void DrawingBuffer::reset(const IntSize& newSize)
{
if (!m_context)
return;
IntSize adjustedSize;
bool evictContext = false;
bool isNewContext = m_size.isEmpty();
if (s_allowContextEvictionOnCreate && isNewContext)
adjustedSize = adjustSizeWithContextEviction(newSize, evictContext);
else
adjustedSize = adjustSize(newSize);
if (adjustedSize.isEmpty())
return;
if (evictContext)
m_contextEvictionManager->forciblyLoseOldestContext("WARNING: WebGL contexts have exceeded the maximum allowed backbuffer area. Oldest context will be lost.");
if (adjustedSize != m_size) {
do {
// resize multisample FBO
if (!resizeMultisampleFramebuffer(adjustedSize) || !resizeFramebuffer(adjustedSize)) {
adjustedSize.scale(s_resourceAdjustedRatio);
continue;
}
break;
} while (!adjustedSize.isEmpty());
setSize(adjustedSize);
if (adjustedSize.isEmpty())
return;
}
m_context->disable(GL_SCISSOR_TEST);
m_context->clearColor(0, 0, 0, 0);
m_context->colorMask(true, true, true, true);
GLbitfield clearMask = GL_COLOR_BUFFER_BIT;
if (m_attributes.depth) {
m_context->clearDepth(1.0f);
clearMask |= GL_DEPTH_BUFFER_BIT;
m_context->depthMask(true);
}
if (m_attributes.stencil) {
m_context->clearStencil(0);
clearMask |= GL_STENCIL_BUFFER_BIT;
m_context->stencilMaskSeparate(GL_FRONT, 0xFFFFFFFF);
}
clearFramebuffers(clearMask);
}
bool DrawingBuffer::reset(const IntSize& newSize)
{
ASSERT(!newSize.isEmpty());
IntSize adjustedSize = adjustSize(newSize, m_size, m_maxTextureSize);
if (adjustedSize.isEmpty())
return false;
if (adjustedSize != m_size) {
do {
if (!resizeDefaultFramebuffer(adjustedSize)) {
adjustedSize.scale(s_resourceAdjustedRatio);
continue;
}
break;
} while (!adjustedSize.isEmpty());
setSize(adjustedSize);
if (adjustedSize.isEmpty())
return false;
}
m_gl->Disable(GL_SCISSOR_TEST);
m_gl->ClearColor(0, 0, 0, defaultBufferRequiresAlphaChannelToBePreserved() ? 1 : 0);
m_gl->ColorMask(true, true, true, true);
GLbitfield clearMask = GL_COLOR_BUFFER_BIT;
if (!!m_depthStencilBuffer) {
m_gl->ClearDepthf(1.0f);
clearMask |= GL_DEPTH_BUFFER_BIT;
m_gl->DepthMask(true);
}
if (!!m_depthStencilBuffer) {
m_gl->ClearStencil(0);
clearMask |= GL_STENCIL_BUFFER_BIT;
m_gl->StencilMaskSeparate(GL_FRONT, 0xFFFFFFFF);
}
clearFramebuffers(clearMask);
return true;
}
bool DrawingBuffer::reset(const IntSize& newSize)
{
if (!m_context)
return false;
m_context->makeContextCurrent();
int maxTextureSize = 0;
m_context->getIntegerv(GraphicsContext3D::MAX_TEXTURE_SIZE, &maxTextureSize);
if (newSize.height() > maxTextureSize || newSize.width() > maxTextureSize) {
clear();
return false;
}
int pixelDelta = newSize.width() * newSize.height();
int oldSize = 0;
if (!m_size.isEmpty()) {
oldSize = m_size.width() * m_size.height();
pixelDelta -= oldSize;
}
IntSize adjustedSize = newSize;
if (s_maximumResourceUsePixels) {
while ((s_currentResourceUsePixels + pixelDelta) > s_maximumResourceUsePixels) {
adjustedSize.scale(s_resourceAdjustedRatio);
if (adjustedSize.isEmpty()) {
clear();
return false;
}
pixelDelta = adjustedSize.width() * adjustedSize.height();
pixelDelta -= oldSize;
}
}
const GraphicsContext3D::Attributes& attributes = m_context->getContextAttributes();
if (adjustedSize != m_size) {
unsigned internalColorFormat, colorFormat, internalRenderbufferFormat;
if (attributes.alpha) {
internalColorFormat = GraphicsContext3D::RGBA;
colorFormat = GraphicsContext3D::RGBA;
internalRenderbufferFormat = Extensions3D::RGBA8_OES;
} else {
internalColorFormat = GraphicsContext3D::RGB;
colorFormat = GraphicsContext3D::RGB;
internalRenderbufferFormat = Extensions3D::RGB8_OES;
}
do {
m_size = adjustedSize;
// resize multisample FBO
if (multisample()) {
int maxSampleCount = 0;
m_context->getIntegerv(Extensions3D::MAX_SAMPLES, &maxSampleCount);
int sampleCount = std::min(4, maxSampleCount);
m_context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_multisampleFBO);
m_context->bindRenderbuffer(GraphicsContext3D::RENDERBUFFER, m_multisampleColorBuffer);
