/* SPDX-License-Identifier: GPL-2.0-or-later * Copyright Blender Foundation. */ /** \file * \ingroup spgraph */ #include #include #include #include #include "BLI_blenlib.h" #include "BLI_math.h" #include "BLI_utildefines.h" #include "DNA_anim_types.h" #include "DNA_screen_types.h" #include "DNA_space_types.h" #include "DNA_userdef_types.h" #include "DNA_windowmanager_types.h" #include "BKE_action.h" #include "BKE_anim_data.h" #include "BKE_context.h" #include "BKE_curve.h" #include "BKE_fcurve.h" #include "BKE_nla.h" #include "GPU_immediate.h" #include "GPU_matrix.h" #include "GPU_state.h" #include "ED_anim_api.h" #include "graph_intern.h" #include "UI_interface.h" #include "UI_resources.h" #include "UI_view2d.h" static void graph_draw_driver_debug(bAnimContext *ac, ID *id, FCurve *fcu); /* -------------------------------------------------------------------- */ /** \name Utility Drawing Defines * \{ */ /* determine the alpha value that should be used when * drawing components for some F-Curve (fcu) * - selected F-Curves should be more visible than partially visible ones */ static float fcurve_display_alpha(FCurve *fcu) { return (fcu->flag & FCURVE_SELECTED) ? 1.0f : U.fcu_inactive_alpha; } /** \} */ /* -------------------------------------------------------------------- */ /** \name FCurve Modifier Drawing * \{ */ /* Envelope -------------- */ /* TODO: draw a shaded poly showing the region of influence too!!! */ /** * \param adt_nla_remap: Send NULL if no NLA remapping necessary. */ static void draw_fcurve_modifier_controls_envelope(FModifier *fcm, View2D *v2d, AnimData *adt_nla_remap) { FMod_Envelope *env = (FMod_Envelope *)fcm->data; FCM_EnvelopeData *fed; const float fac = 0.05f * BLI_rctf_size_x(&v2d->cur); int i; const uint shdr_pos = GPU_vertformat_attr_add( immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); GPU_line_width(1.0f); immBindBuiltinProgram(GPU_SHADER_3D_LINE_DASHED_UNIFORM_COLOR); float viewport_size[4]; GPU_viewport_size_get_f(viewport_size); immUniform2f("viewport_size", viewport_size[2] / UI_DPI_FAC, viewport_size[3] / UI_DPI_FAC); immUniform1i("colors_len", 0); /* Simple dashes. */ immUniformColor3f(0.0f, 0.0f, 0.0f); immUniform1f("dash_width", 10.0f); immUniform1f("dash_factor", 0.5f); /* draw two black lines showing the standard reference levels */ immBegin(GPU_PRIM_LINES, 4); immVertex2f(shdr_pos, v2d->cur.xmin, env->midval + env->min); immVertex2f(shdr_pos, v2d->cur.xmax, env->midval + env->min); immVertex2f(shdr_pos, v2d->cur.xmin, env->midval + env->max); immVertex2f(shdr_pos, v2d->cur.xmax, env->midval + env->max); immEnd(); immUnbindProgram(); if (env->totvert > 0) { /* set size of vertices (non-adjustable for now) */ GPU_point_size(2.0f); immBindBuiltinProgram(GPU_SHADER_3D_UNIFORM_COLOR); /* for now, point color is fixed, and is white */ immUniformColor3f(1.0f, 1.0f, 1.0f); immBeginAtMost(GPU_PRIM_POINTS, env->totvert * 2); for (i = 0, fed = env->data; i < env->totvert; i++, fed++) { const float env_scene_time = BKE_nla_tweakedit_remap( adt_nla_remap, fed->time, NLATIME_CONVERT_MAP); /* only draw if visible * - min/max here are fixed, not relative */ if (IN_RANGE(env_scene_time, (v2d->cur.xmin - fac), (v2d->cur.xmax + fac))) { immVertex2f(shdr_pos, env_scene_time, fed->min); immVertex2f(shdr_pos, env_scene_time, fed->max); } } immEnd(); immUnbindProgram(); } } /** \} */ /* -------------------------------------------------------------------- */ /** \name FCurve Modifier Drawing * \{ */ /* Points ---------------- */ /* helper func - set color to draw F-Curve data with */ static void set_fcurve_vertex_color(FCurve *fcu, bool sel) { float color[4]; float diff; /* Set color of curve vertex based on state of curve (i.e. 'Edit' Mode) */ if ((fcu->flag & FCURVE_PROTECTED) == 0) { /* Curve's points ARE BEING edited */ UI_GetThemeColor3fv(sel ? TH_VERTEX_SELECT : TH_VERTEX, color); } else { /* Curve's points CANNOT BE edited */ UI_GetThemeColor3fv(sel ? TH_TEXT_HI : TH_TEXT, color); } /* Fade the 'intensity' of the vertices based on the selection of the curves too * - Only fade by 50% the amount the curves were faded by, so that the points * still stand out for easier selection */ diff = 1.0f - fcurve_display_alpha(fcu); color[3] = 1.0f - (diff * 0.5f); CLAMP(color[3], 0.2f, 1.0f); immUniformColor4fv(color); } static void draw_fcurve_selected_keyframe_vertices( FCurve *fcu, View2D *v2d, bool edit, bool sel, uint pos) { const float fac = 0.05f * BLI_rctf_size_x(&v2d->cur); set_fcurve_vertex_color(fcu, sel); immBeginAtMost(GPU_PRIM_POINTS, fcu->totvert); BezTriple *bezt = fcu->bezt; for (int i = 0; i < fcu->totvert; i++, bezt++) { /* As an optimization step, only draw those in view * - We apply a correction factor to ensure that points * don't pop in/out due to slight twitches of view size. */ if (IN_RANGE(bezt->vec[1][0], (v2d->cur.xmin - fac), (v2d->cur.xmax + fac))) { if (edit) { /* 'Keyframe' vertex only, as handle lines and handles have already been drawn * - only draw those with correct selection state for the current drawing color * - */ if ((bezt->f2 & SELECT) == sel) { immVertex2fv(pos, bezt->vec[1]); } } else { /* no check for selection here, as curve is not editable... */ /* XXX perhaps we don't want to even draw points? maybe add an option for that later */ immVertex2fv(pos, bezt->vec[1]); } } } immEnd(); } /** * Draw the extra indicator for the active point. */ static void draw_fcurve_active_vertex(const FCurve *fcu, const View2D *v2d, const uint pos) { const int active_keyframe_index = BKE_fcurve_active_keyframe_index(fcu); if (!