engine: complete C ABI facade (liboakengine oakengine_* surface)
The full pure-C facade used by the app: node/project/timeline/viewer/ undo/task/events/serializer/playback/preview/renderer/gizmo/color/ audio/footage/proxy/encoding/exporter/config/disk/ipc/plugin/worker families, plus undo-group semantics, display renderer handles, NodeFactory accessors, and per-family pure-C engine tests.
This commit is contained in:
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/***
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Oak - Non-Linear Video Editor
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Copyright (C) 2026 Oak Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "oakengine/gizmo.h"
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#include <QString>
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#include "node/gizmo/draggable.h"
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#include "node/gizmo/text.h"
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#include "node/generator/text/textv3.h"
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#include "node/node.h"
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extern "C" {
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int oakengine_text_gizmo_get(OakEngineNode *node,
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int64_t time_num, int64_t time_den, oakengine_text_gizmo *out)
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{
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if (!node || !out) {
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return OAKENGINE_E_INVALID;
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}
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auto *textv3 = dynamic_cast<olive::TextGeneratorV3 *>(
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reinterpret_cast<olive::Node *>(node));
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if (!textv3) {
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return OAKENGINE_E_INVALID;
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}
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olive::TextGizmo *gizmo = textv3->text_gizmo();
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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QRectF r = gizmo->get_rect();
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out->rect_x = r.x();
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out->rect_y = r.y();
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out->rect_w = r.width();
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out->rect_h = r.height();
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// Map Qt::Alignment to our simple enum
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Qt::Alignment va = gizmo->get_vertical_alignment();
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if (va & Qt::AlignBottom) {
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out->vertical_alignment = 1;
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} else if (va & Qt::AlignVCenter) {
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out->vertical_alignment = 2;
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} else {
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out->vertical_alignment = 0; // AlignTop
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}
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return OAKENGINE_OK;
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}
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int oakengine_text_gizmo_get_html(OakEngineNode *node,
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int64_t time_num, int64_t time_den, char *buf, int buf_size)
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{
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if (!node) {
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return OAKENGINE_E_INVALID;
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}
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auto *textv3 = dynamic_cast<olive::TextGeneratorV3 *>(
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reinterpret_cast<olive::Node *>(node));
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if (!textv3) {
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return OAKENGINE_E_INVALID;
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}
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olive::TextGizmo *gizmo = textv3->text_gizmo();
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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QByteArray html = gizmo->get_html().toUtf8();
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int needed = html.size() + 1; // include NUL
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if (buf && buf_size > 0) {
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int copy = qMin(needed, buf_size);
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memcpy(buf, html.constData(), copy - 1);
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buf[copy - 1] = '\0';
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}
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return needed;
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}
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int oakengine_text_gizmo_update_html(OakEngineNode *node,
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const char *html, int64_t time_num, int64_t time_den)
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{
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if (!node || !html) {
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return OAKENGINE_E_INVALID;
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}
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auto *textv3 = dynamic_cast<olive::TextGeneratorV3 *>(
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reinterpret_cast<olive::Node *>(node));
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if (!textv3) {
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return OAKENGINE_E_INVALID;
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}
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olive::TextGizmo *gizmo = textv3->text_gizmo();
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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gizmo->update_input_html(QString::fromUtf8(html),
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olive::core::Rational(time_num, time_den));
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return OAKENGINE_OK;
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}
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int oakengine_text_gizmo_set_vertical_alignment(
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OakEngineNode *node, int alignment)
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{
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if (!node) {
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return OAKENGINE_E_INVALID;
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}
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auto *textv3 = dynamic_cast<olive::TextGeneratorV3 *>(
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reinterpret_cast<olive::Node *>(node));
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if (!textv3) {
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return OAKENGINE_E_INVALID;
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}
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olive::TextGizmo *gizmo = textv3->text_gizmo();
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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Qt::Alignment va;
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switch (alignment) {
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case 1:
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va = Qt::AlignBottom;
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break;
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case 2:
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va = Qt::AlignVCenter;
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break;
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default:
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va = Qt::AlignTop;
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break;
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}
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gizmo->set_vertical_alignment(va);
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return OAKENGINE_OK;
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}
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int oakengine_text_gizmo_activated(OakEngineNode *node)
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{
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if (!node) {
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return OAKENGINE_E_INVALID;
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}
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auto *textv3 = dynamic_cast<olive::TextGeneratorV3 *>(
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reinterpret_cast<olive::Node *>(node));
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if (!textv3) {
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return OAKENGINE_E_INVALID;
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}
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olive::TextGizmo *gizmo = textv3->text_gizmo();
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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emit gizmo->activated();
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return OAKENGINE_OK;
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}
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int oakengine_text_gizmo_deactivated(OakEngineNode *node)
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{
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if (!node) {
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return OAKENGINE_E_INVALID;
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}
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auto *textv3 = dynamic_cast<olive::TextGeneratorV3 *>(
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reinterpret_cast<olive::Node *>(node));
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if (!textv3) {
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return OAKENGINE_E_INVALID;
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}
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olive::TextGizmo *gizmo = textv3->text_gizmo();
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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emit gizmo->deactivated();
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return OAKENGINE_OK;
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}
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int oakengine_gizmo_get_drag_value_behavior(void *gizmo)
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{
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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auto *dg = dynamic_cast<olive::DraggableGizmo *>(
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static_cast<olive::NodeGizmo *>(gizmo));
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if (!dg) {
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return OAKENGINE_E_INVALID;
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}
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return static_cast<int>(dg->get_drag_value_behavior());
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}
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int oakengine_gizmo_drag_start(void *gizmo,
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void *row, double abs_x, double abs_y, int64_t time_num,
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int64_t time_den)
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{
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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auto *dg = dynamic_cast<olive::DraggableGizmo *>(
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static_cast<olive::NodeGizmo *>(gizmo));
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if (!dg) {
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return OAKENGINE_E_INVALID;
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}
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olive::NodeValueRow empty_row;
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olive::NodeValueRow &row_ref = row
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? *static_cast<olive::NodeValueRow *>(row)
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: empty_row;
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dg->drag_start(row_ref, abs_x, abs_y,
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olive::core::Rational(time_num, time_den));
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return OAKENGINE_OK;
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}
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int oakengine_gizmo_drag_move(void *gizmo,
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double x, double y, int qt_keyboard_modifiers)
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{
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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auto *dg = dynamic_cast<olive::DraggableGizmo *>(
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static_cast<olive::NodeGizmo *>(gizmo));
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if (!dg) {
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return OAKENGINE_E_INVALID;
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}
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dg->drag_move(x, y, Qt::KeyboardModifiers(qt_keyboard_modifiers));
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return OAKENGINE_OK;
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}
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int oakengine_gizmo_drag_end(void *gizmo, void *command)
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{
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if (!gizmo) {
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return OAKENGINE_E_INVALID;
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}
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auto *dg = dynamic_cast<olive::DraggableGizmo *>(
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static_cast<olive::NodeGizmo *>(gizmo));
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if (!dg) {
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return OAKENGINE_E_INVALID;
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}
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dg->drag_end(static_cast<olive::MultiUndoCommand *>(command));
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return OAKENGINE_OK;
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}
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} // extern "C"
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