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zephyr/drivers/display/display_sdl.c

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/*
* Copyright (c) 2018 Jan Van Winkel <jan.van_winkel@dxplore.eu>
* Copyright (c) 2021 Nordic Semiconductor
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT zephyr_sdl_dc
#include <zephyr/drivers/display.h>
#include <string.h>
#include <stdlib.h>
#include <soc.h>
#include <zephyr/sys/byteorder.h>
#include "display_sdl_bottom.h"
#include "cmdline.h"
#define LOG_LEVEL CONFIG_DISPLAY_LOG_LEVEL
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(display_sdl);
static uint32_t sdl_display_zoom_pct;
struct sdl_display_config {
uint16_t height;
uint16_t width;
};
struct sdl_display_data {
void *window;
void *renderer;
void *mutex;
void *texture;
void *read_texture;
bool display_on;
enum display_pixel_format current_pixel_format;
uint8_t *buf;
uint8_t *read_buf;
};
static inline uint32_t mono_pixel_order(uint32_t order)
{
if (IS_ENABLED(CONFIG_SDL_DISPLAY_MONO_MSB_FIRST)) {
return BIT(7 - order);
} else {
return BIT(order);
}
}
static int sdl_display_init(const struct device *dev)
{
const struct sdl_display_config *config = dev->config;
struct sdl_display_data *disp_data = dev->data;
bool use_accelerator = true;
LOG_DBG("Initializing display driver");
IF_DISABLED(CONFIG_SDL_DISPLAY_USE_HARDWARE_ACCELERATOR, (use_accelerator = false));
disp_data->current_pixel_format =
#if defined(CONFIG_SDL_DISPLAY_DEFAULT_PIXEL_FORMAT_RGB_888)
PIXEL_FORMAT_RGB_888
#elif defined(CONFIG_SDL_DISPLAY_DEFAULT_PIXEL_FORMAT_MONO01)
PIXEL_FORMAT_MONO01
#elif defined(CONFIG_SDL_DISPLAY_DEFAULT_PIXEL_FORMAT_MONO10)
PIXEL_FORMAT_MONO10
#elif defined(CONFIG_SDL_DISPLAY_DEFAULT_PIXEL_FORMAT_RGB_565)
PIXEL_FORMAT_RGB_565
#elif defined(CONFIG_SDL_DISPLAY_DEFAULT_PIXEL_FORMAT_BGR_565)
PIXEL_FORMAT_BGR_565
#else /* SDL_DISPLAY_DEFAULT_PIXEL_FORMAT */
PIXEL_FORMAT_ARGB_8888
#endif /* SDL_DISPLAY_DEFAULT_PIXEL_FORMAT */
;
if (sdl_display_zoom_pct == UINT32_MAX) {
sdl_display_zoom_pct = CONFIG_SDL_DISPLAY_ZOOM_PCT;
}
int rc = sdl_display_init_bottom(config->height, config->width, sdl_display_zoom_pct,
use_accelerator, &disp_data->window, &disp_data->renderer,
&disp_data->mutex, &disp_data->texture,
&disp_data->read_texture);
if (rc != 0) {
LOG_ERR("Failed to create SDL display");
return -EIO;
}
disp_data->display_on = false;
return 0;
}
static void sdl_display_write_argb8888(void *disp_buf,
const struct display_buffer_descriptor *desc, const void *buf)
{
__ASSERT((desc->pitch * 4U * desc->height) <= desc->buf_size,
"Input buffer to small");
memcpy(disp_buf, buf, desc->pitch * 4U * desc->height);
}
static void sdl_display_write_rgb888(uint8_t *disp_buf,
const struct display_buffer_descriptor *desc, const void *buf)
{
uint32_t w_idx;
uint32_t h_idx;
uint32_t pixel;
const uint8_t *byte_ptr;
__ASSERT((desc->pitch * 3U * desc->height) <= desc->buf_size,
"Input buffer to small");
for (h_idx = 0U; h_idx < desc->height; ++h_idx) {
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
byte_ptr = (const uint8_t *)buf +
((h_idx * desc->pitch) + w_idx) * 3U;
