1 /* 2 * Copyright (C) 2009 Apple 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef WebGLTexture_h 27 #define WebGLTexture_h 28 29 #include "WebGLObject.h" 30 31 #include <wtf/PassRefPtr.h> 32 #include <wtf/RefCounted.h> 33 #include <wtf/Vector.h> 34 35 namespace WebCore { 36 37 class WebGLTexture : public WebGLObject { 38 public: ~WebGLTexture()39 virtual ~WebGLTexture() { deleteObject(); } 40 41 static PassRefPtr<WebGLTexture> create(WebGLRenderingContext*); 42 43 void setTarget(GC3Denum target, GC3Dint maxLevel); 44 void setParameteri(GC3Denum pname, GC3Dint param); 45 void setParameterf(GC3Denum pname, GC3Dfloat param); 46 getTarget()47 GC3Denum getTarget() const { return m_target; } 48 getMinFilter()49 int getMinFilter() const { return m_minFilter; } 50 51 void setLevelInfo(GC3Denum target, GC3Dint level, GC3Denum internalFormat, GC3Dsizei width, GC3Dsizei height, GC3Denum type); 52 53 bool canGenerateMipmaps(); 54 // Generate all level information. 55 void generateMipmapLevelInfo(); 56 57 GC3Denum getInternalFormat(GC3Denum target, GC3Dint level) const; 58 GC3Denum getType(GC3Denum target, GC3Dint level) const; 59 GC3Dsizei getWidth(GC3Denum target, GC3Dint level) const; 60 GC3Dsizei getHeight(GC3Denum target, GC3Dint level) const; 61 62 // Whether width/height is NotPowerOfTwo. 63 static bool isNPOT(GC3Dsizei, GC3Dsizei); 64 65 bool isNPOT() const; 66 // Determine if texture sampling should always return [0, 0, 0, 1] (OpenGL ES 2.0 Sec 3.8.2). 67 bool needToUseBlackTexture() const; 68 hasEverBeenBound()69 bool hasEverBeenBound() const { return object() && m_target; } 70 71 static GC3Dint computeLevelCount(GC3Dsizei width, GC3Dsizei height); 72 73 protected: 74 WebGLTexture(WebGLRenderingContext*); 75 76 virtual void deleteObjectImpl(Platform3DObject); 77 78 private: 79 class LevelInfo { 80 public: LevelInfo()81 LevelInfo() 82 : valid(false) 83 , internalFormat(0) 84 , width(0) 85 , height(0) 86 , type(0) 87 { 88 } 89 setInfo(GC3Denum internalFmt,GC3Dsizei w,GC3Dsizei h,GC3Denum tp)90 void setInfo(GC3Denum internalFmt, GC3Dsizei w, GC3Dsizei h, GC3Denum tp) 91 { 92 valid = true; 93 internalFormat = internalFmt; 94 width = w; 95 height = h; 96 type = tp; 97 } 98 99 bool valid; 100 GC3Denum internalFormat; 101 GC3Dsizei width; 102 GC3Dsizei height; 103 GC3Denum type; 104 }; 105 isTexture()106 virtual bool isTexture() const { return true; } 107 108 void update(); 109 110 int mapTargetToIndex(GC3Denum) const; 111 112 const LevelInfo* getLevelInfo(GC3Denum target, GC3Dint level) const; 113 114 GC3Denum m_target; 115 116 GC3Denum m_minFilter; 117 GC3Denum m_magFilter; 118 GC3Denum m_wrapS; 119 GC3Denum m_wrapT; 120 121 Vector<Vector<LevelInfo> > m_info; 122 123 bool m_isNPOT; 124 bool m_isComplete; 125 bool m_needToUseBlackTexture; 126 }; 127 128 } // namespace WebCore 129 130 #endif // WebGLTexture_h 131