converted smooth-lighting into a primitive

for the first time ever, smooth-lit cave mode is now possible \o/

overviewer_core/rendermodes.py

@@ -135,3 +135,6 @@ class Lighting(RenderPrimitive):
         
         self._facemasks = (top, left, right)
         return self._facemasks
+
+class SmoothLighting(Lighting):
+    name = "smooth-lighting"

overviewer_core/src/primitives/lighting.c

@@ -16,36 +16,9 @@
  */
 
 #include "../overviewer.h"
+#include "lighting.h"
 #include <math.h>
 
-typedef struct {
-    PyObject *facemasks_py;
-    PyObject *facemasks[3];
-    
-    /* extra data, loaded off the chunk class */
-    PyObject *skylight, *blocklight;
-    PyObject *left_skylight, *left_blocklight;
-    PyObject *right_skylight, *right_blocklight;
-    PyObject *up_left_skylight, *up_left_blocklight;
-    PyObject *up_right_skylight, *up_right_blocklight;
-    
-    /* light color image, loaded if color_light is True */
-    PyObject *lightcolor;
-    
-    /* can be overridden in derived rendermodes to control lighting
-       arguments are data, skylight, blocklight, return RGB */
-    void (*calculate_light_color)(void *, unsigned char, unsigned char, unsigned char *, unsigned char *, unsigned char *);
-    
-    /* can be set to 0 in derived modes to indicate that lighting the chunk
-     * sides is actually important. Right now, this is used in cave mode
-     */
-    int skip_sides;
-    
-    float strength;
-    int color;
-    int night;
-} RenderPrimitiveLighting;
-
 /* figures out the color from a given skylight and blocklight,
    used in lighting calculations */
 static void

overviewer_core/src/primitives/lighting.h

@@ -0,0 +1,53 @@
+/* 
+ * This file is part of the Minecraft Overviewer.
+ *
+ * Minecraft Overviewer is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Minecraft Overviewer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with the Overviewer.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "../overviewer.h"
+
+typedef struct {
+    PyObject *facemasks_py;
+    PyObject *facemasks[3];
+    
+    /* extra data, loaded off the chunk class */
+    PyObject *skylight, *blocklight;
+    PyObject *left_skylight, *left_blocklight;
+    PyObject *right_skylight, *right_blocklight;
+    PyObject *up_left_skylight, *up_left_blocklight;
+    PyObject *up_right_skylight, *up_right_blocklight;
+    
+    /* light color image, loaded if color_light is True */
+    PyObject *lightcolor;
+    
+    /* can be overridden in derived rendermodes to control lighting
+       arguments are data, skylight, blocklight, return RGB */
+    void (*calculate_light_color)(void *, unsigned char, unsigned char, unsigned char *, unsigned char *, unsigned char *);
+    
+    /* can be set to 0 in derived modes to indicate that lighting the chunk
+     * sides is actually important. Right now, this is used in cave mode
+     */
+    int skip_sides;
+    
+    float strength;
+    int color;
+    int night;
+} RenderPrimitiveLighting;
+
+/* exposed so that smooth-lighting can use them */
+extern RenderPrimitiveInterface primitive_lighting;
+int lighting_is_face_occluded(RenderState *state, int skip_sides, int x, int y, int z);
+void get_lighting_color(RenderPrimitiveLighting *self, RenderState *state,
+                        int x, int y, int z,
+                        unsigned char *r, unsigned char *g, unsigned char *b);

overviewer_core/src/primitives/smooth-lighting.c

@@ -15,9 +15,15 @@
  * with the Overviewer.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "overviewer.h"
+#include "../overviewer.h"
+#include "lighting.h"
 #include <math.h>
 
+typedef struct {
+    /* inherits from lighting */
+    RenderPrimitiveLighting parent;
+} RenderPrimitiveSmoothLighting;
+
 /* structure representing one corner of a face (see below) */
 struct SmoothLightingCorner {
     /* where this corner shows up on each block texture */
@@ -123,12 +129,12 @@ enum
 };
 
 static void
-do_shading_with_rule(RenderModeSmoothLighting *self, RenderState *state, struct SmoothLightingFace face) {
+do_shading_with_rule(RenderPrimitiveSmoothLighting *self, RenderState *state, struct SmoothLightingFace face) {
     int i;
-    RenderModeLighting *lighting = (RenderModeLighting *)self;
+    RenderPrimitiveLighting *lighting = (RenderPrimitiveLighting *)self;
     int x = state->imgx, y = state->imgy;
     struct SmoothLightingCorner *pts = face.corners;
-    float comp_shade_strength = 1.0 - lighting->shade_strength;
+    float comp_shade_strength = 1.0 - lighting->strength;
     unsigned char pts_r[4] = {0, 0, 0, 0};
     unsigned char pts_g[4] = {0, 0, 0, 0};
     unsigned char pts_b[4] = {0, 0, 0, 0};
@@ -137,7 +143,7 @@ do_shading_with_rule(RenderModeSmoothLighting *self, RenderState *state, struct
     int cz = state->z + face.dz;
     
