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         if (!qxl->guest_primary.data) {
 112             return;
 113         }
 114         qxl_set_rect_to_surface(qxl, &qxl->dirty[0]);
 115         qxl->num_dirty_rects = 1;
 116         trace_qxl_render_guest_primary_resized(
 117                width,
 118                height,
 119                qxl->guest_primary.qxl_stride,
 120                qxl->guest_primary.bytes_pp,
 121                qxl->guest_primary.bits_pp);
 122         if (qxl->guest_primary.qxl_stride > 0) {
 123             pixman_format_code_t format =
 124                 qemu_default_pixman_format(qxl->guest_primary.bits_pp, true);
 125             surface = qemu_create_displaysurface_from
 126                 (width,
 127                  height,
 128                  format,
 129                  qxl->guest_primary.abs_stride,
 130                  qxl->guest_primary.data);
 131         } else {
 132             surface = qemu_create_displaysurface
 133                 (width,
 134                  height);
 135         }
 136         dpy_gfx_replace_surface(vga->con, surface);
 137     }
 138
 139     if (!qxl->guest_primary.data) {
 140         return;
 141     }
 142     for (i = 0; i < qxl->num_dirty_rects; i++) {
 143         if (qemu_spice_rect_is_empty(qxl->dirty+i)) {
 144             break;
 145         }
 146         if (qxl->dirty[i].left < 0 ||
 147             qxl->dirty[i].top < 0 ||
 148             qxl->dirty[i].left > qxl->dirty[i].right ||
 149             qxl->dirty[i].top > qxl->dirty[i].bottom ||
 150             qxl->dirty[i].right > width ||
 151             qxl->dirty[i].bottom > height) {
 152             continue;
 153         }
 154         qxl_blit(qxl, qxl->dirty+i);
 155         dpy_gfx_update(vga->con,
 156                        qxl->dirty[i].left, qxl->dirty[i].top,
 157                        qxl->dirty[i].right - qxl->dirty[i].left,
 158                        qxl->dirty[i].bottom - qxl->dirty[i].top);
 159     }
 160     qxl->num_dirty_rects = 0;
 161 }
 162
 163 /*
 164  * use ssd.lock to protect render_update_cookie_num.
 165  * qxl_render_update is called by io thread or vcpu thread, and the completion
 166  * callbacks are called by spice_server thread, deferring to bh called from the
 167  * io thread.
 168  */
 169 void qxl_render_update(PCIQXLDevice *qxl)
 170 {
 171     QXLCookie *cookie;
 172
 173     qemu_mutex_lock(&qxl->ssd.lock);
 174
 175     if (!runstate_is_running() || !qxl->guest_primary.commands ||
 176         qxl->mode == QXL_MODE_UNDEFINED) {
 177         qxl_render_update_area_unlocked(qxl);
 178         qemu_mutex_unlock(&qxl->ssd.lock);
 179         return;
 180     }
 181
 182     qxl->guest_primary.commands = 0;
 183     qxl->render_update_cookie_num++;
 184     qemu_mutex_unlock(&qxl->ssd.lock);
 185     cookie = qxl_cookie_new(QXL_COOKIE_TYPE_RENDER_UPDATE_AREA,
 186                             0);
 187     qxl_set_rect_to_surface(qxl, &cookie->u.render.area);
 188     qxl_spice_update_area(qxl, 0, &cookie->u.render.area, NULL,
 189                           0, 1 /* clear_dirty_region */, QXL_ASYNC, cookie);
 190 }
 191
 192 void qxl_render_update_area_bh(void *opaque)
 193 {
 194     PCIQXLDevice *qxl = opaque;
 195
 196     qemu_mutex_lock(&qxl->ssd.lock);
 197     qxl_render_update_area_unlocked(qxl);
 198     qemu_mutex_unlock(&qxl->ssd.lock);
 199 }
 200
 201 void qxl_render_update_area_done(PCIQXLDevice *qxl, QXLCookie *cookie)
 202 {
 203     qemu_mutex_lock(&qxl->ssd.lock);
 204     trace_qxl_render_update_area_done(cookie);
 205     qemu_bh_schedule(qxl->update_area_bh);
 206     qxl->render_update_cookie_num--;
 207     qemu_mutex_unlock(&qxl->ssd.lock);
 208     g_free(cookie);
 209 }
 210
 211 static void qxl_unpack_chunks(void *dest, size_t size, PCIQXLDevice *qxl,
 212                               QXLDataChunk *chunk, uint32_t group_id)
 213 {
 214     uint32_t max_chunks = 32;
 215     size_t offset = 0;
