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lib: Split the GTT mapping out of get_cairo_surface()

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This is preparation work for when we need a different way to get a
linear buffer we can use with cairo.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
This commit is contained in:
Damien Lespiau 2014-06-23 16:41:43 +01:00
parent f5959af8a5
commit 4aadbc817b
1 changed files with 15 additions and 11 deletions
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16
lib/igt_fb.c
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@ -518,24 +518,28 @@ static cairo_format_t drm_format_to_cairo(uint32_t drm_format)
igt_fail(101);
}
static void __destroy_cairo_surface(void *arg)
static void destroy_cairo_surface__gtt(void *arg)
{
struct igt_fb *fb = arg;
munmap(cairo_image_surface_get_data(fb->cairo_surface), fb->size);
}
static cairo_surface_t *get_cairo_surface(int fd, struct igt_fb *fb)
static void create_cairo_surface__gtt(int fd, struct igt_fb *fb)
{
if (fb->cairo_surface == NULL) {
fb->cairo_surface =
cairo_image_surface_create_for_data(gem_mmap(fd, fb->gem_handle, fb->size, PROT_READ | PROT_WRITE),
drm_format_to_cairo(fb->drm_format),
fb->width, fb->height, fb->stride);
cairo_surface_set_user_data(fb->cairo_surface,
(cairo_user_data_key_t *)get_cairo_surface,
fb, __destroy_cairo_surface);
}
(cairo_user_data_key_t *)create_cairo_surface__gtt,
fb, destroy_cairo_surface__gtt);
}
static cairo_surface_t *get_cairo_surface(int fd, struct igt_fb *fb)
{
if (fb->cairo_surface == NULL)
create_cairo_surface__gtt(fd, fb);
gem_set_domain(fd, fb->gem_handle,
I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU);