/****************************************************************************
* apps/examples/lvgldemo/fbdev.c
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gábor Kiss-Vámosi <kisvegabor@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include "fbdev.h"
#include <nuttx/config.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxglib.h>
#include <nuttx/video/fb.h>
#include <nuttx/video/rgbcolors.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef FBDEV_PATH
# define FBDEV_PATH "/dev/fb0"
#endif
/****************************************************************************
* Private Types
****************************************************************************/
struct fb_state_s
{
int fd;
struct fb_videoinfo_s vinfo;
struct fb_planeinfo_s pinfo;
FAR void *fbmem;
};
/****************************************************************************
* Private Data
****************************************************************************/
struct fb_state_s state;
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: fbdev_init
*
* Description:
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
int fbdev_init(void)
{
FAR const char *fbdev = "/dev/fb0";
int ret;
/* Open the framebuffer driver */
state.fd = open(fbdev, O_RDWR);
if (state.fd < 0)
{
int errcode = errno;
fprintf(stderr, "ERROR: Failed to open %s: %d\n", fbdev, errcode);
return EXIT_FAILURE;
}
/* Get the characteristics of the framebuffer */
ret = ioctl(state.fd, FBIOGET_VIDEOINFO,
(unsigned long)((uintptr_t)&state.vinfo));
if (ret < 0)
{
int errcode = errno;
fprintf(stderr, "ERROR: ioctl(FBIOGET_VIDEOINFO) failed: %d\n",
errcode);
close(state.fd);
return EXIT_FAILURE;
}
printf("VideoInfo:\n");
printf(" fmt: %u\n", state.vinfo.fmt);
printf(" xres: %u\n", state.vinfo.xres);
printf(" yres: %u\n", state.vinfo.yres);
printf(" nplanes: %u\n", state.vinfo.nplanes);
ret = ioctl(state.fd, FBIOGET_PLANEINFO,
(unsigned long)((uintptr_t)&state.pinfo));
if (ret < 0)
{
int errcode = errno;
fprintf(stderr, "ERROR: ioctl(FBIOGET_PLANEINFO) failed: %d\n",
errcode);
close(state.fd);
return EXIT_FAILURE;
}
printf("PlaneInfo (plane 0):\n");
printf(" fbmem: %p\n", state.pinfo.fbmem);
printf(" fblen: %lu\n", (unsigned long)state.pinfo.fblen);
printf(" stride: %u\n", state.pinfo.stride);
printf(" display: %u\n", state.pinfo.display);
printf(" bpp: %u\n", state.pinfo.bpp);
/* Only these pixel depths are supported. viinfo.fmt is ignored, only
* certain color formats are supported.
*/
if (state.pinfo.bpp != 32 && state.pinfo.bpp != 16 &&
state.pinfo.bpp != 8 && state.pinfo.bpp != 1)
{
fprintf(stderr, "ERROR: bpp=%u not supported\n", state.pinfo.bpp);
close(state.fd);
return EXIT_FAILURE;
}
/* mmap() the framebuffer.
*
* NOTE: In the FLAT build the frame buffer address returned by the
* FBIOGET_PLANEINFO IOCTL command will be the same as the framebuffer
* address. mmap(), however, is the preferred way to get the framebuffer
* address because in the KERNEL build, it will perform the necessary
* address mapping to make the memory accessible to the application.
