diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2018-08-24 13:17:49 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-08-24 13:17:49 +0100 |
| commit | 9a1f03f4ee207d58674fc76aecff546551c9da76 (patch) | |
| tree | ec8844310f2c010aa86f10163ead9634ba23de3d /include/hw | |
| parent | 9e2938a0fdb6d85d79c9d97b1fe4e626925be9b5 (diff) | |
hw/display/bcm2835_fb: Abstract out calculation of pitch, size
Abstract out the calculation of the pitch and size of the
framebuffer into functions that operate on the BCM2835FBConfig
struct -- these are about to get a little more complicated
when we add support for virtual and physical sizes differing.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814144436.679-6-peter.maydell@linaro.org
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/display/bcm2835_fb.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h index 374de54612..95bcec7fe3 100644 --- a/include/hw/display/bcm2835_fb.h +++ b/include/hw/display/bcm2835_fb.h @@ -52,4 +52,26 @@ typedef struct { void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig); +/** + * bcm2835_fb_get_pitch: return number of bytes per line of the framebuffer + * @config: configuration info for the framebuffer + * + * Return the number of bytes per line of the framebuffer, ie the number + * that must be added to a pixel address to get the address of the pixel + * directly below it on screen. + */ +static inline uint32_t bcm2835_fb_get_pitch(BCM2835FBConfig *config) +{ + return config->xres * (config->bpp >> 3); +} + +/** + * bcm2835_fb_get_size: return total size of framebuffer in bytes + * @config: configuration info for the framebuffer + */ +static inline uint32_t bcm2835_fb_get_size(BCM2835FBConfig *config) +{ + return config->yres * bcm2835_fb_get_pitch(config); +} + #endif |