diff options
Diffstat (limited to 'vnc.c')
| -rw-r--r-- | vnc.c | 198 |
1 files changed, 161 insertions, 37 deletions
@@ -42,6 +42,14 @@ typedef struct VncState VncState; typedef int VncReadEvent(VncState *vs, char *data, size_t len); +typedef void VncWritePixels(VncState *vs, void *data, int size); + +typedef void VncSendHextileTile(VncState *vs, + int x, int y, int w, int h, + uint32_t *last_bg, + uint32_t *last_fg, + int *has_bg, int *has_fg); + struct VncState { QEMUTimer *timer; @@ -53,12 +61,19 @@ struct VncState int height; uint64_t dirty_row[768]; char *old_data; - int depth; + int depth; /* internal VNC frame buffer byte per pixel */ int has_resize; int has_hextile; Buffer output; Buffer input; kbd_layout_t *kbd_layout; + /* current output mode information */ + VncWritePixels *write_pixels; + VncSendHextileTile *send_hextile_tile; + int pix_bpp, pix_big_endian; + int red_shift, red_max, red_shift1; + int green_shift, green_max, green_shift1; + int blue_shift, blue_max, blue_shift1; VncReadEvent *read_handler; size_t read_handler_expect; @@ -130,6 +145,66 @@ static void vnc_dpy_resize(DisplayState *ds, int w, int h) } } +/* fastest code */ +static void vnc_write_pixels_copy(VncState *vs, void *pixels, int size) +{ + vnc_write(vs, pixels, size); +} + +/* slowest but generic code. */ +static void vnc_convert_pixel(VncState *vs, uint8_t *buf, uint32_t v) +{ + unsigned int r, g, b; + + r = (v >> vs->red_shift1) & vs->red_max; + g = (v >> vs->green_shift1) & vs->green_max; + b = (v >> vs->blue_shift1) & vs->blue_max; + v = (r << vs->red_shift) | + (g << vs->green_shift) | + (b << vs->blue_shift); + switch(vs->pix_bpp) { + case 1: + buf[0] = v; + break; + case 2: + if (vs->pix_big_endian) { + buf[0] = v >> 8; + buf[1] = v; + } else { + buf[1] = v >> 8; + buf[0] = v; + } + break; + default: + case 4: + if (vs->pix_big_endian) { + buf[0] = v >> 24; + buf[1] = v >> 16; + buf[2] = v >> 8; + buf[3] = v; + } else { + buf[3] = v >> 24; + buf[2] = v >> 16; + buf[1] = v >> 8; + buf[0] = v; + } + break; + } +} + +static void vnc_write_pixels_generic(VncState *vs, void *pixels1, int size) +{ + uint32_t *pixels = pixels1; + uint8_t buf[4]; + int n, i; + + n = size >> 2; + for(i = 0; i < n; i++) { + vnc_convert_pixel(vs, buf, pixels[i]); + vnc_write(vs, buf, vs->pix_bpp); + } +} + static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h) { int i; @@ -139,7 +214,7 @@ static void send_framebuffer_update_raw(VncState *vs, int x, int y, int w, int h row = vs->ds->data + y * vs->ds->linesize + x * vs->depth; for (i = 0; i < h; i++) { - vnc_write(vs, row, w * vs->depth); + vs->write_pixels(vs, row, w * vs->depth); row += vs->ds->linesize; } } @@ -162,35 +237,26 @@ static void hextile_enc_cord(uint8_t *ptr, int x, int y, int w, int h) #include "vnchextile.h" #undef BPP +#define GENERIC +#define BPP 32 +#include "vnchextile.h" +#undef BPP +#undef GENERIC + static void send_framebuffer_update_hextile(VncState *vs, int x, int y, int w, int h) { int i, j; int has_fg, has_bg; uint32_t last_fg32, last_bg32; - uint16_t last_fg16, last_bg16; - uint8_t last_fg8, last_bg8; vnc_framebuffer_update(vs, x, y, w, h, 5); has_fg = has_bg = 0; for (j = y; j < (y + h); j += 16) { for (i = x; i < (x + w); i += 16) { - switch (vs->depth) { - case 1: - send_hextile_tile_8(vs, i, j, MIN(16, x + w - i), MIN(16, y + h - j), - &last_bg8, &last_fg8, &has_bg, &has_fg); - break; - case 2: - send_hextile_tile_16(vs, i, j, MIN(16, x + w - i), MIN(16, y + h - j), - &last_bg16, &last_fg16, &has_bg, &has_fg); - break; - case 4: - send_hextile_tile_32(vs, i, j, MIN(16, x + w - i), MIN(16, y + h - j), - &last_bg32, &last_fg32, &has_bg, &has_fg); - break; - default: - break; - } + vs->send_hextile_tile(vs, i, j, + MIN(16, x + w - i), MIN(16, y + h - j), + &last_bg32, &last_fg32, &has_bg, &has_fg); } } } @@ -660,30 +726,79 @@ static void set_encodings(VncState *vs, int32_t *encodings, size_t