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1 /* | 1 /* |
2 * Copyright (C) 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2012 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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67 | 67 |
68 // Typedef for server-side objects like OpenGL textures and program objects. | 68 // Typedef for server-side objects like OpenGL textures and program objects. |
69 typedef WGC3Duint WebGLId; | 69 typedef WGC3Duint WebGLId; |
70 | 70 |
71 // This interface abstracts the operations performed by the | 71 // This interface abstracts the operations performed by the |
72 // GraphicsContext3D in order to implement WebGL. Nearly all of the | 72 // GraphicsContext3D in order to implement WebGL. Nearly all of the |
73 // methods exposed on this interface map directly to entry points in | 73 // methods exposed on this interface map directly to entry points in |
74 // the OpenGL ES 2.0 API. | 74 // the OpenGL ES 2.0 API. |
75 class WebGraphicsContext3D : public WebNonCopyable { | 75 class WebGraphicsContext3D : public WebNonCopyable { |
76 public: | 76 public: |
77 // Return value from getActiveUniform and getActiveAttrib. | |
78 struct ActiveInfo { | |
79 WebString name; | |
80 WGC3Denum type; | |
81 WGC3Dint size; | |
82 }; | |
83 | |
84 // Context creation attributes. | 77 // Context creation attributes. |
85 struct Attributes { | 78 struct Attributes { |
86 bool alpha = true; | 79 bool alpha = true; |
87 bool depth = true; | 80 bool depth = true; |
88 bool stencil = true; | 81 bool stencil = true; |
89 bool antialias = true; | 82 bool antialias = true; |
90 bool premultipliedAlpha = true; | 83 bool premultipliedAlpha = true; |
91 bool canRecoverFromContextLoss = true; | 84 bool canRecoverFromContextLoss = true; |
92 bool noExtensions = false; | 85 bool noExtensions = false; |
93 bool shareResources = true; | 86 bool shareResources = true; |
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129 public: | 122 public: |
130 virtual void onErrorMessage(const WebString&, WGC3Dint) = 0; | 123 virtual void onErrorMessage(const WebString&, WGC3Dint) = 0; |
131 | 124 |
132 protected: | 125 protected: |
133 virtual ~WebGraphicsErrorMessageCallback() { } | 126 virtual ~WebGraphicsErrorMessageCallback() { } |
134 }; | 127 }; |
135 | 128 |
136 // This destructor needs to be public so that using classes can destroy inst
ances if initialization fails. | 129 // This destructor needs to be public so that using classes can destroy inst
ances if initialization fails. |
137 virtual ~WebGraphicsContext3D() { } | 130 virtual ~WebGraphicsContext3D() { } |
138 | 131 |
139 // The entry points below map directly to the OpenGL ES 2.0 API. | |
140 // See: http://www.khronos.org/registry/gles/ | |
141 // and: http://www.khronos.org/opengles/sdk/docs/man/ | |
142 virtual bool getActiveAttrib(WebGLId program, WGC3Duint index, ActiveInfo&)
= 0; | |
143 virtual bool getActiveUniform(WebGLId program, WGC3Duint index, ActiveInfo&)
= 0; | |
144 virtual WebString getProgramInfoLog(WebGLId program) = 0; | |
145 virtual WebString getShaderInfoLog(WebGLId shader) = 0; | |
146 virtual WebString getShaderSource(WebGLId shader) = 0; | |
147 | |
148 virtual void setErrorMessageCallback(WebGraphicsErrorMessageCallback* callba
ck) { } | 132 virtual void setErrorMessageCallback(WebGraphicsErrorMessageCallback* callba
ck) { } |
149 | 133 |
150 virtual WebString getTranslatedShaderSourceANGLE(WebGLId shader) = 0; | |
151 | |
152 // Prefer getting a GLES2Interface off WebGraphicsContext3DProvider if possi
ble, and avoid using WebGraphicsContext3D at all. | 134 // Prefer getting a GLES2Interface off WebGraphicsContext3DProvider if possi
ble, and avoid using WebGraphicsContext3D at all. |
153 virtual gpu::gles2::GLES2Interface* getGLES2Interface() = 0; | 135 virtual gpu::gles2::GLES2Interface* getGLES2Interface() = 0; |
154 }; | 136 }; |
155 | 137 |
156 } // namespace blink | 138 } // namespace blink |
157 | 139 |
158 #endif | 140 #endif |
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