drm_draw.c

  1// SPDX-License-Identifier: GPL-2.0 or MIT
  2/*
  3 * Copyright (c) 2023 Red Hat.
  4 * Author: Jocelyn Falempe <jfalempe@redhat.com>
  5 */
  6
  7#include <linux/bits.h>
  8#include <linux/bug.h>
  9#include <linux/export.h>
 10#include <linux/iosys-map.h>
 11#include <linux/types.h>
 12
 13#include <drm/drm_fourcc.h>
 14
 15#include "drm_draw_internal.h"
 16#include "drm_format_internal.h"
 17
 18/**
 19 * drm_draw_color_from_xrgb8888 - convert one pixel from xrgb8888 to the desired format
 20 * @color: input color, in xrgb8888 format
 21 * @format: output format
 22 *
 23 * Returns:
 24 * Color in the format specified, casted to u32.
 25 * Or 0 if the format is not supported.
 26 */
 27u32 drm_draw_color_from_xrgb8888(u32 color, u32 format)
 28{
 29	switch (format) {
 30	case DRM_FORMAT_RGB565:
 31		return drm_pixel_xrgb8888_to_rgb565(color);
 32	case DRM_FORMAT_RGBA5551:
 33		return drm_pixel_xrgb8888_to_rgba5551(color);
 34	case DRM_FORMAT_XRGB1555:
 35		return drm_pixel_xrgb8888_to_xrgb1555(color);
 36	case DRM_FORMAT_ARGB1555:
 37		return drm_pixel_xrgb8888_to_argb1555(color);
 38	case DRM_FORMAT_RGB888:
 39	case DRM_FORMAT_XRGB8888:
 40		return color;
 41	case DRM_FORMAT_ARGB8888:
 42		return drm_pixel_xrgb8888_to_argb8888(color);
 43	case DRM_FORMAT_XBGR8888:
 44		return drm_pixel_xrgb8888_to_xbgr8888(color);
 45	case DRM_FORMAT_ABGR8888:
 46		return drm_pixel_xrgb8888_to_abgr8888(color);
 47	case DRM_FORMAT_XRGB2101010:
 48		return drm_pixel_xrgb8888_to_xrgb2101010(color);
 49	case DRM_FORMAT_ARGB2101010:
 50		return drm_pixel_xrgb8888_to_argb2101010(color);
 51	case DRM_FORMAT_ABGR2101010:
 52		return drm_pixel_xrgb8888_to_abgr2101010(color);
 53	default:
 54		WARN_ONCE(1, "Can't convert to %p4cc\n", &format);
 55		return 0;
 56	}
 57}
 58EXPORT_SYMBOL(drm_draw_color_from_xrgb8888);
 59
 60/*
 61 * Blit functions
 62 */
 63void drm_draw_blit16(struct iosys_map *dmap, unsigned int dpitch,
 64		     const u8 *sbuf8, unsigned int spitch,
 65		     unsigned int height, unsigned int width,
 66		     unsigned int scale, u16 fg16)
 67{
 68	unsigned int y, x;
 69
 70	for (y = 0; y < height; y++)
 71		for (x = 0; x < width; x++)
 72			if (drm_draw_is_pixel_fg(sbuf8, spitch, x / scale, y / scale))
 73				iosys_map_wr(dmap, y * dpitch + x * sizeof(u16), u16, fg16);
 74}
 75EXPORT_SYMBOL(drm_draw_blit16);
 76
 77void drm_draw_blit24(struct iosys_map *dmap, unsigned int dpitch,
 78		     const u8 *sbuf8, unsigned int spitch,
 79		     unsigned int height, unsigned int width,
 80		     unsigned int scale, u32 fg32)
 81{
 82	unsigned int y, x;
 83
 84	for (y = 0; y < height; y++) {
 85		for (x = 0; x < width; x++) {
 86			u32 off = y * dpitch + x * 3;
 87
 88			if (drm_draw_is_pixel_fg(sbuf8, spitch, x / scale, y / scale)) {
 89				/* write blue-green-red to output in little endianness */
 90				iosys_map_wr(dmap, off, u8, (fg32 & 0x000000FF) >> 0);
 91				iosys_map_wr(dmap, off + 1, u8, (fg32 & 0x0000FF00) >> 8);
 92				iosys_map_wr(dmap, off + 2, u8, (fg32 & 0x00FF0000) >> 16);
 93			}
 94		}
 95	}
 96}
 97EXPORT_SYMBOL(drm_draw_blit24);
 98
 99void drm_draw_blit32(struct iosys_map *dmap, unsigned int dpitch,
100		     const u8 *sbuf8, unsigned int spitch,
101		     unsigned int height, unsigned int width,
102		     unsigned int scale, u32 fg32)
103{
104	unsigned int y, x;
105
106	for (y = 0; y < height; y++)
107		for (x = 0; x < width; x++)
108			if (drm_draw_is_pixel_fg(sbuf8, spitch, x / scale, y / scale))
109				iosys_map_wr(dmap, y * dpitch + x * sizeof(u32), u32, fg32);
110}
111EXPORT_SYMBOL(drm_draw_blit32);
112
113/*
114 * Fill functions
115 */
116void drm_draw_fill16(struct iosys_map *dmap, unsigned int dpitch,
117		     unsigned int height, unsigned int width,
118		     u16 color)
119{
120	unsigned int y, x;
121
122	for (y = 0; y < height; y++)
123		for (x = 0; x < width; x++)
124			iosys_map_wr(dmap, y * dpitch + x * sizeof(u16), u16, color);
125}
126EXPORT_SYMBOL(drm_draw_fill16);
127
128void drm_draw_fill24(struct iosys_map *dmap, unsigned int dpitch,
129		     unsigned int height, unsigned int width,
130		     u32 color)
131{
132	unsigned int y, x;
133
134	for (y = 0; y < height; y++) {
135		for (x = 0; x < width; x++) {
136			unsigned int off = y * dpitch + x * 3;
137
138			/* write blue-green-red to output in little endianness */
139			iosys_map_wr(dmap, off, u8, (color & 0x000000FF) >> 0);
140			iosys_map_wr(dmap, off + 1, u8, (color & 0x0000FF00) >> 8);
141			iosys_map_wr(dmap, off + 2, u8, (color & 0x00FF0000) >> 16);
142		}
143	}
144}
145EXPORT_SYMBOL(drm_draw_fill24);
146
147void drm_draw_fill32(struct iosys_map *dmap, unsigned int dpitch,
148		     unsigned int height, unsigned int width,
149		     u32 color)
150{
151	unsigned int y, x;
152
153	for (y = 0; y < height; y++)
154		for (x = 0; x < width; x++)
155			iosys_map_wr(dmap, y * dpitch + x * sizeof(u32), u32, color);
156}
157EXPORT_SYMBOL(drm_draw_fill32);