hw/display/qxl-render.c

   1 /*
   2  * qxl local rendering (aka display on sdl/vnc)
   3  *
   4  * Copyright (C) 2010 Red Hat, Inc.
   5  *
   6  * maintained by Gerd Hoffmann <kraxel@redhat.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 or
  11  * (at your option) version 3 of the License.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "qemu/osdep.h"
  23 #include "qxl.h"
  24 #include "sysemu/runstate.h"
  25 #include "trace.h"
  26
  27 static void qxl_blit(PCIQXLDevice *qxl, QXLRect *rect)
  28 {
  29     DisplaySurface *surface = qemu_console_surface(qxl->vga.con);
  30     uint8_t *dst = surface_data(surface);
  31     uint8_t *src;
  32     int len, i;
  33
  34     if (is_buffer_shared(surface)) {
  35         return;
  36     }
  37     trace_qxl_render_blit(qxl->guest_primary.qxl_stride,
  38             rect->left, rect->right, rect->top, rect->bottom);
  39     src = qxl->guest_primary.data;
  40     if (qxl->guest_primary.qxl_stride < 0) {
  41         /* qxl surface is upside down, walk src scanlines
  42          * in reverse order to flip it */
  43         src += (qxl->guest_primary.surface.height - rect->top - 1) *
  44             qxl->guest_primary.abs_stride;
  45     } else {
  46         src += rect->top * qxl->guest_primary.abs_stride;
  47     }
  48     dst += rect->top  * qxl->guest_primary.abs_stride;
  49     src += rect->left * qxl->guest_primary.bytes_pp;
  50     dst += rect->left * qxl->guest_primary.bytes_pp;
  51     len  = (rect->right - rect->left) * qxl->guest_primary.bytes_pp;
  52
  53     for (i = rect->top; i < rect->bottom; i++) {
  54         memcpy(dst, src, len);
  55         dst += qxl->guest_primary.abs_stride;
  56         src += qxl->guest_primary.qxl_stride;
  57     }
  58 }
  59
  60 void qxl_render_resize(PCIQXLDevice *qxl)
  61 {
  62     QXLSurfaceCreate *sc = &qxl->guest_primary.surface;
  63
  64     qxl->guest_primary.qxl_stride = sc->stride;
  65     qxl->guest_primary.abs_stride = abs(sc->stride);
  66     qxl->guest_primary.resized++;
  67     switch (sc->format) {
  68     case SPICE_SURFACE_FMT_16_555:
  69         qxl->guest_primary.bytes_pp = 2;
  70         qxl->guest_primary.bits_pp = 15;
  71         break;
  72     case SPICE_SURFACE_FMT_16_565:
  73         qxl->guest_primary.bytes_pp = 2;
  74         qxl->guest_primary.bits_pp = 16;
  75         break;
  76     case SPICE_SURFACE_FMT_32_xRGB:
  77     case SPICE_SURFACE_FMT_32_ARGB:
  78         qxl->guest_primary.bytes_pp = 4;
  79         qxl->guest_primary.bits_pp = 32;
  80         break;
  81     default:
  82         fprintf(stderr, "%s: unhandled format: %x\n", __func__,
  83                 qxl->guest_primary.surface.format);
  84         qxl->guest_primary.bytes_pp = 4;
  85         qxl->guest_primary.bits_pp = 32;
  86         break;
  87     }
  88 }
  89
  90 static void qxl_set_rect_to_surface(PCIQXLDevice *qxl, QXLRect *area)
  91 {
  92     area->left   = 0;
  93     area->right  = qxl->guest_primary.surface.width;
  94     area->top    = 0;
  95     area->bottom = qxl->guest_primary.surface.height;
  96 }
  97
  98 static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
  99 {
 100     VGACommonState *vga = &qxl->vga;
 101     DisplaySurface *surface;
 102     int width = qxl->guest_head0_width ?: qxl->guest_primary.surface.width;
 103     int height = qxl->guest_head0_height ?: qxl->guest_primary.surface.height;
 104     int i;
 105
 106     if (qxl->guest_primary.resized) {
 107         qxl->guest_primary.resized = 0;
 108         qxl->guest_primary.data = qxl_phys2virt(qxl,
 109                                                 qxl->guest_primary.surface.mem,
 110                                                 MEMSLOT_GROUP_GUEST,
 111                                                 qxl->guest_primary.abs_stride
 112                                                 * height);
 113         if (!qxl->guest_primary.data) {
 114             goto end;
 115         }
 116         qxl_set_rect_to_surface(qxl, &qxl->dirty[0]);
 117         qxl->num_dirty_rects = 1;
 118         trace_qxl_render_guest_primary_resized(
 119                width,
 120                height,
 121                qxl->guest_primary.qxl_stride,
