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|
/*
* 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) 2008, Blender Foundation
* This is a new part of Blender
*/
/** \file
* \ingroup edgpencil
*/
#include <float.h>
#include <math.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "MEM_guardedalloc.h"
#include "BLI_sys_types.h"
#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "BLF_api.h"
#include "BLT_translation.h"
#include "DNA_gpencil_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
#include "DNA_userdef_types.h"
#include "DNA_view3d_types.h"
#include "BKE_context.h"
#include "BKE_global.h"
#include "BKE_gpencil.h"
#include "WM_api.h"
#include "BIF_glutil.h"
#include "GPU_immediate.h"
#include "GPU_state.h"
#include "ED_gpencil.h"
#include "ED_screen.h"
#include "ED_space_api.h"
#include "ED_view3d.h"
#include "UI_interface_icons.h"
#include "UI_resources.h"
/* ************************************************** */
/* GREASE PENCIL DRAWING */
/* ----- General Defines ------ */
/* flags for sflag */
typedef enum eDrawStrokeFlags {
/** don't draw status info */
GP_DRAWDATA_NOSTATUS = (1 << 0),
/** only draw 3d-strokes */
GP_DRAWDATA_ONLY3D = (1 << 1),
/** only draw 'canvas' strokes */
GP_DRAWDATA_ONLYV2D = (1 << 2),
/** only draw 'image' strokes */
GP_DRAWDATA_ONLYI2D = (1 << 3),
/** special hack for drawing strokes in Image Editor (weird coordinates) */
GP_DRAWDATA_IEDITHACK = (1 << 4),
/** don't draw xray in 3D view (which is default) */
GP_DRAWDATA_NO_XRAY = (1 << 5),
/** no onionskins should be drawn (for animation playback) */
GP_DRAWDATA_NO_ONIONS = (1 << 6),
} eDrawStrokeFlags;
/* ----- Tool Buffer Drawing ------ */
static void annotation_draw_stroke_arrow_buffer(uint pos,
const float *corner_point,
const float *arrow_coords,
const int arrow_style)
{
immBeginAtMost(GPU_PRIM_LINE_STRIP, arrow_style);
switch (arrow_style) {
case GP_STROKE_ARROWSTYLE_SEGMENT:
immVertex2f(pos, arrow_coords[0], arrow_coords[1]);
immVertex2f(pos, arrow_coords[2], arrow_coords[3]);
break;
case GP_STROKE_ARROWSTYLE_CLOSED:
immVertex2f(pos, arrow_coords[0], arrow_coords[1]);
immVertex2f(pos, arrow_coords[2], arrow_coords[3]);
immVertex2f(pos, arrow_coords[4], arrow_coords[5]);
immVertex2f(pos, arrow_coords[0], arrow_coords[1]);
break;
case GP_STROKE_ARROWSTYLE_OPEN:
immVertex2f(pos, arrow_coords[0], arrow_coords[1]);
immVertex2f(pos, corner_point[0], corner_point[1]);
immVertex2f(pos, arrow_coords[2], arrow_coords[3]);
break;
case GP_STROKE_ARROWSTYLE_SQUARE:
immVertex2f(pos, corner_point[0], corner_point[1]);
immVertex2f(pos, arrow_coords[0], arrow_coords[1]);
immVertex2f(pos, arrow_coords[4], arrow_coords[5]);
immVertex2f(pos, arrow_coords[6], arrow_coords[7]);
immVertex2f(pos, arrow_coords[2], arrow_coords[3]);
immVertex2f(pos, corner_point[0], corner_point[1]);
break;
default:
break;
}
immEnd();
}
/* draw stroke defined in buffer (simple ogl lines/points for now, as dotted lines) */
