WebSVN – HelenOS-historic – Diff – /kernel/trunk/genarch/src/fb/fb.c

 #include "helenos.xbm"
 SPINLOCK_INITIALIZE(fb_lock);
-static __u8 *fbaddress=NULL;
+static __u8 *fbaddress = NULL;
-static int xres,yres;
-static int position=0;
-static int columns=0;
-static int rows=0;
-static int pixelbytes=0;
-#define COL_WIDTH   8
-#define ROW_HEIGHT  (FONT_SCANLINES)
-#define ROW_PIX     (xres*ROW_HEIGHT*pixelbytes)
-#define BGCOLOR   0x000080
-#define FGCOLOR   0xffff00
-#define LOGOCOLOR 0x2020b0
-#define RED(x,bits)    ((x >> (16+8-bits)) & ((1<<bits)-1))
-#define GREEN(x,bits)  ((x >> (8+8-bits)) & ((1<<bits)-1))
-#define BLUE(x,bits)   ((x >> (8-bits)) & ((1<<bits)-1))
+static unsigned int xres = 0;
+static unsigned int yres = 0;
+static unsigned int scanline = 0;
+static unsigned int pixelbytes = 0;
+static unsigned int position = 0;
+static unsigned int columns = 0;
+static unsigned int rows = 0;
+#define COL_WIDTH   8
+#define ROW_BYTES   (scanline * FONT_SCANLINES)
+#define BGCOLOR     0x000080
+#define FGCOLOR     0xffff00
+#define LOGOCOLOR   0x2020b0
+#define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
+#define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
+#define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
-#define POINTPOS(x,y)   ((y*xres+x)*pixelbytes)
+#define POINTPOS(x, y)  (y * scanline + x * pixelbytes)
 /***************************************************************/
 /* Pixel specific fuctions */
-static void (*putpixel)(int x,int y,int color);
+static void (*putpixel)(unsigned int x, unsigned int y, int color);
-static int (*getpixel)(int x,int y);
+static int (*getpixel)(unsigned int x, unsigned int y);
 /** Put pixel - 24-bit depth, 1 free byte */
-static void putpixel_4byte(int x,int y,int color)
+static void putpixel_4byte(unsigned int x, unsigned int y, int color)
+{
-    int startbyte = POINTPOS(x,y);
-    *((__u32 *)(fbaddress+startbyte)) = color;
+    *((__u32 *)(fbaddress + POINTPOS(x, y))) = color;
+}
-/** Return pixel color */
+/** Return pixel color - 24-bit depth, 1 free byte */
-static int getpixel_4byte(int x,int y)
+static int getpixel_4byte(unsigned int x, unsigned int y)
+{
-    int startbyte = POINTPOS(x,y);
-    return *((__u32 *)(fbaddress+startbyte)) & 0xffffff;
+    return *((__u32 *)(fbaddress + POINTPOS(x, y))) & 0xffffff;
+}
-/** Draw pixel of given color on screen - 24-bit depth */
+/** Put pixel - 24-bit depth */
-static void putpixel_3byte(int x,int y,int color)
+static void putpixel_3byte(unsigned int x, unsigned int y, int color)
+{
-    int startbyte = POINTPOS(x,y);
+    unsigned int startbyte = POINTPOS(x, y);
-    fbaddress[startbyte] = RED(color,8);
+    fbaddress[startbyte] = RED(color, 8);
-    fbaddress[startbyte+1] = GREEN(color,8);
+    fbaddress[startbyte + 1] = GREEN(color, 8);
-    fbaddress[startbyte+2] = BLUE(color,8);
+    fbaddress[startbyte + 2] = BLUE(color, 8);
+}
+/** Return pixel color - 24-bit depth */
-static int getpixel_3byte(int x,int y)
+static int getpixel_3byte(unsigned int x, unsigned int y)
+{
-    int startbyte = POINTPOS(x,y);
+    unsigned int startbyte = POINTPOS(x, y);
-    int result;
-    result = fbaddress[startbyte] << 16 \
+    return fbaddress[startbyte] << 16 | fbaddress[startbyte + 1] << 8 | fbaddress[startbyte + 2];
-        | fbaddress[startbyte+1] << 8 \
-        | fbaddress[startbyte+2];
-    return result;
+}
 /** Put pixel - 16-bit depth (5:6:6) */
