bool Alpha::update()
{
canvas.clear(clan::Colorf(1.0f,1.0f,1.0f, 1.0f)); // White background
font.draw_text(canvas, 8, 20, "Standard Equation:", clan::Colorf::black);
font.draw_text(canvas, 8, 40, "Destination Color = AlphaSource * ColorSource + ( 1 - AlphaSource ) * ColorDestination", clan::Colorf::black);
font.draw_text(canvas, 8, 60, "Destination Alpha = AlphaSource + ( 1 - AlphaSource ) * AlphaDestination", clan::Colorf::black);
font.draw_text(canvas, 8, 100, "ColorSource = Vertex Color * Image Color", clan::Colorf::black);
font.draw_text(canvas, 8, 120, "AlphaSource = Vertex Alpha * Image Alpha", clan::Colorf::black);
int ypos = 160;
int ygap = 80;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 1.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 0.0f, 0.0f, 1.0f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 1.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 0.0f, 0.0f, 0.5f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 1.0f, 1.0f, 0.5f), clan::Colorf(1.0f, 0.0f, 0.0f, 1.0f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 1.0f, 1.0f, 0.5f), clan::Colorf(1.0f, 0.0f, 0.0f, 1.0f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(0.2f, 0.0f, 0.0f, 1.0f), clan::Colorf(0.9f, 0.0f, 0.0f, 1.0f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 0.0f, 0.0f, 0.2f), clan::Colorf(1.0f, 0.0f, 0.0f, 0.9f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 0.5f), clan::Colorf(1.0f, 1.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 0.0f, 0.0f, 0.5f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 0.5f), clan::Colorf(1.0f, 0.5f, 0.0f, 1.0f), clan::Colorf(0.0f, 0.5f, 0.0f, 1.0f));
ypos += ygap;
window.flip(1);
return !quit;
}
// The start of the Application
int Alpha::start(const std::vector<std::string> &args)
{
quit = false;
// Set the window
clan::DisplayWindowDescription desc;
desc.set_title("Standard Compositing using the Alpha Channel");
desc.set_size(clan::Size(800, 800), true);
desc.set_allow_resize(true);
clan::DisplayWindow window(desc);
// Connect the Window close event
clan::Slot slot_quit = window.sig_window_close().connect(this, &Alpha::on_window_close);
// Connect a keyboard handler to on_key_up()
clan::Slot slot_input_up = (window.get_ic().get_keyboard()).sig_key_up().connect(this, &Alpha::on_input_up);
// Get the graphic context
clan::Canvas canvas(window);
clan::BlendStateDescription blend_desc;
blend_desc.enable_blending(false);
blend_disabled = clan::BlendState(canvas, blend_desc);
blend_desc.enable_blending(true);
blend_enabled = clan::BlendState(canvas, blend_desc);
clan::Font font(canvas, "tahoma", 16);
// Run until someone presses escape
while (!quit)
{
canvas.clear(clan::Colorf(1.0f,1.0f,1.0f, 1.0f)); // White background
font.draw_text(canvas, 8, 20, "Standard Equation:", clan::Colorf::black);
font.draw_text(canvas, 8, 40, "Destination Color = AlphaSource * ColorSource + ( 1 - AlphaSource ) * ColorDestination", clan::Colorf::black);
font.draw_text(canvas, 8, 60, "Destination Alpha = AlphaSource + ( 1 - AlphaSource ) * AlphaDestination", clan::Colorf::black);
font.draw_text(canvas, 8, 100, "ColorSource = Vertex Color * Image Color", clan::Colorf::black);
font.draw_text(canvas, 8, 120, "AlphaSource = Vertex Alpha * Image Alpha", clan::Colorf::black);
int ypos = 160;
int ygap = 80;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 1.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 0.0f, 0.0f, 1.0f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 1.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 0.0f, 0.0f, 0.5f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 1.0f, 1.0f, 0.5f), clan::Colorf(1.0f, 0.0f, 0.0f, 1.0f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 1.0f, 1.0f, 0.5f), clan::Colorf(1.0f, 0.0f, 0.0f, 1.0f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(0.2f, 0.0f, 0.0f, 1.0f), clan::Colorf(0.9f, 0.0f, 0.0f, 1.0f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 0.0f, 0.0f, 0.2f), clan::Colorf(1.0f, 0.0f, 0.0f, 0.9f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.0f, 0.0f, 1.0f, 0.5f), clan::Colorf(1.0f, 1.0f, 1.0f, 1.0f), clan::Colorf(1.0f, 0.0f, 0.0f, 0.5f));
ypos += ygap;
draw_section(canvas, font, ypos, clan::Colorf(0.5f, 0.5f, 1.0f, 1.0f), clan::Colorf(1.0f, 1.0f, 1.0f, 1.0f), clan::Colorf(0.0f, 0.0f, 0.0f, 0.3f));
ypos += ygap;
window.flip(1);
// This call processes user input and other events
clan::KeepAlive::process(0);
}
return 0;
}
void LxDcViCtl::usr_mouse_move(CDC* pDC, int x, int y)
{
if (!section.trace) return;
LxCommand* locate_cmd = new LxCommand();
locate_cmd->add_child_cmd(new LxLocateCmd(x, y));
locate_cmd->set_dvctl(this);
locate_cmd->Excute(pDC);
lx_command_mgr.insert_cmd(locate_cmd);
if (section.cursor_end == cursor)
return;
if (section.cursor_end > section.cursor_begin)
{
if (cursor > section.cursor_end)
{
Section _section;
_section.cursor_begin = section.cursor_end;
_section.cursor_end = cursor;
draw_section(pDC, &_section);
section.cursor_end = cursor;
}
else if (cursor < section.cursor_begin)
{
clear_section(pDC, §ion);
section.cursor_end = cursor;
draw_section(pDC, §ion);
}
else
{
Section _section;
_section.cursor_begin = cursor;
_section.cursor_end = section.cursor_end;
clear_section(pDC, &_section);
section.cursor_end = cursor;
}
}
else if (section.cursor_end < section.cursor_begin)
{
if (cursor < section.cursor_end)
{
Section _section;
_section.cursor_begin = cursor;
_section.cursor_end = section.cursor_end;
draw_section(pDC, &_section);
section.cursor_end = cursor;
}
else if (cursor > section.cursor_begin)
{
clear_section(pDC, §ion);
section.cursor_end = cursor;
draw_section(pDC, §ion);
}
else
{
Section _section;
_section.cursor_begin = section.cursor_end;
_section.cursor_end = cursor;
clear_section(pDC, &_section);
section.cursor_end = cursor;
}
}
else
{
section.cursor_end = cursor;
draw_section(pDC, §ion);
}
}