static void annotation_draw_stroke_buffer(bGPdata *gps,
short thickness,
short dflag,
const float ink[4])
{
bGPdata_Runtime runtime = gps->runtime;
const tGPspoint *points = runtime.sbuffer;
int totpoints = runtime.sbuffer_used;
short sflag = runtime.sbuffer_sflag;
int draw_points = 0;
/* error checking */
if ((points == NULL) || (totpoints <= 0)) {
return;
}
/* check if buffer can be drawn */
if (dflag & (GP_DRAWDATA_ONLY3D | GP_DRAWDATA_ONLYV2D)) {
return;
}
if (sflag & GP_STROKE_ERASER) {
/* don't draw stroke at all! */
return;
}
GPUVertFormat *format = immVertexFormat();
uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
const tGPspoint *pt = points;
if (totpoints == 1) {
/* if drawing a single point, draw it larger */
GPU_point_size((float)(thickness + 2) * points->pressure);
immBindBuiltinProgram(GPU_SHADER_3D_POINT_UNIFORM_SIZE_UNIFORM_COLOR_AA);
immUniformColor3fvAlpha(ink, ink[3]);
immBegin(GPU_PRIM_POINTS, 1);
immVertex2fv(pos, &pt->x);
}
else {
float oldpressure = points[0].pressure;
/* draw stroke curve */
immBindBuiltinProgram(GPU_SHADER_3D_POLYLINE_UNIFORM_COLOR);
float viewport[4];
GPU_viewport_size_get_f(viewport);
immUniform2fv("viewportSize", &viewport[2]);
immUniform1f("lineWidth", max_ff(oldpressure * thickness, 1.0) * U.pixelsize);
immUniformColor3fvAlpha(ink, ink[3]);
immBeginAtMost(GPU_PRIM_LINE_STRIP, totpoints);
for (int i = 0; i < totpoints; i++, pt++) {
/* If there was a significant pressure change,
* stop the curve, change the thickness of the stroke,
* and continue drawing again (since line-width cannot change in middle of GL_LINE_STRIP).
*/
if (fabsf(pt->pressure - oldpressure) > 0.2f) {
/* need to have 2 points to avoid immEnd assert error */
if (draw_points < 2) {
immVertex2fv(pos, &(pt - 1)->x);
}
immEnd();
draw_points = 0;
immUniform1f("lineWidth", max_ff(pt->pressure * thickness, 1.0) * U.pixelsize);
immBeginAtMost(GPU_PRIM_LINE_STRIP, totpoints - i + 1);
/* need to roll-back one point to ensure that there are no gaps in the stroke */
if (i != 0) {
immVertex2fv(pos, &(pt - 1)->x);
draw_points++;
}
oldpressure = pt->pressure; /* reset our threshold */
}
/* now the point we want */
immVertex2fv(pos, &pt->x);
draw_points++;
}
/* need to have 2 points to avoid immEnd assert error */
if (draw_points < 2) {
immVertex2fv(pos, &(pt - 1)->x);
}
}
immEnd();
/* Draw arrow stroke. */
if (totpoints > 1) {
/* Draw ending arrow stroke. */
if ((sflag & GP_STROKE_USE_ARROW_END) &&
(runtime.arrow_end_style != GP_STROKE_ARROWSTYLE_NONE)) {
float end[2];
copy_v2_fl2(end, points[1].x, points[1].y);
annotation_draw_stroke_arrow_buffer(pos, end, runtime.arrow_end, runtime.arrow_end_style);
}
/* Draw starting arrow stroke. */
if ((sflag & GP_STROKE_USE_ARROW_START) &&
(runtime.arrow_start_style != GP_STROKE_ARROWSTYLE_NONE)) {
float start[2];
copy_v2_fl2(start, points[0].x, points[0].y);
annotation_draw_stroke_arrow_buffer(
pos, start, runtime.arrow_start, runtime.arrow_start_style);