 122                qxl->guest_primary.bytes_pp,
 123                qxl->guest_primary.bits_pp);
 124         if (qxl->guest_primary.qxl_stride > 0) {
 125             pixman_format_code_t format =
 126                 qemu_default_pixman_format(qxl->guest_primary.bits_pp, true);
 127             surface = qemu_create_displaysurface_from
 128                 (width,
 129                  height,
 130                  format,
 131                  qxl->guest_primary.abs_stride,
 132                  qxl->guest_primary.data);
 133         } else {
 134             surface = qemu_create_displaysurface
 135                 (width,
 136                  height);
 137         }
 138         dpy_gfx_replace_surface(vga->con, surface);
 139     }
 140
 141     if (!qxl->guest_primary.data) {
 142         goto end;
 143     }
 144     for (i = 0; i < qxl->num_dirty_rects; i++) {
 145         if (qemu_spice_rect_is_empty(qxl->dirty+i)) {
 146             break;
 147         }
 148         if (qxl->dirty[i].left < 0 ||
 149             qxl->dirty[i].top < 0 ||
 150             qxl->dirty[i].left > qxl->dirty[i].right ||
 151             qxl->dirty[i].top > qxl->dirty[i].bottom ||
 152             qxl->dirty[i].right > width ||
 153             qxl->dirty[i].bottom > height) {
 154             continue;
 155         }
 156         qxl_blit(qxl, qxl->dirty+i);
 157         dpy_gfx_update(vga->con,
 158                        qxl->dirty[i].left, qxl->dirty[i].top,
 159                        qxl->dirty[i].right - qxl->dirty[i].left,
 160                        qxl->dirty[i].bottom - qxl->dirty[i].top);
 161     }
 162     qxl->num_dirty_rects = 0;
 163
 164 end:
 165     if (qxl->render_update_cookie_num == 0) {
 166         graphic_hw_update_done(qxl->ssd.dcl.con);
 167     }
 168 }
 169
 170 /*
 171  * use ssd.lock to protect render_update_cookie_num.
 172  * qxl_render_update is called by io thread or vcpu thread, and the completion
 173  * callbacks are called by spice_server thread, deferring to bh called from the
 174  * io thread.
 175  */
 176 void qxl_render_update(PCIQXLDevice *qxl)
 177 {
 178     QXLCookie *cookie;
 179
 180     qemu_mutex_lock(&qxl->ssd.lock);
 181
 182     if (!runstate_is_running() || !qxl->guest_primary.commands ||
 183         qxl->mode == QXL_MODE_UNDEFINED) {
 184         qxl_render_update_area_unlocked(qxl);
 185         qemu_mutex_unlock(&qxl->ssd.lock);
 186         graphic_hw_update_done(qxl->ssd.dcl.con);
 187         return;
 188     }
 189
 190     qxl->guest_primary.commands = 0;
 191     qxl->render_update_cookie_num++;
 192     qemu_mutex_unlock(&qxl->ssd.lock);
 193     cookie = qxl_cookie_new(QXL_COOKIE_TYPE_RENDER_UPDATE_AREA,
 194                             0);
 195     qxl_set_rect_to_surface(qxl, &cookie->u.render.area);
 196     qxl_spice_update_area(qxl, 0, &cookie->u.render.area, NULL,
 197                           0, 1 /* clear_dirty_region */, QXL_ASYNC, cookie);
 198 }
 199
 200 void qxl_render_update_area_bh(void *opaque)
 201 {
 202     PCIQXLDevice *qxl = opaque;
 203
 204     qemu_mutex_lock(&qxl->ssd.lock);
 205     qxl_render_update_area_unlocked(qxl);
 206     qemu_mutex_unlock(&qxl->ssd.lock);
 207 }
 208
 209 void qxl_render_update_area_done(PCIQXLDevice *qxl, QXLCookie *cookie)
 210 {
 211     qemu_mutex_lock(&qxl->ssd.lock);
 212     trace_qxl_render_update_area_done(cookie);
 213     qemu_bh_schedule(qxl->update_area_bh);
 214     qxl->render_update_cookie_num--;
 215     qemu_mutex_unlock(&qxl->ssd.lock);
 216     g_free(cookie);
 217 }
 218
 219 static void qxl_unpack_chunks(void *dest, size_t size, PCIQXLDevice *qxl,
 220                               QXLDataChunk *chunk, uint32_t group_id)
 221 {
 222     uint32_t max_chunks = 32;
 223     size_t offset = 0;
 224     size_t bytes;
 225
 226     for (;;) {
 227         bytes = MIN(size - offset, chunk->data_size);
 228         memcpy(dest + offset, chunk->data, bytes);
 229         offset += bytes;
 230         if (offset == size) {
 231             return;
 232         }
 233         chunk = qxl_phys2virt(qxl, chunk->next_chunk, group_id,
 234                               sizeof(QXLDataChunk) + chunk->data_size);
 235         if (!chunk) {
 236             return;
 237         }
 238         max_chunks--;
