bool Canvas2DLayerBridge::restoreSurface()
{
ASSERT(!m_destructionInProgress);
if (m_destructionInProgress)
return false;
ASSERT(m_layer && !m_isSurfaceValid);
WebGraphicsContext3D* sharedContext = 0;
// We must clear the mailboxes before calling m_layer->clearTexture() to prevent
// re-entry via mailboxReleased from operating on defunct GrContext objects.
m_mailboxes.clear();
m_layer->clearTexture();
m_contextProvider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
if (m_contextProvider)
sharedContext = m_contextProvider->context3d();
if (sharedContext && !sharedContext->isContextLost()) {
IntSize size(m_canvas->getTopDevice()->width(), m_canvas->getTopDevice()->height());
RefPtr<SkSurface> surface(createSkSurface(m_contextProvider->grContext(), size, m_msaaSampleCount, m_opacityMode));
if (surface.get()) {
m_surface = surface.release();
m_canvas->setSurface(m_surface.get());
m_isSurfaceValid = true;
// FIXME: draw sad canvas picture into new buffer crbug.com/243842
}
}
return m_isSurfaceValid;
}
bool Canvas2DLayerBridge::restoreSurface()
{
ASSERT(!m_destructionInProgress);
if (m_destructionInProgress)
return false;
ASSERT(isAccelerated() && !m_surface);
WebGraphicsContext3D* sharedContext = 0;
m_layer->clearTexture();
m_contextProvider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
if (m_contextProvider)
sharedContext = m_contextProvider->context3d();
if (sharedContext && !sharedContext->isContextLost()) {
GrContext* grCtx = m_contextProvider->grContext();
bool surfaceIsAccelerated;
RefPtr<SkSurface> surface(createSkSurface(grCtx, m_size, m_msaaSampleCount, m_opacityMode, &surfaceIsAccelerated));
// Current paradigm does support switching from accelerated to non-accelerated, which would be tricky
// due to changes to the layer tree, which can only happen at specific times during the document lifecycle.
// Therefore, we can only accept the restored surface if it is accelerated.
if (surface.get() && surfaceIsAccelerated) {
m_surface = surface.release();
// FIXME: draw sad canvas picture into new buffer crbug.com/243842
}
}
return m_surface;
}
bool Canvas2DLayerBridge::restoreSurface()
{
ASSERT(!m_destructionInProgress);
if (m_destructionInProgress)
return false;
ASSERT(m_layer && !m_surface);
WebGraphicsContext3D* sharedContext = 0;
m_layer->clearTexture();
m_contextProvider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
if (m_contextProvider)
sharedContext = m_contextProvider->context3d();
if (sharedContext && !sharedContext->isContextLost()) {
GrContext* grCtx = m_contextProvider->grContext();
RefPtr<SkSurface> surface(createSkSurface(grCtx, m_size, m_msaaSampleCount, m_opacityMode));
if (surface.get()) {
m_surface = surface.release();
m_initialSurfaceSaveCount = m_surface->getCanvas()->getSaveCount();
// FIXME: draw sad canvas picture into new buffer crbug.com/243842
}
}
return m_surface;
}
bool Canvas2DLayerBridge::restoreSurface()
{
ASSERT(!m_destructionInProgress);
if (m_destructionInProgress)
return false;
ASSERT(m_layer && !m_isSurfaceValid);
WebGraphicsContext3D* sharedContext = 0;
m_layer->clearTexture();
m_contextProvider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
if (m_contextProvider)
sharedContext = m_contextProvider->context3d();
if (sharedContext && !sharedContext->isContextLost()) {
SkISize skSize = m_canvas->getBaseLayerSize();
IntSize size(skSize.width(), skSize.height());
RefPtr<SkSurface> surface(createSkSurface(m_contextProvider->grContext(), size, m_msaaSampleCount, m_opacityMode));
if (surface.get()) {
m_surface = surface.release();
m_canvas->setSurface(m_surface.get());
m_isSurfaceValid = true;
// FIXME: draw sad canvas picture into new buffer crbug.com/243842
}
}
return m_isSurfaceValid;
}
void Canvas2DLayerBridge::flushGpu()
{
TRACE_EVENT0("cc", "Canvas2DLayerBridge::flushGpu");
flush();
WebGraphicsContext3D* webContext = context();
if (isAccelerated() && webContext)
webContext->flush();
}
void WebGLProgram::cacheInfoIfNeeded()
{
if (m_infoValid)
return;
if (!m_object)
return;
if (!contextGroup())
return;
WebGraphicsContext3D* context = contextGroup()->getAWebGraphicsContext3D();
if (!context)
return;
GLint linkStatus = 0;
context->getProgramiv(m_object, GL_LINK_STATUS, &linkStatus);
m_linkStatus = linkStatus;
if (m_linkStatus)
cacheActiveAttribLocations(context);
m_infoValid = true;
}
bool ImageBuffer::copyToPlatformTexture(WebGraphicsContext3D* context, Platform3DObject texture, GLenum internalFormat, GLenum destType, GLint level, bool premultiplyAlpha, bool flipY)
{
if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(GL_TEXTURE_2D, internalFormat, destType, level))
return false;
if (!isSurfaceValid())
return false;
RefPtr<const SkImage> textureImage = m_surface->newImageSnapshot(PreferAcceleration);
if (!textureImage)
return false;
if (!m_surface->isAccelerated())
return false;
ASSERT(textureImage->isTextureBacked()); // isAccelerated() check above should guarantee this
// Get the texture ID, flushing pending operations if needed.
Platform3DObject textureId = textureImage->getTextureHandle(true);
if (!textureId)
return false;
OwnPtr<WebGraphicsContext3DProvider> provider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
if (!provider)
return false;
WebGraphicsContext3D* sharedContext = provider->context3d();
if (!sharedContext)
return false;
OwnPtr<WebExternalTextureMailbox> mailbox = adoptPtr(new WebExternalTextureMailbox);
// Contexts may be in a different share group. We must transfer the texture through a mailbox first
sharedContext->genMailboxCHROMIUM(mailbox->name);
sharedContext->produceTextureDirectCHROMIUM(textureId, GL_TEXTURE_2D, mailbox->name);
sharedContext->flush();
mailbox->validSyncToken = sharedContext->insertSyncPoint(mailbox->syncToken);
if (mailbox->validSyncToken)
context->waitSyncToken(mailbox->syncToken);
Platform3DObject sourceTexture = context->createAndConsumeTextureCHROMIUM(GL_TEXTURE_2D, mailbox->name);
// The canvas is stored in a premultiplied format, so unpremultiply if necessary.
// The canvas is stored in an inverted position, so the flip semantics are reversed.
context->copyTextureCHROMIUM(GL_TEXTURE_2D, sourceTexture, texture, internalFormat, destType, flipY ? GL_FALSE : GL_TRUE, GL_FALSE, premultiplyAlpha ? GL_FALSE : GL_TRUE);
context->deleteTexture(sourceTexture);
context->flush();
WGC3Dbyte syncToken[24];
if (context->insertSyncPoint(syncToken))
sharedContext->waitSyncToken(syncToken);
// Undo grContext texture binding changes introduced in this function
provider->grContext()->resetContext(kTextureBinding_GrGLBackendState);
return true;
}
bool ImageBuffer::copyToPlatformTexture(WebGraphicsContext3D* context, Platform3DObject texture, GLenum internalFormat, GLenum destType, GLint level, bool premultiplyAlpha, bool flipY)
{
if (!m_surface->isAccelerated() || !getBackingTexture() || !isSurfaceValid())
return false;
if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(internalFormat, destType, level))
return false;
OwnPtr<WebGraphicsContext3DProvider> provider = adoptPtr(Platform::current()->createSharedOffscreenGraphicsContext3DProvider());
if (!provider)
return false;
WebGraphicsContext3D* sharedContext = provider->context3d();
if (!sharedContext)
return false;
OwnPtr<WebExternalTextureMailbox> mailbox = adoptPtr(new WebExternalTextureMailbox);
// Contexts may be in a different share group. We must transfer the texture through a mailbox first
sharedContext->genMailboxCHROMIUM(mailbox->name);
sharedContext->produceTextureDirectCHROMIUM(getBackingTexture(), GL_TEXTURE_2D, mailbox->name);
sharedContext->flush();
mailbox->syncPoint = sharedContext->insertSyncPoint();
context->waitSyncPoint(mailbox->syncPoint);
Platform3DObject sourceTexture = context->createAndConsumeTextureCHROMIUM(GL_TEXTURE_2D, mailbox->name);
// The canvas is stored in a premultiplied format, so unpremultiply if necessary.
