Optimize updateFastFaceRow processing by removing some TileSpec copy (#5678)

* Optimize updateFastFaceRow processing by removing some TileSpec copy

It permit to decrease this function from 54% runtime to 45% and reduce copy from 14% runtime to 12.5%
getTileInfo also reduced from 27% to 23%

* makeFastFace should use a const ref too

this trigger a const pointer need in the underlying function

Also fix some code style and prevent calculating 4 times the same position at a point

* Reduce a comparison cost for lights in updateFastFaceRow

diff --git a/src/content_mapblock.cpp b/src/content_mapblock.cpp
index 6673e2bd9f9ca96309889fbd67091d8355b9cba1..8be0a7d7b94353ad981d85362a678dd77be7b8fd 100644 (file)
--- a/src/content_mapblock.cpp
+++ b/src/content_mapblock.cpp
@@ -76,7 +76,7 @@ MapblockMeshGenerator::MapblockMeshGenerator(MeshMakeData *input, MeshCollector
 
 void MapblockMeshGenerator::useTile(int index, bool disable_backface_culling)
 {
-       tile = getNodeTileN(n, p, index, data);
+       getNodeTileN(n, p, index, data, tile);
        if (!data->m_smooth_lighting)
                color = encode_light(light, f->light_source);
        for (int layer = 0; layer < MAX_TILE_LAYERS; layer++) {
@@ -88,14 +88,14 @@ void MapblockMeshGenerator::useTile(int index, bool disable_backface_culling)
 
 void MapblockMeshGenerator::useDefaultTile(bool set_color)
 {
-       tile = getNodeTile(n, p, v3s16(0, 0, 0), data);
+       getNodeTile(n, p, v3s16(0, 0, 0), data, tile);
        if (set_color && !data->m_smooth_lighting)
                color = encode_light(light, f->light_source);
 }
 
-TileSpec MapblockMeshGenerator::getTile(const v3s16& direction)
+void MapblockMeshGenerator::getTile(const v3s16& direction, TileSpec &tile)
 {
-       return getNodeTile(n, p, direction, data);
+       getNodeTile(n, p, direction, data, tile);
 }
 
 void MapblockMeshGenerator::drawQuad(v3f *coords, const v3s16 &normal)
@@ -660,7 +660,7 @@ void MapblockMeshGenerator::drawGlasslikeFramedNode()
 {
        TileSpec tiles[6];
        for (int face = 0; face < 6; face++)
-               tiles[face] = getTile(g_6dirs[face]);
+               getTile(g_6dirs[face], tiles[face]);
 
        TileSpec glass_tiles[6];
        if (tiles[1].layers[0].texture &&
@@ -1193,7 +1193,7 @@ void MapblockMeshGenerator::drawNodeboxNode()
        TileSpec tiles[6];
        for (int face = 0; face < 6; face++) {
                // Handles facedir rotation for textures
-               tiles[face] = getTile(tile_dirs[face]);
+               getTile(tile_dirs[face], tiles[face]);
        }
 
        // locate possible neighboring nodes to connect to

diff --git a/src/content_mapblock.h b/src/content_mapblock.h
index 6866a4498373ff777659a2862928532b373df826..310e38e7cbf284168296357ad5cef9ef378f877a 100644 (file)
--- a/src/content_mapblock.h
+++ b/src/content_mapblock.h
@@ -65,7 +65,7 @@ public:
 
        void useTile(int index, bool disable_backface_culling);
        void useDefaultTile(bool set_color = true);
-       TileSpec getTile(const v3s16 &direction);
+       void getTile(const v3s16 &direction, TileSpec &tile);
 
 // face drawing
        void drawQuad(v3f *vertices, const v3s16 &normal = v3s16(0, 0, 0));

diff --git a/src/mapblock_mesh.cpp b/src/mapblock_mesh.cpp
index 0bba644e6c5568846b435ba556d8ea570f5ae6d4..6781f21affa7a4bf28df16ac6c97048d22011a1b 100644 (file)
--- a/src/mapblock_mesh.cpp
+++ b/src/mapblock_mesh.cpp
@@ -433,7 +433,7 @@ struct FastFace
        u8 layernum;
 };
 
