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 attributes, HostWindow*, GraphicsContext3D::RenderStyle renderStyle)
: m_currentWidth(0)
, m_currentHeight(0)
, m_attrs(attributes)
, m_texture(0)
, m_fbo(0)
, m_depthStencilBuffer(0)
, m_multisampleFBO(0)
, m_multisampleDepthStencilBuffer(0)
, m_multisampleColorBuffer(0)
, m_private(GraphicsContext3DPrivate::create(this, renderStyle))
{
makeContextCurrent();
validateAttributes();
if (renderStyle == RenderOffscreen) {
// Create a texture to render into.
::glGenTextures(1, &m_texture);
::glBindTexture(GL_TEXTURE_2D, m_texture);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
::glBindTexture(GL_TEXTURE_2D, 0);
// Create an FBO.
::glGenFramebuffers(1, &m_fbo);
::glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
m_state.boundFBO = m_fbo;
if (!m_attrs.antialias && (m_attrs.stencil || m_attrs.depth))
::glGenRenderbuffers(1, &m_depthStencilBuffer);
// Create a multisample FBO.
if (m_attrs.antialias) {
::glGenFramebuffers(1, &m_multisampleFBO);
::glBindFramebuffer(GL_FRAMEBUFFER, m_multisampleFBO);
m_state.boundFBO = m_multisampleFBO;
::glGenRenderbuffers(1, &m_multisampleColorBuffer);
if (m_attrs.stencil || m_attrs.depth)
::glGenRenderbuffers(1, &m_multisampleDepthStencilBuffer);
}
}
// 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;
GC3Dint range[2], precision;
getShaderPrecisionFormat(GraphicsContext3D::FRAGMENT_SHADER, GraphicsContext3D::HIGH_FLOAT, range, &precision);
ANGLEResources.FragmentPrecisionHigh = (range[0] || range[1] || precision);
m_compiler.setResources(ANGLEResources);
#if !USE(OPENGL_ES_2)
::glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
::glEnable(GL_POINT_SPRITE);
#endif
::glClearColor(0, 0, 0, 0);
}
GraphicsContext3D::GraphicsContext3D(GraphicsContext3D::Attributes attrs, HostWindow*, GraphicsContext3D::RenderStyle renderStyle)
: m_currentWidth(0)
, m_currentHeight(0)
, m_context(BlackBerry::Platform::Graphics::createWebGLContext())
, m_compiler(SH_ESSL_OUTPUT)
, m_attrs(attrs)
, m_texture(0)
, m_fbo(0)
, m_depthStencilBuffer(0)
, m_layerComposited(false)
, m_internalColorFormat(GL_RGBA)
, m_isImaginationHardware(0)
{
if (renderStyle != RenderDirectlyToHostWindow) {
#if USE(ACCELERATED_COMPOSITING)
m_compositingLayer = WebGLLayerWebKitThread::create();
#endif
makeContextCurrent();
// Create a texture to render into.
::glGenTextures(1, &m_texture);
::glBindTexture(GL_TEXTURE_2D, m_texture);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
::glBindTexture(GL_TEXTURE_2D, 0);
// Create an FBO.
::glGenFramebuffers(1, &m_fbo);
::glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
if (m_attrs.stencil || m_attrs.depth)
::glGenRenderbuffers(1, &m_depthStencilBuffer);
m_state.boundFBO = m_fbo;
#if USE(ACCELERATED_COMPOSITING)
static_cast<WebGLLayerWebKitThread*>(m_compositingLayer.get())->setWebGLContext(this);
#endif
}
makeContextCurrent();
const char* renderer = reinterpret_cast<const char*>(::glGetString(GL_RENDERER));
m_isImaginationHardware = std::strstr(renderer, "PowerVR SGX");
// 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);
GC3Dint range[2], precision;
getShaderPrecisionFormat(GraphicsContext3D::FRAGMENT_SHADER, GraphicsContext3D::HIGH_FLOAT, range, &precision);
ANGLEResources.FragmentPrecisionHigh = (range[0] || range[1] || precision);
m_compiler.setResources(ANGLEResources);
::glClearColor(0, 0, 0, 0);
}
GraphicsContext3D::GraphicsContext3D(GraphicsContext3D::Attributes attributes, HostWindow*, bool)
: m_currentWidth(0)
, m_currentHeight(0)
, m_attrs(attributes)
, m_texture(0)
, m_fbo(0)
, m_depthStencilBuffer(0)
, m_boundFBO(0)
, m_activeTexture(GL_TEXTURE0)
, m_boundTexture0(0)
, m_multisampleFBO(0)
, m_multisampleDepthStencilBuffer(0)
, m_multisampleColorBuffer(0)
, m_private(GraphicsContext3DPrivate::create(this))
{
makeContextCurrent();
validateAttributes();
// Create a texture to render into.
::glGenTextures(1, &m_texture);
::glBindTexture(GL_TEXTURE_2D, m_texture);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
::glBindTexture(GL_TEXTURE_2D, 0);
// Create an FBO.
