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ui/gtk-egl: blitting partial guest fb to the proper scanout surface

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eb_fb_blit should be able to blit partial image of guest display (blob res)
in case multiple displays are configured for the guest and they are set as extended-
desktop mode.

v2: egl_fb includes dmabuf info then make egl_fb_blit position and size
    parameters programmed in dmabuf structure (previously position/size
    parameters were given to egl_fb_blit separately)
    (Vivek Kasireddy)

    changed the commit message as there is no interface change to egl_fb_blit

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Vivek Kasireddy <vivek.kasireddy@intel.com>
Signed-off-by: Dongwon Kim <dongwon.kim@intel.com>
Message-Id: <20211104065153.28897-6-dongwon.kim@intel.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Dongwon Kim 2021-11-03 23:51:53 -07:00 committed by Gerd Hoffmann
parent 7cf87257f7
commit 1350ff156b
1 changed files with 21 additions and 4 deletions
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25
ui/egl-helpers.c
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@ -90,14 +90,31 @@ void egl_fb_setup_new_tex(egl_fb *fb, int width, int height)
void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip)
{
GLuint y1, y2;
GLuint x1 = 0;
GLuint y1 = 0;
GLuint x2, y2;
GLuint w = src->width;
GLuint h = src->height;
glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer);
glViewport(0, 0, dst->width, dst->height);
y1 = flip ? src->height : 0;
y2 = flip ? 0 : src->height;
glBlitFramebuffer(0, y1, src->width, y2,
if (src->dmabuf) {
x1 = src->dmabuf->x;
y1 = src->dmabuf->y;
w = src->dmabuf->scanout_width;
h = src->dmabuf->scanout_height;
}
w = (x1 + w) > src->width ? src->width - x1 : w;
h = (y1 + h) > src->height ? src->height - y1 : h;
y2 = flip ? y1 : h + y1;
y1 = flip ? h + y1 : y1;
x2 = x1 + w;
glBlitFramebuffer(x1, y1, x2, y2,
0, 0, dst->width, dst->height,
GL_COLOR_BUFFER_BIT, GL_LINEAR);
}