context->pixelStorei(GC3D_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, !premultiplyAlpha);
// The canvas is stored in an inverted position, so the flip semantics are reversed.
context->pixelStorei(GC3D_UNPACK_FLIP_Y_CHROMIUM, !flipY);
context->copyTextureCHROMIUM(GL_TEXTURE_2D, sourceTexture, texture, level, internalFormat, destType);
context->pixelStorei(GC3D_UNPACK_FLIP_Y_CHROMIUM, false);
context->pixelStorei(GC3D_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, false);
context->deleteTexture(sourceTexture);
context->flush();
sharedContext->waitSyncPoint(context->insertSyncPoint());
// Undo grContext texture binding changes introduced in this function
provider->grContext()->resetContext(kTextureBinding_GrGLBackendState);
return true;
}
bool Canvas2DLayerBridge::prepareMailbox(WebExternalTextureMailbox* outMailbox, WebExternalBitmap* bitmap)
{
ASSERT(isAccelerated());
if (m_destructionInProgress) {
// It can be hit in the following sequence.
// 1. Canvas draws something.
// 2. The compositor begins the frame.
// 3. Javascript makes a context be lost.
// 4. Here.
return false;
}
if (bitmap) {
// Using accelerated 2d canvas with software renderer, which
// should only happen in tests that use fake graphics contexts
// or in Android WebView in software mode. In this case, we do
// not care about producing any results for this canvas.
skipQueuedDrawCommands();
m_lastImageId = 0;
return false;
}
if (!checkSurfaceValid())
return false;
WebGraphicsContext3D* webContext = context();
RefPtr<SkImage> image = newImageSnapshot(PreferAcceleration);
// Early exit if canvas was not drawn to since last prepareMailbox
GLenum filter = m_filterQuality == kNone_SkFilterQuality ? GL_NEAREST : GL_LINEAR;
if (image->uniqueID() == m_lastImageId && filter == m_lastFilter)
return false;
m_lastImageId = image->uniqueID();
m_lastFilter = filter;
{
MailboxInfo tmp;
tmp.m_image = image;
tmp.m_parentLayerBridge = this;
m_mailboxes.prepend(tmp);
}
MailboxInfo& mailboxInfo = m_mailboxes.first();
mailboxInfo.m_mailbox.nearestNeighbor = filter == GL_NEAREST;
GrContext* grContext = m_contextProvider->grContext();
if (!grContext)
return true; // for testing: skip gl stuff when using a mock graphics context.
// Need to flush skia's internal queue because texture is about to be accessed directly
grContext->flush();
ASSERT(image->getTexture());
// Because of texture sharing with the compositor, we must invalidate
// the state cached in skia so that the deferred copy on write
// in SkSurface_Gpu does not make any false assumptions.
mailboxInfo.m_image->getTexture()->textureParamsModified();
webContext->bindTexture(GL_TEXTURE_2D, mailboxInfo.m_image->getTexture()->getTextureHandle());
webContext->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
webContext->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
webContext->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
webContext->texParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// Re-use the texture's existing mailbox, if there is one.
if (image->getTexture()->getCustomData()) {
ASSERT(image->getTexture()->getCustomData()->size() == sizeof(mailboxInfo.m_mailbox.name));
memcpy(&mailboxInfo.m_mailbox.name[0], image->getTexture()->getCustomData()->data(), sizeof(mailboxInfo.m_mailbox.name));
} else {
context()->genMailboxCHROMIUM(mailboxInfo.m_mailbox.name);
RefPtr<SkData> mailboxNameData = adoptRef(SkData::NewWithCopy(&mailboxInfo.m_mailbox.name[0], sizeof(mailboxInfo.m_mailbox.name)));
image->getTexture()->setCustomData(mailboxNameData.get());
webContext->produceTextureCHROMIUM(GL_TEXTURE_2D, mailboxInfo.m_mailbox.name);
}
if (isHidden()) {
// With hidden canvases, we release the SkImage immediately because
// there is no need for animations to be double buffered.