(fcu->flag & FCURVE_ACTIVE) || active_keyframe_index == FCURVE_ACTIVE_KEYFRAME_NONE) { return; } const float fac = 0.05f * BLI_rctf_size_x(&v2d->cur); const BezTriple *bezt = &fcu->bezt[active_keyframe_index]; if (!IN_RANGE(bezt->vec[1][0], (v2d->cur.xmin - fac), (v2d->cur.xmax + fac))) { return; } if (!(bezt->f2 & SELECT)) { return; } immBegin(GPU_PRIM_POINTS, 1); immUniformThemeColor(TH_VERTEX_ACTIVE); immVertex2fv(pos, bezt->vec[1]); immEnd(); } /* helper func - draw keyframe vertices only for an F-Curve */ static void draw_fcurve_keyframe_vertices(FCurve *fcu, View2D *v2d, bool edit, uint pos) { immBindBuiltinProgram(GPU_SHADER_2D_POINT_UNIFORM_SIZE_UNIFORM_COLOR_AA); immUniform1f("size", UI_GetThemeValuef(TH_VERTEX_SIZE) * U.dpi_fac); draw_fcurve_selected_keyframe_vertices(fcu, v2d, edit, false, pos); draw_fcurve_selected_keyframe_vertices(fcu, v2d, edit, true, pos); draw_fcurve_active_vertex(fcu, v2d, pos); immUnbindProgram(); } /* helper func - draw handle vertices only for an F-Curve (if it is not protected) */ static void draw_fcurve_selected_handle_vertices( FCurve *fcu, View2D *v2d, bool sel, bool sel_handle_only, uint pos) { (void)v2d; /* TODO: use this to draw only points in view */ /* set handle color */ float hcolor[3]; UI_GetThemeColor3fv(sel ? TH_HANDLE_VERTEX_SELECT : TH_HANDLE_VERTEX, hcolor); immUniform4f("outlineColor", hcolor[0], hcolor[1], hcolor[2], 1.0f); immUniformColor3fvAlpha(hcolor, 0.01f); /* almost invisible - only keep for smoothness */ immBeginAtMost(GPU_PRIM_POINTS, fcu->totvert * 2); BezTriple *bezt = fcu->bezt; BezTriple *prevbezt = NULL; for (int i = 0; i < fcu->totvert; i++, prevbezt = bezt, bezt++) { /* Draw the editmode handles for a bezier curve (others don't have handles) * if their selection status matches the selection status we're drawing for * - first handle only if previous beztriple was bezier-mode * - second handle only if current beztriple is bezier-mode * * Also, need to take into account whether the keyframe was selected * if a Graph Editor option to only show handles of selected keys is on. */ if (!sel_handle_only || BEZT_ISSEL_ANY(bezt)) { if ((!prevbezt && (bezt->ipo == BEZT_IPO_BEZ)) || (prevbezt && (prevbezt->ipo == BEZT_IPO_BEZ))) { if ((bezt->f1 & SELECT) == sel /* && v2d->cur.xmin < bezt->vec[0][0] < v2d->cur.xmax) */) { immVertex2fv(pos, bezt->vec[0]); } } if (bezt->ipo == BEZT_IPO_BEZ) { if ((bezt->f3 & SELECT) == sel /* && v2d->cur.xmin < bezt->vec[2][0] < v2d->cur.xmax) */) { immVertex2fv(pos, bezt->vec[2]); } } } } immEnd(); } /** * Draw the extra handles for the active point. */ static void draw_fcurve_active_handle_vertices(const FCurve *fcu, const bool sel_handle_only, const uint pos) { const int active_keyframe_index = BKE_fcurve_active_keyframe_index(fcu); if (!(fcu->flag & FCURVE_ACTIVE) || active_keyframe_index == FCURVE_ACTIVE_KEYFRAME_NONE) { return; } const BezTriple *bezt = &fcu->bezt[active_keyframe_index]; if (sel_handle_only && !BEZT_ISSEL_ANY(bezt)) { return; } float active_col[4]; UI_GetThemeColor4fv(TH_VERTEX_ACTIVE, active_col); immUniform4fv("outlineColor", active_col); immUniformColor3fvAlpha(active_col, 0.01f); /* Almost invisible - only keep for smoothness. */ immBeginAtMost(GPU_PRIM_POINTS, 2); const BezTriple *left_bezt = active_keyframe_index > 0 ? &fcu->bezt[active_keyframe_index - 1] : bezt; if (left_bezt->ipo == BEZT_IPO_BEZ && (bezt->f1 & SELECT)) { immVertex2fv(pos, bezt->vec[0]); } if (bezt->ipo == BEZT_IPO_BEZ && (bezt->f3 & SELECT)) { immVertex2fv(pos, bezt->vec[2]); } immEnd(); } /* helper func - draw handle vertices only for an F-Curve (if it is not protected) */ static void draw_fcurve_handle_vertices(FCurve *fcu, View2D *v2d, bool sel_handle_only, uint pos) { /* smooth outlines for more consistent appearance */ immBindBuiltinProgram(GPU_SHADER_2D_POINT_UNIFORM_SIZE_UNIFORM_COLOR_OUTLINE_AA); /* set handle size */ immUniform1f("size", (1.4f * UI_GetThemeValuef(TH_HANDLE_VERTEX_SIZE)) * U.dpi_fac); immUniform1f("outlineWidth", 1.5f * U.dpi_fac); draw_fcurve_selected_handle_vertices(fcu, v2d, false, sel_handle_only, pos); draw_fcurve_selected_handle_vertices(fcu, v2d, true, sel_handle_only, pos); draw_fcurve_active_handle_vertices(fcu, sel_handle_only, pos); immUnbindProgram(); } static void draw_fcurve_vertices(ARegion *region, FCurve *fcu, bool do_handles, bool sel_handle_only) { View2D *v2d = ®ion->v2d; /* only draw points if curve is visible * - Draw unselected points before selected points as separate passes * to make sure in the case of overlapping points that the selected is always visible * - Draw handles before keyframes, so that keyframes will overlap handles * (keyframes are more important for users). */ uint pos = GPU_vertformat_attr_add(immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); GPU_blend(GPU_BLEND_ALPHA); GPU_program_point_size(true); /* draw the two handles first (if they're shown, the curve doesn't * have just a single keyframe, and the curve is being edited) */ if (do_handles) { draw_fcurve_handle_vertices(fcu, v2d, sel_handle_only, pos); } /* draw keyframes over the handles */ draw_fcurve_keyframe_vertices(fcu, v2d, !