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obs-studio/UI/window-basic-preview.cpp

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#include <QGuiApplication>
#include <QMouseEvent>
#include <cmath>
#include <string>
#include <graphics/vec4.h>
#include <graphics/matrix4.h>
#include "window-basic-preview.hpp"
#include "window-basic-main.hpp"
#include "obs-app.hpp"
#include "platform.hpp"
#define HANDLE_RADIUS 4.0f
#define HANDLE_SEL_RADIUS (HANDLE_RADIUS * 1.5f)
/* TODO: make C++ math classes and clean up code here later */
OBSBasicPreview::OBSBasicPreview(QWidget *parent, Qt::WindowFlags flags)
: OBSQTDisplay(parent, flags)
{
ResetScrollingOffset();
setMouseTracking(true);
}
OBSBasicPreview::~OBSBasicPreview()
{
obs_enter_graphics();
if (overflow)
gs_texture_destroy(overflow);
if (rectFill)
gs_vertexbuffer_destroy(rectFill);
obs_leave_graphics();
if (wrapper)
obs_data_release(wrapper);
}
vec2 OBSBasicPreview::GetMouseEventPos(QMouseEvent *event)
{
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
float pixelRatio = main->devicePixelRatioF();
float scale = pixelRatio / main->previewScale;
vec2 pos;
vec2_set(&pos,
(float(event->x()) - main->previewX / pixelRatio) * scale,
(float(event->y()) - main->previewY / pixelRatio) * scale);
return pos;
}
struct SceneFindData {
const vec2 &pos;
OBSSceneItem item;
bool selectBelow;
obs_sceneitem_t *group = nullptr;
SceneFindData(const SceneFindData &) = delete;
SceneFindData(SceneFindData &&) = delete;
SceneFindData &operator=(const SceneFindData &) = delete;
SceneFindData &operator=(SceneFindData &&) = delete;
inline SceneFindData(const vec2 &pos_, bool selectBelow_)
: pos(pos_), selectBelow(selectBelow_)
{
}
};
struct SceneFindBoxData {
const vec2 &startPos;
const vec2 &pos;
std::vector<obs_sceneitem_t *> sceneItems;
SceneFindBoxData(const SceneFindData &) = delete;
SceneFindBoxData(SceneFindData &&) = delete;
SceneFindBoxData &operator=(const SceneFindData &) = delete;
SceneFindBoxData &operator=(SceneFindData &&) = delete;
inline SceneFindBoxData(const vec2 &startPos_, const vec2 &pos_)
: startPos(startPos_), pos(pos_)
{
}
};
static bool SceneItemHasVideo(obs_sceneitem_t *item)
{
obs_source_t *source = obs_sceneitem_get_source(item);
uint32_t flags = obs_source_get_output_flags(source);
return (flags & OBS_SOURCE_VIDEO) != 0;
}
static bool CloseFloat(float a, float b, float epsilon = 0.01)
{
using std::abs;
return abs(a - b) <= epsilon;
}
static bool FindItemAtPos(obs_scene_t *scene, obs_sceneitem_t *item,
void *param)
{
SceneFindData *data = reinterpret_cast<SceneFindData *>(param);
matrix4 transform;
matrix4 invTransform;
vec3 transformedPos;
vec3 pos3;
vec3 pos3_;
if (!SceneItemHasVideo(item))
return true;
if (obs_sceneitem_locked(item))
return true;
vec3_set(&pos3, data->pos.x, data->pos.y, 0.0f);
obs_sceneitem_get_box_transform(item, &transform);
matrix4_inv(&invTransform, &transform);
vec3_transform(&transformedPos, &pos3, &invTransform);
vec3_transform(&pos3_, &transformedPos, &transform);
if (CloseFloat(pos3.x, pos3_.x) && CloseFloat(pos3.y, pos3_.y) &&
transformedPos.x >= 0.0f && transformedPos.x <= 1.0f &&
transformedPos.y >= 0.0f && transformedPos.y <= 1.0f) {
if (data->selectBelow && obs_sceneitem_selected(item)) {
if (data->item)
return false;
else
data->selectBelow = false;
}
data->item = item;
}
UNUSED_PARAMETER(scene);
return true;
}
static vec3 GetTransformedPos(float x, float y, const matrix4 &mat)
{
vec3 result;
vec3_set(&result, x, y, 0.0f);
vec3_transform(&result, &result, &mat);
return result;
}
static inline vec2 GetOBSScreenSize()
{
obs_video_info ovi;
vec2 size;
vec2_zero(&size);
if (obs_get_video_info(&ovi)) {
size.x = float(ovi.base_width);
size.y = float(ovi.base_height);
}
return size;
}
vec3 OBSBasicPreview::GetSnapOffset(const vec3 &tl, const vec3 &br)
{
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
vec2 screenSize = GetOBSScreenSize();
vec3 clampOffset;
vec3_zero(&clampOffset);
const bool snap = config_get_bool(GetGlobalConfig(), "BasicWindow",
"SnappingEnabled");
if (snap == false)
return clampOffset;
const bool screenSnap = config_get_bool(
GetGlobalConfig(), "BasicWindow", "ScreenSnapping");
const bool centerSnap = config_get_bool(
GetGlobalConfig(), "BasicWindow", "CenterSnapping");
const float clampDist = config_get_double(GetGlobalConfig(),
"BasicWindow",
"SnapDistance") /
main->previewScale;
const float centerX = br.x - (br.x - tl.x) / 2.0f;
const float centerY = br.y - (br.y - tl.y) / 2.0f;
// Left screen edge.
if (screenSnap && fabsf(tl.x) < clampDist)
clampOffset.x = -tl.x;
// Right screen edge.
if (screenSnap && fabsf(clampOffset.x) < EPSILON &&
fabsf(screenSize.x - br.x) < clampDist)
clampOffset.x = screenSize.x - br.x;
// Horizontal center.
if (centerSnap && fabsf(screenSize.x - (br.x - tl.x)) > clampDist &&
fabsf(screenSize.x / 2.0f - centerX) < clampDist)
clampOffset.x = screenSize.x / 2.0f - centerX;
// Top screen edge.
if (screenSnap && fabsf(tl.y) < clampDist)
clampOffset.y = -tl.y;
// Bottom screen edge.
if (screenSnap && fabsf(clampOffset.y) < EPSILON &&
fabsf(screenSize.y - br.y) < clampDist)
clampOffset.y = screenSize.y - br.y;
// Vertical center.
