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qt5base-lts/examples/qws/framebuffer/main.c
Jason McDonald 5635823e17 Remove "All rights reserved" line from license headers. 
As in the past, to avoid rewriting various autotests that contain
line-number information, an extra blank line has been inserted at the
end of the license text to ensure that this commit does not change the
total number of lines in the license header.

Change-Id: I311e001373776812699d6efc045b5f742890c689
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
2012-01-30 03:54:59 +01:00

586 lines
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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * 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.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <linux/kd.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <string.h>
#include <errno.h>
struct fb_var_screeninfo vinfo;
struct fb_fix_screeninfo finfo;
char *frameBuffer = 0;
int fbFd = 0;
int ttyFd = 0;
void printFixedInfo()
{
printf("Fixed screen info:\n"
"\tid: %s\n"
"\tsmem_start: 0x%lx\n"
"\tsmem_len: %d\n"
"\ttype: %d\n"
"\ttype_aux: %d\n"
"\tvisual: %d\n"
"\txpanstep: %d\n"
"\typanstep: %d\n"
"\tywrapstep: %d\n"
"\tline_length: %d\n"
"\tmmio_start: 0x%lx\n"
"\tmmio_len: %d\n"
"\taccel: %d\n"
"\n",
finfo.id, finfo.smem_start, finfo.smem_len, finfo.type,
finfo.type_aux, finfo.visual, finfo.xpanstep, finfo.ypanstep,
finfo.ywrapstep, finfo.line_length, finfo.mmio_start,
finfo.mmio_len, finfo.accel);
}
void printVariableInfo()
{
printf("Variable screen info:\n"
"\txres: %d\n"
"\tyres: %d\n"
"\txres_virtual: %d\n"
"\tyres_virtual: %d\n"
"\tyoffset: %d\n"
"\txoffset: %d\n"
"\tbits_per_pixel: %d\n"
"\tgrayscale: %d\n"
"\tred: offset: %2d, length: %2d, msb_right: %2d\n"
"\tgreen: offset: %2d, length: %2d, msb_right: %2d\n"
"\tblue: offset: %2d, length: %2d, msb_right: %2d\n"
"\ttransp: offset: %2d, length: %2d, msb_right: %2d\n"
"\tnonstd: %d\n"
"\tactivate: %d\n"
"\theight: %d\n"
"\twidth: %d\n"
"\taccel_flags: 0x%x\n"
"\tpixclock: %d\n"
"\tleft_margin: %d\n"
"\tright_margin: %d\n"
"\tupper_margin: %d\n"
"\tlower_margin: %d\n"
"\thsync_len: %d\n"
"\tvsync_len: %d\n"
"\tsync: %d\n"
"\tvmode: %d\n"
"\n",
vinfo.xres, vinfo.yres, vinfo.xres_virtual, vinfo.yres_virtual,
vinfo.xoffset, vinfo.yoffset, vinfo.bits_per_pixel, vinfo.grayscale,
vinfo.red.offset, vinfo.red.length, vinfo.red.msb_right,
vinfo.green.offset, vinfo.green.length, vinfo.green.msb_right,
vinfo.blue.offset, vinfo.blue.length, vinfo.blue.msb_right,
vinfo.transp.offset, vinfo.transp.length, vinfo.transp.msb_right,
vinfo.nonstd, vinfo.activate, vinfo.height, vinfo.width,
vinfo.accel_flags, vinfo.pixclock, vinfo.left_margin,
vinfo.right_margin, vinfo.upper_margin, vinfo.lower_margin,
vinfo.hsync_len, vinfo.vsync_len, vinfo.sync, vinfo.vmode);
}
long switchToGraphicsMode()
{
const char *const devs[] = {"/dev/tty0", "/dev/tty", "/dev/console", 0};
const char * const *dev;
long oldMode = KD_TEXT;
for (dev = devs; *dev; ++dev) {
ttyFd = open(*dev, O_RDWR);
if (ttyFd != -1)
break;
printf("Opening tty device %s failed: %s\n", *dev, strerror(errno));
}
ioctl(ttyFd, KDGETMODE, &oldMode);
if (oldMode == KD_GRAPHICS) {
printf("Was in graphics mode already. Skipping\n");
return oldMode;
}
int ret = ioctl(ttyFd, KDSETMODE, KD_GRAPHICS);
if (ret == -1) {
printf("Switch to graphics mode failed: %s\n", strerror(errno));
