654 lines
19 KiB
C++
654 lines
19 KiB
C++
/* -*- Mode: C++; tab-width: 4; 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 "WebGLContext.h"
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#include "GLContext.h"
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#include "WebGLBuffer.h"
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#include "WebGLVertexArray.h"
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namespace mozilla {
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void
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WebGLContext::UpdateBoundBuffer(GLenum target, WebGLBuffer* buffer)
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{
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WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
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bufferSlot = buffer;
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if (!buffer)
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return;
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buffer->BindTo(target);
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}
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void
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WebGLContext::UpdateBoundBufferIndexed(GLenum target, GLuint index, WebGLBuffer* buffer)
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{
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UpdateBoundBuffer(target, buffer);
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WebGLRefPtr<WebGLBuffer>& bufferIndexSlot =
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GetBufferSlotByTargetIndexed(target, index);
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bufferIndexSlot = buffer;
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}
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void
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WebGLContext::BindBuffer(GLenum target, WebGLBuffer* buffer)
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{
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if (IsContextLost())
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return;
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if (!ValidateObjectAllowDeletedOrNull("bindBuffer", buffer))
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return;
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// silently ignore a deleted buffer
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if (buffer && buffer->IsDeleted())
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return;
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if (!ValidateBufferTarget(target, "bindBuffer"))
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return;
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if (!ValidateBufferForTarget(target, buffer, "bindBuffer"))
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return;
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WebGLContextUnchecked::BindBuffer(target, buffer);
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UpdateBoundBuffer(target, buffer);
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}
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void
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WebGLContext::BindBufferBase(GLenum target, GLuint index, WebGLBuffer* buffer)
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{
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if (IsContextLost())
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return;
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if (!ValidateObjectAllowDeletedOrNull("bindBufferBase", buffer))
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return;
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// silently ignore a deleted buffer
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if (buffer && buffer->IsDeleted())
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return;
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// ValidateBufferTarget
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switch (target) {
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case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
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if (index >= mGLMaxTransformFeedbackSeparateAttribs)
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return ErrorInvalidValue("bindBufferBase: index should be less than "
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"MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS");
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break;
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case LOCAL_GL_UNIFORM_BUFFER:
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if (index >= mGLMaxUniformBufferBindings)
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return ErrorInvalidValue("bindBufferBase: index should be less than "
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"MAX_UNIFORM_BUFFER_BINDINGS");
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break;
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default:
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return ErrorInvalidEnumInfo("bindBufferBase: target", target);
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}
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if (!ValidateBufferForTarget(target, buffer, "bindBufferBase"))
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return;
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WebGLContextUnchecked::BindBufferBase(target, index, buffer);
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UpdateBoundBufferIndexed(target, index, buffer);
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}
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void
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WebGLContext::BindBufferRange(GLenum target, GLuint index, WebGLBuffer* buffer,
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WebGLintptr offset, WebGLsizeiptr size)
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{
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if (IsContextLost())
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return;
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if (!ValidateObjectAllowDeletedOrNull("bindBufferRange", buffer))
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return;
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// silently ignore a deleted buffer
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if (buffer && buffer->IsDeleted())
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return;
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// ValidateBufferTarget
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switch (target) {
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case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
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if (index >= mGLMaxTransformFeedbackSeparateAttribs)
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return ErrorInvalidValue("bindBufferRange: index should be less than "
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"MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS");
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break;
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case LOCAL_GL_UNIFORM_BUFFER:
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if (index >= mGLMaxUniformBufferBindings)
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return ErrorInvalidValue("bindBufferRange: index should be less than "
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"MAX_UNIFORM_BUFFER_BINDINGS");
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break;
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default:
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return ErrorInvalidEnumInfo("bindBufferRange: target", target);
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}
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if (!ValidateBufferForTarget(target, buffer, "bindBufferRange"))
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return;
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WebGLContextUnchecked::BindBufferRange(target, index, buffer, offset, size);
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UpdateBoundBufferIndexed(target, index, buffer);
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}
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void
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WebGLContext::BufferData(GLenum target, WebGLsizeiptr size, GLenum usage)
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{
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if (IsContextLost())
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return;
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if (!ValidateBufferTarget(target, "bufferData"))
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return;
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WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
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if (size < 0)
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return ErrorInvalidValue("bufferData: negative size");
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if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
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return;
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// careful: WebGLsizeiptr is always 64-bit, but GLsizeiptr is like intptr_t.
