ui: add egl-headless

ui: some vnc cleanups
 ui: absolute events for input-linux
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Merge remote-tracking branch 'kraxel/tags/pull-ui-20170512-1' into staging

ui: add egl-headless
ui: some vnc cleanups
ui: absolute events for input-linux

# gpg: Signature made Fri 12 May 2017 12:50:07 PM BST
# gpg:                using RSA key 0x4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* kraxel/tags/pull-ui-20170512-1:
  vnc: replace hweight_long() with ctpopl()
  vnc: simple clean up
  opengl: add egl-headless display
  egl: explicitly ask for core context
  egl-helpers: add missing error check
  egl-helpers: fix display init for x11
  egl-helpers: drop support for gles and debug logging
  virtio-gpu: move virtio_gpu_gl_block
  ui: input-linux: Add absolute event support
  ui: Support non-zero minimum values for absolute input axes

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

hw/display/virtio-gpu-3d.c

@@ -600,6 +600,22 @@ void virtio_gpu_virgl_reset(VirtIOGPU *g)
     }
 }
 
+void virtio_gpu_gl_block(void *opaque, bool block)
+{
+    VirtIOGPU *g = opaque;
+
+    if (block) {
+        g->renderer_blocked++;
+    } else {
+        g->renderer_blocked--;
+    }
+    assert(g->renderer_blocked >= 0);
+
+    if (g->renderer_blocked == 0) {
+        virtio_gpu_process_cmdq(g);
+    }
+}
+
 int virtio_gpu_virgl_init(VirtIOGPU *g)
 {
     int ret;

hw/display/virtio-gpu.c

@@ -929,28 +929,14 @@ static int virtio_gpu_ui_info(void *opaque, uint32_t idx, QemuUIInfo *info)
     return 0;
 }
 
-static void virtio_gpu_gl_block(void *opaque, bool block)
-{
-    VirtIOGPU *g = opaque;
-
-    if (block) {
-        g->renderer_blocked++;
-    } else {
-        g->renderer_blocked--;
-    }
-    assert(g->renderer_blocked >= 0);
-
-    if (g->renderer_blocked == 0) {
-        virtio_gpu_process_cmdq(g);
-    }
-}
-
 const GraphicHwOps virtio_gpu_ops = {
     .invalidate = virtio_gpu_invalidate_display,
     .gfx_update = virtio_gpu_update_display,
     .text_update = virtio_gpu_text_update,
     .ui_info = virtio_gpu_ui_info,
+#ifdef CONFIG_VIRGL
     .gl_block = virtio_gpu_gl_block,
+#endif
 };
 
 static const VMStateDescription vmstate_virtio_gpu_scanout = {

hw/input/virtio-input-hid.c

@@ -484,12 +484,14 @@ static struct virtio_input_config virtio_tablet_config[] = {
         .select    = VIRTIO_INPUT_CFG_ABS_INFO,
         .subsel    = ABS_X,
         .size      = sizeof(virtio_input_absinfo),
-        .u.abs.max = const_le32(INPUT_EVENT_ABS_SIZE - 1),
+        .u.abs.min = const_le32(INPUT_EVENT_ABS_MIN),
+        .u.abs.max = const_le32(INPUT_EVENT_ABS_MAX),
     },{
         .select    = VIRTIO_INPUT_CFG_ABS_INFO,
         .subsel    = ABS_Y,
         .size      = sizeof(virtio_input_absinfo),
-        .u.abs.max = const_le32(INPUT_EVENT_ABS_SIZE - 1),
+        .u.abs.min = const_le32(INPUT_EVENT_ABS_MIN),
+        .u.abs.max = const_le32(INPUT_EVENT_ABS_MAX),
     },
     { /* end of list */ },
 };

include/hw/virtio/virtio-gpu.h

@@ -169,6 +169,7 @@ void virtio_gpu_virgl_process_cmd(VirtIOGPU *g,
                                   struct virtio_gpu_ctrl_command *cmd);
 void virtio_gpu_virgl_fence_poll(VirtIOGPU *g);
 void virtio_gpu_virgl_reset(VirtIOGPU *g);
+void virtio_gpu_gl_block(void *opaque, bool block);
 int virtio_gpu_virgl_init(VirtIOGPU *g);
 
