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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
70 // Takes full name of extension; for example,
71 // "GL_EXT_texture_format_BGRA8888".
72 virtual bool supports(const String&) = 0;
74 // Certain OpenGL and WebGL implementations may support enabling
75 // extensions lazily. This method may only be called with
76 // extension names for which supports returns true.
77 virtual void ensureEnabled(const String&) = 0;
79 // Takes full name of extension: for example, "GL_EXT_texture_format_BGRA8888".
80 // Checks to see whether the given extension is actually enabled (see ensureEnabled).
81 // Has no other side-effects.
82 virtual bool isEnabled(const String&) = 0;
84 enum ExtensionsEnumType {
85 // GL_EXT_texture_format_BGRA8888 enums
88 // GL_ARB_robustness enums
89 GUILTY_CONTEXT_RESET_ARB = 0x8253,
90 INNOCENT_CONTEXT_RESET_ARB = 0x8254,
91 UNKNOWN_CONTEXT_RESET_ARB = 0x8255,
93 // GL_EXT/OES_packed_depth_stencil enums
94 DEPTH24_STENCIL8 = 0x88F0,
96 // GL_ANGLE_framebuffer_blit names
97 READ_FRAMEBUFFER = 0x8CA8,
98 DRAW_FRAMEBUFFER = 0x8CA9,
99 DRAW_FRAMEBUFFER_BINDING = 0x8CA6,
100 READ_FRAMEBUFFER_BINDING = 0x8CAA,
102 // GL_ANGLE_framebuffer_multisample names
103 RENDERBUFFER_SAMPLES = 0x8CAB,
104 FRAMEBUFFER_INCOMPLETE_MULTISAMPLE = 0x8D56,
105 MAX_SAMPLES = 0x8D57,
107 // GL_OES_standard_derivatives names
108 FRAGMENT_SHADER_DERIVATIVE_HINT_OES = 0x8B8B,
110 // GL_OES_rgb8_rgba8 names
114 // GL_OES_vertex_array_object names
115 VERTEX_ARRAY_BINDING_OES = 0x85B5,
117 // GL_ANGLE_translated_shader_source
118 TRANSLATED_SHADER_SOURCE_LENGTH_ANGLE = 0x93A0,
120 // GL_ARB_texture_rectangle
121 TEXTURE_RECTANGLE_ARB = 0x84F5,
122 TEXTURE_BINDING_RECTANGLE_ARB = 0x84F6,
124 // GL_EXT_texture_compression_dxt1
125 // GL_EXT_texture_compression_s3tc
126 COMPRESSED_RGB_S3TC_DXT1_EXT = 0x83F0,
127 COMPRESSED_RGBA_S3TC_DXT1_EXT = 0x83F1,
128 COMPRESSED_RGBA_S3TC_DXT3_EXT = 0x83F2,
129 COMPRESSED_RGBA_S3TC_DXT5_EXT = 0x83F3,
131 // GL_OES_compressed_ETC1_RGB8_texture
132 ETC1_RGB8_OES = 0x8D64,
134 // GL_IMG_texture_compression_pvrtc
135 COMPRESSED_RGB_PVRTC_4BPPV1_IMG = 0x8C00,
136 COMPRESSED_RGB_PVRTC_2BPPV1_IMG = 0x8C01,
137 COMPRESSED_RGBA_PVRTC_4BPPV1_IMG = 0x8C02,
138 COMPRESSED_RGBA_PVRTC_2BPPV1_IMG = 0x8C03,
140 // GL_EXT_texture_filter_anisotropic
141 TEXTURE_MAX_ANISOTROPY_EXT = 0x84FE,
142 MAX_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FF,
146 // Note: This method's behavior differs from the GL_ARB_robustness
147 // specification in the following way:
148 // The implementation must not reset the error state during this call.
149 // If getGraphicsResetStatusARB returns an error, it should continue
150 // returning the same error. Restoring the GraphicsContext3D is handled
152 virtual int getGraphicsResetStatusARB() = 0;
154 // GL_ANGLE_framebuffer_blit
155 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;
157 // GL_ANGLE_framebuffer_multisample
158 virtual void renderbufferStorageMultisample(unsigned long target, unsigned long samples, unsigned long internalformat, unsigned long width, unsigned long height) = 0;
160 // GL_OES_vertex_array_object
161 virtual Platform3DObject createVertexArrayOES() = 0;
162 virtual void deleteVertexArrayOES(Platform3DObject) = 0;
163 virtual GC3Dboolean isVertexArrayOES(Platform3DObject) = 0;
164 virtual void bindVertexArrayOES(Platform3DObject) = 0;
166 // GL_ANGLE_translated_shader_source
167 virtual String getTranslatedShaderSourceANGLE(Platform3DObject) = 0;
170 } // namespace WebCore
172 #endif // Extensions3D_h