PassOwnPtr<GLContextEGL> GLContextEGL::createContext(EGLNativeWindowType window, GLContext* sharingContext)
{
if (!sharedEGLDisplay())
return nullptr;
static bool initialized = false;
static bool success = true;
if (!initialized) {
#if !USE(OPENGL_ES_2)
success = initializeOpenGLShims();
#endif
initialized = true;
}
if (!success)
return nullptr;
EGLContext eglSharingContext = sharingContext ? static_cast<GLContextEGL*>(sharingContext)->m_context : 0;
OwnPtr<GLContextEGL> context = window ? createWindowContext(window, sharingContext) : nullptr;
if (!context)
context = createPixmapContext(eglSharingContext);
if (!context)
context = createPbufferContext(eglSharingContext);
return context.release();
}
PassOwnPtr<GLPlatformContext> GLPlatformContext::createContext(GraphicsContext3D::RenderStyle renderStyle)
{
#if !USE(OPENGL_ES_2)
if (!initializeOpenGLShims())
return nullptr;
#endif
switch (renderStyle) {
case GraphicsContext3D::RenderOffscreen:
if (OwnPtr<GLPlatformContext> context = createOffScreenContext())
return context.release();
break;
case GraphicsContext3D::RenderToCurrentGLContext:
if (OwnPtr<GLPlatformContext> context = adoptPtr(new GLCurrentContextWrapper()))
return context.release();
break;
case GraphicsContext3D::RenderDirectlyToHostWindow:
ASSERT_NOT_REACHED();
break;
}
return nullptr;
}
static bool initializeOpenGLShimsIfNeeded()
{
#if USE(OPENGL_ES_2)
return true;
#else
static bool initialized = false;
static bool success = true;
if (!initialized) {
success = initializeOpenGLShims();
initialized = true;
}
return success;
#endif
}
PassRefPtr<GraphicsContext3D> GraphicsContext3D::create(GraphicsContext3D::Attributes attributes, HostWindow* hostWindow, GraphicsContext3D::RenderStyle renderStyle)
{
// This implementation doesn't currently support rendering directly to the HostWindow.
if (renderStyle == RenderDirectlyToHostWindow)
return 0;
static bool initialized = false;
static bool success = true;
if (!initialized) {
success = initializeOpenGLShims();
initialized = true;
}
if (!success)
return 0;
RefPtr<GraphicsContext3D> context = adoptRef(new GraphicsContext3D(attributes, hostWindow, false));
return context.release();
}
RefPtr<GraphicsContext3D> GraphicsContext3D::create(GraphicsContext3D::Attributes attributes, HostWindow* hostWindow, GraphicsContext3D::RenderStyle renderStyle)
{
// This implementation doesn't currently support rendering directly to the HostWindow.
if (renderStyle == RenderDirectlyToHostWindow)
return 0;
static bool initialized = false;
static bool success = true;
if (!initialized) {
#if !USE(OPENGL_ES_2)
success = initializeOpenGLShims();
#endif
initialized = true;
}
if (!success)
return 0;
return adoptRef(new GraphicsContext3D(attributes, hostWindow, renderStyle));
}
PassOwnPtr<GraphicsContext3DPrivate> GraphicsContext3DPrivate::create()
{
if (!sharedDisplay())
return nullptr;
static bool initialized = false;
static bool success = true;
if (!initialized) {
success = initializeOpenGLShims();
initialized = true;
}
if (!success)
return nullptr;
GraphicsContext3DPrivate* internal = createPbufferContext();
if (!internal)
internal = createPixmapContext();
if (!internal)
return nullptr;
// The GraphicsContext3D constructor requires that this context is the current OpenGL context.
