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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef Extensions3D_h
#define Extensions3D_h
#include "GraphicsTypes3D.h"
#include <wtf/text/WTFString.h>
namespace WebCore {
// This is a base class containing only pure virtual functions.
// Implementations must provide a subclass.
//
// The supported extensions are defined below and in subclasses,
// possibly platform-specific ones.
//
// Calling any extension function not supported by the current context
// must be a no-op; in particular, it may not have side effects. In
// this situation, if the function has a return value, 0 is returned.
class Extensions3D {
public:
virtual ~Extensions3D() {}
// Supported extensions:
// GL_EXT_texture_format_BGRA8888
// GL_EXT_read_format_bgra
// GL_ARB_robustness
// GL_ARB_texture_non_power_of_two / GL_OES_texture_npot
// GL_EXT_packed_depth_stencil / GL_OES_packed_depth_stencil
// GL_ANGLE_framebuffer_blit / GL_ANGLE_framebuffer_multisample
// GL_OES_texture_float
// GL_OES_standard_derivatives
// GL_OES_rgb8_rgba8
// GL_OES_vertex_array_object
// Takes full name of extension; for example,
// "GL_EXT_texture_format_BGRA8888".
virtual bool supports(const String&) = 0;
// Certain OpenGL and WebGL implementations may support enabling
// extensions lazily. This method may only be called with
// extension names for which supports returns true.
virtual void ensureEnabled(const String&) = 0;
// Takes full name of extension: for example, "GL_EXT_texture_format_BGRA8888".
// Checks to see whether the given extension is actually enabled (see ensureEnabled).
// Has no other side-effects.
virtual bool isEnabled(const String&) = 0;
enum ExtensionsEnumType {
// GL_EXT_texture_format_BGRA8888 enums
BGRA_EXT = 0x80E1,
// GL_ARB_robustness enums
GUILTY_CONTEXT_RESET_ARB = 0x8253,
INNOCENT_CONTEXT_RESET_ARB = 0x8254,
UNKNOWN_CONTEXT_RESET_ARB = 0x8255,
// GL_EXT/OES_packed_depth_stencil enums
DEPTH24_STENCIL8 = 0x88F0,
// GL_ANGLE_framebuffer_blit names
READ_FRAMEBUFFER = 0x8CA8,
DRAW_FRAMEBUFFER = 0x8CA9,
DRAW_FRAMEBUFFER_BINDING = 0x8CA6,
READ_FRAMEBUFFER_BINDING = 0x8CAA,
// GL_ANGLE_framebuffer_multisample names
RENDERBUFFER_SAMPLES = 0x8CAB,
FRAMEBUFFER_INCOMPLETE_MULTISAMPLE = 0x8D56,
MAX_SAMPLES = 0x8D57,
// GL_OES_standard_derivatives names
FRAGMENT_SHADER_DERIVATIVE_HINT_OES = 0x8B8B,
// GL_OES_rgb8_rgba8 names
RGB8_OES = 0x8051,
RGBA8_OES = 0x8058,
// GL_OES_vertex_array_object names
VERTEX_ARRAY_BINDING_OES = 0x85B5,
};
// GL_ARB_robustness
virtual int getGraphicsResetStatusARB() = 0;
// GL_ANGLE_framebuffer_blit
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;
// GL_ANGLE_framebuffer_multisample
virtual void renderbufferStorageMultisample(unsigned long target, unsigned long samples, unsigned long internalformat, unsigned long width, unsigned long height) = 0;
// GL_OES_vertex_array_object
virtual Platform3DObject createVertexArrayOES() = 0;
virtual void deleteVertexArrayOES(Platform3DObject) = 0;
virtual GC3Dboolean isVertexArrayOES(Platform3DObject) = 0;
virtual void bindVertexArrayOES(Platform3DObject) = 0;
};
} // namespace WebCore
#endif // Extensions3D_h
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