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qemu/ui/gtk-gl-area.c
Marc-André Lureau bf41ab6190 ui: add optional d3d texture pointer to scanout texture 
The following patch will get the underlying D3D11 Texture2D from the
virgl renderer scanout. Pass it along to the texture scanout callbacks
as a priliminary step, to simplify review.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230606115658.677673-20-marcandre.lureau@redhat.com>
2023-06-27 17:08:56 +02:00

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/*
* GTK UI -- glarea opengl code.
*
* Requires 3.16+ (GtkGLArea widget).
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/main-loop.h"
#include "trace.h"
#include "ui/console.h"
#include "ui/gtk.h"
#include "ui/egl-helpers.h"
#include "sysemu/sysemu.h"
static void gtk_gl_area_set_scanout_mode(VirtualConsole *vc, bool scanout)
{
if (vc->gfx.scanout_mode == scanout) {
return;
}
vc->gfx.scanout_mode = scanout;
if (!vc->gfx.scanout_mode) {
egl_fb_destroy(&vc->gfx.guest_fb);
if (vc->gfx.surface) {
surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
}
}
/** DisplayState Callbacks (opengl version) **/
void gd_gl_area_draw(VirtualConsole *vc)
{
#ifdef CONFIG_GBM
QemuDmaBuf *dmabuf = vc->gfx.guest_fb.dmabuf;
#endif
int ww, wh, ws, y1, y2;
if (!vc->gfx.gls) {
return;
}
gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
ws = gdk_window_get_scale_factor(gtk_widget_get_window(vc->gfx.drawing_area));
ww = gtk_widget_get_allocated_width(vc->gfx.drawing_area) * ws;
wh = gtk_widget_get_allocated_height(vc->gfx.drawing_area) * ws;
if (vc->gfx.scanout_mode) {
if (!vc->gfx.guest_fb.framebuffer) {
return;
}
#ifdef CONFIG_GBM
if (dmabuf) {
if (!dmabuf->draw_submitted) {
return;
} else {
dmabuf->draw_submitted = false;
}
}
#endif
glBindFramebuffer(GL_READ_FRAMEBUFFER, vc->gfx.guest_fb.framebuffer);
/* GtkGLArea sets GL_DRAW_FRAMEBUFFER for us */
glViewport(0, 0, ww, wh);
y1 = vc->gfx.y0_top ? 0 : vc->gfx.h;
y2 = vc->gfx.y0_top ? vc->gfx.h : 0;
glBlitFramebuffer(0, y1, vc->gfx.w, y2,
0, 0, ww, wh,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
#ifdef CONFIG_GBM
if (dmabuf) {
egl_dmabuf_create_sync(dmabuf);
}
#endif
glFlush();
#ifdef CONFIG_GBM
if (dmabuf) {
egl_dmabuf_create_fence(dmabuf);
if (dmabuf->fence_fd > 0) {
qemu_set_fd_handler(dmabuf->fence_fd, gd_hw_gl_flushed, NULL, vc);
return;
}
graphic_hw_gl_block(vc->gfx.dcl.con, false);
}
#endif
} else {
if (!vc->gfx.ds) {
return;
}
gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
surface_gl_setup_viewport(vc->gfx.gls, vc->gfx.ds, ww, wh);
surface_gl_render_texture(vc->gfx.gls, vc->gfx.ds);
}
}
void gd_gl_area_update(DisplayChangeListener *dcl,
int x, int y, int w, int h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
if (!vc->gfx.gls || !vc->gfx.ds) {
return;
}
gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
surface_gl_update_texture(vc->gfx.gls, vc->gfx.ds, x, y, w, h);
vc->gfx.glupdates++;
}
void gd_gl_area_refresh(DisplayChangeListener *dcl)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
gd_update_monitor_refresh_rate(vc, vc->window ? vc->window : vc->gfx.drawing_area);
if (!vc->gfx.gls) {
if (!gtk_widget_get_realized(vc->gfx.drawing_area)) {
return;
}
gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
vc->gfx.gls = qemu_gl_init_shader();
if (vc->gfx.ds) {
surface_gl_create_texture(vc->gfx.gls, vc->gfx.ds);
}
}
graphic_hw_update(dcl->con);
if (vc->gfx.glupdates) {
vc->gfx.glupdates = 0;
gtk_gl_area_set_scanout_mode(vc, false);
gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
}
}
void gd_gl_area_switch(DisplayChangeListener *dcl,
DisplaySurface *surface)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
bool resized = true;
trace_gd_switch(vc->label, surface_width(surface), surface_height(surface));
if (vc->gfx.ds &&
