vbe support, truecolor window manager pixbufs

doc/internal/mem.txt

@@ -6,8 +6,12 @@
   0x2 byte: PCI minor
   0x3 byte: PCI major
   0x4 byte: last PCI bus
-
+ ;0x5 byte
   0x6 word: BIOS memory map length
+  0x8 word: active VBE mode
+
+0x0000.4200 - 0x0000.43ff  (512): VBE2 info block
+0x0000.4400 - 0x0000.44ff  (256): active VBE mode info
 
 0x0000.4f98 - 0x0000.4fff  (104): TSS
 0x0000.5000 - 0x0000.5fff   (4k): kernel page directory

doc/ints.txt

@@ -24,6 +24,8 @@ the edx register of "start task" is a pointer to a null-terminated string.
   the new task receives its own handle in ecx.
 ipc operations return 0xffffffff if the specified task doesn't exist.
   "find unread ipc" system call returns 0 if there is no unread ipc.
+pixbufs are arrays of four-byte pixels, from left to right, then top to bottom.
+  pixels are a red byte, a green byte, a blue byte, and a padding byte.
 
 invalid system call numbers change eax to -1, and have no other effect.
 

src/boot.asm

@@ -8,6 +8,11 @@ support_flags equ 0x4000
 pci_hw_char   equ 0x4001
 pci_ver       equ 0x4002
 last_pci_bus  equ 0x4004
+bios_mmap_len equ 0x4006
+vbe_mode      equ 0x4008
+
+vbe_block     equ 0x4200
+vbe_mode_info equ 0x4400
 
 pci_support equ 0x80
 pae_support equ 0x40
@@ -18,10 +23,7 @@ pae_support equ 0x40
 
   xor ax, ax
   mov ss, ax
-  mov sp, 0x7ffc
+  mov sp, 0x8000
-
-  mov ax, 0x0013
-  int 0x10
 
   mov ax, kernel_segment
   mov es, ax
@@ -72,7 +74,95 @@ mmap_loop:
   test ebx, ebx
   jnz mmap_loop
 mmap_end:
-  mov word [0x4006], di
+  mov word [bios_mmap_len], di
+
+  xor ax, ax
+  mov es, ax
+  mov di, vbe_block
+  mov ah, 0x4f
+
+  mov dword [di], 0x32454256;'VBE2'
+
+  int 0x10
+
+  cmp dword [di], 0x41534556;'VESA'
+  jne no_vbe
+
+  mov bx, word [di + 0x0e]
+  mov ax, word [di + 0x10]
+  mov fs, ax
+  xor esi, esi
+  mov bp, 0xffff
+  mov di, 0x5000
+
+vbe_loop:
+  max_height equ 800
+  ;fs:bx is mode pointer
+  ;esi is highest resolution yet (width * height)
+  ;bp is that mode's number
+  ;uses 0x5000 - 0x50ff as mode info buffer
+  ;skips those without byte-aligned pixels
+
+  mov cx, word [fs:bx]
+  cmp cx, 0xffff
+  je got_highest_vbe
+
+  add bx, 4
+
+  mov ax, 0x4f01
+  int 0x10
+
+  mov al, byte [di]
+
+  test al, 0x01
+  jz vbe_loop
+
+  test al, 0x10
+  jz vbe_loop
+
+  test al, 0x80
+  jz vbe_loop
+
+  mov dx, word [di + 0x14];height
+  cmp dx, max_height
+  jg vbe_loop
+
+  mov ax, word [di + 0x12];width
+  mul dx
+
+  shl edx, 16
+  mov dx, ax
+
+  xor eax, eax
+
+  mov al, byte [di + 0x19];bpp
+  test al, 0x07
+  jnz vbe_loop
+
+  mul edx
+
+  cmp eax, esi
+  jle vbe_loop
+
+  mov esi, eax
+  mov bp, cx
+  jmp vbe_loop
+
+got_highest_vbe:
+  cmp bp, 0xffff
+  je no_vbe
+
+  mov cx, bp
+  mov ax, 0x4f01
+  mov di, vbe_mode_info
+  int 0x10
+
+  or ch, 0x40
+  mov word [vbe_mode], cx
+
+  mov ax, 0x4f02
+  mov bx, cx
+  int 0x10
 
   cli
 
@@ -84,6 +174,25 @@ mmap_end:
 
   jmp 0x10:pmode
 
+no_vbe:
+  xor ax, ax
+  mov es, ax
+
+  mov ax, 0x1300
+  mov bx, 0x004f
+  mov cx, no_vbe_str.len
+  xor dx, dx
+  mov bp, no_vbe_str
+  int 0x10
+
+real_halt:
+  hlt
+  jmp real_halt
+
+no_vbe_str:
+  db "NO VBE2!"
+.len equ $ - no_vbe_str
+
 bits 32
 
 pmode:

src/kernel/log.c

@@ -52,8 +52,16 @@ void logf(enum log_level level, const char *format, ...) {
         while (*s)
           logch(*(s++));
         break;
+      case 'n':;
+        uint32_t d = va_arg(args, uint32_t);
+        if (d >= 0x80000000) {
+          logch('-');
+          d = -d;
+        }
+        goto put_dec;
       case 'd':;
-        const uint32_t d = va_arg(args, uint32_t);
+        d = va_arg(args, uint32_t);
+      put_dec:
         if (d == 0) {
           logch('0');
           break;

src/kernel/main.c

@@ -15,6 +15,7 @@
 #include "kbd.h"
 #include "log.h"
 #include "pci.h"
+#include "vbe.h"
 
 void _start_user_mode() __attribute__ ((noreturn));
 