pixel = *byte_ptr << 16;
pixel |= *(byte_ptr + 1) << 8;
pixel |= *(byte_ptr + 2);
*((uint32_t *)disp_buf) = pixel;
disp_buf += 4;
}
}
}
static void sdl_display_write_rgb565(uint8_t *disp_buf,
const struct display_buffer_descriptor *desc, const void *buf)
{
uint32_t w_idx;
uint32_t h_idx;
uint32_t pixel;
const uint16_t *pix_ptr;
uint16_t rgb565;
__ASSERT((desc->pitch * 2U * desc->height) <= desc->buf_size,
"Input buffer to small");
for (h_idx = 0U; h_idx < desc->height; ++h_idx) {
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
pix_ptr = (const uint16_t *)buf +
((h_idx * desc->pitch) + w_idx);
rgb565 = sys_be16_to_cpu(*pix_ptr);
pixel = (((rgb565 >> 11) & 0x1F) * 255 / 31) << 16;
pixel |= (((rgb565 >> 5) & 0x3F) * 255 / 63) << 8;
pixel |= (rgb565 & 0x1F) * 255 / 31;
*((uint32_t *)disp_buf) = pixel;
disp_buf += 4;
}
}
}
static void sdl_display_write_bgr565(uint8_t *disp_buf,
const struct display_buffer_descriptor *desc, const void *buf)
{
uint32_t w_idx;
uint32_t h_idx;
uint32_t pixel;
const uint16_t *pix_ptr;
__ASSERT((desc->pitch * 2U * desc->height) <= desc->buf_size,
"Input buffer to small");
for (h_idx = 0U; h_idx < desc->height; ++h_idx) {
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
pix_ptr = (const uint16_t *)buf +
((h_idx * desc->pitch) + w_idx);
pixel = (((*pix_ptr >> 11) & 0x1F) * 255 / 31) << 16;
pixel |= (((*pix_ptr >> 5) & 0x3F) * 255 / 63) << 8;
pixel |= (*pix_ptr & 0x1F) * 255 / 31;
*((uint32_t *)disp_buf) = pixel;
disp_buf += 4;
}
}
}
static void sdl_display_write_mono(uint8_t *disp_buf,
const struct display_buffer_descriptor *desc, const void *buf,
const bool one_is_black)
{
uint32_t w_idx;
uint32_t h_idx;
uint32_t tile_idx;
uint32_t pixel;
const uint8_t *byte_ptr;
uint32_t one_color;
uint8_t *disp_buf_start;
__ASSERT((desc->pitch * desc->height) <= (desc->buf_size * 8U),
"Input buffer to small");
__ASSERT((desc->height % 8) == 0U,
"Input buffer height not aligned per 8 pixels");
if (one_is_black) {
one_color = 0U;
} else {
one_color = 0x00FFFFFF;
}
for (tile_idx = 0U; tile_idx < desc->height/8U; ++tile_idx) {
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
byte_ptr = (const uint8_t *)buf +
((tile_idx * desc->pitch) + w_idx);
disp_buf_start = disp_buf;
for (h_idx = 0U; h_idx < 8; ++h_idx) {
if ((*byte_ptr & mono_pixel_order(h_idx)) != 0U) {
pixel = one_color;
} else {
pixel = (~one_color) & 0x00FFFFFF;
}
*((uint32_t *)disp_buf) = pixel;
disp_buf += (desc->width * 4U);
}
disp_buf = disp_buf_start;
disp_buf += 4;
}
disp_buf += 7 * (desc->width * 4U);
}
}
static int sdl_display_write(const struct device *dev, const uint16_t x,
const uint16_t y,
const struct display_buffer_descriptor *desc,
const void *buf)
{
const struct sdl_display_config *config = dev->config;
struct sdl_display_data *disp_data = dev->data;
LOG_DBG("Writing %dx%d (w,h) bitmap @ %dx%d (x,y)", desc->width,
desc->height, x, y);
__ASSERT(desc->width <= desc->pitch, "Pitch is smaller then width");
__ASSERT(desc->pitch <= config->width,
"Pitch in descriptor is larger than screen size");
__ASSERT(desc->height <= config->height,
"Height in descriptor is larger than screen size");