return oldMode;
}
printf("Successfully switched to graphics mode.\n\n");
return oldMode;
}
void restoreTextMode(long oldMode)
{
if (ttyFd == -1)
return;
ioctl(ttyFd, KDSETMODE, oldMode);
close(ttyFd);
}
struct fb_cmap oldPalette;
struct fb_cmap palette;
int paletteSize = 0;
void initPalette_16()
{
if (finfo.type == FB_TYPE_PACKED_PIXELS) {
// We'll setup a grayscale map for 4bpp linear
int val = 0;
int i;
for (i = 0; i < 16; ++i) {
palette.red[i] = (val << 8) | val;
palette.green[i] = (val << 8) | val;
palette.blue[i] = (val << 8) | val;
val += 17;
}
return;
}
// Default 16 colour palette
unsigned char reds[16] = { 0x00, 0x7F, 0xBF, 0xFF, 0xFF, 0xA2,
0x00, 0xFF, 0xFF, 0x00, 0x7F, 0x7F,
0x00, 0x00, 0x00, 0x82 };
unsigned char greens[16] = { 0x00, 0x7F, 0xBF, 0xFF, 0x00, 0xC5,
0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00,
0x00, 0x7F, 0x7F, 0x7F };
unsigned char blues[16] = { 0x00, 0x7F, 0xBF, 0xFF, 0x00, 0x11,
0xFF, 0x00, 0xFF, 0xFF, 0x00, 0x7F,
0x7F, 0x7F, 0x00, 0x00 };
int i;
for (i = 0; i < 16; ++i) {
palette.red[i] = ((reds[i]) << 8) | reds[i];
palette.green[i] = ((greens[i]) << 8) | greens[i];
palette.blue[i] = ((blues[i]) << 8) | blues[i];
palette.transp[i] = 0;
}
}
void initPalette_256()
{
if (vinfo.grayscale) {
int i;
for (i = 0; i < 256; ++i) {
unsigned short c = (i << 8) | i;
palette.red[i] = c;
palette.green[i] = c;
palette.blue[i] = c;
palette.transp[i] = 0;
}
return;
}
// 6x6x6 216 color cube
int i = 0;
int ir, ig, ib;
for (ir = 0x0; ir <= 0xff; ir += 0x33) {
for (ig = 0x0; ig <= 0xff; ig += 0x33) {
for (ib = 0x0; ib <= 0xff; ib += 0x33) {
palette.red[i] = (ir << 8)|ir;
palette.green[i] = (ig << 8)|ig;
palette.blue[i] = (ib << 8)|ib;
palette.transp[i] = 0;
++i;
}
}
}
}
void initPalette()
{
switch (vinfo.bits_per_pixel) {
case 8: paletteSize = 256; break;
case 4: paletteSize = 16; break;
default: break;
}
if (!paletteSize)
return; /* not using a palette */
/* read old palette */
oldPalette.start = 0;
oldPalette.len = paletteSize;
oldPalette.red = (unsigned short*)malloc(sizeof(unsigned short)*paletteSize);
oldPalette.green = (unsigned short*)malloc(sizeof(unsigned short)*paletteSize);
oldPalette.blue=(unsigned short*)malloc(sizeof(unsigned short)*paletteSize);
oldPalette.transp=(unsigned short*)malloc(sizeof(unsigned short)*paletteSize);
if (ioctl(ttyFd, FBIOGETCMAP, &oldPalette) == -1)
perror("initPalette: error reading palette");
/* create new palette */
palette.start = 0;
palette.len = paletteSize;
palette.red = (unsigned short*)malloc(sizeof(unsigned short)*paletteSize);
palette.green = (unsigned short*)malloc(sizeof(unsigned short)*paletteSize);
palette.blue = (unsigned short*)malloc(sizeof(unsigned short)*paletteSize);
palette.transp = (unsigned short*)malloc(sizeof(unsigned short)*paletteSize);
switch (paletteSize) {
case 16: initPalette_16(); break;
case 256: initPalette_256(); break;
default: break;
}
/* set new palette */
if (ioctl(ttyFd, FBIOPUTCMAP, &palette) == -1)
perror("initPalette: error setting palette");
}
void resetPalette()
{
if (paletteSize == 0)
return;
if (ioctl(ttyFd, FBIOPUTCMAP, &oldPalette) == -1)
perror("resetPalette");
free(oldPalette.red);
free(oldPalette.green);
free(oldPalette.blue);
free(oldPalette.transp);
free(palette.red);
free(palette.green);
free(palette.blue);
free(palette.transp);
}
void drawRect_rgb32(int x0, int y0, int width, int height, int color)