if (centerSnap && fabsf(screenSize.y - (br.y - tl.y)) > clampDist &&
fabsf(screenSize.y / 2.0f - centerY) < clampDist)
clampOffset.y = screenSize.y / 2.0f - centerY;
return clampOffset;
}
OBSSceneItem OBSBasicPreview::GetItemAtPos(const vec2 &pos, bool selectBelow)
{
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
OBSScene scene = main->GetCurrentScene();
if (!scene)
return OBSSceneItem();
SceneFindData data(pos, selectBelow);
obs_scene_enum_items(scene, FindItemAtPos, &data);
return data.item;
}
static bool CheckItemSelected(obs_scene_t *scene, obs_sceneitem_t *item,
void *param)
{
SceneFindData *data = reinterpret_cast<SceneFindData *>(param);
matrix4 transform;
vec3 transformedPos;
vec3 pos3;
if (!SceneItemHasVideo(item))
return true;
if (obs_sceneitem_is_group(item)) {
data->group = item;
obs_sceneitem_group_enum_items(item, CheckItemSelected, param);
data->group = nullptr;
if (data->item) {
return false;
}
}
vec3_set(&pos3, data->pos.x, data->pos.y, 0.0f);
obs_sceneitem_get_box_transform(item, &transform);
if (data->group) {
matrix4 parent_transform;
obs_sceneitem_get_draw_transform(data->group,
&parent_transform);
matrix4_mul(&transform, &transform, &parent_transform);
}
matrix4_inv(&transform, &transform);
vec3_transform(&transformedPos, &pos3, &transform);
if (transformedPos.x >= 0.0f && transformedPos.x <= 1.0f &&
transformedPos.y >= 0.0f && transformedPos.y <= 1.0f) {
if (obs_sceneitem_selected(item)) {
data->item = item;
return false;
}
}
UNUSED_PARAMETER(scene);
return true;
}
bool OBSBasicPreview::SelectedAtPos(const vec2 &pos)
{
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
OBSScene scene = main->GetCurrentScene();
if (!scene)
return false;
SceneFindData data(pos, false);
obs_scene_enum_items(scene, CheckItemSelected, &data);
return !!data.item;
}
struct HandleFindData {
const vec2 &pos;
const float radius;
matrix4 parent_xform;
OBSSceneItem item;
ItemHandle handle = ItemHandle::None;
HandleFindData(const HandleFindData &) = delete;
HandleFindData(HandleFindData &&) = delete;
HandleFindData &operator=(const HandleFindData &) = delete;
HandleFindData &operator=(HandleFindData &&) = delete;
inline HandleFindData(const vec2 &pos_, float scale)
: pos(pos_), radius(HANDLE_SEL_RADIUS / scale)
{
matrix4_identity(&parent_xform);
}
inline HandleFindData(const HandleFindData &hfd,
obs_sceneitem_t *parent)
: pos(hfd.pos),
radius(hfd.radius),
item(hfd.item),
handle(hfd.handle)
{
obs_sceneitem_get_draw_transform(parent, &parent_xform);
}
};
static bool FindHandleAtPos(obs_scene_t *scene, obs_sceneitem_t *item,
void *param)
{
HandleFindData &data = *reinterpret_cast<HandleFindData *>(param);
if (!obs_sceneitem_selected(item)) {
if (obs_sceneitem_is_group(item)) {
HandleFindData newData(data, item);
obs_sceneitem_group_enum_items(item, FindHandleAtPos,
&newData);
data.item = newData.item;
data.handle = newData.handle;
}
return true;
}
matrix4 transform;
vec3 pos3;
float closestHandle = data.radius;
vec3_set(&pos3, data.pos.x, data.pos.y, 0.0f);
obs_sceneitem_get_box_transform(item, &transform);
auto TestHandle = [&](float x, float y, ItemHandle handle) {
vec3 handlePos = GetTransformedPos(x, y, transform);
vec3_transform(&handlePos, &handlePos, &data.parent_xform);
float dist = vec3_dist(&handlePos, &pos3);
if (dist < data.radius) {
if (dist < closestHandle) {
closestHandle = dist;
data.handle = handle;
data.item = item;
}
}
};
TestHandle(0.0f, 0.0f, ItemHandle::TopLeft);
TestHandle(0.5f, 0.0f, ItemHandle::TopCenter);
TestHandle(1.0f, 0.0f, ItemHandle::TopRight);
TestHandle(0.0f, 0.5f, ItemHandle::CenterLeft);
TestHandle(1.0f, 0.5f, ItemHandle::CenterRight);
TestHandle(0.0f, 1.0f, ItemHandle::BottomLeft);
TestHandle(0.5f, 1.0f, ItemHandle::BottomCenter);
TestHandle(1.0f, 1.0f, ItemHandle::BottomRight);
UNUSED_PARAMETER(scene);
return true;
}
static vec2 GetItemSize(obs_sceneitem_t *item)
{
obs_bounds_type boundsType = obs_sceneitem_get_bounds_type(item);
vec2 size;
if (boundsType != OBS_BOUNDS_NONE) {
obs_sceneitem_get_bounds(item, &size);
} else {
obs_source_t *source = obs_sceneitem_get_source(item);
obs_sceneitem_crop crop;
vec2 scale;
obs_sceneitem_get_scale(item, &scale);
obs_sceneitem_get_crop(item, &crop);
size.x = float(obs_source_get_width(source) - crop.left -
crop.right) *
scale.x;
size.y = float(obs_source_get_height(source) - crop.top -
crop.bottom) *
scale.y;
}
return size;
}
void OBSBasicPreview::GetStretchHandleData(const vec2 &pos, bool ignoreGroup)
{
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
OBSScene scene = main->GetCurrentScene();
if (!scene)
return;
float scale = main->previewScale / main->devicePixelRatioF();
vec2 scaled_pos = pos;
vec2_divf(&scaled_pos, &scaled_pos, scale);
HandleFindData data(scaled_pos, scale);
obs_scene_enum_items(scene, FindHandleAtPos, &data);
stretchItem = std::move(data.item);
stretchHandle = data.handle;
if (stretchHandle != ItemHandle::None) {
matrix4 boxTransform;
vec3 itemUL;
float itemRot;
stretchItemSize = GetItemSize(stretchItem);
obs_sceneitem_get_box_transform(stretchItem, &boxTransform);
itemRot = obs_sceneitem_get_rot(stretchItem);
vec3_from_vec4(&itemUL, &boxTransform.t);
/* build the item space conversion matrices */
matrix4_identity(&itemToScreen);
matrix4_rotate_aa4f(&itemToScreen, &itemToScreen, 0.0f, 0.0f,
1.0f, RAD(itemRot));
matrix4_translate3f(&itemToScreen, &itemToScreen, itemUL.x,
itemUL.y, 0.0f);
matrix4_identity(&screenToItem);
matrix4_translate3f(&screenToItem, &screenToItem, -itemUL.x,
-itemUL.y, 0.0f);
matrix4_rotate_aa4f(&screenToItem, &screenToItem, 0.0f, 0.0f,
1.0f, RAD(-itemRot));
obs_sceneitem_get_crop(stretchItem, &startCrop);
obs_sceneitem_get_pos(stretchItem, &startItemPos);
obs_source_t *source = obs_sceneitem_get_source(stretchItem);
cropSize.x = float(obs_source_get_width(source) -
startCrop.left - startCrop.right);
cropSize.y = float(obs_source_get_height(source) -
startCrop.top - startCrop.bottom);
stretchGroup = obs_sceneitem_get_group(scene, stretchItem);
if (stretchGroup && !ignoreGroup) {
obs_sceneitem_get_draw_transform(stretchGroup,
&invGroupTransform);
matrix4_inv(&invGroupTransform, &invGroupTransform);
obs_sceneitem_defer_group_resize_begin(stretchGroup);
}
}
}