@@ -46,12 +47,16 @@ void main() {
   logf(LOG_INFO, "Available kernel memory: %dk", kernel_pages_left * 4);
   logf(LOG_INFO, "Available user memory: %dk", user_pages_left * 4);
 
+  logf(LOG_INFO, "");
+
   logf(LOG_INFO, "PCI devices:");
   for (uint16_t i = 0; i < n_pci_devices; ++i) {
     const struct pci_device *dev = nth_pci_device(i);
     logf(LOG_INFO, "  %hw:%hw (%hb:%hb)", dev->id_vendor, dev->id_device, dev->class, dev->subclass);
   }
 
+  logf(LOG_INFO, "");
+
   logf(LOG_INFO, "Drives:");
   for (uint8_t i = 0; i < n_drives; ++i) {
     const struct drive *d = &drives[i];
@@ -59,6 +64,29 @@ void main() {
     logf(LOG_INFO, "  %s: %d%sk, %s (%d%sk free)", d->drive_type, d->n_sectors / 2, d->n_sectors % 2 ? ".5" : "", d->fs_type, free / 2, free % 2 ? ".5" : "");
   }
 
+  logf(LOG_INFO, "");
+
+  logf(LOG_INFO, "VBE info:");
+  logf(LOG_INFO, "  Implemention: %s", RM_PTR(char, VBE_INFO->oem_name));
+  logf(LOG_INFO, "  Video memory: %dk", VBE_INFO->total_memory * 64);
+  logf(LOG_INFO, "  Standard:     %d.%d.%d", VBE_INFO->major_version, VBE_INFO->minor_version, VBE_INFO->version_rev);
+  logf(LOG_INFO, "  Vendor:  %s", RM_PTR(char, VBE_INFO->vendor_name));
+  logf(LOG_INFO, "  Product: %s", RM_PTR(char, VBE_INFO->product_name));
+  logf(LOG_INFO, "  Version: %s", RM_PTR(char, VBE_INFO->product_rev_name));
+
+  logf(LOG_INFO, "");
+
+  #define MASK(offset, length) ((~((1 << offset) - 1)) - (offset + length == 32 ? 0 : (~((1 << (offset + length)) - 1))))
+  logf(LOG_INFO, "Active video mode:");
+  logf(LOG_INFO, "  Resolution: %dx%dx%d", VBE_MODE_INFO->width, VBE_MODE_INFO->height, VBE_MODE_INFO->bpp);
+  logf(LOG_INFO, "  Red mask:   0x%h", MASK(VBE_MODE_INFO->red_off,   VBE_MODE_INFO->red_len));
+  logf(LOG_INFO, "  Green mask: 0x%h", MASK(VBE_MODE_INFO->green_off, VBE_MODE_INFO->green_len));
+  logf(LOG_INFO, "  Blue mask:  0x%h", MASK(VBE_MODE_INFO->blue_off,  VBE_MODE_INFO->blue_len));
+  logf(LOG_INFO, "  Alpha mask: 0x%h", MASK(VBE_MODE_INFO->alpha_off, VBE_MODE_INFO->alpha_len));
+  logf(LOG_INFO, "  Framebuffer address: 0x%h", VBE_MODE_INFO->frame_buf);
+
+  logf(LOG_INFO, "");
+
   logf(LOG_INFO, "Loading init program.");
 
   if (!try_elf_run(drives, "bin/init", "", 0))

src/kernel/vbe.h

@@ -0,0 +1,71 @@
+#ifndef VBE_H
+#define VBE_H
+
+#include <stdint.h>
+
+struct segoff {
+  uint16_t offset;
+  uint16_t segment;
+} __attribute__ ((__packed__));
+
+#define RM_PTR(type, segoff) ((type *)((segoff).segment * 16 + (segoff).offset))
+
+enum vbe_capabilities {
+  VBE_CAP_SWITCHABLE_DAC = 0x1,
+  VBE_CAP_NON_VGA        = 0x2,
+  VBE_CAP_WEIRD_RAMDAC   = 0x4
+};
+
+#define VBE_INFO                      \
+  ((struct {                          \
+      uint8_t signature[4];           \
+      uint8_t minor_version;          \
+      uint8_t major_version;          \
+      struct segoff oem_name;         \
+      uint32_t capabilities;          \
+      struct segoff mode_list;        \
+      /*in units of 64kiB*/           \
+      uint16_t total_memory;          \
+      uint16_t version_rev;           \
+      struct segoff vendor_name;      \
+      struct segoff product_name;     \
+      struct segoff product_rev_name; \
+    } __attribute__ ((__packed__)) *)0x4200)
+
+#define VBE_MODE_INFO             \
+  ((struct {                      \
+      uint16_t attribs;           \
+      uint8_t wina_attribs;       \
+      uint8_t winb_attribs;       \
+      uint16_t win_gran;          \
+      uint16_t win_size;          \
+      uint16_t wina_seg;          \
+      uint16_t winb_seg;          \
+      struct segoff win_func;     \
+      uint16_t pitch;/*in bytes*/ \
+      uint16_t width;             \
+      uint16_t height;            \
+      uint8_t char_width;         \
+      uint8_t char_height;        \
+      uint8_t n_planes;           \
+      uint8_t bpp;                \
+      uint8_t n_banks;            \
+      uint8_t mem_model;          \
+      uint8_t bank_size;/*in kiB*/\
+      uint8_t image_pages;        \
+      uint8_t reserved;           \
+      uint8_t red_len;            \
+      uint8_t red_off;            \
+      uint8_t green_len;          \
+      uint8_t green_off;          \
+      uint8_t blue_len;           \
+      uint8_t blue_off;           \
+      uint8_t alpha_len;          \
+      uint8_t alpha_off;          \
+      uint8_t color_attribs;      \
+      void *frame_buf;            \
+      void *off_screen;           \
+      uint16_t off_screen_length; \
+    } __attribute__ ((__packed__)) *)0x4400)
+
+#endif

