftFontOpenPattern(xdisplay, pattern);
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FcPatternDestroy(pattern);
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if (!font) {
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g_printerr("could not load Xft face\n");
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goto end;
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}
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// g_message("target size=%d, ascent=%d, descent=%d, height=%d",
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// pixel_size, font->ascent, font->descent, font->height);
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return font;
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}
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XftDrawString8(draw, colour, font, 5, *pos_y + font->ascent,
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(gchar *)text, textlen);
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XftFontClose(xdisplay, font);
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end:
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*pos_y += pixel_size;
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static inline void
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draw_string(Display *xdisplay, XftDraw *draw, XftFont *font, XftColor *colour,
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const gchar *text, gint *pos_y)
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{
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XGlyphInfo extents;
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gint len = strlen(text);
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XftTextExtentsUtf8(xdisplay, font, text, len, &extents);
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XftDrawStringUtf8(draw, colour, font, 4, *pos_y + extents.y, text, len);
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*pos_y += extents.height + 4;
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}
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static GdkPixmap *
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create_text_pixmap(GtkWidget *drawing_area, FT_Face face)
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{
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gint i, pos_y, textlen, alpha_size;
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GdkPixmap *pixmap;
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gint i, pixmap_width, pixmap_height, pos_y, textlen;
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GdkPixmap *pixmap = NULL;
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gchar *text;
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Display *xdisplay;
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Drawable xdrawable;
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Visual *xvisual;
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Colormap xcolormap;
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XftDraw *draw;
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XftColor colour;
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XGlyphInfo extents;
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XftFont *font;
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gint *sizes = NULL, n_sizes, alpha_size;
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text = _("The quick brown fox jumps over the lazy dog. 0123456789");
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textlen = strlen(text);
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/* create pixmap */
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gtk_widget_set_size_request(drawing_area, FONTAREA_WIDTH, FONTAREA_HEIGHT);
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gtk_widget_realize(drawing_area);
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pixmap = gdk_pixmap_new(drawing_area->window,
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FONTAREA_WIDTH, FONTAREA_HEIGHT, -1);
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if (!pixmap)
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return NULL;
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gdk_draw_rectangle(pixmap, drawing_area->style->white_gc,
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TRUE, 0, 0, FONTAREA_WIDTH, FONTAREA_HEIGHT);
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/* create the XftDraw */
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xdisplay = GDK_PIXMAP_XDISPLAY(pixmap);
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xdrawable = GDK_DRAWABLE_XID(pixmap);
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xvisual = GDK_VISUAL_XVISUAL(gdk_drawable_get_visual(pixmap));
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xcolormap = GDK_COLORMAP_XCOLORMAP(gdk_drawable_get_colormap(pixmap));
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draw = XftDrawCreate(xdisplay, xdrawable, xvisual, xcolormap);
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xdisplay = GDK_PIXMAP_XDISPLAY(drawing_area->window);
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xvisual = GDK_VISUAL_XVISUAL(gdk_drawable_get_visual(drawing_area->window));
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xcolormap = GDK_COLORMAP_XCOLORMAP(gdk_drawable_get_colormap(drawing_area->window));
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XftColorAllocName(xdisplay, xvisual, xcolormap, "black", &colour);
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pos_y = 4;
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/* work out what sizes to render */
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if (FT_IS_SCALABLE(face)) {
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n_sizes = 6;
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sizes = g_new(gint, n_sizes);
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sizes[0] = 8;
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sizes[1] = 10;
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sizes[2] = 12;
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sizes[3] = 24;
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sizes[4] = 48;
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sizes[5] = 72;
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alpha_size = 24;
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} else {
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alpha_size = face->available_sizes[0].height;
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/* use fixed sizes */
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n_sizes = face->num_fixed_sizes;
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sizes = g_new(gint, n_sizes);
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alpha_size = 0;
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for (i = 0; i < face->num_fixed_sizes; i++) {
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sizes[i] = face->available_sizes[i].height;
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/* work out which font size to render */
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if (face->available_sizes[i].height <= 24)
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alpha_size = face->available_sizes[i].height;
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else
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break;
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}
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}
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draw_text(xdisplay, draw, face, alpha_size, &colour,
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"abcdefghijklmnopqrstuvwxyz", 26, &pos_y);
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draw_text(xdisplay, draw, face, alpha_size, &colour,
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ", 26, &pos_y);
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draw_text(xdisplay, draw, face, alpha_size, &colour,
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"0123456789.:,;(*!?')", 20, &pos_y);
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/* calculate size of pixmap to use (with 4 pixels padding) ... */
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pixmap_width = 8;
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pixmap_height = 8;
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font = get_font(xdisplay, face, alpha_size);
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XftTextExtentsUtf8(xdisplay, font,
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lowercase_text, strlen(lowercase_text), &extents);
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pixmap_height += extents.height + 4;
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pixmap_width = MAX(pixmap_width, 8 + extents.width);