}
}
immUnbindProgram();
}
/* --------- 2D Stroke Drawing Helpers --------- */
/* change in parameter list */
static void annotation_calc_2d_stroke_fxy(
const float pt[3], short sflag, int offsx, int offsy, int winx, int winy, float r_co[2])
{
if (sflag & GP_STROKE_2DSPACE) {
r_co[0] = pt[0];
r_co[1] = pt[1];
}
else if (sflag & GP_STROKE_2DIMAGE) {
const float x = (float)((pt[0] * winx) + offsx);
const float y = (float)((pt[1] * winy) + offsy);
r_co[0] = x;
r_co[1] = y;
}
else {
const float x = (float)(pt[0] / 100 * winx) + offsx;
const float y = (float)(pt[1] / 100 * winy) + offsy;
r_co[0] = x;
r_co[1] = y;
}
}
/* ----- Existing Strokes Drawing (3D and Point) ------ */
/* draw a given stroke - just a single dot (only one point) */
static void annotation_draw_stroke_point(const bGPDspoint *points,
short thickness,
short sflag,
int offsx,
int offsy,
int winx,
int winy,
const float ink[4])
{
const bGPDspoint *pt = points;
/* get final position using parent matrix */
float fpt[3];
copy_v3_v3(fpt, &pt->x);
GPUVertFormat *format = immVertexFormat();
uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
if (sflag & GP_STROKE_3DSPACE) {
immBindBuiltinProgram(GPU_SHADER_3D_POINT_UNIFORM_SIZE_UNIFORM_COLOR_AA);
}
else {
immBindBuiltinProgram(GPU_SHADER_2D_POINT_UNIFORM_SIZE_UNIFORM_COLOR_AA);
/* get 2D coordinates of point */
float co[3] = {0.0f};
annotation_calc_2d_stroke_fxy(fpt, sflag, offsx, offsy, winx, winy, co);
copy_v3_v3(fpt, co);
}
/* set color */
immUniformColor3fvAlpha(ink, ink[3]);
/* set point thickness (since there's only one of these) */
immUniform1f("size", (float)(thickness + 2) * pt->pressure);
immBegin(GPU_PRIM_POINTS, 1);
immVertex3fv(pos, fpt);
immEnd();
immUnbindProgram();
}
/* draw a given stroke in 3d (i.e. in 3d-space), using simple ogl lines */
static void annotation_draw_stroke_3d(
const bGPDspoint *points, int totpoints, short thickness, const float ink[4], bool cyclic)
{
float curpressure = points[0].pressure;
float cyclic_fpt[3];
int draw_points = 0;
/* if cyclic needs one vertex more */
int cyclic_add = 0;
if (cyclic) {
cyclic_add++;
}
GPUVertFormat *format = immVertexFormat();
uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 3, GPU_FETCH_FLOAT);
immBindBuiltinProgram(GPU_SHADER_3D_POLYLINE_UNIFORM_COLOR);
float viewport[4];
GPU_viewport_size_get_f(viewport);
immUniform2fv("viewportSize", &viewport[2]);
immUniform1f("lineWidth", max_ff(curpressure * thickness, 1.0) * U.pixelsize);
immUniformColor3fvAlpha(ink, ink[3]);
/* draw stroke curve */
immBeginAtMost(GPU_PRIM_LINE_STRIP, totpoints + cyclic_add);
const bGPDspoint *pt = points;
for (int i = 0; i < totpoints; i++, pt++) {
/* If there was a significant pressure change, stop the curve,
* change the thickness of the stroke, and continue drawing again
* (since line-width cannot change in middle of GL_LINE_STRIP)
* Note: we want more visible levels of pressures when thickness is bigger.
