using namespace std;
+namespace movit {
+
PaddingEffect::PaddingEffect()
: border_color(0.0f, 0.0f, 0.0f, 0.0f),
output_width(1280),
output_height(720),
top(0),
- left(0)
+ left(0),
+ pad_from_bottom(0)
{
register_vec4("border_color", (float *)&border_color);
register_int("width", &output_width);
register_int("height", &output_height);
register_float("top", &top);
register_float("left", &left);
+ register_int("pad_from_bottom", &pad_from_bottom);
}
string PaddingEffect::output_fragment_shader()
{
Effect::set_gl_state(glsl_program_num, prefix, sampler_num);
- float offset[2] = {
- left / output_width,
- (output_height - input_height - top) / output_height
- };
+ float offset[2];
+ offset[0] = left / output_width;
+ if (pad_from_bottom) {
+ offset[1] = top / output_height;
+ } else {
+ offset[1] = (output_height - input_height - top) / output_height;
+ }
set_uniform_vec2(glsl_program_num, prefix, "offset", offset);
float scale[2] = {
input_width = width;
input_height = height;
}
+
+} // namespace movit