Archipelago » qemu

/*

 * qxl local rendering (aka display on sdl/vnc)

 *

 * Copyright (C) 2010 Red Hat, Inc.

 *

 * maintained by Gerd Hoffmann <kraxel@redhat.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation; either version 2 or

 * (at your option) version 3 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, see <http://www.gnu.org/licenses/>.

 */

#include "qxl.h"

static void qxl_blit(PCIQXLDevice *qxl, QXLRect *rect)

{

    uint8_t *src;

    uint8_t *dst = ds_get_data(qxl->vga.ds);

    int len, i;

    if (is_buffer_shared(qxl->vga.ds->surface)) {

        return;

    }

    if (!qxl->guest_primary.data) {

        trace_qxl_render_blit_guest_primary_initialized();

        qxl->guest_primary.data = memory_region_get_ram_ptr(&qxl->vga.vram);

    }

    trace_qxl_render_blit(qxl->guest_primary.qxl_stride,

            rect->left, rect->right, rect->top, rect->bottom);

    src = qxl->guest_primary.data;

    if (qxl->guest_primary.qxl_stride < 0) {

        /* qxl surface is upside down, walk src scanlines

         * in reverse order to flip it */

        src += (qxl->guest_primary.surface.height - rect->top - 1) *

            qxl->guest_primary.abs_stride;

    } else {

        src += rect->top * qxl->guest_primary.abs_stride;

    }

    dst += rect->top  * qxl->guest_primary.abs_stride;

    src += rect->left * qxl->guest_primary.bytes_pp;

    dst += rect->left * qxl->guest_primary.bytes_pp;

    len  = (rect->right - rect->left) * qxl->guest_primary.bytes_pp;

    for (i = rect->top; i < rect->bottom; i++) {

        memcpy(dst, src, len);

        dst += qxl->guest_primary.abs_stride;

        src += qxl->guest_primary.qxl_stride;

    }

}

void qxl_render_resize(PCIQXLDevice *qxl)

{

    QXLSurfaceCreate *sc = &qxl->guest_primary.surface;

    qxl->guest_primary.qxl_stride = sc->stride;

    qxl->guest_primary.abs_stride = abs(sc->stride);

    qxl->guest_primary.resized++;

    switch (sc->format) {

    case SPICE_SURFACE_FMT_16_555:

        qxl->guest_primary.bytes_pp = 2;

        qxl->guest_primary.bits_pp = 15;

        break;

    case SPICE_SURFACE_FMT_16_565:

        qxl->guest_primary.bytes_pp = 2;

        qxl->guest_primary.bits_pp = 16;

        break;

    case SPICE_SURFACE_FMT_32_xRGB:

    case SPICE_SURFACE_FMT_32_ARGB:

        qxl->guest_primary.bytes_pp = 4;

        qxl->guest_primary.bits_pp = 32;

        break;

    default:

        fprintf(stderr, "%s: unhandled format: %x\n", __FUNCTION__,

                qxl->guest_primary.surface.format);

        qxl->guest_primary.bytes_pp = 4;

        qxl->guest_primary.bits_pp = 32;

        break;

    }

}

static void qxl_set_rect_to_surface(PCIQXLDevice *qxl, QXLRect *area)

{

    area->left   = 0;

    area->right  = qxl->guest_primary.surface.width;

    area->top    = 0;

    area->bottom = qxl->guest_primary.surface.height;

}

static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)

{

    VGACommonState *vga = &qxl->vga;

    int i;

    if (qxl->guest_primary.resized) {

        qxl->guest_primary.resized = 0;

        qxl->guest_primary.data = memory_region_get_ram_ptr(&qxl->vga.vram);

        qxl_set_rect_to_surface(qxl, &qxl->dirty[0]);

        qxl->num_dirty_rects = 1;

        trace_qxl_render_guest_primary_resized(

               qxl->guest_primary.surface.width,

               qxl->guest_primary.surface.height,

               qxl->guest_primary.qxl_stride,

               qxl->guest_primary.bytes_pp,

               qxl->guest_primary.bits_pp);

        if (qxl->guest_primary.qxl_stride > 0) {

            qemu_free_displaysurface(vga->ds);

            vga->ds->surface = qemu_create_displaysurface_from

                (qxl->guest_primary.surface.width,

                 qxl->guest_primary.surface.height,

                 qxl->guest_primary.bits_pp,

                 qxl->guest_primary.abs_stride,

                 qxl->guest_primary.data,

                 false);

        } else {

            qemu_resize_displaysurface(vga->ds,

                    qxl->guest_primary.surface.width,

                    qxl->guest_primary.surface.height);

        }

        dpy_gfx_resize(vga->ds);

    }

    for (i = 0; i < qxl->num_dirty_rects; i++) {

        if (qemu_spice_rect_is_empty(qxl->dirty+i)) {

            break;

        }

        qxl_blit(qxl, qxl->dirty+i);

        dpy_gfx_update(vga->ds,

                       qxl->dirty[i].left, qxl->dirty[i].top,

                       qxl->dirty[i].right - qxl->dirty[i].left,

                       qxl->dirty[i].bottom - qxl->dirty[i].top);

    }

    qxl->num_dirty_rects = 0;

}

/*

 * use ssd.lock to protect render_update_cookie_num.

