31 #include "../../include/effects/Shift.h"
38 init_effect_details();
45 init_effect_details();
49 void Shift::init_effect_details()
57 info.
description =
"Shift the image up, down, left, and right (with infinite wrapping).";
64 std::shared_ptr<Frame>
Shift::GetFrame(std::shared_ptr<Frame> frame, int64_t frame_number)
67 std::shared_ptr<QImage> frame_image = frame->
GetImage();
68 unsigned char *pixels = (
unsigned char *) frame_image->bits();
71 double x_shift =
x.
GetValue(frame_number);
72 double x_shift_limit = fmod(fabs(x_shift), 1.0);
73 double y_shift =
y.
GetValue(frame_number);
74 double y_shift_limit = fmod(fabs(y_shift), 1.0);
77 unsigned char *temp_row =
new unsigned char[frame_image->width() * 4]();
81 for (
int row = 0; row < frame_image->height(); row++) {
83 int starting_row_pixel = row * frame_image->width();
84 memcpy(temp_row, &pixels[starting_row_pixel * 4],
sizeof(
char) * frame_image->width() * 4);
89 int relative_pixel_start = (int)round(frame_image->width() * x_shift_limit);
90 memcpy(&pixels[(starting_row_pixel + relative_pixel_start) * 4], &temp_row[0],
sizeof(
char) * (frame_image->width() - relative_pixel_start) * 4);
93 memcpy(&pixels[starting_row_pixel * 4], &temp_row[(frame_image->width() - relative_pixel_start) * 4],
sizeof(
char) * relative_pixel_start * 4);
94 }
else if (x_shift < 0.0) {
96 int relative_pixel_start = (int)round(frame_image->width() * x_shift_limit);
97 memcpy(&pixels[starting_row_pixel * 4], &temp_row[relative_pixel_start * 4],
sizeof(
char) * (frame_image->width() - relative_pixel_start) * 4);
100 memcpy(&pixels[(starting_row_pixel + (frame_image->width() - relative_pixel_start)) * 4], &temp_row[0],
sizeof(
char) * relative_pixel_start * 4);
105 unsigned char *temp_image =
new unsigned char[frame_image->width() * frame_image->height() * 4]();
106 memcpy(temp_image, pixels,
sizeof(
char) * frame_image->width() * frame_image->height() * 4);
112 int relative_pixel_start = frame_image->width() * (int)round(frame_image->height() * y_shift_limit);
113 memcpy(&pixels[relative_pixel_start * 4], temp_image,
sizeof(
char) * ((frame_image->width() * frame_image->height()) - relative_pixel_start) * 4);
116 memcpy(pixels, &temp_image[((frame_image->width() * frame_image->height()) - relative_pixel_start) * 4],
sizeof(
char) * relative_pixel_start * 4);
118 }
else if (y_shift < 0.0) {
120 int relative_pixel_start = frame_image->width() * (int)round(frame_image->height() * y_shift_limit);
121 memcpy(pixels, &temp_image[relative_pixel_start * 4],
sizeof(
char) * ((frame_image->width() * frame_image->height()) - relative_pixel_start) * 4);
124 memcpy(&pixels[((frame_image->width() * frame_image->height()) - relative_pixel_start) * 4], temp_image,
sizeof(
char) * relative_pixel_start * 4);
165 catch (
const std::exception& e)
168 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)");
179 if (!root[
"x"].isNull())
181 if (!root[
"y"].isNull())
190 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(), NULL, -1, -1,
true, requested_frame);
191 root[
"position"] =
add_property_json(
"Position",
Position(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
193 root[
"start"] =
add_property_json(
"Start",
Start(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
194 root[
"end"] =
add_property_json(
"End",
End(),
"float",
"", NULL, 0, 1000 * 60 * 30,
false, requested_frame);
195 root[
"duration"] =
add_property_json(
"Duration",
Duration(),
"float",
"", NULL, 0, 1000 * 60 * 30,
true, requested_frame);
202 return root.toStyledString();