*/
if (fabsf(pt->pressure - curpressure) > 0.2f / (float)thickness) {
/* if the pressure changes before get at least 2 vertices,
* need to repeat last point to avoid assert in immEnd() */
if (draw_points < 2) {
const bGPDspoint *pt2 = pt - 1;
immVertex3fv(pos, &pt2->x);
}
immEnd();
draw_points = 0;
curpressure = pt->pressure;
immUniform1f("lineWidth", max_ff(curpressure * thickness, 1.0) * U.pixelsize);
immBeginAtMost(GPU_PRIM_LINE_STRIP, totpoints - i + 1 + cyclic_add);
/* need to roll-back one point to ensure that there are no gaps in the stroke */
if (i != 0) {
const bGPDspoint *pt2 = pt - 1;
immVertex3fv(pos, &pt2->x);
draw_points++;
}
}
/* now the point we want */
immVertex3fv(pos, &pt->x);
draw_points++;
if (cyclic && i == 0) {
/* save first point to use in cyclic */
copy_v3_v3(cyclic_fpt, &pt->x);
}
}
if (cyclic) {
/* draw line to first point to complete the cycle */
immVertex3fv(pos, cyclic_fpt);
draw_points++;
}
/* if less of two points, need to repeat last point to avoid assert in immEnd() */
if (draw_points < 2) {
const bGPDspoint *pt2 = pt - 1;
immVertex3fv(pos, &pt2->x);
}
immEnd();
immUnbindProgram();
}
/* Draw a given stroke in 2d. */
static void annotation_draw_stroke_2d(const bGPDspoint *points,
int totpoints,
short thickness_s,
short sflag,
int offsx,
int offsy,
int winx,
int winy,
const float ink[4])
{
if (totpoints == 0) {
return;
}
float thickness = (float)thickness_s;
GPUVertFormat *format = immVertexFormat();
uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
const bGPDspoint *pt;
const bGPDspoint *pt_prev;
int draw_points = 0;
float co[2];
float oldpressure = points[0].pressure;
if (totpoints == 1) {
/* if drawing a single point, draw it larger */
GPU_point_size((float)(thickness + 2) * points->pressure);
immBindBuiltinProgram(GPU_SHADER_3D_POINT_UNIFORM_SIZE_UNIFORM_COLOR_AA);
immUniformColor3fvAlpha(ink, ink[3]);
immBegin(GPU_PRIM_POINTS, 1);
annotation_calc_2d_stroke_fxy(&points->x, sflag, offsx, offsy, winx, winy, co);
immVertex2fv(pos, co);
}
else {
/* draw stroke curve */
immBindBuiltinProgram(GPU_SHADER_3D_POLYLINE_UNIFORM_COLOR);
immUniformColor3fvAlpha(ink, ink[3]);
float viewport[4];
GPU_viewport_size_get_f(viewport);
immUniform2fv("viewportSize", &viewport[2]);
immUniform1f("lineWidth", max_ff(oldpressure * thickness, 1.0) * U.pixelsize);
immBeginAtMost(GPU_PRIM_LINE_STRIP, totpoints);
for (int i = 0; i < totpoints; i++) {
pt = &points[i];
/* If there was a significant pressure change,
* stop the curve, change the thickness of the stroke,
* and continue drawing again (since line-width cannot change in middle of GL_LINE_STRIP).
*/
if (fabsf(pt->pressure - oldpressure) > 0.2f) {
/* need to have 2 points to avoid immEnd assert error */
if (draw_points < 2) {
pt_prev = &points[i - 1];
annotation_calc_2d_stroke_fxy(&pt_prev->x, sflag, offsx, offsy, winx, winy, co);
immVertex2fv(pos, co);
}
immEnd();
draw_points = 0;
immUniform1f("lineWidth", max_ff(pt->pressure * thickness, 1.0) * U.pixelsize);
immBeginAtMost(GPU_PRIM_LINE_STRIP, totpoints - i + 1);
/* need to roll-back one point to ensure that there are no gaps in the stroke */
if (i != 0) {
pt_prev = &points[i - 1];
annotation_calc_2d_stroke_fxy(&pt_prev->x, sflag, offsx, offsy, winx, winy, co);
