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 "trace.h"
  25
  26 static void qxl_blit(PCIQXLDevice *qxl, QXLRect *rect)
  27 {
  28     DisplaySurface *surface = qemu_console_surface(qxl->vga.con);
  29     uint8_t *dst = surface_data(surface);
  30     uint8_t *src;
  31     int len, i;
  32
  33     if (is_buffer_shared(surface)) {
  34         return;
  35     }
  36     trace_qxl_render_blit(qxl->guest_primary.qxl_stride,
  37             rect->left, rect->right, rect->top, rect->bottom);
  38     src = qxl->guest_primary.data;
  39     if (qxl->guest_primary.qxl_stride < 0) {
  40         /* qxl surface is upside down, walk src scanlines
  41          * in reverse order to flip it */
  42         src += (qxl->guest_primary.surface.height - rect->top - 1) *
  43             qxl->guest_primary.abs_stride;
  44     } else {
  45         src += rect->top * qxl->guest_primary.abs_stride;
  46     }
  47     dst += rect->top  * qxl->guest_primary.abs_stride;
  48     src += rect->left * qxl->guest_primary.bytes_pp;
  49     dst += rect->left * qxl->guest_primary.bytes_pp;
  50     len  = (rect->right - rect->left) * qxl->guest_primary.bytes_pp;
  51
  52     for (i = rect->top; i < rect->bottom; i++) {
  53         memcpy(dst, src, len);
  54         dst += qxl->guest_primary.abs_stride;
  55         src += qxl->guest_primary.qxl_stride;
  56     }
  57 }
  58
  59 void qxl_render_resize(PCIQXLDevice *qxl)
  60 {
  61     QXLSurfaceCreate *sc = &qxl->guest_primary.surface;
  62
  63     qxl->guest_primary.qxl_stride = sc->stride;
  64     qxl->guest_primary.abs_stride = abs(sc->stride);
  65     qxl->guest_primary.resized++;
  66     switch (sc->format) {
  67     case SPICE_SURFACE_FMT_16_555:
  68         qxl->guest_primary.bytes_pp = 2;
  69         qxl->guest_primary.bits_pp = 15;
  70         break;
  71     case SPICE_SURFACE_FMT_16_565:
  72         qxl->guest_primary.bytes_pp = 2;
  73         qxl->guest_primary.bits_pp = 16;
  74         break;
  75     case SPICE_SURFACE_FMT_32_xRGB:
  76     case SPICE_SURFACE_FMT_32_ARGB:
  77         qxl->guest_primary.bytes_pp = 4;
  78         qxl->guest_primary.bits_pp = 32;
  79         break;
  80     default:
  81         fprintf(stderr, "%s: unhandled format: %x\n", __func__,
  82                 qxl->guest_primary.surface.format);
  83         qxl->guest_primary.bytes_pp = 4;
  84         qxl->guest_primary.bits_pp = 32;
  85         break;
  86     }
  87 }
  88
  89 static void qxl_set_rect_to_surface(PCIQXLDevice *qxl, QXLRect *area)
  90 {
  91     area->left   = 0;
  92     area->right  = qxl->guest_primary.surface.width;
  93     area->top    = 0;
  94     area->bottom = qxl->guest_primary.surface.height;
  95 }
  96
  97 static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
  98 {
  99     VGACommonState *vga = &qxl->vga;
 100     DisplaySurface *surface;
 101     int i;
 102
 103     if (qxl->guest_primary.resized) {
 104         qxl->guest_primary.resized = 0;
 105         qxl->guest_primary.data = qxl_phys2virt(qxl,
 106                                                 qxl->guest_primary.surface.mem,
 107                                                 MEMSLOT_GROUP_GUEST);
 108         if (!qxl->guest_primary.data) {
 109             return;
 110         }
 111         qxl_set_rect_to_surface(qxl, &qxl->dirty[0]);
 112         qxl->num_dirty_rects = 1;
 113         trace_qxl_render_guest_primary_resized(
 114                qxl->guest_primary.surface.width,
 115                qxl->guest_primary.surface.height,
