mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-11 16:32:59 +00:00
511 lines
14 KiB
C++
511 lines
14 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 "WebGLTransformFeedback.h"
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#include "WebGLVertexArray.h"
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namespace mozilla {
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WebGLRefPtr<WebGLBuffer>*
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WebGLContext::ValidateBufferSlot(const char* funcName, GLenum target)
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{
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WebGLRefPtr<WebGLBuffer>* slot = nullptr;
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switch (target) {
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case LOCAL_GL_ARRAY_BUFFER:
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slot = &mBoundArrayBuffer;
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break;
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case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
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slot = &(mBoundVertexArray->mElementArrayBuffer);
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break;
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}
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if (IsWebGL2()) {
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switch (target) {
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case LOCAL_GL_COPY_READ_BUFFER:
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slot = &mBoundCopyReadBuffer;
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break;
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case LOCAL_GL_COPY_WRITE_BUFFER:
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slot = &mBoundCopyWriteBuffer;
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break;
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case LOCAL_GL_PIXEL_PACK_BUFFER:
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slot = &mBoundPixelPackBuffer;
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break;
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case LOCAL_GL_PIXEL_UNPACK_BUFFER:
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slot = &mBoundPixelUnpackBuffer;
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break;
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case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
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slot = &mBoundTransformFeedbackBuffer;
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break;
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case LOCAL_GL_UNIFORM_BUFFER:
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slot = &mBoundUniformBuffer;
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break;
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}
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}
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if (!slot) {
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ErrorInvalidEnum("%s: Bad `target`: 0x%04x", funcName, target);
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return nullptr;
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}
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return slot;
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}
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WebGLBuffer*
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WebGLContext::ValidateBufferSelection(const char* funcName, GLenum target)
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{
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const auto& slot = ValidateBufferSlot(funcName, target);
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if (!slot)
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return nullptr;
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const auto& buffer = *slot;
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if (!buffer) {
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ErrorInvalidOperation("%s: Buffer for `target` is null.", funcName);
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return nullptr;
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}
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if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER) {
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if (mBoundTransformFeedback->IsActiveAndNotPaused()) {
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ErrorInvalidOperation("%s: Cannot select TRANSFORM_FEEDBACK_BUFFER when"
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" transform feedback is active and unpaused.",
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funcName);
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return nullptr;
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}
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if (buffer->IsBoundForNonTF()) {
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ErrorInvalidOperation("%s: Specified WebGLBuffer is currently bound for"
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" non-transform-feedback.",
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funcName);
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return nullptr;
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}
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} else {
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if (buffer->IsBoundForTF()) {
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ErrorInvalidOperation("%s: Specified WebGLBuffer is currently bound for"
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" transform feedback.",
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funcName);
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return nullptr;
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}
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}
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return buffer.get();
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}
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IndexedBufferBinding*
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WebGLContext::ValidateIndexedBufferSlot(const char* funcName, GLenum target, GLuint index)
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{
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decltype(mIndexedUniformBufferBindings)* bindings;
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const char* maxIndexEnum;
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switch (target) {
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case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
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bindings = &(mBoundTransformFeedback->mIndexedBindings);
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maxIndexEnum = "MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS";
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break;
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case LOCAL_GL_UNIFORM_BUFFER:
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bindings = &mIndexedUniformBufferBindings;
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maxIndexEnum = "MAX_UNIFORM_BUFFER_BINDINGS";
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break;
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default:
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ErrorInvalidEnum("%s: Bad `target`: 0x%04x", funcName, target);
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return nullptr;
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}
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if (index >= bindings->size()) {
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ErrorInvalidValue("%s: `index` >= %s.", funcName, maxIndexEnum);
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return nullptr;
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}
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return &(*bindings)[index];
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}
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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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const char funcName[] = "bindBuffer";
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if (IsContextLost())
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return;
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if (buffer && !ValidateObject(funcName, *buffer))
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return;
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const auto& slot = ValidateBufferSlot(funcName, target);
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if (!slot)
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return;
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if (buffer && !buffer->ValidateCanBindToTarget(funcName, target))
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return;
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gl->fBindBuffer(target, buffer ? buffer->mGLName : 0);
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WebGLBuffer::SetSlot(target, buffer, slot);
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if (buffer) {
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buffer->SetContentAfterBind(target);
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}
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switch (target) {
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case LOCAL_GL_PIXEL_PACK_BUFFER:
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case LOCAL_GL_PIXEL_UNPACK_BUFFER:
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gl->fBindBuffer(target, 0);
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break;
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}
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}
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////////////////////////////////////////
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bool
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WebGLContext::ValidateIndexedBufferBinding(const char* funcName, GLenum target,
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GLuint index,
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WebGLRefPtr<WebGLBuffer>** const out_genericBinding,
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IndexedBufferBinding** const out_indexedBinding)
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{
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*out_genericBinding = ValidateBufferSlot(funcName, target);
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if (!*out_genericBinding)
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return false;
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*out_indexedBinding = ValidateIndexedBufferSlot(funcName, target, index);
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if (!*out_indexedBinding)
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return false;
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if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER &&
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mBoundTransformFeedback->mIsActive)
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{
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ErrorInvalidOperation("%s: Cannot update indexed buffer bindings on active"
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" transform feedback objects.",
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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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void
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WebGLContext::BindBufferBase(GLenum target, GLuint index, WebGLBuffer* buffer)
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{
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const char funcName[] = "bindBufferBase";
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if (IsContextLost())
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return;
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if (buffer && !ValidateObject(funcName, *buffer))
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return;
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WebGLRefPtr<WebGLBuffer>* genericBinding;
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IndexedBufferBinding* indexedBinding;
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if (!ValidateIndexedBufferBinding(funcName, target, index, &genericBinding,
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&indexedBinding))
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{
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return;
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}
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if (buffer && !buffer->ValidateCanBindToTarget(funcName, target))
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return;
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////
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gl->fBindBufferBase(target, index, buffer ? buffer->mGLName : 0);
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////
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WebGLBuffer::SetSlot(target, buffer, genericBinding);
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WebGLBuffer::SetSlot(target, buffer, &indexedBinding->mBufferBinding);
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indexedBinding->mRangeStart = 0;
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indexedBinding->mRangeSize = 0;
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if (buffer) {
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buffer->SetContentAfterBind(target);
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}
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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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const char funcName[] = "bindBufferRange";
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if (IsContextLost())
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return;
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if (buffer && !ValidateObject(funcName, *buffer))
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return;
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if (!ValidateNonNegative(funcName, "offset", offset) ||
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!ValidateNonNegative(funcName, "size", size))
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{
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return;
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}
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WebGLRefPtr<WebGLBuffer>* genericBinding;
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IndexedBufferBinding* indexedBinding;
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if (!ValidateIndexedBufferBinding(funcName, target, index, &genericBinding,
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&indexedBinding))
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{
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return;
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}
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if (buffer && !buffer->ValidateCanBindToTarget(funcName, target))
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return;
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if (buffer && !size) {
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ErrorInvalidValue("%s: size must be non-zero for non-null buffer.", funcName);
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return;
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}
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////
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switch (target) {
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case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
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if (offset % 4 != 0 || size % 4 != 0) {
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ErrorInvalidValue("%s: For %s, `offset` and `size` must be multiples of 4.",
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funcName, "TRANSFORM_FEEDBACK_BUFFER");
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return;
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}
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break;
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case LOCAL_GL_UNIFORM_BUFFER:
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{
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GLuint offsetAlignment = 0;
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gl->GetUIntegerv(LOCAL_GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &offsetAlignment);
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if (offset % offsetAlignment != 0) {
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ErrorInvalidValue("%s: For %s, `offset` must be a multiple of %s.",
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funcName, "UNIFORM_BUFFER",
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"UNIFORM_BUFFER_OFFSET_ALIGNMENT");
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return;
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}
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}
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break;
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}
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////
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#ifdef XP_MACOSX
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if (buffer && buffer->Content() == WebGLBuffer::Kind::Undefined &&
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gl->WorkAroundDriverBugs())
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{
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// BindBufferRange will fail if the buffer's contents is undefined.
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// Bind so driver initializes the buffer.
