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26 #ifndef Extensions3D_h
27 #define Extensions3D_h
29 #include "GraphicsTypes3D.h"
31 #include <wtf/text/WTFString.h>
35 // This is a base class containing only pure virtual functions.
36 // Implementations must provide a subclass.
38 // The supported extensions are defined below and in subclasses,
39 // possibly platform-specific ones.
41 // Calling any extension function not supported by the current context
42 // must be a no-op; in particular, it may not have side effects. In
43 // this situation, if the function has a return value, 0 is returned.
46 virtual ~Extensions3D() {}
48 // Supported extensions:
49 // GL_EXT_texture_format_BGRA8888
50 // GL_EXT_read_format_bgra
52 // GL_ARB_texture_non_power_of_two / GL_OES_texture_npot
53 // GL_EXT_packed_depth_stencil / GL_OES_packed_depth_stencil
54 // GL_ANGLE_framebuffer_blit / GL_ANGLE_framebuffer_multisample
55 // GL_OES_texture_float
56 // GL_OES_standard_derivatives
58 // GL_OES_vertex_array_object
59 // GL_ANGLE_translated_shader_source
60 // GL_ARB_texture_rectangle (only the subset required to
61 // implement IOSurface binding; it's recommended to support
62 // this only on Mac OS X to limit the amount of code dependent
64 // GL_EXT_texture_compression_dxt1
65 // GL_EXT_texture_compression_s3tc
66 // GL_OES_compressed_ETC1_RGB8_texture
67 // GL_IMG_texture_compression_pvrtc
68 // EXT_texture_filter_anisotropic
69 // GL_CHROMIUM_copy_texture
72 // Takes full name of extension; for example,
73 // "GL_EXT_texture_format_BGRA8888".
74 virtual bool supports(const String&) = 0;
76 // Certain OpenGL and WebGL implementations may support enabling
77 // extensions lazily. This method may only be called with
78 // extension names for which supports returns true.
79 virtual void ensureEnabled(const String&) = 0;
81 // Takes full name of extension: for example, "GL_EXT_texture_format_BGRA8888".
82 // Checks to see whether the given extension is actually enabled (see ensureEnabled).
83 // Has no other side-effects.
84 virtual bool isEnabled(const String&) = 0;
86 enum ExtensionsEnumType {
87 // GL_EXT_texture_format_BGRA8888 enums
90 // GL_ARB_robustness enums
91 GUILTY_CONTEXT_RESET_ARB = 0x8253,
92 INNOCENT_CONTEXT_RESET_ARB = 0x8254,
93 UNKNOWN_CONTEXT_RESET_ARB = 0x8255,
95 // GL_EXT/OES_packed_depth_stencil enums
96 DEPTH24_STENCIL8 = 0x88F0,
98 // GL_ANGLE_framebuffer_blit names
99 READ_FRAMEBUFFER = 0x8CA8,
100 DRAW_FRAMEBUFFER = 0x8CA9,
101 DRAW_FRAMEBUFFER_BINDING = 0x8CA6,
102 READ_FRAMEBUFFER_BINDING = 0x8CAA,
104 // GL_ANGLE_framebuffer_multisample names
105 RENDERBUFFER_SAMPLES = 0x8CAB,
106 FRAMEBUFFER_INCOMPLETE_MULTISAMPLE = 0x8D56,
107 MAX_SAMPLES = 0x8D57,
109 // GL_OES_standard_derivatives names
110 FRAGMENT_SHADER_DERIVATIVE_HINT_OES = 0x8B8B,
112 // GL_OES_rgb8_rgba8 names
116 // GL_OES_vertex_array_object names
117 VERTEX_ARRAY_BINDING_OES = 0x85B5,
119 // GL_ANGLE_translated_shader_source
120 TRANSLATED_SHADER_SOURCE_LENGTH_ANGLE = 0x93A0,
122 // GL_ARB_texture_rectangle
123 TEXTURE_RECTANGLE_ARB = 0x84F5,
124 TEXTURE_BINDING_RECTANGLE_ARB = 0x84F6,
126 // GL_EXT_texture_compression_dxt1
127 // GL_EXT_texture_compression_s3tc
128 COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0,
129 COMPRESSED_RGBA_S3TC_DXT1_EXT = 0x83F1,
130 COMPRESSED_RGBA_S3TC_DXT3_EXT = 0x83F2,
131 COMPRESSED_RGBA_S3TC_DXT5_EXT = 0x83F3,
133 // GL_OES_compressed_ETC1_RGB8_texture
134 ETC1_RGB8_OES = 0x8D64,
136 // GL_IMG_texture_compression_pvrtc
137 COMPRESSED_RGB_PVRTC_4BPPV1_IMG = 0x8C00,
138 COMPRESSED_RGB_PVRTC_2BPPV1_IMG = 0x8C01,
139 COMPRESSED_RGBA_PVRTC_4BPPV1_IMG = 0x8C02,
140 COMPRESSED_RGBA_PVRTC_2BPPV1_IMG = 0x8C03,
142 // GL_EXT_texture_filter_anisotropic
143 TEXTURE_MAX_ANISOTROPY_EXT = 0x84FE,
144 MAX_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FF,
147 UNPACK_FLIP_Y_CHROMIUM = 0x9240,
149 // GL_CHROMIUM_copy_texture
150 UNPACK_PREMULTIPLY_ALPHA_CHROMIUM = 0x9241,
151 UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM = 0x9242
155 // Note: This method's behavior differs from the GL_ARB_robustness
156 // specification in the following way:
157 // The implementation must not reset the error state during this call.
158 // If getGraphicsResetStatusARB returns an error, it should continue
159 // returning the same error. Restoring the GraphicsContext3D is handled
161 virtual int getGraphicsResetStatusARB() = 0;
163 // GL_ANGLE_framebuffer_blit
164 virtual void blitFramebuffer(long srcX0, long srcY0, long srcX1, long srcY1, long dstX0, long dstY0, long dstX1, long dstY1, unsigned long mask, unsigned long filter) = 0;
166 // GL_ANGLE_framebuffer_multisample
167 virtual void renderbufferStorageMultisample(unsigned long target, unsigned long samples, unsigned long internalformat, unsigned long width, unsigned long height) = 0;
169 // GL_OES_vertex_array_object
170 virtual Platform3DObject createVertexArrayOES() = 0;
171 virtual void deleteVertexArrayOES(Platform3DObject) = 0;
172 virtual GC3Dboolean isVertexArrayOES(Platform3DObject) = 0;
173 virtual void bindVertexArrayOES(Platform3DObject) = 0;
175 // GL_ANGLE_translated_shader_source
176 virtual String getTranslatedShaderSourceANGLE(Platform3DObject) = 0;
179 // GL_CHROMIUM_copy_texture
180 virtual void copyTextureCHROMIUM(GC3Denum, Platform3DObject, Platform3DObject, GC3Dint, GC3Denum) = 0;
184 } // namespace WebCore
186 #endif // Extensions3D_h