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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.
*/
#include "DNA_curve_types.h"
#include "DNA_vfont_types.h"
#include "BKE_curve.h"
#include "BKE_spline.hh"
#include "BKE_vfont.h"
#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::node_geo_string_to_curves_cc {
static void geo_node_string_to_curves_declare(NodeDeclarationBuilder &b)
{
b.add_input<decl::String>(N_("String"));
b.add_input<decl::Float>(N_("Size")).default_value(1.0f).min(0.0f).subtype(PROP_DISTANCE);
b.add_input<decl::Float>(N_("Character Spacing"))
.default_value(1.0f)
.min(0.0f)
.subtype(PROP_DISTANCE);
b.add_input<decl::Float>(N_("Word Spacing"))
.default_value(1.0f)
.min(0.0f)
.subtype(PROP_DISTANCE);
b.add_input<decl::Float>(N_("Line Spacing"))
.default_value(1.0f)
.min(0.0f)
.subtype(PROP_DISTANCE);
b.add_input<decl::Float>(N_("Text Box Width"))
.default_value(0.0f)
.min(0.0f)
.subtype(PROP_DISTANCE);
b.add_input<decl::Float>(N_("Text Box Height"))
.default_value(0.0f)
.min(0.0f)
.subtype(PROP_DISTANCE);
b.add_output<decl::Geometry>(N_("Curves"));
b.add_output<decl::String>(N_("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 *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(
ntree, socket_remainder, overflow == GEO_NODE_STRING_TO_CURVES_MODE_TRUNCATE);
bNodeSocket *height_socket = (bNodeSocket *)node->inputs.last;
bNodeSocket *width_socket = height_socket->prev;
nodeSetSocketAvailability(
ntree, 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();
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});
}
});
}
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_with_null(len_chars + 1);
BLI_str_utf8_as_utf32(char_codes_with_null.data(), layout.text.c_str(), len_chars + 1);
const Span<char32_t> char_codes = char_codes_with_null.as_span().drop_back(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::node_geo_string_to_curves_cc
void register_node_type_geo_string_to_curves()
{
namespace file_ns = blender::nodes::node_geo_string_to_curves_cc;
static bNodeType ntype;
geo_node_type_base(
&ntype, GEO_NODE_STRING_TO_CURVES, "String to Curves", NODE_CLASS_GEOMETRY, 0);
ntype.declare = file_ns::geo_node_string_to_curves_declare;
ntype.geometry_node_execute = file_ns::geo_node_string_to_curves_exec;
node_type_init(&ntype, file_ns::geo_node_string_to_curves_init);
node_type_update(&ntype, file_ns::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 = file_ns::geo_node_string_to_curves_layout;
nodeRegisterType(&ntype);
}
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