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if (!CheckedInt<GLsizeiptr>(size).isValid())
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return ErrorOutOfMemory("bufferData: bad size");
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WebGLBuffer* boundBuffer = bufferSlot.get();
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if (!boundBuffer)
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return ErrorInvalidOperation("bufferData: no buffer bound!");
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UniquePtr<uint8_t> zeroBuffer((uint8_t*)calloc(size, 1));
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if (!zeroBuffer)
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return ErrorOutOfMemory("bufferData: out of memory");
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MakeContextCurrent();
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InvalidateBufferFetching();
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GLenum error = CheckedBufferData(target, size, zeroBuffer.get(), usage);
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if (error) {
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GenerateWarning("bufferData generated error %s", ErrorName(error));
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return;
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}
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boundBuffer->SetByteLength(size);
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if (!boundBuffer->ElementArrayCacheBufferData(nullptr, size)) {
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boundBuffer->SetByteLength(0);
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return ErrorOutOfMemory("bufferData: out of memory");
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}
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}
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// BufferT may be one of
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// const dom::ArrayBuffer&
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// const dom::SharedArrayBuffer&
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// const dom::ArrayBufferView&
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template<typename BufferT>
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void
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WebGLContext::BufferDataT(GLenum target,
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const BufferT& data,
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GLenum usage)
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{
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if (IsContextLost())
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return;
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if (!ValidateBufferTarget(target, "bufferData"))
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return;
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const WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
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data.ComputeLengthAndData();
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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>(data.LengthAllowShared()).isValid())
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return ErrorOutOfMemory("bufferData: bad size");
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if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
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return;
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WebGLBuffer* boundBuffer = bufferSlot.get();
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if (!boundBuffer)
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return ErrorInvalidOperation("bufferData: no buffer bound!");
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MakeContextCurrent();
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InvalidateBufferFetching();
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// Warning: Possibly shared memory. See bug 1225033.
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GLenum error = CheckedBufferData(target, data.LengthAllowShared(), data.DataAllowShared(), usage);
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if (error) {
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GenerateWarning("bufferData generated error %s", ErrorName(error));
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return;
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}
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boundBuffer->SetByteLength(data.LengthAllowShared());
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// Warning: Possibly shared memory. See bug 1225033.
