diff options
Diffstat (limited to 'source/blender/nodes/geometry/nodes/node_geo_string_to_curves.cc')
| -rw-r--r-- | source/blender/nodes/geometry/nodes/node_geo_string_to_curves.cc | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/source/blender/nodes/geometry/nodes/node_geo_string_to_curves.cc b/source/blender/nodes/geometry/nodes/node_geo_string_to_curves.cc new file mode 100644 index 00000000000..5e2f03806c3 --- /dev/null +++ b/source/blender/nodes/geometry/nodes/node_geo_string_to_curves.cc @@ -0,0 +1,306 @@ +/* + * 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. + */ + +#include "DNA_curve_types.h" +#include "DNA_vfont_types.h" + +#include "BKE_curve.h" +#include "BKE_font.h" +#include "BKE_spline.hh" + +#include "BLI_hash.h" +#include "BLI_string_utf8.h" +#include "BLI_task.hh" + +#include "UI_interface.h" +#include "UI_resources.h" + +#include "node_geometry_util.hh" + +namespace blender::nodes { + +static void geo_node_string_to_curves_declare(NodeDeclarationBuilder &b) +{ + b.add_input<decl::String>("String"); + b.add_input<decl::Float>("Size").default_value(1.0f).min(0.0f).subtype(PROP_DISTANCE); + b.add_input<decl::Float>("Character Spacing") + .default_value(1.0f) + .min(0.0f) + .subtype(PROP_DISTANCE); + b.add_input<decl::Float>("Word Spacing").default_value(1.0f).min(0.0f).subtype(PROP_DISTANCE); + b.add_input<decl::Float>("Line Spacing").default_value(1.0f).min(0.0f).subtype(PROP_DISTANCE); + b.add_input<decl::Float>("Text Box Width").default_value(0.0f).min(0.0f).subtype(PROP_DISTANCE); + b.add_input<decl::Float>("Text Box Height").default_value(0.0f).min(0.0f).subtype(PROP_DISTANCE); + b.add_output<decl::Geometry>("Curves"); + b.add_output<decl::String>("Remainder"); +} + +static void geo_node_string_to_curves_layout(uiLayout *layout, struct bContext *C, PointerRNA *ptr) +{ + uiLayoutSetPropSep(layout, true); + uiLayoutSetPropDecorate(layout, false); + uiTemplateID(layout, + C, + ptr, + "font", + nullptr, + "FONT_OT_open", + "FONT_OT_unlink", + UI_TEMPLATE_ID_FILTER_ALL, + false, + nullptr); + uiItemR(layout, ptr, "overflow", 0, "", ICON_NONE); + uiItemR(layout, ptr, "align_x", 0, "", ICON_NONE); + uiItemR(layout, ptr, "align_y", 0, "", ICON_NONE); +} + +static void geo_node_string_to_curves_init(bNodeTree *UNUSED(ntree), bNode *node) +{ + NodeGeometryStringToCurves *data = (NodeGeometryStringToCurves *)MEM_callocN( + sizeof(NodeGeometryStringToCurves), __func__); + + data->overflow = GEO_NODE_STRING_TO_CURVES_MODE_OVERFLOW; + data->align_x = GEO_NODE_STRING_TO_CURVES_ALIGN_X_LEFT; + data->align_y = GEO_NODE_STRING_TO_CURVES_ALIGN_Y_TOP_BASELINE; + node->storage = data; + node->id = (ID *)BKE_vfont_builtin_get(); +} + +static void geo_node_string_to_curves_update(bNodeTree *UNUSED(ntree), bNode *node) +{ + const NodeGeometryStringToCurves *storage = (const NodeGeometryStringToCurves *)node->storage; + const GeometryNodeStringToCurvesOverflowMode overflow = (GeometryNodeStringToCurvesOverflowMode) + storage->overflow; + bNodeSocket *socket_remainder = ((bNodeSocket *)node->outputs.first)->next; + nodeSetSocketAvailability(socket_remainder, overflow == GEO_NODE_STRING_TO_CURVES_MODE_TRUNCATE); + + bNodeSocket *height_socket = (bNodeSocket *)node->inputs.last; + bNodeSocket *width_socket = height_socket->prev; + nodeSetSocketAvailability(height_socket, overflow != GEO_NODE_STRING_TO_CURVES_MODE_OVERFLOW); + node_sock_label(width_socket, + overflow == GEO_NODE_STRING_TO_CURVES_MODE_OVERFLOW ? N_("Max Width") : + N_("Text Box Width")); +} + +struct TextLayout { + /* Position of each character. */ + Vector<float2> positions; + + /* The text that fit into