     /* first, check for occlusion if the block is in the local chunk */
-    if (rendermode_lighting_is_face_occluded(state, 0, cx, cy, cz))
+    if (lighting_is_face_occluded(state, 0, cx, cy, cz))
         return;
     
     /* calculate the lighting colors for each point */
@@ -189,55 +195,38 @@ do_shading_with_rule(RenderModeSmoothLighting *self, RenderState *state, struct
 }
 
 static int
-rendermode_smooth_lighting_start(void *data, RenderState *state, PyObject *options) {
+smooth_lighting_start(void *data, RenderState *state, PyObject *support) {
     /* first, chain up */
-    int ret = rendermode_lighting.start(data, state, options);
+    int ret = primitive_lighting.start(data, state, support);
     if (ret != 0)
         return ret;    
-    
     return 0;
 }
 
 static void
-rendermode_smooth_lighting_finish(void *data, RenderState *state) {
+smooth_lighting_finish(void *data, RenderState *state) {
     /* nothing special to do */
-    rendermode_lighting.finish(data, state);
+    primitive_lighting.finish(data, state);
-}
-
-static int
-rendermode_smooth_lighting_occluded(void *data, RenderState *state, int x, int y, int z) {
-    /* no special occlusion here */
-    return rendermode_lighting.occluded(data, state, x, y, z);
-}
-
-static int
-rendermode_smooth_lighting_hidden(void *data, RenderState *state, int x, int y, int z) {
-    /* no special hiding here */
-    return rendermode_lighting.hidden(data, state, x, y, z);
 }
 
 static void
-rendermode_smooth_lighting_draw(void *data, RenderState *state, PyObject *src, PyObject *mask, PyObject *mask_light) {
+smooth_lighting_draw(void *data, RenderState *state, PyObject *src, PyObject *mask, PyObject *mask_light) {
     int light_top = 1;
     int light_left = 1;
     int light_right = 1;
-    RenderModeSmoothLighting *self = (RenderModeSmoothLighting *)data;
+    RenderPrimitiveSmoothLighting *self = (RenderPrimitiveSmoothLighting *)data;
     
     /* special case for leaves, water 8, water 9
        -- these are also smooth-lit! */
     if (state->block != 18 && state->block != 8 && state->block != 9 && is_transparent(state->block))
     {
         /* transparent blocks are rendered as usual, with flat lighting */
-        rendermode_lighting.draw(data, state, src, mask, mask_light);
+        primitive_lighting.draw(data, state, src, mask, mask_light);
         return;
     }
     
     /* non-transparent blocks get the special smooth treatment */
     
-    /* nothing special to do, but we do want to avoid vanilla
-     * lighting mode draws */
-    rendermode_normal.draw(data, state, src, mask, mask_light);
-    
     /* special code for water */
     if (state->block == 9)
     {
@@ -257,15 +246,11 @@ rendermode_smooth_lighting_draw(void *data, RenderState *state, PyObject *src, P
         do_shading_with_rule(self, state, lighting_rules[FACE_RIGHT]);
 }
 
-RenderModeInterface rendermode_smooth_lighting = {
+RenderPrimitiveInterface primitive_smooth_lighting = {
-    "smooth-lighting", "Smooth Lighting",
+    "smooth-lighting", sizeof(RenderPrimitiveSmoothLighting),
-    "like \"lighting\", except smooth",
+    smooth_lighting_start,
+    smooth_lighting_finish,
     NULL,
-    &rendermode_lighting,
+    NULL,
-    sizeof(RenderModeSmoothLighting),
+    smooth_lighting_draw,
-    rendermode_smooth_lighting_start,
-    rendermode_smooth_lighting_finish,
-    rendermode_smooth_lighting_occluded,
-    rendermode_smooth_lighting_hidden,
-    rendermode_smooth_lighting_draw,
 };

overviewer_core/src/rendermodes.h

@@ -117,21 +117,6 @@ typedef struct {
 } RenderModeOverlay;
 extern RenderModeInterface rendermode_overlay;
 
-/* exposed so it can be used in other per-face occlusion checks */
-int rendermode_lighting_is_face_occluded(RenderState *state, int skip_sides, int x, int y, int z);
-
-/* exposed so sub-modes can look at colors directly */
-void get_lighting_color(RenderModeLighting *self, RenderState *state,
-                        int x, int y, int z,
-                        unsigned char *r, unsigned char *g, unsigned char *b);
-
-/* SMOOTH LIGHTING */
-typedef struct {
-    /* inherits from lighting */
-    RenderModeLighting parent;
-} RenderModeSmoothLighting;
-extern RenderModeInterface rendermode_smooth_lighting;
-
 /* SPAWN */
 typedef struct {
     /* inherits from overlay */