 #endif

include/qemu/bitops.h

@@ -201,16 +201,6 @@ static inline unsigned long find_first_zero_bit(const unsigned long *addr,
     return find_next_zero_bit(addr, size, 0);
 }
 
-static inline unsigned long hweight_long(unsigned long w)
-{
-    unsigned long count;
-
-    for (count = 0; w; w >>= 1) {
-        count += w & 1;
-    }
-    return count;
-}
-
 /**
  * rol8 - rotate an 8-bit value left
  * @word: value to rotate

include/ui/console.h

@@ -527,4 +527,7 @@ static inline void early_gtk_display_init(int opengl)
 }
 #endif
 
+/* egl-headless.c */
+void egl_headless_init(void);
+
 #endif

include/ui/egl-helpers.h

@@ -21,7 +21,8 @@ int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc);
 
 EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win);
 
-int qemu_egl_init_dpy(EGLNativeDisplayType dpy, bool gles, bool debug);
+int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy);
+int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy);
 EGLContext qemu_egl_init_ctx(void);
 
 #endif /* EGL_HELPERS_H */

include/ui/input.h

@@ -8,7 +8,8 @@
 #define INPUT_EVENT_MASK_REL   (1<<INPUT_EVENT_KIND_REL)
 #define INPUT_EVENT_MASK_ABS   (1<<INPUT_EVENT_KIND_ABS)
 
-#define INPUT_EVENT_ABS_SIZE   0x8000
+#define INPUT_EVENT_ABS_MIN    0x0000
+#define INPUT_EVENT_ABS_MAX    0x7FFF
 
 typedef struct QemuInputHandler QemuInputHandler;
 typedef struct QemuInputHandlerState QemuInputHandlerState;
@@ -54,12 +55,14 @@ void qemu_input_update_buttons(QemuConsole *src, uint32_t *button_map,
                                uint32_t button_old, uint32_t button_new);
 
 bool qemu_input_is_absolute(void);
-int qemu_input_scale_axis(int value, int size_in, int size_out);
+int qemu_input_scale_axis(int value,
+                          int min_in, int max_in,
+                          int min_out, int max_out);
 InputEvent *qemu_input_event_new_move(InputEventKind kind,
                                       InputAxis axis, int value);
 void qemu_input_queue_rel(QemuConsole *src, InputAxis axis, int value);
-void qemu_input_queue_abs(QemuConsole *src, InputAxis axis,
+void qemu_input_queue_abs(QemuConsole *src, InputAxis axis, int value,
-                          int value, int size);
+                          int min_in, int max_in);
 
 void qemu_input_check_mode_change(void);
 void qemu_add_mouse_mode_change_notifier(Notifier *notify);

ui/Makefile.objs

@@ -33,6 +33,7 @@ common-obj-y += shader.o
 common-obj-y += console-gl.o
 common-obj-y += egl-helpers.o
 common-obj-y += egl-context.o
+common-obj-y += egl-headless.o
 ifeq ($(CONFIG_GTK_GL),y)
 common-obj-$(CONFIG_GTK) += gtk-gl-area.o
 else

ui/cocoa.m

@@ -749,8 +749,8 @@ - (void) handleEvent:(NSEvent *)event
                  * clicks in the titlebar.
                  */
                 if ([self screenContainsPoint:p]) {
-                    qemu_input_queue_abs(dcl->con, INPUT_AXIS_X, p.x, screen.width);
+                    qemu_input_queue_abs(dcl->con, INPUT_AXIS_X, p.x, 0, screen.width);
-                    qemu_input_queue_abs(dcl->con, INPUT_AXIS_Y, screen.height - p.y, screen.height);
+                    qemu_input_queue_abs(dcl->con, INPUT_AXIS_Y, screen.height - p.y, 0, screen.height);
                 }
             } else {
                 qemu_input_queue_rel(dcl->con, INPUT_AXIS_X, (int)[event deltaX]);

