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/*
* Copyright 2016, Blender Foundation.
*
* 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.
*
*/
/** \file blender/draw/intern/draw_manager_text.c
* \ingroup draw
*/
#include "MEM_guardedalloc.h"
#include "BLI_listbase.h"
#include "BLI_string.h"
#include "BLI_math.h"
#include "BIF_gl.h"
#include "GPU_matrix.h"
#include "ED_screen.h"
#include "ED_view3d.h"
#include "UI_resources.h"
#include "UI_interface.h"
#include "WM_api.h"
#include "BLF_api.h"
#include "draw_manager_text.h"
typedef struct ViewCachedString {
struct ViewCachedString *next, *prev;
float vec[3];
union {
uchar ub[4];
int pack;
} col;
short sco[2];
short xoffs;
short flag;
int str_len;
/* str is allocated past the end */
char str[0];
} ViewCachedString;
typedef struct DRWTextStore {
ListBase list;
} DRWTextStore;
DRWTextStore *DRW_text_cache_create(void)
{
DRWTextStore *dt = MEM_callocN(sizeof(*dt), __func__);
return dt;
}
void DRW_text_cache_destroy(struct DRWTextStore *dt)
{
BLI_freelistN(&dt->list);
MEM_freeN(dt);
}
void DRW_text_cache_add(
DRWTextStore *dt,
const float co[3],
const char *str, const int str_len,
short xoffs, short flag,
const uchar col[4])
{
int alloc_len;
ViewCachedString *vos;
if (flag & DRW_TEXT_CACHE_STRING_PTR) {
BLI_assert(str_len == strlen(str));
alloc_len = sizeof(void *);
}
else {
alloc_len = str_len + 1;
}
vos = MEM_mallocN(sizeof(ViewCachedString) + alloc_len, __func__);
BLI_addtail(&dt->list, vos);
copy_v3_v3(vos->vec, co);
copy_v4_v4_uchar(vos->col.ub, col);
vos->xoffs = xoffs;
vos->flag = flag;
vos->str_len = str_len;
/* allocate past the end */
if (flag & DRW_TEXT_CACHE_STRING_PTR) {
memcpy(vos->str, &str, alloc_len);
}
else {
memcpy(vos->str, str, alloc_len);
}
}
void DRW_text_cache_draw(DRWTextStore *dt, ARegion *ar)
{
RegionView3D *rv3d = ar->regiondata;
ViewCachedString *vos;
int tot = 0;
/* project first and test */
for (vos = dt->list.first; vos; vos = vos->next) {
if (ED_view3d_project_short_ex(
ar,
(vos->flag & DRW_TEXT_CACHE_GLOBALSPACE) ? rv3d->persmat : rv3d->persmatob,
(vos->flag & DRW_TEXT_CACHE_LOCALCLIP) != 0,
vos->vec, vos->sco,
V3D_PROJ_TEST_CLIP_BB | V3D_PROJ_TEST_CLIP_WIN | V3D_PROJ_TEST_CLIP_NEAR) == V3D_PROJ_RET_OK)
{
tot++;
}
else {
vos->sco[0] = IS_CLIPPED;
}
}
if (tot) {
int col_pack_prev = 0;
if (rv3d->rflag & RV3D_CLIPPING) {
ED_view3d_clipping_disable();
}
float original_proj[4][4];
gpuGetProjectionMatrix(original_proj);
wmOrtho2_region_pixelspace(ar);
gpuPushMatrix();
gpuLoadIdentity();
const int font_id = BLF_default();
const uiStyle *style = UI_style_get();
BLF_size(font_id, style->widget.points * U.pixelsize, U.dpi);
for (vos = dt->list.first; vos; vos = vos->next) {
if (vos->sco[0] != IS_CLIPPED) {
if (col_pack_prev != vos->col.pack) {
BLF_color4ubv(font_id, vos->col.ub);
col_pack_prev = vos->col.pack;
}
BLF_position(
font_id,
(float)(vos->sco[0] + vos->xoffs), (float)(vos->sco[1]), 2.0f);
((vos->flag & DRW_TEXT_CACHE_ASCII) ?
BLF_draw_ascii :
BLF_draw
)(font_id,
(vos->flag & DRW_TEXT_CACHE_STRING_PTR) ? *((const char **)vos->str) : vos->str,
vos->str_len);
}
}
gpuPopMatrix();
gpuLoadProjectionMatrix(original_proj);
if (rv3d->rflag & RV3D_CLIPPING) {
ED_view3d_clipping_enable();
}
}
}
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