-static void putpixel_2byte(int x,int y,int color)
+static void putpixel_2byte(unsigned int x, unsigned int y, int color)
+{
-    int startbyte = POINTPOS(x,y);
-    int compcolor;
     /* 5-bit, 5-bits, 5-bits */
-    compcolor = RED(color,5) << 11 \
-        | GREEN(color,6) << 5 \
-        | BLUE(color,5);
-    *((__u16 *)(fbaddress+startbyte)) = compcolor;
+    *((__u16 *)(fbaddress + POINTPOS(x, y))) = RED(color, 5) << 11 | GREEN(color, 6) << 5 | BLUE(color, 5);
-}
-static int getpixel_2byte(int x,int y)
-{
-    int startbyte = POINTPOS(x,y);
-    int color;
-    int red,green,blue;
-    color = *((__u16 *)(fbaddress+startbyte));
-    red = (color >> 11) & 0x1f;
-    green = (color >> 5) & 0x3f;
-    blue = color & 0x1f;
-    return (red << (16+3)) | (green << (8+2)) | (blue << 3);
+}
-/** Put pixel - 8-bit depth (3:2:3) */
+/** Return pixel color - 16-bit depth (5:6:6) */
-static void putpixel_1byte(int x,int y,int color)
+static int getpixel_2byte(unsigned int x, unsigned int y)
+{
-    int compcolor;
-    /* 3-bit, 2-bits, 3-bits */
-    compcolor = RED(color,3) << 5 \
+    int color = *((__u16 *)(fbaddress + POINTPOS(x, y)));
-        | GREEN(color,2) << 3 \
-        | BLUE(color,3);
-    fbaddress[POINTPOS(x,y)] = compcolor;
+    return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
+}
+/** Put pixel - 8-bit depth (3:2:3) */
-static int getpixel_1byte(int x,int y)
+static void putpixel_1byte(unsigned int x, unsigned int y, int color)
+{
-    int color;
-    int red,green,blue;
-    color = fbaddress[POINTPOS(x,y)];
-    red = (color >> 5) & 0x7;
-    green = (color >> 3) & 0x3;
-    blue = color & 0x7;
-    return (red << (16+5)) | (green << (8+6)) | blue << 5;
+    fbaddress[POINTPOS(x, y)] = RED(color, 3) << 5 | GREEN(color, 2) << 3 | BLUE(color, 3);
+}
-static void clear_line(int y);
-/** Scroll screen one row up */
+/** Return pixel color - 8-bit depth (3:2:3) */
-static void scroll_screen(void)
+static int getpixel_1byte(unsigned int x, unsigned int y)
+{
-    int i;
+    int color = fbaddress[POINTPOS(x, y)];
-    memcpy((void *) fbaddress, (void *) &fbaddress[ROW_PIX], (xres*yres*pixelbytes)-ROW_PIX);
+    return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
-    /* Clear last row */
-    for (i=0; i < ROW_HEIGHT;i++)
-        clear_line((rows-1)*ROW_HEIGHT+i);
+}
-/***************************************************************/
-/* Screen specific function */
 /** Fill line with color BGCOLOR */
-static void clear_line(int y)
+static void clear_line(unsigned int y)
+{
-    int x;
+    unsigned int x;
-    for (x=0; x<xres;x++)
+    for (x = 0; x < xres; x++)
-        (*putpixel)(x,y,BGCOLOR);
+        (*putpixel)(x, y, BGCOLOR);
+}
 /** Fill screen with background color */
 static void clear_screen(void)
+{
-    int y;
+    unsigned int y;
-    for (y=0; y<yres;y++)
+    for (y = 0; y < yres; y++)
         clear_line(y);
+}
+/** Scroll screen one row up */
+static void scroll_screen(void)
+{
+    unsigned int i;
+    memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES], scanline * yres - ROW_BYTES);
+    /* Clear last row */
+    for (i = 0; i < FONT_SCANLINES; i++)
+        clear_line((rows - 1) * FONT_SCANLINES + i);
+}
-static void invert_pixel(int x, int y)
+static void invert_pixel(unsigned int x, unsigned int y)
+{
-    (*putpixel)(x,y, ~(*getpixel)(x,y));
+    (*putpixel)(x, y, ~(*getpixel)(x, y));
+}