{
const int bytesPerPixel = 4;
const int stride = finfo.line_length / bytesPerPixel;
int *dest = (int*)(frameBuffer)
+ (y0 + vinfo.yoffset) * stride
+ (x0 + vinfo.xoffset);
int x, y;
for (y = 0; y < height; ++y) {
for (x = 0; x < width; ++x) {
dest[x] = color;
}
dest += stride;
}
}
void drawRect_rgb18(int x0, int y0, int width, int height, int color)
{
const int bytesPerPixel = 3;
const int stride = finfo.line_length - width * bytesPerPixel;
const int red = (color & 0xff0000) >> 16;
const int green = (color & 0xff00) >> 8;
const int blue = (color & 0xff);
const unsigned int packed = (blue >> 2) |
((green >> 2) << 6) |
((red >> 2) << 12);
const char color18[3] = { packed & 0xff,
(packed & 0xff00) >> 8,
(packed & 0xff0000) >> 16 };
char *dest = (char*)(frameBuffer)
+ (y0 + vinfo.yoffset) * stride
+ (x0 + vinfo.xoffset);
int x, y;
for (y = 0; y < height; ++y) {
for (x = 0; x < width; ++x) {
*dest++ = color18[0];
*dest++ = color18[1];
*dest++ = color18[2];
}
dest += stride;
}
}
void drawRect_rgb16(int x0, int y0, int width, int height, int color)
{
const int bytesPerPixel = 2;
const int stride = finfo.line_length / bytesPerPixel;
const int red = (color & 0xff0000) >> (16 + 3);
const int green = (color & 0xff00) >> (8 + 2);
const int blue = (color & 0xff) >> 3;
const short color16 = blue | (green << 5) | (red << (5 + 6));
short *dest = (short*)(frameBuffer)
+ (y0 + vinfo.yoffset) * stride
+ (x0 + vinfo.xoffset);
int x, y;
for (y = 0; y < height; ++y) {
for (x = 0; x < width; ++x) {
dest[x] = color16;
}
dest += stride;
}
}
void drawRect_rgb15(int x0, int y0, int width, int height, int color)
{
const int bytesPerPixel = 2;
const int stride = finfo.line_length / bytesPerPixel;
const int red = (color & 0xff0000) >> (16 + 3);
const int green = (color & 0xff00) >> (8 + 3);
const int blue = (color & 0xff) >> 3;
const short color15 = blue | (green << 5) | (red << (5 + 5));
short *dest = (short*)(frameBuffer)
+ (y0 + vinfo.yoffset) * stride
+ (x0 + vinfo.xoffset);
int x, y;
for (y = 0; y < height; ++y) {
for (x = 0; x < width; ++x) {
dest[x] = color15;
}
dest += stride;
}
}
void drawRect_palette(int x0, int y0, int width, int height, int color)
{
const int bytesPerPixel = 1;
const int stride = finfo.line_length / bytesPerPixel;
const unsigned char color8 = color;
unsigned char *dest = (unsigned char*)(frameBuffer)
+ (y0 + vinfo.yoffset) * stride
+ (x0 + vinfo.xoffset);
int x, y;
for (y = 0; y < height; ++y) {
for (x = 0; x < width; ++x) {
dest[x] = color8;
}
dest += stride;
}
}
void drawRect(int x0, int y0, int width, int height, int color)
{
switch (vinfo.bits_per_pixel) {
case 32:
drawRect_rgb32(x0, y0, width, height, color);
break;
case 18:
drawRect_rgb18(x0, y0, width, height, color);
break;
case 16:
drawRect_rgb16(x0, y0, width, height, color);
break;
case 15:
drawRect_rgb15(x0, y0, width, height, color);
break;
case 8:
drawRect_palette(x0, y0, width, height, color);
break;
case 4:
drawRect_palette(x0, y0, width, height, color);
break;
default:
printf("Warning: drawRect() not implemented for color depth %i\n",
vinfo.bits_per_pixel);
break;
}
}
#define PERFORMANCE_RUN_COUNT 5
void performSpeedTest(void* fb, int fbSize)
{
int i, j, run;
struct timeval startTime, endTime;
unsigned long long results[PERFORMANCE_RUN_COUNT];
unsigned long long average;
unsigned int* testImage;
unsigned int randData[17] = {
0x3A428472, 0x724B84D3, 0x26B898AB, 0x7D980E3C, 0x5345A084,
