internal static bool IsFormatSupported(OpenGLExtensions extensions, PixelFormat format, GraphicsBackend backend)
{
switch (format)
{
case PixelFormat.ETC2_R8_G8_B8_UNorm:
case PixelFormat.ETC2_R8_G8_B8_A1_UNorm:
case PixelFormat.ETC2_R8_G8_B8_A8_UNorm:
return(extensions.GLESVersion(3, 0) || extensions.GLVersion(4, 3));
case PixelFormat.BC1_Rgb_UNorm:
case PixelFormat.BC1_Rgba_UNorm:
case PixelFormat.BC2_UNorm:
case PixelFormat.BC3_UNorm:
return(extensions.IsExtensionSupported("GL_EXT_texture_compression_s3tc"));
case PixelFormat.BC4_UNorm:
case PixelFormat.BC4_SNorm:
case PixelFormat.BC5_UNorm:
case PixelFormat.BC5_SNorm:
return(extensions.GLVersion(3, 0) || extensions.IsExtensionSupported("GL_ARB_texture_compression_rgtc"));
case PixelFormat.BC7_UNorm:
return(extensions.GLVersion(4, 2) || extensions.IsExtensionSupported("GL_ARB_texture_compression_bptc") ||
extensions.IsExtensionSupported("GL_EXT_texture_compression_bptc"));
case PixelFormat.B8_G8_R8_A8_UNorm:
case PixelFormat.B8_G8_R8_A8_UNorm_SRgb:
case PixelFormat.R10_G10_B10_A2_UInt:
case PixelFormat.R10_G10_B10_A2_UNorm:
return(backend == GraphicsBackend.OpenGL);
default:
return(true);
}
}
public OpenGLTextureSamplerManager(OpenGLExtensions extensions)
{
_dsaAvailable = extensions.ARB_DirectStateAccess;
int maxTextureUnits;
glGetIntegerv(GetPName.MaxCombinedTextureImageUnits, &maxTextureUnits);
CheckLastError();
_maxTextureUnits = Math.Max(maxTextureUnits, 8); // OpenGL spec indicates that implementations must support at least 8.
_textureUnitTextures = new OpenGLTextureView[_maxTextureUnits];
_textureUnitSamplers = new BoundSamplerStateInfo[_maxTextureUnits];
}
public OpenGLGraphicsDevice(
OpenGLPlatformInfo platformInfo,
uint width,
uint height,
bool debugDevice)
{
_glContext = platformInfo.OpenGLContextHandle;
_makeCurrent = platformInfo.MakeCurrent;
_deleteContext = platformInfo.DeleteContext;
_swapBuffers = platformInfo.SwapBuffers;
LoadAllFunctions(_glContext, platformInfo.GetProcAddress);
ResourceFactory = new OpenGLResourceFactory(this);
glGenVertexArrays(1, out _vao);
CheckLastError();
glBindVertexArray(_vao);
CheckLastError();
_swapchainFramebuffer = new OpenGLSwapchainFramebuffer(width, height);
if (debugDevice)
{
EnableDebugCallback();
}
// Set miscellaneous initial states.
glEnable(EnableCap.TextureCubeMapSeamless);
CheckLastError();
int extensionCount;
glGetIntegerv(GetPName.NumExtensions, &extensionCount);
CheckLastError();
HashSet <string> extensions = new HashSet <string>();
for (uint i = 0; i < extensionCount; i++)
{
byte *extensionNamePtr = glGetStringi(StringNameIndexed.Extensions, i);
CheckLastError();
if (extensionNamePtr != null)
{
string extensionName = Util.GetString(extensionNamePtr);
extensions.Add(extensionName);
}
}
_extensions = new OpenGLExtensions(extensions);
_commandExecutor = new OpenGLCommandExecutor(_extensions);
PostContextCreated();
}
internal static bool IsFormatSupported(OpenGLExtensions extensions, PixelFormat format)
{
switch (format)
{
case PixelFormat.ETC2_R8_G8_B8_UNorm:
case PixelFormat.ETC2_R8_G8_B8_A1_UNorm:
case PixelFormat.ETC2_R8_G8_B8_A8_UNorm:
return(extensions.GLESVersion(3, 0) || extensions.GLVersion(4, 3));
case PixelFormat.BC1_Rgb_UNorm:
case PixelFormat.BC1_Rgba_UNorm:
case PixelFormat.BC2_UNorm:
case PixelFormat.BC3_UNorm:
return(extensions.IsExtensionSupported("GL_EXT_texture_compression_s3tc"));
default:
return(true);
}
}
public OpenGLCommandExecutor(OpenGLExtensions extensions, StagingMemoryPool stagingMemoryPool)
{
_extensions = extensions;
_textureSamplerManager = new OpenGLTextureSamplerManager(extensions);
_stagingMemoryPool = stagingMemoryPool;
}
public OpenGLCommandExecutor(OpenGLExtensions extensions)
{
_extensions = extensions;
_textureSamplerManager = new OpenGLTextureSamplerManager(extensions);
}