 /** Draw one line of glyph at a given position */
-static void draw_glyph_line(int glline, int x, int y)
+static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
+{
-    int i;
+    unsigned int i;
-    for (i=0; i < 8; i++)
+    for (i = 0; i < 8; i++)
-        if (glline & (1 << (7-i))) {
+        if (glline & (1 << (7 - i))) {
-            (*putpixel)(x+i,y,FGCOLOR);
+            (*putpixel)(x + i, y, FGCOLOR);
         } else
-            (*putpixel)(x+i,y,BGCOLOR);
+            (*putpixel)(x + i, y, BGCOLOR);
+}
 /***************************************************************/
 /* Character-console functions */
 /** Draw character at given position */
-static void draw_glyph(__u8 glyph, int col, int row)
+static void draw_glyph(__u8 glyph, unsigned int col, unsigned int row)
+{
-    int y;
+    unsigned int y;
-    for (y=0; y < FONT_SCANLINES; y++)
+    for (y = 0; y < FONT_SCANLINES; y++)
-        draw_glyph_line(fb_font[glyph*FONT_SCANLINES+y],
+        draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col * COL_WIDTH, row * FONT_SCANLINES + y);
-                col*COL_WIDTH, row*ROW_HEIGHT+y);
+}
 /** Invert character at given position */
-static void invert_char(int col, int row)
+static void invert_char(unsigned int col, unsigned int row)
+{
+    unsigned int x;
-    int x,y;
+    unsigned int y;
-    for (x=0; x < COL_WIDTH; x++)
+    for (x = 0; x < COL_WIDTH; x++)
-        for (y=0; y < FONT_SCANLINES; y++)
+        for (y = 0; y < FONT_SCANLINES; y++)
-            invert_pixel(col*COL_WIDTH+x,row*ROW_HEIGHT+y);
+            invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES + y);
+}
 /** Draw character at default position */
 static void draw_char(char chr)
+{
-    draw_glyph(chr, position % columns, position/columns);
+    draw_glyph(chr, position % columns, position / columns);
+}
-static void draw_logo(int startx, int starty)
+static void draw_logo(unsigned int startx, unsigned int starty)
+{
+    unsigned int x;
-    int x,y;
+    unsigned int y;
-    int byte;
+    unsigned int byte;
-    int rowbytes;
+    unsigned int rowbytes;
-    rowbytes = (helenos_width-1)/8 + 1;
+    rowbytes = (helenos_width - 1) / 8 + 1;
-    for (y=0;y < helenos_height;y++)
+    for (y = 0; y < helenos_height; y++)
-        for (x=0;x < helenos_width; x++ ) {
+        for (x = 0; x < helenos_width; x++) {
-            byte = helenos_bits[rowbytes*y + x/8];
+            byte = helenos_bits[rowbytes * y + x / 8];
             byte >>= x % 8;
             if (byte & 1)
-                (*putpixel)(startx+x,starty+y,LOGOCOLOR);
+                (*putpixel)(startx + x, starty + y, LOGOCOLOR);
+        }
+}
 /***************************************************************/
 /* Stdout specific functions */
 static void invert_cursor(void)
+{
-    invert_char(position % columns, position/columns);
+    invert_char(position % columns, position / columns);
+}
 /** Print character to screen
+ *
  *  Emulate basic terminal commands
  */
 static void fb_putchar(chardev_t *dev, char ch)
+{
     spinlock_lock(&fb->lock);
-    if (ch == '\n') {
+    switch (ch) {
+        case '\n':
-        invert_cursor();
+            invert_cursor();
-        position += columns;
+            position += columns;
-        position -= position % columns;
+            position -= position % columns;
+            break;
-    } else if (ch == '\r') {
+        case '\r':