n_encodings) } } +static int compute_nbits(unsigned int val) +{ + int n; + n = 0; + while (val != 0) { + n++; + val >>= 1; + } + return n; +} + static void set_pixel_format(VncState *vs, int bits_per_pixel, int depth, int big_endian_flag, int true_color_flag, int red_max, int green_max, int blue_max, int red_shift, int green_shift, int blue_shift) { - switch (bits_per_pixel) { - case 32: - case 24: - vs->depth = 4; - break; - case 16: - vs->depth = 2; - break; - case 8: - vs->depth = 1; - break; - default: + int host_big_endian_flag; + +#ifdef WORDS_BIGENDIAN + host_big_endian_flag = 1; +#else + host_big_endian_flag = 0; +#endif + if (!true_color_flag) { + fail: vnc_client_error(vs); - break; + return; + } + if (bits_per_pixel == 32 && + host_big_endian_flag == big_endian_flag && + red_max == 0xff && green_max == 0xff && blue_max == 0xff && + red_shift == 16 && green_shift == 8 && blue_shift == 0) { + vs->depth = 4; + vs->write_pixels = vnc_write_pixels_copy; + vs->send_hextile_tile = send_hextile_tile_32; + } else + if (bits_per_pixel == 16 && + host_big_endian_flag == big_endian_flag && + red_max == 31 && green_max == 63 && blue_max == 31 && + red_shift == 11 && green_shift == 5 && blue_shift == 0) { + vs->depth = 2; + vs->write_pixels = vnc_write_pixels_copy; + vs->send_hextile_tile = send_hextile_tile_16; + } else + if (bits_per_pixel == 8 && + red_max == 7 && green_max == 7 && blue_max == 3 && + red_shift == 5 && green_shift == 2 && blue_shift == 0) { + vs->depth = 1; + vs->write_pixels = vnc_write_pixels_copy; + vs->send_hextile_tile = send_hextile_tile_8; + } else + { + /* generic and slower case */ + if (bits_per_pixel != 8 && + bits_per_pixel != 16 && + bits_per_pixel != 32) + goto fail; + vs->depth = 4; + vs->red_shift = red_shift; + vs->red_max = red_max; + vs->red_shift1 = 24 - compute_nbits(red_max); + vs->green_shift = green_shift; + vs->green_max = green_max; + vs->green_shift1 = 16 - compute_nbits(green_max); + vs->blue_shift = blue_shift; + vs->blue_max = blue_max; + vs->blue_shift1 = 8 - compute_nbits(blue_max); + vs->pix_bpp = bits_per_pixel / 8; + vs->pix_big_endian = big_endian_flag; + vs->write_pixels = vnc_write_pixels_generic; + vs->send_hextile_tile = send_hextile_tile_generic; } - - if (!true_color_flag) - vnc_client_error(vs); vnc_dpy_resize(vs->ds, vs->ds->width, vs->ds->height); memset(vs->dirty_row, 0xFF, sizeof(vs->dirty_row)); @@ -774,7 +889,11 @@ static int protocol_client_init(VncState *vs, char *data, size_t len) vnc_write_u8(vs, vs->depth * 8); /* bits-per-pixel */ vnc_write_u8(vs, vs->depth * 8); /* depth */ +#ifdef WORDS_BIGENDIAN + vnc_write_u8(vs, 1); /* big-endian-flag */ +#else vnc_write_u8(vs, 0); /* big-endian-flag */ +#endif vnc_write_u8(vs, 1); /* true-color-flag */ if (vs->depth == 4) { vnc_write_u16(vs, 0xFF); /* red-max */ @@ -783,6 +902,7 @@ static int protocol_client_init(VncState *vs, char *data, size_t len) vnc_write_u8(vs, 16); /* red-shift */ vnc_write_u8(vs, 8); /* green-shift */ vnc_write_u8(vs, 0); /* blue-shift */ + vs->send_hextile_tile = send_hextile_tile_32; } else if (vs->depth == 2) { vnc_write_u16(vs, 31); /* red-max */ vnc_write_u16(vs, 63); /* green-max */ @@ -790,14 +910,18 @@ static int protocol_client_init(VncState *vs, char *data, size_t len) vnc_write_u8(vs, 11); /* red-shift */ vnc_write_u8(vs, 5); /* green-shift */ vnc_write_u8(vs, 0); /* blue-shift */ + vs->send_hextile_tile = send_hextile_tile_16; } else if (vs->depth == 1) { - vnc_write_u16(vs, 3); /* red-max */ + /* XXX: change QEMU pixel 8 bit pixel format to match the VNC one ? */ + vnc_write_u16(vs, 7); /* red-max */ vnc_write_u16(vs, 7); /* green-max */ vnc_write_u16(vs, 3); /* blue-max */ vnc_write_u8(vs, 5); /* red-shift */ vnc_write_u8(vs, 2); /* green-shift */ vnc_write_u8(vs, 0); /* blue-shift */ + vs->send_hextile_tile = send_hextile_tile_8; } + vs->write_pixels = vnc_write_pixels_copy; vnc_write(vs, pad, 3); /* padding */ |