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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
This commit is contained in:
Gerd Hoffmann 2019-04-05 11:52:18 +02:00
parent bcc4442008
commit ec3de7a43e
2 changed files with 63 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
drivers/gpu/drm/drm_format_helper.c
View File

@ -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

3
include/drm/drm_format_helper.h
View File

@ -25,6 +25,9 @@ void drm_fb_xrgb8888_to_rgb565(void *dst, void *vaddr,
void drm_fb_xrgb8888_to_rgb565_dstclip(void *dst, unsigned int dst_pitch,
void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip, bool swap);
void drm_fb_xrgb8888_to_rgb888_dstclip(void *dst, unsigned int dst_pitch,
void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip);
void drm_fb_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip);