Texture compression

Apps/Sandcastle/gallery/Materials.html

@@ -202,6 +202,28 @@
      });
 }
 
+function applyCompressedTextureMaterial(primitive, scene) {
+    Sandcastle.declare(applyCompressedTextureMaterial); // For highlighting in Sandcastle.
+
+    var compressedImageUrl;
+    if (scene.getCompressedTextureFormatSupported('s3tc')) {
+        compressedImageUrl = '../images/LogoDXT1.ktx';
+    } else if (scene.getCompressedTextureFormatSupported('etc1')) {
+        compressedImageUrl = '../images/LogoETC1.ktx';
+    } else if (scene.getCompressedTextureFormatSupported('pvrtc')) {
+        compressedImageUrl = '../images/LogoPVR.ktx';
+    }
+
+    primitive.appearance.material = new Cesium.Material({
+        fabric : {
+            type : 'Image',
+            uniforms : {
+                image : compressedImageUrl
+            }
+        }
+    });
+}
+
 function applyNormalMapMaterial(primitive, scene) {
     Sandcastle.declare(applyNormalMapMaterial); // For highlighting in Sandcastle.
     primitive.appearance.material = new Cesium.Material({
@@ -310,6 +332,13 @@
             applyImageMaterial(rectangle, scene);
             Sandcastle.highlight(applyImageMaterial);
         }
+    }, {
+        text : 'Compressed Image',
+        onselect : function() {
+            toggleRectangleVisibility();
+            applyCompressedTextureMaterial(rectangle, scene);
+            Sandcastle.highlight(applyCompressedTextureMaterial);
+        }
     }]);
 
     Sandcastle.addToolbarMenu([{
@@ -443,7 +472,7 @@
             Sandcastle.highlight(applyPolylineOutlineMaterial);
         }
     }]);
-    
+
     document.getElementById('toolbar').style.width = '10%';
 }
 

CHANGES.md

@@ -4,6 +4,11 @@ Change Log
 ### 1.31 - 2017-03-01
 
 * Enable rendering `GroundPrimitives` on hardware without the `EXT_frag_depth` extension; however, this could cause artifacts for certain viewing angles.
+* Added compressed texture support. [#4758](https://github.com/AnalyticalGraphicsInc/cesium/pull/4758)
+   * glTF models and imagery layers can now reference [KTX](https://www.khronos.org/opengles/sdk/tools/KTX/) textures and textures compressed with [crunch](https://github.com/BinomialLLC/crunch).
+   * Added `loadKTX`, to load KTX textures, and `loadCRN` to load crunch compressed textures.
+   * Added new `PixelFormat` and `WebGLConstants` enums from WebGL extensions `WEBGL_compressed_s3tc`, `WEBGL_compressed_texture_pvrtc`, and `WEBGL_compressed_texture_etc1`.
+   * Added `CompressedTextureBuffer`.
 
 ### 1.30 - 2017-02-01
 

LICENSE.md

@@ -288,6 +288,85 @@ OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
 THIS SOFTWARE.
 
+### crunch
+
+https://github.com/BinomialLLC/crunch
+
+>crunch/crnlib uses the ZLIB license:
+>http://opensource.org/licenses/Zlib
+>
+>Copyright (c) 2010-2016 Richard Geldreich, Jr. and Binomial LLC
+>
+>This software is provided 'as-is', without any express or implied
+warranty.  In no event will the authors be held liable for any damages
+arising from the use of this software.
+>
+>Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+>
+>1. The origin of this software must not be misrepresented; you must not
+claim that you wrote the original software. If you use this software
+in a product, an acknowledgment in the product documentation would be
+appreciated but is not required.
+>
+>2. Altered source versions must be plainly marked as such, and must not be
+misrepresented as being the original software.
+>
+>3. This notice may not be removed or altered from any source distribution.
+
+### crunch_lib.cpp
+
+https://github.com/Apress/html5-game-dev-insights/blob/master/jones_ch21/crunch_webgl/crunch_js/crunch_lib.cpp
+
+>Copyright (c) 2013, Evan Parker, Brandon Jones. All rights reserved.
+>
+>Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+>
+>  * Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+>  * Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+>
+>THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+
+### texture-tester
+
+https://github.com/toji/texture-tester
+
+>Copyright (c) 2014, Brandon Jones. All rights reserved.
+>
+>Redistribution and use in source and binary forms, with or without modification,
+>are permitted provided that the following conditions are met:
+>
+>* Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+>* Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+>
+>THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
 Tests
 =====
 

Source/Core/CompressedTextureBuffer.js

@@ -0,0 +1,93 @@
+/*global define*/
+define([
+        './defined',
+        './defineProperties'
+    ], function(
+        defined,
+        defineProperties
+    ) {
+    'use strict';
+
+    /**
+     * Describes a compressed texture and contains a compressed texture buffer.
+     *
+     * @param {PixelFormat} internalFormat The pixel format of the compressed texture.
+     * @param {Number} width The width of the texture.
+     * @param {Number} height The height of the texture.
+     * @param {Uint8Array} buffer The compressed texture buffer.
+     */
+    function CompressedTextureBuffer(internalFormat, width, height, buffer) {
+        this._format = internalFormat;
+        this._width = width;
+        this._height = height;
+        this._buffer =  buffer;
+    }
+
+    defineProperties(CompressedTextureBuffer.prototype, {
+        /**
+         * The format of the compressed texture.
+         * @type PixelFormat
+         * @readonly
+         */
+        internalFormat : {
+            get : function() {
+                return this._format;
+            }
+        },
+        /**
+         * The width of the texture.
+         * @type Number
+         * @readonly
+         */
+        width : {
+            get : function() {
+                return this._width;
+            }
+        },
+        /**
+         * The height of the texture.
+         * @type Number
+         * @readonly
+         */
+        height : {
+            get : function() {
+                return this._height;
+            }
+        },
+        /**
+         * The compressed texture buffer.
+         * @type Uint8Array
+         * @readonly
+         */
+        bufferView : {
+            get : function() {
+                return this._buffer;
+            }
+        }
+    });
+
+    /**
+     * Creates a shallow clone of a compressed texture buffer.
+     *
+     * @param {CompressedTextureBuffer} object The compressed texture buffer to be cloned.
+     * @return {CompressedTextureBuffer} A shallow clone of the compressed texture buffer.
+     */
+    CompressedTextureBuffer.clone = function(object) {
+        if (!defined(object)) {
+            return undefined;
+        }
+
+        return new CompressedTextureBuffer(object._format, object._width, object._height, object._buffer);
+    };
+
+    /**
+     * Creates a shallow clone of this compressed texture buffer.
+     *
+     * @return {CompressedTextureBuffer} A shallow clone of the compressed texture buffer.
+     */
+    CompressedTextureBuffer.prototype.clone = function() {
+        return CompressedTextureBuffer.clone(this);
+    };
+
+    return CompressedTextureBuffer;
+});