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// SPDX-License-Identifier: GPL-2.0 or MIT
/*
* Copyright (c) 2023 Red Hat.
* Author: Jocelyn Falempe <jfalempe@redhat.com>
*/
#include <linux/bits.h>
#include <linux/iosys-map.h>
#include <linux/types.h>
#include <drm/drm_fourcc.h>
#include "drm_draw_internal.h"
/*
* Conversions from xrgb8888
*/
static u16 convert_xrgb8888_to_rgb565(u32 pix)
{
return ((pix & 0x00F80000) >> 8) |
((pix & 0x0000FC00) >> 5) |
((pix & 0x000000F8) >> 3);
}
static u16 convert_xrgb8888_to_rgba5551(u32 pix)
{
return ((pix & 0x00f80000) >> 8) |
((pix & 0x0000f800) >> 5) |
((pix & 0x000000f8) >> 2) |
BIT(0); /* set alpha bit */
}
static u16 convert_xrgb8888_to_xrgb1555(u32 pix)
{
return ((pix & 0x00f80000) >> 9) |
((pix & 0x0000f800) >> 6) |
((pix & 0x000000f8) >> 3);
}
static u16 convert_xrgb8888_to_argb1555(u32 pix)
{
return BIT(15) | /* set alpha bit */
((pix & 0x00f80000) >> 9) |
((pix & 0x0000f800) >> 6) |
((pix & 0x000000f8) >> 3);
}
static u32 convert_xrgb8888_to_argb8888(u32 pix)
{
return pix | GENMASK(31, 24); /* fill alpha bits */
}
static u32 convert_xrgb8888_to_xbgr8888(u32 pix)
{
return ((pix & 0x00ff0000) >> 16) << 0 |
((pix & 0x0000ff00) >> 8) << 8 |
((pix & 0x000000ff) >> 0) << 16 |
((pix & 0xff000000) >> 24) << 24;
}
static u32 convert_xrgb8888_to_abgr8888(u32 pix)
{
return ((pix & 0x00ff0000) >> 16) << 0 |
((pix & 0x0000ff00) >> 8) << 8 |
((pix & 0x000000ff) >> 0) << 16 |
GENMASK(31, 24); /* fill alpha bits */
}
static u32 convert_xrgb8888_to_xrgb2101010(u32 pix)
{
pix = ((pix & 0x000000FF) << 2) |
((pix & 0x0000FF00) << 4) |
((pix & 0x00FF0000) << 6);
return pix | ((pix >> 8) & 0x00300C03);
}
static u32 convert_xrgb8888_to_argb2101010(u32 pix)
{
pix = ((pix & 0x000000FF) << 2) |
((pix & 0x0000FF00) << 4) |
((pix & 0x00FF0000) << 6);
return GENMASK(31, 30) /* set alpha bits */ | pix | ((pix >> 8) & 0x00300C03);
}
static u32 convert_xrgb8888_to_abgr2101010(u32 pix)
{
pix = ((pix & 0x00FF0000) >> 14) |
((pix & 0x0000FF00) << 4) |
((pix & 0x000000FF) << 22);
return GENMASK(31, 30) /* set alpha bits */ | pix | ((pix >> 8) & 0x00300C03);
}
/**
* drm_draw_color_from_xrgb8888 - convert one pixel from xrgb8888 to the desired format
* @color: input color, in xrgb8888 format
* @format: output format
*
* Returns:
* Color in the format specified, casted to u32.
* Or 0 if the format is not supported.