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if (!boundBuffer->ElementArrayCacheBufferData(data.DataAllowShared(), data.LengthAllowShared())) {
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boundBuffer->SetByteLength(0);
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return ErrorOutOfMemory("bufferData: out of memory");
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}
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}
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void
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WebGLContext::BufferData(GLenum target,
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const dom::SharedArrayBuffer& data,
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GLenum usage)
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{
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BufferDataT(target, data, usage);
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}
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void
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WebGLContext::BufferData(GLenum target,
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const dom::Nullable<dom::ArrayBuffer>& maybeData,
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GLenum usage)
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{
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if (maybeData.IsNull()) {
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// see http://www.khronos.org/bugzilla/show_bug.cgi?id=386
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return ErrorInvalidValue("bufferData: null object passed");
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}
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BufferDataT(target, maybeData.Value(), usage);
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}
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void
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WebGLContext::BufferData(GLenum target, const dom::ArrayBufferView& data,
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GLenum usage)
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{
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BufferDataT(target, data, usage);
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}
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// BufferT may be one of
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// const dom::ArrayBuffer&
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// const dom::SharedArrayBuffer&
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// const dom::ArrayBufferView&
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template<typename BufferT>
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void
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WebGLContext::BufferSubDataT(GLenum target,
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WebGLsizeiptr byteOffset,
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const BufferT& data)
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{
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if (IsContextLost())
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return;
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if (!ValidateBufferTarget(target, "bufferSubData"))
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return;
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WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
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if (byteOffset < 0)
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return ErrorInvalidValue("bufferSubData: negative offset");
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WebGLBuffer* boundBuffer = bufferSlot.get();
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if (!boundBuffer)
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return ErrorInvalidOperation("bufferData: no buffer bound!");
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data.ComputeLengthAndData();
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CheckedInt<WebGLsizeiptr> checked_neededByteLength =
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CheckedInt<WebGLsizeiptr>(byteOffset) + data.LengthAllowShared();
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if (!checked_neededByteLength.isValid()) {
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ErrorInvalidValue("bufferSubData: Integer overflow computing the needed"
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" byte length.");
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return;
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}
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if (checked_neededByteLength.value() > boundBuffer->ByteLength()) {
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ErrorInvalidValue("bufferSubData: Not enough data. Operation requires"
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" %d bytes, but buffer only has %d bytes.",
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checked_neededByteLength.value(),
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boundBuffer->ByteLength());
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return;
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}
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// Warning: Possibly shared memory. See bug 1225033.
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boundBuffer->ElementArrayCacheBufferSubData(byteOffset, data.DataAllowShared(),
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data.LengthAllowShared());
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MakeContextCurrent();
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// Warning: Possibly shared memory. See bug 1225033.
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gl->fBufferSubData(target, byteOffset, data.LengthAllowShared(), data.DataAllowShared());
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}
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void
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WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
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const dom::Nullable<dom::ArrayBuffer>& maybeData)
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{
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if (maybeData.IsNull()) {
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// see http://www.khronos.org/bugzilla/show_bug.cgi?id=386
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return;
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}
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BufferSubDataT(target, byteOffset, maybeData.Value());
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}
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void
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WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
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const dom::SharedArrayBuffer& data)
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{
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BufferSubDataT(target, byteOffset, data);
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}
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void
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WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
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const dom::ArrayBufferView& data)
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{
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BufferSubDataT(target, byteOffset, data);
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}
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already_AddRefed<WebGLBuffer>
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WebGLContext::CreateBuffer()
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{
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if (IsContextLost())
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return nullptr;
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GLuint buf = 0;
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MakeContextCurrent();
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gl->fGenBuffers(1, &buf);
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RefPtr<WebGLBuffer> globj = new WebGLBuffer(this, buf);
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return globj.forget();
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}
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void
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WebGLContext::DeleteBuffer(WebGLBuffer* buffer)
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{
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if (IsContextLost())
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return;
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if (!ValidateObjectAllowDeletedOrNull("deleteBuffer", buffer))
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return;
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if (!buffer || buffer->IsDeleted())
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return;
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// TODO: Extract this into a helper function?
