void GenerateCaps(IDirect3D9 *d3d9, IDirect3DDevice9 *device, D3DDEVTYPE deviceType, UINT adapter, gl::Caps *caps,
gl::TextureCapsMap *textureCapsMap, gl::Extensions *extensions)
{
D3DCAPS9 deviceCaps;
if (FAILED(d3d9->GetDeviceCaps(adapter, deviceType, &deviceCaps)))
{
// Can't continue with out device caps
return;
}
D3DDISPLAYMODE currentDisplayMode;
d3d9->GetAdapterDisplayMode(adapter, ¤tDisplayMode);
GLuint maxSamples = 0;
const gl::FormatSet &allFormats = gl::GetAllSizedInternalFormats();
for (gl::FormatSet::const_iterator internalFormat = allFormats.begin(); internalFormat != allFormats.end(); ++internalFormat)
{
gl::TextureCaps textureCaps = GenerateTextureFormatCaps(*internalFormat, d3d9, deviceType, adapter,
currentDisplayMode.Format);
textureCapsMap->insert(*internalFormat, textureCaps);
maxSamples = std::max(maxSamples, textureCaps.getMaxSamples());
if (gl::GetInternalFormatInfo(*internalFormat).compressed)
{
caps->compressedTextureFormats.push_back(*internalFormat);
}
}
// GL core feature limits
caps->maxElementIndex = static_cast<GLint64>(std::numeric_limits<unsigned int>::max());
// 3D textures are unimplemented in D3D9
caps->max3DTextureSize = 1;
// Only one limit in GL, use the minimum dimension
caps->max2DTextureSize = std::min(deviceCaps.MaxTextureWidth, deviceCaps.MaxTextureHeight);
// D3D treats cube maps as a special case of 2D textures
caps->maxCubeMapTextureSize = caps->max2DTextureSize;
// Array textures are not available in D3D9
caps->maxArrayTextureLayers = 1;
// ES3-only feature
caps->maxLODBias = 0.0f;
// No specific limits on render target size, maximum 2D texture size is equivalent
caps->maxRenderbufferSize = caps->max2DTextureSize;
// Draw buffers are not supported in D3D9
caps->maxDrawBuffers = 1;
caps->maxColorAttachments = 1;
// No specific limits on viewport size, maximum 2D texture size is equivalent
caps->maxViewportWidth = caps->max2DTextureSize;
caps->maxViewportHeight = caps->maxViewportWidth;
// Point size is clamped to 1.0f when the shader model is less than 3
caps->minAliasedPointSize = 1.0f;
caps->maxAliasedPointSize = ((D3DSHADER_VERSION_MAJOR(deviceCaps.PixelShaderVersion) >= 3) ? deviceCaps.MaxPointSize : 1.0f);
// Wide lines not supported
caps->minAliasedLineWidth = 1.0f;
caps->maxAliasedLineWidth = 1.0f;
// Primitive count limits (unused in ES2)
caps->maxElementsIndices = 0;
caps->maxElementsVertices = 0;
// Program and shader binary formats (no supported shader binary formats)
caps->programBinaryFormats.push_back(GL_PROGRAM_BINARY_ANGLE);
caps->vertexHighpFloat.setIEEEFloat();
caps->vertexMediumpFloat.setIEEEFloat();
caps->vertexLowpFloat.setIEEEFloat();
caps->fragmentHighpFloat.setIEEEFloat();
caps->fragmentMediumpFloat.setIEEEFloat();
caps->fragmentLowpFloat.setIEEEFloat();
// Some (most) hardware only supports single-precision floating-point numbers,
// which can accurately represent integers up to +/-16777216
caps->vertexHighpInt.setSimulatedInt(24);
caps->vertexMediumpInt.setSimulatedInt(24);
caps->vertexLowpInt.setSimulatedInt(24);
caps->fragmentHighpInt.setSimulatedInt(24);
caps->fragmentMediumpInt.setSimulatedInt(24);
caps->fragmentLowpInt.setSimulatedInt(24);
// WaitSync is ES3-only, set to zero
caps->maxServerWaitTimeout = 0;
// Vertex shader limits
caps->maxVertexAttributes = 16;
const size_t reservedVertexUniformVectors = 2; // dx_ViewAdjust and dx_DepthRange.
