virgl,egl: add check for EGL_KHR_gl_colorspace

This is needed to properly support EXT_sRGB_write_control

v2: Make return value of virgl_has_egl_khr_gl_colorspace
    a bool (Gurchetan)

Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>

src/virgl_egl.h

@@ -35,6 +35,7 @@ void virgl_egl_destroy_context(struct virgl_egl *ve, virgl_renderer_gl_context v
 int virgl_egl_make_context_current(struct virgl_egl *ve, virgl_renderer_gl_context virglctx);
 virgl_renderer_gl_context virgl_egl_get_current_context(struct virgl_egl *ve);
 
+bool virgl_has_egl_khr_gl_colorspace(struct virgl_egl *ve);
 int virgl_egl_get_fourcc_for_texture(struct virgl_egl *ve, uint32_t tex_id, uint32_t format, int *fourcc);
 int virgl_egl_get_fd_for_texture(struct virgl_egl *ve, uint32_t tex_id, int *fd);
 int virgl_egl_get_fd_for_texture2(struct virgl_egl *ve, uint32_t tex_id, int *fd, int *stride, int *offset);

src/virgl_egl_context.c

@@ -54,6 +54,7 @@ struct virgl_egl {
    EGLContext egl_ctx;
    bool have_mesa_drm_image;
    bool have_mesa_dma_buf_img_export;
+   bool have_egl_khr_gl_colorspace;
 };
 
 static int egl_rendernode_open(void)
@@ -240,6 +241,9 @@ struct virgl_egl *virgl_egl_init(int fd, bool surfaceless, bool gles)
       goto fail;
    }
 
+   d->have_egl_khr_gl_colorspace =
+         virgl_egl_has_extension_in_string(extension_list, "EGL_KHR_gl_colorspace");
+
    if (gles)
       api = EGL_OPENGL_ES_API;
    else
@@ -417,6 +421,11 @@ int virgl_egl_get_fd_for_texture(struct virgl_egl *ve, uint32_t tex_id, int *fd)
    return ret;
 }
 
+bool virgl_has_egl_khr_gl_colorspace(struct virgl_egl *ve)
+{
+   return ve->have_egl_khr_gl_colorspace;
+}
+
 uint32_t virgl_egl_get_gbm_format(uint32_t format)
 {
    switch (format) {

src/virglrenderer.c

@@ -201,6 +201,13 @@ int virgl_renderer_resource_get_info(int res_handle,
    return ret;
 }
 
+int virgl_has_gl_colorspace(void)
+{
+   return use_context == CONTEXT_GLX ||
+         (use_context == CONTEXT_EGL &&
+          virgl_has_egl_khr_gl_colorspace(egl_info));
+}
+
 void virgl_renderer_get_cap_set(uint32_t cap_set, uint32_t *max_ver,
                                 uint32_t *max_size)
 {

src/vrend_renderer.h

@@ -418,6 +418,8 @@ unsigned vrend_context_has_debug_flag(struct vrend_context *ctx,
 unsigned vrend_renderer_query_multisample_caps(unsigned max_samples,
                                                struct virgl_caps_v2 *caps);
 
+int virgl_has_gl_colorspace(void);
+
 struct gl_version {
    uint32_t major;
    uint32_t minor;