ui/egl-context.c

@@ -7,9 +7,10 @@ QEMUGLContext qemu_egl_create_context(DisplayChangeListener *dcl,
 {
    EGLContext ctx;
    EGLint ctx_att[] = {
-      EGL_CONTEXT_CLIENT_VERSION, params->major_ver,
+       EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
-      EGL_CONTEXT_MINOR_VERSION_KHR, params->minor_ver,
+       EGL_CONTEXT_CLIENT_VERSION, params->major_ver,
-      EGL_NONE
+       EGL_CONTEXT_MINOR_VERSION_KHR, params->minor_ver,
+       EGL_NONE
    };
 
    ctx = eglCreateContext(qemu_egl_display, qemu_egl_config,

ui/egl-headless.c

@@ -0,0 +1,158 @@
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "sysemu/sysemu.h"
+#include "ui/console.h"
+#include "ui/egl-helpers.h"
+#include "ui/egl-context.h"
+
+typedef struct egl_dpy {
+    DisplayChangeListener dcl;
+    DisplaySurface *ds;
+    int width, height;
+    GLuint texture;
+    GLuint framebuffer;
+    GLuint blit_texture;
+    GLuint blit_framebuffer;
+    bool y_0_top;
+} egl_dpy;
+
+static void egl_refresh(DisplayChangeListener *dcl)
+{
+    graphic_hw_update(dcl->con);
+}
+
+static void egl_gfx_update(DisplayChangeListener *dcl,
+                           int x, int y, int w, int h)
+{
+}
+
+static void egl_gfx_switch(DisplayChangeListener *dcl,
+                           struct DisplaySurface *new_surface)
+{
+    egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
+
+    edpy->ds = new_surface;
+}
+
+static void egl_scanout_disable(DisplayChangeListener *dcl)
+{
+    egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
+
+    edpy->texture = 0;
+    /* XXX: delete framebuffers here ??? */
+}
+
+static void egl_scanout_texture(DisplayChangeListener *dcl,
+                                uint32_t backing_id,
+                                bool backing_y_0_top,
+                                uint32_t backing_width,
+                                uint32_t backing_height,
+                                uint32_t x, uint32_t y,
+                                uint32_t w, uint32_t h)
+{
+    egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
+
+    edpy->texture = backing_id;
+    edpy->y_0_top = backing_y_0_top;
+
+    /* source framebuffer */
+    if (!edpy->framebuffer) {
+        glGenFramebuffers(1, &edpy->framebuffer);
+    }
+    glBindFramebuffer(GL_FRAMEBUFFER_EXT, edpy->framebuffer);
+    glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
+                              GL_TEXTURE_2D, edpy->texture, 0);
+
+    /* dest framebuffer */
+    if (!edpy->blit_framebuffer) {
+        glGenFramebuffers(1, &edpy->blit_framebuffer);
+        glGenTextures(1, &edpy->blit_texture);
+        edpy->width = 0;
+        edpy->height = 0;
+    }
+    if (edpy->width != backing_width || edpy->height != backing_height) {
+        edpy->width   = backing_width;
+        edpy->height  = backing_height;
+        glBindTexture(GL_TEXTURE_2D, edpy->blit_texture);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
+                     edpy->width, edpy->height,
+                     0, GL_BGRA, GL_UNSIGNED_BYTE, 0);
+        glBindFramebuffer(GL_FRAMEBUFFER_EXT, edpy->blit_framebuffer);
+        glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
+                                  GL_TEXTURE_2D, edpy->blit_texture, 0);
+    }
+}
+
+static void egl_scanout_flush(DisplayChangeListener *dcl,
+                              uint32_t x, uint32_t y,
+                              uint32_t w, uint32_t h)
+{
+    egl_dpy *edpy = container_of(dcl, egl_dpy, dcl);
+    GLuint y1, y2;
+
+    if (!edpy->texture || !edpy->ds) {
+        return;
+    }
+    assert(surface_width(edpy->ds)  == edpy->width);
+    assert(surface_height(edpy->ds) == edpy->height);
+    assert(surface_format(edpy->ds) == PIXMAN_x8r8g8b8);
+
+    /* blit framebuffer, flip if needed */
+    glBindFramebuffer(GL_READ_FRAMEBUFFER, edpy->framebuffer);
+    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, edpy->blit_framebuffer);
+    glViewport(0, 0, edpy->width, edpy->height);
+    y1 = edpy->y_0_top ? edpy->height : 0;
+    y2 = edpy->y_0_top ? 0 : edpy->height;
+    glBlitFramebuffer(0, y1, edpy->width, y2,
+                      0, 0, edpy->width, edpy->height,
+                      GL_COLOR_BUFFER_BIT, GL_NEAREST);
+
+    /* read pixels to surface */
+    glBindFramebuffer(GL_READ_FRAMEBUFFER, edpy->blit_framebuffer);
+    glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
+    glReadPixels(0, 0, edpy->width, edpy->height,
+                 GL_BGRA, GL_UNSIGNED_BYTE, surface_data(edpy->ds));
+
+    /* notify about updates */
+    dpy_gfx_update(edpy->dcl.con, x, y, w, h);
+}
+
+static const DisplayChangeListenerOps egl_ops = {
+    .dpy_name                = "egl-headless",
+    .dpy_refresh             = egl_refresh,
+    .dpy_gfx_update          = egl_gfx_update,
+    .dpy_gfx_switch          = egl_gfx_switch,
+
+    .dpy_gl_ctx_create       = qemu_egl_create_context,
+    .dpy_gl_ctx_destroy      = qemu_egl_destroy_context,
+    .dpy_gl_ctx_make_current = qemu_egl_make_context_current,
+    .dpy_gl_ctx_get_current  = qemu_egl_get_current_context,
+
+    .dpy_gl_scanout_disable  = egl_scanout_disable,
+    .dpy_gl_scanout_texture  = egl_scanout_texture,
+    .dpy_gl_update           = egl_scanout_flush,
+};
+
+void egl_headless_init(void)
+{
+    QemuConsole *con;
+    egl_dpy *edpy;
+    int idx;
+
+    if (egl_rendernode_init(NULL) < 0) {
+        error_report("egl: render node init failed");
+        exit(1);
+    }
+
+    for (idx = 0;; idx++) {
+        con = qemu_console_lookup_by_index(idx);
+        if (!con || !qemu_console_is_graphic(con)) {
+            break;
+        }
+
+        edpy = g_new0(egl_dpy, 1);
+        edpy->dcl.con = con;
+        edpy->dcl.ops = &egl_ops;
+        register_displaychangelistener(&edpy->dcl);
+    }
+}