-static void makeFastFace(TileSpec tile, u16 li0, u16 li1, u16 li2, u16 li3,
+static void makeFastFace(const TileSpec &tile, u16 li0, u16 li1, u16 li2, u16 li3,
        v3f p, v3s16 dir, v3f scale, std::vector<FastFace> &dest)
 {
        // Position is at the center of the cube.
@@ -603,7 +603,7 @@ static void makeFastFace(TileSpec tile, u16 li0, u16 li1, u16 li2, u16 li3,
                core::vector2d<f32>(x0 + w * abs_scale, y0) };
 
        for (int layernum = 0; layernum < MAX_TILE_LAYERS; layernum++) {
-               TileLayer *layer = &tile.layers[layernum];
+               const TileLayer *layer = &tile.layers[layernum];
                if (layer->texture_id == 0)
                        continue;
 
@@ -689,11 +689,11 @@ static u8 face_contents(content_t m1, content_t m2, bool *equivalent,
 /*
        Gets nth node tile (0 <= n <= 5).
 */
-TileSpec getNodeTileN(MapNode mn, v3s16 p, u8 tileindex, MeshMakeData *data)
+void getNodeTileN(MapNode mn, v3s16 p, u8 tileindex, MeshMakeData *data, TileSpec &tile)
 {
        INodeDefManager *ndef = data->m_client->ndef();
        const ContentFeatures &f = ndef->get(mn);
-       TileSpec tile = f.tiles[tileindex];
+       tile = f.tiles[tileindex];
        TileLayer *top_layer = NULL;
        for (int layernum = 0; layernum < MAX_TILE_LAYERS; layernum++) {
                TileLayer *layer = &tile.layers[layernum];
@@ -706,13 +706,12 @@ TileSpec getNodeTileN(MapNode mn, v3s16 p, u8 tileindex, MeshMakeData *data)
        // Apply temporary crack
        if (p == data->m_crack_pos_relative)
                top_layer->material_flags |= MATERIAL_FLAG_CRACK;
-       return tile;
 }
 
 /*
        Gets node tile given a face direction.
 */
-TileSpec getNodeTile(MapNode mn, v3s16 p, v3s16 dir, MeshMakeData *data)
+void getNodeTile(MapNode mn, v3s16 p, v3s16 dir, MeshMakeData *data, TileSpec &tile)
 {
        INodeDefManager *ndef = data->m_client->ndef();
 
@@ -769,9 +768,8 @@ TileSpec getNodeTile(MapNode mn, v3s16 p, v3s16 dir, MeshMakeData *data)
 
        };
        u16 tile_index=facedir*16 + dir_i;
-       TileSpec tile = getNodeTileN(mn, p, dir_to_tile[tile_index], data);
+       getNodeTileN(mn, p, dir_to_tile[tile_index], data, tile);
        tile.rotation = dir_to_tile[tile_index + 1];
-       return tile;
 }
 
 static void getTileInfo(
@@ -791,7 +789,7 @@ static void getTileInfo(
        INodeDefManager *ndef = data->m_client->ndef();
        v3s16 blockpos_nodes = data->m_blockpos * MAP_BLOCKSIZE;
 
-       MapNode &n0 = vmanip.getNodeRefUnsafe(blockpos_nodes + p);
+       const MapNode &n0 = vmanip.getNodeRefUnsafe(blockpos_nodes + p);
 
        // Don't even try to get n1 if n0 is already CONTENT_IGNORE
        if (n0.getContent() == CONTENT_IGNORE) {
@@ -799,8 +797,7 @@ static void getTileInfo(
                return;
        }
 
-       const MapNode &n1 = vmanip.getNodeRefUnsafeCheckFlags(
-               blockpos_nodes + p + face_dir);
+       const MapNode &n1 = vmanip.getNodeRefUnsafeCheckFlags(blockpos_nodes + p + face_dir);
 
        if (n1.getContent() == CONTENT_IGNORE) {
                makes_face = false;
@@ -812,8 +809,7 @@ static void getTileInfo(
        u8 mf = face_contents(n0.getContent(), n1.getContent(),
                        &equivalent, ndef);
 
-       if(mf == 0)
-       {
+       if (mf == 0) {
                makes_face = false;
                return;
        }
@@ -830,34 +826,31 @@ static void getTileInfo(
                p_corrected = p + face_dir;
                face_dir_corrected = -face_dir;
        }
-       tile = getNodeTile(n, p_corrected, face_dir_corrected, data);
+
+       getNodeTile(n, p_corrected, face_dir_corrected, data, tile);
        const ContentFeatures &f = ndef->get(n);
        tile.emissive_light = f.light_source;
 
