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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
60 // Takes full name of extension; for example,
61 // "GL_EXT_texture_format_BGRA8888".
62 virtual bool supports(const String&) = 0;
64 // Certain OpenGL and WebGL implementations may support enabling
65 // extensions lazily. This method may only be called with
66 // extension names for which supports returns true.
67 virtual void ensureEnabled(const String&) = 0;
69 // Takes full name of extension: for example, "GL_EXT_texture_format_BGRA8888".
70 // Checks to see whether the given extension is actually enabled (see ensureEnabled).
71 // Has no other side-effects.
72 virtual bool isEnabled(const String&) = 0;
74 enum ExtensionsEnumType {
75 // GL_EXT_texture_format_BGRA8888 enums
78 // GL_ARB_robustness enums
79 GUILTY_CONTEXT_RESET_ARB = 0x8253,
80 INNOCENT_CONTEXT_RESET_ARB = 0x8254,
81 UNKNOWN_CONTEXT_RESET_ARB = 0x8255,
83 // GL_EXT/OES_packed_depth_stencil enums
84 DEPTH24_STENCIL8 = 0x88F0,
86 // GL_ANGLE_framebuffer_blit names
87 READ_FRAMEBUFFER = 0x8CA8,
88 DRAW_FRAMEBUFFER = 0x8CA9,
89 DRAW_FRAMEBUFFER_BINDING = 0x8CA6,
90 READ_FRAMEBUFFER_BINDING = 0x8CAA,
92 // GL_ANGLE_framebuffer_multisample names
93 RENDERBUFFER_SAMPLES = 0x8CAB,
94 FRAMEBUFFER_INCOMPLETE_MULTISAMPLE = 0x8D56,
97 // GL_OES_standard_derivatives names
98 FRAGMENT_SHADER_DERIVATIVE_HINT_OES = 0x8B8B,
100 // GL_OES_rgb8_rgba8 names
104 // GL_OES_vertex_array_object names
105 VERTEX_ARRAY_BINDING_OES = 0x85B5,
109 virtual int getGraphicsResetStatusARB() = 0;
111 // GL_ANGLE_framebuffer_blit
112 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;
114 // GL_ANGLE_framebuffer_multisample
115 virtual void renderbufferStorageMultisample(unsigned long target, unsigned long samples, unsigned long internalformat, unsigned long width, unsigned long height) = 0;
117 // GL_OES_vertex_array_object
118 virtual Platform3DObject createVertexArrayOES() = 0;
119 virtual void deleteVertexArrayOES(Platform3DObject) = 0;
120 virtual GC3Dboolean isVertexArrayOES(Platform3DObject) = 0;
121 virtual void bindVertexArrayOES(Platform3DObject) = 0;
124 } // namespace WebCore
126 #endif // Extensions3D_h