void OBSBasicPreview::keyPressEvent(QKeyEvent *event)
{
if (!IsFixedScaling() || event->isAutoRepeat()) {
OBSQTDisplay::keyPressEvent(event);
return;
}
switch (event->key()) {
case Qt::Key_Space:
setCursor(Qt::OpenHandCursor);
scrollMode = true;
break;
}
OBSQTDisplay::keyPressEvent(event);
}
void OBSBasicPreview::keyReleaseEvent(QKeyEvent *event)
{
if (event->isAutoRepeat()) {
OBSQTDisplay::keyReleaseEvent(event);
return;
}
switch (event->key()) {
case Qt::Key_Space:
scrollMode = false;
setCursor(Qt::ArrowCursor);
break;
}
OBSQTDisplay::keyReleaseEvent(event);
}
void OBSBasicPreview::wheelEvent(QWheelEvent *event)
{
if (scrollMode && IsFixedScaling()) {
const int delta = event->angleDelta().y();
if (delta != 0) {
if (delta > 0)
SetScalingLevel(scalingLevel + 1);
else
SetScalingLevel(scalingLevel - 1);
emit DisplayResized();
}
}
OBSQTDisplay::wheelEvent(event);
}
void OBSBasicPreview::mousePressEvent(QMouseEvent *event)
{
if (scrollMode && IsFixedScaling() &&
event->button() == Qt::LeftButton) {
setCursor(Qt::ClosedHandCursor);
scrollingFrom.x = event->x();
scrollingFrom.y = event->y();
return;
}
if (event->button() == Qt::RightButton) {
scrollMode = false;
setCursor(Qt::ArrowCursor);
}
if (locked) {
OBSQTDisplay::mousePressEvent(event);
return;
}
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
float pixelRatio = main->devicePixelRatioF();
float x = float(event->x()) - main->previewX / pixelRatio;
float y = float(event->y()) - main->previewY / pixelRatio;
Qt::KeyboardModifiers modifiers = QGuiApplication::keyboardModifiers();
bool altDown = (modifiers & Qt::AltModifier);
bool shiftDown = (modifiers & Qt::ShiftModifier);
bool ctrlDown = (modifiers & Qt::ControlModifier);
OBSQTDisplay::mousePressEvent(event);
if (event->button() != Qt::LeftButton &&
event->button() != Qt::RightButton)
return;
if (event->button() == Qt::LeftButton)
mouseDown = true;
{
std::lock_guard<std::mutex> lock(selectMutex);
selectedItems.clear();
}
if (altDown)
cropping = true;
if (altDown || shiftDown || ctrlDown) {
vec2 s;
SceneFindBoxData data(s, s);
obs_scene_enum_items(main->GetCurrentScene(), FindSelected,
&data);
std::lock_guard<std::mutex> lock(selectMutex);
selectedItems = data.sceneItems;
}
vec2_set(&startPos, x, y);
GetStretchHandleData(startPos, false);
vec2_divf(&startPos, &startPos, main->previewScale / pixelRatio);
startPos.x = std::round(startPos.x);
startPos.y = std::round(startPos.y);
mouseOverItems = SelectedAtPos(startPos);
vec2_zero(&lastMoveOffset);
mousePos = startPos;
if (wrapper)
obs_data_release(wrapper);
wrapper =
obs_scene_save_transform_states(main->GetCurrentScene(), true);
changed = false;
}
void OBSBasicPreview::UpdateCursor(uint32_t &flags)
{
if (!flags && cursor().shape() != Qt::OpenHandCursor)
unsetCursor();
if (cursor().shape() != Qt::ArrowCursor)
return;
if ((flags & ITEM_LEFT && flags & ITEM_TOP) ||
(flags & ITEM_RIGHT && flags & ITEM_BOTTOM))
setCursor(Qt::SizeFDiagCursor);
else if ((flags & ITEM_LEFT && flags & ITEM_BOTTOM) ||
(flags & ITEM_RIGHT && flags & ITEM_TOP))
setCursor(Qt::SizeBDiagCursor);
else if (flags & ITEM_LEFT || flags & ITEM_RIGHT)
setCursor(Qt::SizeHorCursor);
else if (flags & ITEM_TOP || flags & ITEM_BOTTOM)
setCursor(Qt::SizeVerCursor);
}
static bool select_one(obs_scene_t *scene, obs_sceneitem_t *item, void *param)
{
obs_sceneitem_t *selectedItem =
reinterpret_cast<obs_sceneitem_t *>(param);
if (obs_sceneitem_is_group(item))
obs_sceneitem_group_enum_items(item, select_one, param);
obs_sceneitem_select(item, (selectedItem == item));
UNUSED_PARAMETER(scene);
return true;
}
void OBSBasicPreview::DoSelect(const vec2 &pos)
{
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
OBSScene scene = main->GetCurrentScene();
OBSSceneItem item = GetItemAtPos(pos, true);
obs_scene_enum_items(scene, select_one, (obs_sceneitem_t *)item);
}
void OBSBasicPreview::DoCtrlSelect(const vec2 &pos)
{
OBSSceneItem item = GetItemAtPos(pos, false);
if (!item)
return;
bool selected = obs_sceneitem_selected(item);
obs_sceneitem_select(item, !selected);
}
void OBSBasicPreview::ProcessClick(const vec2 &pos)
{
Qt::KeyboardModifiers modifiers = QGuiApplication::keyboardModifiers();
if (modifiers & Qt::ControlModifier)
DoCtrlSelect(pos);
else
DoSelect(pos);
}
void OBSBasicPreview::mouseReleaseEvent(QMouseEvent *event)
{
if (scrollMode)
setCursor(Qt::OpenHandCursor);
if (locked) {
OBSQTDisplay::mouseReleaseEvent(event);
return;
}
if (mouseDown) {
vec2 pos = GetMouseEventPos(event);
if (!mouseMoved)
ProcessClick(pos);
if (selectionBox) {
Qt::KeyboardModifiers modifiers =
QGuiApplication::keyboardModifiers();
bool altDown = modifiers & Qt::AltModifier;
bool shiftDown = modifiers & Qt::ShiftModifier;
bool ctrlDown = modifiers & Qt::ControlModifier;
std::lock_guard<std::mutex> lock(selectMutex);
if (altDown || ctrlDown || shiftDown) {
for (size_t i = 0; i < selectedItems.size();
i++) {
obs_sceneitem_select(selectedItems[i],
true);
}
}
for (size_t i = 0; i < hoveredPreviewItems.size();
i++) {
bool select = true;
obs_sceneitem_t *item = hoveredPreviewItems[i];
if (altDown) {
select = false;
} else if (ctrlDown) {
select = !obs_sceneitem_selected(item);
}
obs_sceneitem_select(hoveredPreviewItems[i],
select);
}
}
if (stretchGroup) {
obs_sceneitem_defer_group_resize_end(stretchGroup);
}
stretchItem = nullptr;
stretchGroup = nullptr;
mouseDown = false;
mouseMoved = false;
cropping = false;
selectionBox = false;
unsetCursor();
OBSSceneItem item = GetItemAtPos(pos, true);
std::lock_guard<std::mutex> lock(selectMutex);
hoveredPreviewItems.clear();
hoveredPreviewItems.push_back(item);
selectedItems.clear();
}
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
obs_data_t *rwrapper =
obs_scene_save_transform_states(main->GetCurrentScene(), true);
auto undo_redo = [](const std::string &data) {
obs_data_t *dat = obs_data_create_from_json(data.c_str());
obs_source_t *source = obs_get_source_by_name(
obs_data_get_string(dat, "scene_name"));
reinterpret_cast<OBSBasic *>(App()->GetMainWindow())
->SetCurrentScene(source, true);
obs_source_release(source);
obs_data_release(dat);
obs_scene_load_transform_states(data.c_str());
};
if (wrapper && rwrapper) {
std::string undo_data(obs_data_get_json(wrapper));