src/kernel/window.c

@@ -7,18 +7,21 @@
 #include "pmap.h"
 #include "elf.h"
 #include "log.h"
+#include "vbe.h"
 
 #define MAX_WINDOWS 64
 #define ACTION_BUFFER_PAGES 1
 #define AB_END(buf) (buf + (ACTION_BUFFER_PAGES * 4096) / sizeof(struct window_action))
 
-#define BACKGROUND(x, y) ((x / 16 + y / 16) % 2 ? 0x14 : 0x07)
+#define GSC(x, y) (x / 4 + y / 4 >= 256 ? 255 : x / 4 + y / 4)
+#define BACKGROUND(x, y) ((struct pixel){.r = GSC(x / 2, y / 3), .g = GSC(x, y), .b = GSC(x, y / 2)})
 
-#define BORDER_LIGHT 0x1c
+#define BORDER_COLOR ((struct pixel){.r = 0x11, .g = 0x11, .b = 0x11})
-#define BORDER_DARK  0x08
+
+#define MOVE_BY 5
 
 static struct window {
-  const volatile void *pixel_buffer_pma;
+  const volatile struct pixel *pixel_buffer_pma;
   uint16_t width;
   uint16_t height;
 
@@ -38,65 +41,74 @@ static struct window {
 static struct window *bottom_window = 0;
 static struct window *top_window = 0;
 
-#define SCREEN_HEIGHT 200
+uint32_t pix_clear_mask;
-#define SCREEN_WIDTH  320
-#define VGA_MEMORY    ((uint8_t *)0xa0000)
 
-static inline void draw_hz_line(uint16_t y, uint16_t xs, uint16_t xm, uint8_t color) {
+static inline void put_pix(uint16_t y, uint16_t x, struct pixel px) {
-  if (y >= SCREEN_HEIGHT)
+  uint32_t *const fbp = VBE_MODE_INFO->frame_buf + y * VBE_MODE_INFO->pitch + x * VBE_MODE_INFO->bpp / 8;
-    return;
+//logf(LOG_INFO, "-- fbp = 0x%h", fbp);
-  if (xs >= SCREEN_WIDTH)
+//logf(LOG_INFO, "-- *fbp -> 0x%h", *fbp);
-    xs = 0;
+  *fbp &= pix_clear_mask;
-  if (xm > SCREEN_WIDTH)
+  *fbp |= (px.r >> (8 - VBE_MODE_INFO->red_len))   << VBE_MODE_INFO->red_off;
-    xm = SCREEN_WIDTH;
+  *fbp |= (px.g >> (8 - VBE_MODE_INFO->green_len)) << VBE_MODE_INFO->green_off;
-  uint8_t *const line_start = VGA_MEMORY + y * SCREEN_WIDTH;
+  *fbp |= (px.b >> (8 - VBE_MODE_INFO->blue_len))  << VBE_MODE_INFO->blue_off;
-  for (uint8_t *p = line_start + xs; p < line_start + xm; ++p)
+//logf(LOG_INFO, "-- *fbp <- 0x%h", *fbp);
-    *p = color;
 }
 
-static inline void draw_vt_line(uint16_t x, uint16_t ys, uint16_t ym, uint8_t color) {
+static inline void draw_hz_line(uint16_t y, uint16_t xs, uint16_t xm, struct pixel color) {
-  if (x >= SCREEN_WIDTH)
+  if (y >= VBE_MODE_INFO->height)
     return;
-  if (ys >= SCREEN_HEIGHT)
+  if (xs >= VBE_MODE_INFO->width)
+    xs = 0;
+  if (xm > VBE_MODE_INFO->width)
+    xm = VBE_MODE_INFO->width;
+  for (uint16_t x = xs; x < xm; ++x)
+    put_pix(y, x, color);
+}
+
+static inline void draw_vt_line(uint16_t x, uint16_t ys, uint16_t ym, struct pixel color) {
+  if (x >= VBE_MODE_INFO->width)
+    return;
+  if (ys >= VBE_MODE_INFO->height)
     ys = 0;
-  if (ym > SCREEN_HEIGHT)
+  if (ym > VBE_MODE_INFO->height)
-    ym = SCREEN_HEIGHT;
+    ym = VBE_MODE_INFO->height;
-  uint8_t *const line_start = VGA_MEMORY + x;
+  for (uint16_t y = ys; y < ym; ++y)
-  for (uint8_t *p = line_start + ys * SCREEN_WIDTH; p < line_start + ym * SCREEN_WIDTH; p += SCREEN_WIDTH)
+    put_pix(y, x, color);
-    *p = color;
 }
 