(fcu->flag & FCURVE_PROTECTED), pos); GPU_program_point_size(false); GPU_blend(GPU_BLEND_NONE); } /* Handles ---------------- */ static bool draw_fcurve_handles_check(SpaceGraph *sipo, FCurve *fcu) { /* don't draw handle lines if handles are not to be shown */ if ( /* handles shouldn't be shown anywhere */ (sipo->flag & SIPO_NOHANDLES) || /* keyframes aren't editable */ (fcu->flag & FCURVE_PROTECTED) || #if 0 /* handles can still be selected and handle types set, better draw - campbell */ /* editing the handles here will cause weird/incorrect interpolation issues */ (fcu->flag & FCURVE_INT_VALUES) || #endif /* group that curve belongs to is not editable */ ((fcu->grp) && (fcu->grp->flag & AGRP_PROTECTED)) || /* Do not show handles if there is only 1 keyframe, * otherwise they all clump together in an ugly ball. */ (fcu->totvert <= 1)) { return false; } return true; } /* draw lines for F-Curve handles only (this is only done in EditMode) * NOTE: draw_fcurve_handles_check must be checked before running this. */ static void draw_fcurve_handles(SpaceGraph *sipo, FCurve *fcu) { int sel, b; GPUVertFormat *format = immVertexFormat(); uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); uint color = GPU_vertformat_attr_add( format, "color", GPU_COMP_U8, 4, GPU_FETCH_INT_TO_FLOAT_UNIT); immBindBuiltinProgram(GPU_SHADER_3D_FLAT_COLOR); if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) { GPU_line_smooth(true); } GPU_blend(GPU_BLEND_ALPHA); immBeginAtMost(GPU_PRIM_LINES, 4 * 2 * fcu->totvert); /* slightly hacky, but we want to draw unselected points before selected ones * so that selected points are clearly visible */ for (sel = 0; sel < 2; sel++) { BezTriple *bezt = fcu->bezt, *prevbezt = NULL; int basecol = (sel) ? TH_HANDLE_SEL_FREE : TH_HANDLE_FREE; uchar col[4]; for (b = 0; b < fcu->totvert; b++, prevbezt = bezt, bezt++) { /* if only selected keyframes can get their handles shown, * check that keyframe is selected */ if (sipo->flag & SIPO_SELVHANDLESONLY) { if (BEZT_ISSEL_ANY(bezt) == 0) { continue; } } /* draw handle with appropriate set of colors if selection is ok */ if ((bezt->f2 & SELECT) == sel) { /* only draw first handle if previous segment had handles */ if ((!prevbezt && (bezt->ipo == BEZT_IPO_BEZ)) || (prevbezt && (prevbezt->ipo == BEZT_IPO_BEZ))) { UI_GetThemeColor3ubv(basecol + bezt->h1, col); col[3] = fcurve_display_alpha(fcu) * 255; immAttr4ubv(color, col); immVertex2fv(pos, bezt->vec[0]); immAttr4ubv(color, col); immVertex2fv(pos, bezt->vec[1]); } /* only draw second handle if this segment is bezier */ if (bezt->ipo == BEZT_IPO_BEZ) { UI_GetThemeColor3ubv(basecol + bezt->h2, col); col[3] = fcurve_display_alpha(fcu) * 255; immAttr4ubv(color, col); immVertex2fv(pos, bezt->vec[1]); immAttr4ubv(color, col); immVertex2fv(pos, bezt->vec[2]); } } else { /* only draw first handle if previous segment was had handles, and selection is ok */ if (((bezt->f1 & SELECT) == sel) && ((!prevbezt && (bezt->ipo == BEZT_IPO_BEZ)) || (prevbezt && (prevbezt->ipo == BEZT_IPO_BEZ)))) { UI_GetThemeColor3ubv(basecol + bezt->h1, col); col[3] = fcurve_display_alpha(fcu) * 255; immAttr4ubv(color, col); immVertex2fv(pos, bezt->vec[0]); immAttr4ubv(color, col); immVertex2fv(pos, bezt->vec[1]); } /* only draw second handle if this segment is bezier, and selection is ok */ if (((bezt->f3 & SELECT) == sel) && (bezt->ipo == BEZT_IPO_BEZ)) { UI_GetThemeColor3ubv(basecol + bezt->h2, col); col[3] = fcurve_display_alpha(fcu) * 255; immAttr4ubv(color, col); immVertex2fv(pos, bezt->vec[0]); immAttr4ubv(color, col); immVertex2fv(pos, bezt->vec[1]); } } } } immEnd(); immUnbindProgram(); GPU_blend(GPU_BLEND_NONE); if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) { GPU_line_smooth(false); } } /* Samples ---------------- */ /* helper func - draw sample-range marker for an F-Curve as a cross * NOTE: the caller MUST HAVE GL_LINE_SMOOTH & GL_BLEND ENABLED, otherwise, the controls don't * have a consistent appearance (due to off-pixel alignments)... */ static void draw_fcurve_sample_control( float x, float y, float xscale, float yscale, float hsize, uint pos) { /* adjust view transform before starting */ GPU_matrix_push(); GPU_matrix_translate_2f(x, y); GPU_matrix_scale_2f(1.0f / xscale * hsize, 1.0f / yscale * hsize); /* draw X shape */ immBegin(GPU_PRIM_LINES, 4); immVertex2f(pos, -0.7f, -0.7f); immVertex2f(pos, +0.7f, +0.7f); immVertex2f(pos, -0.7f, +0.7f); immVertex2f(pos, +0.7f, -0.7f); immEnd(); /* restore view transform */ GPU_matrix_pop(); } /* helper func - draw keyframe vertices only for an F-Curve */ static void draw_fcurve_samples(SpaceGraph *sipo, ARegion *region, FCurve *fcu) { FPoint *first, *last; float hsize, xscale, yscale; /* get view settings */ hsize = UI_GetThemeValuef(TH_VERTEX_SIZE); UI_view2d_scale_get(®ion->v2d, &xscale, &yscale); /* get verts */ first = fcu->fpt; last = (first) ? (first + (fcu->totvert - 1)) : (NULL); /* draw */ if (first && last) { /* anti-aliased lines for more consistent appearance */ if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) { GPU_line_smooth(true); } GPU_blend(GPU_BLEND_ALPHA); uint pos = GPU_vertformat_attr_add(immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); immBindBuiltinProgram(GPU_SHADER_3D_UNIFORM_COLOR); immUniformThemeColor((fcu->flag & FCURVE_SELECTED) ? TH_TEXT_HI : TH_TEXT); draw_fcurve_sample_control(first->vec[0], first->vec[1], xscale, yscale, hsize, pos); draw_fcurve_sample_control(last->vec[0], last->vec[1], xscale, yscale, hsize, pos); immUnbindProgram(); GPU_blend(GPU_BLEND_NONE); if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) { GPU_line_smooth(false); } } } /* Curve ---------------- */ /* Helper func - just draw the F-Curve by sampling the visible region * (for drawing curves with modifiers). */ static void draw_fcurve_curve(bAnimContext *ac, ID *id, FCurve *fcu_, View2D *v2d, uint pos, const bool use_nla_remap, const bool draw_extrapolation) { SpaceGraph *sipo = (SpaceGraph *)ac->sl; short mapping_flag = ANIM_get_normalization_flags(ac); /* when opening a blend file on a different sized screen or while dragging the toolbar this can * happen best just bail out in this case. */ if (UI_view2d_scale_get_x(v2d) <= 0.0f) { return; } /* disable any drivers */ FCurve fcurve_for_draw = *fcu_; fcurve_for_draw.driver = NULL; /* compute unit correction factor */ float offset; float unitFac = ANIM_unit_mapping_get_factor( ac->scene, id, &fcurve_for_draw, mapping_flag, &offset); /* Note about sampling frequency: * Ideally, this is chosen such that we have 1-2 pixels = 1 segment * which means that our curves can be as smooth as possible. However, * this does mean that curves may not be fully accurate (i.e. if they have * sudden spikes which happen at the sampling point, we may have problems). * Also, this may introduce lower performance on less densely detailed curves, * though it is impossible to predict this from the modifiers! * * If the automatically determined sampling frequency is likely to cause an infinite * loop (i.e. too close to 0), then clamp it to a determined "safe" value. The value * chosen here is just the coarsest value which still looks reasonable... */ /* TODO: perhaps we should have 1.0 frames * as upper limit so that curves don't get too distorted? */ float pixels_per_sample = 1.5f; float samplefreq = pixels_per_sample / UI_view2d_scale_get_x(v2d); if (sipo->flag & SIPO_BEAUTYDRAW_OFF) { /* Low Precision = coarse lower-bound clamping * * Although the "Beauty Draw" flag was originally for AA'd * line drawing, the sampling rate here has a much greater * impact on performance (e.g. for T40372)! * * This one still amounts to 10 sample-frames for each 1-frame interval * which should be quite a decent approximation in many situations. */ if (samplefreq < 0.1f) { samplefreq = 0.1f; } } else { /* "Higher Precision" but slower - especially on larger windows (e.g. T40372) */ if (samplefreq < 0.00001f) { samplefreq = 0.00001f; } } /* the start/end times are simply the horizontal extents of the 'cur' rect */ float stime = v2d->cur.xmin; float etime = v2d->cur.xmax; AnimData *adt = use_nla_remap ? BKE_animdata_from_id(id) : NULL; /* If not drawing extrapolation, then change fcurve drawing bounds to its keyframe bounds clamped * by graph editor bounds. */ if (!draw_extrapolation) { float fcu_start = 0; float fcu_end = 0; BKE_fcurve_calc_range(fcu_, &fcu_start, &fcu_end, false, false); fcu_start = BKE_nla_tweakedit_remap(adt, fcu_start, NLATIME_CONVERT_MAP); fcu_end = BKE_nla_tweakedit_remap(adt, fcu_end, NLATIME_CONVERT_MAP); /* Account for reversed NLA strip effect. */ if (fcu_end < fcu_start) { SWAP(float, fcu_start, fcu_end); } /* Clamp to graph editor rendering bounds. */ stime = max_ff(stime, fcu_start); etime = min_ff(etime, fcu_end); } const int total_samples = roundf((etime - stime) / samplefreq); if (total_samples <= 0) { return; } /* NLA remapping is linear so we don't have to remap per iteration. */ const float eval_start = BKE_nla_tweakedit_remap(adt, stime, NLATIME_CONVERT_UNMAP); const float eval_freq = BKE_nla_tweakedit_remap(adt, stime + samplefreq, NLATIME_CONVERT_UNMAP) - eval_start; const float eval_end = BKE_nla_tweakedit_remap(adt, etime, NLATIME_CONVERT_UNMAP); immBegin(GPU_PRIM_LINE_STRIP, (total_samples + 1)); /* At each sampling interval, add a new vertex. * * Apply the unit correction factor to the calculated values so that the displayed values appear * correctly in the viewport. */ for (int i = 0; i < total_samples; i++) { const float ctime = stime + i * samplefreq; float eval_time = eval_start + i * eval_freq; /* Prevent drawing past bounds, due to floating point problems. * User-wise, prevent visual flickering. * * This is to cover the case where: * eval_start + total_samples * eval_freq > eval_end * due to floating point problems. */ if (eval_time > eval_end) { eval_time = eval_end; } immVertex2f(pos, ctime, (evaluate_fcurve(&fcurve_for_draw, eval_time) + offset) * unitFac); } /* Ensure we include end boundary point. * User-wise, prevent visual flickering. * * This is to cover the case where: * eval_start + total_samples * eval_freq < eval_end * due to floating point problems. */ immVertex2f(pos, etime, (evaluate_fcurve(&fcurve_for_draw, eval_end) + offset) * unitFac); immEnd(); } /* helper func - draw a samples-based F-Curve */ static void draw_fcurve_curve_samples(bAnimContext *ac, ID *id, FCurve *fcu, View2D *v2d, const uint shdr_pos, const bool draw_extrapolation) { if (!draw_extrapolation && fcu->totvert == 1) { return; } FPoint *prevfpt = fcu->fpt; FPoint *fpt = prevfpt + 1; float fac, v[2]; int b = fcu->totvert; float