__ASSERT(x + desc->width <= config->width,
"Writing outside screen boundaries in horizontal direction");
__ASSERT(y + desc->height <= config->height,
"Writing outside screen boundaries in vertical direction");
if (desc->width > desc->pitch ||
x + desc->width > config->width ||
y + desc->height > config->height) {
return -EINVAL;
}
if (disp_data->current_pixel_format == PIXEL_FORMAT_ARGB_8888) {
sdl_display_write_argb8888(disp_data->buf, desc, buf);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_RGB_888) {
sdl_display_write_rgb888(disp_data->buf, desc, buf);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_MONO10) {
sdl_display_write_mono(disp_data->buf, desc, buf, true);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_MONO01) {
sdl_display_write_mono(disp_data->buf, desc, buf, false);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_RGB_565) {
sdl_display_write_rgb565(disp_data->buf, desc, buf);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_BGR_565) {
sdl_display_write_bgr565(disp_data->buf, desc, buf);
}
sdl_display_write_bottom(desc->height, desc->width, x, y,
disp_data->renderer, disp_data->mutex, disp_data->texture,
disp_data->buf, disp_data->display_on);
return 0;
}
static void sdl_display_read_argb8888(const uint8_t *read_buf,
const struct display_buffer_descriptor *desc, void *buf)
{
__ASSERT((desc->pitch * 4U * desc->height) <= desc->buf_size, "Read buffer is too small");
memcpy(buf, read_buf, desc->pitch * 4U * desc->height);
}
static void sdl_display_read_rgb888(const uint8_t *read_buf,
const struct display_buffer_descriptor *desc, void *buf)
{
uint32_t w_idx;
uint32_t h_idx;
uint8_t *buf8;
const uint32_t *pix_ptr;
__ASSERT((desc->pitch * 3U * desc->height) <= desc->buf_size, "Read buffer is too small");
for (h_idx = 0U; h_idx < desc->height; ++h_idx) {
buf8 = ((uint8_t *)buf) + desc->pitch * 3U * h_idx;
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
pix_ptr = (const uint32_t *)read_buf + ((h_idx * desc->pitch) + w_idx);
*buf8 = (*pix_ptr & 0xFF0000) >> 16;
buf8 += 1;
*buf8 = (*pix_ptr & 0xFF00) >> 8;
buf8 += 1;
*buf8 = (*pix_ptr & 0xFF);
buf8 += 1;
}
}
}
static void sdl_display_read_rgb565(const uint8_t *read_buf,
const struct display_buffer_descriptor *desc, void *buf)
{
uint32_t w_idx;
uint32_t h_idx;
uint16_t pixel;
uint16_t *buf16;
const uint32_t *pix_ptr;
__ASSERT((desc->pitch * 2U * desc->height) <= desc->buf_size, "Read buffer is too small");
for (h_idx = 0U; h_idx < desc->height; ++h_idx) {
buf16 = (void *)(((uint8_t *)buf) + desc->pitch * 2U * h_idx);
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
pix_ptr = (const uint32_t *)read_buf + ((h_idx * desc->pitch) + w_idx);
pixel = (*pix_ptr & 0xF80000) >> 8;
pixel |= (*pix_ptr & 0x00FC00) >> 5;
pixel |= (*pix_ptr & 0x0000F8) >> 3;
*buf16 = sys_be16_to_cpu(pixel);
buf16 += 1;
}
}
}
static void sdl_display_read_bgr565(const uint8_t *read_buf,
const struct display_buffer_descriptor *desc, void *buf)
{
uint32_t w_idx;
uint32_t h_idx;
uint16_t pixel;
uint16_t *buf16;
const uint32_t *pix_ptr;