std::string redo_data(obs_data_get_json(rwrapper));
if (changed && undo_data.compare(redo_data) != 0)
main->undo_s.add_action(
QTStr("Undo.Transform")
.arg(obs_source_get_name(
main->GetCurrentSceneSource())),
undo_redo, undo_redo, undo_data, redo_data);
}
if (wrapper)
obs_data_release(wrapper);
if (rwrapper)
obs_data_release(rwrapper);
wrapper = NULL;
}
struct SelectedItemBounds {
bool first = true;
vec3 tl, br;
};
static bool AddItemBounds(obs_scene_t *scene, obs_sceneitem_t *item,
void *param)
{
SelectedItemBounds *data =
reinterpret_cast<SelectedItemBounds *>(param);
vec3 t[4];
auto add_bounds = [data, &t]() {
for (const vec3 &v : t) {
if (data->first) {
vec3_copy(&data->tl, &v);
vec3_copy(&data->br, &v);
data->first = false;
} else {
vec3_min(&data->tl, &data->tl, &v);
vec3_max(&data->br, &data->br, &v);
}
}
};
if (obs_sceneitem_is_group(item)) {
SelectedItemBounds sib;
obs_sceneitem_group_enum_items(item, AddItemBounds, &sib);
if (!sib.first) {
matrix4 xform;
obs_sceneitem_get_draw_transform(item, &xform);
vec3_set(&t[0], sib.tl.x, sib.tl.y, 0.0f);
vec3_set(&t[1], sib.tl.x, sib.br.y, 0.0f);
vec3_set(&t[2], sib.br.x, sib.tl.y, 0.0f);
vec3_set(&t[3], sib.br.x, sib.br.y, 0.0f);
vec3_transform(&t[0], &t[0], &xform);
vec3_transform(&t[1], &t[1], &xform);
vec3_transform(&t[2], &t[2], &xform);
vec3_transform(&t[3], &t[3], &xform);
add_bounds();
}
}
if (!obs_sceneitem_selected(item))
return true;
matrix4 boxTransform;
obs_sceneitem_get_box_transform(item, &boxTransform);
t[0] = GetTransformedPos(0.0f, 0.0f, boxTransform);
t[1] = GetTransformedPos(1.0f, 0.0f, boxTransform);
t[2] = GetTransformedPos(0.0f, 1.0f, boxTransform);
t[3] = GetTransformedPos(1.0f, 1.0f, boxTransform);
add_bounds();
UNUSED_PARAMETER(scene);
return true;
}
struct OffsetData {
float clampDist;
vec3 tl, br, offset;
};
static bool GetSourceSnapOffset(obs_scene_t *scene, obs_sceneitem_t *item,
void *param)
{
OffsetData *data = reinterpret_cast<OffsetData *>(param);
if (obs_sceneitem_selected(item))
return true;
matrix4 boxTransform;
obs_sceneitem_get_box_transform(item, &boxTransform);
vec3 t[4] = {GetTransformedPos(0.0f, 0.0f, boxTransform),
GetTransformedPos(1.0f, 0.0f, boxTransform),
GetTransformedPos(0.0f, 1.0f, boxTransform),
GetTransformedPos(1.0f, 1.0f, boxTransform)};
bool first = true;
vec3 tl, br;
vec3_zero(&tl);
vec3_zero(&br);
for (const vec3 &v : t) {
if (first) {
vec3_copy(&tl, &v);
vec3_copy(&br, &v);
first = false;
} else {
vec3_min(&tl, &tl, &v);
vec3_max(&br, &br, &v);
}
}
// Snap to other source edges
#define EDGE_SNAP(l, r, x, y) \
do { \
double dist = fabsf(l.x - data->r.x); \
if (dist < data->clampDist && \
fabsf(data->offset.x) < EPSILON && data->tl.y < br.y && \
data->br.y > tl.y && \
(fabsf(data->offset.x) > dist || \
data->offset.x < EPSILON)) \
data->offset.x = l.x - data->r.x; \
} while (false)
EDGE_SNAP(tl, br, x, y);
EDGE_SNAP(tl, br, y, x);
EDGE_SNAP(br, tl, x, y);
EDGE_SNAP(br, tl, y, x);
#undef EDGE_SNAP
UNUSED_PARAMETER(scene);
return true;
}
void OBSBasicPreview::SnapItemMovement(vec2 &offset)
{
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
OBSScene scene = main->GetCurrentScene();
SelectedItemBounds data;
obs_scene_enum_items(scene, AddItemBounds, &data);
data.tl.x += offset.x;
data.tl.y += offset.y;
data.br.x += offset.x;
data.br.y += offset.y;
vec3 snapOffset = GetSnapOffset(data.tl, data.br);
const bool snap = config_get_bool(GetGlobalConfig(), "BasicWindow",
"SnappingEnabled");
const bool sourcesSnap = config_get_bool(
GetGlobalConfig(), "BasicWindow", "SourceSnapping");
if (snap == false)
return;
if (sourcesSnap == false) {
offset.x += snapOffset.x;
offset.y += snapOffset.y;
return;
}
const float clampDist = config_get_double(GetGlobalConfig(),
"BasicWindow",
"SnapDistance") /
main->previewScale;
OffsetData offsetData;
offsetData.clampDist = clampDist;
offsetData.tl = data.tl;
offsetData.br = data.br;
vec3_copy(&offsetData.offset, &snapOffset);
obs_scene_enum_items(scene, GetSourceSnapOffset, &offsetData);
if (fabsf(offsetData.offset.x) > EPSILON ||
fabsf(offsetData.offset.y) > EPSILON) {
offset.x += offsetData.offset.x;
offset.y += offsetData.offset.y;
} else {
offset.x += snapOffset.x;
offset.y += snapOffset.y;
}
}
static bool move_items(obs_scene_t *scene, obs_sceneitem_t *item, void *param)
{
if (obs_sceneitem_locked(item))
return true;
bool selected = obs_sceneitem_selected(item);
vec2 *offset = reinterpret_cast<vec2 *>(param);
if (obs_sceneitem_is_group(item) && !selected) {
matrix4 transform;
vec3 new_offset;
vec3_set(&new_offset, offset->x, offset->y, 0.0f);
obs_sceneitem_get_draw_transform(item, &transform);
vec4_set(&transform.t, 0.0f, 0.0f, 0.0f, 1.0f);
matrix4_inv(&transform, &transform);
vec3_transform(&new_offset, &new_offset, &transform);
obs_sceneitem_group_enum_items(item, move_items, &new_offset);
}
if (selected) {
vec2 pos;
obs_sceneitem_get_pos(item, &pos);
vec2_add(&pos, &pos, offset);
obs_sceneitem_set_pos(item, &pos);
}
UNUSED_PARAMETER(scene);
return true;
}
void OBSBasicPreview::MoveItems(const vec2 &pos)
{
Qt::KeyboardModifiers modifiers = QGuiApplication::keyboardModifiers();
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
OBSScene scene = main->GetCurrentScene();
vec2 offset, moveOffset;
vec2_sub(&offset, &pos, &startPos);
vec2_sub(&moveOffset, &offset, &lastMoveOffset);
if (!(modifiers & Qt::ControlModifier))
SnapItemMovement(moveOffset);
vec2_add(&lastMoveOffset, &lastMoveOffset, &moveOffset);
obs_scene_enum_items(scene, move_items, &moveOffset);
}
static bool CounterClockwise(float x1, float x2, float x3, float y1, float y2,
float y3)
{
return (y3 - y1) * (x2 - x1) > (y2 - y1) * (x3 - x1);
}
static bool IntersectLine(float x1, float x2, float x3, float x4, float y1,
float y2, float y3, float y4)
{
bool a = CounterClockwise(x1, x2, x3, y1, y2, y3);
bool b = CounterClockwise(x1, x2, x4, y1, y2, y4);
bool c = CounterClockwise(x3, x4, x1, y3, y4, y1);
bool d = CounterClockwise(x3, x4, x2, y3, y4, y2);
return (a != b) && (c != d);
}
static bool IntersectBox(matrix4 transform, float x1, float x2, float y1,
float y2)
{
float x3, x4, y3, y4;
x3 = transform.t.x;
y3 = transform.t.y;
x4 = x3 + transform.x.x;
y4 = y3 + transform.x.y;
if (IntersectLine(x1, x1, x3, x4, y1, y2, y3, y4) ||
