diff options
Diffstat (limited to 'include/hardware/hwcomposer_defs.h')
| -rw-r--r-- | include/hardware/hwcomposer_defs.h | 39 |
1 files changed, 33 insertions, 6 deletions
diff --git a/include/hardware/hwcomposer_defs.h b/include/hardware/hwcomposer_defs.h index bd9f41c..04f4c2c 100644 --- a/include/hardware/hwcomposer_defs.h +++ b/include/hardware/hwcomposer_defs.h @@ -132,24 +132,51 @@ enum { /* attributes queriable with query() */ enum { /* - * availability: HWC_DEVICE_API_VERSION_0_2 - * must return 1 if the background layer is supported, 0 otherwise + * Availability: HWC_DEVICE_API_VERSION_0_2 + * Must return 1 if the background layer is supported, 0 otherwise. */ HWC_BACKGROUND_LAYER_SUPPORTED = 0, /* - * availability: HWC_DEVICE_API_VERSION_0_3 - * returns the vsync period in nanosecond + * Availability: HWC_DEVICE_API_VERSION_0_3 + * Returns the vsync period in nanoseconds. + * + * This query is not used for HWC_DEVICE_API_VERSION_1_1 and later. + * Instead, the per-display attribute HWC_DISPLAY_VSYNC_PERIOD is used. */ HWC_VSYNC_PERIOD = 1, /* - * availability: HWC_DEVICE_API_VERSION_1_1 - * returns a mask of supported display types + * Availability: HWC_DEVICE_API_VERSION_1_1 + * Returns a mask of supported display types. */ HWC_DISPLAY_TYPES_SUPPORTED = 2, }; +/* display attributes returned by getDisplayAttributes() */ +enum { + /* Indicates the end of an attribute list */ + HWC_DISPLAY_NO_ATTRIBUTE = 0, + + /* The vsync period in nanoseconds */ + HWC_DISPLAY_VSYNC_PERIOD = 1, + + /* The number of pixels in the horizontal and vertical directions. */ + HWC_DISPLAY_RESOLUTION_X = 2, + HWC_DISPLAY_RESOLUTION_Y = 3, + + /* The number of pixels per thousand inches of this configuration. + * + * Scaling DPI by 1000 allows it to be stored in an int without losing + * too much precision. + * + * If the DPI for a configuration is unavailable or the HWC implementation + * considers it unreliable, it should set these attributes to zero. + */ + HWC_DISPLAY_DPI_X = 4, + HWC_DISPLAY_DPI_Y = 5, +}; + /* Allowed events for hwc_methods::eventControl() */ enum { HWC_EVENT_VSYNC = 0 |