qemu/hw/display/qxl-render.c
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   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
  27static 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
  60void 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
  90static 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
  98static 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            goto end;
 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        goto end;
 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
 162end:
 163    if (qxl->render_update_cookie_num == 0) {
 164        graphic_hw_update_done(qxl->ssd.dcl.con);
 165    }
 166}
 167
 168/*
 169 * use ssd.lock to protect render_update_cookie_num.
 170 * qxl_render_update is called by io thread or vcpu thread, and the completion
 171 * callbacks are called by spice_server thread, deferring to bh called from the
 172 * io thread.
 173 */
 174void qxl_render_update(PCIQXLDevice *qxl)
 175{
 176    QXLCookie *cookie;
 177
 178    qemu_mutex_lock(&qxl->ssd.lock);
 179
 180    if (!runstate_is_running() || !qxl->guest_primary.commands ||
 181        qxl->mode == QXL_MODE_UNDEFINED) {
 182        qxl_render_update_area_unlocked(qxl);
 183        qemu_mutex_unlock(&qxl->ssd.lock);
 184        graphic_hw_update_done(qxl->ssd.dcl.con);
 185        return;
 186    }
 187
 188    qxl->guest_primary.commands = 0;
 189    qxl->render_update_cookie_num++;
 190    qemu_mutex_unlock(&qxl->ssd.lock);
 191    cookie = qxl_cookie_new(QXL_COOKIE_TYPE_RENDER_UPDATE_AREA,
 192                            0);
 193    qxl_set_rect_to_surface(qxl, &cookie->u.render.area);
 194    qxl_spice_update_area(qxl, 0, &cookie->u.render.area, NULL,
 195                          0, 1 /* clear_dirty_region */, QXL_ASYNC, cookie);
 196}
 197
 198void qxl_render_update_area_bh(void *opaque)
 199{
 200    PCIQXLDevice *qxl = opaque;
 201
 202    qemu_mutex_lock(&qxl->ssd.lock);
 203    qxl_render_update_area_unlocked(qxl);
 204    qemu_mutex_unlock(&qxl->ssd.lock);
 205}
 206
 207void qxl_render_update_area_done(PCIQXLDevice *qxl, QXLCookie *cookie)
 208{
 209    qemu_mutex_lock(&qxl->ssd.lock);
 210    trace_qxl_render_update_area_done(cookie);
 211    qemu_bh_schedule(qxl->update_area_bh);
 212    qxl->render_update_cookie_num--;
 213    qemu_mutex_unlock(&qxl->ssd.lock);
 214    g_free(cookie);
 215}
 216
 217static void qxl_unpack_chunks(void *dest, size_t size, PCIQXLDevice *qxl,
 218                              QXLDataChunk *chunk, uint32_t group_id)
 219{
 220    uint32_t max_chunks = 32;
 221    size_t offset = 0;
 222    size_t bytes;
 223
 224    for (;;) {
 225        bytes = MIN(size - offset, chunk->data_size);
 226        memcpy(dest + offset, chunk->data, bytes);
 227        offset += bytes;
 228        if (offset == size) {
 229            return;
 230        }
 231        chunk = qxl_phys2virt(qxl, chunk->next_chunk, group_id);
 232        if (!chunk) {
 233            return;
 234        }
 235        max_chunks--;
 236        if (max_chunks == 0) {
 237            return;
 238        }
 239    }
 240}
 241
 242static QEMUCursor *qxl_cursor(PCIQXLDevice *qxl, QXLCursor *cursor,
 243                              uint32_t group_id)
 244{
 245    QEMUCursor *c;
 246    uint8_t *and_mask, *xor_mask;
 247    size_t size;
 248
 249    c = cursor_alloc(cursor->header.width, cursor->header.height);
 250
 251    if (!c) {
 252        qxl_set_guest_bug(qxl, "%s: cursor %ux%u alloc error", __func__,
 253                cursor->header.width, cursor->header.height);
 254        goto fail;
 255    }
 256
 257    c->hot_x = cursor->header.hot_spot_x;
 258    c->hot_y = cursor->header.hot_spot_y;
 259    switch (cursor->header.type) {
 260    case SPICE_CURSOR_TYPE_MONO:
 261        /* Assume that the full cursor is available in a single chunk. */
 262        size = 2 * cursor_get_mono_bpl(c) * c->height;
 263        if (size != cursor->data_size) {
 264            fprintf(stderr, "%s: bad monochrome cursor %ux%u with size %u\n",
 265                    __func__, c->width, c->height, cursor->data_size);
 266            goto fail;
 267        }
 268        and_mask = cursor->chunk.data;
 269        xor_mask = and_mask + cursor_get_mono_bpl(c) * c->height;
 270        cursor_set_mono(c, 0xffffff, 0x000000, xor_mask, 1, and_mask);
 271        if (qxl->debug > 2) {
 272            cursor_print_ascii_art(c, "qxl/mono");
 273        }
 274        break;
 275    case SPICE_CURSOR_TYPE_ALPHA:
 276        size = sizeof(uint32_t) * c->width * c->height;
 277        qxl_unpack_chunks(c->data, size, qxl, &cursor->chunk, group_id);
 278        if (qxl->debug > 2) {
 279            cursor_print_ascii_art(c, "qxl/alpha");
 280        }
 281        break;
 282    default:
 283        fprintf(stderr, "%s: not implemented: type %d\n",
 284                __func__, cursor->header.type);
 285        goto fail;
 286    }
 287    return c;
 288
 289fail:
 290    cursor_put(c);
 291    return NULL;
 292}
 293
 294
 295/* called from spice server thread context only */
 296int qxl_render_cursor(PCIQXLDevice *qxl, QXLCommandExt *ext)
 297{
 298    QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
 299    QXLCursor *cursor;
 300    QEMUCursor *c;
 301
 302    if (!cmd) {
 303        return 1;
 304    }
 305
 306    if (!dpy_cursor_define_supported(qxl->vga.con)) {
 307        return 0;
 308    }
 309
 310    if (qxl->debug > 1 && cmd->type != QXL_CURSOR_MOVE) {
 311        fprintf(stderr, "%s", __func__);
 312        qxl_log_cmd_cursor(qxl, cmd, ext->group_id);
 313        fprintf(stderr, "\n");
 314    }
 315    switch (cmd->type) {
 316    case QXL_CURSOR_SET:
 317        cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id);
 318        if (!cursor) {
 319            return 1;
 320        }
 321        c = qxl_cursor(qxl, cursor, ext->group_id);
 322        if (c == NULL) {
 323            c = cursor_builtin_left_ptr();
 324        }
 325        qemu_mutex_lock(&qxl->ssd.lock);
 326        if (qxl->ssd.cursor) {
 327            cursor_put(qxl->ssd.cursor);
 328        }
 329        qxl->ssd.cursor = c;
 330        qxl->ssd.mouse_x = cmd->u.set.position.x;
 331        qxl->ssd.mouse_y = cmd->u.set.position.y;
 332        qemu_mutex_unlock(&qxl->ssd.lock);
 333        qemu_bh_schedule(qxl->ssd.cursor_bh);
 334        break;
 335    case QXL_CURSOR_MOVE:
 336        qemu_mutex_lock(&qxl->ssd.lock);
 337        qxl->ssd.mouse_x = cmd->u.position.x;
 338        qxl->ssd.mouse_y = cmd->u.position.y;
 339        qemu_mutex_unlock(&qxl->ssd.lock);
 340        qemu_bh_schedule(qxl->ssd.cursor_bh);
 341        break;
 342    }
 343    return 0;
 344}
 345