ui/egl-helpers.c

@@ -26,18 +26,6 @@ EGLConfig qemu_egl_config;
 
 /* ---------------------------------------------------------------------- */
 
-static bool egl_gles;
-static int egl_debug;
-
-#define egl_dbg(_x ...)                          \
-    do {                                         \
-        if (egl_debug) {                         \
-            fprintf(stderr, "egl: " _x);         \
-        }                                        \
-    } while (0);
-
-/* ---------------------------------------------------------------------- */
-
 #ifdef CONFIG_OPENGL_DMABUF
 
 int qemu_egl_rn_fd;
@@ -92,6 +80,7 @@ static int qemu_egl_rendernode_open(const char *rendernode)
 int egl_rendernode_init(const char *rendernode)
 {
     qemu_egl_rn_fd = -1;
+    int rc;
 
     qemu_egl_rn_fd = qemu_egl_rendernode_open(rendernode);
     if (qemu_egl_rn_fd == -1) {
@@ -105,7 +94,11 @@ int egl_rendernode_init(const char *rendernode)
         goto err;
     }
 
-    qemu_egl_init_dpy((EGLNativeDisplayType)qemu_egl_rn_gbm_dev, false, false);
+    rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev);
+    if (rc != 0) {
+        /* qemu_egl_init_dpy_mesa reports error */
+        goto err;
+    }
 
     if (!epoxy_has_egl_extension(qemu_egl_display,
                                  "EGL_KHR_surfaceless_context")) {
@@ -171,8 +164,6 @@ EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
     EGLSurface esurface;
     EGLBoolean b;
 