immVertex2fv(pos, co);
draw_points++;
}
oldpressure = pt->pressure; /* reset our threshold */
}
/* now the point we want */
annotation_calc_2d_stroke_fxy(&pt->x, sflag, offsx, offsy, winx, winy, co);
immVertex2fv(pos, co);
draw_points++;
}
/* need to have 2 points to avoid immEnd assert error */
if (draw_points < 2) {
pt_prev = &points[0];
annotation_calc_2d_stroke_fxy(&pt_prev->x, sflag, offsx, offsy, winx, winy, co);
immVertex2fv(pos, co);
}
}
immEnd();
immUnbindProgram();
}
/* ----- Strokes Drawing ------ */
/* Helper for doing all the checks on whether a stroke can be drawn */
static bool annotation_can_draw_stroke(const bGPDstroke *gps, const int dflag)
{
/* skip stroke if it isn't in the right display space for this drawing context */
/* 1) 3D Strokes */
if ((dflag & GP_DRAWDATA_ONLY3D) && !(gps->flag & GP_STROKE_3DSPACE)) {
return false;
}
if (!(dflag & GP_DRAWDATA_ONLY3D) && (gps->flag & GP_STROKE_3DSPACE)) {
return false;
}
/* 2) Screen Space 2D Strokes */
if ((dflag & GP_DRAWDATA_ONLYV2D) && !(gps->flag & GP_STROKE_2DSPACE)) {
return false;
}
if (!(dflag & GP_DRAWDATA_ONLYV2D) && (gps->flag & GP_STROKE_2DSPACE)) {
return false;
}
/* 3) Image Space (2D) */
if ((dflag & GP_DRAWDATA_ONLYI2D) && !(gps->flag & GP_STROKE_2DIMAGE)) {
return false;
}
if (!(dflag & GP_DRAWDATA_ONLYI2D) && (gps->flag & GP_STROKE_2DIMAGE)) {
return false;
}
/* skip stroke if it doesn't have any valid data */
if ((gps->points == NULL) || (gps->totpoints < 1)) {
return false;
}
/* stroke can be drawn */
return true;
}
/* draw a set of strokes */
static void annotation_draw_strokes(const bGPDframe *gpf,
int offsx,
int offsy,
int winx,
int winy,
int dflag,
short lthick,
const float color[4])
{
GPU_program_point_size(true);
LISTBASE_FOREACH (bGPDstroke *, gps, &gpf->strokes) {
/* check if stroke can be drawn */
if (annotation_can_draw_stroke(gps, dflag) == false) {
continue;
}
/* check which stroke-drawer to use */
if (dflag & GP_DRAWDATA_ONLY3D) {
const int no_xray = (dflag & GP_DRAWDATA_NO_XRAY);
int mask_orig = 0;
if (no_xray) {
glGetIntegerv(GL_DEPTH_WRITEMASK, &mask_orig);
glDepthMask(0);
GPU_depth_test(true);
/* first arg is normally rv3d->dist, but this isn't
* available here and seems to work quite well without */
bglPolygonOffset(1.0f, 1.0f);
}
/* 3D Lines - OpenGL primitives-based */
if (gps->totpoints == 1) {
annotation_draw_stroke_point(
gps->points, lthick, gps->flag, offsx, offsy, winx, winy, color);
}
else {
annotation_draw_stroke_3d(
gps->points, gps->totpoints, lthick, color, gps->flag & GP_STROKE_CYCLIC);
}
if (no_xray) {
glDepthMask(mask_orig);
GPU_depth_test(false);
bglPolygonOffset(0.0, 0.0);
}
}
else {
/* 2D Strokes... */
if (gps->totpoints == 1) {
annotation_draw_stroke_point(
gps->points, lthick, gps->flag, offsx, offsy, winx, winy, color);
}
else {
annotation_draw_stroke_2d(
gps->points, gps->totpoints, lthick, gps->flag, offsx, offsy, winx, winy, color);
}
}
}
GPU_program_point_size(false);
}
/* ----- General Drawing ------ */
/* draw onion-skinning for a layer */
static void annotation_draw_onionskins(
bGPDlayer *gpl, bGPDframe *gpf, int offsx, int offsy, int winx, int winy, int dflag)
{
const float alpha = 1.0f;
float color[4];
