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| 1 /* | |
| 2 * Copyright (C) 2012 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 * notice, this list of conditions and the following disclaimer in the | |
| 12 * documentation and/or other materials provided with the distribution. | |
| 13 * | |
| 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY | |
| 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY | |
| 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "sky/engine/config.h" | |
| 27 | |
| 28 #include "sky/engine/core/html/canvas/WebGLDepthTexture.h" | |
| 29 | |
| 30 namespace blink { | |
| 31 | |
| 32 WebGLDepthTexture::WebGLDepthTexture(WebGLRenderingContextBase* context) | |
| 33 : WebGLExtension(context) | |
| 34 { | |
| 35 context->extensionsUtil()->ensureExtensionEnabled("GL_CHROMIUM_depth_texture
"); | |
| 36 } | |
| 37 | |
| 38 WebGLDepthTexture::~WebGLDepthTexture() | |
| 39 { | |
| 40 } | |
| 41 | |
| 42 WebGLExtensionName WebGLDepthTexture::name() const | |
| 43 { | |
| 44 return WebGLDepthTextureName; | |
| 45 } | |
| 46 | |
| 47 PassRefPtr<WebGLDepthTexture> WebGLDepthTexture::create(WebGLRenderingContextBas
e* context) | |
| 48 { | |
| 49 return adoptRef(new WebGLDepthTexture(context)); | |
| 50 } | |
| 51 | |
| 52 bool WebGLDepthTexture::supported(WebGLRenderingContextBase* context) | |
| 53 { | |
| 54 Extensions3DUtil* extensionsUtil = context->extensionsUtil(); | |
| 55 // Emulating the UNSIGNED_INT_24_8_WEBGL texture internal format in terms | |
| 56 // of two separate texture objects is too difficult, so disable depth | |
| 57 // textures unless a packed depth/stencil format is available. | |
| 58 if (!extensionsUtil->supportsExtension("GL_OES_packed_depth_stencil")) | |
| 59 return false; | |
| 60 return extensionsUtil->supportsExtension("GL_CHROMIUM_depth_texture") | |
| 61 || extensionsUtil->supportsExtension("GL_OES_depth_texture") | |
| 62 || extensionsUtil->supportsExtension("GL_ARB_depth_texture"); | |
| 63 } | |
| 64 | |
| 65 const char* WebGLDepthTexture::extensionName() | |
| 66 { | |
| 67 return "WEBGL_depth_texture"; | |
| 68 } | |
| 69 | |
| 70 } // namespace blink | |
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