wayland: set and get gamma

Signed-off-by: Mattias Andrée <maandree@operamail.com>

2 files changed, 34 insertions, 3 deletions

diff --git a/src/lib/gamma-wayland.c b/src/lib/gamma-wayland.c
index be41c7a..e3e68e7 100644
--- a/src/lib/gamma-wayland.c
+++ b/src/lib/gamma-wayland.c
@@ -582,7 +582,9 @@ int libgamma_wayland_get_crtc_information(libgamma_crtc_information_t* restrict
 int libgamma_wayland_crtc_get_gamma_ramps16(libgamma_crtc_state_t* restrict this,
 					    libgamma_gamma_ramps16_t* restrict ramps)
 {
-  return 0; (void) this, (void) ramps; /* TODO */
+  (void) this;
+  (void) ramps;
+  return errno = ENOTSUP, LIBGAMMA_ERRNO_SET;
 }
 
 
@@ -597,6 +599,35 @@ int libgamma_wayland_crtc_get_gamma_ramps16(libgamma_crtc_state_t* restrict this
 int libgamma_wayland_crtc_set_gamma_ramps16(libgamma_crtc_state_t* restrict this,
 					    libgamma_gamma_ramps16_t ramps)
 {
-  return 0; (void) this, (void) ramps; /* TODO */
+  libgamma_wayland_site_data_t* site = this->partition->site->data;
+  libgamma_wayland_crtc_data_t* crtc = this->data;
+  struct wl_array red;
+  struct wl_array green;
+  struct wl_array blue;
+  
+  /* TODO Verify that gamma can be set. */
+  
+#ifdef DEBUG
+  /* Gamma ramp sizes are identical but not fixed. */
+  if ((ramps.red_size != ramps.green_size) ||
+      (ramps.red_size != ramps.blue_size))
+    return LIBGAMMA_MIXED_GAMMA_RAMP_SIZE;
+#endif
+  
+  /* Translate gamma ramps to Wayland structure. */
+  red  .size = red  .alloc = ramps.  red_size * sizeof(uint16_t);
+  green.size = green.alloc = ramps.green_size * sizeof(uint16_t);
+  blue .size = blue .alloc = ramps. blue_size * sizeof(uint16_t);
+  red  .data = ramps.red;
+  green.data = ramps.green;
+  blue .data = ramps.blue;
+  
+  /* Apply gamma ramps. */
+  gamma_control_set_gamma(crtc->gamma_control, &red, &green, &blue);
+  wl_display_flush(site->display);
+  
+  /* TODO Check for errors. */
+  
+  return 0;
 }
 
diff --git a/src/lib/gamma-wayland.h b/src/lib/gamma-wayland.h
index b8435b1..3ae6ade 100644
--- a/src/lib/gamma-wayland.h
+++ b/src/lib/gamma-wayland.h
@@ -145,7 +145,7 @@ int libgamma_wayland_get_crtc_information(libgamma_crtc_information_t* restrict
  *                 error identifier provided by this library.
  */
 int libgamma_wayland_crtc_get_gamma_ramps16(libgamma_crtc_state_t* restrict this,
-					    libgamma_gamma_ramps16_t* restrict ramps);
+					    libgamma_gamma_ramps16_t* restrict ramps) __attribute__((const));
 
 /**
  * Set the gamma ramps for a CRTC, 16-bit gamma-depth version.