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Replace Framebuffer::info by Framebuffer::mode

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As a preliminary step for working on issue #11, this patch revisits the
'Framebuffer::info' RPC call. Instead of using C-style out paramters,
the new 'mode()' RPC call returns the mode information as an object of
type 'Mode'. Consequently, mode-specific functions such as
'bytes_per_pixel' have been moved to the new 'Framebuffer::Mode' class.
This commit is contained in:
Norman Feske
2012-01-18 14:57:08 +01:00
parent 07a9a8361e
commit 9e3ecade16
19 changed files with 159 additions and 157 deletions
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58
os/include/framebuffer_session/framebuffer_session.h
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@@ -19,15 +19,48 @@
namespace Framebuffer {
struct Mode
{
public:
/**
* Pixel formats
*/
enum Format { INVALID, RGB565 };
static Genode::size_t bytes_per_pixel(Format format)
{
if (format == RGB565) return 2;
return 0;
}
private:
int _width, _height;
Format _format;
public:
Mode() : _width(0), _height(0), _format(INVALID) { }
Mode(int width, int height, Format format)
: _width(width), _height(height), _format(format) { }
int width() const { return _width; }
int height() const { return _height; }
Format format() const { return _format; }
/**
* Return number of bytes per pixel
*/
Genode::size_t bytes_per_pixel() const {
return bytes_per_pixel(_format); }
};
struct Session : Genode::Session
{
static const char *service_name() { return "Framebuffer"; }
/**
* Pixel formats
*/
enum Mode { INVALID, RGB565 };
virtual ~Session() { }
/**
@@ -37,12 +70,8 @@ namespace Framebuffer {
/**
* Request current screen mode properties
*
* \param out_w width of frame buffer
* \param out_h height of frame buffer
* \param out_mode pixel format
*/
virtual void info(int *out_w, int *out_h, Mode *out_mode) = 0;
virtual Mode mode() = 0;
/**
* Flush specified pixel region
@@ -51,21 +80,16 @@ namespace Framebuffer {
*/
virtual void refresh(int x, int y, int w, int h) = 0;
/**
* Return number of bytes per pixel for a given pixel format
*/
static Genode::size_t bytes_per_pixel(Mode mode) { return 2; }
/*********************
** RPC declaration **
*********************/
GENODE_RPC(Rpc_dataspace, Genode::Dataspace_capability, dataspace);
GENODE_RPC(Rpc_info, void, info, int *, int *, Mode *);
GENODE_RPC(Rpc_mode, Mode, mode);
GENODE_RPC(Rpc_refresh, void, refresh, int, int, int, int);
GENODE_RPC_INTERFACE(Rpc_dataspace, Rpc_info, Rpc_refresh);
GENODE_RPC_INTERFACE(Rpc_dataspace, Rpc_mode, Rpc_refresh);
};
}