gecko-dev/dom/canvas/WebGLContextBuffers.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGLContext.h"
#include "GLContext.h"
#include "WebGLBuffer.h"
#include "WebGLVertexArray.h"
using namespace mozilla;
using namespace mozilla::dom;
void
WebGLContext::BindBuffer(GLenum target, WebGLBuffer *buffer)
{
if (IsContextLost())
return;
if (!ValidateObjectAllowDeletedOrNull("bindBuffer", buffer))
return;
// silently ignore a deleted buffer
if (buffer && buffer->IsDeleted())
return;
WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bindBuffer");
if (!bufferSlot) {
return;
}
if (buffer) {
if (!buffer->HasEverBeenBound()) {
buffer->BindTo(target);
} else if (target != buffer->Target()) {
return ErrorInvalidOperation("bindBuffer: buffer already bound to a different target");
}
}
*bufferSlot = buffer;
MakeContextCurrent();
gl->fBindBuffer(target, buffer ? buffer->GLName() : 0);
}
void
WebGLContext::BindBufferBase(GLenum target, GLuint index, WebGLBuffer* buffer)
{
if (IsContextLost())
return;
if (!ValidateObjectAllowDeletedOrNull("bindBufferBase", buffer))
return;
// silently ignore a deleted buffer
if (buffer && buffer->IsDeleted()) {
return;
}
WebGLRefPtr<WebGLBuffer>* indexedBufferSlot = GetBufferSlotByTargetIndexed(target, index, "bindBufferBase");
if (!indexedBufferSlot) {
return;
}
if (buffer) {
if (!buffer->HasEverBeenBound())
buffer->BindTo(target);
if (target != buffer->Target())
return ErrorInvalidOperation("bindBuffer: buffer already bound to a different target");
}
WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bindBuffer");
MOZ_ASSERT(bufferSlot, "GetBufferSlotByTarget(Indexed) mismatch");
*indexedBufferSlot = buffer;
*bufferSlot = buffer;
MakeContextCurrent();
gl->fBindBufferBase(target, index, buffer ? buffer->GLName() : 0);
}
void
WebGLContext::BindBufferRange(GLenum target, GLuint index, WebGLBuffer* buffer,
WebGLintptr offset, WebGLsizeiptr size)
{
if (IsContextLost())
return;
if (!ValidateObjectAllowDeletedOrNull("bindBufferRange", buffer))
return;
// silently ignore a deleted buffer
if (buffer && buffer->IsDeleted())
return;
WebGLRefPtr<WebGLBuffer>* indexedBufferSlot = GetBufferSlotByTargetIndexed(target, index, "bindBufferBase");
if (!indexedBufferSlot) {
return;
}
if (buffer) {
if (!buffer->HasEverBeenBound())
buffer->BindTo(target);
if (target != buffer->Target())
return ErrorInvalidOperation("bindBuffer: buffer already bound to a different target");
CheckedInt<WebGLsizeiptr> checked_neededByteLength = CheckedInt<WebGLsizeiptr>(offset) + size;
if (!checked_neededByteLength.isValid() ||
checked_neededByteLength.value() > buffer->ByteLength())
{
return ErrorInvalidValue("bindBufferRange: invalid range");
}
}
WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bindBuffer");
MOZ_ASSERT(bufferSlot, "GetBufferSlotByTarget(Indexed) mismatch");
*indexedBufferSlot = buffer;
*bufferSlot = buffer;
MakeContextCurrent();
gl->fBindBufferRange(target, index, buffer ? buffer->GLName() : 0, offset, size);
}
void
WebGLContext::BufferData(GLenum target, WebGLsizeiptr size,
GLenum usage)
{
if (IsContextLost())
return;
WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferData");
if (!bufferSlot) {
return;
}
if (size < 0)
return ErrorInvalidValue("bufferData: negative size");
if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
return;
// careful: WebGLsizeiptr is always 64-bit, but GLsizeiptr is like intptr_t.
