reading and apply gamma ramps

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

1 files changed, 39 insertions, 1 deletions

diff --git a/src/drmgamma.h b/src/drmgamma.h
index efc7ec2..e82159d 100644
--- a/src/drmgamma.h
+++ b/src/drmgamma.h
@@ -61,6 +61,7 @@ typedef struct drm_card
   
 } drm_card_t;
 
+
 /**
  * CRT controller information
  */
@@ -94,11 +95,32 @@ typedef struct drm_crtc
   /**
    * The CRT's EDID, hexadecimally encoded
    */
-  char* edid;
+  char* restrict edid;
+  
+  /**
+   * The number of stops on the gamma ramps
+   */
+  size_t gamma_stops;
+  
+  /**
+   * The gamma ramp for the red channel
+   */
+  uint16_t* restrict red;
+  
+  /**
+   * The gamma ramp for the green channel
+   */
+  uint16_t* restrict green;
+  
+  /**
+   * The gamma ramp for the blue channel
+   */
+  uint16_t* restrict blue;
   
 } drm_crtc_t;
 
 
+
 /**
  * Figure out how many graphics cards there are on the system
  * 
@@ -139,6 +161,22 @@ int drm_crtc_open(size_t index, drm_card_t* restrict card, drm_crtc_t* restrict
  */
 void drm_crtc_close(drm_crtc_t* restrict crtc);
 
+/**
+ * Read the gamma ramps for a CRT controller
+ * 
+ * @param   crtc  CRT controller information
+ * @return        Zero on success, -1 on error 
+ */
+int drm_get_gamma(drm_crtc_t* restrict crtc);
+
+/**
+ * Apply gamma ramps for a CRT controller
+ * 
+ * @param   crtc  CRT controller information
+ * @return        Zero on success, -1 on error
+ */
+int drm_set_gamma(drm_crtc_t* restrict crtc);
+
 
 #endif