gecko-dev/dom/canvas/WebGL2ContextBuffers.cpp

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4.5 KiB
C++

/* -*- 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 "WebGL2Context.h"
#include "GLContext.h"
#include "WebGLBuffer.h"
using namespace mozilla;
using namespace mozilla::dom;
bool
WebGL2Context::ValidateBufferTarget(GLenum target, const char* info)
{
switch (target) {
case LOCAL_GL_ARRAY_BUFFER:
case LOCAL_GL_COPY_READ_BUFFER:
case LOCAL_GL_COPY_WRITE_BUFFER:
case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
case LOCAL_GL_PIXEL_PACK_BUFFER:
case LOCAL_GL_PIXEL_UNPACK_BUFFER:
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
case LOCAL_GL_UNIFORM_BUFFER:
return true;
default:
ErrorInvalidEnumInfo(info, target);
return false;
}
}
bool
WebGL2Context::ValidateBufferIndexedTarget(GLenum target, const char* info)
{
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
case LOCAL_GL_UNIFORM_BUFFER:
return true;
default:
ErrorInvalidEnumInfo(info, target);
return false;
}
}
bool
WebGL2Context::ValidateBufferForTarget(GLenum target, WebGLBuffer* buffer,
const char* info)
{
if (!buffer)
return true;
switch (target) {
case LOCAL_GL_COPY_READ_BUFFER:
case LOCAL_GL_COPY_WRITE_BUFFER:
return true;
case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
return !buffer->HasEverBeenBound() ||
buffer->Target() == LOCAL_GL_ELEMENT_ARRAY_BUFFER;
case LOCAL_GL_ARRAY_BUFFER:
case LOCAL_GL_PIXEL_PACK_BUFFER:
case LOCAL_GL_PIXEL_UNPACK_BUFFER:
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
case LOCAL_GL_UNIFORM_BUFFER:
return !buffer->HasEverBeenBound() ||
buffer->Target() != LOCAL_GL_ELEMENT_ARRAY_BUFFER;
}
ErrorInvalidOperation("%s: buffer already bound to a incompatible target %s",
info, EnumName(buffer->Target().get()));
return false;
}
bool
WebGL2Context::ValidateBufferUsageEnum(GLenum usage, const char* info)
{
switch (usage) {
case LOCAL_GL_DYNAMIC_COPY:
case LOCAL_GL_DYNAMIC_DRAW:
case LOCAL_GL_DYNAMIC_READ:
case LOCAL_GL_STATIC_COPY:
case LOCAL_GL_STATIC_DRAW:
case LOCAL_GL_STATIC_READ:
case LOCAL_GL_STREAM_COPY:
case LOCAL_GL_STREAM_DRAW:
case LOCAL_GL_STREAM_READ:
return true;
default:
break;
}
ErrorInvalidEnumInfo(info, usage);
return false;
}
// -------------------------------------------------------------------------
// Buffer objects
void
WebGL2Context::CopyBufferSubData(GLenum readTarget, GLenum writeTarget,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size)
{
if (IsContextLost())
return;
if (!ValidateBufferTarget(readTarget, "copyBufferSubData") ||
!ValidateBufferTarget(writeTarget, "copyBufferSubData"))
{
return;
}
const WebGLRefPtr<WebGLBuffer>& readBufferSlot = GetBufferSlotByTarget(readTarget);
const WebGLRefPtr<WebGLBuffer>& writeBufferSlot = GetBufferSlotByTarget(writeTarget);
if (!readBufferSlot || !writeBufferSlot)
return;
const WebGLBuffer* readBuffer = readBufferSlot.get();
if (!readBuffer)
return ErrorInvalidOperation("copyBufferSubData: No buffer bound to readTarget");
const WebGLBuffer* writeBuffer = writeBufferSlot.get();
if (!writeBuffer)
return ErrorInvalidOperation("copyBufferSubData: No buffer bound to writeTarget");
if (!ValidateDataOffsetSize(readOffset, size, readBuffer->ByteLength(),
"copyBufferSubData"))
{
return;
}
if (!ValidateDataOffsetSize(writeOffset, size, writeBuffer->ByteLength(),
"copyBufferSubData"))
{
return;
}
if (readTarget == writeTarget &&
!ValidateDataRanges(readOffset, writeOffset, size, "copyBufferSubData"))
{
return;
}
WebGLContextUnchecked::CopyBufferSubData(readTarget, writeTarget, readOffset,
writeOffset, size);
}
void
WebGL2Context::GetBufferSubData(GLenum target, GLintptr offset,
const dom::ArrayBuffer& returnedData)
{
MOZ_CRASH("Not Implemented.");
}
void
WebGL2Context::GetBufferSubData(GLenum target, GLintptr offset,
const dom::ArrayBufferView& returnedData)
{
MOZ_CRASH("Not Implemented.");
}