/* 1) Draw Previous Frames First */
copy_v3_v3(color, gpl->gcolor_prev);
if (gpl->gstep > 0) {
bGPDframe *gf;
float fac;
/* draw previous frames first */
for (gf = gpf->prev; gf; gf = gf->prev) {
/* check if frame is drawable */
if ((gpf->framenum - gf->framenum) <= gpl->gstep) {
/* alpha decreases with distance from curframe index */
fac = 1.0f - ((float)(gpf->framenum - gf->framenum) / (float)(gpl->gstep + 1));
color[3] = alpha * fac * 0.66f;
annotation_draw_strokes(gf, offsx, offsy, winx, winy, dflag, gpl->thickness, color);
}
else {
break;
}
}
}
else if (gpl->gstep == 0) {
/* draw the strokes for the ghost frames (at half of the alpha set by user) */
if (gpf->prev) {
color[3] = (alpha / 7);
annotation_draw_strokes(gpf->prev, offsx, offsy, winx, winy, dflag, gpl->thickness, color);
}
}
else {
/* don't draw - disabled */
}
/* 2) Now draw next frames */
copy_v3_v3(color, gpl->gcolor_next);
if (gpl->gstep_next > 0) {
bGPDframe *gf;
float fac;
/* now draw next frames */
for (gf = gpf->next; gf; gf = gf->next) {
/* check if frame is drawable */
if ((gf->framenum - gpf->framenum) <= gpl->gstep_next) {
/* alpha decreases with distance from curframe index */
fac = 1.0f - ((float)(gf->framenum - gpf->framenum) / (float)(gpl->gstep_next + 1));
color[3] = alpha * fac * 0.66f;
annotation_draw_strokes(gf, offsx, offsy, winx, winy, dflag, gpl->thickness, color);
}
else {
break;
}
}
}
else if (gpl->gstep_next == 0) {
/* draw the strokes for the ghost frames (at half of the alpha set by user) */
if (gpf->next) {
color[3] = (alpha / 4);
annotation_draw_strokes(gpf->next, offsx, offsy, winx, winy, dflag, gpl->thickness, color);
}
}
else {
/* don't draw - disabled */
}
}
/* loop over gpencil data layers, drawing them */
static void annotation_draw_data_layers(
bGPdata *gpd, int offsx, int offsy, int winx, int winy, int cfra, int dflag)
{
float ink[4];
LISTBASE_FOREACH (bGPDlayer *, gpl, &gpd->layers) {
/* verify never thickness is less than 1 */
CLAMP_MIN(gpl->thickness, 1.0f);
short lthick = gpl->thickness;
/* apply layer opacity */
copy_v3_v3(ink, gpl->color);
ink[3] = gpl->opacity;
/* don't draw layer if hidden */
if (gpl->flag & GP_LAYER_HIDE) {
continue;
}
/* get frame to draw */
bGPDframe *gpf = BKE_gpencil_layer_frame_get(gpl, cfra, GP_GETFRAME_USE_PREV);
if (gpf == NULL) {
continue;
}
/* Add layer drawing settings to the set of "draw flags"
* NOTE: If the setting doesn't apply, it *must* be cleared,
* as dflag's carry over from the previous layer
*/
/* xray... */
SET_FLAG_FROM_TEST(dflag, gpl->flag & GP_LAYER_NO_XRAY, GP_DRAWDATA_NO_XRAY);
/* Draw 'onionskins' (frame left + right) */
if (gpl->onion_flag & GP_LAYER_ONIONSKIN) {
annotation_draw_onionskins(gpl, gpf, offsx, offsy, winx, winy, dflag);
}
/* draw the strokes already in active frame */
annotation_draw_strokes(gpf, offsx, offsy, winx, winy, dflag, lthick, ink);
/* Check if may need to draw the active stroke cache, only if this layer is the active layer
* that is being edited. (Stroke buffer is currently stored in gp-data)
*/
if (ED_gpencil_session_active() && (gpl->flag & GP_LAYER_ACTIVE) &&
(gpf->flag & GP_FRAME_PAINT)) {
/* Buffer stroke needs to be drawn with a different linestyle
* to help differentiate them from normal strokes.
