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/**
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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.
*
* The Original Code is Copyright (C) 2009 Blender Foundation.
* All rights reserved.
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <limits.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "MEM_guardedalloc.h"
#include "DNA_screen_types.h"
#include "DNA_userdef_types.h"
#include "BLI_math.h"
#include "BLI_listbase.h"
#include "BLI_rect.h"
#include "BLI_string.h"
#include "BKE_context.h"
#include "BKE_global.h"
#include "BKE_utildefines.h"
#include "BIF_gl.h"
#include "BIF_glutil.h"
#include "BLF_api.h"
#include "UI_interface.h"
#include "ED_datafiles.h"
#include "interface_intern.h"
/* style + theme + layout-engine = UI */
/*
This is a complete set of layout rules, the 'state' of the Layout
Engine. Multiple styles are possible, defined via C or Python. Styles
get a name, and will typically get activated per region type, like
"Header", or "Listview" or "Toolbar". Properties of Style definitions
are:
- default collumn properties, internal spacing, aligning, min/max width
- button alignment rules (for groups)
- label placement rules
- internal labeling or external labeling default
- default minimum widths for buttons/labels (in amount of characters)
- font types, styles and relative sizes for Panel titles, labels, etc.
*/
/* ********************************************** */
static uiStyle *ui_style_new(ListBase *styles, const char *name)
{
uiStyle *style= MEM_callocN(sizeof(uiStyle), "new style");
BLI_addtail(styles, style);
BLI_strncpy(style->name, name, MAX_STYLE_NAME);
style->panelzoom= 1.0;
style->paneltitle.uifont_id= UIFONT_DEFAULT;
style->paneltitle.points= 12;
style->paneltitle.kerning= 1;
style->paneltitle.shadow= 1;
style->paneltitle.shadx= 0;
style->paneltitle.shady= -1;
style->paneltitle.shadowalpha= 0.15f;
style->paneltitle.shadowcolor= 1.0f;
style->grouplabel.uifont_id= UIFONT_DEFAULT;
style->grouplabel.points= 12;
style->grouplabel.kerning= 1;
style->grouplabel.shadow= 3;
style->grouplabel.shadx= 0;
style->grouplabel.shady= -1;
style->grouplabel.shadowalpha= 0.25f;
style->widgetlabel.uifont_id= UIFONT_DEFAULT;
style->widgetlabel.points= 11;
style->widgetlabel.kerning= 1;
style->widgetlabel.shadow= 3;
style->widgetlabel.shadx= 0;
style->widgetlabel.shady= -1;
style->widgetlabel.shadowalpha= 0.15f;
style->widgetlabel.shadowcolor= 1.0f;
style->widget.uifont_id= UIFONT_DEFAULT;
style->widget.points= 11;
style->widget.kerning= 1;
style->widget.shadowalpha= 0.25f;
style->columnspace= 8;
style->templatespace= 5;
style->boxspace= 5;
style->buttonspacex= 8;
style->buttonspacey= 2;
style->panelspace= 8;
style->panelouter= 4;
return style;
}
static uiFont *uifont_to_blfont(int id)
{
uiFont *font= U.uifonts.first;
for(; font; font= font->next) {
if(font->uifont_id==id) {
return font;
}
}
return U.uifonts.first;
}
/* *************** draw ************************ */
void uiStyleFontDraw(uiFontStyle *fs, rcti *rect, char *str)
{
float height;
int xofs=0, yofs;
uiStyleFontSet(fs);
height= BLF_height("2"); /* correct offset is on baseline, the j is below that */
yofs= floor( 0.5f*(rect->ymax - rect->ymin - height));
if(fs->align==UI_STYLE_TEXT_CENTER)
xofs= floor( 0.5f*(rect->xmax - rect->xmin - BLF_width(str)));
else if(fs->align==UI_STYLE_TEXT_RIGHT)
xofs= rect->xmax - rect->xmin - BLF_width(str) - 1;
/* clip is very strict, so we give it some space */
BLF_clipping(rect->xmin-1, rect->ymin-4, rect->xmax+1, rect->ymax+4);
BLF_enable(BLF_CLIPPING);
BLF_position(rect->xmin+xofs, rect->ymin+yofs, 0.0f);
if (fs->shadow) {