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XftTextExtentsUtf8(xdisplay, font,
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uppercase_text, strlen(uppercase_text), &extents);
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pixmap_height += extents.height + 4;
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pixmap_width = MAX(pixmap_width, 8 + extents.width);
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XftTextExtentsUtf8(xdisplay, font,
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punctuation_text, strlen(punctuation_text), &extents);
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pixmap_height += extents.height + 4;
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pixmap_width = MAX(pixmap_width, 8 + extents.width);
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XftFontClose(xdisplay, font);
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pixmap_height += 8;
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for (i = 0; i < n_sizes; i++) {
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font = get_font(xdisplay, face, sizes[i]);
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if (!font) continue;
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XftTextExtentsUtf8(xdisplay, font, text, textlen, &extents);
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pixmap_height += extents.height + 4;
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pixmap_width = MAX(pixmap_width, 8 + extents.width);
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XftFontClose(xdisplay, font);
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}
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/* create pixmap */
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gtk_widget_set_size_request(drawing_area, pixmap_width, pixmap_height);
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pixmap = gdk_pixmap_new(drawing_area->window,
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pixmap_width, pixmap_height, -1);
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if (!pixmap)
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goto end;
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gdk_draw_rectangle(pixmap, drawing_area->style->white_gc,
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TRUE, 0, 0, pixmap_width, pixmap_height);
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xdrawable = GDK_DRAWABLE_XID(pixmap);
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draw = XftDrawCreate(xdisplay, xdrawable, xvisual, xcolormap);
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/* draw text */
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pos_y = 4;
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font = get_font(xdisplay, face, alpha_size);
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draw_string(xdisplay, draw, font, &colour, lowercase_text, &pos_y);
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draw_string(xdisplay, draw, font, &colour, uppercase_text, &pos_y);
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draw_string(xdisplay, draw, font, &colour, punctuation_text, &pos_y);
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XftFontClose(xdisplay, font);
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pos_y += 8;
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/* bitmap fonts */
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if (!FT_IS_SCALABLE(face)) {
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for (i = 0; i < face->num_fixed_sizes; i++) {
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draw_text(xdisplay, draw, face, face->available_sizes[i].height,
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&colour, text, textlen, &pos_y);
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}
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} else {
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static const gint sizes[] = { 8, 10, 12, 24, 48, 72 };
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for (i = 0; i < G_N_ELEMENTS(sizes); i++) {
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draw_text(xdisplay, draw, face, sizes[i],
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&colour, text, textlen, &pos_y);
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}
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for (i = 0; i < n_sizes; i++) {
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font = get_font(xdisplay, face, sizes[i]);
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if (!font) continue;
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draw_string(xdisplay, draw, font, &colour, text, &pos_y);
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XftFontClose(xdisplay, font);
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}
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end:
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g_free(sizes);
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return pixmap;
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}
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@ -310,7 +350,7 @@ main(int argc, char **argv)
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FT_Face face;
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gchar *title;
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gint row;
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GtkWidget *window, *vbox, *table, *frame, *drawing_area;
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GtkWidget *window, *vbox, *table, *swin, *drawing_area;
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GdkPixmap *pixmap;
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GdkColor white = { 0, 0xffff, 0xffff, 0xffff };
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@ -353,14 +393,14 @@ main(int argc, char **argv)
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face->style_name, NULL);
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gtk_window_set_title(GTK_WINDOW(window), title);
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g_free(title);
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gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
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gtk_window_set_resizable(GTK_WINDOW(window), TRUE);
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vbox = gtk_vbox_new(FALSE, 0);
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gtk_container_add(GTK_CONTAINER(window), vbox);
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table = gtk_table_new(1, 2, FALSE);
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gtk_container_set_border_width(GTK_CONTAINER(table), 5);
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gtk_box_pack_start(GTK_BOX(vbox), table, TRUE, TRUE, 0);
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gtk_box_pack_start(GTK_BOX(vbox), table, FALSE, TRUE, 0);
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row = 0;
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add_face_info(table, &row, argv[1], face);
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@ -368,13 +408,16 @@ main(int argc, char **argv)
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gtk_table_set_col_spacings(GTK_TABLE(table), 8);
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gtk_table_set_row_spacings(GTK_TABLE(table), 2);
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frame = gtk_frame_new(NULL);
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gtk_frame_set_shadow_type(GTK_FRAME(frame), GTK_SHADOW_IN);
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gtk_box_pack_start(GTK_BOX(vbox), frame, FALSE, FALSE, 0);
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swin = gtk_scrolled_window_new(NULL, NULL);
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gtk_widget_set_size_request(swin, 500, 200);
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gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(swin),
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GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
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gtk_box_pack_start(GTK_BOX(vbox), swin, TRUE, TRUE, 0);
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drawing_area = gtk_drawing_area_new();
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gtk_widget_modify_bg(drawing_area, GTK_STATE_NORMAL, &white);
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gtk_container_add(GTK_CONTAINER(frame), drawing_area);
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gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(swin),
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drawing_area);
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pixmap = create_text_pixmap(drawing_area, face);
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