mesa: Track enabled lights in a bitmask

This enables some optimizations afterwards.

Reviewed-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Mathias Fröhlich <Mathias.Froehlich@web.de>

diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index 1d674bf..bc59280 100644 (file)
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -402,10 +402,12 @@ _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
          FLUSH_VERTICES(ctx, _NEW_LIGHT);
          ctx->Light.Light[cap-GL_LIGHT0].Enabled = state;
          if (state) {
+            ctx->Light._EnabledLights |= 1u << (cap - GL_LIGHT0);
             insert_at_tail(&ctx->Light.EnabledList,
                            &ctx->Light.Light[cap-GL_LIGHT0]);
          }
          else {
+            ctx->Light._EnabledLights &= ~(1u << (cap - GL_LIGHT0));
             remove_from_list(&ctx->Light.Light[cap-GL_LIGHT0]);
          }
          break;

diff --git a/src/mesa/main/light.c b/src/mesa/main/light.c
index 4a8dee3..a52efdb 100644 (file)
--- a/src/mesa/main/light.c
+++ b/src/mesa/main/light.c
@@ -1171,6 +1171,7 @@ _mesa_init_lighting( struct gl_context *ctx )
    GLuint i;
 
    /* Lighting group */
+   ctx->Light._EnabledLights = 0;
    for (i = 0; i < MAX_LIGHTS; i++) {
       init_light( &ctx->Light.Light[i], i );
    }

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index b86a0ee..bea589f 100644 (file)
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -630,6 +630,8 @@ struct gl_light_attrib
     * Derived state for optimizations: 
     */
    /*@{*/
+   GLbitfield _EnabledLights;  /**< bitmask containing enabled lights */
+
    GLboolean _NeedEyeCoords;           
    GLboolean _NeedVertices;            /**< Use fast shader? */
    struct gl_light EnabledList;         /**< List sentinel */