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added chroma key

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This commit is contained in:
itsmattkc
2018-11-18 02:22:11 +11:00
parent fcfc685ebe
commit 456103df2f
8 changed files with 79 additions and 15 deletions
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effects/chromakey.frag
+55
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@@ -0,0 +1,55 @@
/*a fast implementation of the chromakey program
(c) 2008 Edward Cannon (adapted to GLSL by Olive Team)
feel free to use or modify at will*/
/*the follwing three functions convert RGB into YCbCr in the same manner as in JPEG images*/
uniform sampler2D tex;
varying vec2 vTexCoord;
uniform vec3 key_color;
uniform float tola;
uniform float tolb;
uniform bool opt;
float rgb2y (vec3 c) {
/*a utility function to convert colors in RGB into YCbCr*/
return (0.299*c.r + 0.587*c.g + 0.114*c.b);
}
float rgb2cb (vec3 c) {
/*a utility function to convert colors in RGB into YCbCr*/
return (0.5 + -0.168736*c.r - 0.331264*c.g + 0.5*c.b);
}
float rgb2cr (vec3 c) {
/*a utility function to convert colors in RGB into YCbCr*/
return (0.5 + 0.5*c.r - 0.418688*c.g - 0.081312*c.b);
}
float colorclose(float Cb_p,float Cr_p,float Cb_key,float Cr_key,float tola,float tolb) {
/*decides if a color is close to the specified hue*/
float temp = sqrt(((Cb_key-Cb_p)*(Cb_key-Cb_p))+((Cr_key-Cr_p)*(Cr_key-Cr_p)));
if (temp < tola) {return (0.0);}
if (temp < tolb) {return ((temp-tola)/(tolb-tola));}
return (1.0);
}
void main(void) {
float cb_key = rgb2cb(key_color);
float cr_key = rgb2cr(key_color);
vec4 texture_color = texture2D(tex, vTexCoord);
float cb = rgb2cb(texture_color.rgb);
float cr = rgb2cr(texture_color.rgb);
float mask = colorclose(cb, cr, cb_key, cr_key, (tola/100.0), (tolb/100.0));
float submask = 1.0-mask;
texture_color.r = max(texture_color.r - submask*key_color.r, 0.0) + submask;
texture_color.g = max(texture_color.g - submask*key_color.g, 0.0) + submask;
texture_color.b = max(texture_color.b - submask*key_color.b, 0.0) + submask;
texture_color.a *= mask;
gl_FragColor = texture_color;
}
effects/chromakey.xml
+13
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@@ -0,0 +1,13 @@
<?xml version="1.0" encoding="UTF-8"?>
<effect name="Chroma Key" category="Keying">
<row name="Key Color">
<field type="color" r="0" g="255" b="0" id="key_color"/>
</row>
<row name="Lower Tolerance">
<field type="double" min="0" default="5" max="100" id="tola"/>
</row>
<row name="Upper Tolerance">
<field type="double" min="0" default="25" max="100" id="tolb"/>
</row>
<shader vert="common.vert" frag="chromakey.frag"/>
</effect>
effects/common.frag
+1 -1
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@@ -4,6 +4,6 @@ uniform sampler2D tex;
varying vec2 vTexCoord;
void main(void) {
vec4 textureColor = texture2D(tex, vec2(vTexCoord.x, vTexCoord.y));
vec4 textureColor = texture2D(tex, vTexCoord);
gl_FragColor = textureColor;
}
project/effect.cpp
+1 -1
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@@ -781,7 +781,7 @@ void Effect::process_shader(double timecode, GLTextureCoords&) {
glslProgram->setUniformValue(field->id.toLatin1().constData(), (GLfloat) field->get_double_value(timecode));
break;
case EFFECT_FIELD_COLOR:
glslProgram->setUniformValue(field->id.toLatin1().constData(), field->get_color_value(timecode));
glslProgram->setUniformValue(field->id.toLatin1().constData(), field->get_color_value(timecode).redF(), field->get_color_value(timecode).greenF(), field->get_color_value(timecode).blueF());
break;
case EFFECT_FIELD_STRING: break; // can you even send a string to a uniform value?