internal->makeContextCurrent();
return adoptPtr(internal);
}
GraphicsContext3D::GraphicsContext3D(GraphicsContext3D::Attributes attrs, HostWindow* hostWindow, bool)
: m_currentWidth(0)
, m_currentHeight(0)
, m_attrs(attrs)
, m_texture(0)
, m_compositorTexture(0)
, m_fbo(0)
#if defined(QT_OPENGL_ES_2)
, m_depthBuffer(0)
, m_stencilBuffer(0)
#else
, m_depthStencilBuffer(0)
#endif
, m_layerComposited(false)
, m_internalColorFormat(0)
, m_boundFBO(0)
, m_activeTexture(GL_TEXTURE0)
, m_boundTexture0(0)
, m_multisampleFBO(0)
, m_multisampleDepthStencilBuffer(0)
, m_multisampleColorBuffer(0)
, m_private(adoptPtr(new GraphicsContext3DPrivate(this, hostWindow)))
{
#if !defined(QT_OPENGL_ES_2)
validateAttributes();
#endif
if (!m_private->m_surface) {
LOG_ERROR("GraphicsContext3D: QGLWidget initialization failed.");
m_private = nullptr;
return;
}
static bool initialized = false;
static bool success = true;
if (!initialized) {
success = initializeOpenGLShims();
initialized = true;
}
if (!success) {
m_private = nullptr;
return;
}
// Create buffers for the canvas FBO.
glGenFramebuffers(/* count */ 1, &m_fbo);
glGenTextures(1, &m_texture);
glBindTexture(GraphicsContext3D::TEXTURE_2D, m_texture);
glTexParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR);
glTexParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR);
glTexParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
glTexParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
glBindTexture(GraphicsContext3D::TEXTURE_2D, 0);
// Create a multisample FBO.
if (m_attrs.antialias) {
glGenFramebuffers(1, &m_multisampleFBO);
glBindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_multisampleFBO);
m_boundFBO = m_multisampleFBO;
glGenRenderbuffers(1, &m_multisampleColorBuffer);
if (m_attrs.stencil || m_attrs.depth)
glGenRenderbuffers(1, &m_multisampleDepthStencilBuffer);
} else {
// Bind canvas FBO.
glBindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_fbo);
m_boundFBO = m_fbo;
#if defined(QT_OPENGL_ES_2)
if (m_attrs.depth)
glGenRenderbuffers(1, &m_depthBuffer);
if (m_attrs.stencil)
glGenRenderbuffers(1, &m_stencilBuffer);
#else
if (m_attrs.stencil || m_attrs.depth)
glGenRenderbuffers(1, &m_depthStencilBuffer);
#endif
}
#if !defined(QT_OPENGL_ES_2)
// ANGLE initialization.
ShBuiltInResources ANGLEResources;
ShInitBuiltInResources(&ANGLEResources);
getIntegerv(GraphicsContext3D::MAX_VERTEX_ATTRIBS, &ANGLEResources.MaxVertexAttribs);
getIntegerv(GraphicsContext3D::MAX_VERTEX_UNIFORM_VECTORS, &ANGLEResources.MaxVertexUniformVectors);
getIntegerv(GraphicsContext3D::MAX_VARYING_VECTORS, &ANGLEResources.MaxVaryingVectors);
getIntegerv(GraphicsContext3D::MAX_VERTEX_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxVertexTextureImageUnits);
getIntegerv(GraphicsContext3D::MAX_COMBINED_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxCombinedTextureImageUnits);
getIntegerv(GraphicsContext3D::MAX_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxTextureImageUnits);
getIntegerv(GraphicsContext3D::MAX_FRAGMENT_UNIFORM_VECTORS, &ANGLEResources.MaxFragmentUniformVectors);
// Always set to 1 for OpenGL ES.