__ASSERT((desc->pitch * 2U * desc->height) <= desc->buf_size, "Read buffer is too small");
for (h_idx = 0U; h_idx < desc->height; ++h_idx) {
buf16 = (void *)(((uint8_t *)buf) + desc->pitch * 2U * h_idx);
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
pix_ptr = (const uint32_t *)read_buf + ((h_idx * desc->pitch) + w_idx);
pixel = (*pix_ptr & 0xF80000) >> 8;
pixel |= (*pix_ptr & 0x00FC00) >> 5;
pixel |= (*pix_ptr & 0x0000F8) >> 3;
*buf16 = pixel;
buf16 += 1;
}
}
}
static void sdl_display_read_mono(const uint8_t *read_buf,
const struct display_buffer_descriptor *desc, void *buf,
const bool one_is_black)
{
uint32_t w_idx;
uint32_t h_idx;
uint32_t tile_idx;
uint8_t tile;
const uint32_t *pix_ptr;
uint8_t *buf8;
__ASSERT((desc->pitch * desc->height) <= (desc->buf_size * 8U), "Read buffer is too small");
__ASSERT((desc->height % 8U) == 0U, "Read buffer height not aligned per 8 pixels");
for (tile_idx = 0U; tile_idx < (desc->height / 8U); ++tile_idx) {
buf8 = (void *)(((uint8_t *)buf) + desc->pitch * tile_idx);
for (w_idx = 0U; w_idx < desc->width; ++w_idx) {
tile = 0;
for (h_idx = 0U; h_idx < 8; ++h_idx) {
pix_ptr = (const uint32_t *)read_buf +
((tile_idx * 8 + h_idx) * desc->pitch + w_idx);
if ((*pix_ptr)) {
tile |= mono_pixel_order(h_idx);
}
}
*buf8 = one_is_black ? ~tile : tile;
buf8 += 1;
}
}
}
static int sdl_display_read(const struct device *dev, const uint16_t x,
const uint16_t y,
const struct display_buffer_descriptor *desc,
void *buf)
{
struct sdl_display_data *disp_data = dev->data;
int err;
LOG_DBG("Reading %dx%d (w,h) bitmap @ %dx%d (x,y)", desc->width,
desc->height, x, y);
__ASSERT(desc->width <= desc->pitch, "Pitch is smaller than width");
memset(disp_data->read_buf, 0, desc->pitch * desc->height * 4);
err = sdl_display_read_bottom(desc->height, desc->width, x, y, disp_data->renderer,
disp_data->read_buf, desc->pitch, disp_data->mutex,
disp_data->texture, disp_data->read_texture);
if (err) {
return err;
}
if (disp_data->current_pixel_format == PIXEL_FORMAT_ARGB_8888) {
sdl_display_read_argb8888(disp_data->read_buf, desc, buf);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_RGB_888) {
sdl_display_read_rgb888(disp_data->read_buf, desc, buf);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_MONO10) {
sdl_display_read_mono(disp_data->read_buf, desc, buf, true);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_MONO01) {
sdl_display_read_mono(disp_data->read_buf, desc, buf, false);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_RGB_565) {
sdl_display_read_rgb565(disp_data->read_buf, desc, buf);
} else if (disp_data->current_pixel_format == PIXEL_FORMAT_BGR_565) {
sdl_display_read_bgr565(disp_data->read_buf, desc, buf);
}
return 0;
}
static int sdl_display_blanking_off(const struct device *dev)
{
struct sdl_display_data *disp_data = dev->data;
LOG_DBG("Turning display blacking off");
disp_data->display_on = true;
sdl_display_blanking_off_bottom(disp_data->renderer, disp_data->texture);
return 0;
}
static int sdl_display_blanking_on(const struct device *dev)
{
struct sdl_display_data *disp_data = dev->data;
LOG_DBG("Turning display blanking on");
disp_data->display_on = false;