IntersectLine(x1, x2, x3, x4, y1, y1, y3, y4) ||
IntersectLine(x2, x2, x3, x4, y1, y2, y3, y4) ||
IntersectLine(x1, x2, x3, x4, y2, y2, y3, y4))
return true;
x4 = x3 + transform.y.x;
y4 = y3 + transform.y.y;
if (IntersectLine(x1, x1, x3, x4, y1, y2, y3, y4) ||
IntersectLine(x1, x2, x3, x4, y1, y1, y3, y4) ||
IntersectLine(x2, x2, x3, x4, y1, y2, y3, y4) ||
IntersectLine(x1, x2, x3, x4, y2, y2, y3, y4))
return true;
x3 = transform.t.x + transform.x.x;
y3 = transform.t.y + transform.x.y;
x4 = x3 + transform.y.x;
y4 = y3 + transform.y.y;
if (IntersectLine(x1, x1, x3, x4, y1, y2, y3, y4) ||
IntersectLine(x1, x2, x3, x4, y1, y1, y3, y4) ||
IntersectLine(x2, x2, x3, x4, y1, y2, y3, y4) ||
IntersectLine(x1, x2, x3, x4, y2, y2, y3, y4))
return true;
x3 = transform.t.x + transform.y.x;
y3 = transform.t.y + transform.y.y;
x4 = x3 + transform.x.x;
y4 = y3 + transform.x.y;
if (IntersectLine(x1, x1, x3, x4, y1, y2, y3, y4) ||
IntersectLine(x1, x2, x3, x4, y1, y1, y3, y4) ||
IntersectLine(x2, x2, x3, x4, y1, y2, y3, y4) ||
IntersectLine(x1, x2, x3, x4, y2, y2, y3, y4))
return true;
return false;
}
#undef PI
bool OBSBasicPreview::FindSelected(obs_scene_t *scene, obs_sceneitem_t *item,
void *param)
{
SceneFindBoxData *data = reinterpret_cast<SceneFindBoxData *>(param);
if (obs_sceneitem_selected(item))
data->sceneItems.push_back(item);
UNUSED_PARAMETER(scene);
return true;
}
static bool FindItemsInBox(obs_scene_t *scene, obs_sceneitem_t *item,
void *param)
{
SceneFindBoxData *data = reinterpret_cast<SceneFindBoxData *>(param);
matrix4 transform;
matrix4 invTransform;
vec3 transformedPos;
vec3 pos3;
vec3 pos3_;
vec2 pos_min, pos_max;
vec2_min(&pos_min, &data->startPos, &data->pos);
vec2_max(&pos_max, &data->startPos, &data->pos);
const float x1 = pos_min.x;
const float x2 = pos_max.x;
const float y1 = pos_min.y;
const float y2 = pos_max.y;
if (!SceneItemHasVideo(item))
return true;
if (obs_sceneitem_locked(item))
return true;
if (!obs_sceneitem_visible(item))
return true;
vec3_set(&pos3, data->pos.x, data->pos.y, 0.0f);
obs_sceneitem_get_box_transform(item, &transform);
matrix4_inv(&invTransform, &transform);
vec3_transform(&transformedPos, &pos3, &invTransform);
vec3_transform(&pos3_, &transformedPos, &transform);
if (CloseFloat(pos3.x, pos3_.x) && CloseFloat(pos3.y, pos3_.y) &&
transformedPos.x >= 0.0f && transformedPos.x <= 1.0f &&
transformedPos.y >= 0.0f && transformedPos.y <= 1.0f) {
data->sceneItems.push_back(item);
return true;
}
if (transform.t.x > x1 && transform.t.x < x2 && transform.t.y > y1 &&
transform.t.y < y2) {
data->sceneItems.push_back(item);
return true;
}
if (transform.t.x + transform.x.x > x1 &&
transform.t.x + transform.x.x < x2 &&
transform.t.y + transform.x.y > y1 &&
transform.t.y + transform.x.y < y2) {
data->sceneItems.push_back(item);
return true;
}
if (transform.t.x + transform.y.x > x1 &&
transform.t.x + transform.y.x < x2 &&
transform.t.y + transform.y.y > y1 &&
transform.t.y + transform.y.y < y2) {
data->sceneItems.push_back(item);
return true;
}
if (transform.t.x + transform.x.x + transform.y.x > x1 &&
transform.t.x + transform.x.x + transform.y.x < x2 &&
transform.t.y + transform.x.y + transform.y.y > y1 &&
transform.t.y + transform.x.y + transform.y.y < y2) {
data->sceneItems.push_back(item);
return true;
}
if (transform.t.x + 0.5 * (transform.x.x + transform.y.x) > x1 &&
transform.t.x + 0.5 * (transform.x.x + transform.y.x) < x2 &&
transform.t.y + 0.5 * (transform.x.y + transform.y.y) > y1 &&
transform.t.y + 0.5 * (transform.x.y + transform.y.y) < y2) {
data->sceneItems.push_back(item);
return true;
}
if (IntersectBox(transform, x1, x2, y1, y2)) {
data->sceneItems.push_back(item);
return true;
}
UNUSED_PARAMETER(scene);
return true;
}
void OBSBasicPreview::BoxItems(const vec2 &startPos, const vec2 &pos)
{
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
OBSScene scene = main->GetCurrentScene();
if (!scene)
return;
if (cursor().shape() != Qt::CrossCursor)
setCursor(Qt::CrossCursor);
SceneFindBoxData data(startPos, pos);
obs_scene_enum_items(scene, FindItemsInBox, &data);
std::lock_guard<std::mutex> lock(selectMutex);
hoveredPreviewItems = data.sceneItems;
}
vec3 OBSBasicPreview::CalculateStretchPos(const vec3 &tl, const vec3 &br)
{
uint32_t alignment = obs_sceneitem_get_alignment(stretchItem);
vec3 pos;
vec3_zero(&pos);
if (alignment & OBS_ALIGN_LEFT)
pos.x = tl.x;
else if (alignment & OBS_ALIGN_RIGHT)
pos.x = br.x;
else
pos.x = (br.x - tl.x) * 0.5f + tl.x;
if (alignment & OBS_ALIGN_TOP)
pos.y = tl.y;
else if (alignment & OBS_ALIGN_BOTTOM)
pos.y = br.y;
else
pos.y = (br.y - tl.y) * 0.5f + tl.y;
return pos;
}
void OBSBasicPreview::ClampAspect(vec3 &tl, vec3 &br, vec2 &size,
const vec2 &baseSize)
{
float baseAspect = baseSize.x / baseSize.y;
float aspect = size.x / size.y;
uint32_t stretchFlags = (uint32_t)stretchHandle;
if (stretchHandle == ItemHandle::TopLeft ||
stretchHandle == ItemHandle::TopRight ||
stretchHandle == ItemHandle::BottomLeft ||
stretchHandle == ItemHandle::BottomRight) {
if (aspect < baseAspect) {
if ((size.y >= 0.0f && size.x >= 0.0f) ||
(size.y <= 0.0f && size.x <= 0.0f))
size.x = size.y * baseAspect;
else
size.x = size.y * baseAspect * -1.0f;
} else {
if ((size.y >= 0.0f && size.x >= 0.0f) ||
(size.y <= 0.0f && size.x <= 0.0f))
size.y = size.x / baseAspect;
else
size.y = size.x / baseAspect * -1.0f;
}
} else if (stretchHandle == ItemHandle::TopCenter ||
stretchHandle == ItemHandle::BottomCenter) {
if ((size.y >= 0.0f && size.x >= 0.0f) ||
(size.y <= 0.0f && size.x <= 0.0f))
size.x = size.y * baseAspect;
else
size.x = size.y * baseAspect * -1.0f;
} else if (stretchHandle == ItemHandle::CenterLeft ||
stretchHandle == ItemHandle::CenterRight) {
if ((size.y >= 0.0f && size.x >= 0.0f) ||
(size.y <= 0.0f && size.x <= 0.0f))
size.y = size.x / baseAspect;
else
size.y = size.x / baseAspect * -1.0f;
}
size.x = std::round(size.x);
size.y = std::round(size.y);
if (stretchFlags & ITEM_LEFT)
tl.x = br.x - size.x;
else if (stretchFlags & ITEM_RIGHT)
br.x = tl.x + size.x;
if (stretchFlags & ITEM_TOP)
tl.y = br.y - size.y;
else if (stretchFlags & ITEM_BOTTOM)
br.y = tl.y + size.y;
}
void OBSBasicPreview::SnapStretchingToScreen(vec3 &tl, vec3 &br)
{