unit_scale, offset; short mapping_flag = ANIM_get_normalization_flags(ac); int count = fcu->totvert; const bool extrap_left = draw_extrapolation && prevfpt->vec[0] > v2d->cur.xmin; if (extrap_left) { count++; } const bool extrap_right = draw_extrapolation && (prevfpt + b - 1)->vec[0] < v2d->cur.xmax; if (extrap_right) { count++; } /* apply unit mapping */ GPU_matrix_push(); unit_scale = ANIM_unit_mapping_get_factor(ac->scene, id, fcu, mapping_flag, &offset); GPU_matrix_scale_2f(1.0f, unit_scale); GPU_matrix_translate_2f(0.0f, offset); immBegin(GPU_PRIM_LINE_STRIP, count); /* extrapolate to left? - left-side of view comes before first keyframe? */ if (extrap_left) { v[0] = v2d->cur.xmin; /* y-value depends on the interpolation */ if ((fcu->extend == FCURVE_EXTRAPOLATE_CONSTANT) || (fcu->flag & FCURVE_INT_VALUES) || (fcu->totvert == 1)) { /* just extend across the first keyframe's value */ v[1] = prevfpt->vec[1]; } else { /* extrapolate linear doesn't use the handle, use the next points center instead */ fac = (prevfpt->vec[0] - fpt->vec[0]) / (prevfpt->vec[0] - v[0]); if (fac) { fac = 1.0f / fac; } v[1] = prevfpt->vec[1] - fac * (prevfpt->vec[1] - fpt->vec[1]); } immVertex2fv(shdr_pos, v); } /* loop over samples, drawing segments */ /* draw curve between first and last keyframe (if there are enough to do so) */ while (b--) { /* Linear interpolation: just add one point (which should add a new line segment) */ immVertex2fv(shdr_pos, prevfpt->vec); /* get next pointers */ if (b > 0) { prevfpt++; } } /* extrapolate to right? (see code for left-extrapolation above too) */ if (extrap_right) { v[0] = v2d->cur.xmax; /* y-value depends on the interpolation */ if ((fcu->extend == FCURVE_EXTRAPOLATE_CONSTANT) || (fcu->flag & FCURVE_INT_VALUES) || (fcu->totvert == 1)) { /* based on last keyframe's value */ v[1] = prevfpt->vec[1]; } else { /* extrapolate linear doesn't use the handle, use the previous points center instead */ fpt = prevfpt - 1; fac = (prevfpt->vec[0] - fpt->vec[0]) / (prevfpt->vec[0] - v[0]); if (fac) { fac = 1.0f / fac; } v[1] = prevfpt->vec[1] - fac * (prevfpt->vec[1] - fpt->vec[1]); } immVertex2fv(shdr_pos, v); } immEnd(); GPU_matrix_pop(); } /* helper func - check if the F-Curve only contains easily drawable segments * (i.e. no easing equation interpolations) */ static bool fcurve_can_use_simple_bezt_drawing(FCurve *fcu) { BezTriple *bezt; int i; for (i = 0, bezt = fcu->bezt; i < fcu->totvert; i++, bezt++) { if (ELEM(bezt->ipo, BEZT_IPO_CONST, BEZT_IPO_LIN, BEZT_IPO_BEZ) == false) { return false; } } return true; } /* helper func - draw one repeat of an F-Curve (using Bezier curve approximations) */ static void draw_fcurve_curve_bezts( bAnimContext *ac, ID *id, FCurve *fcu, View2D *v2d, uint pos, const bool draw_extrapolation) { if (!draw_extrapolation && fcu->totvert == 1) { return; } BezTriple *prevbezt = fcu->bezt; BezTriple *bezt = prevbezt + 1; float v1[2], v2[2], v3[2], v4[2]; float *fp, data[120]; float fac = 0.0f; int b = fcu->totvert - 1; int resol; float unit_scale, offset; short mapping_flag = ANIM_get_normalization_flags(ac); /* apply unit mapping */ GPU_matrix_push(); unit_scale = ANIM_unit_mapping_get_factor(ac->scene, id, fcu, mapping_flag, &offset); GPU_matrix_scale_2f(1.0f, unit_scale); GPU_matrix_translate_2f(0.0f, offset); /* For now, this assumes the worst case scenario, where all the keyframes have * bezier interpolation, and are drawn at full res. * This is tricky to optimize, but maybe can be improved at some point... */ immBeginAtMost(GPU_PRIM_LINE_STRIP, (b * 32 + 3)); /* extrapolate to left? */ if (draw_extrapolation && prevbezt->vec[1][0] > v2d->cur.xmin) { /* left-side of view comes before first keyframe, so need to extend as not cyclic */ v1[0] = v2d->cur.xmin; /* y-value depends on the interpolation */ if ((fcu->extend == FCURVE_EXTRAPOLATE_CONSTANT) || (prevbezt->ipo == BEZT_IPO_CONST) || (fcu->totvert == 1)) { /* just extend across the first keyframe's value */ v1[1] = prevbezt->vec[1][1]; } else if (prevbezt->ipo == BEZT_IPO_LIN) { /* extrapolate linear doesn't use the handle, use the next points center instead */ fac = (prevbezt->vec[1][0] - bezt->vec[1][0]) / (prevbezt->vec[1][0] - v1[0]); if (fac) { fac = 1.0f / fac; } v1[1] = prevbezt->vec[1][1] - fac * (prevbezt->vec[1][1] - bezt->vec[1][1]); } else { /* based on angle of handle 1 (relative to keyframe) */ fac = (prevbezt->vec[0][0] - prevbezt->vec[1][0]) / (prevbezt->vec[1][0] - v1[0]); if (fac) { fac = 1.0f / fac; } v1[1] = prevbezt->vec[1][1] - fac * (prevbezt->vec[0][1] - prevbezt->vec[1][1]); } immVertex2fv(pos, v1); } /* if only one keyframe, add it now */ if (fcu->totvert == 1) { v1[0] = prevbezt->vec[1][0]; v1[1] = prevbezt->vec[1][1]; immVertex2fv(pos, v1); } /* draw curve between first and last keyframe (if there are enough to do so) */ /* TODO: optimize this to not have to calc stuff out of view too? */ while (b--) { if (prevbezt->ipo == BEZT_IPO_CONST) { /* Constant-Interpolation: draw segment between previous keyframe and next, * but holding same value */ v1[0] = prevbezt->vec[1][0]; v1[1] = prevbezt->vec[1][1]; immVertex2fv(pos, v1); v1[0] = bezt->vec[1][0]; v1[1] = prevbezt->vec[1][1]; immVertex2fv(pos, v1); } else if (prevbezt->ipo == BEZT_IPO_LIN) { /* Linear interpolation: just add one point (which should add a new line