0x6779B66B, 0x791EE4B4, 0x6E8EE3CC, 0x63AF504A, 0x18A21B33,
0x0E26EB73, 0x022F708E, 0x1740F3B0, 0x7E2C699D, 0x0E8A570B,
0x5F2C22FB, 0x6A742130
};
printf("Frame Buffer Performance test...\n");
for (run=0; run<PERFORMANCE_RUN_COUNT; ++run) {
/* Generate test image with random(ish) data: */
testImage = (unsigned int*) malloc(fbSize);
j = run;
for (i=0; i < (int)(fbSize / sizeof(int)); ++i) {
testImage[i] = randData[j];
j++;
if (j >= 17)
j = 0;
}
gettimeofday(&startTime, NULL);
memcpy(fb, testImage, fbSize);
gettimeofday(&endTime, NULL);
long secsDiff = endTime.tv_sec - startTime.tv_sec;
results[run] = secsDiff * 1000000 + (endTime.tv_usec - startTime.tv_usec);
free(testImage);
}
average = 0;
for (i=0; i<PERFORMANCE_RUN_COUNT; ++i)
average += results[i];
average = average / PERFORMANCE_RUN_COUNT;
printf(" Average: %llu usecs\n", average);
printf(" Bandwidth: %.03f MByte/Sec\n", (fbSize / 1048576.0) / ((double)average / 1000000.0));
printf(" Max. FPS: %.03f fps\n\n", 1000000.0 / (double)average);
/* Clear the framebuffer back to black again: */
memset(fb, 0, fbSize);
}
int main(int argc, char **argv)
{
long int screensize = 0;
int doGraphicsMode = 1;
long oldKdMode = KD_TEXT;
const char *devfile = "/dev/fb0";
int nextArg = 1;
if (nextArg < argc) {
if (strncmp("nographicsmodeswitch", argv[nextArg],
strlen("nographicsmodeswitch")) == 0)
{
++nextArg;
doGraphicsMode = 0;
}
}
if (nextArg < argc)
devfile = argv[nextArg++];
/* Open the file for reading and writing */
fbFd = open(devfile, O_RDWR);
if (fbFd == -1) {
perror("Error: cannot open framebuffer device");
exit(1);
}
printf("The framebuffer device was opened successfully.\n\n");
/* Get fixed screen information */
if (ioctl(fbFd, FBIOGET_FSCREENINFO, &finfo) == -1) {
perror("Error reading fixed information");
exit(2);
}
printFixedInfo();
/* Figure out the size of the screen in bytes */
screensize = finfo.smem_len;
/* Map the device to memory */
frameBuffer = (char *)mmap(0, screensize,
PROT_READ | PROT_WRITE, MAP_SHARED,
fbFd, 0);
if (frameBuffer == MAP_FAILED) {
perror("Error: Failed to map framebuffer device to memory");
exit(4);
}
printf("The framebuffer device was mapped to memory successfully.\n"
"\n");
if (doGraphicsMode)
oldKdMode = switchToGraphicsMode();
/* Get variable screen information */
if (ioctl(fbFd, FBIOGET_VSCREENINFO, &vinfo) == -1) {
perror("Error reading variable information");
exit(3);
}
printVariableInfo();
performSpeedTest(frameBuffer, screensize);
initPalette();
if (paletteSize == 0) {
printf("Will draw 3 rectangles on the screen,\n"
"they should be colored red, green and blue (in that order).\n");
drawRect(vinfo.xres / 8, vinfo.yres / 8,
vinfo.xres / 4, vinfo.yres / 4,
0xffff0000);
drawRect(vinfo.xres * 3 / 8, vinfo.yres * 3 / 8,
vinfo.xres / 4, vinfo.yres / 4,
0xff00ff00);
drawRect(vinfo.xres * 5 / 8, vinfo.yres * 5 / 8,
vinfo.xres / 4, vinfo.yres / 4,
0xff0000ff);
} else {
printf("Will rectangles from the 16 first entries in the color palette"
" on the screen\n");
int y;
int x;
for (y = 0; y < 4; ++y) {
for (x = 0; x < 4; ++x) {
drawRect(vinfo.xres / 4 * x, vinfo.yres / 4 * y,
vinfo.xres / 4, vinfo.yres / 4,
4 * y + x);
}
}
}
sleep(5);
resetPalette();
printf(" Done.\n");
if (doGraphicsMode)
restoreTextMode(oldKdMode);
munmap(frameBuffer, screensize);
close(fbFd);
return 0;
}
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