fix: reduce terrain mask texture's size to tileSize / 4 to save some memory

* fix: reduce terrain mask texture's size to tileSize / 4 to save some memory

* fixing specs

Author: fuzhenn

packages/gl/src/layer/terrain/TerrainLayerRenderer.js

@@ -715,8 +715,8 @@ class TerrainLayerRenderer extends MaskRendererMixin(TileLayerRendererable(Layer
     _createTerrainMaskTexture() {
         const regl = this.device;
         const tileSize = this.layer.getTileSize().width;
-        const width = tileSize * 2;
-        const height = tileSize * 2;
+        const width = tileSize / 2;
+        const height = tileSize / 2;
         const color = regl.texture({
             // min 和 mag 必须用nearest，选择别的值会造成mask的高程值发生错误
             min: 'nearest',

packages/maptalks-gl/rollup.config.js

@@ -2,7 +2,6 @@ const { nodeResolve } = require('@rollup/plugin-node-resolve');
 const commonjs = require('@rollup/plugin-commonjs');
 const pkg = require('./package.json');
 const terser = require('@rollup/plugin-terser');
-const sourcemaps = require('rollup-plugin-sourcemaps');
 const copy = require('rollup-plugin-copy');
 
 const outputFile = pkg.main;
@@ -28,7 +27,6 @@ module.exports = [
                 main: true
             }),
             commonjs(),
-            sourcemaps(),
             terser({
                 mangle: true,
                 compress: {

packages/vt/src/layer/plugins/painters/FillPainter.js

@@ -676,6 +676,7 @@ class FillPainter extends BasicPainter {
             projViewMatrix,
             glScale,
             viewport: isRenderingTerrainSkin && context && context.viewport,
+            maskViewport: isRenderingTerrainSkin && context && context.maskViewport,
             hasSSRGround: context && context.hasSSRGround
             // blendSrcIsOne: +(!!(blendSrc === 'one' || blendSrc === 1))
         };

packages/vt/src/layer/plugins/painters/TerrainFlatMaskPainter.js

@@ -112,7 +112,7 @@ class TerrainFlatMaskPainter extends BasicPainter {
         // const blendSrc = this.sceneConfig.blendSrc;
         const uniforms = {
             projViewMatrix,
-            viewport: context && context.viewport
+            viewport: context && context.maskViewport,
         };
         return uniforms;
     }

packages/vt/src/layer/renderer/VectorTileLayerRenderer.js

@@ -1315,6 +1315,7 @@ class VectorTileLayerRenderer extends CanvasCompatible(TileLayerRendererable(Lay
             };
             TERRAIN_CLEAR.framebuffer = texture;
             terrainRegl.clear(TERRAIN_CLEAR);
+            this._parentContext.maskViewport = getTileViewport(tileSize / 4);
             this._parentContext.viewport = getTileViewport(tileSize);
             // 如果矢量瓦片的目标绘制尺寸过大，拉伸后会过于失真，还不如不去绘制
             this._drawTerrainTile(skinImage.tile);

packages/vt/test/specs/update.spec.js

@@ -2395,7 +2395,7 @@ describe('update style specs', () => {
                 }, 300);
             }, 300);
 
-        }, 1500);
+        }, 2000);
 
     });