Changeset 51baa8a in mainline for kernel/genarch/src/fb/fb.c

Timestamp:

2007-01-26T17:04:42Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

6f4495f5

Parents:

e71a61d

Message:

Don't write to frame buffer memory, which is past the resolution.
This fixes Ticket #17

Coding style a formatting changes in the frame buffer code.

File:

• kernel/genarch/src/fb/fb.c (modified) (16 diffs)

kernel/genarch/src/fb/fb.c

@@ -82 +82 @@
 #define LOGOCOLOR       0x2020b0
 
-#define RED(x, bits)    ((x >> (16 + 8 - bits)) & ((1 << bits) - 1))
+#define RED(x, bits)    ((x >> (8 + 8 + 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))
@@ -112 +112 @@
 static void bgr_byte0888(void *dst, int rgb)
 {
-        *((uint32_t *) dst) = BLUE(rgb, 8) << 16 | GREEN(rgb, 8) << 8 | RED(rgb,
-                8);
+        *((uint32_t *) dst) = BLUE(rgb, 8) << 16 | GREEN(rgb, 8) << 8 |
+            RED(rgb, 8);
 }
 
@@ -119 +119 @@
 {
         int color = *(uint32_t *)(src);
-        return ((color & 0xff) << 16) | (((color >> 8) & 0xff) << 8) | ((color
-                >> 16) & 0xff);
+        return ((color & 0xff) << 16) | (((color >> 8) & 0xff) << 8) |
+            ((color >> 16) & 0xff);
 }
 
@@ -151 +151 @@
 {
         /* 5-bit, 5-bits, 5-bits */ 
-        *((uint16_t *) dst) = RED(rgb, 5) << 10 | GREEN(rgb, 5) << 5 | BLUE(rgb,
-                5);
+        *((uint16_t *) dst) = RED(rgb, 5) << 10 | GREEN(rgb, 5) << 5 |
+            BLUE(rgb, 5);
 }
 
@@ -159 +159 @@
 {
         int color = *(uint16_t *)(src);
-        return (((color >> 10) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x1f) <<
-                (8 + 3)) | ((color & 0x1f) << 3);
+        return (((color >> 10) & 0x1f) << (16 + 3)) |
+            (((color >> 5) & 0x1f) << (8 + 3)) | ((color & 0x1f) << 3);
 }
 
@@ -167 +167 @@
 {
         /* 5-bit, 6-bits, 5-bits */ 
-        *((uint16_t *) dst) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 | BLUE(rgb,                5);
+        *((uint16_t *) dst) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 |
+            BLUE(rgb, 5);
 }
 
@@ -174 +175 @@
 {
         int color = *(uint16_t *)(src);
-        return (((color >> 11) & 0x1f) << (16 + 3)) | (((color >> 5) & 0x3f) <<
-                (8 + 2)) | ((color & 0x1f) << 3);
+        return (((color >> 11) & 0x1f) << (16 + 3)) |
+            (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
 }
 
@@ -188 +189 @@
 static void rgb_byte8(void *dst, int rgb)
 {
-        *((uint8_t *) dst) = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 | BLUE(rgb,
-                3);
+        *((uint8_t *) dst) = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 |
+            BLUE(rgb, 3);
 }
 
@@ -199 +200 @@
 {
         int color = *(uint8_t *)src;
-        return (((color >> 5) & 0x7) << (16 + 5)) | (((color >> 3) & 0x3) << (8
-                + 6)) | ((color & 0x7) << 5);
+        return (((color >> 5) & 0x7) << (16 + 5)) |
+            (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
 }
 
@@ -232 +233 @@
                 memcpy(&fbaddress[scanline * y], blankline, xres * pixelbytes);
                 if (dbbuffer)
-                        memcpy(&dbbuffer[scanline * y], blankline, xres *
-                                pixelbytes);
+                        memcpy(&dbbuffer[scanline * y], blankline,
+                            xres * pixelbytes);
         }
 }
@@ -244 +245 @@
                 count_t first;
                 
