diff options
author | Gerd Hoffmann <kraxel@redhat.com> | 2019-04-05 11:52:18 +0200 |
---|---|---|
committer | Gerd Hoffmann <kraxel@redhat.com> | 2019-04-08 06:59:27 +0200 |
commit | ec3de7a43e9cac8a2dc1fce069321cb9538f0b34 (patch) | |
tree | 047e9c418f11e6e40e97c8c9396091d84361e8d4 /drivers | |
parent | bcc4442008aca0e1566b7367f51670143d1ea7bf (diff) |
drm: add drm_fb_xrgb8888_to_rgb888_dstclip()
Simliar to drm_fb_xrgb8888_to_rgb565_dstclip() but converts to rgb888
instead of rgb565.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190405095219.9231-5-kraxel@redhat.com
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/gpu/drm/drm_format_helper.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index 246775510c2e..00d716f14173 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -210,6 +210,66 @@ void drm_fb_xrgb8888_to_rgb565_dstclip(void *dst, unsigned int dst_pitch, } EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565_dstclip); +static void drm_fb_xrgb8888_to_rgb888_lines(void *dst, unsigned int dst_pitch, + void *src, unsigned int src_pitch, + unsigned int src_linelength, + unsigned int lines) +{ + unsigned int linepixels = src_linelength / 3; + unsigned int x, y; + u32 *sbuf; + u8 *dbuf; + + sbuf = kmalloc(src_linelength, GFP_KERNEL); + if (!sbuf) + return; + + for (y = 0; y < lines; y++) { + memcpy(sbuf, src, src_linelength); + dbuf = dst; + for (x = 0; x < linepixels; x++) { + *dbuf++ = (sbuf[x] & 0x000000FF) >> 0; + *dbuf++ = (sbuf[x] & 0x0000FF00) >> 8; + *dbuf++ = (sbuf[x] & 0x00FF0000) >> 16; + } + src += src_pitch; + dst += dst_pitch; + } + + kfree(sbuf); +} + +/** + * drm_fb_xrgb8888_to_rgb888_dstclip - Convert XRGB8888 to RGB888 clip buffer + * @dst: RGB565 destination buffer + * @dst_pitch: destination buffer pitch + * @vaddr: XRGB8888 source buffer + * @fb: DRM framebuffer + * @clip: Clip rectangle area to copy + * @dstclip: Clip destination too. + * + * Drivers can use this function for RGB888 devices that don't natively + * support XRGB8888. + * + * This function applies clipping on dst, i.e. the destination is a + * full framebuffer but only the clip rect content is copied over. + */ +void drm_fb_xrgb8888_to_rgb888_dstclip(void *dst, unsigned int dst_pitch, + void *vaddr, struct drm_framebuffer *fb, + struct drm_rect *clip) +{ + unsigned int src_offset = (clip->y1 * fb->pitches[0]) + + (clip->x1 * sizeof(u32)); + unsigned int dst_offset = (clip->y1 * dst_pitch) + + (clip->x1 * 3); + size_t src_len = (clip->x2 - clip->x1) * sizeof(u32); + + drm_fb_xrgb8888_to_rgb888_lines(dst + dst_offset, dst_pitch, + vaddr + src_offset, fb->pitches[0], + src_len, clip->y2 - clip->y1); +} +EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888_dstclip); + /** * drm_fb_xrgb8888_to_gray8 - Convert XRGB8888 to grayscale * @dst: 8-bit grayscale destination buffer |