::glGenFramebuffersEXT(1, &m_fbo);
::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fbo);
m_boundFBO = m_fbo;
if (!m_attrs.antialias && (m_attrs.stencil || m_attrs.depth))
::glGenRenderbuffersEXT(1, &m_depthStencilBuffer);
// Create a multisample FBO.
if (m_attrs.antialias) {
::glGenFramebuffersEXT(1, &m_multisampleFBO);
::glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_multisampleFBO);
m_boundFBO = m_multisampleFBO;
::glGenRenderbuffersEXT(1, &m_multisampleColorBuffer);
if (m_attrs.stencil || m_attrs.depth)
::glGenRenderbuffersEXT(1, &m_multisampleDepthStencilBuffer);
}
// 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_VERTEX_PROGRAM_POINT_SIZE);
::glEnable(GL_POINT_SPRITE);
::glClearColor(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_multisampleFBO(0)
, m_multisampleDepthStencilBuffer(0)
, m_multisampleColorBuffer(0)
, m_private(GraphicsContext3DPrivate::create(this, hostWindow))
{
if (!m_private)
return;
validateAttributes();
if (renderStyle == RenderOffscreen) {
// Create buffers for the canvas FBO.
glGenFramebuffers(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_state.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_state.boundFBO = m_fbo;
#if USE(OPENGL_ES_2)
if (m_attrs.depth)
glGenRenderbuffers(1, &m_depthBuffer);
if (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;
GC3Dint range[2], precision;
getShaderPrecisionFormat(GraphicsContext3D::FRAGMENT_SHADER, GraphicsContext3D::HIGH_FLOAT, range, &precision);
ANGLEResources.FragmentPrecisionHigh = (range[0] || range[1] || precision);
m_compiler.setResources(ANGLEResources);
#if !USE(OPENGL_ES_2)
glEnable(GL_POINT_SPRITE);
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
#endif
if (renderStyle != RenderToCurrentGLContext)
glClearColor(0.0, 0.0, 0.0, 0.0);
}
inline std::array<GLint, N> getIntegers(GLenum const pname)
{
std::array<GLint, N> params;
getIntegerv(pname, params.data());
return params;
}
//! Convenience.
inline GLint getInteger(GLenum const pname)
{
GLint param = 0;
getIntegerv(pname, ¶m);
return param;
}
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
}
GraphicsContext3D::GraphicsContext3D(GraphicsContext3DAttributes attributes, HostWindow*, GraphicsContext3D::RenderStyle renderStyle)
: m_currentWidth(0)
, m_currentHeight(0)
, m_attrs(attributes)
, m_texture(0)
, m_compositorTexture(0)
, m_fbo(0)
#if USE(COORDINATED_GRAPHICS_THREADED)
, m_intermediateTexture(0)
#endif
, m_depthStencilBuffer(0)
, m_layerComposited(false)
, m_multisampleFBO(0)
, m_multisampleDepthStencilBuffer(0)
, m_multisampleColorBuffer(0)
, m_private(std::make_unique<GraphicsContext3DPrivate>(this, renderStyle))
{
makeContextCurrent();
validateAttributes();
if (renderStyle == RenderOffscreen) {
// Create a texture to render into.
::glGenTextures(1, &m_texture);
::glBindTexture(GL_TEXTURE_2D, m_texture);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
::glBindTexture(GL_TEXTURE_2D, 0);
// Create an FBO.
::glGenFramebuffers(1, &m_fbo);
::glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
#if USE(COORDINATED_GRAPHICS_THREADED)
::glGenTextures(1, &m_compositorTexture);
::glBindTexture(GL_TEXTURE_2D, m_compositorTexture);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
::glGenTextures(1, &m_intermediateTexture);
::glBindTexture(GL_TEXTURE_2D, m_intermediateTexture);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
::glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
::glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
::glBindTexture(GL_TEXTURE_2D, 0);
#endif
m_state.boundFBO = m_fbo;
if (!m_attrs.antialias && (m_attrs.stencil || m_attrs.depth))
::glGenRenderbuffers(1, &m_depthStencilBuffer);
// Create a multisample FBO.
if (m_attrs.antialias) {
::glGenFramebuffers(1, &m_multisampleFBO);
::glBindFramebuffer(GL_FRAMEBUFFER, m_multisampleFBO);
m_state.boundFBO = m_multisampleFBO;
::glGenRenderbuffers(1, &m_multisampleColorBuffer);
if (m_attrs.stencil || m_attrs.depth)
::glGenRenderbuffers(1, &m_multisampleDepthStencilBuffer);
}
}
#if !USE(OPENGL_ES_2)
::glEnable(GL_VERTEX_PROGRAM_POINT_SIZE);
if (GLContext::current()->version() >= 320) {
// From version 3.2 on we use the OpenGL Core profile, so request that ouput to the shader compiler.
// OpenGL version 3.2 uses GLSL version 1.50.
m_compiler = ANGLEWebKitBridge(SH_GLSL_150_CORE_OUTPUT);
// From version 3.2 on we use the OpenGL Core profile, and we need a VAO for rendering.
// A VAO could be created and bound by each component using GL rendering (TextureMapper, WebGL, etc). This is
// a simpler solution: the first GraphicsContext3D created on a GLContext will create and bind a VAO for that context.
GC3Dint currentVAO = 0;
getIntegerv(GraphicsContext3D::VERTEX_ARRAY_BINDING, ¤tVAO);
if (!currentVAO) {
m_vao = createVertexArray();
bindVertexArray(m_vao);
}
} else {
// For lower versions request the compatibility output to the shader compiler.
m_compiler = ANGLEWebKitBridge(SH_GLSL_COMPATIBILITY_OUTPUT);
// GL_POINT_SPRITE is needed in lower versions.
::glEnable(GL_POINT_SPRITE);
}
#else
m_compiler = ANGLEWebKitBridge(SH_ESSL_OUTPUT);
#endif
// 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;
GC3Dint range[2], precision;
getShaderPrecisionFormat(GraphicsContext3D::FRAGMENT_SHADER, GraphicsContext3D::HIGH_FLOAT, range, &precision);
ANGLEResources.FragmentPrecisionHigh = (range[0] || range[1] || precision);
m_compiler.setResources(ANGLEResources);
::glClearColor(0, 0, 0, 0);
}