uint32_t stretchFlags = (uint32_t)stretchHandle;
vec3 newTL = GetTransformedPos(tl.x, tl.y, itemToScreen);
vec3 newTR = GetTransformedPos(br.x, tl.y, itemToScreen);
vec3 newBL = GetTransformedPos(tl.x, br.y, itemToScreen);
vec3 newBR = GetTransformedPos(br.x, br.y, itemToScreen);
vec3 boundingTL;
vec3 boundingBR;
vec3_copy(&boundingTL, &newTL);
vec3_min(&boundingTL, &boundingTL, &newTR);
vec3_min(&boundingTL, &boundingTL, &newBL);
vec3_min(&boundingTL, &boundingTL, &newBR);
vec3_copy(&boundingBR, &newTL);
vec3_max(&boundingBR, &boundingBR, &newTR);
vec3_max(&boundingBR, &boundingBR, &newBL);
vec3_max(&boundingBR, &boundingBR, &newBR);
vec3 offset = GetSnapOffset(boundingTL, boundingBR);
vec3_add(&offset, &offset, &newTL);
vec3_transform(&offset, &offset, &screenToItem);
vec3_sub(&offset, &offset, &tl);
if (stretchFlags & ITEM_LEFT)
tl.x += offset.x;
else if (stretchFlags & ITEM_RIGHT)
br.x += offset.x;
if (stretchFlags & ITEM_TOP)
tl.y += offset.y;
else if (stretchFlags & ITEM_BOTTOM)
br.y += offset.y;
}
static float maxfunc(float x, float y)
{
return x > y ? x : y;
}
static float minfunc(float x, float y)
{
return x < y ? x : y;
}
void OBSBasicPreview::CropItem(const vec2 &pos)
{
obs_bounds_type boundsType = obs_sceneitem_get_bounds_type(stretchItem);
uint32_t stretchFlags = (uint32_t)stretchHandle;
uint32_t align = obs_sceneitem_get_alignment(stretchItem);
vec3 tl, br, pos3;
vec3_zero(&tl);
vec3_set(&br, stretchItemSize.x, stretchItemSize.y, 0.0f);
vec3_set(&pos3, pos.x, pos.y, 0.0f);
vec3_transform(&pos3, &pos3, &screenToItem);
obs_sceneitem_crop crop = startCrop;
vec2 scale;
obs_sceneitem_get_scale(stretchItem, &scale);
vec2 max_tl;
vec2 max_br;
vec2_set(&max_tl, float(-crop.left) * scale.x,
float(-crop.top) * scale.y);
vec2_set(&max_br, stretchItemSize.x + crop.right * scale.x,
stretchItemSize.y + crop.bottom * scale.y);
typedef std::function<float(float, float)> minmax_func_t;
minmax_func_t min_x = scale.x < 0.0f ? maxfunc : minfunc;
minmax_func_t min_y = scale.y < 0.0f ? maxfunc : minfunc;
minmax_func_t max_x = scale.x < 0.0f ? minfunc : maxfunc;
minmax_func_t max_y = scale.y < 0.0f ? minfunc : maxfunc;
pos3.x = min_x(pos3.x, max_br.x);
pos3.x = max_x(pos3.x, max_tl.x);
pos3.y = min_y(pos3.y, max_br.y);
pos3.y = max_y(pos3.y, max_tl.y);
if (stretchFlags & ITEM_LEFT) {
float maxX = stretchItemSize.x - (2.0 * scale.x);
pos3.x = tl.x = min_x(pos3.x, maxX);
} else if (stretchFlags & ITEM_RIGHT) {
float minX = (2.0 * scale.x);
pos3.x = br.x = max_x(pos3.x, minX);
}
if (stretchFlags & ITEM_TOP) {
float maxY = stretchItemSize.y - (2.0 * scale.y);
pos3.y = tl.y = min_y(pos3.y, maxY);
} else if (stretchFlags & ITEM_BOTTOM) {
float minY = (2.0 * scale.y);
pos3.y = br.y = max_y(pos3.y, minY);
}
#define ALIGN_X (ITEM_LEFT | ITEM_RIGHT)
#define ALIGN_Y (ITEM_TOP | ITEM_BOTTOM)
vec3 newPos;
vec3_zero(&newPos);
uint32_t align_x = (align & ALIGN_X);
uint32_t align_y = (align & ALIGN_Y);
if (align_x == (stretchFlags & ALIGN_X) && align_x != 0)
newPos.x = pos3.x;
else if (align & ITEM_RIGHT)
newPos.x = stretchItemSize.x;
else if (!(align & ITEM_LEFT))
newPos.x = stretchItemSize.x * 0.5f;
if (align_y == (stretchFlags & ALIGN_Y) && align_y != 0)
newPos.y = pos3.y;
else if (align & ITEM_BOTTOM)
newPos.y = stretchItemSize.y;
else if (!(align & ITEM_TOP))
newPos.y = stretchItemSize.y * 0.5f;
#undef ALIGN_X
#undef ALIGN_Y
crop = startCrop;
if (stretchFlags & ITEM_LEFT)
crop.left += int(std::round(tl.x / scale.x));
else if (stretchFlags & ITEM_RIGHT)
crop.right +=
int(std::round((stretchItemSize.x - br.x) / scale.x));
if (stretchFlags & ITEM_TOP)
crop.top += int(std::round(tl.y / scale.y));
else if (stretchFlags & ITEM_BOTTOM)
crop.bottom +=
int(std::round((stretchItemSize.y - br.y) / scale.y));
vec3_transform(&newPos, &newPos, &itemToScreen);
newPos.x = std::round(newPos.x);
newPos.y = std::round(newPos.y);
#if 0
vec3 curPos;
vec3_zero(&curPos);
obs_sceneitem_get_pos(stretchItem, (vec2*)&curPos);
blog(LOG_DEBUG, "curPos {%d, %d} - newPos {%d, %d}",
int(curPos.x), int(curPos.y),
int(newPos.x), int(newPos.y));
blog(LOG_DEBUG, "crop {%d, %d, %d, %d}",
crop.left, crop.top,
crop.right, crop.bottom);
#endif
obs_sceneitem_defer_update_begin(stretchItem);
obs_sceneitem_set_crop(stretchItem, &crop);
if (boundsType == OBS_BOUNDS_NONE)
obs_sceneitem_set_pos(stretchItem, (vec2 *)&newPos);
obs_sceneitem_defer_update_end(stretchItem);
}
void OBSBasicPreview::StretchItem(const vec2 &pos)
{
Qt::KeyboardModifiers modifiers = QGuiApplication::keyboardModifiers();
obs_bounds_type boundsType = obs_sceneitem_get_bounds_type(stretchItem);
uint32_t stretchFlags = (uint32_t)stretchHandle;
bool shiftDown = (modifiers & Qt::ShiftModifier);
vec3 tl, br, pos3;
vec3_zero(&tl);
vec3_set(&br, stretchItemSize.x, stretchItemSize.y, 0.0f);
vec3_set(&pos3, pos.x, pos.y, 0.0f);
vec3_transform(&pos3, &pos3, &screenToItem);
if (stretchFlags & ITEM_LEFT)
tl.x = pos3.x;
else if (stretchFlags & ITEM_RIGHT)
br.x = pos3.x;
if (stretchFlags & ITEM_TOP)
tl.y = pos3.y;
else if (stretchFlags & ITEM_BOTTOM)
br.y = pos3.y;
if (!(modifiers & Qt::ControlModifier))
SnapStretchingToScreen(tl, br);
obs_source_t *source = obs_sceneitem_get_source(stretchItem);
vec2 baseSize;
vec2_set(&baseSize, float(obs_source_get_width(source)),
float(obs_source_get_height(source)));
vec2 size;
vec2_set(&size, br.x - tl.x, br.y - tl.y);
if (boundsType != OBS_BOUNDS_NONE) {
if (shiftDown)
ClampAspect(tl, br, size, baseSize);
if (tl.x > br.x)
std::swap(tl.x, br.x);
if (tl.y > br.y)
std::swap(tl.y, br.y);
vec2_abs(&size, &size);
obs_sceneitem_set_bounds(stretchItem, &size);
} else {
obs_sceneitem_crop crop;
obs_sceneitem_get_crop(stretchItem, &crop);
baseSize.x -= float(crop.left + crop.right);
baseSize.y -= float(crop.top + crop.bottom);
if (!shiftDown)
ClampAspect(tl, br, size, baseSize);
vec2_div(&size, &size, &baseSize);
obs_sceneitem_set_scale(stretchItem, &size);
}
pos3 = CalculateStretchPos(tl, br);
vec3_transform(&pos3, &pos3, &itemToScreen);
vec2 newPos;
vec2_set(&newPos, std::round(pos3.x), std::round(pos3.y));
obs_sceneitem_set_pos(stretchItem, &newPos);
}
void OBSBasicPreview::mouseMoveEvent(QMouseEvent *event)
{
changed = true;
if (scrollMode && event->buttons() == Qt::LeftButton) {