*/
state.fbmem = mmap(NULL, state.pinfo.fblen, PROT_READ|PROT_WRITE,
MAP_SHARED|MAP_FILE, state.fd, 0);
if (state.fbmem == MAP_FAILED)
{
int errcode = errno;
fprintf(stderr, "ERROR: ioctl(FBIOGET_PLANEINFO) failed: %d\n",
errcode);
close(state.fd);
return EXIT_FAILURE;
}
printf("Mapped FB: %p\n", state.fbmem);
return EXIT_SUCCESS;
}
/****************************************************************************
* Name: fbdev_flush
*
* Description:
* Flush a buffer to the marked area
*
* Input Parameters:
* x1 - Left coordinate
* y1 - Top coordinate
* x2 - Right coordinate
* y2 - Bottom coordinate
* color_p - A n array of colors
*
* Returned Value:
* None
*
****************************************************************************/
void fbdev_flush(int32_t x1, int32_t y1, int32_t x2, int32_t y2,
FAR const lv_color_t *color_p)
{
#ifdef CONFIG_LCD_UPDATE
struct nxgl_rect_s rect;
#endif
int32_t act_x1;
int32_t act_y1;
int32_t act_x2;
int32_t act_y2;
long int location = 0;
if (state.fbmem == NULL)
{
return;
}
/* Return if the area is out the screen */
if (x2 < 0)
{
return;
}
if (y2 < 0)
{
return;
}
if (x1 > state.vinfo.xres - 1)
{
return;
}
if (y1 > state.vinfo.yres - 1)
{
return;
}
/* Truncate the area to the screen */
act_x1 = x1 < 0 ? 0 : x1;
act_y1 = y1 < 0 ? 0 : y1;
act_x2 = x2 > state.vinfo.xres - 1 ? state.vinfo.xres - 1 : x2;
act_y2 = y2 > state.vinfo.yres - 1 ? state.vinfo.yres - 1 : y2;
if (state.pinfo.bpp == 8)
{
uint8_t *fbp8 = (uint8_t*)state.fbmem;
uint32_t x;
uint32_t y;
for (y = act_y1; y <= act_y2; y++)
{
for (x = act_x1; x <= act_x2; x++)
{
location = x + (y * state.vinfo.xres);
fbp8[location] = color_p->full;
color_p++;
}
color_p += x2 - act_x2;
}
}
if (state.pinfo.bpp == 16)
{
uint16_t *fbp16 = (uint16_t*)state.fbmem;
uint32_t x;
uint32_t y;
for (y = act_y1; y <= act_y2; y++)
{
for (x = act_x1; x <= act_x2; x++)
{
location = x + (y * state.vinfo.xres);
fbp16[location] = color_p->full;
color_p++;
}
color_p += x2 - act_x2;
}
}
if (state.pinfo.bpp == 24 || state.pinfo.bpp == 32)
{
uint32_t *fbp32 = (uint32_t*)state.fbmem;
uint32_t x;
uint32_t y;
for (y = act_y1; y <= act_y2; y++)
{
for (x = act_x1; x <= act_x2; x++)
{
location = x + (y * state.vinfo.xres);
fbp32[location] = color_p->full;
color_p++;
}
color_p += x2 - act_x2;
}
}
#ifdef CONFIG_LCD_UPDATE
rect.pt1.x = act_x1;
rect.pt1.y = act_y1;
rect.pt2.x = act_x2;
rect.pt2.y = act_y2;
ioctl(state.fd, FBIO_UPDATE, (unsigned long)((uintptr_t)&rect));
#endif
/* Tell the flushing is ready */
lv_flush_ready();
}
/****************************************************************************
* Name: fbdev_fill
*
* Description:
* Fill an area with a color
*
* Input Parameters:
* x1 - Left coordinate
* y1 - Top coordinate
* x2 - Right coordinate
* y2 - Bottom coordinate
* color - The fill color
*
* Returned Value:
* None
*
****************************************************************************/
void fbdev_fill(int32_t x1, int32_t y1, int32_t x2, int32_t y2,
lv_color_t color)
{
#ifdef CONFIG_LCD_UPDATE
struct nxgl_rect_s rect;
#endif
int32_t act_x1;
int32_t act_y1;
int32_t act_x2;
int32_t act_y2;
long int location = 0;
if (state.fbmem == NULL)
{
return;
}
/* Return if the area is out the screen */
if (x2 < 0)
{
return;
}
if (y2 < 0)
{
return;
}
if (x1 > state.vinfo.xres - 1)
{
return;
}
if (y1 > state.vinfo.yres - 1)