segment) */ v1[0] = prevbezt->vec[1][0]; v1[1] = prevbezt->vec[1][1]; immVertex2fv(pos, v1); } else if (prevbezt->ipo == BEZT_IPO_BEZ) { /* Bezier-Interpolation: draw curve as series of segments between keyframes * - resol determines number of points to sample in between keyframes */ /* resol depends on distance between points * (not just horizontal) OR is a fixed high res */ /* TODO: view scale should factor into this someday too... */ if (fcu->driver) { resol = 32; } else { resol = (int)(5.0f * len_v2v2(bezt->vec[1], prevbezt->vec[1])); } if (resol < 2) { /* only draw one */ v1[0] = prevbezt->vec[1][0]; v1[1] = prevbezt->vec[1][1]; immVertex2fv(pos, v1); } else { /* clamp resolution to max of 32 */ /* NOTE: higher values will crash */ if (resol > 32) { resol = 32; } v1[0] = prevbezt->vec[1][0]; v1[1] = prevbezt->vec[1][1]; v2[0] = prevbezt->vec[2][0]; v2[1] = prevbezt->vec[2][1]; v3[0] = bezt->vec[0][0]; v3[1] = bezt->vec[0][1]; v4[0] = bezt->vec[1][0]; v4[1] = bezt->vec[1][1]; BKE_fcurve_correct_bezpart(v1, v2, v3, v4); BKE_curve_forward_diff_bezier(v1[0], v2[0], v3[0], v4[0], data, resol, sizeof(float[3])); BKE_curve_forward_diff_bezier( v1[1], v2[1], v3[1], v4[1], data + 1, resol, sizeof(float[3])); for (fp = data; resol; resol--, fp += 3) { immVertex2fv(pos, fp); } } } /* get next pointers */ prevbezt = bezt; bezt++; /* last point? */ if (b == 0) { v1[0] = prevbezt->vec[1][0]; v1[1] = prevbezt->vec[1][1]; immVertex2fv(pos, v1); } } /* extrapolate to right? (see code for left-extrapolation above too) */ if (draw_extrapolation && prevbezt->vec[1][0] < v2d->cur.xmax) { v1[0] = v2d->cur.xmax; /* y-value depends on the interpolation */ if ((fcu->extend == FCURVE_EXTRAPOLATE_CONSTANT) || (fcu->flag & FCURVE_INT_VALUES) || (prevbezt->ipo == BEZT_IPO_CONST) || (fcu->totvert == 1)) { /* based on last keyframe's value */ v1[1] = prevbezt->vec[1][1]; } else if (prevbezt->ipo == BEZT_IPO_LIN) { /* extrapolate linear doesn't use the handle, use the previous points center instead */ bezt = prevbezt - 1; fac = (prevbezt->vec[1][0] - bezt->vec[1][0]) / (prevbezt->vec[1][0] - v1[0]); if (fac) { fac = 1.0f / fac; } v1[1] = prevbezt->vec[1][1] - fac * (prevbezt->vec[1][1] - bezt->vec[1][1]); } else { /* based on angle of handle 1 (relative to keyframe) */ fac = (prevbezt->vec[2][0] - prevbezt->vec[1][0]) / (prevbezt->vec[1][0] - v1[0]); if (fac) { fac = 1.0f / fac; } v1[1] = prevbezt->vec[1][1] - fac * (prevbezt->vec[2][1] - prevbezt->vec[1][1]); } immVertex2fv(pos, v1); } immEnd(); GPU_matrix_pop(); } static void draw_fcurve(bAnimContext *ac, SpaceGraph *sipo, ARegion *region, bAnimListElem *ale) { FCurve *fcu = (FCurve *)ale->key_data; FModifier *fcm = find_active_fmodifier(&fcu->modifiers); AnimData *adt = ANIM_nla_mapping_get(ac, ale); /* map keyframes for drawing if scaled F-Curve */ if (adt) { ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 0, 0); } /* draw curve: * - curve line may be result of one or more destructive modifiers or just the raw data, * so we need to check which method should be used * - controls from active modifier take precedence over keyframes * (XXX! editing tools need to take this into account!) */ /* 1) draw curve line */ if (((fcu->modifiers.first) || (fcu->flag & FCURVE_INT_VALUES)) || (((fcu->bezt) || (fcu->fpt)) && (fcu->totvert))) { /* set color/drawing style for curve itself */ /* draw active F-Curve thicker than the rest to make it stand out */ if (fcu->flag & FCURVE_ACTIVE) { GPU_line_width(2.5); } else { GPU_line_width(1.0); } /* anti-aliased lines for less jagged appearance */ if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) { GPU_line_smooth(true); } GPU_blend(GPU_BLEND_ALPHA); const uint shdr_pos = GPU_vertformat_attr_add( immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); float viewport_size[4]; GPU_viewport_size_get_f(viewport_size); if (BKE_fcurve_is_protected(fcu)) { /* Protected curves (non editable) are drawn with dotted lines. */ immBindBuiltinProgram(GPU_SHADER_3D_LINE_DASHED_UNIFORM_COLOR); immUniform2f("viewport_size", viewport_size[2] / UI_DPI_FAC, viewport_size[3] / UI_DPI_FAC); immUniform1i("colors_len", 0); /* Simple dashes. */ immUniform1f("dash_width", 4.0f); immUniform1f("dash_factor", 0.5f); } else { immBindBuiltinProgram(GPU_SHADER_3D_POLYLINE_UNIFORM_COLOR); immUniform2fv("viewportSize", &viewport_size[2]); immUniform1f("lineWidth", GPU_line_width_get()); } if (((fcu->grp) && (fcu->grp->flag & AGRP_MUTED)) || (fcu->flag & FCURVE_MUTED)) { /* muted curves are drawn in a grayish hue */ /* XXX should we have some variations? */ immUniformThemeColorShade(TH_HEADER, 50); } else { /* set whatever color the curve has set * - unselected curves draw less opaque to help distinguish the selected ones */ immUniformColor3fvAlpha(fcu->color, fcurve_display_alpha(fcu)); } const bool draw_extrapolation = (sipo->flag & SIPO_NO_DRAW_EXTRAPOLATION) == 0; /* draw F-Curve */ if ((fcu->modifiers.first) || (fcu->flag & FCURVE_INT_VALUES)) { /* draw a curve affected by modifiers or only allowed to have integer values * by sampling it at various small-intervals over the visible region */ if (adt) { /** We have to do this mapping dance since the keyframes were remapped but the Fmodifier * evaluations are not. * * So we undo the keyframe remapping and instead remap the evaluation time when drawing