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nitpicker: reduce artifacts during mode change

This commit is contained in:
Norman Feske 2014-07-25 14:22:03 +02:00
parent 6b42f8b54e
commit 46fa29a156
1 changed files with 38 additions and 3 deletions
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41
repos/os/src/server/nitpicker/main.cc
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@ -928,18 +928,43 @@ class Nitpicker::Session_component : public Genode::Rpc_object<Session>,
Buffer *realloc_buffer(Framebuffer::Mode mode, bool use_alpha)
{
_release_buffer();
typedef Pixel_rgb565 PT;
Area const size(mode.width(), mode.height());
typedef Pixel_rgb565 PT;
_buffer_size =
Chunky_dataspace_texture<PT>::calc_num_bytes(size, use_alpha);
/*
* Preserve the content of the original buffer if nitpicker has
* enough lack memory to temporarily keep the original pixels.
*/
Texture<PT> const *src_texture = nullptr;
if (::Session::texture()) {
enum { PRESERVED_RAM = 128*1024 };
if (env()->ram_session()->avail() > _buffer_size + PRESERVED_RAM) {
src_texture = static_cast<Texture<PT> const *>(::Session::texture());
} else {
PWRN("not enough RAM to preserve buffer content during resize");
_release_buffer();
}
}
Chunky_dataspace_texture<PT> * const texture =
new (&_session_alloc) Chunky_dataspace_texture<PT>(size, use_alpha);
/* copy old buffer content into new buffer and release old buffer */
if (src_texture) {
Genode::Surface<PT> surface(texture->pixel(),
texture->Texture_base::size());
Texture_painter::paint(surface, *src_texture, Color(), Point(0, 0),
Texture_painter::SOLID, false);
_release_buffer();
}
if (!_session_alloc.withdraw(_buffer_size)) {
destroy(&_session_alloc, texture);
_buffer_size = 0;
@ -1141,6 +1166,16 @@ struct Nitpicker::Main
*/
Timer::Connection timer;
/**
* Perform redraw and flush pixels to the framebuffer
*/
void draw_and_flush()
{
user_state.draw(fb_screen->screen).flush([&] (Rect const &rect) {
framebuffer.refresh(rect.x1(), rect.y1(),
rect.w(), rect.h()); });
}
Main(Server::Entrypoint &ep) : ep(ep)
{
// tmp_fb = &framebuffer;