diff -r 000000000000 -r 1918ee327afb examples/qws/framebuffer/main.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/qws/framebuffer/main.c	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,586 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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;
+}