spice: add qxl device

qxl is a paravirtual graphics card.  The qxl device is the bridge
between the guest and the spice server (aka libspice-server).  The
spice server will send the rendering commands to the spice client, which
will actually render them.

The spice server is also able to render locally, which is done in case
the guest wants read something from video memory.  Local rendering is
also used to support display over vnc and sdl.

qxl is activated using "-vga qxl".  qxl supports multihead, additional
cards can be added via '-device qxl".

[ v2: add copyright to files                     ]
[ v2: use qemu-common.h for standard includes    ]
[ v2: create separate qxl-vga device for primary ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 226 insertions, 0 deletions

diff --git a/hw/qxl-render.c b/hw/qxl-render.c
new file mode 100644
index 0000000000..58965e0179
--- /dev/null
+++ b/hw/qxl-render.c
@@ -0,0 +1,226 @@
+/*
+ * 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_flip(PCIQXLDevice *qxl, QXLRect *rect)
+{
+    uint8_t *src = qxl->guest_primary.data;
+    uint8_t *dst = qxl->guest_primary.flipped;
+    int len, i;
+
+    src += (qxl->guest_primary.surface.height - rect->top - 1) *
+        qxl->guest_primary.stride;
+    dst += rect->top  * qxl->guest_primary.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.stride;
+        src -= qxl->guest_primary.stride;
+    }
+}
+
+void qxl_render_resize(PCIQXLDevice *qxl)
+{
+    QXLSurfaceCreate *sc = &qxl->guest_primary.surface;
+
+    qxl->guest_primary.stride = 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;
+    }
+}
+
+void qxl_render_update(PCIQXLDevice *qxl)
+{
+    VGACommonState *vga = &qxl->vga;
+    QXLRect dirty[32], update;
+    void *ptr;
+    int i;
+
+    if (qxl->guest_primary.resized) {
+        qxl->guest_primary.resized = 0;
+
+        if (qxl->guest_primary.flipped) {
+            qemu_free(qxl->guest_primary.flipped);
+            qxl->guest_primary.flipped = NULL;
+        }
+        qemu_free_displaysurface(vga->ds);
+
+        qxl->guest_primary.data = qemu_get_ram_ptr(qxl->vga.vram_offset);
+        if (qxl->guest_primary.stride < 0) {
+            /* spice surface is upside down -> need extra buffer to flip */
+            qxl->guest_primary.stride = -qxl->guest_primary.stride;
+            qxl->guest_primary.flipped = qemu_malloc(qxl->guest_primary.surface.width *
+                                                     qxl->guest_primary.stride);
+            ptr = qxl->guest_primary.flipped;
+        } else {
+            ptr = qxl->guest_primary.data;
+        }
+        dprint(qxl, 1, "%s: %dx%d, stride %d, bpp %d, depth %d, flip %s\n",
+               __FUNCTION__,
+               qxl->guest_primary.surface.width,
+               qxl->guest_primary.surface.height,
+               qxl->guest_primary.stride,
+               qxl->guest_primary.bytes_pp,
+               qxl->guest_primary.bits_pp,
+               qxl->guest_primary.flipped ? "yes" : "no");
+        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.stride,
+                                            ptr);
+        dpy_resize(vga->ds);
+    }
+
+    if (!qxl->guest_primary.commands) {
+        return;
+    }
+    qxl->guest_primary.commands = 0;
+
+    update.left   = 0;
+    update.right  = qxl->guest_primary.surface.width;
+    update.top    = 0;
+    update.bottom = qxl->guest_primary.surface.height;
+
+    memset(dirty, 0, sizeof(dirty));
+    qxl->ssd.worker->update_area(qxl->ssd.worker, 0, &update,
+                                 dirty, ARRAY_SIZE(dirty), 1);
+
+    for (i = 0; i < ARRAY_SIZE(dirty); i++) {
+        if (qemu_spice_rect_is_empty(dirty+i)) {
+            break;
+        }
+        if (qxl->guest_primary.flipped) {
+            qxl_flip(qxl, dirty+i);
+        }
+        dpy_update(vga->ds,
+                   dirty[i].left, dirty[i].top,
+                   dirty[i].right - dirty[i].left,
+                   dirty[i].bottom - dirty[i].top);
+    }
+}
+
+static QEMUCursor *qxl_cursor(PCIQXLDevice *qxl, QXLCursor *cursor)
+{
+    QEMUCursor *c;
+    uint8_t *image, *mask;
+    int 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 */
+void qxl_render_cursor(PCIQXLDevice *qxl, QXLCommandExt *ext)
+{
+    QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
+    QXLCursor *cursor;
+    QEMUCursor *c;
+    int x = -1, y = -1;
+
+    if (!qxl->ssd.ds->mouse_set || !qxl->ssd.ds->cursor_define) {
+        return;
+    }
+
+    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:
+        x = cmd->u.set.position.x;
+        y = cmd->u.set.position.y;
+        cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id);
+        if (cursor->chunk.data_size != cursor->data_size) {
+            fprintf(stderr, "%s: multiple chunks\n", __FUNCTION__);
+            return;
+        }
+        c = qxl_cursor(qxl, cursor);
+        if (c == NULL) {
+            c = cursor_builtin_left_ptr();
+        }
+        qemu_mutex_lock_iothread();
+        qxl->ssd.ds->cursor_define(c);
+        qxl->ssd.ds->mouse_set(x, y, 1);
+        qemu_mutex_unlock_iothread();
+        cursor_put(c);
+        break;
+    case QXL_CURSOR_MOVE:
+        x = cmd->u.position.x;
+        y = cmd->u.position.y;
+        qemu_mutex_lock_iothread();
+        qxl->ssd.ds->mouse_set(x, y, 1);
+        qemu_mutex_unlock_iothread();
+        break;
+    }
+}