292 lines
8.0 KiB
C++
292 lines
8.0 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WebGLBuffer.h"
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#include "GLContext.h"
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#include "mozilla/dom/WebGLRenderingContextBinding.h"
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#include "WebGLContext.h"
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#include "WebGLElementArrayCache.h"
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namespace mozilla {
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WebGLBuffer::WebGLBuffer(WebGLContext* webgl, GLuint buf)
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: WebGLRefCountedObject(webgl)
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, mGLName(buf)
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, mContent(Kind::Undefined)
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, mUsage(LOCAL_GL_STATIC_DRAW)
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, mByteLength(0)
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, mTFBindCount(0)
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, mNonTFBindCount(0)
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{
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mContext->mBuffers.insertBack(this);
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}
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WebGLBuffer::~WebGLBuffer()
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{
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DeleteOnce();
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}
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void
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WebGLBuffer::SetContentAfterBind(GLenum target)
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{
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if (mContent != Kind::Undefined)
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return;
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switch (target) {
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case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
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mContent = Kind::ElementArray;
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if (!mCache) {
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mCache.reset(new WebGLElementArrayCache);
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}
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break;
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case LOCAL_GL_ARRAY_BUFFER:
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case LOCAL_GL_PIXEL_PACK_BUFFER:
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case LOCAL_GL_PIXEL_UNPACK_BUFFER:
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case LOCAL_GL_UNIFORM_BUFFER:
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case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
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case LOCAL_GL_COPY_READ_BUFFER:
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case LOCAL_GL_COPY_WRITE_BUFFER:
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mContent = Kind::OtherData;
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break;
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default:
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MOZ_CRASH("GFX: invalid target");
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}
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}
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void
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WebGLBuffer::Delete()
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{
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mContext->MakeContextCurrent();
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mContext->gl->fDeleteBuffers(1, &mGLName);
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mByteLength = 0;
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mCache = nullptr;
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LinkedListElement<WebGLBuffer>::remove(); // remove from mContext->mBuffers
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}
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////////////////////////////////////////
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static bool
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ValidateBufferUsageEnum(WebGLContext* webgl, const char* funcName, GLenum usage)
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{
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switch (usage) {
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case LOCAL_GL_STREAM_DRAW:
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case LOCAL_GL_STATIC_DRAW:
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case LOCAL_GL_DYNAMIC_DRAW:
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return true;
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case LOCAL_GL_DYNAMIC_COPY:
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case LOCAL_GL_DYNAMIC_READ:
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case LOCAL_GL_STATIC_COPY:
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case LOCAL_GL_STATIC_READ:
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case LOCAL_GL_STREAM_COPY:
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case LOCAL_GL_STREAM_READ:
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if (MOZ_LIKELY(webgl->IsWebGL2()))
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return true;
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break;
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default:
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break;
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}
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webgl->ErrorInvalidEnum("%s: Invalid `usage`: 0x%04x", funcName, usage);
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return false;
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}
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void
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WebGLBuffer::BufferData(GLenum target, size_t size, const void* data, GLenum usage)
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{
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const char funcName[] = "bufferData";
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// Careful: data.Length() could conceivably be any uint32_t, but GLsizeiptr
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// is like intptr_t.
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if (!CheckedInt<GLsizeiptr>(size).isValid())
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return mContext->ErrorOutOfMemory("%s: bad size", funcName);
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if (!ValidateBufferUsageEnum(mContext, funcName, usage))
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return;
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const auto& gl = mContext->gl;
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gl->MakeCurrent();
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const ScopedLazyBind lazyBind(gl, target, this);
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mContext->InvalidateBufferFetching();
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#if defined(XP_MACOSX) || defined(MOZ_WIDGET_GTK)
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// bug 790879
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if (gl->WorkAroundDriverBugs() &&
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size > INT32_MAX)
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{
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mContext->ErrorOutOfMemory("%s: Allocation size too large.", funcName);
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return;
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}
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#endif
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const bool sizeChanges = (size != ByteLength());
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if (sizeChanges) {
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gl::GLContext::LocalErrorScope errorScope(*gl);
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gl->fBufferData(target, size, data, usage);
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const auto error = errorScope.GetError();
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if (error) {
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MOZ_ASSERT(error == LOCAL_GL_OUT_OF_MEMORY);
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mContext->ErrorOutOfMemory("%s: Error from driver: 0x%04x", funcName, error);
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mByteLength = 0;
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return;
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}
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} else {
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gl->fBufferData(target, size, data, usage);
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}
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mUsage = usage;
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mByteLength = size;
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// Warning: Possibly shared memory. See bug 1225033.