m_context->getExtensions()->renderbufferStorageMultisample(GraphicsContext3D::RENDERBUFFER, sampleCount, internalRenderbufferFormat, m_size.width(), m_size.height());
m_context->framebufferRenderbuffer(GraphicsContext3D::FRAMEBUFFER, GraphicsContext3D::COLOR_ATTACHMENT0, GraphicsContext3D::RENDERBUFFER, m_multisampleColorBuffer);
resizeDepthStencil(sampleCount);
if (m_context->checkFramebufferStatus(GraphicsContext3D::FRAMEBUFFER) != GraphicsContext3D::FRAMEBUFFER_COMPLETE) {
adjustedSize.scale(s_resourceAdjustedRatio);
continue;
}
}
// resize regular FBO
m_context->bindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_fbo);
m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, m_colorBuffer);
m_context->texImage2D(GraphicsContext3D::TEXTURE_2D, 0, internalColorFormat, m_size.width(), m_size.height(), 0, colorFormat, GraphicsContext3D::UNSIGNED_BYTE, 0);
m_context->framebufferTexture2D(GraphicsContext3D::FRAMEBUFFER, GraphicsContext3D::COLOR_ATTACHMENT0, GraphicsContext3D::TEXTURE_2D, m_colorBuffer, 0);
// resize the front color buffer
if (m_separateFrontTexture) {
m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, m_frontColorBuffer);
m_context->texImage2D(GraphicsContext3D::TEXTURE_2D, 0, internalColorFormat, m_size.width(), m_size.height(), 0, colorFormat, GraphicsContext3D::UNSIGNED_BYTE, 0);
}
m_context->bindTexture(GraphicsContext3D::TEXTURE_2D, 0);
if (!multisample())
resizeDepthStencil(0);
if (m_context->checkFramebufferStatus(GraphicsContext3D::FRAMEBUFFER) == GraphicsContext3D::FRAMEBUFFER_COMPLETE)
break;
adjustedSize.scale(s_resourceAdjustedRatio);
} while (!adjustedSize.isEmpty());
pixelDelta = m_size.width() * m_size.height();
pixelDelta -= oldSize;
s_currentResourceUsePixels += pixelDelta;
if (!newSize.isEmpty() && adjustedSize.isEmpty()) {
clear();
return false;
}
}
m_context->disable(GraphicsContext3D::SCISSOR_TEST);
m_context->clearColor(0, 0, 0, 0);
m_context->colorMask(true, true, true, true);
GC3Dbitfield clearMask = GraphicsContext3D::COLOR_BUFFER_BIT;
if (attributes.depth) {
m_context->clearDepth(1.0f);
clearMask |= GraphicsContext3D::DEPTH_BUFFER_BIT;
m_context->depthMask(true);
}
if (attributes.stencil) {
m_context->clearStencil(0);
clearMask |= GraphicsContext3D::STENCIL_BUFFER_BIT;
m_context->stencilMaskSeparate(GraphicsContext3D::FRONT, 0xFFFFFFFF);
}
clearFramebuffers(clearMask);
return true;
}
void DrawingBuffer::reset(const IntSize& newSize)
{
if (!m_context)
return;
IntSize adjustedSize;
bool evictContext = false;
bool isNewContext = m_size.isEmpty();
if (s_allowContextEvictionOnCreate && isNewContext)
adjustedSize = adjustSizeWithContextEviction(newSize, evictContext);
else
adjustedSize = adjustSize(newSize);
if (adjustedSize.isEmpty())
return;
if (evictContext)
m_contextEvictionManager->forciblyLoseOldestContext("WARNING: WebGL contexts have exceeded the maximum allowed backbuffer area. Oldest context will be lost.");
if (adjustedSize != m_size) {
do {
// resize multisample FBO
if (!resizeMultisampleFramebuffer(adjustedSize) || !resizeFramebuffer(adjustedSize)) {
adjustedSize.scale(s_resourceAdjustedRatio);
continue;
}
#if OS(DARWIN)
// FIXME: This can be removed once renderbufferStorageMultisample starts reporting GL_OUT_OF_MEMORY properly on OSX.
if (!checkBufferIntegrity()) {
adjustedSize.scale(s_resourceAdjustedRatio);
continue;
}
#endif
break;
} while (!adjustedSize.isEmpty());
setSize(adjustedSize);
if (adjustedSize.isEmpty())
return;
}
m_context->disable(GraphicsContext3D::SCISSOR_TEST);
m_context->clearColor(0, 0, 0, 0);
m_context->colorMask(true, true, true, true);
GC3Dbitfield clearMask = GraphicsContext3D::COLOR_BUFFER_BIT;
if (m_attributes.depth) {
m_context->clearDepth(1.0f);
clearMask |= GraphicsContext3D::DEPTH_BUFFER_BIT;
m_context->depthMask(true);
}
if (m_attributes.stencil) {
m_context->clearStencil(0);
clearMask |= GraphicsContext3D::STENCIL_BUFFER_BIT;
m_context->stencilMaskSeparate(GraphicsContext3D::FRONT, 0xFFFFFFFF);
}
clearFramebuffers(clearMask);
}