if (!CheckedInt<GLsizeiptr>(size).isValid())
return ErrorOutOfMemory("bufferData: bad size");
WebGLBuffer* boundBuffer = bufferSlot->get();
if (!boundBuffer)
return ErrorInvalidOperation("bufferData: no buffer bound!");
void* zeroBuffer = calloc(size, 1);
if (!zeroBuffer)
return ErrorOutOfMemory("bufferData: out of memory");
MakeContextCurrent();
InvalidateBufferFetching();
GLenum error = CheckedBufferData(target, size, zeroBuffer, usage);
free(zeroBuffer);
if (error) {
GenerateWarning("bufferData generated error %s", ErrorName(error));
return;
}
boundBuffer->SetByteLength(size);
if (!boundBuffer->ElementArrayCacheBufferData(nullptr, size)) {
return ErrorOutOfMemory("bufferData: out of memory");
}
}
void
WebGLContext::BufferData(GLenum target,
const Nullable<ArrayBuffer> &maybeData,
GLenum usage)
{
if (IsContextLost())
return;
if (maybeData.IsNull()) {
// see http://www.khronos.org/bugzilla/show_bug.cgi?id=386
return ErrorInvalidValue("bufferData: null object passed");
}
WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferData");
if (!bufferSlot) {
return;
}
const ArrayBuffer& data = maybeData.Value();
data.ComputeLengthAndData();
// Careful: data.Length() could conceivably be any uint32_t, but GLsizeiptr
// is like intptr_t.
if (!CheckedInt<GLsizeiptr>(data.Length()).isValid())
return ErrorOutOfMemory("bufferData: bad size");
if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
return;
WebGLBuffer* boundBuffer = bufferSlot->get();
if (!boundBuffer)
return ErrorInvalidOperation("bufferData: no buffer bound!");
MakeContextCurrent();
InvalidateBufferFetching();
GLenum error = CheckedBufferData(target, data.Length(), data.Data(), usage);
if (error) {
GenerateWarning("bufferData generated error %s", ErrorName(error));
return;
}
boundBuffer->SetByteLength(data.Length());
if (!boundBuffer->ElementArrayCacheBufferData(data.Data(), data.Length())) {
return ErrorOutOfMemory("bufferData: out of memory");
}
}
void
WebGLContext::BufferData(GLenum target, const ArrayBufferView& data,
GLenum usage)
{
if (IsContextLost())
return;
WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferSubData");
if (!bufferSlot) {
return;
}
if (!ValidateBufferUsageEnum(usage, "bufferData: usage"))
return;
WebGLBuffer* boundBuffer = bufferSlot->get();
if (!boundBuffer)
return ErrorInvalidOperation("bufferData: no buffer bound!");
data.ComputeLengthAndData();
// Careful: data.Length() could conceivably be any uint32_t, but GLsizeiptr
// is like intptr_t.
if (!CheckedInt<GLsizeiptr>(data.Length()).isValid())
return ErrorOutOfMemory("bufferData: bad size");
InvalidateBufferFetching();
MakeContextCurrent();
GLenum error = CheckedBufferData(target, data.Length(), data.Data(), usage);
if (error) {
GenerateWarning("bufferData generated error %s", ErrorName(error));
return;
}
boundBuffer->SetByteLength(data.Length());
if (!boundBuffer->ElementArrayCacheBufferData(data.Data(), data.Length())) {
return ErrorOutOfMemory("bufferData: out of memory");
}
}
void
WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
const Nullable<ArrayBuffer> &maybeData)
{
if (IsContextLost())
return;
if (maybeData.IsNull()) {
// see http://www.khronos.org/bugzilla/show_bug.cgi?id=386
return;
}
WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferSubData");
if (!bufferSlot) {
return;
}
if (byteOffset < 0)
return ErrorInvalidValue("bufferSubData: negative offset");
WebGLBuffer* boundBuffer = bufferSlot->get();
if (!boundBuffer)
return ErrorInvalidOperation("bufferData: no buffer bound!");
const ArrayBuffer& data = maybeData.Value();
data.ComputeLengthAndData();
CheckedInt<WebGLsizeiptr> checked_neededByteLength = CheckedInt<WebGLsizeiptr>(byteOffset) + data.Length();
if (!checked_neededByteLength.isValid())
return ErrorInvalidValue("bufferSubData: integer overflow computing the needed byte length");
if (checked_neededByteLength.value() > boundBuffer->ByteLength())
return ErrorInvalidValue("bufferSubData: not enough data - operation requires %d bytes, but buffer only has %d bytes",
checked_neededByteLength.value(), boundBuffer->ByteLength());
MakeContextCurrent();
boundBuffer->ElementArrayCacheBufferSubData(byteOffset, data.Data(), data.Length());
