void
Canvas::draw_surface_batch(const SurfacePtr& surface,
std::vector<Rectf> srcrects,
std::vector<Rectf> dstrects,
std::vector<float> angles,
const Color& color,
int layer)
{
if (!surface) return;
auto request = new(m_obst) TextureRequest();
request->type = TEXTURE;
request->layer = layer;
request->flip = m_context.transform().flip ^ surface->get_flip();
request->alpha = m_context.transform().alpha;
request->color = color;
request->srcrects = std::move(srcrects);
request->dstrects = std::move(dstrects);
request->angles = std::move(angles);
for (auto& dstrect : request->dstrects)
{
dstrect = Rectf(apply_translate(dstrect.p1()), dstrect.get_size());
}
request->texture = surface->get_texture().get();
request->displacement_texture = surface->get_displacement_texture().get();
m_requests.push_back(request);
}
void
Canvas::draw_surface(const SurfacePtr& surface,
const Vector& position, float angle, const Color& color, const Blend& blend,
int layer)
{
if (!surface) return;
const auto& cliprect = m_context.get_cliprect();
// discard clipped surface
if (position.x > cliprect.get_right() ||
position.y > cliprect.get_bottom() ||
position.x + static_cast<float>(surface->get_width()) < cliprect.get_left() ||
position.y + static_cast<float>(surface->get_height()) < cliprect.get_top())
return;
auto request = new(m_obst) TextureRequest();
request->type = TEXTURE;
request->layer = layer;
request->flip = m_context.transform().flip ^ surface->get_flip();
request->alpha = m_context.transform().alpha;
request->blend = blend;
request->srcrects.emplace_back(Rectf(surface->get_region()));
request->dstrects.emplace_back(Rectf(apply_translate(position), Size(surface->get_width(), surface->get_height())));
request->angles.emplace_back(angle);
request->texture = surface->get_texture().get();
request->displacement_texture = surface->get_displacement_texture().get();
request->color = color;
m_requests.push_back(request);
}
void draw_particles()
{
glPushMatrix();
glMultMatrixf(get_modelview().matrix);
OpenGLState state;
state.bind_texture(surface->get_texture());
state.set_blend_func(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
state.enable(GL_BLEND);
state.activate();
glBegin(GL_QUADS);
for(ParticleSystem::Particles::iterator i = psys.begin(); i != psys.end(); ++i)
{
if (i->t != -1.0f)
{
float p = 1.0f - psys.get_progress(i->t);
Color color(psys.get_color_start().r * p + psys.get_color_stop().r * (1.0f - p),
psys.get_color_start().g * p + psys.get_color_stop().g * (1.0f - p),
psys.get_color_start().b * p + psys.get_color_stop().b * (1.0f - p),
psys.get_color_start().a * p + psys.get_color_stop().a * (1.0f - p));
// scale
float scale = psys.get_size_start() +
psys.get_progress(i->t) * (psys.get_size_stop() - psys.get_size_start());
float width = surface->get_width() * scale;
float height = surface->get_height() * scale;
// rotate
float x_rot = width/2;
float y_rot = height/2;
if (i->angle != 0)
{
float s = sinf(math::pi * i->angle/180.0f);
float c = cosf(math::pi * i->angle/180.0f);
x_rot = (width/2) * c - (height/2) * s;
y_rot = (width/2) * s + (height/2) * c;
}
glColor4f(color.r, color.g, color.b, color.a);
glTexCoord2f(0, 0);
glVertex2f(i->x - x_rot, i->y - y_rot);
glTexCoord2f(1, 0);
glVertex2f(i->x + y_rot, i->y - x_rot);
glTexCoord2f(1, 1);
glVertex2f(i->x + x_rot, i->y + y_rot);
glTexCoord2f(0, 1);
glVertex2f(i->x - y_rot, i->y + x_rot);
}
}
glEnd();
glPopMatrix();
}
void
Canvas::draw_surface_part(const SurfacePtr& surface, const Rectf& srcrect, const Rectf& dstrect,
int layer, const PaintStyle& style)
{
if (!surface) return;
auto request = new(m_obst) TextureRequest();
request->type = TEXTURE;
request->layer = layer;
request->flip = m_context.transform().flip ^ surface->get_flip();
request->alpha = m_context.transform().alpha * style.get_alpha();
request->blend = style.get_blend();
request->srcrects.emplace_back(srcrect);
request->dstrects.emplace_back(apply_translate(dstrect.p1()), dstrect.get_size());
request->angles.emplace_back(0.0f);
request->texture = surface->get_texture().get();
request->displacement_texture = surface->get_displacement_texture().get();
request->color = style.get_color();
m_requests.push_back(request);
}