 static void paint_and_above(const struct window *w) {
   switch_to_kernel_cr3();
   for (const struct window *i = w; i; i = i->above) {
-    const uint16_t ys = i->ypos < SCREEN_HEIGHT ? 0 : -i->ypos;
+    const uint16_t ys = i->ypos < VBE_MODE_INFO->height ? 0 : -i->ypos;
-    const uint16_t xs = i->xpos < SCREEN_WIDTH  ? 0 : -i->xpos;
+    const uint16_t xs = i->xpos < VBE_MODE_INFO->width  ? 0 : -i->xpos;
-    const uint16_t ym = i->ypos + i->height <= SCREEN_HEIGHT ? i->height : SCREEN_HEIGHT - i->ypos;
+    const uint16_t ym = ((i->ypos + i->height) & 0xffff) <= VBE_MODE_INFO->height ? i->height : VBE_MODE_INFO->height - i->ypos;
-    const uint16_t xm = i->xpos + i->width  <= SCREEN_WIDTH  ? i->width  : SCREEN_WIDTH  - i->xpos;
+    const uint16_t xm = ((i->xpos + i->width)  & 0xffff) <= VBE_MODE_INFO->width  ? i->width  : VBE_MODE_INFO->width  - i->xpos;
+
+  //logf(LOG_INFO, "y: %n .. %n", ys, ym - 1);
+  //logf(LOG_INFO, "x: %n .. %n", xs, xm - 1);
 
     for (uint16_t y = ys; y < ym; ++y)
-      for (uint16_t x = xs; x < xm; ++x) {
+      for (uint16_t x = xs; x < xm; ++x)
-        const uint8_t pixel = ((uint8_t *)i->pixel_buffer_pma)[y * i->width + x];
+        put_pix(y + i->ypos, x + i->xpos, i->pixel_buffer_pma[y * i->width + x]);
-        if (pixel)
-          VGA_MEMORY[(y + i->ypos) * SCREEN_WIDTH + x + i->xpos] = pixel;
-      }
 
-    draw_hz_line(i->ypos - 2, i->xpos - 2, i->xpos + i->width  + 2, BORDER_LIGHT);
+    draw_hz_line(i->ypos             - 2, i->xpos - 2, i->xpos + i->width + 2, BORDER_COLOR);
-    draw_vt_line(i->xpos - 2, i->ypos - 1, i->ypos + i->height + 2, BORDER_LIGHT);
+    draw_hz_line(i->ypos             - 1, i->xpos - 2, i->xpos + i->width + 2, BORDER_COLOR);
-    draw_hz_line(i->ypos - 1, i->xpos - 1, i->xpos + i->width  + 2, BORDER_DARK);
+    draw_hz_line(i->ypos + i->height,     i->xpos - 2, i->xpos + i->width + 2, BORDER_COLOR);
-    draw_vt_line(i->xpos - 1, i->ypos,     i->ypos + i->height + 2, BORDER_DARK);
+    draw_hz_line(i->ypos + i->height + 1, i->xpos - 2, i->xpos + i->width + 2, BORDER_COLOR);
-    draw_hz_line(i->ypos + i->height, i->xpos, i->xpos + i->width + 1, BORDER_LIGHT);
+    draw_vt_line(i->xpos             - 2, i->ypos,     i->ypos + i->height,    BORDER_COLOR);
-    draw_vt_line(i->xpos + i->width,  i->ypos, i->ypos + i->height,    BORDER_LIGHT);
+    draw_vt_line(i->xpos             - 1, i->ypos,     i->ypos + i->height,    BORDER_COLOR);
-    draw_hz_line(i->ypos + i->height + 1, i->xpos, i->xpos + i->width  + 2, BORDER_DARK);
+    draw_vt_line(i->xpos + i->width,      i->ypos,     i->ypos + i->height,    BORDER_COLOR);
-    draw_vt_line(i->xpos + i->width  + 1, i->ypos, i->ypos + i->height + 1, BORDER_DARK);
+    draw_vt_line(i->xpos + i->width  + 1, i->ypos,     i->ypos + i->height,    BORDER_COLOR);
   }
   switch_to_task_cr3();
 }
 
 static void paint_bg() {
-  for (uint16_t y = 0; y < SCREEN_HEIGHT; ++y)
+  switch_to_kernel_cr3();
-    for (uint16_t x = 0; x < SCREEN_WIDTH; ++x)
+  for (uint16_t y = 0; y < VBE_MODE_INFO->height; ++y)
-      VGA_MEMORY[y * SCREEN_WIDTH + x] = BACKGROUND(x, y);
+    for (uint16_t x = 0; x < VBE_MODE_INFO->width; ++x)
+      put_pix(y, x, BACKGROUND(x, y));
+  switch_to_task_cr3();
 }
 
 static void paint_all() {
@@ -104,7 +116,7 @@ static void paint_all() {
   paint_and_above(bottom_window);
 }
 
