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 "bindings/core/v8/ScriptWrappable.h" 30 #include "core/html/canvas/WebGLSharedObject.h" 31 #include "wtf/PassRefPtr.h" 32 #include "wtf/Vector.h" 33 34 namespace blink { 35 36 class WebGLTexture FINAL : public WebGLSharedObject, public ScriptWrappable { 37 DEFINE_WRAPPERTYPEINFO(); 38 public: 39 enum TextureExtensionFlag { 40 NoTextureExtensionEnabled = 0, 41 TextureFloatLinearExtensionEnabled = 1 << 0, 42 TextureHalfFloatLinearExtensionEnabled = 1 << 1 43 }; 44 virtual ~WebGLTexture(); 45 46 static PassRefPtrWillBeRawPtr<WebGLTexture> create(WebGLRenderingContextBase*); 47 48 void setTarget(GLenum target, GLint maxLevel); 49 void setParameteri(GLenum pname, GLint param); 50 void setParameterf(GLenum pname, GLfloat param); 51 getTarget()52 GLenum getTarget() const { return m_target; } 53 getMinFilter()54 int getMinFilter() const { return m_minFilter; } 55 56 void setLevelInfo(GLenum target, GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLenum type); 57 58 bool canGenerateMipmaps(); 59 // Generate all level information. 60 void generateMipmapLevelInfo(); 61 62 GLenum getInternalFormat(GLenum target, GLint level) const; 63 GLenum getType(GLenum target, GLint level) const; 64 GLsizei getWidth(GLenum target, GLint level) const; 65 GLsizei getHeight(GLenum target, GLint level) const; 66 bool isValid(GLenum target, GLint level) const; 67 68 // Whether width/height is NotPowerOfTwo. 69 static bool isNPOT(GLsizei, GLsizei); 70 71 bool isNPOT() const; 72 // Determine if texture sampling should always return [0, 0, 0, 1] (OpenGL ES 2.0 Sec 3.8.2). 73 bool needToUseBlackTexture(TextureExtensionFlag) const; 74 hasEverBeenBound()75 bool hasEverBeenBound() const { return object() && m_target; } 76 77 static GLint computeLevelCount(GLsizei width, GLsizei height); 78 79 protected: 80 explicit WebGLTexture(WebGLRenderingContextBase*); 81 82 virtual void deleteObjectImpl(blink::WebGraphicsContext3D*, Platform3DObject) OVERRIDE; 83 84 private: 85 class LevelInfo { 86 public: LevelInfo()87 LevelInfo() 88 : valid(false) 89 , internalFormat(0) 90 , width(0) 91 , height(0) 92 , type(0) 93 { 94 } 95 setInfo(GLenum internalFmt,GLsizei w,GLsizei h,GLenum tp)96 void setInfo(GLenum internalFmt, GLsizei w, GLsizei h, GLenum tp) 97 { 98 valid = true; 99 internalFormat = internalFmt; 100 width = w; 101 height = h; 102 type = tp; 103 } 104 105 bool valid; 106 GLenum internalFormat; 107 GLsizei width; 108 GLsizei height; 109 GLenum type; 110 }; 111 isTexture()112 virtual bool isTexture() const OVERRIDE { return true; } 113 114 void update(); 115 116 int mapTargetToIndex(GLenum) const; 117 118 const LevelInfo* getLevelInfo(GLenum target, GLint level) const; 119 120 GLenum m_target; 121 122 GLenum m_minFilter; 123 GLenum m_magFilter; 124 GLenum m_wrapS; 125 GLenum m_wrapT; 126 127 Vector<Vector<LevelInfo> > m_info; 128 129 bool m_isNPOT; 130 bool m_isCubeComplete; 131 bool m_isComplete; 132 bool m_needToUseBlackTexture; 133 bool m_isFloatType; 134 bool m_isHalfFloatType; 135 }; 136 137 } // namespace blink 138 139 #endif // WebGLTexture_h 140