const size_t MAX_VERTEX_CONSTANT_VECTORS_D3D9 = 256;
caps->maxVertexUniformVectors = MAX_VERTEX_CONSTANT_VECTORS_D3D9 - reservedVertexUniformVectors;
caps->maxVertexUniformComponents = caps->maxVertexUniformVectors * 4;
caps->maxVertexUniformBlocks = 0;
// SM3 only supports 11 output variables, with a special 12th register for PSIZE.
const size_t MAX_VERTEX_OUTPUT_VECTORS_SM3 = 9;
const size_t MAX_VERTEX_OUTPUT_VECTORS_SM2 = 7;
caps->maxVertexOutputComponents = ((deviceCaps.VertexShaderVersion >= D3DVS_VERSION(3, 0)) ? MAX_VERTEX_OUTPUT_VECTORS_SM3
: MAX_VERTEX_OUTPUT_VECTORS_SM2) * 4;
// Only Direct3D 10 ready devices support all the necessary vertex texture formats.
// We test this using D3D9 by checking support for the R16F format.
if (deviceCaps.VertexShaderVersion >= D3DVS_VERSION(3, 0) &&
SUCCEEDED(d3d9->CheckDeviceFormat(adapter, deviceType, currentDisplayMode.Format,
D3DUSAGE_QUERY_VERTEXTEXTURE, D3DRTYPE_TEXTURE, D3DFMT_R16F)))
{
const size_t MAX_TEXTURE_IMAGE_UNITS_VTF_SM3 = 4;
caps->maxVertexTextureImageUnits = MAX_TEXTURE_IMAGE_UNITS_VTF_SM3;
}
else
{
caps->maxVertexTextureImageUnits = 0;
}
// Fragment shader limits
const size_t reservedPixelUniformVectors = 3; // dx_ViewCoords, dx_DepthFront and dx_DepthRange.
const size_t MAX_PIXEL_CONSTANT_VECTORS_SM3 = 224;
const size_t MAX_PIXEL_CONSTANT_VECTORS_SM2 = 32;
caps->maxFragmentUniformVectors = ((deviceCaps.PixelShaderVersion >= D3DPS_VERSION(3, 0)) ? MAX_PIXEL_CONSTANT_VECTORS_SM3
: MAX_PIXEL_CONSTANT_VECTORS_SM2) - reservedPixelUniformVectors;
caps->maxFragmentUniformComponents = caps->maxFragmentUniformVectors * 4;
caps->maxFragmentUniformBlocks = 0;
caps->maxFragmentInputComponents = caps->maxVertexOutputComponents;
caps->maxTextureImageUnits = 16;
caps->minProgramTexelOffset = 0;
caps->maxProgramTexelOffset = 0;
// Aggregate shader limits (unused in ES2)
caps->maxUniformBufferBindings = 0;
caps->maxUniformBlockSize = 0;
caps->uniformBufferOffsetAlignment = 0;
caps->maxCombinedUniformBlocks = 0;
caps->maxCombinedVertexUniformComponents = 0;
caps->maxCombinedFragmentUniformComponents = 0;
caps->maxVaryingComponents = 0;
// Aggregate shader limits
caps->maxVaryingVectors = caps->maxVertexOutputComponents / 4;
caps->maxCombinedTextureImageUnits = caps->maxVertexTextureImageUnits + caps->maxTextureImageUnits;
// Transform feedback limits
caps->maxTransformFeedbackInterleavedComponents = 0;
caps->maxTransformFeedbackSeparateAttributes = 0;
caps->maxTransformFeedbackSeparateComponents = 0;
// Multisample limits
caps->maxSamples = maxSamples;
// GL extension support
extensions->setTextureExtensionSupport(*textureCapsMap);
extensions->elementIndexUint = deviceCaps.MaxVertexIndex >= (1 << 16);
extensions->getProgramBinary = true;
extensions->rgb8rgba8 = true;
extensions->readFormatBGRA = true;
extensions->pixelBufferObject = false;
extensions->mapBuffer = false;
extensions->mapBufferRange = false;
// textureRG is emulated and not performant.