-    egl_dbg("eglCreateWindowSurface (x11 win id 0x%lx) ...\n",
-            (unsigned long) win);
     esurface = eglCreateWindowSurface(qemu_egl_display,
                                       qemu_egl_config,
                                       (EGLNativeWindowType)win, NULL);
@@ -220,20 +211,19 @@ EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
  * platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem
  * like mesa will be able to advertise these (even though it can do EGL 1.5).
  */
-static EGLDisplay qemu_egl_get_display(void *native)
+static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native,
+                                       EGLenum platform)
 {
     EGLDisplay dpy = EGL_NO_DISPLAY;
 
-#ifdef EGL_MESA_platform_gbm
     /* In practise any EGL 1.5 implementation would support the EXT extension */
     if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) {
         PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT =
             (void *) eglGetProcAddress("eglGetPlatformDisplayEXT");
-        if (getPlatformDisplayEXT) {
+        if (getPlatformDisplayEXT && platform != 0) {
-            dpy = getPlatformDisplayEXT(EGL_PLATFORM_GBM_MESA, native, NULL);
+            dpy = getPlatformDisplayEXT(platform, native, NULL);
         }
     }
-#endif
 
     if (dpy == EGL_NO_DISPLAY) {
         /* fallback */
@@ -242,7 +232,8 @@ static EGLDisplay qemu_egl_get_display(void *native)
     return dpy;
 }
 
-int qemu_egl_init_dpy(EGLNativeDisplayType dpy, bool gles, bool debug)
+static int qemu_egl_init_dpy(EGLNativeDisplayType dpy,
+                             EGLenum platform)
 {
     static const EGLint conf_att_gl[] = {
         EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
@@ -253,75 +244,66 @@ int qemu_egl_init_dpy(EGLNativeDisplayType dpy, bool gles, bool debug)
         EGL_ALPHA_SIZE, 0,
         EGL_NONE,
     };
-    static const EGLint conf_att_gles[] = {
-        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
-        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
-        EGL_RED_SIZE,   5,
-        EGL_GREEN_SIZE, 5,
-        EGL_BLUE_SIZE,  5,
-        EGL_ALPHA_SIZE, 0,
-        EGL_NONE,
-    };
     EGLint major, minor;
     EGLBoolean b;
     EGLint n;
 
-    if (debug) {
+    qemu_egl_display = qemu_egl_get_display(dpy, platform);
-        egl_debug = 1;
-        setenv("EGL_LOG_LEVEL", "debug", true);
-        setenv("LIBGL_DEBUG", "verbose", true);
-    }
-
-    egl_dbg("qemu_egl_get_display (dpy %p) ...\n", dpy);
-    qemu_egl_display = qemu_egl_get_display(dpy);
     if (qemu_egl_display == EGL_NO_DISPLAY) {
         error_report("egl: eglGetDisplay failed");
         return -1;
     }
 
-    egl_dbg("eglInitialize ...\n");
     b = eglInitialize(qemu_egl_display, &major, &minor);
     if (b == EGL_FALSE) {
         error_report("egl: eglInitialize failed");
         return -1;
     }
 
-    egl_dbg("eglBindAPI ...\n");
+    b = eglBindAPI(EGL_OPENGL_API);
-    b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
     if (b == EGL_FALSE) {
         error_report("egl: eglBindAPI failed");
         return -1;
     }
 
-    egl_dbg("eglChooseConfig ...\n");
+    b = eglChooseConfig(qemu_egl_display, conf_att_gl,
-    b = eglChooseConfig(qemu_egl_display,
-                        gles ? conf_att_gles : conf_att_gl,
                         &qemu_egl_config, 1, &n);
     if (b == EGL_FALSE || n != 1) {
         error_report("egl: eglChooseConfig failed");
         return -1;
     }
-
-    egl_gles = gles;
     return 0;
 }
 
+int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy)
+{
+#ifdef EGL_KHR_platform_x11
+    return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR);
+#else
+    return qemu_egl_init_dpy(dpy, 0);
+#endif
+}
+
+int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy)
+{
+#ifdef EGL_MESA_platform_gbm
+    return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA);
+#else
+    return qemu_egl_init_dpy(dpy, 0);
+#endif
+}
+
 EGLContext qemu_egl_init_ctx(void)
 {
     static const EGLint ctx_att_gl[] = {
+        EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
         EGL_NONE
     };
-    static const EGLint ctx_att_gles[] = {
-        EGL_CONTEXT_CLIENT_VERSION, 2,
-        EGL_NONE
-    };
-
     EGLContext ectx;
     EGLBoolean b;
 