BLF_enable(BLF_SHADOW);
BLF_shadow(fs->shadow, fs->shadowcolor, fs->shadowcolor, fs->shadowcolor, fs->shadowalpha);
BLF_shadow_offset(fs->shadx, fs->shady);
}
if (fs->kerning == 1)
BLF_enable(BLF_KERNING_DEFAULT);
BLF_draw(str);
BLF_disable(BLF_CLIPPING);
if (fs->shadow)
BLF_disable(BLF_SHADOW);
if (fs->kerning == 1)
BLF_disable(BLF_KERNING_DEFAULT);
}
/* drawn same as above, but at 90 degree angle */
void uiStyleFontDrawRotated(uiFontStyle *fs, rcti *rect, char *str)
{
float height;
int xofs, yofs;
float angle;
rcti txtrect;
uiStyleFontSet(fs);
height= BLF_height("2"); /* correct offset is on baseline, the j is below that */
/* becomes x-offset when rotated */
xofs= floor( 0.5f*(rect->ymax - rect->ymin - height)) + 1;
/* ignore UI_STYLE, always aligned to top */
/* rotate counter-clockwise for now (assumes left-to-right language)*/
xofs+= height;
yofs= BLF_width(str) + 5;
angle= 90.0f;
/* translate rect to vertical */
txtrect.xmin= rect->xmin - (rect->ymax - rect->ymin);
txtrect.ymin= rect->ymin - (rect->xmax - rect->xmin);
txtrect.xmax= rect->xmin;
txtrect.ymax= rect->ymin;
/* clip is very strict, so we give it some space */
/* clipping is done without rotation, so make rect big enough to contain both positions */
BLF_clipping(txtrect.xmin-1, txtrect.ymin-yofs-xofs-4, rect->xmax+1, rect->ymax+4);
BLF_enable(BLF_CLIPPING);
BLF_position(txtrect.xmin+xofs, txtrect.ymax-yofs, 0.0f);
BLF_enable(BLF_ROTATION);
BLF_rotation(angle);
if (fs->shadow) {
BLF_enable(BLF_SHADOW);
BLF_shadow(fs->shadow, fs->shadowcolor, fs->shadowcolor, fs->shadowcolor, fs->shadowalpha);
BLF_shadow_offset(fs->shadx, fs->shady);
}
if (fs->kerning == 1)
BLF_enable(BLF_KERNING_DEFAULT);
BLF_draw(str);
BLF_disable(BLF_ROTATION);
BLF_disable(BLF_CLIPPING);
if (fs->shadow)
BLF_disable(BLF_SHADOW);
if (fs->kerning == 1)
BLF_disable(BLF_KERNING_DEFAULT);
}
/* ************** helpers ************************ */
/* temporarily, does widget font */
int UI_GetStringWidth(char *str)
{
uiStyle *style= U.uistyles.first;
uiStyleFontSet(&style->widget);
return BLF_width(str);
}
/* temporarily, does widget font */
void UI_DrawString(float x, float y, char *str)
{
uiStyle *style= U.uistyles.first;
uiStyleFontSet(&style->widget);
BLF_position(x, y, 0.0f);
BLF_draw(str);
}
/* ************** init exit ************************ */
/* called on each .B.blend read */
/* reading without uifont will create one */
void uiStyleInit(void)
{
uiFont *font= U.uifonts.first;
uiStyle *style= U.uistyles.first;
/* recover from uninitialized dpi */
CLAMP(U.dpi, 72, 240);
/* default builtin */
if(font==NULL) {
font= MEM_callocN(sizeof(uiFont), "ui font");
BLI_addtail(&U.uifonts, font);
strcpy(font->filename, "default");
font->uifont_id= UIFONT_DEFAULT;
}
for(font= U.uifonts.first; font; font= font->next) {
if(font->uifont_id==UIFONT_DEFAULT) {
font->blf_id= BLF_load_mem("default", (unsigned char*)datatoc_bfont_ttf, datatoc_bfont_ttf_size);
}
else {
font->blf_id= BLF_load(font->filename);
if(font->blf_id == -1)
font->blf_id= BLF_load_mem("default", (unsigned char*)datatoc_bfont_ttf, datatoc_bfont_ttf_size);
}
if (font->blf_id == -1) {
if (G.f & G_DEBUG)
printf("uiStyleInit error, no fonts available\n");
}
else {
BLF_set(font->blf_id);
/* ? just for speed to initialize?
* Yes, this build the glyph cache and create
* the texture.
*/
BLF_size(11, U.dpi);
BLF_size(12, U.dpi);
BLF_size(14, U.dpi);
}
}
if(style==NULL) {
ui_style_new(&U.uistyles, "Default Style");
}
}
void uiStyleFontSet(uiFontStyle *fs)
{
uiFont *font= uifont_to_blfont(fs->uifont_id);
BLF_set(font->blf_id);
BLF_size(fs->points, U.dpi);
}
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