 116                qxl->guest_primary.qxl_stride,
 117                qxl->guest_primary.bytes_pp,
 118                qxl->guest_primary.bits_pp);
 119         if (qxl->guest_primary.qxl_stride > 0) {
 120             pixman_format_code_t format =
 121                 qemu_default_pixman_format(qxl->guest_primary.bits_pp, true);
 122             surface = qemu_create_displaysurface_from
 123                 (qxl->guest_primary.surface.width,
 124                  qxl->guest_primary.surface.height,
 125                  format,
 126                  qxl->guest_primary.abs_stride,
 127                  qxl->guest_primary.data);
 128         } else {
 129             surface = qemu_create_displaysurface
 130                 (qxl->guest_primary.surface.width,
 131                  qxl->guest_primary.surface.height);
 132         }
 133         dpy_gfx_replace_surface(vga->con, surface);
 134     }
 135
 136     if (!qxl->guest_primary.data) {
 137         return;
 138     }
 139     for (i = 0; i < qxl->num_dirty_rects; i++) {
 140         if (qemu_spice_rect_is_empty(qxl->dirty+i)) {
 141             break;
 142         }
 143         if (qxl->dirty[i].left < 0 ||
 144             qxl->dirty[i].top < 0 ||
 145             qxl->dirty[i].left > qxl->dirty[i].right ||
 146             qxl->dirty[i].top > qxl->dirty[i].bottom ||
 147             qxl->dirty[i].right > qxl->guest_primary.surface.width ||
 148             qxl->dirty[i].bottom > qxl->guest_primary.surface.height) {
 149             continue;
 150         }
 151         qxl_blit(qxl, qxl->dirty+i);
 152         dpy_gfx_update(vga->con,
 153                        qxl->dirty[i].left, qxl->dirty[i].top,
 154                        qxl->dirty[i].right - qxl->dirty[i].left,
 155                        qxl->dirty[i].bottom - qxl->dirty[i].top);
 156     }
 157     qxl->num_dirty_rects = 0;
 158 }
 159
 160 /*
 161  * use ssd.lock to protect render_update_cookie_num.
 162  * qxl_render_update is called by io thread or vcpu thread, and the completion
 163  * callbacks are called by spice_server thread, deferring to bh called from the
 164  * io thread.
 165  */
 166 void qxl_render_update(PCIQXLDevice *qxl)
 167 {
 168     QXLCookie *cookie;
 169
 170     qemu_mutex_lock(&qxl->ssd.lock);
 171
 172     if (!runstate_is_running() || !qxl->guest_primary.commands ||
 173         qxl->mode == QXL_MODE_UNDEFINED) {
 174         qxl_render_update_area_unlocked(qxl);
 175         qemu_mutex_unlock(&qxl->ssd.lock);
 176         return;
 177     }
 178
 179     qxl->guest_primary.commands = 0;
 180     qxl->render_update_cookie_num++;
 181     qemu_mutex_unlock(&qxl->ssd.lock);
 182     cookie = qxl_cookie_new(QXL_COOKIE_TYPE_RENDER_UPDATE_AREA,
 183                             0);
 184     qxl_set_rect_to_surface(qxl, &cookie->u.render.area);
 185     qxl_spice_update_area(qxl, 0, &cookie->u.render.area, NULL,
 186                           0, 1 /* clear_dirty_region */, QXL_ASYNC, cookie);
 187 }
 188
 189 void qxl_render_update_area_bh(void *opaque)
 190 {
 191     PCIQXLDevice *qxl = opaque;
 192
 193     qemu_mutex_lock(&qxl->ssd.lock);
 194     qxl_render_update_area_unlocked(qxl);
 195     qemu_mutex_unlock(&qxl->ssd.lock);
 196 }
 197
 198 void qxl_render_update_area_done(PCIQXLDevice *qxl, QXLCookie *cookie)
 199 {
 200     qemu_mutex_lock(&qxl->ssd.lock);
 201     trace_qxl_render_update_area_done(cookie);
 202     qemu_bh_schedule(qxl->update_area_bh);
 203     qxl->render_update_cookie_num--;
