ecore-drm2: Add API function to allow setting gamma of a given output

Small patch to add an API function which will allow setting the gamma
level of a given output.

@feature

Signed-off-by: Chris Michael <cp.michael@samsung.com>

2 files changed, 30 insertions, 1 deletions

diff --git a/src/lib/ecore_drm2/Ecore_Drm2.h b/src/lib/ecore_drm2/Ecore_Drm2.h
index 708e31aca4..863a9c6df9 100644
--- a/src/lib/ecore_drm2/Ecore_Drm2.h
+++ b/src/lib/ecore_drm2/Ecore_Drm2.h
@@ -705,6 +705,22 @@ EAPI void ecore_drm2_output_resolution_get(Ecore_Drm2_Output *output, int *w, in
 EAPI Eina_Bool ecore_drm2_output_possible_crtc_get(Ecore_Drm2_Output *output, unsigned int crtc);
 
 /**
+ * Set the gamma level of an Ecore_Drm_Output
+ *
+ * This function will set the gamma of an Ecore_Drm2_Output
+ *
+ * @param output The Ecore_Drm2_Output to set the gamma level on
+ * @param size The gamma table size to set
+ * @param red The amount to scale the red channel
+ * @param green The amount to scale the green channel
+ * @param blue The amount to scale the blue channel
+ *
+ * @ingroup Ecore_Drm2_Output_Group
+ * @since 1.19
+ */
+EAPI void ecore_drm2_output_gamma_set(Ecore_Drm2_Output *output, uint16_t size, uint16_t *red, uint16_t *green, uint16_t *blue);
+
+/**
  * @defgroup Ecore_Drm2_Fb_Group Drm framebuffer functions
  *
  * Functions that deal with setup of framebuffers
diff --git a/src/lib/ecore_drm2/ecore_drm2_outputs.c b/src/lib/ecore_drm2/ecore_drm2_outputs.c
index bd0703dd45..c9f7dde024 100644
--- a/src/lib/ecore_drm2/ecore_drm2_outputs.c
+++ b/src/lib/ecore_drm2/ecore_drm2_outputs.c
@@ -754,7 +754,7 @@ _output_create(Ecore_Drm2_Device *dev, const drmModeRes *res, const drmModeConne
 
    _output_backlight_init(output, conn->connector_type);
 
-   /* TODO: gamma */
+   output->gamma = output->ocrtc->gamma_size;
 
    _output_modes_create(dev, output, conn);
 
@@ -1501,3 +1501,16 @@ ecore_drm2_output_release_handler_set(Ecore_Drm2_Output *o, Ecore_Drm2_Release_H
    o->release_data = data;
    o->release_cb = cb;
 }
+
+EAPI void
+ecore_drm2_output_gamma_set(Ecore_Drm2_Output *output, uint16_t size, uint16_t *red, uint16_t *green, uint16_t *blue)
+{
+   EINA_SAFETY_ON_NULL_RETURN(output);
+   EINA_SAFETY_ON_TRUE_RETURN(output->fd < 0);
+
+   if (output->gamma != size) return;
+
+   if (sym_drmModeCrtcSetGamma(output->fd, output->crtc_id, size,
+                               red, green, blue) < 0)
+     ERR("Failed to set gamma for Output %s: %m", output->name);
+}