ANGLEResources.MaxDrawBuffers = 1;
m_compiler.setResources(ANGLEResources);
glEnable(GL_POINT_SPRITE);
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
#endif
glClearColor(0.0, 0.0, 0.0, 0.0);
}
GraphicsContext3D::GraphicsContext3D(GraphicsContext3D::Attributes attrs, HostWindow* hostWindow, GraphicsContext3D::RenderStyle renderStyle)
: m_currentWidth(0)
, m_currentHeight(0)
, m_compiler(isGLES2Compliant() ? SH_ESSL_OUTPUT : SH_GLSL_OUTPUT)
, m_attrs(attrs)
, m_renderStyle(renderStyle)
, m_texture(0)
, m_compositorTexture(0)
, m_fbo(0)
#if USE(OPENGL_ES_2)
, m_depthBuffer(0)
, m_stencilBuffer(0)
#endif
, m_depthStencilBuffer(0)
, m_layerComposited(false)
, m_internalColorFormat(0)
, m_boundFBO(0)
, m_activeTexture(GL_TEXTURE0)
, m_boundTexture0(0)
, m_multisampleFBO(0)
, m_multisampleDepthStencilBuffer(0)
, m_multisampleColorBuffer(0)
, m_private(adoptPtr(new GraphicsContext3DPrivate(this, hostWindow, renderStyle)))
{
validateAttributes();
if (!m_private)
return;
static bool initializedShims = false;
static bool success = true;
if (!initializedShims) {
success = initializeOpenGLShims();
initializedShims = true;
}
if (!success) {
m_private = nullptr;
return;
}
if (renderStyle == RenderToCurrentGLContext) {
// Evas doesn't allow including gl headers and Evas_GL headers at the same time,
// so we need to query the current gl context/surface here instead of in GraphicsContext3DPrivate.
void* currentContext = (void*)glXGetCurrentContext();
void* currentSurface = (void*)glXGetCurrentDrawable();
m_private->setCurrentGLContext(currentContext, currentSurface);
}
if (renderStyle == RenderOffscreen) {
// Create buffers for the canvas FBO.
glGenFramebuffers(/* count */ 1, &m_fbo);
// Create a texture to render into.
glGenTextures(1, &m_texture);
glBindTexture(GraphicsContext3D::TEXTURE_2D, m_texture);
glTexParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR);
glTexParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR);
glTexParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE);
glTexParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE);
glBindTexture(GraphicsContext3D::TEXTURE_2D, 0);
// Create a multisample FBO.
if (m_attrs.antialias) {
glGenFramebuffers(1, &m_multisampleFBO);
glBindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_multisampleFBO);
m_boundFBO = m_multisampleFBO;
glGenRenderbuffers(1, &m_multisampleColorBuffer);
if (m_attrs.stencil || m_attrs.depth)
glGenRenderbuffers(1, &m_multisampleDepthStencilBuffer);
} else {
// Bind canvas FBO.
glBindFramebuffer(GraphicsContext3D::FRAMEBUFFER, m_fbo);
m_boundFBO = m_fbo;
#if USE(OPENGL_ES_2)
if (m_attrs.depth)
glGenRenderbuffers(1, &m_depthBuffer);
if (m_context->m_attrs.stencil)
glGenRenderbuffers(1, &m_stencilBuffer);
#endif
if (m_attrs.stencil || m_attrs.depth)
glGenRenderbuffers(1, &m_depthStencilBuffer);
}
}
// ANGLE initialization.
ShBuiltInResources ANGLEResources;
ShInitBuiltInResources(&ANGLEResources);
getIntegerv(GraphicsContext3D::MAX_VERTEX_ATTRIBS, &ANGLEResources.MaxVertexAttribs);
getIntegerv(GraphicsContext3D::MAX_VERTEX_UNIFORM_VECTORS, &ANGLEResources.MaxVertexUniformVectors);
getIntegerv(GraphicsContext3D::MAX_VARYING_VECTORS, &ANGLEResources.MaxVaryingVectors);
getIntegerv(GraphicsContext3D::MAX_VERTEX_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxVertexTextureImageUnits);
getIntegerv(GraphicsContext3D::MAX_COMBINED_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxCombinedTextureImageUnits);
getIntegerv(GraphicsContext3D::MAX_TEXTURE_IMAGE_UNITS, &ANGLEResources.MaxTextureImageUnits);
getIntegerv(GraphicsContext3D::MAX_FRAGMENT_UNIFORM_VECTORS, &ANGLEResources.MaxFragmentUniformVectors);
// Always set to 1 for OpenGL ES.
ANGLEResources.MaxDrawBuffers = 1;
m_compiler.setResources(ANGLEResources);
#if !USE(OPENGL_ES_2)
glEnable(GL_POINT_SPRITE);
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
#endif
}
