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      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 
     52     GLenum getTarget() const { return m_target; }
     53 
     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 
     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:
     87         LevelInfo()
     88             : valid(false)
     89             , internalFormat(0)
     90             , width(0)
     91             , height(0)
     92             , type(0)
     93         {
     94         }
     95 
     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 
    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