-    egl_dbg("eglCreateContext ...\n");
     ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
-                            egl_gles ? ctx_att_gles : ctx_att_gl);
+                            ctx_att_gl);
     if (ectx == EGL_NO_CONTEXT) {
         error_report("egl: eglCreateContext failed");
         return NULL;

ui/gtk-egl.c

@@ -246,7 +246,7 @@ void gtk_egl_init(void)
     GdkDisplay *gdk_display = gdk_display_get_default();
     Display *x11_display = gdk_x11_display_get_xdisplay(gdk_display);
 
-    if (qemu_egl_init_dpy(x11_display, false, false) < 0) {
+    if (qemu_egl_init_dpy_x11(x11_display) < 0) {
         return;
     }
 

ui/gtk.c

@@ -912,9 +912,9 @@ static gboolean gd_motion_event(GtkWidget *widget, GdkEventMotion *motion,
             return TRUE;
         }
         qemu_input_queue_abs(vc->gfx.dcl.con, INPUT_AXIS_X, x,
-                             surface_width(vc->gfx.ds));
+                             0, surface_width(vc->gfx.ds));
         qemu_input_queue_abs(vc->gfx.dcl.con, INPUT_AXIS_Y, y,
-                             surface_height(vc->gfx.ds));
+                             0, surface_height(vc->gfx.ds));
         qemu_input_event_sync();
     } else if (s->last_set && s->ptr_owner == vc) {
         qemu_input_queue_rel(vc->gfx.dcl.con, INPUT_AXIS_X, x - s->last_x);

ui/input-linux.c

@@ -169,6 +169,10 @@ struct InputLinux {
     bool        has_abs_x;
     int         num_keys;
     int         num_btns;
+    int         abs_x_min;
+    int         abs_x_max;
+    int         abs_y_min;
+    int         abs_y_max;
     struct input_event event;
     int         read_offset;
 
@@ -314,6 +318,18 @@ static void input_linux_handle_mouse(InputLinux *il, struct input_event *event)
             break;
         }
         break;
+    case EV_ABS:
+        switch (event->code) {
+        case ABS_X:
+            qemu_input_queue_abs(NULL, INPUT_AXIS_X, event->value,
+                                 il->abs_x_min, il->abs_x_max);
+            break;
+        case ABS_Y:
+            qemu_input_queue_abs(NULL, INPUT_AXIS_Y, event->value,
+                                 il->abs_y_min, il->abs_y_max);
+            break;
+        }
+        break;
     case EV_SYN:
         qemu_input_event_sync();
         if (il->wheel != 0) {
@@ -351,7 +367,7 @@ static void input_linux_event(void *opaque)
         if (il->num_keys) {
             input_linux_handle_keyboard(il, &il->event);
         }
-        if (il->has_rel_x && il->num_btns) {
+        if ((il->has_rel_x || il->has_abs_x) && il->num_btns) {
             input_linux_handle_mouse(il, &il->event);
         }
     }
@@ -364,6 +380,7 @@ static void input_linux_complete(UserCreatable *uc, Error **errp)
     uint8_t keymap[KEY_CNT / 8], keystate[KEY_CNT / 8];
     unsigned int i;
     int rc, ver;
+    struct input_absinfo absinfo;
 
     if (!il->evdev) {
         error_setg(errp, "no input device specified");
@@ -402,6 +419,12 @@ static void input_linux_complete(UserCreatable *uc, Error **errp)
         rc = ioctl(il->fd, EVIOCGBIT(EV_ABS, sizeof(absmap)), &absmap);
         if (absmap & (1 << ABS_X)) {
             il->has_abs_x = true;
+            rc = ioctl(il->fd, EVIOCGABS(ABS_X), &absinfo);
+            il->abs_x_min = absinfo.minimum;
+            il->abs_x_max = absinfo.maximum;
+            rc = ioctl(il->fd, EVIOCGABS(ABS_Y), &absinfo);
+            il->abs_y_min = absinfo.minimum;
+            il->abs_y_max = absinfo.maximum;
         }
     }
 

ui/input.c

@@ -166,6 +166,11 @@ void qmp_input_send_event(bool has_device, const char *device,
     qemu_input_event_sync();
 }
 