the text box, with newline character sequences replaced. */ + std::string text; + + /* The text that didn't fit into the text box in 'Truncate' mode. May be empty. */ + std::string truncated_text; + + /* Font size could be modified if in 'Scale to fit'-mode. */ + float final_font_size; +}; + +static TextLayout get_text_layout(GeoNodeExecParams ¶ms) +{ + TextLayout layout; + layout.text = params.extract_input<std::string>("String"); + if (layout.text.empty()) { + return {}; + } + + const NodeGeometryStringToCurves &storage = + *(const NodeGeometryStringToCurves *)params.node().storage; + const GeometryNodeStringToCurvesOverflowMode overflow = (GeometryNodeStringToCurvesOverflowMode) + storage.overflow; + const GeometryNodeStringToCurvesAlignXMode align_x = (GeometryNodeStringToCurvesAlignXMode) + storage.align_x; + const GeometryNodeStringToCurvesAlignYMode align_y = (GeometryNodeStringToCurvesAlignYMode) + storage.align_y; + + const float font_size = std::max(params.extract_input<float>("Size"), 0.0f); + const float char_spacing = params.extract_input<float>("Character Spacing"); + const float word_spacing = params.extract_input<float>("Word Spacing"); + const float line_spacing = params.extract_input<float>("Line Spacing"); + const float textbox_w = params.extract_input<float>("Text Box Width"); + const float textbox_h = overflow == GEO_NODE_STRING_TO_CURVES_MODE_OVERFLOW ? + 0.0f : + params.extract_input<float>("Text Box Height"); + VFont *vfont = (VFont *)params.node().id; + + Curve cu = {nullptr}; + cu.type = OB_FONT; + /* Set defaults */ + cu.resolu = 12; + cu.smallcaps_scale = 0.75f; + cu.wordspace = 1.0f; + /* Set values from inputs */ + cu.spacemode = align_x; + cu.align_y = align_y; + cu.fsize = font_size; + cu.spacing = char_spacing; + cu.wordspace = word_spacing; + cu.linedist = line_spacing; + cu.vfont = vfont; + cu.overflow = overflow; + cu.tb = (TextBox *)MEM_calloc_arrayN(MAXTEXTBOX, sizeof(TextBox), __func__); + cu.tb->w = textbox_w; + cu.tb->h = textbox_h; + cu.totbox = 1; + size_t len_bytes; + size_t len_chars = BLI_strlen_utf8_ex(layout.text.c_str(), &len_bytes); + cu.len_char32 = len_chars; + cu.len = len_bytes; + cu.pos = len_chars; + /* The reason for the additional character here is unknown, but reflects other code elsewhere. */ + cu.str = (char *)MEM_mallocN(len_bytes + sizeof(char32_t), __func__); + cu.strinfo = (CharInfo *)MEM_callocN((len_chars + 1) * sizeof(CharInfo), __func__); + BLI_strncpy(cu.str, layout.text.c_str(), len_bytes + 1); + + struct CharTrans *chartransdata = nullptr; + int text_len; + bool text_free; + const char32_t *r_text = nullptr; + /* Mode FO_DUPLI used because it doesn't create curve splines. */ + BKE_vfont_to_curve_ex( + nullptr, &cu, FO_DUPLI, nullptr, &r_text, &text_len, &text_free, &chartransdata); + + if (text_free) { + MEM_freeN((void *)r_text); + } + + Span<CharInfo> info{cu.strinfo, text_len}; + layout.final_font_size = cu.fsize_realtime; + layout.positions.reserve(text_len); + + for (const int i : IndexRange(text_len)) { + CharTrans &ct = chartransdata[i]; + layout.positions.append(float2(ct.xof, ct.yof) * layout.final_font_size); + + if ((info[i].flag & CU_CHINFO_OVERFLOW) && (cu.overflow == CU_OVERFLOW_TRUNCATE)) { + const int offset = BLI_str_utf8_offset_from_index(layout.text.c_str(), i + 1); + layout.truncated_text = layout.text.substr(offset); + layout.text = layout.text.substr(0, offset); + break; + } + } + + MEM_SAFE_FREE(chartransdata); + MEM_SAFE_FREE(cu.str); + MEM_SAFE_FREE(cu.strinfo); + MEM_SAFE_FREE(cu.tb); + + return layout; +} + +/* Returns a mapping of UTF-32 character code to instance handle. */ +static