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/*
* Copyright (C) 2009 Apple 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
* 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 THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_FRAMEBUFFER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_FRAMEBUFFER_H_
#include "third_party/blink/renderer/modules/webgl/webgl_object.h"
#include "third_party/blink/renderer/platform/bindings/name_client.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class WebGLRenderbuffer;
class WebGLTexture;
class WebGLFramebuffer final : public WebGLObject {
DEFINE_WRAPPERTYPEINFO();
public:
class WebGLAttachment : public GarbageCollected<WebGLAttachment>,
public NameClient {
public:
~WebGLAttachment() override = default;
virtual WebGLObject* Object() const = 0;
virtual bool IsObject(WebGLObject*) const = 0;
virtual bool Valid() const = 0;
virtual void OnDetached(gpu::gles2::GLES2Interface*) = 0;
virtual void Attach(gpu::gles2::GLES2Interface*,
GLenum target,
GLenum attachment) = 0;
virtual void Unattach(gpu::gles2::GLES2Interface*,
GLenum target,
GLenum attachment) = 0;
virtual void Trace(Visitor* visitor) const {}
protected:
WebGLAttachment();
};
explicit WebGLFramebuffer(WebGLContextObjectSupport*, bool opaque = false);
~WebGLFramebuffer() override;
// An opaque framebuffer is one whose attachments are created and managed by
// the browser and not inspectable or alterable via Javascript. This is
// primarily used by the VRWebGLLayer interface.
static WebGLFramebuffer* CreateOpaque(WebGLContextObjectSupport*,
bool has_depth,
bool has_stencil);
// For a non-multiview attachment, set the num_views parameter to 0. For a
// multiview attachment, set the layer to the base view index.
void SetAttachmentForBoundFramebuffer(GLenum target,
GLenum attachment,
GLenum tex_target,
WebGLTexture*,
GLint level,
GLint layer,
GLsizei num_views);
void SetAttachmentForBoundFramebuffer(GLenum target,
GLenum attachment,
WebGLRenderbuffer*);
// If an object is attached to the currently bound framebuffer, remove it.
void RemoveAttachmentFromBoundFramebuffer(GLenum target, WebGLObject*);
WebGLObject* GetAttachmentObject(GLenum) const;
// WebGL 1 specific:
// 1) can't allow depth_stencil for depth/stencil attachments, and vice
// versa.
// 2) no conflicting DEPTH/STENCIL/DEPTH_STENCIL attachments.
GLenum CheckDepthStencilStatus(const char** reason) const;
bool HasEverBeenBound() const { return Object() && has_ever_been_bound_; }
void SetHasEverBeenBound() { has_ever_been_bound_ = true; }
bool HasDepthBuffer() const;
bool HasStencilBuffer() const;
bool HaveContentsChanged() { return contents_changed_; }
void SetContentsChanged(bool changed) { contents_changed_ = changed; }
bool Opaque() const { return opaque_; }
void MarkOpaqueBufferComplete(bool complete) { opaque_complete_ = complete; }
void SetOpaqueHasDepth(bool has_depth) { opaque_has_depth_ = has_depth; }
void SetOpaqueHasStencil(bool has_stencil) {
opaque_has_stencil_ = has_stencil;
}
// Wrapper for drawBuffersEXT/drawBuffersARB to work around a driver bug.
void DrawBuffers(const Vector<GLenum>& bufs);
GLenum GetDrawBuffer(GLenum);
// WEBGL_shader_pixel_local_storage.
void SetPLSTexture(GLint plane, WebGLTexture*);
WebGLTexture* GetPLSTexture(GLint plane) const;
void ReadBuffer(const GLenum color_buffer) { read_buffer_ = color_buffer; }
GLenum GetReadBuffer() const { return read_buffer_; }
void Trace(Visitor*) const override;
const char* NameInHeapSnapshot() const override { return "WebGLFramebuffer"; }
protected:
void DeleteObjectImpl(gpu::gles2::GLES2Interface*) override;
private:
WebGLAttachment* GetAttachment(GLenum attachment) const;
// Check if the framebuffer is currently bound.
bool IsBound(GLenum target) const;
// Check if a new drawBuffers call should be issued. This is called when we
// add or remove an attachment.
void DrawBuffersIfNecessary(bool force);
void SetAttachmentInternal(GLenum target,
GLenum attachment,
GLenum tex_target,
WebGLTexture*,
GLint level,
GLint layer);
void SetAttachmentInternal(GLenum target,
GLenum attachment,
WebGLRenderbuffer*);
// If a given attachment point for the currently bound framebuffer is not
// null, remove the attached object.
void RemoveAttachmentInternal(GLenum target, GLenum attachment);
void CommitWebGL1DepthStencilIfConsistent(GLenum target);
typedef HeapHashMap<GLenum, Member<WebGLAttachment>> AttachmentMap;
AttachmentMap attachments_;
bool has_ever_been_bound_;
bool web_gl1_depth_stencil_consistent_;
bool contents_changed_ = false;
const bool opaque_;
bool opaque_has_depth_ = false;
bool opaque_has_stencil_ = false;
bool opaque_complete_ = false;
Vector<GLenum> draw_buffers_;
Vector<GLenum> filtered_draw_buffers_;
// WEBGL_shader_pixel_local_storage.
typedef HeapHashMap<GLint, Member<WebGLTexture>> PLSTextureMap;
PLSTextureMap pls_textures_;
GLenum read_buffer_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_FRAMEBUFFER_H_
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