 204     qemu_mutex_unlock(&qxl->ssd.lock);
 205     g_free(cookie);
 206 }
 207
 208 static void qxl_unpack_chunks(void *dest, size_t size, PCIQXLDevice *qxl,
 209                               QXLDataChunk *chunk, uint32_t group_id)
 210 {
 211     uint32_t max_chunks = 32;
 212     size_t offset = 0;
 213     size_t bytes;
 214
 215     for (;;) {
 216         bytes = MIN(size - offset, chunk->data_size);
 217         memcpy(dest + offset, chunk->data, bytes);
 218         offset += bytes;
 219         if (offset == size) {
 220             return;
 221         }
 222         chunk = qxl_phys2virt(qxl, chunk->next_chunk, group_id);
 223         if (!chunk) {
 224             return;
 225         }
 226         max_chunks--;
 227         if (max_chunks == 0) {
 228             return;
 229         }
 230     }
 231 }
 232
 233 static QEMUCursor *qxl_cursor(PCIQXLDevice *qxl, QXLCursor *cursor,
 234                               uint32_t group_id)
 235 {
 236     QEMUCursor *c;
 237     size_t size;
 238
 239     c = cursor_alloc(cursor->header.width, cursor->header.height);
 240     c->hot_x = cursor->header.hot_spot_x;
 241     c->hot_y = cursor->header.hot_spot_y;
 242     switch (cursor->header.type) {
 243     case SPICE_CURSOR_TYPE_ALPHA:
 244         size = sizeof(uint32_t) * cursor->header.width * cursor->header.height;
 245         qxl_unpack_chunks(c->data, size, qxl, &cursor->chunk, group_id);
 246         if (qxl->debug > 2) {
 247             cursor_print_ascii_art(c, "qxl/alpha");
 248         }
 249         break;
 250     default:
 251         fprintf(stderr, "%s: not implemented: type %d\n",
 252                 __func__, cursor->header.type);
 253         goto fail;
 254     }
 255     return c;
 256
 257 fail:
 258     cursor_put(c);
 259     return NULL;
 260 }
 261
 262
 263 /* called from spice server thread context only */
 264 int qxl_render_cursor(PCIQXLDevice *qxl, QXLCommandExt *ext)
 265 {
 266     QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
 267     QXLCursor *cursor;
 268     QEMUCursor *c;
 269
 270     if (!cmd) {
 271         return 1;
 272     }
 273
 274     if (!dpy_cursor_define_supported(qxl->vga.con)) {
 275         return 0;
 276     }
 277
 278     if (qxl->debug > 1 && cmd->type != QXL_CURSOR_MOVE) {
 279         fprintf(stderr, "%s", __func__);
 280         qxl_log_cmd_cursor(qxl, cmd, ext->group_id);
 281         fprintf(stderr, "\n");
 282     }
 283     switch (cmd->type) {
 284     case QXL_CURSOR_SET:
 285         cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id);
 286         if (!cursor) {
 287             return 1;
 288         }
 289         c = qxl_cursor(qxl, cursor, ext->group_id);
 290         if (c == NULL) {
 291             c = cursor_builtin_left_ptr();
 292         }
 293         qemu_mutex_lock(&qxl->ssd.lock);
 294         if (qxl->ssd.cursor) {
 295             cursor_put(qxl->ssd.cursor);
 296         }
 297         qxl->ssd.cursor = c;
 298         qxl->ssd.mouse_x = cmd->u.set.position.x;
 299         qxl->ssd.mouse_y = cmd->u.set.position.y;
 300         qemu_mutex_unlock(&qxl->ssd.lock);
 301         qemu_bh_schedule(qxl->ssd.cursor_bh);
 302         break;
 303     case QXL_CURSOR_MOVE:
 304         qemu_mutex_lock(&qxl->ssd.lock);
 305         qxl->ssd.mouse_x = cmd->u.position.x;
 306         qxl->ssd.mouse_y = cmd->u.position.y;
 307         qemu_mutex_unlock(&qxl->ssd.lock);
 308         qemu_bh_schedule(qxl->ssd.cursor_bh);
 309         break;
 310     }
 311     return 0;
 312 }