extensions->textureRG = false;
D3DADAPTER_IDENTIFIER9 adapterId = {};
if (SUCCEEDED(d3d9->GetAdapterIdentifier(adapter, 0, &adapterId)))
{
// ATI cards on XP have problems with non-power-of-two textures.
extensions->textureNPOT = !(deviceCaps.TextureCaps & D3DPTEXTURECAPS_POW2) &&
!(deviceCaps.TextureCaps & D3DPTEXTURECAPS_CUBEMAP_POW2) &&
!(deviceCaps.TextureCaps & D3DPTEXTURECAPS_NONPOW2CONDITIONAL) &&
!(!isWindowsVistaOrGreater() && adapterId.VendorId == VENDOR_ID_AMD);
// Disable depth texture support on AMD cards (See ANGLE issue 839)
if (adapterId.VendorId == VENDOR_ID_AMD)
{
extensions->depthTextures = false;
}
}
else
{
extensions->textureNPOT = false;
}
extensions->drawBuffers = false;
extensions->textureStorage = true;
// Must support a minimum of 2:1 anisotropy for max anisotropy to be considered supported, per the spec
extensions->textureFilterAnisotropic = (deviceCaps.RasterCaps & D3DPRASTERCAPS_ANISOTROPY) != 0 && deviceCaps.MaxAnisotropy >= 2;
extensions->maxTextureAnisotropy = static_cast<GLfloat>(deviceCaps.MaxAnisotropy);
// Check occlusion query support by trying to create one
IDirect3DQuery9 *occlusionQuery = NULL;
extensions->occlusionQueryBoolean = SUCCEEDED(device->CreateQuery(D3DQUERYTYPE_OCCLUSION, &occlusionQuery)) && occlusionQuery;
SafeRelease(occlusionQuery);
// Check event query support by trying to create one
IDirect3DQuery9 *eventQuery = NULL;
extensions->fence = SUCCEEDED(device->CreateQuery(D3DQUERYTYPE_EVENT, &eventQuery)) && eventQuery;
SafeRelease(eventQuery);
extensions->timerQuery = false; // Unimplemented
extensions->robustness = true;
extensions->blendMinMax = true;
extensions->framebufferBlit = true;
extensions->framebufferMultisample = true;
extensions->instancedArrays = deviceCaps.PixelShaderVersion >= D3DPS_VERSION(3, 0);
extensions->packReverseRowOrder = true;
extensions->standardDerivatives = (deviceCaps.PS20Caps.Caps & D3DPS20CAPS_GRADIENTINSTRUCTIONS) != 0;
extensions->shaderTextureLOD = true;
extensions->fragDepth = true;
extensions->textureUsage = true;
extensions->translatedShaderSource = true;
extensions->fboRenderMipmap = false;
extensions->discardFramebuffer = false; // It would be valid to set this to true, since glDiscardFramebufferEXT is just a hint
extensions->colorBufferFloat = false;
extensions->debugMarker = true;
}
void GenerateCaps(const FunctionsGL *functions, gl::Caps *caps, gl::TextureCapsMap *textureCapsMap,
gl::Extensions *extensions, gl::Version *maxSupportedESVersion)
{
// Texture format support checks
const gl::FormatSet &allFormats = gl::GetAllSizedInternalFormats();
for (GLenum internalFormat : allFormats)
{
gl::TextureCaps textureCaps = GenerateTextureFormatCaps(functions, internalFormat);
textureCapsMap->insert(internalFormat, textureCaps);
if (gl::GetInternalFormatInfo(internalFormat).compressed)
{
caps->compressedTextureFormats.push_back(internalFormat);
}
}
// Start by assuming ES3 support and work down
*maxSupportedESVersion = gl::Version(3, 0);
// Table 6.28, implementation dependent values