 216     size_t bytes;
 217
 218     for (;;) {
 219         bytes = MIN(size - offset, chunk->data_size);
 220         memcpy(dest + offset, chunk->data, bytes);
 221         offset += bytes;
 222         if (offset == size) {
 223             return;
 224         }
 225         chunk = qxl_phys2virt(qxl, chunk->next_chunk, group_id);
 226         if (!chunk) {
 227             return;
 228         }
 229         max_chunks--;
 230         if (max_chunks == 0) {
 231             return;
 232         }
 233     }
 234 }
 235
 236 static QEMUCursor *qxl_cursor(PCIQXLDevice *qxl, QXLCursor *cursor,
 237                               uint32_t group_id)
 238 {
 239     QEMUCursor *c;
 240     uint8_t *and_mask, *xor_mask;
 241     size_t size;
 242
 243     c = cursor_alloc(cursor->header.width, cursor->header.height);
 244     c->hot_x = cursor->header.hot_spot_x;
 245     c->hot_y = cursor->header.hot_spot_y;
 246     switch (cursor->header.type) {
 247     case SPICE_CURSOR_TYPE_MONO:
 248         /* Assume that the full cursor is available in a single chunk. */
 249         size = 2 * cursor_get_mono_bpl(c) * c->height;
 250         if (size != cursor->data_size) {
 251             fprintf(stderr, "%s: bad monochrome cursor %ux%u with size %u\n",
 252                     __func__, c->width, c->height, cursor->data_size);
 253             goto fail;
 254         }
 255         and_mask = cursor->chunk.data;
 256         xor_mask = and_mask + cursor_get_mono_bpl(c) * c->height;
 257         cursor_set_mono(c, 0xffffff, 0x000000, xor_mask, 1, and_mask);
 258         if (qxl->debug > 2) {
 259             cursor_print_ascii_art(c, "qxl/mono");
 260         }
 261         break;
 262     case SPICE_CURSOR_TYPE_ALPHA:
 263         size = sizeof(uint32_t) * cursor->header.width * cursor->header.height;
 264         qxl_unpack_chunks(c->data, size, qxl, &cursor->chunk, group_id);
 265         if (qxl->debug > 2) {
 266             cursor_print_ascii_art(c, "qxl/alpha");
 267         }
 268         break;
 269     default:
 270         fprintf(stderr, "%s: not implemented: type %d\n",
 271                 __func__, cursor->header.type);
 272         goto fail;
 273     }
 274     return c;
 275
 276 fail:
 277     cursor_put(c);
 278     return NULL;
 279 }
 280
 281
 282 /* called from spice server thread context only */
 283 int qxl_render_cursor(PCIQXLDevice *qxl, QXLCommandExt *ext)
 284 {
 285     QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
 286     QXLCursor *cursor;
 287     QEMUCursor *c;
 288
 289     if (!cmd) {
 290         return 1;
 291     }
 292
 293     if (!dpy_cursor_define_supported(qxl->vga.con)) {
 294         return 0;
 295     }
 296
 297     if (qxl->debug > 1 && cmd->type != QXL_CURSOR_MOVE) {
 298         fprintf(stderr, "%s", __func__);
 299         qxl_log_cmd_cursor(qxl, cmd, ext->group_id);
 300         fprintf(stderr, "\n");
 301     }
 302     switch (cmd->type) {
 303     case QXL_CURSOR_SET:
 304         cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id);
 305         if (!cursor) {
 306             return 1;
 307         }
 308         c = qxl_cursor(qxl, cursor, ext->group_id);
 309         if (c == NULL) {
 310             c = cursor_builtin_left_ptr();
 311         }
 312         qemu_mutex_lock(&qxl->ssd.lock);
 313         if (qxl->ssd.cursor) {
 314             cursor_put(qxl->ssd.cursor);
 315         }
 316         qxl->ssd.cursor = c;
 317         qxl->ssd.mouse_x = cmd->u.set.position.x;
 318         qxl->ssd.mouse_y = cmd->u.set.position.y;
 319         qemu_mutex_unlock(&qxl->ssd.lock);
 320         qemu_bh_schedule(qxl->ssd.cursor_bh);
 321         break;
 322     case QXL_CURSOR_MOVE:
 323         qemu_mutex_lock(&qxl->ssd.lock);
 324         qxl->ssd.mouse_x = cmd->u.position.x;
 325         qxl->ssd.mouse_y = cmd->u.position.y;
 326         qemu_mutex_unlock(&qxl->ssd.lock);
 327         qemu_bh_schedule(qxl->ssd.cursor_bh);
 328         break;
 329     }
 330     return 0;
 331 }