-struct window *new_window(uint16_t width, uint16_t height, const void *pixel_buffer) {
+struct window *new_window(uint16_t width, uint16_t height, const struct pixel *pixel_buffer) {
   if (!pixel_buffer) {
     logf(LOG_WARN, "Refusing to create window with null pixel buffer for task %s.", active_task->name);
     return 0;
@@ -122,8 +134,8 @@ got_window:
   w->pixel_buffer_pma = vma_to_pma(active_task->page_directory, pixel_buffer);
   w->width = width;
   w->height = height;
-  w->xpos = 10;
+  w->xpos = (VBE_MODE_INFO->width  / 2) - (width  / 2);
-  w->ypos = 10;
+  w->ypos = (VBE_MODE_INFO->height / 2) - (height / 2);
 
   struct window_action *const ab = allocate_kernel_pages(ACTION_BUFFER_PAGES);
   w->action_buffer = ab;
@@ -174,7 +186,7 @@ void delete_any_windows_from(struct task_state *tstate) {
     paint_all();
 }
 
-void resize_window(struct window *w, uint16_t width, uint16_t height, const void *pixel_buffer) {
+void resize_window(struct window *w, uint16_t width, uint16_t height, const struct pixel *pixel_buffer) {
   const bool smaller = (width < w->width) || (height < w->height);
 
   w->width = width;
@@ -187,7 +199,7 @@ void resize_window(struct window *w, uint16_t width, uint16_t height, const void
     paint_and_above(w);
 }
 
-void reassign_pixel_buffer(struct window *w, const void *pixel_buffer) {
+void reassign_pixel_buffer(struct window *w, const struct pixel *pixel_buffer) {
   w->pixel_buffer_pma = vma_to_pma(active_task->page_directory, pixel_buffer);
 }
 
@@ -259,6 +271,14 @@ static char *run_command;
 static char *run_command_pass = "";
 
 void init_win() {
+  #define MASK(offset, length) ((~((1 << offset) - 1)) - (offset + length == 32 ? 0 : (~((1 << (offset + length)) - 1))))
+  pix_clear_mask = ~(
+    MASK(VBE_MODE_INFO->red_off,   VBE_MODE_INFO->red_len)   |
+    MASK(VBE_MODE_INFO->green_off, VBE_MODE_INFO->green_len) |
+    MASK(VBE_MODE_INFO->blue_off,  VBE_MODE_INFO->blue_len)  |
+    MASK(VBE_MODE_INFO->alpha_off, VBE_MODE_INFO->alpha_len)
+  );
+
   paint_bg();
 
   const file_id_t fid = drives->get_file(drives, RUN_COMMAND_FILE);
@@ -323,25 +343,25 @@ void on_action(struct window_action packet) {
           break;
         case WM_MOVE_LEFT:
           if (top_window) {
-            --top_window->xpos;
+            top_window->xpos -= MOVE_BY;
             paint_all();
           }
           break;
         case WM_MOVE_RIGHT:
           if (top_window) {
-            ++top_window->xpos;
+            top_window->xpos += MOVE_BY;
             paint_all();
           }
           break;
         case WM_MOVE_UP:
           if (top_window) {
-            --top_window->ypos;
+            top_window->ypos -= MOVE_BY;
             paint_all();
           }
           break;
         case WM_MOVE_DOWN:
           if (top_window) {
-            ++top_window->ypos;
+            top_window->ypos += MOVE_BY;
             paint_all();
           }
           break;

src/kernel/window.h

@@ -9,13 +9,20 @@
 
 struct window;
 
+struct pixel {
+  uint8_t r;
+  uint8_t g;
+  uint8_t b;
+  uint8_t pad;
+} __attribute__ ((__packed__));
+
 void init_win();
 
-struct window *new_window(uint16_t width, uint16_t height, const void *pixel_buffer);
+struct window *new_window(uint16_t width, uint16_t height, const struct pixel *pixel_buffer);
 void del_window(struct window *w);
 
-void resize_window(struct window *w, uint16_t width, uint16_t height, const void *pixel_buffer);
+void resize_window(struct window *w, uint16_t width, uint16_t height, const struct pixel *pixel_buffer);
-void reassign_pixel_buffer(struct window *w, const void *pixel_buffer);
+void reassign_pixel_buffer(struct window *w, const struct pixel *pixel_buffer);
 void push_window_paint(const struct window *w);
 struct window_action next_window_action(struct window *w);
 void wait_window_action();

src/user/highway/line.c

@@ -12,18 +12,33 @@
 #define LINE_SIZE 4096
 static char line[LINE_SIZE];
 
-static inline uint8_t hex_to_int(char ch) {
+static inline uint8_t hex_digit_to_int(char ch) {
   return ch - (ch <= '9' ? '0' : 'a' - 10);
 }
 
+static inline uint8_t hex_byte_to_int(const char *ch) {
+  return (hex_digit_to_int(ch[0]) << 4) | hex_digit_to_int(ch[1]);
+}
+
+static inline _pixel_t hex_to_pixel(const char *ch) {
+  return (_pixel_t){
+    .r = hex_byte_to_int(ch),
+    .g = hex_byte_to_int(ch + 2),
+    .b = hex_byte_to_int(ch + 4)
+  };
+}
+
 void ensure_color() {
-  const struct no_null_sn *color = get_var((struct no_null_sn){.data = "_color", .length = 6});
+  const struct no_null_sn *color;
-  //fgbg
+get_color:
-  if (color)
+  color = get_var((struct no_null_sn){.data = "_color", .length = 6});
-    term_set_color(
+  if (color && (color->length == 12))
-      (hex_to_int(color->data[0]) << 4) | hex_to_int(color->data[1]),
+    //rgb, fgbg
-      (hex_to_int(color->data[2]) << 4) | hex_to_int(color->data[3])
+    term_set_color(hex_to_pixel(color->data), hex_to_pixel(color->data + 6));
-    );
+  else {
+    new_color();
+    goto get_color;
+  }
 }
 