        // eg. water and glass
-       if (equivalent)
+       if (equivalent) {
                for (int layernum = 0; layernum < MAX_TILE_LAYERS; layernum++)
                        tile.layers[layernum].material_flags |=
                                MATERIAL_FLAG_BACKFACE_CULLING;
+       }
 
-       if (data->m_smooth_lighting == false)
-       {
+       if (!data->m_smooth_lighting) {
                lights[0] = lights[1] = lights[2] = lights[3] =
                                getFaceLight(n0, n1, face_dir, ndef);
        }
-       else
-       {
+       else {
                v3s16 vertex_dirs[4];
                getNodeVertexDirs(face_dir_corrected, vertex_dirs);
-               for(u16 i=0; i<4; i++)
-               {
-                       lights[i] = getSmoothLight(
-                                       blockpos_nodes + p_corrected,
-                                       vertex_dirs[i], data);
+
+               v3s16 light_p = blockpos_nodes + p_corrected;
+               for (u16 i = 0; i < 4; i++) {
+                       lights[i] = getSmoothLight(light_p, vertex_dirs[i], data);
                }
        }
-
-       return;
 }
 
 /*
@@ -914,10 +907,7 @@ static void updateFastFaceRow(
                        if (next_makes_face == makes_face
                                        && next_p_corrected == p_corrected + translate_dir
                                        && next_face_dir_corrected == face_dir_corrected
-                                       && next_lights[0] == lights[0]
-                                       && next_lights[1] == lights[1]
-                                       && next_lights[2] == lights[2]
-                                       && next_lights[3] == lights[3]
+                                       && memcmp(next_lights, lights, ARRLEN(lights) * sizeof(u16)) == 0
                                        && next_tile.isTileable(tile)) {
                                next_is_different = false;
                                continuous_tiles_count++;
@@ -932,7 +922,8 @@ static void updateFastFaceRow(
                                // Floating point conversion of the position vector
                                v3f pf(p_corrected.X, p_corrected.Y, p_corrected.Z);
                                // Center point of face (kind of)
-                               v3f sp = pf - ((f32)continuous_tiles_count / 2.0 - 0.5) * translate_dir_f;
+                               v3f sp = pf -
+                                       ((f32)continuous_tiles_count / 2.0f - 0.5f) * translate_dir_f;
                                v3f scale(1,1,1);
 
                                if(translate_dir.X != 0) {
@@ -1148,8 +1139,7 @@ MapBlockMesh::MapBlockMesh(MeshMakeData *data, v3s16 camera_offset):
                                        m_animation_frame_offsets[std::pair<u8, u32>(layer, i)] = 0;
                                }
                                // Replace tile texture with the first animation frame
-                               FrameSpec animation_frame = p.layer.frames[0];
-                               p.layer.texture = animation_frame.texture;
+                               p.layer.texture = p.layer.frames[0].texture;
                        }
 
                        if (!m_enable_shaders) {
@@ -1337,7 +1327,7 @@ bool MapBlockMesh::animate(bool faraway, float time, int crack, u32 daynight_rat
                scene::IMeshBuffer *buf = m_mesh[i->first.first]->
                        getMeshBuffer(i->first.second);
 
-               FrameSpec animation_frame = tile.frames[frame];
+               const FrameSpec &animation_frame = tile.frames[frame];
                buf->getMaterial().setTexture(0, animation_frame.texture);
                if (m_enable_shaders) {
                        if (animation_frame.normal_texture) {

diff --git a/src/mapblock_mesh.h b/src/mapblock_mesh.h
index f32df39581b8428f7237a6325e65c255fcb3edb1..93d932a7ba5dd7d6d8dd2ce9bd54eade47b1294d 100644 (file)
--- a/src/mapblock_mesh.h
+++ b/src/mapblock_mesh.h
@@ -267,8 +267,10 @@ void final_color_blend(video::SColor *result,
 
 // Retrieves the TileSpec of a face of a node
 // Adds MATERIAL_FLAG_CRACK if the node is cracked
-TileSpec getNodeTileN(MapNode mn, v3s16 p, u8 tileindex, MeshMakeData *data);
-TileSpec getNodeTile(MapNode mn, v3s16 p, v3s16 dir, MeshMakeData *data);
+// TileSpec should be passed as reference due to the underlying TileFrame and its vector
+// TileFrame vector copy cost very much to client
+void getNodeTileN(MapNode mn, v3s16 p, u8 tileindex, MeshMakeData *data, TileSpec &tile);
+void getNodeTile(MapNode mn, v3s16 p, v3s16 dir, MeshMakeData *data, TileSpec &tile);
 
 #endif