+                /* Clear the last row */
                 memcpy(&dbbuffer[dboffset * scanline], blankline, ROW_BYTES);
                 
                 dboffset = (dboffset + FONT_SCANLINES) % yres;
                 first = yres - dboffset;
-
-                memcpy(fbaddress, &dbbuffer[scanline * dboffset], first *
-                        scanline);
-                memcpy(&fbaddress[first * scanline], dbbuffer, dboffset *
-                        scanline);
+                
+                /* Move all rows one row up */
+                if (xres * pixelbytes == scanline) {
+                        memcpy(fbaddress, &dbbuffer[dboffset * scanline],
+                            first * scanline);
+                        memcpy(&fbaddress[first * scanline], dbbuffer,
+                            dboffset * scanline);
+                } else {
+                        /*
+                         * When the scanline is bigger than number of bytes
+                         * in the X-resolution, chances are that the
+                         * frame buffer memory past the X-resolution is special
+                         * in some way. For example, the SUNW,ffb framebuffer
+                         * wraps this area around the beginning of the same
+                         * line. To avoid troubles, copy only memory as
+                         * specified by the resolution.
+                         */
+                        int i;
+
+                        for (i = 0; i < first; i++)
+                                memcpy(&fbaddress[i * scanline],
+                                    &dbbuffer[(dboffset + i) * scanline],
+                                    xres * pixelbytes);
+                        for (i = 0; i < dboffset; i++)
+                                memcpy(&fbaddress[(first + i) * scanline],
+                                    &dbbuffer[i * scanline], xres * pixelbytes);
+                }
         } else {
                 uint8_t *lastline = &fbaddress[(rows - 1) * ROW_BYTES];
                 
-                memcpy((void *) fbaddress, (void *) &fbaddress[ROW_BYTES],
-                        scanline * yres - ROW_BYTES);
-                /* Clear last row */
-                memcpy((void *) lastline, (void *) blankline, ROW_BYTES);
+                if (xres * pixelbytes == scanline) {
+                        /* Move all rows one row up */
+                        memcpy((void *) fbaddress,
+                            (void *) &fbaddress[ROW_BYTES],
+                            scanline * yres - ROW_BYTES);
+                        /* Clear the last row */
+                        memcpy((void *) lastline, (void *) blankline,
+                            ROW_BYTES);
+                } else {
+                        /*
+                         * See the comment in the dbbuffer case.
+                         */
+                        int i;
+
+                        /* Move all rows one row up */
+                        for (i = 0; i < yres - FONT_SCANLINES; i++)
+                                memcpy(&fbaddress[i * scanline],
+                                    &fbaddress[(i + FONT_SCANLINES) * scanline],
+                                    xres * pixelbytes);
+                        /* Clear the last row */
+                        for (i = 0; i < FONT_SCANLINES; i++)
+                                memcpy(&lastline[i * scanline],
+                                    &blankline[i * scanline],
+                                    xres * pixelbytes);
+                }
         }
 }
@@ -291 +336 @@
 
         for (y = 0; y < FONT_SCANLINES; y++)
-                draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y], col *
-                        COL_WIDTH, row * FONT_SCANLINES + y);
+                draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y],
+                    col * COL_WIDTH, row * FONT_SCANLINES + y);
 }
 
@@ -303 +348 @@
         for (x = 0; x < COL_WIDTH; x++)
                 for (y = 0; y < FONT_SCANLINES; y++)
-                        invert_pixel(col * COL_WIDTH + x, row * FONT_SCANLINES +
-                                y);
+                        invert_pixel(col * COL_WIDTH + x,
+                            row * FONT_SCANLINES + y);
 }
 
@@ -328 +373 @@
                         if (byte & 1)
                                 putpixel(startx + x, starty + y,
-                                        COLOR(LOGOCOLOR));
+                                    COLOR(LOGOCOLOR));
                 }
 }
@@ -401 +446 @@
  */
 void fb_init(uintptr_t addr, unsigned int x, unsigned int y, unsigned int scan,
-        unsigned int visual)
+    unsigned int visual)
 {
         switch (visual) {
@@ -468 +513 @@
         sysinfo_set_item_val("fb.visual", NULL, visual);
         sysinfo_set_item_val("fb.address.physical", NULL, addr);
-        sysinfo_set_item_val("fb.address.color", NULL, PAGE_COLOR((uintptr_t)
-                fbaddress));
+        sysinfo_set_item_val("fb.address.color", NULL,
+            PAGE_COLOR((uintptr_t) fbaddress));
         sysinfo_set_item_val("fb.invert-colors", NULL, invert_colors);