gl->fBufferSubData(target, byteOffset, data.Length(), data.Data());
}
void
WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr byteOffset,
const ArrayBufferView& data)
{
if (IsContextLost())
return;
WebGLRefPtr<WebGLBuffer>* bufferSlot = GetBufferSlotByTarget(target, "bufferSubData");
if (!bufferSlot) {
return;
}
if (byteOffset < 0)
return ErrorInvalidValue("bufferSubData: negative offset");
WebGLBuffer* boundBuffer = bufferSlot->get();
if (!boundBuffer)
return ErrorInvalidOperation("bufferSubData: no buffer bound!");
data.ComputeLengthAndData();
CheckedInt<WebGLsizeiptr> checked_neededByteLength = CheckedInt<WebGLsizeiptr>(byteOffset) + data.Length();
if (!checked_neededByteLength.isValid())
return ErrorInvalidValue("bufferSubData: integer overflow computing the needed byte length");
if (checked_neededByteLength.value() > boundBuffer->ByteLength())
return ErrorInvalidValue("bufferSubData: not enough data -- operation requires %d bytes, but buffer only has %d bytes",
checked_neededByteLength.value(), boundBuffer->ByteLength());
boundBuffer->ElementArrayCacheBufferSubData(byteOffset, data.Data(), data.Length());
MakeContextCurrent();
gl->fBufferSubData(target, byteOffset, data.Length(), data.Data());
}
already_AddRefed<WebGLBuffer>
WebGLContext::CreateBuffer()
{
if (IsContextLost())
return nullptr;
nsRefPtr<WebGLBuffer> globj = new WebGLBuffer(this);
return globj.forget();
}
void
WebGLContext::DeleteBuffer(WebGLBuffer *buffer)
{
if (IsContextLost())
return;
if (!ValidateObjectAllowDeletedOrNull("deleteBuffer", buffer))
return;
if (!buffer || buffer->IsDeleted())
return;
if (mBoundArrayBuffer == buffer) {
BindBuffer(LOCAL_GL_ARRAY_BUFFER,
static_cast<WebGLBuffer*>(nullptr));
}
if (mBoundVertexArray->mElementArrayBuffer == buffer) {
BindBuffer(LOCAL_GL_ELEMENT_ARRAY_BUFFER,
static_cast<WebGLBuffer*>(nullptr));
}
for (int32_t i = 0; i < mGLMaxVertexAttribs; i++) {
if (mBoundVertexArray->HasAttrib(i) && mBoundVertexArray->mAttribs[i].buf == buffer)
mBoundVertexArray->mAttribs[i].buf = nullptr;
}
buffer->RequestDelete();
}
bool
WebGLContext::IsBuffer(WebGLBuffer *buffer)
{
if (IsContextLost())
return false;
return ValidateObjectAllowDeleted("isBuffer", buffer) &&
!buffer->IsDeleted() &&
buffer->HasEverBeenBound();
}
bool
WebGLContext::ValidateBufferUsageEnum(GLenum target, const char *infos)
{
switch (target) {
case LOCAL_GL_STREAM_DRAW:
case LOCAL_GL_STATIC_DRAW:
case LOCAL_GL_DYNAMIC_DRAW:
return true;
default:
break;
}
ErrorInvalidEnumInfo(infos, target);
return false;
}
WebGLRefPtr<WebGLBuffer>*
WebGLContext::GetBufferSlotByTarget(GLenum target, const char* infos)
{
switch (target) {
case LOCAL_GL_ARRAY_BUFFER:
return &mBoundArrayBuffer;
case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
return &mBoundVertexArray->mElementArrayBuffer;
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
if (!IsWebGL2()) {
break;
}
return &mBoundTransformFeedbackBuffer;
default:
break;
}
ErrorInvalidEnum("%s: target: invalid enum value 0x%x", infos, target);
return nullptr;
}
WebGLRefPtr<WebGLBuffer>*
WebGLContext::GetBufferSlotByTargetIndexed(GLenum target, GLuint index, const char* infos)
{
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
if (index >= mGLMaxTransformFeedbackSeparateAttribs) {
ErrorInvalidValue("%s: index should be less than MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS", infos, index);
return nullptr;
}
return nullptr; // See bug 903594
default:
break;
}
ErrorInvalidEnum("%s: target: invalid enum value 0x%x", infos, target);
return nullptr;
}
GLenum
WebGLContext::CheckedBufferData(GLenum target,
GLsizeiptr size,
const GLvoid *data,
GLenum usage)
{
#ifdef XP_MACOSX
// bug 790879
if (gl->WorkAroundDriverBugs() &&
int64_t(size) > INT32_MAX) // the 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
WebGLBuffer *boundBuffer = nullptr;
if (target == LOCAL_GL_ARRAY_BUFFER) {
boundBuffer = mBoundArrayBuffer;
} else if (target == LOCAL_GL_ELEMENT_ARRAY_BUFFER) {
boundBuffer = mBoundVertexArray->mElementArrayBuffer;
}
MOZ_ASSERT(boundBuffer != nullptr, "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;
}
}