 static void line_replace(const char *from) {

src/user/highway/main.c

@@ -8,7 +8,6 @@
 #include "vars.h"
 
 void main(const char *arg) {
-  new_color();
   source(*arg ? arg : "user/default.rc");
   ensure_color();
 

src/user/highway/vars.c

@@ -84,7 +84,7 @@ void dump_vars() {
 }
 
 static const char hex_digits[] = "0123456789abcdef";
-static char color[] = {'1', '0', '.', '.'};
+static char color[12] = "000000......";
 
 static const struct no_null_sn color_name = {
   .data = "_color",
@@ -93,12 +93,46 @@ static const struct no_null_sn color_name = {
 
 static const struct no_null_sn color_value = {
   .data = color,
-  .length = 4
+  .length = 12
 };
 
 void new_color() {
-  const uint8_t bg = gen_rand() % 0x30 + 0x38;
+  const uint16_t hue = gen_rand() % (0x33 * 6);
-  color[2] = hex_digits[bg >> 4];
+  _pixel_t bg = {.r = 0xff, .g = 0xcc, .b = 0xcc};
-  color[3] = hex_digits[bg & 0xf];
+  if (hue <= 0x33) {
+    bg.b += hue;
+    goto got_bg;
+  }
+  bg.b += 0x33;
+  if (hue <= 0x33 * 2) {
+    bg.r -= hue - 0x33;
+    goto got_bg;
+  }
+  bg.r -= 0x33;
+  if (hue <= 0x33 * 3) {
+    bg.g += hue - 0x33 * 2;
+    goto got_bg;
+  }
+  bg.g += 0x33;
+  if (hue <= 0x33 * 4) {
+    bg.b -= hue - 0x33 * 3;
+    goto got_bg;
+  }
+  bg.b -= 0x33;
+  if (hue <= 0x33 * 5) {
+    bg.r += hue - 0x33 * 4;
+    goto got_bg;
+  }
+  bg.r += 0x33;
+  bg.g -= hue - 0x33 * 5;
+
+got_bg:
+  color[ 6] = hex_digits[bg.r / 16];
+  color[ 7] = hex_digits[bg.r % 16];
+  color[ 8] = hex_digits[bg.g / 16];
+  color[ 9] = hex_digits[bg.g % 16];
+  color[10] = hex_digits[bg.b / 16];
+  color[11] = hex_digits[bg.b % 16];
+
   set_var(color_name, color_value);
 }

src/user/include/libfont/fonts.h

@@ -1,6 +1,8 @@
 #ifndef LIBFONT_FONTS_H
 #define LIBFONT_FONTS_H
 
+#include <pland/syscall.h>
+
 #include <stdbool.h>
 #include <stdint.h>
 
@@ -16,6 +18,7 @@ struct font_info {
 
 struct font_info *get_font(const char *name);
 
-void put_char(const struct font_info *font, char ch, uint8_t *pb_ptr, uint32_t pb_pitch, uint8_t bg, uint8_t fg);
+//pitch is in pixels
+void put_char(const struct font_info *font, char ch, _pixel_t *pb_ptr, uint32_t pb_pitch, _pixel_t bg, _pixel_t fg);
 
 #endif

src/user/include/libterm/command.h

@@ -37,8 +37,8 @@ struct terminal_command {
       uint32_t x;
     } as_coords;
     struct {
-      uint8_t fg;
+      _pixel_t fg;
-      uint8_t bg;
+      _pixel_t bg;
     } as_color;
     char as_char;
     uint32_t as_uint;

src/user/include/libterm/terminal.h

@@ -12,7 +12,7 @@ void term_get_dimensions(uint32_t *width, uint32_t *height);
 void term_paint();
 void term_clear();
 
-void term_set_color(uint8_t fg, uint8_t bg);
+void term_set_color(_pixel_t fg, _pixel_t bg);
 void term_set_cursor(uint32_t new_y, uint32_t new_x);
 
 void term_cursor_left();

src/user/include/pland/syscall.h

@@ -18,6 +18,13 @@ typedef struct __attribute__ ((packed)) {
   uint8_t pad[23];
 } _dir_info_entry_t;
 
+typedef struct __attribute__ ((packed)) {
+  uint8_t r;
+  uint8_t g;
+  uint8_t b;
+  uint8_t pad;
+} _pixel_t;
+
 enum _scn {
   _SCN_OPEN_FILE,
   _SCN_CLOSE_FILE,
@@ -177,7 +184,7 @@ static inline uint32_t _count_of_dir(uint8_t drive_number, const char *path) {
   return _sc2(_SCN_COUNT_OF_DIR, drive_number, (uint32_t)path);
 }
 
-static inline _window_handle_t _new_window(uint16_t width, uint16_t height, void *pixel_buffer) {
+static inline _window_handle_t _new_window(uint16_t width, uint16_t height, _pixel_t *pixel_buffer) {
   return (_window_handle_t)_sc3(_SCN_NEW_WINDOW, width, height, (uint32_t)pixel_buffer);
 }
 