{
return;
}
/* Truncate the area to the screen */
act_x1 = x1 < 0 ? 0 : x1;
act_y1 = y1 < 0 ? 0 : y1;
act_x2 = x2 > state.vinfo.xres - 1 ? state.vinfo.xres - 1 : x2;
act_y2 = y2 > state.vinfo.yres - 1 ? state.vinfo.yres - 1 : y2;
if (state.pinfo.bpp == 8)
{
uint8_t *fbp8 = (uint8_t*)state.fbmem;
uint32_t x;
uint32_t y;
for (y = act_y1; y <= act_y2; y++)
{
for (x = act_x1; x <= act_x2; x++)
{
location = x + (y * state.vinfo.xres);
fbp8[location] = color.full;
}
}
}
if (state.pinfo.bpp == 16)
{
uint16_t *fbp16 = (uint16_t*)state.fbmem;
uint32_t x;
uint32_t y;
for (y = act_y1; y <= act_y2; y++)
{
for (x = act_x1; x <= act_x2; x++)
{
location = x + (y * state.vinfo.xres);
fbp16[location] = color.full;
}
}
}
if (state.pinfo.bpp == 24 || state.pinfo.bpp == 32)
{
uint32_t *fbp32 = (uint32_t*)state.fbmem;
uint32_t x;
uint32_t y;
for (y = act_y1; y <= act_y2; y++)
{
for (x = act_x1; x <= act_x2; x++)
{
location = x + (y * state.vinfo.xres);
fbp32[location] = color.full;
}
}
}
#ifdef CONFIG_LCD_UPDATE
rect.pt1.x = act_x1;
rect.pt1.y = act_y1;
rect.pt2.x = act_x2;
rect.pt2.y = act_y2;
ioctl(state.fd, FBIO_UPDATE, (unsigned long)((uintptr_t)&rect));
#endif
}
/****************************************************************************
* Name: fbdev_map
*
* Description:
* Write an array of pixels (like an image) to the marked area
*
* Input Parameters:
* x1 - Left coordinate
* y1 - Top coordinate
* x2 - Right coordinate
* y2 - Bottom coordinate
* color_p - An array of colors
*
* Returned Value:
* None
*
****************************************************************************/
void fbdev_map(int32_t x1, int32_t y1, int32_t x2, int32_t y2,
FAR const lv_color_t *color_p)
{
#ifdef CONFIG_LCD_UPDATE
struct nxgl_rect_s rect;
#endif
int32_t act_x1;
int32_t act_y1;
int32_t act_x2;
int32_t act_y2;
long int location = 0;
if (state.fbmem == NULL)
{
return;
}
/* Return if the area is out the screen */
if (x2 < 0)
{
return;
}
if (y2 < 0)
{
return;
}
if (x1 > state.vinfo.xres - 1)
{
return;
}
if (y1 > state.vinfo.yres - 1)
{
return;
}
/* Truncate the area to the screen */
act_x1 = x1 < 0 ? 0 : x1;
act_y1 = y1 < 0 ? 0 : y1;
act_x2 = x2 > state.vinfo.xres - 1 ? state.vinfo.xres - 1 : x2;
act_y2 = y2 > state.vinfo.yres - 1 ? state.vinfo.yres - 1 : y2;
if (state.pinfo.bpp == 8)
{
uint8_t *fbp8 = (uint8_t*)state.fbmem;
uint32_t x;
uint32_t y;
for (y = act_y1; y <= act_y2; y++)
{
for (x = act_x1; x <= act_x2; x++)
{
location = x + (y * state.vinfo.xres);
fbp8[location] = color_p->full;
color_p++;
}
color_p += x2 - act_x2;
}
}
if (state.pinfo.bpp == 16)
{
uint16_t *fbp16 = (uint16_t*)state.fbmem;
uint32_t x;
uint32_t y;
for (y = act_y1; y <= act_y2; y++)
{
for (x = act_x1; x <= act_x2; x++)
{
location = x + (y * state.vinfo.xres);
fbp16[location] = color_p->full;
color_p++;
}
color_p += x2 - act_x2;
}
}
if (state.pinfo.bpp == 24 || state.pinfo.bpp == 32)
{
uint32_t *fbp32 = (uint32_t*)state.fbmem;
uint32_t x;
uint32_t y;
for (y = act_y1; y <= act_y2; y++)
{
for (x = act_x1; x <= act_x2; x++)
{
location = x + (y * state.vinfo.xres);
fbp32[location] = color_p->full;
color_p++;
}
color_p += x2 - act_x2;
}
}
#ifdef CONFIG_LCD_UPDATE
rect.pt1.x = act_x1;
rect.pt1.y = act_y1;
rect.pt2.x = act_x2;
rect.pt2.y = act_y2;
ioctl(state.fd, FBIO_UPDATE, (unsigned long)((uintptr_t)&rect));
#endif
}