+static int qemu_input_transform_invert_abs_value(int value)
+{
+  return (int64_t)INPUT_EVENT_ABS_MAX - value + INPUT_EVENT_ABS_MIN;
+}
+
 static void qemu_input_transform_abs_rotate(InputEvent *evt)
 {
     InputMoveEvent *move = evt->u.abs.data;
@@ -175,16 +180,16 @@ static void qemu_input_transform_abs_rotate(InputEvent *evt)
             move->axis = INPUT_AXIS_Y;
         } else if (move->axis == INPUT_AXIS_Y) {
             move->axis = INPUT_AXIS_X;
-            move->value = INPUT_EVENT_ABS_SIZE - 1 - move->value;
+            move->value = qemu_input_transform_invert_abs_value(move->value);
         }
         break;
     case 180:
-        move->value = INPUT_EVENT_ABS_SIZE - 1 - move->value;
+        move->value = qemu_input_transform_invert_abs_value(move->value);
         break;
     case 270:
         if (move->axis == INPUT_AXIS_X) {
             move->axis = INPUT_AXIS_Y;
-            move->value = INPUT_EVENT_ABS_SIZE - 1 - move->value;
+            move->value = qemu_input_transform_invert_abs_value(move->value);
         } else if (move->axis == INPUT_AXIS_Y) {
             move->axis = INPUT_AXIS_X;
         }
@@ -467,12 +472,17 @@ bool qemu_input_is_absolute(void)
     return (s != NULL) && (s->handler->mask & INPUT_EVENT_MASK_ABS);
 }
 
-int qemu_input_scale_axis(int value, int size_in, int size_out)
+int qemu_input_scale_axis(int value,
+                          int min_in, int max_in,
+                          int min_out, int max_out)
 {
-    if (size_in < 2) {
+    int64_t range_in = (int64_t)max_in - min_in;
-        return size_out / 2;
+    int64_t range_out = (int64_t)max_out - min_out;
+
+    if (range_in < 1) {
+        return min_out + range_out / 2;
     }
-    return (int64_t)value * (size_out - 1) / (size_in - 1);
+    return ((int64_t)value - min_in) * range_out / range_in + min_out;
 }
 
 InputEvent *qemu_input_event_new_move(InputEventKind kind,
@@ -496,10 +506,13 @@ void qemu_input_queue_rel(QemuConsole *src, InputAxis axis, int value)
     qapi_free_InputEvent(evt);
 }
 
-void qemu_input_queue_abs(QemuConsole *src, InputAxis axis, int value, int size)
+void qemu_input_queue_abs(QemuConsole *src, InputAxis axis, int value,
+                          int min_in, int max_in)
 {
     InputEvent *evt;
-    int scaled = qemu_input_scale_axis(value, size, INPUT_EVENT_ABS_SIZE);
+    int scaled = qemu_input_scale_axis(value, min_in, max_in,
+                                       INPUT_EVENT_ABS_MIN,
+                                       INPUT_EVENT_ABS_MAX);
     evt = qemu_input_event_new_move(INPUT_EVENT_KIND_ABS, axis, scaled);
     qemu_input_event_send(src, evt);
     qapi_free_InputEvent(evt);

ui/sdl.c

@@ -490,9 +490,9 @@ static void sdl_send_mouse_event(int dx, int dy, int x, int y, int state)
 
     if (qemu_input_is_absolute()) {
         qemu_input_queue_abs(dcl->con, INPUT_AXIS_X, x,
-                             real_screen->w);
+                             0, real_screen->w);
         qemu_input_queue_abs(dcl->con, INPUT_AXIS_Y, y,
-                             real_screen->h);
+                             0, real_screen->h);
     } else {
         if (guest_cursor) {
             x -= guest_x;

ui/sdl2.c

@@ -298,8 +298,8 @@ static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
                 }
             }
         }
-        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
+        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, 0, max_w);
-        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
+        qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, 0, max_h);
     } else {
         if (guest_cursor) {
             x -= guest_x;