the * curve itself. Afterward, we go back and redo the keyframe remapping so the controls are * drawn properly. */ ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, true, false); draw_fcurve_curve(ac, ale->id, fcu, ®ion->v2d, shdr_pos, true, draw_extrapolation); ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, false, false); } else { draw_fcurve_curve(ac, ale->id, fcu, ®ion->v2d, shdr_pos, false, draw_extrapolation); } } else if (((fcu->bezt) || (fcu->fpt)) && (fcu->totvert)) { /* just draw curve based on defined data (i.e. no modifiers) */ if (fcu->bezt) { if (fcurve_can_use_simple_bezt_drawing(fcu)) { draw_fcurve_curve_bezts(ac, ale->id, fcu, ®ion->v2d, shdr_pos, draw_extrapolation); } else { draw_fcurve_curve(ac, ale->id, fcu, ®ion->v2d, shdr_pos, false, draw_extrapolation); } } else if (fcu->fpt) { draw_fcurve_curve_samples(ac, ale->id, fcu, ®ion->v2d, shdr_pos, draw_extrapolation); } } immUnbindProgram(); if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) { GPU_line_smooth(false); } GPU_blend(GPU_BLEND_NONE); } /* 2) draw handles and vertices as appropriate based on active * - If the option to only show controls if the F-Curve is selected is enabled, * we must obey this. */ if (!(sipo->flag & SIPO_SELCUVERTSONLY) || (fcu->flag & FCURVE_SELECTED)) { if (!BKE_fcurve_are_keyframes_usable(fcu) && !(fcu->fpt && fcu->totvert)) { /* only draw controls if this is the active modifier */ if ((fcu->flag & FCURVE_ACTIVE) && (fcm)) { switch (fcm->type) { case FMODIFIER_TYPE_ENVELOPE: /* envelope */ draw_fcurve_modifier_controls_envelope(fcm, ®ion->v2d, adt); break; } } } else if (((fcu->bezt) || (fcu->fpt)) && (fcu->totvert)) { short mapping_flag = ANIM_get_normalization_flags(ac); float offset; float unit_scale = ANIM_unit_mapping_get_factor( ac->scene, ale->id, fcu, mapping_flag, &offset); /* apply unit-scaling to all values via OpenGL */ GPU_matrix_push(); GPU_matrix_scale_2f(1.0f, unit_scale); GPU_matrix_translate_2f(0.0f, offset); /* Set this once and for all - * all handles and handle-verts should use the same thickness. */ GPU_line_width(1.0); if (fcu->bezt) { bool do_handles = draw_fcurve_handles_check(sipo, fcu); if (do_handles) { /* only draw handles/vertices on keyframes */ draw_fcurve_handles(sipo, fcu); } draw_fcurve_vertices(region, fcu, do_handles, (sipo->flag & SIPO_SELVHANDLESONLY)); } else { /* samples: only draw two indicators at either end as indicators */ draw_fcurve_samples(sipo, region, fcu); } GPU_matrix_pop(); } } /* 3) draw driver debugging stuff */ if ((ac->datatype == ANIMCONT_DRIVERS) && (fcu->flag & FCURVE_ACTIVE)) { graph_draw_driver_debug(ac, ale->id, fcu); } /* undo mapping of keyframes for drawing if scaled F-Curve */ if (adt) { ANIM_nla_mapping_apply_fcurve(adt, ale->key_data, 1, 0); } } /* Debugging -------------------------------- */ /* Draw indicators which show the value calculated from the driver, * and how this is mapped to the value that comes out of it. This * is handy for helping users better understand how to interpret * the graphs, and also facilitates debugging. */ static void graph_draw_driver_debug(bAnimContext *ac, ID *id, FCurve *fcu) { ChannelDriver *driver = fcu->driver; View2D *v2d = &ac->region->v2d; short mapping_flag = ANIM_get_normalization_flags(ac); float offset; float unitfac = ANIM_unit_mapping_get_factor(ac->scene, id, fcu, mapping_flag, &offset); const uint shdr_pos = GPU_vertformat_attr_add( immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); immBindBuiltinProgram(GPU_SHADER_3D_LINE_DASHED_UNIFORM_COLOR); float viewport_size[4]; GPU_viewport_size_get_f(viewport_size); immUniform2f("viewport_size", viewport_size[2] / UI_DPI_FAC, viewport_size[3] / UI_DPI_FAC); immUniform1i("colors_len", 0); /* Simple dashes. */ /* No curve to modify/visualize the result? * => We still want to show the 1-1 default... */ if ((fcu->totvert == 0) && BLI_listbase_is_empty(&fcu->modifiers)) { float t; /* draw with thin dotted lines in style of what curve would have been */ immUniformColor3fv(fcu->color); immUniform1f("dash_width", 40.0f); immUniform1f("dash_factor", 0.5f); GPU_line_width(2.0f); /* draw 1-1 line, stretching just past the screen limits * NOTE: we need to scale the y-values to be valid for the units */ immBegin(GPU_PRIM_LINES, 2); t = v2d->cur.xmin; immVertex2f(shdr_pos, t, (t + offset) * unitfac); t = v2d->cur.xmax; immVertex2f(shdr_pos, t, (t + offset) * unitfac); immEnd(); } /* draw driver only if actually functional */ if ((driver->flag & DRIVER_FLAG_INVALID) == 0) { /* grab "coordinates" for driver outputs */ float x = driver->curval; float y = fcu->curval * unitfac; /* Only draw indicators if the point is in range. */ if (x >= v2d->cur.xmin) { float co[2]; /* draw dotted lines leading towards this point from both axes ....... */ immUniformColor3f(0.9f, 0.9f, 0.9f); immUniform1f("dash_width", 10.0f); immUniform1f("dash_factor", 0.5f); GPU_line_width(1.0f); immBegin(GPU_PRIM_LINES, (y <= v2d->cur.ymax) ? 