 * qxl_render_update is called by io thread or vcpu thread, and the completion

 * callbacks are called by spice_server thread, defering to bh called from the

 * io thread.

 */

void qxl_render_update(PCIQXLDevice *qxl)

{

    QXLCookie *cookie;

    qemu_mutex_lock(&qxl->ssd.lock);

    if (!runstate_is_running() || !qxl->guest_primary.commands) {

        qxl_render_update_area_unlocked(qxl);

        qemu_mutex_unlock(&qxl->ssd.lock);

        return;

    }

    qxl->guest_primary.commands = 0;

    qxl->render_update_cookie_num++;

    qemu_mutex_unlock(&qxl->ssd.lock);

    cookie = qxl_cookie_new(QXL_COOKIE_TYPE_RENDER_UPDATE_AREA,

                            0);

    qxl_set_rect_to_surface(qxl, &cookie->u.render.area);

    qxl_spice_update_area(qxl, 0, &cookie->u.render.area, NULL,

                          0, 1 /* clear_dirty_region */, QXL_ASYNC, cookie);

}

void qxl_render_update_area_bh(void *opaque)

{

    PCIQXLDevice *qxl = opaque;

    qemu_mutex_lock(&qxl->ssd.lock);

    qxl_render_update_area_unlocked(qxl);

    qemu_mutex_unlock(&qxl->ssd.lock);

}

void qxl_render_update_area_done(PCIQXLDevice *qxl, QXLCookie *cookie)

{

    qemu_mutex_lock(&qxl->ssd.lock);

    trace_qxl_render_update_area_done(cookie);

    qemu_bh_schedule(qxl->update_area_bh);

    qxl->render_update_cookie_num--;

    qemu_mutex_unlock(&qxl->ssd.lock);

    g_free(cookie);

}

static QEMUCursor *qxl_cursor(PCIQXLDevice *qxl, QXLCursor *cursor)

{

    QEMUCursor *c;

    uint8_t *image, *mask;

    size_t size;

    c = cursor_alloc(cursor->header.width, cursor->header.height);

    c->hot_x = cursor->header.hot_spot_x;

    c->hot_y = cursor->header.hot_spot_y;

    switch (cursor->header.type) {

    case SPICE_CURSOR_TYPE_ALPHA:

        size = cursor->header.width * cursor->header.height * sizeof(uint32_t);

        memcpy(c->data, cursor->chunk.data, size);

        if (qxl->debug > 2) {

            cursor_print_ascii_art(c, "qxl/alpha");

        }

        break;

    case SPICE_CURSOR_TYPE_MONO:

        mask  = cursor->chunk.data;

        image = mask + cursor_get_mono_bpl(c) * c->width;

        cursor_set_mono(c, 0xffffff, 0x000000, image, 1, mask);

        if (qxl->debug > 2) {

            cursor_print_ascii_art(c, "qxl/mono");

        }

        break;

    default:

        fprintf(stderr, "%s: not implemented: type %d\n",

                __FUNCTION__, cursor->header.type);

        goto fail;

    }

    return c;

fail:

    cursor_put(c);

    return NULL;

}

/* called from spice server thread context only */

int qxl_render_cursor(PCIQXLDevice *qxl, QXLCommandExt *ext)

{

    QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);

    QXLCursor *cursor;

    QEMUCursor *c;

    if (!cmd) {

        return 1;

    }

    if (!dpy_cursor_define_supported(qxl->ssd.ds)) {

        return 0;

    }

    if (qxl->debug > 1 && cmd->type != QXL_CURSOR_MOVE) {

        fprintf(stderr, "%s", __FUNCTION__);

        qxl_log_cmd_cursor(qxl, cmd, ext->group_id);

        fprintf(stderr, "\n");

    }

    switch (cmd->type) {

    case QXL_CURSOR_SET:

        cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id);

        if (!cursor) {

            return 1;

        }

        if (cursor->chunk.data_size != cursor->data_size) {

            fprintf(stderr, "%s: multiple chunks\n", __FUNCTION__);

            return 1;

        }

        c = qxl_cursor(qxl, cursor);

        if (c == NULL) {

            c = cursor_builtin_left_ptr();

        }

        qemu_mutex_lock(&qxl->ssd.lock);

        if (qxl->ssd.cursor) {

            cursor_put(qxl->ssd.cursor);

        }

        qxl->ssd.cursor = c;

        qxl->ssd.mouse_x = cmd->u.set.position.x;

        qxl->ssd.mouse_y = cmd->u.set.position.y;

        qemu_mutex_unlock(&qxl->ssd.lock);

        break;

    case QXL_CURSOR_MOVE:

        qemu_mutex_lock(&qxl->ssd.lock);

        qxl->ssd.mouse_x = cmd->u.position.x;

        qxl->ssd.mouse_y = cmd->u.position.y;

        qemu_mutex_unlock(&qxl->ssd.lock);

        break;

    }

    return 0;

}