bool EnvironmentEs::supportsInstancedArrays() const
{
#if defined( CINDER_GL_ES_2 )
static bool result = isExtensionAvailable( "GL_EXT_draw_instanced" ) || isExtensionAvailable( "GL_NV_draw_instanced" );
return result;
#else
return true;
#endif
}
bool EnvironmentEs::supportsHardwareVao() const
{
#if defined( CINDER_GL_ES_2 )
static bool result = isExtensionAvailable( "GL_OES_vertex_array_object" ) || isExtensionAvailable( "GL_ARB_vertex_array_object" );
return result;
#else
// Assumes OpenGL ES 3 or greater
return true;
#endif
}
GLenum EnvironmentEs::getPreferredIndexType() const
{
#if defined( CINDER_GL_ES_2 )
return isExtensionAvailable( "GL_OES_element_index_uint" ) ? GL_UNSIGNED_INT : GL_UNSIGNED_SHORT;
#else
return GL_UNSIGNED_INT;
#endif
}
void TGen::OpenGL::Renderer::checkCompatibility() {
bool compatible = true;
if (!isExtensionAvailable("GL_ARB_vertex_buffer_object"))
compatible = false;
if (!compatible)
throw TGen::RuntimeException("OpenGL::Renderer::CheckCompatibility", "not compatible!");
}
bool EnvironmentEs::supportsTextureLod() const
{
#if defined( CINDER_COCOA_TOUCH ) || defined( CINDER_GL_ES_3 )
return true;
#else
static bool result = isExtensionAvailable( "GL_EXT_shader_texture_lod" );
return result;
#endif
}
void TGen::OpenGL::Renderer::readCaps() {
GLint viewportDims[2];
glGetIntegerv(GL_MAX_TEXTURE_UNITS , reinterpret_cast<GLint *>(&caps.maxTextureUnits));
glGetIntegerv(GL_MAX_LIGHTS, reinterpret_cast<GLint *>(&caps.maxActiveLights));
glGetIntegerv(GL_MAX_CLIP_PLANES, reinterpret_cast<GLint *>(&caps.maxClipPlanes));
glGetIntegerv(GL_MAX_ELEMENTS_INDICES, reinterpret_cast<GLint *>(&caps.maxIndexBufferIndicies));
glGetIntegerv(GL_MAX_ELEMENTS_VERTICES, reinterpret_cast<GLint *>(&caps.maxVertexBufferVertices));
glGetIntegerv(GL_MAX_TEXTURE_SIZE, reinterpret_cast<GLint *>(&caps.maxTextureSize));
glGetIntegerv(GL_MAX_VIEWPORT_DIMS, viewportDims);
glGetIntegerv(GL_MAX_COLOR_ATTACHMENTS_EXT, reinterpret_cast<GLint *>(&caps.maxFrameBufferColorAttachments));
glGetIntegerv(GL_MAX_GEOMETRY_OUTPUT_VERTICES_EXT, reinterpret_cast<GLint *>(&caps.maxGeometryVerticesOutput));
#if 0 //defined(_PLATFORM_OSX)
glClear(GL_COLOR_BUFFER_BIT);
CGLError err;
CGLContextObj ctx = CGLGetCurrentContext();
err = CGLEnable(ctx, kCGLCEMPEngine); // TODO: disable/enable mt ogl engine
caps.multithreadable = (err == kCGLNoError);
#else
caps.multithreadable = false;
#endif
caps.maxViewportSize = TGen::Rectangle(viewportDims[0], viewportDims[1]);
if (glGetString(GL_SHADING_LANGUAGE_VERSION))
caps.shadingLanguageVersion = (char *)(glGetString(GL_SHADING_LANGUAGE_VERSION));
else
caps.shadingLanguageVersion = "N/A";
caps.driverName = "OpenGL ";
caps.driverName += (char *)glGetString(GL_VERSION);
caps.rendererName = (char *)glGetString(GL_RENDERER);
caps.driverVendor = (char *)glGetString(GL_VENDOR);
caps.vertexShader = isExtensionAvailable("GL_ARB_vertex_shader");
caps.fragmentShader = isExtensionAvailable("GL_ARB_fragment_shader");
caps.geometryShader = isExtensionAvailable("GL_EXT_geometry_shader4");
caps.framebuffer = isExtensionAvailable("GL_EXT_framebuffer_object");
caps.multitexturing = isExtensionAvailable("GL_ARB_multitexture");
caps.rectTexture = isExtensionAvailable("GL_ARB_texture_rectangle");
caps.cubeMaps = isExtensionAvailable("GL_ARB_texture_cube_map");
}
bool EnvironmentEs::supportsTessellationShader() const
{
static bool result = isExtensionAvailable( "GL_EXT_tessellation_shader" );
return result;
}
bool EnvironmentEs::supportsGeometryShader() const
{
static bool result = isExtensionAvailable( "GL_EXT_geometry_shader" );
return result;
}