scrollingOffset.x += event->x() - scrollingFrom.x;
scrollingOffset.y += event->y() - scrollingFrom.y;
scrollingFrom.x = event->x();
scrollingFrom.y = event->y();
emit DisplayResized();
return;
}
if (locked)
return;
bool updateCursor = false;
if (mouseDown) {
vec2 pos = GetMouseEventPos(event);
if (!mouseMoved && !mouseOverItems &&
stretchHandle == ItemHandle::None) {
ProcessClick(startPos);
mouseOverItems = SelectedAtPos(startPos);
}
pos.x = std::round(pos.x);
pos.y = std::round(pos.y);
if (stretchHandle != ItemHandle::None) {
selectionBox = false;
OBSBasic *main = reinterpret_cast<OBSBasic *>(
App()->GetMainWindow());
OBSScene scene = main->GetCurrentScene();
obs_sceneitem_t *group =
obs_sceneitem_get_group(scene, stretchItem);
if (group) {
vec3 group_pos;
vec3_set(&group_pos, pos.x, pos.y, 0.0f);
vec3_transform(&group_pos, &group_pos,
&invGroupTransform);
pos.x = group_pos.x;
pos.y = group_pos.y;
}
if (cropping)
CropItem(pos);
else
StretchItem(pos);
} else if (mouseOverItems) {
if (cursor().shape() != Qt::SizeAllCursor)
setCursor(Qt::SizeAllCursor);
selectionBox = false;
MoveItems(pos);
} else {
selectionBox = true;
if (!mouseMoved)
DoSelect(startPos);
BoxItems(startPos, pos);
}
mouseMoved = true;
mousePos = pos;
} else {
vec2 pos = GetMouseEventPos(event);
OBSSceneItem item = GetItemAtPos(pos, true);
std::lock_guard<std::mutex> lock(selectMutex);
hoveredPreviewItems.clear();
hoveredPreviewItems.push_back(item);
if (!mouseMoved && hoveredPreviewItems.size() > 0) {
mousePos = pos;
OBSBasic *main = reinterpret_cast<OBSBasic *>(
App()->GetMainWindow());
float scale = main->devicePixelRatioF();
float x = float(event->x()) - main->previewX / scale;
float y = float(event->y()) - main->previewY / scale;
vec2_set(&startPos, x, y);
updateCursor = true;
}
}
if (updateCursor) {
GetStretchHandleData(startPos, true);
uint32_t stretchFlags = (uint32_t)stretchHandle;
UpdateCursor(stretchFlags);
}
}
void OBSBasicPreview::leaveEvent(QEvent *)
{
std::lock_guard<std::mutex> lock(selectMutex);
if (!selectionBox)
hoveredPreviewItems.clear();
}
static void DrawSquareAtPos(float x, float y)
{
struct vec3 pos;
vec3_set(&pos, x, y, 0.0f);
struct matrix4 matrix;
gs_matrix_get(&matrix);
vec3_transform(&pos, &pos, &matrix);
gs_matrix_push();
gs_matrix_identity();
gs_matrix_translate(&pos);
gs_matrix_translate3f(-HANDLE_RADIUS, -HANDLE_RADIUS, 0.0f);
gs_matrix_scale3f(HANDLE_RADIUS * 2, HANDLE_RADIUS * 2, 1.0f);
gs_draw(GS_TRISTRIP, 0, 0);
gs_matrix_pop();
}
static void DrawLine(float x1, float y1, float x2, float y2, float thickness,
vec2 scale)
{
float ySide = (y1 == y2) ? (y1 < 0.5f ? 1.0f : -1.0f) : 0.0f;
float xSide = (x1 == x2) ? (x1 < 0.5f ? 1.0f : -1.0f) : 0.0f;
gs_render_start(true);
gs_vertex2f(x1, y1);
gs_vertex2f(x1 + (xSide * (thickness / scale.x)),
y1 + (ySide * (thickness / scale.y)));
gs_vertex2f(x2, y2);
gs_vertex2f(x2 + (xSide * (thickness / scale.x)),
y2 + (ySide * (thickness / scale.y)));
gs_vertbuffer_t *line = gs_render_save();
gs_load_vertexbuffer(line);
gs_draw(GS_TRISTRIP, 0, 0);
gs_vertexbuffer_destroy(line);
}
static void DrawRect(float thickness, vec2 scale)
{
gs_render_start(true);
gs_vertex2f(0.0f, 0.0f);
gs_vertex2f(0.0f + (thickness / scale.x), 0.0f);
gs_vertex2f(0.0f, 1.0f);
gs_vertex2f(0.0f + (thickness / scale.x), 1.0f);
gs_vertex2f(0.0f, 1.0f - (thickness / scale.y));
gs_vertex2f(1.0f, 1.0f);
gs_vertex2f(1.0f, 1.0f - (thickness / scale.y));
gs_vertex2f(1.0f - (thickness / scale.x), 1.0f);
gs_vertex2f(1.0f, 0.0f);
gs_vertex2f(1.0f - (thickness / scale.x), 0.0f);
gs_vertex2f(1.0f, 0.0f + (thickness / scale.y));
gs_vertex2f(0.0f, 0.0f);
gs_vertex2f(0.0f, 0.0f + (thickness / scale.y));
gs_vertbuffer_t *rect = gs_render_save();
gs_load_vertexbuffer(rect);
gs_draw(GS_TRISTRIP, 0, 0);
gs_vertexbuffer_destroy(rect);
}
static inline bool crop_enabled(const obs_sceneitem_crop *crop)
{
return crop->left > 0 || crop->top > 0 || crop->right > 0 ||
crop->bottom > 0;
}
bool OBSBasicPreview::DrawSelectedOverflow(obs_scene_t *scene,
obs_sceneitem_t *item, void *param)
{
if (obs_sceneitem_locked(item))
return true;
if (!SceneItemHasVideo(item))
return true;
bool select = config_get_bool(GetGlobalConfig(), "BasicWindow",
"OverflowSelectionHidden");
if (!select && !obs_sceneitem_visible(item))
return true;
if (obs_sceneitem_is_group(item)) {
matrix4 mat;
obs_sceneitem_get_draw_transform(item, &mat);
gs_matrix_push();
gs_matrix_mul(&mat);
obs_sceneitem_group_enum_items(item, DrawSelectedOverflow,
param);
gs_matrix_pop();
}
bool always = config_get_bool(GetGlobalConfig(), "BasicWindow",
"OverflowAlwaysVisible");
if (!always && !obs_sceneitem_selected(item))
return true;
OBSBasicPreview *prev = reinterpret_cast<OBSBasicPreview *>(param);
matrix4 boxTransform;
matrix4 invBoxTransform;
obs_sceneitem_get_box_transform(item, &boxTransform);
matrix4_inv(&invBoxTransform, &boxTransform);
vec3 bounds[] = {
{{{0.f, 0.f, 0.f}}},
{{{1.f, 0.f, 0.f}}},
{{{0.f, 1.f, 0.f}}},
{{{1.f, 1.f, 0.f}}},
};
bool visible = std::all_of(
std::begin(bounds), std::end(bounds), [&](const vec3 &b) {
vec3 pos;
vec3_transform(&pos, &b, &boxTransform);
vec3_transform(&pos, &pos, &invBoxTransform);
return CloseFloat(pos.x, b.x) && CloseFloat(pos.y, b.y);
});
if (!visible)
return true;
GS_DEBUG_MARKER_BEGIN(GS_DEBUG_COLOR_DEFAULT, "DrawSelectedOverflow");
obs_transform_info info;
obs_sceneitem_get_info(item, &info);
gs_effect_t *solid = obs_get_base_effect(OBS_EFFECT_REPEAT);
gs_eparam_t *image = gs_effect_get_param_by_name(solid, "image");
gs_eparam_t *scale = gs_effect_get_param_by_name(solid, "scale");
vec2 s;
vec2_set(&s, boxTransform.x.x / 96, boxTransform.y.y / 96);
gs_effect_set_vec2(scale, &s);
gs_effect_set_texture(image, prev->overflow);
gs_matrix_push();
gs_matrix_mul(&boxTransform);
obs_sceneitem_crop crop;
obs_sceneitem_get_crop(item, &crop);
while (gs_effect_loop(solid, "Draw")) {
gs_draw_sprite(prev->overflow, 0, 1, 1);
}
gs_matrix_pop();
GS_DEBUG_MARKER_END();
UNUSED_PARAMETER(scene);
return true;
}
bool OBSBasicPreview::DrawSelectedItem(obs_scene_t *scene,
obs_sceneitem_t *item, void *param)
{
if (obs_sceneitem_locked(item))
return true;
if (!SceneItemHasVideo(item))
return true;
if (obs_sceneitem_is_group(item)) {
matrix4 mat;
