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fb_sdl: support rotate and flip

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Issue #5428
This commit is contained in:
Norman Feske 2025-01-20 17:35:39 +01:00 committed by Christian Helmuth
parent a5ae1e12bd
commit 19717ab74e
1 changed files with 39 additions and 9 deletions
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48
repos/os/src/driver/framebuffer/sdl/main.cc
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@ -40,9 +40,12 @@ namespace Fb_sdl {
using Area = Capture::Area;
using Rect = Capture::Rect;
using Point = Capture::Point;
using Pixel = Capture::Pixel;
using Affected_rects = Capture::Session::Affected_rects;
using Event_batch = Event::Session_client::Batch;
using Rotate = Blit::Rotate;
using Flip = Blit::Flip;
static constexpr int USER_EVENT_CAPTURE_WAKEUP = 99;
}
@ -65,14 +68,18 @@ struct Fb_sdl::Sdl : Noncopyable
double fps; /* frames per second */
unsigned idle; /* disable capturing after 'idle' frames of no progress */
Rotate rotate;
Flip flip;
static Attr from_xml(Xml_node const &node)
{
return {
.initial_size = { .w = node.attribute_value("width", 1024u),
.h = node.attribute_value("height", 768u) },
.fps = node.attribute_value("fps", 60.0),
.idle = node.attribute_value("idle", 3U)
.fps = node.attribute_value("fps", 60.0),
.idle = node.attribute_value("idle", 3U),
.rotate = Capture::Connection::rotate_from_xml(node),
.flip = { .enabled = node.attribute_value("flip", false) },
};
}
@ -154,6 +161,10 @@ struct Fb_sdl::Sdl : Noncopyable
struct Screen
{
Area const size;
Area padded_size() const { return { .w = align_addr(size.w, 3),
.h = align_addr(size.h, 3) }; }
SDL_Renderer &renderer;
SDL_Surface &_surface = _init_surface();
@ -169,7 +180,7 @@ struct Fb_sdl::Sdl : Noncopyable
unsigned const alpha_mask = 0xFF000000;
SDL_Surface * const surface_ptr =
SDL_CreateRGBSurface(flags, size.w, size.h, bpp,
SDL_CreateRGBSurface(flags, padded_size().w, padded_size().h, bpp,
red_mask, green_mask, blue_mask, alpha_mask);
if (!surface_ptr) {
error("SDL_CreateRGBSurface failed (", Cstring(SDL_GetError()), ")");
@ -183,7 +194,8 @@ struct Fb_sdl::Sdl : Noncopyable
{
SDL_Texture * const texture_ptr =
SDL_CreateTexture(&renderer, SDL_PIXELFORMAT_ARGB8888,
SDL_TEXTUREACCESS_STREAMING, size.w, size.h);
SDL_TEXTUREACCESS_STREAMING,
padded_size().w, padded_size().h);
if (!texture_ptr) {
error("SDL_CreateTexture failed (", Cstring(SDL_GetError()), ")");
throw Createtexture_failed();
@ -202,7 +214,7 @@ struct Fb_sdl::Sdl : Noncopyable
void with_surface(auto const &fn)
{
Surface<Pixel> surface { (Pixel *)_surface.pixels, size };
Surface<Pixel> surface { (Pixel *)_surface.pixels, padded_size() };
fn(surface);
}
@ -273,10 +285,10 @@ struct Fb_sdl::Sdl : Noncopyable
using Attr = Capture::Connection::Screen::Attr;
_captured_screen.construct(_capture, _rm, Attr {
.px = size,
.px = Blit::transformed(size, _attr.rotate),
.mm = { },
.rotate = { },
.flip = { }});
.rotate = _attr.rotate,
.flip = _attr.flip });
_update_screen_from_capture();
_schedule_next_frame();
@ -393,7 +405,25 @@ void Fb_sdl::Sdl::_handle_event(Event_batch &batch, SDL_Event const &event)
if (ox == _mx && oy == _my)
return;
batch.submit(Absolute_motion{_mx, _my});
auto transformed = [&] (Point p, Area area, Rotate rotate, Flip flip)
{
int const w = area.w, h = area.h;
if (flip.enabled)
p = { w - p.x - 1, p.y };
switch (rotate) {
case Rotate::R0: break;
case Rotate::R90: p = { .x = p.y, .y = w - p.x - 1 }; break;
case Rotate::R180: p = { .x = w - p.x - 1, .y = h - p.y - 1 }; break;
case Rotate::R270: p = { .x = h - p.y - 1, .y = p.x }; break;
}
return p;
};
Point const p = transformed({ _mx, _my }, _screen->size, _attr.rotate, _attr.flip);
batch.submit(Absolute_motion{p.x, p.y});
return;
}