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if (mBoundArrayBuffer == buffer) {
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WebGLContextUnchecked::BindBuffer(LOCAL_GL_ARRAY_BUFFER, nullptr);
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mBoundArrayBuffer = nullptr;
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}
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if (mBoundVertexArray->mElementArrayBuffer == buffer) {
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WebGLContextUnchecked::BindBuffer(LOCAL_GL_ELEMENT_ARRAY_BUFFER, nullptr);
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mBoundVertexArray->mElementArrayBuffer = nullptr;
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}
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// WebGL binding points
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if (IsWebGL2()) {
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if (mBoundCopyReadBuffer == buffer)
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mBoundCopyReadBuffer = nullptr;
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if (mBoundCopyWriteBuffer == buffer)
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mBoundCopyWriteBuffer = nullptr;
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if (mBoundPixelPackBuffer == buffer)
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mBoundPixelPackBuffer = nullptr;
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if (mBoundPixelUnpackBuffer == buffer)
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mBoundPixelUnpackBuffer = nullptr;
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if (mBoundTransformFeedbackBuffer == buffer)
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mBoundTransformFeedbackBuffer = nullptr;
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if (mBoundUniformBuffer == buffer)
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mBoundUniformBuffer = nullptr;
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const size_t xfBufferCount = mBoundTransformFeedbackBuffers.Length();
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for (size_t n = 0; n < xfBufferCount; n++) {
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if (mBoundTransformFeedbackBuffers[n] == buffer) {
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mBoundTransformFeedbackBuffers[n] = nullptr;
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}
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}
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const size_t uniformBufferCount = mBoundUniformBuffers.Length();
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for (size_t n = 0; n < uniformBufferCount; n++) {
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if (mBoundUniformBuffers[n] == buffer) {
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mBoundUniformBuffers[n] = nullptr;
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}
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}
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}
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for (int32_t i = 0; i < mGLMaxVertexAttribs; i++) {
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if (mBoundVertexArray->HasAttrib(i) &&
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mBoundVertexArray->mAttribs[i].buf == buffer)
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{
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mBoundVertexArray->mAttribs[i].buf = nullptr;
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}
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}
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buffer->RequestDelete();
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}
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bool
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WebGLContext::IsBuffer(WebGLBuffer* buffer)
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{
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if (IsContextLost())
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return false;
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if (!ValidateObjectAllowDeleted("isBuffer", buffer))
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return false;
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if (buffer->IsDeleted())
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return false;
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MakeContextCurrent();
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return gl->fIsBuffer(buffer->mGLName);
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}
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bool
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WebGLContext::ValidateBufferForTarget(GLenum target, WebGLBuffer* buffer,
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const char* info)
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{
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if (!buffer)
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return true;
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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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GLenum boundTo = GetCurrentBinding(buffer);
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if (boundTo != LOCAL_GL_NONE) {
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if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER &&
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boundTo != LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER)
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{
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ErrorInvalidOperation("Can't bind buffer to TRANSFORM_FEEDBACK_BUFFER as the "
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"buffer is already bound to another bind point.");
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return false;
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}
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else if (target != LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER &&
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boundTo == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER)
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{
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ErrorInvalidOperation("Can't bind buffer to bind point as it is currently "
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"bound to TRANSFORM_FEEDBACK_BUFFER.");
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return false;
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}
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}
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WebGLBuffer::Kind content = buffer->Content();
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if (content == 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 (content == 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 (content == 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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ErrorInvalidOperation("%s: buffer already contains %s data.", info,
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content == WebGLBuffer::Kind::OtherData ? "other" : "element");
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return false;
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}
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bool
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WebGLContext::ValidateBufferUsageEnum(GLenum target, const char* info)
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{
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switch (target) {
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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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default:
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break;
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}
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ErrorInvalidEnumInfo(info, target);
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return false;
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}
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WebGLRefPtr<WebGLBuffer>&
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WebGLContext::GetBufferSlotByTarget(GLenum target)
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{
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/* This function assumes that target has been validated for either
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* WebGL1 or WebGL2.