Map<int, int> create_curve_instances(GeoNodeExecParams ¶ms, + const float fontsize, + const Span<char32_t> charcodes, + InstancesComponent &instance_component) +{ + VFont *vfont = (VFont *)params.node().id; + Map<int, int> handles; + + for (int i : charcodes.index_range()) { + if (handles.contains(charcodes[i])) { + continue; + } + Curve cu = {nullptr}; + cu.type = OB_FONT; + cu.resolu = 12; + cu.vfont = vfont; + CharInfo charinfo = {0}; + charinfo.mat_nr = 1; + + BKE_vfont_build_char(&cu, &cu.nurb, charcodes[i], &charinfo, 0, 0, 0, i, 1); + std::unique_ptr<CurveEval> curve_eval = curve_eval_from_dna_curve(cu); + BKE_nurbList_free(&cu.nurb); + float4x4 size_matrix = float4x4::identity(); + size_matrix.apply_scale(fontsize); + curve_eval->transform(size_matrix); + + GeometrySet geometry_set_curve = GeometrySet::create_with_curve(curve_eval.release()); + handles.add_new(charcodes[i], instance_component.add_reference(std::move(geometry_set_curve))); + } + return handles; +} + +static void add_instances_from_handles(InstancesComponent &instances, + const Map<int, int> &char_handles, + const Span<char32_t> charcodes, + const Span<float2> positions) +{ + instances.resize(positions.size()); + MutableSpan<int> handles = instances.instance_reference_handles(); + MutableSpan<float4x4> transforms = instances.instance_transforms(); + MutableSpan<int> instance_ids = instances.instance_ids(); + + threading::parallel_for(IndexRange(positions.size()), 256, [&](IndexRange range) { + for (const int i : range) { + handles[i] = char_handles.lookup(charcodes[i]); + transforms[i] = float4x4::from_location({positions[i].x, positions[i].y, 0}); + instance_ids[i] = i; + } + }); +} + +static void geo_node_string_to_curves_exec(GeoNodeExecParams params) +{ + TextLayout layout = get_text_layout(params); + + const NodeGeometryStringToCurves &storage = + *(const NodeGeometryStringToCurves *)params.node().storage; + if (storage.overflow == GEO_NODE_STRING_TO_CURVES_MODE_TRUNCATE) { + params.set_output("Remainder", std::move(layout.truncated_text)); + } + + if (layout.positions.size() == 0) { + params.set_output("Curves", GeometrySet()); + return; + } + + /* Convert UTF-8 encoded string to UTF-32. */ + size_t len_bytes; + size_t len_chars = BLI_strlen_utf8_ex(layout.text.c_str(), &len_bytes); + Array<char32_t> char_codes(len_chars + 1); + BLI_str_utf8_as_utf32(char_codes.data(), layout.text.c_str(), len_chars + 1); + + /* Create and add instances. */ + GeometrySet geometry_set_out; + InstancesComponent &instances = geometry_set_out.get_component_for_write<InstancesComponent>(); + Map<int, int> char_handles = create_curve_instances( + params, layout.final_font_size, char_codes, instances); + add_instances_from_handles(instances, char_handles, char_codes, layout.positions); + + params.set_output("Curves", std::move(geometry_set_out)); +} + +} // namespace blender::nodes + +void register_node_type_geo_string_to_curves() +{ + static bNodeType ntype; + + geo_node_type_base( + &ntype, GEO_NODE_STRING_TO_CURVES, "String to Curves", NODE_CLASS_GEOMETRY, 0); + ntype.declare = blender::nodes::geo_node_string_to_curves_declare; + ntype.geometry_node_execute = blender::nodes::geo_node_string_to_curves_exec; + node_type_init(&ntype, blender::nodes::geo_node_string_to_curves_init); + node_type_update(&ntype, blender::nodes::geo_node_string_to_curves_update); + node_type_size(&ntype, 190, 120, 700); + node_type_storage(&ntype, + "NodeGeometryStringToCurves", + node_free_standard_storage, + node_copy_standard_storage); + ntype.draw_buttons = blender::nodes::geo_node_string_to_curves_layout; + nodeRegisterType(&ntype); +} |