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Added GetDisplayDPI

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This commit is contained in:
Vraiment 2017-07-24 23:48:14 -07:00
parent 9b82524c1a
commit a6208de4f8
2 changed files with 59 additions and 0 deletions
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11
SDL2pp/Display.cc
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@ -26,6 +26,17 @@
#include <SDL_video.h>
namespace SDL2pp {
#if SDL_VERSION_ATLEAST(2, 0, 4)
DPI GetDisplayDPI(int displayIndex) {
float diagonal = 0, horizontal = 0, vertical = 0;
if (SDL_GetDisplayDPI(displayIndex, &diagonal, &horizontal, &vertical) < 0) {
throw Exception("SDL_GetDisplayDPI");
}
return DPI{diagonal, horizontal, vertical};
}
#endif
#if SDL_VERSION_ATLEAST(2, 0, 5)
Rect GetDisplayUsableBounds(int displayIndex) {
Rect result;

48
SDL2pp/Display.hh
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@ -29,6 +29,54 @@
#include <SDL2pp/Rect.hh>
namespace SDL2pp {
#if SDL_VERSION_ATLEAST(2, 0, 4)
////////////////////////////////////////////////////////////
/// \brief Read-only struct to store DPI information of a display
///
/// \ingroup graphics
///
/// \headerfile SDL2pp/Display.hh
///
////////////////////////////////////////////////////////////
struct SDL2PP_EXPORT DPI {
////////////////////////////////////////////////////////////
/// \brief The diagonal DPI of the display
///
////////////////////////////////////////////////////////////
const float Diagonal;
////////////////////////////////////////////////////////////
/// \brief The horizontal DPI of the display
///
////////////////////////////////////////////////////////////
const float Horizontal;
////////////////////////////////////////////////////////////
/// \brief The vertical DPI of the display
///
////////////////////////////////////////////////////////////
const float Vertical;
};
////////////////////////////////////////////////////////////
/// \brief Gets the dots/pixels per inch of a given display
///
/// \ingroup graphics
///
/// \headerfile SDL2pp/Display.hh
///
/// \param[in] displayIndex The display to retrieve the DPI
///
/// \returns A DPI object with the dpi values for the given display
///
/// \throws SDL2pp::Exception
///
/// \see https://wiki.libsdl.org/SDL_GetDisplayDPI
///
////////////////////////////////////////////////////////////
SDL2PP_EXPORT DPI GetDisplayDPI(int displayIndex);
#endif
#if SDL_VERSION_ATLEAST(2, 0, 5)
////////////////////////////////////////////////////////////
/// \brief Gets the usable desktop area of a given display