@@ -185,11 +192,11 @@ static inline void _delete_window(_window_handle_t window) {
   _sc1(_SCN_DELETE_WINDOW, (uint32_t)window);
 }
 
-static inline void _resize_window(_window_handle_t window, uint16_t width, uint16_t height, const void *pixel_buffer) {
+static inline void _resize_window(_window_handle_t window, uint16_t width, uint16_t height, const _pixel_t *pixel_buffer) {
   _sc4(_SCN_RESIZE_WINDOW, (uint32_t)window, width, height, (uint32_t)pixel_buffer);
 }
 
-static inline void _reassign_pixbuf(_window_handle_t window, const void *pixel_buffer) {
+static inline void _reassign_pixbuf(_window_handle_t window, const _pixel_t *pixel_buffer) {
   _sc2(_SCN_REASSIGN_PIXBUF, (uint32_t)window, (uint32_t)pixel_buffer);
 }
 

src/user/include/popups/info.h

@@ -7,8 +7,8 @@
 
 #include <stdarg.h>
 
-void info_popup(struct popup *into, const char *text, uint8_t fg, uint8_t bg);
+void info_popup(struct popup *into, const char *text, _pixel_t fg, _pixel_t bg);
-void info_popupf(struct popup *into, const char *text, uint8_t fg, uint8_t bg, ...);
+void info_popupf(struct popup *into, const char *text, _pixel_t fg, _pixel_t bg, ...);
-void info_popupf_v(struct popup *into, const char *text, uint8_t fg, uint8_t bg, va_list args);
+void info_popupf_v(struct popup *into, const char *text, _pixel_t fg, _pixel_t bg, va_list args);
 
 #endif

src/user/include/popups/popup.h

@@ -5,7 +5,7 @@
 
 struct popup {
   _window_handle_t handle;
-  uint8_t *pixbuf;
+  _pixel_t *pixbuf;
 
   bool has_quit;
   struct key_packet quit_as;

src/user/libfont/fonts.c

@@ -56,7 +56,8 @@ struct font_info *get_font(const char *name) {
   return 0;
 }
 
-void put_char(const struct font_info *font, char ch, uint8_t *pb_ptr, uint32_t pb_pitch, uint8_t bg, uint8_t fg) {
+//pitch is in pixels
+void put_char(const struct font_info *font, char ch, _pixel_t *pb_ptr, uint32_t pb_pitch, _pixel_t bg, _pixel_t fg) {
 //char *const msg = format("put_char(font = 0x%x, ch = '%c', pb_ptr = 0x%x, pb_pitch = %u, bg = 0x%2x, fg = 0x%2x);", font, ch, pb_ptr, pb_pitch, bg, fg);
 //_system_log(msg);
 //free_block(msg);

src/user/libterm/terminal.c

@@ -48,7 +48,7 @@ void term_clear() {
   try_send_command(&cmd);
 }
 
-void term_set_color(uint8_t fg, uint8_t bg) {
+void term_set_color(_pixel_t fg, _pixel_t bg) {
   struct terminal_command cmd = {
     .kind = SET_COLOR,
     .as_color = {

src/user/meminfo/meminfo.c

@@ -15,7 +15,8 @@ redo:
     "kernel memory free: %uk\n"
     "userspace memory free: %uk / %uk\n"
     "Escape to quit, F5 to refresh.",
-    0x10, 0x07,
+    (_pixel_t){.r = 0,    .g = 0,    .b = 0},
+    (_pixel_t){.r = 0xbf, .g = 0xbf, .b = 0xbf},
     _kernel_dynamic_area_left() * 4,
     _total_userspace_left() * 4,
     _total_userspace_size() * 4

src/user/mkpopup/main.c

@@ -31,6 +31,6 @@ void main(const char *text) {
   }
 
   struct popup p;
-  info_popup(&p, text, 0x10, 0x07);
+  info_popup(&p, text, (_pixel_t){.r = 0, .g = 0, .b = 0}, (_pixel_t){.r = 0xbf, .g = 0xbf, .b = 0xbf});
   make_modal(&p);
 }

src/user/popups/info.c

@@ -18,7 +18,7 @@ static const struct key_packet info_quits[] = {
   { .key_id = 0 }
 };
 
-void info_popup(struct popup *into, const char *msg, uint8_t fg, uint8_t bg) {
+void info_popup(struct popup *into, const char *msg, _pixel_t fg, _pixel_t bg) {
   if (!info_font)
     info_font = get_font(FONT);
 
@@ -41,7 +41,7 @@ void info_popup(struct popup *into, const char *msg, uint8_t fg, uint8_t bg) {
   const uint32_t pitch  = info_font->space_width  * w + 2 * PADDING;
   const uint32_t height = info_font->space_height * h + 2 * PADDING;
 
-  uint8_t *const pixbuf = get_block(pitch * height);
+  _pixel_t *const pixbuf = get_block(pitch * height * 4);
 
   for (uint32_t y = 0; y < height; ++y)
     for (uint32_t x = 0; x < pitch; ++x)
@@ -63,13 +63,13 @@ void info_popup(struct popup *into, const char *msg, uint8_t fg, uint8_t bg) {
   into->handle = _new_window(pitch, height, pixbuf);
 }
 