-        invert_cursor();
+            invert_cursor();
-        position -= position % columns;
+            position -= position % columns;
+            break;
-    } else if (ch == '\b') {
+        case '\b':
-        invert_cursor();
+            invert_cursor();
-        if (position % columns)
+            if (position % columns)
-            position--;
+                position--;
+            break;
-    } else if (ch == '\t') {
+        case '\t':
-        invert_cursor();
+            invert_cursor();
-        do {
+            do {
-            draw_char(' ');
+                draw_char(' ');
+                position++;
+            } while (position % 8);
+            break;
+        default:
+            draw_char(ch);
             position++;
-        } while (position % 8);
-    } else {
-        draw_char(ch);
-        position++;
+    }
-    if (position >= columns*rows) {
+    if (position >= columns * rows) {
         position -= columns;
         scroll_screen();
+    }
     invert_cursor();
     spinlock_unlock(&fb->lock);
+}
 static chardev_t framebuffer;
 static chardev_operations_t fb_ops = {
 };
 /** Initialize framebuffer as a chardev output device
+ *
- * @param addr Address of framebuffer
+ * @param addr Address of theframebuffer
- * @param x X resolution
+ * @param x    Screen width in pixels
- * @param y Y resolution
+ * @param y    Screen height in pixels
- * @param bytes Bytes per pixel (2,3,4)
+ * @param bpp  Bits per pixel (8, 16, 24, 32)
+ * @param scan Bytes per one scanline
+ *
  */
-void fb_init(__address addr, int x, int y, int bytes)
+void fb_init(__address addr, unsigned int x, unsigned int y, unsigned int bpp, unsigned int scan)
+{
-    fbaddress = (unsigned char *)addr;
-    switch (bytes) {
+    switch (bpp) {
-    case 1:
+        case 8:
-        putpixel = putpixel_1byte;
+            putpixel = putpixel_1byte;
-        getpixel = getpixel_1byte;
+            getpixel = getpixel_1byte;
+            pixelbytes = 1;
-        break;
+            break;
-    case 2:
+        case 16:
-        putpixel = putpixel_2byte;
+            putpixel = putpixel_2byte;
-        getpixel = getpixel_2byte;
+            getpixel = getpixel_2byte;
+            pixelbytes = 2;
-        break;
+            break;
-    case 3:
+        case 24:
-        putpixel = putpixel_3byte;
+            putpixel = putpixel_3byte;
-        getpixel = getpixel_3byte;
+            getpixel = getpixel_3byte;
+            pixelbytes = 3;
-        break;
+            break;
-    case 4:
+        case 32:
-        putpixel = putpixel_4byte;
+            putpixel = putpixel_4byte;
-        getpixel = getpixel_4byte;
+            getpixel = getpixel_4byte;
+            pixelbytes = 4;
-        break;
+            break;
-    default:
+        default:
-        panic("Unsupported color depth");
+            panic("Unsupported bpp");
+    }
+    fbaddress = (unsigned char *) addr;
     xres = x;
     yres = y;
-    pixelbytes = bytes;
+    scanline = scan;
-    rows = y/ROW_HEIGHT;
+    rows = y / FONT_SCANLINES;
-    columns = x/COL_WIDTH;
+    columns = x / COL_WIDTH;
     clear_screen();
-    draw_logo(xres-helenos_width, 0);
+    draw_logo(xres - helenos_width, 0);
     invert_cursor();
     chardev_initialize("fb", &framebuffer, &fb_ops);
     stdout = &framebuffer;
+}

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/genarch/src/fb/fb.c – Rev 896 → 1135