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nit_fb: allow screen-relative initial_width/height

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This change enables the use of negative values for the 'initial_width'
and 'initial_height' attributes to specify values that are relative to
the screen size. This is consistent with the meaning of the 'width' and
'height' attributes.
This commit is contained in:
Norman Feske
2018-02-08 19:03:32 +01:00
parent cd45a3b8d6
commit cd7e3425ee
1 changed files with 25 additions and 15 deletions
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40
repos/os/src/server/nit_fb/main.cc
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@ -231,30 +231,40 @@ struct Nit_fb::Main : View_updater
struct Initial_size struct Initial_size
{ {
unsigned const width { 0 }; long const _width { 0 };
unsigned const height { 0 }; long const _height { 0 };
bool set { false }; bool set { false };
Initial_size(Genode::Xml_node config) Initial_size(Genode::Xml_node config)
: :
width(config.attribute_value("initial_width", 0u)), _width (config.attribute_value("initial_width", 0L)),
height(config.attribute_value("initial_height", 0u)) _height(config.attribute_value("initial_height", 0L))
{ } { }
bool valid() const { return width != 0 && height != 0; } unsigned width(Framebuffer::Mode const &mode) const
{
if (_width > 0) return _width;
if (_width < 0) return mode.width() + _width;
return mode.width();
}
unsigned height(Framebuffer::Mode const &mode) const
{
if (_height > 0) return _height;
if (_height < 0) return mode.height() + _height;
return mode.height();
}
bool valid() const { return _width != 0 && _height != 0; }
} _initial_size { config_rom.xml() }; } _initial_size { config_rom.xml() };
Framebuffer::Mode _initial_mode() Framebuffer::Mode _initial_mode()
{ {
unsigned const width = _initial_size.valid() return Framebuffer::Mode(_initial_size.width (nitpicker.mode()),
? _initial_size.width _initial_size.height(nitpicker.mode()),
: (unsigned)nitpicker.mode().width(); nitpicker.mode().format());
unsigned const height = _initial_size.valid()
? _initial_size.height
: (unsigned)nitpicker.mode().height();
return Framebuffer::Mode(width, height, nitpicker.mode().format());
} }
/* /*
@ -329,8 +339,8 @@ struct Nit_fb::Main : View_updater
height = config.attribute_value("height", (long)nit_mode.height()); height = config.attribute_value("height", (long)nit_mode.height());
if (!_initial_size.set && _initial_size.valid()) { if (!_initial_size.set && _initial_size.valid()) {
width = _initial_size.width; width = _initial_size.width (nit_mode);
height = _initial_size.height; height = _initial_size.height(nit_mode);
_initial_size.set = true; _initial_size.set = true;
} else { } else {