bool
TaskContourGL::run(RunParams & /* params */) const
{
gl::Context::Lock lock(env().context);
SurfaceGL::Handle target =
SurfaceGL::Handle::cast_dynamic(target_surface);
// transformation
Vector rect_size = get_source_rect_rb() - get_source_rect_lt();
Matrix bounds_transfromation;
bounds_transfromation.m00 = fabs(rect_size[0]) > 1e-10 ? 2.0/rect_size[0] : 0.0;
bounds_transfromation.m11 = fabs(rect_size[1]) > 1e-10 ? 2.0/rect_size[1] : 0.0;
bounds_transfromation.m20 = -1.0 - get_source_rect_lt()[0]*bounds_transfromation.m00;
bounds_transfromation.m21 = -1.0 - get_source_rect_lt()[1]*bounds_transfromation.m11;
Matrix matrix = transformation * bounds_transfromation;
if (valid_target())
{
// check bounds
std::vector<Vector> polygon;
Rect bounds(-1.0, -1.0, 1.0, 1.0);
Vector pixel_size(
2.0/(Real)(get_target_rect().maxx - get_target_rect().minx),
2.0/(Real)(get_target_rect().maxy - get_target_rect().miny) );
contour->split(polygon, bounds, matrix, pixel_size);
// bind framebuffer
gl::Framebuffers::RenderbufferLock renderbuffer = env().framebuffers.get_renderbuffer(GL_STENCIL_INDEX8, target->get_width(), target->get_height());
gl::Framebuffers::FramebufferLock framebuffer = env().framebuffers.get_framebuffer();
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer.get_id());
glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, renderbuffer.get_id());
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, target->get_id(), 0);
env().framebuffers.check("TaskContourGL::run bind framebuffer");
glViewport(
get_target_rect().minx,
get_target_rect().miny,
get_target_rect().maxx - get_target_rect().minx,
get_target_rect().maxy - get_target_rect().miny );
env().context.check("TaskContourGL::run viewport");
// render
render_polygon(
polygon,
bounds,
contour->invert,
contour->antialias,
contour->winding_style,
contour->color );
// release framebuffer
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
env().context.check("TaskContourGL::run release contour");
}
return true;
}
bool
TaskSurfaceResampleGL::run(RunParams & /* params */) const
{
gl::Context::Lock lock(env().context);
SurfaceGL::Handle a =
SurfaceGL::Handle::cast_dynamic(sub_task()->target_surface);
SurfaceGL::Handle target =
SurfaceGL::Handle::cast_dynamic(target_surface);
// TODO: gamma
Vector rect_size = get_source_rect_rb() - get_source_rect_lt();
Matrix bounds_transfromation;
bounds_transfromation.m00 = fabs(rect_size[0]) > 1e-10 ? 2.0/rect_size[0] : 0.0;
bounds_transfromation.m11 = fabs(rect_size[1]) > 1e-10 ? 2.0/rect_size[1] : 0.0;
bounds_transfromation.m20 = -1.0 - get_source_rect_lt()[0] * bounds_transfromation.m00;
bounds_transfromation.m21 = -1.0 - get_source_rect_lt()[1] * bounds_transfromation.m11;
Matrix matrix = transformation * bounds_transfromation;
// prepare arrays
Vector k(target->get_width(), target->get_height());
Vector d( matrix.get_axis_x().multiply_coords(k).norm().divide_coords(k).mag() / matrix.get_axis_x().mag(),
matrix.get_axis_y().multiply_coords(k).norm().divide_coords(k).mag() / matrix.get_axis_y().mag() );
d *= 4.0;
Vector coords[4][3];
for(int i = 0; i < 4; ++i)
{
coords[i][2] = Vector(i%2 ? 1.0 : -1.0, i/2 ? 1.0 : -1.0).multiply_coords(Vector(1.0, 1.0) + d);
coords[i][0] = matrix.get_transformed(coords[i][2]*0.5 + Vector(0.5, 0.5));
coords[i][1] = (coords[i][2] + Vector(1.0, 1.0))*0.5;
}
Vector aascale = d.one_divide_coords();
gl::Framebuffers::FramebufferLock framebuffer = env().framebuffers.get_framebuffer();
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, framebuffer.get_id());
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, target->get_id(), 0);
glViewport(
get_target_rect().minx,
get_target_rect().miny,
get_target_rect().maxx - get_target_rect().minx,
get_target_rect().maxy - get_target_rect().miny );
env().context.check();
glBindTexture(GL_TEXTURE_2D, a->get_id());
glBindSampler(0, env().samplers.get_interpolation(interpolation));
env().context.check();
gl::Buffers::BufferLock buf = env().buffers.get_array_buffer(coords);
gl::Buffers::VertexArrayLock va = env().buffers.get_vertex_array();
env().context.check();
glBindVertexArray(va.get_id());
glBindBuffer(GL_ARRAY_BUFFER, buf.get_id());
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glEnableVertexAttribArray(2);
glVertexAttribPointer(0, 2, GL_DOUBLE, GL_TRUE, sizeof(coords[0]), (const char*)buf.get_pointer() + 0*sizeof(coords[0][0]));
glVertexAttribPointer(1, 2, GL_DOUBLE, GL_TRUE, sizeof(coords[0]), (const char*)buf.get_pointer() + 1*sizeof(coords[0][0]));
glVertexAttribPointer(2, 2, GL_DOUBLE, GL_TRUE, sizeof(coords[0]), (const char*)buf.get_pointer() + 2*sizeof(coords[0][0]));
glBindBuffer(GL_ARRAY_BUFFER, 0);
env().context.check();
env().shaders.antialiased_textured_rect(interpolation, aascale);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
env().context.check();
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
glDisableVertexAttribArray(2);
glBindVertexArray(0);
env().context.check();
glBindSampler(0, 0);
glBindTexture(GL_TEXTURE_2D, 0);
env().context.check();
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
env().context.check();
return true;
}