ui/spice-input.c

@@ -172,8 +172,8 @@ static void tablet_position(SpiceTabletInstance* sin, int x, int y,
     QemuSpicePointer *pointer = container_of(sin, QemuSpicePointer, tablet);
 
     spice_update_buttons(pointer, 0, buttons_state);
-    qemu_input_queue_abs(NULL, INPUT_AXIS_X, x, pointer->width);
+    qemu_input_queue_abs(NULL, INPUT_AXIS_X, x, 0, pointer->width);
-    qemu_input_queue_abs(NULL, INPUT_AXIS_Y, y, pointer->height);
+    qemu_input_queue_abs(NULL, INPUT_AXIS_Y, y, 0, pointer->height);
     qemu_input_event_sync();
 }
 

ui/vnc-enc-zrle.c

@@ -163,7 +163,6 @@ static void zrle_choose_palette_rle(VncState *vs, int w, int h,
             if (packed_bytes < estimated_bytes) {
                 *use_rle = false;
                 *use_palette = true;
-                estimated_bytes = packed_bytes;
             }
         }
     }

ui/vnc.c

@@ -1556,8 +1556,8 @@ static void pointer_event(VncState *vs, int button_mask, int x, int y)
     }
 
     if (vs->absolute) {
-        qemu_input_queue_abs(con, INPUT_AXIS_X, x, width);
+        qemu_input_queue_abs(con, INPUT_AXIS_X, x, 0, width);
-        qemu_input_queue_abs(con, INPUT_AXIS_Y, y, height);
+        qemu_input_queue_abs(con, INPUT_AXIS_Y, y, 0, height);
     } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) {
         qemu_input_queue_rel(con, INPUT_AXIS_X, x - 0x7FFF);
         qemu_input_queue_rel(con, INPUT_AXIS_Y, y - 0x7FFF);
@@ -2061,15 +2061,15 @@ static void set_pixel_format(VncState *vs, int bits_per_pixel,
     }
 
     vs->client_pf.rmax = red_max ? red_max : 0xFF;
-    vs->client_pf.rbits = hweight_long(red_max);
+    vs->client_pf.rbits = ctpopl(red_max);
     vs->client_pf.rshift = red_shift;
     vs->client_pf.rmask = red_max << red_shift;
     vs->client_pf.gmax = green_max ? green_max : 0xFF;
-    vs->client_pf.gbits = hweight_long(green_max);
+    vs->client_pf.gbits = ctpopl(green_max);
     vs->client_pf.gshift = green_shift;
     vs->client_pf.gmask = green_max << green_shift;
     vs->client_pf.bmax = blue_max ? blue_max : 0xFF;
-    vs->client_pf.bbits = hweight_long(blue_max);
+    vs->client_pf.bbits = ctpopl(blue_max);
     vs->client_pf.bshift = blue_shift;
     vs->client_pf.bmask = blue_max << blue_shift;
     vs->client_pf.bits_per_pixel = bits_per_pixel;

vl.c

@@ -2050,6 +2050,7 @@ typedef enum DisplayType {
     DT_SDL,
     DT_COCOA,
     DT_GTK,
+    DT_EGL,
     DT_NONE,
 } DisplayType;
 
@@ -2127,6 +2128,15 @@ static DisplayType select_display(const char *p)
             error_report("VNC requires a display argument vnc=<display>");
             exit(1);
         }
+    } else if (strstart(p, "egl-headless", &opts)) {
+#ifdef CONFIG_OPENGL
+        request_opengl = 1;
+        display_opengl = 1;
+        display = DT_EGL;
+#else
+        fprintf(stderr, "egl support is disabled\n");
+        exit(1);
+#endif
     } else if (strstart(p, "curses", &opts)) {
 #ifdef CONFIG_CURSES
         display = DT_CURSES;
@@ -4658,6 +4668,12 @@ int main(int argc, char **argv, char **envp)
         qemu_spice_display_init();
     }
 
+#ifdef CONFIG_OPENGL
+    if (display_type == DT_EGL) {
+        egl_headless_init();
+    }
+#endif
+
     if (foreach_device_config(DEV_GDB, gdbserver_start) < 0) {
         exit(1);
     }