case EFFECT_FIELD_BOOL:
project/undo.cpp
-3
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@@ -116,10 +116,7 @@ void DeleteClipAction::redo() {
// remove ref to clip
ref = seq->clips.at(index);
if (ref->open) {
dout << "closing clip before deleting";
close_clip(ref);
if (ref->multithreaded) ref->cacher->wait();
dout << "FINISHED closing clip before deleting";
}
seq->clips[index] = NULL;
ui/timelinewidget.cpp
+7 -8
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@@ -324,7 +324,7 @@ void TimelineWidget::dragEnterEvent(QDragEnterEvent *event) {
void TimelineWidget::dragMoveEvent(QDragMoveEvent *event) {
if (sequence != NULL && panel_timeline->importing) {
QPoint pos = event->pos();
update_ghosts(pos);
update_ghosts(pos, event->keyboardModifiers() & Qt::ShiftModifier);
panel_timeline->move_insert = ((event->keyboardModifiers() & Qt::ControlModifier) && (panel_timeline->tool == TIMELINE_TOOL_POINTER || panel_timeline->importing));
update_ui(false);
}
@@ -1101,9 +1101,9 @@ void TimelineWidget::init_ghosts() {
}
}
void TimelineWidget::update_ghosts(const QPoint& mouse_pos) {
int mouse_track = getTrackFromScreenPoint(mouse_pos.y());
long frame_diff = panel_timeline->getTimelineFrameFromScreenPoint(mouse_pos.x()) - panel_timeline->drag_frame_start;
void TimelineWidget::update_ghosts(const QPoint& mouse_pos, bool lock_frame) {
int mouse_track = getTrackFromScreenPoint(mouse_pos.y());
long frame_diff = (lock_frame) ? 0 : panel_timeline->getTimelineFrameFromScreenPoint(mouse_pos.x()) - panel_timeline->drag_frame_start;
int track_diff = ((panel_timeline->tool == TIMELINE_TOOL_SLIDE || panel_timeline->transition_select != TA_NO_TRANSITION) && !panel_timeline->importing) ? 0 : mouse_track - panel_timeline->drag_track_start;
long validator;
long earliest_in_point = LONG_MAX;
@@ -1411,7 +1411,7 @@ void TimelineWidget::mouseMoveEvent(QMouseEvent *event) {
if (sequence != NULL) {
bool alt = (event->modifiers() & Qt::AltModifier);
panel_timeline->cursor_frame = panel_timeline->getTimelineFrameFromScreenPoint(event->pos().x());
panel_timeline->cursor_frame = panel_timeline->getTimelineFrameFromScreenPoint(event->pos().x());
panel_timeline->cursor_track = getTrackFromScreenPoint(event->pos().y());
panel_timeline->move_insert = ((event->modifiers() & Qt::ControlModifier) && (panel_timeline->tool == TIMELINE_TOOL_POINTER || panel_timeline->importing || panel_timeline->creating));
@@ -1491,8 +1491,7 @@ void TimelineWidget::mouseMoveEvent(QMouseEvent *event) {
panel_timeline->calculate_track_height(track_target, new_height);
update();
} else if (panel_timeline->moving_proc) {
QPoint pos = event->pos();
update_ghosts(pos);
update_ghosts(event->pos(), event->modifiers() & Qt::ShiftModifier);
} else {
// set up movement
// create ghosts
@@ -1907,7 +1906,7 @@ void TimelineWidget::mouseMoveEvent(QMouseEvent *event) {
} else if (panel_timeline->tool == TIMELINE_TOOL_TRANSITION) {
if (panel_timeline->transition_tool_init) {
if (panel_timeline->transition_tool_proc) {
update_ghosts(event->pos());
update_ghosts(event->pos(), event->modifiers() & Qt::ShiftModifier);
} else {
Clip* c = sequence->clips.at(panel_timeline->transition_tool_pre_clip);
ui/timelinewidget.h
+1 -1
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@@ -46,7 +46,7 @@ protected:
void wheelEvent(QWheelEvent *event);
private:
void init_ghosts();
void update_ghosts(const QPoint &mouse_pos);
void update_ghosts(const QPoint& mouse_pos, bool lock_frame);
bool is_track_visible(int track);
int getTrackFromScreenPoint(int y);
int getScreenPointFromTrack(int track);
ui/viewerwidget.cpp
+1 -1
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@@ -352,7 +352,7 @@ GLuint ViewerWidget::compose_sequence(QVector<Clip*>& nests, bool render_audio)
int half_height = s->height/2;
if (rendering || !nests.isEmpty()) half_height = -half_height; // invert vertical
glPushMatrix();
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4f(1.0, 1.0, 1.0, 1.0);
glLoadIdentity();
glOrtho(-half_width, half_width, half_height, -half_height, -1, 1);