*
* It should also be noted that sbuffer contains temporary point types
* i.e. tGPspoints NOT bGPDspoints
*/
annotation_draw_stroke_buffer(gpd, lthick, dflag, ink);
}
}
}
/* draw grease-pencil datablock */
static void annotation_draw_data(
bGPdata *gpd, int offsx, int offsy, int winx, int winy, int cfra, int dflag)
{
/* turn on smooth lines (i.e. anti-aliasing) */
GPU_line_smooth(true);
/* turn on alpha-blending */
GPU_blend_set_func_separate(
GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA, GPU_ONE, GPU_ONE_MINUS_SRC_ALPHA);
GPU_blend(true);
/* draw! */
annotation_draw_data_layers(gpd, offsx, offsy, winx, winy, cfra, dflag);
/* turn off alpha blending, then smooth lines */
GPU_blend(false); // alpha blending
GPU_line_smooth(false); // smooth lines
}
/* if we have strokes for scenes (3d view)/clips (movie clip editor)
* and objects/tracks, multiple data blocks have to be drawn */
static void annotation_draw_data_all(Scene *scene,
bGPdata *gpd,
int offsx,
int offsy,
int winx,
int winy,
int cfra,
int dflag,
const char spacetype)
{
bGPdata *gpd_source = NULL;
if (scene) {
if (spacetype == SPACE_VIEW3D) {
gpd_source = (scene->gpd ? scene->gpd : NULL);
}
else if (spacetype == SPACE_CLIP && scene->clip) {
/* currently drawing only gpencil data from either clip or track,
* but not both - XXX fix logic behind */
gpd_source = (scene->clip->gpd ? scene->clip->gpd : NULL);
}
if (gpd_source) {
annotation_draw_data(gpd_source, offsx, offsy, winx, winy, cfra, dflag);
}
}
/* scene/clip data has already been drawn, only object/track data is drawn here
* if gpd_source == gpd, we don't have any object/track data and we can skip */
if (gpd_source == NULL || (gpd_source && gpd_source != gpd)) {
annotation_draw_data(gpd, offsx, offsy, winx, winy, cfra, dflag);
}
}
/* ----- Grease Pencil Sketches Drawing API ------ */
/* ............................
* XXX
* We need to review the calls below, since they may be/are not that suitable for
* the new ways that we intend to be drawing data...
* ............................ */
/* draw grease-pencil sketches to specified 2d-view that uses ibuf corrections */
void ED_annotation_draw_2dimage(const bContext *C)
{
wmWindowManager *wm = CTX_wm_manager(C);
ScrArea *area = CTX_wm_area(C);
ARegion *region = CTX_wm_region(C);
Scene *scene = CTX_data_scene(C);
int offsx, offsy, sizex, sizey;
int dflag = GP_DRAWDATA_NOSTATUS;
bGPdata *gpd = ED_annotation_data_get_active(C);
if (gpd == NULL) {
return;
}
/* calculate rect */
switch (area->spacetype) {
case SPACE_IMAGE: /* image */
case SPACE_CLIP: /* clip */
{
/* just draw using standard scaling (settings here are currently ignored anyways) */
/* FIXME: the opengl poly-strokes don't draw at right thickness when done this way,
* so disabled. */
offsx = 0;
offsy = 0;
sizex = region->winx;
sizey = region->winy;
wmOrtho2(
region->v2d.cur.xmin, region->v2d.cur.xmax, region->v2d.cur.ymin, region->v2d.cur.ymax);
dflag |= GP_DRAWDATA_ONLYV2D | GP_DRAWDATA_IEDITHACK;
break;
}
case SPACE_SEQ: /* sequence */
{
/* just draw using standard scaling (settings here are currently ignored anyways) */
offsx = 0;
offsy = 0;
sizex = region->winx;
sizey = region->winy;
/* NOTE: I2D was used in 2.4x, but the old settings for that have been deprecated
* and everything moved to standard View2d
*/
dflag |= GP_DRAWDATA_ONLYV2D;
break;
}
default: /* for spacetype not yet handled */
offsx = 0;
offsy = 0;
sizex = region->winx;
sizey = region->winy;
dflag |= GP_DRAWDATA_ONLYI2D;
break;
}
if (ED_screen_animation_playing(wm)) {
/* Don't show onion-skins during animation playback/scrub (i.e. it obscures the poses)
* OpenGL Renders (i.e. final output), or depth buffer (i.e. not real strokes). */
dflag |= GP_DRAWDATA_NO_ONIONS;
}
/* draw it! */
annotation_draw_data_all(scene, gpd, offsx, offsy, sizex, sizey, CFRA, dflag, area->spacetype);
}
/**
* Draw grease-pencil sketches to specified 2d-view
* assuming that matrices are already set correctly.