obs_sceneitem_get_draw_transform(item, &mat);
gs_matrix_push();
gs_matrix_mul(&mat);
obs_sceneitem_group_enum_items(item, DrawSelectedItem, param);
gs_matrix_pop();
}
OBSBasicPreview *prev = reinterpret_cast<OBSBasicPreview *>(param);
OBSBasic *main = OBSBasic::Get();
bool hovered = false;
{
std::lock_guard<std::mutex> lock(prev->selectMutex);
for (size_t i = 0; i < prev->hoveredPreviewItems.size(); i++) {
if (prev->hoveredPreviewItems[i] == item) {
hovered = true;
break;
}
}
}
bool selected = obs_sceneitem_selected(item);
if (!selected && !hovered)
return true;
matrix4 boxTransform;
matrix4 invBoxTransform;
obs_sceneitem_get_box_transform(item, &boxTransform);
matrix4_inv(&invBoxTransform, &boxTransform);
vec3 bounds[] = {
{{{0.f, 0.f, 0.f}}},
{{{1.f, 0.f, 0.f}}},
{{{0.f, 1.f, 0.f}}},
{{{1.f, 1.f, 0.f}}},
};
vec4 red;
vec4 green;
vec4 blue;
vec4_set(&red, 1.0f, 0.0f, 0.0f, 1.0f);
vec4_set(&green, 0.0f, 1.0f, 0.0f, 1.0f);
vec4_set(&blue, 0.0f, 0.5f, 1.0f, 1.0f);
bool visible = std::all_of(
std::begin(bounds), std::end(bounds), [&](const vec3 &b) {
vec3 pos;
vec3_transform(&pos, &b, &boxTransform);
vec3_transform(&pos, &pos, &invBoxTransform);
return CloseFloat(pos.x, b.x) && CloseFloat(pos.y, b.y);
});
if (!visible)
return true;
GS_DEBUG_MARKER_BEGIN(GS_DEBUG_COLOR_DEFAULT, "DrawSelectedItem");
matrix4 curTransform;
vec2 boxScale;
gs_matrix_get(&curTransform);
obs_sceneitem_get_box_scale(item, &boxScale);
boxScale.x *= curTransform.x.x;
boxScale.y *= curTransform.y.y;
obs_transform_info info;
obs_sceneitem_get_info(item, &info);
gs_matrix_push();
gs_matrix_mul(&boxTransform);
obs_sceneitem_crop crop;
obs_sceneitem_get_crop(item, &crop);
gs_effect_t *eff = gs_get_effect();
gs_eparam_t *colParam = gs_effect_get_param_by_name(eff, "color");
if (info.bounds_type == OBS_BOUNDS_NONE && crop_enabled(&crop)) {
#define DRAW_SIDE(side, x1, y1, x2, y2) \
if (hovered && !selected) \
gs_effect_set_vec4(colParam, &blue); \
else if (crop.side > 0) \
gs_effect_set_vec4(colParam, &green); \
DrawLine(x1, y1, x2, y2, HANDLE_RADIUS / 2, boxScale); \
gs_effect_set_vec4(colParam, &red);
DRAW_SIDE(left, 0.0f, 0.0f, 0.0f, 1.0f);
DRAW_SIDE(top, 0.0f, 0.0f, 1.0f, 0.0f);
DRAW_SIDE(right, 1.0f, 0.0f, 1.0f, 1.0f);
DRAW_SIDE(bottom, 0.0f, 1.0f, 1.0f, 1.0f);
#undef DRAW_SIDE
} else {
if (!selected) {
gs_effect_set_vec4(colParam, &blue);
DrawRect(HANDLE_RADIUS / 2, boxScale);
} else {
DrawRect(HANDLE_RADIUS / 2, boxScale);
}
}
gs_load_vertexbuffer(main->box);
gs_effect_set_vec4(colParam, &red);
if (selected) {
DrawSquareAtPos(0.0f, 0.0f);
DrawSquareAtPos(0.0f, 1.0f);
DrawSquareAtPos(1.0f, 0.0f);
DrawSquareAtPos(1.0f, 1.0f);
DrawSquareAtPos(0.5f, 0.0f);
DrawSquareAtPos(0.0f, 0.5f);
DrawSquareAtPos(0.5f, 1.0f);
DrawSquareAtPos(1.0f, 0.5f);
}
gs_matrix_pop();
GS_DEBUG_MARKER_END();
UNUSED_PARAMETER(scene);
UNUSED_PARAMETER(param);
return true;
}
bool OBSBasicPreview::DrawSelectionBox(float x1, float y1, float x2, float y2,
gs_vertbuffer_t *rectFill)
{
x1 = std::round(x1);
x2 = std::round(x2);
y1 = std::round(y1);
y2 = std::round(y2);
gs_effect_t *eff = gs_get_effect();
gs_eparam_t *colParam = gs_effect_get_param_by_name(eff, "color");
vec4 fillColor;
vec4_set(&fillColor, 0.7f, 0.7f, 0.7f, 0.5f);
vec4 borderColor;
vec4_set(&borderColor, 1.0f, 1.0f, 1.0f, 1.0f);
vec2 scale;
vec2_set(&scale, std::abs(x2 - x1), std::abs(y2 - y1));
gs_matrix_push();
gs_matrix_identity();
gs_matrix_translate3f(x1, y1, 0.0f);
gs_matrix_scale3f(x2 - x1, y2 - y1, 1.0f);
gs_effect_set_vec4(colParam, &fillColor);
gs_load_vertexbuffer(rectFill);
gs_draw(GS_TRISTRIP, 0, 0);
gs_effect_set_vec4(colParam, &borderColor);
DrawRect(HANDLE_RADIUS / 2, scale);
gs_matrix_pop();
return true;
}
void OBSBasicPreview::DrawOverflow()
{
if (locked)
return;
bool hidden = config_get_bool(GetGlobalConfig(), "BasicWindow",
"OverflowHidden");
if (hidden)
return;
GS_DEBUG_MARKER_BEGIN(GS_DEBUG_COLOR_DEFAULT, "DrawOverflow");
if (!overflow) {
std::string path;
GetDataFilePath("images/overflow.png", path);
overflow = gs_texture_create_from_file(path.c_str());
}
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
OBSScene scene = main->GetCurrentScene();
if (scene) {
gs_matrix_push();
gs_matrix_scale3f(main->previewScale, main->previewScale, 1.0f);
obs_scene_enum_items(scene, DrawSelectedOverflow, this);
gs_matrix_pop();
}
gs_load_vertexbuffer(nullptr);
GS_DEBUG_MARKER_END();
}
void OBSBasicPreview::DrawSceneEditing()
{
if (locked)
return;
GS_DEBUG_MARKER_BEGIN(GS_DEBUG_COLOR_DEFAULT, "DrawSceneEditing");
OBSBasic *main = reinterpret_cast<OBSBasic *>(App()->GetMainWindow());
gs_effect_t *solid = obs_get_base_effect(OBS_EFFECT_SOLID);
gs_technique_t *tech = gs_effect_get_technique(solid, "Solid");
vec4 color;
vec4_set(&color, 1.0f, 0.0f, 0.0f, 1.0f);
gs_effect_set_vec4(gs_effect_get_param_by_name(solid, "color"), &color);
gs_technique_begin(tech);
gs_technique_begin_pass(tech, 0);
OBSScene scene = main->GetCurrentScene();
if (scene) {
gs_matrix_push();
gs_matrix_scale3f(main->previewScale, main->previewScale, 1.0f);
obs_scene_enum_items(scene, DrawSelectedItem, this);
gs_matrix_pop();
}
if (selectionBox) {
if (!rectFill) {
gs_render_start(true);
gs_vertex2f(0.0f, 0.0f);
gs_vertex2f(1.0f, 0.0f);
gs_vertex2f(0.0f, 1.0f);
gs_vertex2f(1.0f, 1.0f);
rectFill = gs_render_save();
}
DrawSelectionBox(startPos.x * main->previewScale,
startPos.y * main->previewScale,
mousePos.x * main->previewScale,
mousePos.y * main->previewScale, rectFill);
}
gs_load_vertexbuffer(nullptr);
gs_technique_end_pass(tech);
gs_technique_end(tech);
GS_DEBUG_MARKER_END();
}
void OBSBasicPreview::ResetScrollingOffset()
{
vec2_zero(&scrollingOffset);
}
void OBSBasicPreview::SetScalingLevel(int32_t newScalingLevelVal)
{
float newScalingAmountVal =
pow(ZOOM_SENSITIVITY, float(newScalingLevelVal));
scalingLevel = newScalingLevelVal;
SetScalingAmount(newScalingAmountVal);
}
void OBSBasicPreview::SetScalingAmount(float newScalingAmountVal)
{
scrollingOffset.x *= newScalingAmountVal / scalingAmount;
scrollingOffset.y *= newScalingAmountVal / scalingAmount;
scalingAmount = newScalingAmountVal;
}
OBSBasicPreview *OBSBasicPreview::Get()
{
return OBSBasic::Get()->ui->preview;
}
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