-void info_popupf_v(struct popup *into, const char *text, uint8_t fg, uint8_t bg, va_list args) {
+void info_popupf_v(struct popup *into, const char *text, _pixel_t fg, _pixel_t bg, va_list args) {
   char *const msg = format_v(text, args);
   info_popup(into, msg, fg, bg);
   free_block(msg);
 }
 
-void info_popupf(struct popup *into, const char *text, uint8_t fg, uint8_t bg, ...) {
+void info_popupf(struct popup *into, const char *text, _pixel_t fg, _pixel_t bg, ...) {
   va_list args;
   va_start(args, bg);
   info_popupf_v(into, text, fg, bg, args);

src/user/terminal/main.c

@@ -11,22 +11,23 @@
 #include <pland/pcrt.h>
 
 #define FONT_HARDCODE "fixed-10"
+#define PADDING 2
 
 _window_handle_t window;
-uint8_t *pixbuf;
+_pixel_t *pixbuf;
 char *termbuf;
 struct font_info *font;
 
 uint32_t width;
 uint32_t height;
-uint32_t cols = 50;
+uint32_t cols = 100;
-uint32_t rows = 15;
+uint32_t rows = 30;
 
 uint32_t cursor_y = 0;
 uint32_t cursor_x = 0;
 
-uint8_t bg_color = 0x10;
+_pixel_t bg_color = (_pixel_t){.r = 0,    .g = 0,    .b = 0};
-uint8_t fg_color = 0x07;
+_pixel_t fg_color = (_pixel_t){.r = 0xff, .g = 0xff, .b = 0xff};
 
 struct waiting_for_key_record {
   _task_handle_t task;
@@ -35,7 +36,7 @@ struct waiting_for_key_record {
 
 static void draw_char(uint32_t y, uint32_t x, bool inverted) {
 //syslogf("drawing 0x%2h%s at %u, %u", termbuf[y * cols + x], inverted ? " inverted" : "", y, x);
-  put_char(font, termbuf[y * cols + x], pixbuf + y * font->space_height * width + x * font->space_width, width, inverted ? fg_color : bg_color, inverted ? bg_color : fg_color);
+  put_char(font, termbuf[y * cols + x], pixbuf + (y * font->space_height + PADDING) * width + (x * font->space_width + PADDING), width, inverted ? fg_color : bg_color, inverted ? bg_color : fg_color);
 }
 
 static void clear() {
@@ -52,9 +53,9 @@ static void scroll_fw() {
   for (; i < cols * rows; ++i)
     termbuf[i] = ' ';
   const uint32_t row_height = font->space_height;
-  for (i = 0; i < width * (height - row_height); ++i)
+  for (i = width * PADDING; i < width * (height - PADDING - row_height); ++i)
     pixbuf[i] = pixbuf[i + width * row_height];
-  for (; i < width * height; ++i)
+  for (; i < width * (height - PADDING); ++i)
     pixbuf[i] = bg_color;
 }
 
@@ -187,9 +188,9 @@ static void set_dimensions(uint32_t new_rows, uint32_t new_cols) {
   cols = new_cols;
   termbuf = get_block(rows * cols);
 
-  width  = cols * font->space_width;
+  width  = cols * font->space_width  + PADDING * 2;
-  height = cols * font->space_height;
+  height = cols * font->space_height + PADDING * 2;
-  pixbuf = get_block(width * height);
+  pixbuf = get_block(width * height * 4);
 
   cursor_y = 0;
   cursor_x = 0;
@@ -199,27 +200,34 @@ static void set_dimensions(uint32_t new_rows, uint32_t new_cols) {
 }
 
 void draw_all() {
+  for (uint32_t y = 0; y < PADDING; ++y)
+    for (uint32_t x = 0; x < width; ++x)
+      pixbuf[y * width + x] = bg_color;
+  for (uint32_t y = height - PADDING; y < height; ++y)
+    for (uint32_t x = 0; x < width; ++x)
+      pixbuf[y * width + x] = bg_color;
+  for (uint32_t x = 0; x < PADDING; ++x)
+    for (uint32_t y = PADDING; y < height - PADDING; ++y)
+      pixbuf[y * width + x] = bg_color;
+  for (uint32_t x = width - PADDING; x < width; ++x)
+    for (uint32_t y = PADDING; y < height - PADDING; ++y)
+      pixbuf[y * width + x] = bg_color;
+
   for (uint32_t y = 0; y < rows; ++y)
     for (uint32_t x = 0; x < cols; ++x)
       draw_char(y, x, false);
   draw_char(cursor_y, cursor_x, true);
 }
 
-//#include <knob/format.h>
-
 void main(const char *cmd) {
-//syslogf("   this task: 0x%2h", this_task);
-//syslogf("  stdio task: 0x%2h", stdio_task);
-//syslogf("calling task: 0x%2h", calling_task);
-
   font = get_font(FONT_HARDCODE);
   if (!font)
     return;
 
   termbuf = get_block(cols * rows);
-  width = cols * font->space_width;
+  width  = cols * font->space_width  + PADDING * 2;
-  height = rows * font->space_height;
+  height = rows * font->space_height + PADDING * 2;
-  pixbuf = get_block(width * height);
+  pixbuf = get_block(width * height * 4);
   clear();
   add_sz_ww("Portland Terminal\n");
   window = _new_window(width, height, pixbuf);