sdl_display_blanking_on_bottom(disp_data->renderer);
return 0;
}
static void sdl_display_get_capabilities(
const struct device *dev, struct display_capabilities *capabilities)
{
const struct sdl_display_config *config = dev->config;
struct sdl_display_data *disp_data = dev->data;
memset(capabilities, 0, sizeof(struct display_capabilities));
capabilities->x_resolution = config->width;
capabilities->y_resolution = config->height;
capabilities->supported_pixel_formats = PIXEL_FORMAT_ARGB_8888 |
PIXEL_FORMAT_RGB_888 |
PIXEL_FORMAT_MONO01 |
PIXEL_FORMAT_MONO10 |
PIXEL_FORMAT_RGB_565 |
PIXEL_FORMAT_BGR_565;
capabilities->current_pixel_format = disp_data->current_pixel_format;
capabilities->screen_info = SCREEN_INFO_MONO_VTILED |
(IS_ENABLED(CONFIG_SDL_DISPLAY_MONO_MSB_FIRST) ? SCREEN_INFO_MONO_MSB_FIRST : 0);
}
static int sdl_display_set_pixel_format(const struct device *dev,
const enum display_pixel_format pixel_format)
{
struct sdl_display_data *disp_data = dev->data;
switch (pixel_format) {
case PIXEL_FORMAT_ARGB_8888:
case PIXEL_FORMAT_RGB_888:
case PIXEL_FORMAT_MONO01:
case PIXEL_FORMAT_MONO10:
case PIXEL_FORMAT_RGB_565:
case PIXEL_FORMAT_BGR_565:
disp_data->current_pixel_format = pixel_format;
return 0;
default:
LOG_ERR("Pixel format not supported");
return -ENOTSUP;
}
}
static void sdl_display_cleanup(struct sdl_display_data *disp_data)
{
sdl_display_cleanup_bottom(&disp_data->window, &disp_data->renderer, &disp_data->mutex,
&disp_data->texture, &disp_data->read_texture);
}
static const struct display_driver_api sdl_display_api = {
.blanking_on = sdl_display_blanking_on,
.blanking_off = sdl_display_blanking_off,
.write = sdl_display_write,
.read = sdl_display_read,
.get_capabilities = sdl_display_get_capabilities,
.set_pixel_format = sdl_display_set_pixel_format,
};
#define DISPLAY_SDL_DEFINE(n) \
static const struct sdl_display_config sdl_config_##n = { \
.height = DT_INST_PROP(n, height), \
.width = DT_INST_PROP(n, width), \
}; \
\
static uint8_t sdl_buf_##n[4 * DT_INST_PROP(n, height) \
* DT_INST_PROP(n, width)]; \
static uint8_t sdl_read_buf_##n[4 * DT_INST_PROP(n, height) \
* DT_INST_PROP(n, width)]; \
static struct sdl_display_data sdl_data_##n = { \
.buf = sdl_buf_##n, \
.read_buf = sdl_read_buf_##n, \
}; \
\
DEVICE_DT_INST_DEFINE(n, &sdl_display_init, NULL, \
&sdl_data_##n, \
&sdl_config_##n, \
POST_KERNEL, \
CONFIG_DISPLAY_INIT_PRIORITY, \
&sdl_display_api); \
\
static void sdl_display_cleanup_##n(void) \
{ \
sdl_display_cleanup(&sdl_data_##n); \
} \
\
NATIVE_TASK(sdl_display_cleanup_##n, ON_EXIT, 1);
DT_INST_FOREACH_STATUS_OKAY(DISPLAY_SDL_DEFINE)
static void display_sdl_options(void)
{
static struct args_struct_t sdl_display_options[] = {
{ .option = "display_zoom_pct",
.name = "pct",
.type = 'u',
.dest = (void *)&sdl_display_zoom_pct,
.descript = "Display zoom percentage (100 == 1:1 scale), "
"by default " STRINGIFY(CONFIG_SDL_DISPLAY_ZOOM_PCT)
" = CONFIG_SDL_DISPLAY_ZOOM_PCT"
},
ARG_TABLE_ENDMARKER
};
native_add_command_line_opts(sdl_display_options);
}
NATIVE_TASK(display_sdl_options, PRE_BOOT_1, 1);
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