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if (!ElementArrayCacheBufferData(data, size)) {
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mByteLength = 0;
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mContext->ErrorOutOfMemory("%s: Failed update index buffer cache.", funcName);
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}
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}
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bool
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WebGLBuffer::ValidateRange(const char* funcName, size_t byteOffset, size_t byteLen) const
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{
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auto availLength = mByteLength;
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if (byteOffset > availLength) {
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mContext->ErrorInvalidValue("%s: Offset passes the end of the buffer.", funcName);
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return false;
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}
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availLength -= byteOffset;
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if (byteLen > availLength) {
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mContext->ErrorInvalidValue("%s: Offset+size passes the end of the buffer.",
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funcName);
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return false;
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}
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return true;
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}
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////////////////////////////////////////
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bool
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WebGLBuffer::ElementArrayCacheBufferData(const void* ptr,
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size_t bufferSizeInBytes)
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{
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if (mContext->IsWebGL2())
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return true;
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if (mContent == Kind::ElementArray)
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return mCache->BufferData(ptr, bufferSizeInBytes);
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return true;
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}
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void
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WebGLBuffer::ElementArrayCacheBufferSubData(size_t pos, const void* ptr,
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size_t updateSizeInBytes)
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{
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if (mContext->IsWebGL2())
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return;
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if (mContent == Kind::ElementArray)
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mCache->BufferSubData(pos, ptr, updateSizeInBytes);
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}
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size_t
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WebGLBuffer::SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const
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{
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size_t sizeOfCache = mCache ? mCache->SizeOfIncludingThis(mallocSizeOf)
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: 0;
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return mallocSizeOf(this) + sizeOfCache;
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}
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bool
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WebGLBuffer::Validate(GLenum type, uint32_t maxAllowed, size_t first, size_t count) const
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{
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if (mContext->IsWebGL2())
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return true;
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return mCache->Validate(type, maxAllowed, first, count);
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}
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bool
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WebGLBuffer::IsElementArrayUsedWithMultipleTypes() const
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{
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if (mContext->IsWebGL2())
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return false;
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return mCache->BeenUsedWithMultipleTypes();
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}
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////
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bool
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WebGLBuffer::ValidateCanBindToTarget(const char* funcName, GLenum target)
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{
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/* https://www.khronos.org/registry/webgl/specs/latest/2.0/#5.1
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*
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* In the WebGL 2 API, buffers have their WebGL buffer type
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* initially set to undefined. Calling bindBuffer, bindBufferRange
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* or bindBufferBase with the target argument set to any buffer
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* binding point except COPY_READ_BUFFER or COPY_WRITE_BUFFER will
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* then set the WebGL buffer type of the buffer being bound
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* according to the table above.
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*
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* Any call to one of these functions which attempts to bind a
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* WebGLBuffer that has the element array WebGL buffer type to a
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* binding point that falls under other data, or bind a
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* WebGLBuffer which has the other data WebGL buffer type to
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* ELEMENT_ARRAY_BUFFER will generate an INVALID_OPERATION error,
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* and the state of the binding point will remain untouched.
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*/
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if (mContent == WebGLBuffer::Kind::Undefined)
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return true;
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switch (target) {
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case LOCAL_GL_COPY_READ_BUFFER:
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case LOCAL_GL_COPY_WRITE_BUFFER:
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return true;
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case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
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if (mContent == WebGLBuffer::Kind::ElementArray)
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return true;
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break;
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case LOCAL_GL_ARRAY_BUFFER:
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case LOCAL_GL_PIXEL_PACK_BUFFER:
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case LOCAL_GL_PIXEL_UNPACK_BUFFER:
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case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
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case LOCAL_GL_UNIFORM_BUFFER:
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if (mContent == WebGLBuffer::Kind::OtherData)
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return true;
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break;
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default:
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MOZ_CRASH();
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}
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const auto dataType = (mContent == WebGLBuffer::Kind::OtherData) ? "other"
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: "element";
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mContext->ErrorInvalidOperation("%s: Buffer already contains %s data.", funcName,
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dataType);
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return false;
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}
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JSObject*
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WebGLBuffer::WrapObject(JSContext* cx, JS::Handle<JSObject*> givenProto)
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{
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return dom::WebGLBufferBinding::Wrap(cx, this, givenProto);
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}
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLBuffer)
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(WebGLBuffer, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(WebGLBuffer, Release)
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} // namespace mozilla
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