*
* \note This gets called twice - first time with onlyv2d=true to draw 'canvas' strokes,
* second time with onlyv2d=false for screen-aligned strokes.
*/
void ED_annotation_draw_view2d(const bContext *C, bool onlyv2d)
{
wmWindowManager *wm = CTX_wm_manager(C);
ScrArea *area = CTX_wm_area(C);
ARegion *region = CTX_wm_region(C);
Scene *scene = CTX_data_scene(C);
int dflag = 0;
/* check that we have grease-pencil stuff to draw */
if (area == NULL) {
return;
}
bGPdata *gpd = ED_annotation_data_get_active(C);
if (gpd == NULL) {
return;
}
/* special hack for Image Editor */
/* FIXME: the opengl poly-strokes don't draw at right thickness when done this way,
* so disabled. */
if (ELEM(area->spacetype, SPACE_IMAGE, SPACE_CLIP)) {
dflag |= GP_DRAWDATA_IEDITHACK;
}
/* draw it! */
if (onlyv2d) {
dflag |= (GP_DRAWDATA_ONLYV2D | GP_DRAWDATA_NOSTATUS);
}
if (ED_screen_animation_playing(wm)) {
dflag |= GP_DRAWDATA_NO_ONIONS;
}
annotation_draw_data_all(
scene, gpd, 0, 0, region->winx, region->winy, CFRA, dflag, area->spacetype);
}
/* draw annotations sketches to specified 3d-view assuming that matrices are already set
* correctly Note: this gets called twice - first time with only3d=true to draw 3d-strokes,
* second time with only3d=false for screen-aligned strokes */
void ED_annotation_draw_view3d(
Scene *scene, struct Depsgraph *depsgraph, View3D *v3d, ARegion *region, bool only3d)
{
int dflag = 0;
RegionView3D *rv3d = region->regiondata;
int offsx, offsy, winx, winy;
/* check that we have grease-pencil stuff to draw */
/* XXX: Hardcoded reference here may get out of sync if we change how we fetch annotation data
*/
bGPdata *gpd = scene->gpd;
if (gpd == NULL) {
return;
}
/* when rendering to the offscreen buffer we don't want to
* deal with the camera border, otherwise map the coords to the camera border. */
if ((rv3d->persp == RV3D_CAMOB) && !(G.f & G_FLAG_RENDER_VIEWPORT)) {
rctf rectf;
ED_view3d_calc_camera_border(scene, depsgraph, region, v3d, rv3d, &rectf, true); /* no shift */
offsx = round_fl_to_int(rectf.xmin);
offsy = round_fl_to_int(rectf.ymin);
winx = round_fl_to_int(rectf.xmax - rectf.xmin);
winy = round_fl_to_int(rectf.ymax - rectf.ymin);
}
else {
offsx = 0;
offsy = 0;
winx = region->winx;
winy = region->winy;
}
/* set flags */
if (only3d) {
/* 3D strokes/3D space:
* - only 3D space points
* - don't status text either (as it's the wrong space)
*/
dflag |= (GP_DRAWDATA_ONLY3D | GP_DRAWDATA_NOSTATUS);
}
if (v3d->flag2 & V3D_HIDE_OVERLAYS) {
/* don't draw status text when "only render" flag is set */
dflag |= GP_DRAWDATA_NOSTATUS;
}
/* draw it! */
annotation_draw_data_all(scene, gpd, offsx, offsy, winx, winy, CFRA, dflag, v3d->spacetype);
}
void ED_annotation_draw_ex(
Scene *scene, bGPdata *gpd, int winx, int winy, const int cfra, const char spacetype)
{
int dflag = GP_DRAWDATA_NOSTATUS | GP_DRAWDATA_ONLYV2D;
annotation_draw_data_all(scene, gpd, 0, 0, winx, winy, cfra, dflag, spacetype);
}
/* ************************************************** */
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