surface_width(vc->gfx.ds) == surface_width(surface) &&
surface_height(vc->gfx.ds) == surface_height(surface)) {
resized = false;
}
if (vc->gfx.gls) {
gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
surface_gl_destroy_texture(vc->gfx.gls, vc->gfx.ds);
surface_gl_create_texture(vc->gfx.gls, surface);
}
vc->gfx.ds = surface;
if (resized) {
gd_update_windowsize(vc);
}
}
static int gd_cmp_gl_context_version(int major, int minor, QEMUGLParams *params)
{
if (major > params->major_ver) {
return 1;
}
if (major < params->major_ver) {
return -1;
}
if (minor > params->minor_ver) {
return 1;
}
if (minor < params->minor_ver) {
return -1;
}
return 0;
}
QEMUGLContext gd_gl_area_create_context(DisplayGLCtx *dgc,
QEMUGLParams *params)
{
VirtualConsole *vc = container_of(dgc, VirtualConsole, gfx.dgc);
GdkWindow *window;
GdkGLContext *ctx;
GError *err = NULL;
int major, minor;
window = gtk_widget_get_window(vc->gfx.drawing_area);
ctx = gdk_window_create_gl_context(window, &err);
if (err) {
g_printerr("Create gdk gl context failed: %s\n", err->message);
g_error_free(err);
return NULL;
}
gdk_gl_context_set_required_version(ctx,
params->major_ver,
params->minor_ver);
gdk_gl_context_realize(ctx, &err);
if (err) {
g_printerr("Realize gdk gl context failed: %s\n", err->message);
g_error_free(err);
g_clear_object(&ctx);
return NULL;
}
gdk_gl_context_make_current(ctx);
gdk_gl_context_get_version(ctx, &major, &minor);
gdk_gl_context_clear_current();
gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
if (gd_cmp_gl_context_version(major, minor, params) == -1) {
/* created ctx version < requested version */
g_clear_object(&ctx);
}
trace_gd_gl_area_create_context(ctx, params->major_ver, params->minor_ver);
return ctx;
}
void gd_gl_area_destroy_context(DisplayGLCtx *dgc, QEMUGLContext ctx)
{
GdkGLContext *current_ctx = gdk_gl_context_get_current();
trace_gd_gl_area_destroy_context(ctx, current_ctx);
if (ctx == current_ctx) {
gdk_gl_context_clear_current();
}
g_clear_object(&ctx);
}
void gd_gl_area_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,
void *d3d_tex2d)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
vc->gfx.x = x;
vc->gfx.y = y;
vc->gfx.w = w;
vc->gfx.h = h;
vc->gfx.y0_top = backing_y_0_top;
gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
if (backing_id == 0 || vc->gfx.w == 0 || vc->gfx.h == 0) {
gtk_gl_area_set_scanout_mode(vc, false);
return;
}
gtk_gl_area_set_scanout_mode(vc, true);
egl_fb_setup_for_tex(&vc->gfx.guest_fb, backing_width, backing_height,
backing_id, false);
}
void gd_gl_area_scanout_disable(DisplayChangeListener *dcl)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
gtk_gl_area_set_scanout_mode(vc, false);
}
void gd_gl_area_scanout_flush(DisplayChangeListener *dcl,
uint32_t x, uint32_t y, uint32_t w, uint32_t h)
{
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
if (vc->gfx.guest_fb.dmabuf && !vc->gfx.guest_fb.dmabuf->draw_submitted) {
graphic_hw_gl_block(vc->gfx.dcl.con, true);
vc->gfx.guest_fb.dmabuf->draw_submitted = true;
}
gtk_gl_area_queue_render(GTK_GL_AREA(vc->gfx.drawing_area));
}
void gd_gl_area_scanout_dmabuf(DisplayChangeListener *dcl,
QemuDmaBuf *dmabuf)
{
#ifdef CONFIG_GBM
VirtualConsole *vc = container_of(dcl, VirtualConsole, gfx.dcl);
gtk_gl_area_make_current(GTK_GL_AREA(vc->gfx.drawing_area));
egl_dmabuf_import_texture(dmabuf);
if (!dmabuf->texture) {
return;
}
gd_gl_area_scanout_texture(dcl, dmabuf->texture,
dmabuf->y0_top, dmabuf->width, dmabuf->height,
dmabuf->x, dmabuf->y, dmabuf->scanout_width,
dmabuf->scanout_height, NULL);
if (dmabuf->allow_fences) {
vc->gfx.guest_fb.dmabuf = dmabuf;
}
#endif
}
void gtk_gl_area_init(void)
{
display_opengl = 1;
}
int gd_gl_area_make_current(DisplayGLCtx *dgc,
QEMUGLContext ctx)
{
gdk_gl_context_make_current(ctx);
return 0;
}
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