 239         if (max_chunks == 0) {
 240             return;
 241         }
 242     }
 243 }
 244
 245 static QEMUCursor *qxl_cursor(PCIQXLDevice *qxl, QXLCursor *cursor,
 246                               uint32_t group_id)
 247 {
 248     QEMUCursor *c;
 249     uint8_t *and_mask, *xor_mask;
 250     size_t size;
 251
 252     c = cursor_alloc(cursor->header.width, cursor->header.height);
 253
 254     if (!c) {
 255         qxl_set_guest_bug(qxl, "%s: cursor %ux%u alloc error", __func__,
 256                 cursor->header.width, cursor->header.height);
 257         goto fail;
 258     }
 259
 260     c->hot_x = cursor->header.hot_spot_x;
 261     c->hot_y = cursor->header.hot_spot_y;
 262     switch (cursor->header.type) {
 263     case SPICE_CURSOR_TYPE_MONO:
 264         /* Assume that the full cursor is available in a single chunk. */
 265         size = 2 * cursor_get_mono_bpl(c) * c->height;
 266         if (size != cursor->data_size) {
 267             fprintf(stderr, "%s: bad monochrome cursor %ux%u with size %u\n",
 268                     __func__, c->width, c->height, cursor->data_size);
 269             goto fail;
 270         }
 271         and_mask = cursor->chunk.data;
 272         xor_mask = and_mask + cursor_get_mono_bpl(c) * c->height;
 273         cursor_set_mono(c, 0xffffff, 0x000000, xor_mask, 1, and_mask);
 274         if (qxl->debug > 2) {
 275             cursor_print_ascii_art(c, "qxl/mono");
 276         }
 277         break;
 278     case SPICE_CURSOR_TYPE_ALPHA:
 279         size = sizeof(uint32_t) * c->width * c->height;
 280         qxl_unpack_chunks(c->data, size, qxl, &cursor->chunk, group_id);
 281         if (qxl->debug > 2) {
 282             cursor_print_ascii_art(c, "qxl/alpha");
 283         }
 284         break;
 285     default:
 286         fprintf(stderr, "%s: not implemented: type %d\n",
 287                 __func__, cursor->header.type);
 288         goto fail;
 289     }
 290     return c;
 291
 292 fail:
 293     cursor_put(c);
 294     return NULL;
 295 }
 296
 297
 298 /* called from spice server thread context only */
 299 int qxl_render_cursor(PCIQXLDevice *qxl, QXLCommandExt *ext)
 300 {
 301     QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id,
 302                                       sizeof(QXLCursorCmd));
 303     QXLCursor *cursor;
 304     QEMUCursor *c;
 305
 306     if (!cmd) {
 307         return 1;
 308     }
 309
 310     if (!dpy_cursor_define_supported(qxl->vga.con)) {
 311         return 0;
 312     }
 313
 314     if (qxl->debug > 1 && cmd->type != QXL_CURSOR_MOVE) {
 315         fprintf(stderr, "%s", __func__);
 316         qxl_log_cmd_cursor(qxl, cmd, ext->group_id);
 317         fprintf(stderr, "\n");
 318     }
 319     switch (cmd->type) {
 320     case QXL_CURSOR_SET:
 321         /* First read the QXLCursor to get QXLDataChunk::data_size ... */
 322         cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id,
 323                                sizeof(QXLCursor));
 324         if (!cursor) {
 325             return 1;
 326         }
 327         /* Then read including the chunked data following QXLCursor. */
 328         cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id,
 329                                sizeof(QXLCursor) + cursor->chunk.data_size);
 330         if (!cursor) {
 331             return 1;
 332         }
 333         c = qxl_cursor(qxl, cursor, ext->group_id);
 334         if (c == NULL) {
 335             c = cursor_builtin_left_ptr();
 336         }
 337         qemu_mutex_lock(&qxl->ssd.lock);
 338         if (qxl->ssd.cursor) {
 339             cursor_put(qxl->ssd.cursor);
 340         }
 341         qxl->ssd.cursor = c;
 342         qxl->ssd.mouse_x = cmd->u.set.position.x;
 343         qxl->ssd.mouse_y = cmd->u.set.position.y;
 344         qemu_mutex_unlock(&qxl->ssd.lock);
 345         qemu_bh_schedule(qxl->ssd.cursor_bh);
 346         break;
 347     case QXL_CURSOR_MOVE:
 348         qemu_mutex_lock(&qxl->ssd.lock);
 349         qxl->ssd.mouse_x = cmd->u.position.x;
 350         qxl->ssd.mouse_y = cmd->u.position.y;
 351         qemu_mutex_unlock(&qxl->ssd.lock);
 352         qemu_bh_schedule(qxl->ssd.cursor_bh);
 353         break;
 354     }
 355     return 0;
 356 }