bool DrawingBuffer::resizeDefaultFramebuffer(const IntSize& size)
{
// Resize or create m_colorBuffer.
if (m_colorBuffer.textureId) {
resizeTextureMemory(&m_colorBuffer, size);
} else {
m_colorBuffer = createTextureAndAllocateMemory(size);
}
attachColorBufferToReadFramebuffer();
if (wantExplicitResolve()) {
if (!resizeMultisampleFramebuffer(size))
return false;
}
if (wantDepthOrStencil())
resizeDepthStencil(size);
if (wantExplicitResolve()) {
m_gl->BindFramebuffer(GL_FRAMEBUFFER, m_multisampleFBO);
if (m_gl->CheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
return false;
}
m_gl->BindFramebuffer(GL_FRAMEBUFFER, m_fbo);
return m_gl->CheckFramebufferStatus(GL_FRAMEBUFFER) == GL_FRAMEBUFFER_COMPLETE;
}
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);
}
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);
}