*/
u32 drm_draw_color_from_xrgb8888(u32 color, u32 format)
{
switch (format) {
case DRM_FORMAT_RGB565:
return convert_xrgb8888_to_rgb565(color);
case DRM_FORMAT_RGBA5551:
return convert_xrgb8888_to_rgba5551(color);
case DRM_FORMAT_XRGB1555:
return convert_xrgb8888_to_xrgb1555(color);
case DRM_FORMAT_ARGB1555:
return convert_xrgb8888_to_argb1555(color);
case DRM_FORMAT_RGB888:
case DRM_FORMAT_XRGB8888:
return color;
case DRM_FORMAT_ARGB8888:
return convert_xrgb8888_to_argb8888(color);
case DRM_FORMAT_XBGR8888:
return convert_xrgb8888_to_xbgr8888(color);
case DRM_FORMAT_ABGR8888:
return convert_xrgb8888_to_abgr8888(color);
case DRM_FORMAT_XRGB2101010:
return convert_xrgb8888_to_xrgb2101010(color);
case DRM_FORMAT_ARGB2101010:
return convert_xrgb8888_to_argb2101010(color);
case DRM_FORMAT_ABGR2101010:
return convert_xrgb8888_to_abgr2101010(color);
default:
WARN_ONCE(1, "Can't convert to %p4cc\n", &format);
return 0;
}
}
EXPORT_SYMBOL(drm_draw_color_from_xrgb8888);
/*
* Blit functions
*/
void drm_draw_blit16(struct iosys_map *dmap, unsigned int dpitch,
const u8 *sbuf8, unsigned int spitch,
unsigned int height, unsigned int width,
unsigned int scale, u16 fg16)
{
unsigned int y, x;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
if (drm_draw_is_pixel_fg(sbuf8, spitch, x / scale, y / scale))
iosys_map_wr(dmap, y * dpitch + x * sizeof(u16), u16, fg16);
}
EXPORT_SYMBOL(drm_draw_blit16);
void drm_draw_blit24(struct iosys_map *dmap, unsigned int dpitch,
const u8 *sbuf8, unsigned int spitch,
unsigned int height, unsigned int width,
unsigned int scale, u32 fg32)
{
unsigned int y, x;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
u32 off = y * dpitch + x * 3;
if (drm_draw_is_pixel_fg(sbuf8, spitch, x / scale, y / scale)) {
/* write blue-green-red to output in little endianness */
iosys_map_wr(dmap, off, u8, (fg32 & 0x000000FF) >> 0);
iosys_map_wr(dmap, off + 1, u8, (fg32 & 0x0000FF00) >> 8);
iosys_map_wr(dmap, off + 2, u8, (fg32 & 0x00FF0000) >> 16);
}
}
}
}
EXPORT_SYMBOL(drm_draw_blit24);
void drm_draw_blit32(struct iosys_map *dmap, unsigned int dpitch,
const u8 *sbuf8, unsigned int spitch,
unsigned int height, unsigned int width,
unsigned int scale, u32 fg32)
{
unsigned int y, x;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
if (drm_draw_is_pixel_fg(sbuf8, spitch, x / scale, y / scale))
iosys_map_wr(dmap, y * dpitch + x * sizeof(u32), u32, fg32);
}
EXPORT_SYMBOL(drm_draw_blit32);
/*
* Fill functions
*/
void drm_draw_fill16(struct iosys_map *dmap, unsigned int dpitch,
unsigned int height, unsigned int width,
u16 color)
{
unsigned int y, x;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
iosys_map_wr(dmap, y * dpitch + x * sizeof(u16), u16, color);
}
EXPORT_SYMBOL(drm_draw_fill16);
void drm_draw_fill24(struct iosys_map *dmap, unsigned int dpitch,
unsigned int height, unsigned int width,
u16 color)
{
unsigned int y, x;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
unsigned int off = y * dpitch + x * 3;
/* write blue-green-red to output in little endianness */
iosys_map_wr(dmap, off, u8, (color & 0x000000FF) >> 0);
iosys_map_wr(dmap, off + 1, u8, (color & 0x0000FF00) >> 8);
iosys_map_wr(dmap, off + 2, u8, (color & 0x00FF0000) >> 16);
}
}
}
EXPORT_SYMBOL(drm_draw_fill24);
void drm_draw_fill32(struct iosys_map *dmap, unsigned int dpitch,
unsigned int height, unsigned int width,
u32 color)
{
unsigned int y, x;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
iosys_map_wr(dmap, y * dpitch + x * sizeof(u32), u32, color);
}
EXPORT_SYMBOL(drm_draw_fill32);
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