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gl->fBindBuffer(target, buffer->mGLName);
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}
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#endif
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gl->fBindBufferRange(target, index, buffer ? buffer->mGLName : 0, offset, size);
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////
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WebGLBuffer::SetSlot(target, buffer, genericBinding);
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WebGLBuffer::SetSlot(target, buffer, &indexedBinding->mBufferBinding);
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indexedBinding->mRangeStart = offset;
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indexedBinding->mRangeSize = size;
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if (buffer) {
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buffer->SetContentAfterBind(target);
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}
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}
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////////////////////////////////////////
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void
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WebGLContext::BufferDataImpl(GLenum target, size_t dataLen, const uint8_t* data,
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GLenum usage)
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{
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const char funcName[] = "bufferData";
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const auto& buffer = ValidateBufferSelection(funcName, target);
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if (!buffer)
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return;
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buffer->BufferData(target, dataLen, data, usage);
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}
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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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const char funcName[] = "bufferData";
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if (IsContextLost())
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return;
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if (!ValidateNonNegative(funcName, "size", size))
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return;
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////
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const UniqueBuffer zeroBuffer(calloc(size, 1));
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if (!zeroBuffer)
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return ErrorOutOfMemory("%s: Failed to allocate zeros.", funcName);
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BufferDataImpl(target, size_t(size), (const uint8_t*)zeroBuffer.get(), usage);
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}
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void
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WebGLContext::BufferData(GLenum target, const dom::Nullable<dom::ArrayBuffer>& maybeSrc,
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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 (!ValidateNonNull("bufferData", maybeSrc))
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return;
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const auto& src = maybeSrc.Value();
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src.ComputeLengthAndData();
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BufferDataImpl(target, src.LengthAllowShared(), src.DataAllowShared(), usage);
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}
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void
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WebGLContext::BufferData(GLenum target, const dom::ArrayBufferView& src, GLenum usage,
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GLuint srcElemOffset, GLuint srcElemCountOverride)
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{
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const char funcName[] = "bufferData";
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if (IsContextLost())
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return;
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uint8_t* bytes;
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size_t byteLen;
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if (!ValidateArrayBufferView(funcName, src, srcElemOffset, srcElemCountOverride,
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&bytes, &byteLen))
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{
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return;
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}
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BufferDataImpl(target, byteLen, bytes, usage);
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}
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////////////////////////////////////////
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void
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WebGLContext::BufferSubDataImpl(GLenum target, WebGLsizeiptr dstByteOffset,
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size_t dataLen, const uint8_t* data)
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{
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const char funcName[] = "bufferSubData";
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if (!ValidateNonNegative(funcName, "byteOffset", dstByteOffset))
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return;
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const auto& buffer = ValidateBufferSelection(funcName, target);
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if (!buffer)
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return;
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buffer->BufferSubData(target, size_t(dstByteOffset), dataLen, data);
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}
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////
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void
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WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr dstByteOffset,
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const dom::ArrayBuffer& src)
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{
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if (IsContextLost())
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return;
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src.ComputeLengthAndData();
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BufferSubDataImpl(target, dstByteOffset, src.LengthAllowShared(),
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src.DataAllowShared());
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}
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void
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WebGLContext::BufferSubData(GLenum target, WebGLsizeiptr dstByteOffset,
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const dom::ArrayBufferView& src, GLuint srcElemOffset,
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GLuint srcElemCountOverride)
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{
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const char funcName[] = "bufferSubData";
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if (IsContextLost())
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return;
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uint8_t* bytes;
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size_t byteLen;
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if (!ValidateArrayBufferView(funcName, src, srcElemOffset, srcElemCountOverride,
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&bytes, &byteLen))
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{
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return;
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}
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BufferSubDataImpl(target, dstByteOffset, byteLen, bytes);
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}
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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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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 (!ValidateDeleteObject("deleteBuffer", buffer))
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return;
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////
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const auto fnClearIfBuffer = [&](GLenum target, WebGLRefPtr<WebGLBuffer>& bindPoint) {
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if (bindPoint == buffer) {
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WebGLBuffer::SetSlot(target, nullptr, &bindPoint);
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}
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};
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fnClearIfBuffer(0, mBoundArrayBuffer);
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fnClearIfBuffer(0, mBoundVertexArray->mElementArrayBuffer);
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for (auto& cur : mBoundVertexArray->mAttribs) {
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fnClearIfBuffer(0, cur.mBuf);
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}
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// WebGL binding points
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if (IsWebGL2()) {
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fnClearIfBuffer(0, mBoundCopyReadBuffer);
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fnClearIfBuffer(0, mBoundCopyWriteBuffer);
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fnClearIfBuffer(0, mBoundPixelPackBuffer);
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fnClearIfBuffer(0, mBoundPixelUnpackBuffer);
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fnClearIfBuffer(0, mBoundUniformBuffer);
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fnClearIfBuffer(LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER,
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mBoundTransformFeedbackBuffer);
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if (!mBoundTransformFeedback->mIsActive) {
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for (auto& binding : mBoundTransformFeedback->mIndexedBindings) {
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fnClearIfBuffer(LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER,
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binding.mBufferBinding);
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}
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}
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for (auto& binding : mIndexedUniformBufferBindings) {
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fnClearIfBuffer(0, binding.mBufferBinding);
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}
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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 (!ValidateIsObject("isBuffer", buffer))
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return false;
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return gl->fIsBuffer(buffer->mGLName);
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}
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} // namespace mozilla
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