Commit 0eb50c27 authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

egl-helpers: add egl_texture_blit and egl_texture_blend 



egl_texture_blit() blits a texture, simliar to egl_fb_blit() but by
rendering the texture to the screen instead of using a framebuffer blit.

egl_texture_blend() renders a texture with alpha blending, will be used
to render the cursor to the screen.

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Message-id: 20171010135453.6704-6-kraxel@redhat.com
parent 86c0522c

include/ui/egl-helpers.h

+4 −0
Original line number Diff line number Diff line
@@ -24,6 +24,10 @@ 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);

void egl_fb_read(void *dst, egl_fb *src);



void egl_texture_blit(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip);

void egl_texture_blend(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip,

                       int x, int y);



#ifdef CONFIG_OPENGL_DMABUF



extern int qemu_egl_rn_fd;

ui/egl-helpers.c

+27 −0
Original line number Diff line number Diff line
@@ -111,6 +111,33 @@ void egl_fb_read(void *dst, egl_fb *src) 
                 GL_BGRA, GL_UNSIGNED_BYTE, dst);

}



void egl_texture_blit(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip)

{

    glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);

    glViewport(0, 0, dst->width, dst->height);

    glEnable(GL_TEXTURE_2D);

    glBindTexture(GL_TEXTURE_2D, src->texture);

    qemu_gl_run_texture_blit(gls, flip);

}



void egl_texture_blend(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip,

                       int x, int y)

{

    glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);

    if (flip) {

        glViewport(x, y, src->width, src->height);

    } else {

        glViewport(x, dst->height - src->height - y,

                   src->width, src->height);

    }

    glEnable(GL_TEXTURE_2D);

    glBindTexture(GL_TEXTURE_2D, src->texture);

    glEnable(GL_BLEND);

    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    qemu_gl_run_texture_blit(gls, flip);

    glDisable(GL_BLEND);

}



/* ---------------------------------------------------------------------- */



#ifdef CONFIG_OPENGL_DMABUF