4 : 2); /* x-axis lookup */ co[0] = x; if (y <= v2d->cur.ymax) { co[1] = v2d->cur.ymax + 1.0f; immVertex2fv(shdr_pos, co); co[1] = y; immVertex2fv(shdr_pos, co); } /* y-axis lookup */ co[1] = y; co[0] = v2d->cur.xmin - 1.0f; immVertex2fv(shdr_pos, co); co[0] = x; immVertex2fv(shdr_pos, co); immEnd(); immUnbindProgram(); /* GPU_PRIM_POINTS do not survive dashed line geometry shader... */ immBindBuiltinProgram(GPU_SHADER_3D_UNIFORM_COLOR); /* x marks the spot .................................................... */ /* -> outer frame */ immUniformColor3f(0.9f, 0.9f, 0.9f); GPU_point_size(7.0); immBegin(GPU_PRIM_POINTS, 1); immVertex2f(shdr_pos, x, y); immEnd(); /* inner frame */ immUniformColor3f(0.9f, 0.0f, 0.0f); GPU_point_size(3.0); immBegin(GPU_PRIM_POINTS, 1); immVertex2f(shdr_pos, x, y); immEnd(); } } immUnbindProgram(); } /* Public Curve-Drawing API ---------------- */ void graph_draw_ghost_curves(bAnimContext *ac, SpaceGraph *sipo, ARegion *region) { FCurve *fcu; /* draw with thick dotted lines */ GPU_line_width(3.0f); /* anti-aliased lines for less jagged appearance */ if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) { GPU_line_smooth(true); } GPU_blend(GPU_BLEND_ALPHA); const uint shdr_pos = GPU_vertformat_attr_add( immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT); immBindBuiltinProgram(GPU_SHADER_3D_LINE_DASHED_UNIFORM_COLOR); float viewport_size[4]; GPU_viewport_size_get_f(viewport_size); immUniform2f("viewport_size", viewport_size[2] / UI_DPI_FAC, viewport_size[3] / UI_DPI_FAC); immUniform1i("colors_len", 0); /* Simple dashes. */ immUniform1f("dash_width", 20.0f); immUniform1f("dash_factor", 0.5f); const bool draw_extrapolation = (sipo->flag & SIPO_NO_DRAW_EXTRAPOLATION) == 0; /* the ghost curves are simply sampled F-Curves stored in sipo->runtime.ghost_curves */ for (fcu = sipo->runtime.ghost_curves.first; fcu; fcu = fcu->next) { /* set whatever color the curve has set * - this is set by the function which creates these * - draw with a fixed opacity of 2 */ immUniformColor3fvAlpha(fcu->color, 0.5f); /* simply draw the stored samples */ draw_fcurve_curve_samples(ac, NULL, fcu, ®ion->v2d, shdr_pos, draw_extrapolation); } immUnbindProgram(); if ((sipo->flag & SIPO_BEAUTYDRAW_OFF) == 0) { GPU_line_smooth(false); } GPU_blend(GPU_BLEND_NONE); } void graph_draw_curves(bAnimContext *ac, SpaceGraph *sipo, ARegion *region, short sel) { ListBase anim_data = {NULL, NULL}; bAnimListElem *ale; int filter; /* build list of curves to draw */ filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_CURVE_VISIBLE | ANIMFILTER_FCURVESONLY); filter |= ((sel) ? (ANIMFILTER_SEL) : (ANIMFILTER_UNSEL)); ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype); /* for each curve: * draw curve, then handle-lines, and finally vertices in this order so that * the data will be layered correctly */ bAnimListElem *ale_active_fcurve = NULL; for (ale = anim_data.first; ale; ale = ale->next) { const FCurve *fcu = (FCurve *)ale->key_data; if (fcu->flag & FCURVE_ACTIVE) { ale_active_fcurve = ale; continue; } draw_fcurve(ac, sipo, region, ale); } /* Draw the active FCurve last so that it (especially the active keyframe) * shows on top of the other curves. */ if (ale_active_fcurve != NULL) { draw_fcurve(ac, sipo, region, ale_active_fcurve); } /* free list of curves */ ANIM_animdata_freelist(&anim_data); } /** \} */ /* -------------------------------------------------------------------- */ /** \name Channel List * \{ */ void graph_draw_channel_names(bContext *C, bAnimContext *ac, ARegion *region) { ListBase anim_data = {NULL, NULL}; bAnimListElem *ale; int filter; View2D *v2d = ®ion->v2d; float height; size_t items; /* build list of channels to draw */ filter = (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_LIST_VISIBLE | ANIMFILTER_LIST_CHANNELS | ANIMFILTER_FCURVESONLY); items = ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype); /* Update max-extent of channels here (taking into account scrollers): * - this is done to allow the channel list to be scrollable, but must be done here * to avoid regenerating the list again and/or also because channels list is drawn first */ height = ACHANNEL_TOT_HEIGHT(ac, items); v2d->tot.ymin = -height; /* Loop through channels, and set up drawing depending on their type. */ { /* first pass: just the standard GL-drawing for backdrop + text */ size_t channel_index = 0; float ymax = ACHANNEL_FIRST_TOP(ac); for (ale = anim_data.first; ale; ale = ale->next, ymax -= ACHANNEL_STEP(ac), channel_index++) { float ymin = ymax - ACHANNEL_HEIGHT(ac); /* check if visible */ if (IN_RANGE(ymin, v2d->cur.ymin, v2d->cur.ymax) || IN_RANGE(ymax, v2d->cur.ymin, v2d->cur.ymax)) { /* draw all channels using standard channel-drawing API */ ANIM_channel_draw(ac, ale, ymin, ymax, channel_index); } } } { /* second pass: widgets */ uiBlock *block = UI_block_begin(C, region, __func__, UI_EMBOSS); size_t channel_index = 0; float ymax = ACHANNEL_FIRST_TOP(ac); /* set blending again, as may not be set in previous step */ GPU_blend(GPU_BLEND_ALPHA); for (ale = anim_data.first; ale; ale = ale->next, ymax -= ACHANNEL_STEP(ac), channel_index++) { float ymin = ymax - ACHANNEL_HEIGHT(ac); /* check if visible */ if (IN_RANGE(ymin, v2d->cur.ymin, v2d->cur.ymax) || IN_RANGE(ymax, v2d->cur.ymin, v2d->cur.ymax)) { /* draw all channels using standard channel-drawing API */ rctf channel_rect; BLI_rctf_init(&channel_rect, 0, v2d->cur.xmax - V2D_SCROLL_WIDTH, ymin, ymax); ANIM_channel_draw_widgets(C, ac, ale, block, &channel_rect, channel_index); } } UI_block_end(C, block); UI_block_draw(C, block); GPU_blend(GPU_BLEND_NONE); } /* Free temporary channels. */ ANIM_animdata_freelist(&anim_data); } /** \} */