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*/
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switch (target) {
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case LOCAL_GL_ARRAY_BUFFER:
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return mBoundArrayBuffer;
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case LOCAL_GL_COPY_READ_BUFFER:
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return mBoundCopyReadBuffer;
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case LOCAL_GL_COPY_WRITE_BUFFER:
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return mBoundCopyWriteBuffer;
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case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
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return mBoundVertexArray->mElementArrayBuffer;
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case LOCAL_GL_PIXEL_PACK_BUFFER:
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return mBoundPixelPackBuffer;
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case LOCAL_GL_PIXEL_UNPACK_BUFFER:
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return mBoundPixelUnpackBuffer;
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case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
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return mBoundTransformFeedbackBuffer;
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case LOCAL_GL_UNIFORM_BUFFER:
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return mBoundUniformBuffer;
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default:
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|
MOZ_CRASH("Should not get here.");
|
|
}
|
|
}
|
|
|
|
WebGLRefPtr<WebGLBuffer>&
|
|
WebGLContext::GetBufferSlotByTargetIndexed(GLenum target, GLuint index)
|
|
{
|
|
/* This function assumes that target has been validated for either WebGL1 or WebGL. */
|
|
switch (target) {
|
|
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
|
|
MOZ_ASSERT(index < mGLMaxTransformFeedbackSeparateAttribs);
|
|
return mBoundTransformFeedbackBuffers[index];
|
|
|
|
case LOCAL_GL_UNIFORM_BUFFER:
|
|
MOZ_ASSERT(index < mGLMaxUniformBufferBindings);
|
|
return mBoundUniformBuffers[index];
|
|
|
|
default:
|
|
MOZ_CRASH("Should not get here.");
|
|
}
|
|
}
|
|
|
|
GLenum
|
|
WebGLContext::GetCurrentBinding(WebGLBuffer* buffer) const
|
|
{
|
|
if (mBoundArrayBuffer == buffer)
|
|
return LOCAL_GL_ARRAY_BUFFER;
|
|
|
|
if (mBoundCopyReadBuffer == buffer)
|
|
return LOCAL_GL_COPY_READ_BUFFER;
|
|
|
|
if (mBoundCopyWriteBuffer == buffer)
|
|
return LOCAL_GL_COPY_WRITE_BUFFER;
|
|
|
|
if (mBoundPixelPackBuffer == buffer)
|
|
return LOCAL_GL_PIXEL_PACK_BUFFER;
|
|
|
|
if (mBoundPixelUnpackBuffer == buffer)
|
|
return LOCAL_GL_PIXEL_UNPACK_BUFFER;
|
|
|
|
if (mBoundTransformFeedbackBuffer == buffer ||
|
|
mBoundTransformFeedbackBuffers.Contains(buffer)) {
|
|
return LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER;
|
|
}
|
|
|
|
if (mBoundUniformBuffer == buffer ||
|
|
mBoundUniformBuffers.Contains(buffer)) {
|
|
return LOCAL_GL_UNIFORM_BUFFER;
|
|
}
|
|
|
|
return LOCAL_GL_NONE;
|
|
}
|
|
|
|
GLenum
|
|
WebGLContext::CheckedBufferData(GLenum target, GLsizeiptr size,
|
|
const GLvoid* data, GLenum usage)
|
|
{
|
|
#if(0)
|
|
#ifdef XP_MACOSX
|
|
// bug 790879
|
|
if (gl->WorkAroundDriverBugs() &&
|
|
int64_t(size) > INT32_MAX) // cast avoids a potential always-true warning on 32bit
|
|
{
|
|
GenerateWarning("Rejecting valid bufferData call with size %lu to avoid"
|
|
" a Mac bug", size);
|
|
return LOCAL_GL_INVALID_VALUE;
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
WebGLRefPtr<WebGLBuffer>& bufferSlot = GetBufferSlotByTarget(target);
|
|
WebGLBuffer* boundBuffer = bufferSlot.get();
|
|
MOZ_ASSERT(boundBuffer, "No buffer bound for this target.");
|
|
|
|
bool sizeChanges = uint32_t(size) != boundBuffer->ByteLength();
|
|
if (sizeChanges) {
|
|
GetAndFlushUnderlyingGLErrors();
|
|
gl->fBufferData(target, size, data, usage);
|
|
GLenum error = GetAndFlushUnderlyingGLErrors();
|
|
return error;
|
|
} else {
|
|
gl->fBufferData(target, size, data, usage);
|
|
return LOCAL_GL_NO_ERROR;
|
|
}
|
|
}
|
|
|
|
} // namespace mozilla
|