mailboxInfo.m_image.clear();
} else {
// FIXME: We'd rather insert a syncpoint than perform a flush here,
// but currentlythe canvas will flicker if we don't flush here.
webContext->flush();
// mailboxInfo.m_mailbox.syncPoint = webContext->insertSyncPoint();
}
webContext->bindTexture(GL_TEXTURE_2D, 0);
// Because we are changing the texture binding without going through skia,
// we must dirty the context.
grContext->resetContext(kTextureBinding_GrGLBackendState);
*outMailbox = mailboxInfo.m_mailbox;
return true;
}
// static
bool WebGLDrawBuffers::satisfiesWebGLRequirements(WebGLRenderingContextBase* webglContext)
{
WebGraphicsContext3D* context = webglContext->webContext();
Extensions3DUtil* extensionsUtil = webglContext->extensionsUtil();
// This is called after we make sure GL_EXT_draw_buffers is supported.
GLint maxDrawBuffers = 0;
GLint maxColorAttachments = 0;
context->getIntegerv(GL_MAX_DRAW_BUFFERS_EXT, &maxDrawBuffers);
context->getIntegerv(GL_MAX_COLOR_ATTACHMENTS_EXT, &maxColorAttachments);
if (maxDrawBuffers < 4 || maxColorAttachments < 4)
return false;
Platform3DObject fbo = context->createFramebuffer();
context->bindFramebuffer(GL_FRAMEBUFFER, fbo);
const unsigned char* buffer = 0; // Chromium doesn't allow init data for depth/stencil tetxures.
bool supportsDepth = (extensionsUtil->supportsExtension("GL_CHROMIUM_depth_texture")
|| extensionsUtil->supportsExtension("GL_OES_depth_texture")
|| extensionsUtil->supportsExtension("GL_ARB_depth_texture"));
bool supportsDepthStencil = (extensionsUtil->supportsExtension("GL_EXT_packed_depth_stencil")
|| extensionsUtil->supportsExtension("GL_OES_packed_depth_stencil"));
Platform3DObject depthStencil = 0;
if (supportsDepthStencil) {
depthStencil = context->createTexture();
context->bindTexture(GL_TEXTURE_2D, depthStencil);
context->texImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_STENCIL_OES, 1, 1, 0, GL_DEPTH_STENCIL_OES, GL_UNSIGNED_INT_24_8_OES, buffer);
}
Platform3DObject depth = 0;
if (supportsDepth) {
depth = context->createTexture();
context->bindTexture(GL_TEXTURE_2D, depth);
context->texImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, 1, 1, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, buffer);
}
Vector<Platform3DObject> colors;
bool ok = true;
GLint maxAllowedBuffers = std::min(maxDrawBuffers, maxColorAttachments);
for (GLint i = 0; i < maxAllowedBuffers; ++i) {
Platform3DObject color = context->createTexture();
colors.append(color);
context->bindTexture(GL_TEXTURE_2D, color);
context->texImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
context->framebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, color, 0);
if (context->checkFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
ok = false;
break;
}
if (supportsDepth) {
context->framebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depth, 0);
if (context->checkFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
ok = false;
break;
}
context->framebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
}
if (supportsDepthStencil) {
context->framebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthStencil, 0);
context->framebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, depthStencil, 0);
if (context->checkFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
ok = false;
break;
}
context->framebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
context->framebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
}
}
webglContext->restoreCurrentFramebuffer();
context->deleteFramebuffer(fbo);
webglContext->restoreCurrentTexture2D();
if (supportsDepth)
context->deleteTexture(depth);
if (supportsDepthStencil)
context->deleteTexture(depthStencil);
for (size_t i = 0; i < colors.size(); ++i)
context->deleteTexture(colors[i]);
return ok;
}