if (functions->isAtLeastGL(gl::Version(4, 3)) || functions->hasGLExtension("GL_ARB_ES3_compatibility") ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxElementIndex = QuerySingleGLInt64(functions, GL_MAX_ELEMENT_INDEX);
}
else
{
// Doesn't affect ES3 support, can use a pre-defined limit
caps->maxElementIndex = static_cast<GLint64>(std::numeric_limits<unsigned int>::max());
}
if (functions->isAtLeastGL(gl::Version(1, 2)) ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_OES_texture_3D"))
{
caps->max3DTextureSize = QuerySingleGLInt(functions, GL_MAX_3D_TEXTURE_SIZE);
}
else
{
// Can't support ES3 without 3D textures
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
caps->max2DTextureSize = QuerySingleGLInt(functions, GL_MAX_TEXTURE_SIZE); // GL 1.0 / ES 2.0
caps->maxCubeMapTextureSize = QuerySingleGLInt(functions, GL_MAX_CUBE_MAP_TEXTURE_SIZE); // GL 1.3 / ES 2.0
if (functions->isAtLeastGL(gl::Version(3, 0)) || functions->hasGLExtension("GL_EXT_texture_array") ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxArrayTextureLayers = QuerySingleGLInt(functions, GL_MAX_ARRAY_TEXTURE_LAYERS);
}
else
{
// Can't support ES3 without array textures
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
if (functions->isAtLeastGL(gl::Version(1, 5)) || functions->hasGLExtension("GL_EXT_texture_lod_bias") ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxLODBias = QuerySingleGLFloat(functions, GL_MAX_TEXTURE_LOD_BIAS);
}
else
{
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
if (functions->isAtLeastGL(gl::Version(3, 0)) || functions->hasGLExtension("GL_EXT_framebuffer_object") ||
functions->isAtLeastGLES(gl::Version(2, 0)))
{
caps->maxRenderbufferSize = QuerySingleGLInt(functions, GL_MAX_RENDERBUFFER_SIZE);
caps->maxColorAttachments = QuerySingleGLInt(functions, GL_MAX_COLOR_ATTACHMENTS);
}
else
{
// Can't support ES2 without framebuffers and renderbuffers
LimitVersion(maxSupportedESVersion, gl::Version(0, 0));
}
if (functions->isAtLeastGL(gl::Version(2, 0)) || functions->hasGLExtension("ARB_draw_buffers") ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_EXT_draw_buffers"))
{
caps->maxDrawBuffers = QuerySingleGLInt(functions, GL_MAX_DRAW_BUFFERS);
}
else
{
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
caps->maxViewportWidth = QueryGLIntRange(functions, GL_MAX_VIEWPORT_DIMS, 0); // GL 1.0 / ES 2.0
caps->maxViewportHeight = QueryGLIntRange(functions, GL_MAX_VIEWPORT_DIMS, 1); // GL 1.0 / ES 2.0
if (functions->standard == STANDARD_GL_DESKTOP &&
(functions->profile & GL_CONTEXT_CORE_PROFILE_BIT) != 0)
{
// Desktop GL core profile deprecated the GL_ALIASED_POINT_SIZE_RANGE query. Use
// GL_POINT_SIZE_RANGE instead.
caps->minAliasedPointSize = QueryGLFloatRange(functions, GL_POINT_SIZE_RANGE, 0);
caps->maxAliasedPointSize = QueryGLFloatRange(functions, GL_POINT_SIZE_RANGE, 1);
}
else
{
caps->minAliasedPointSize = QueryGLFloatRange(functions, GL_ALIASED_POINT_SIZE_RANGE, 0);
caps->maxAliasedPointSize = QueryGLFloatRange(functions, GL_ALIASED_POINT_SIZE_RANGE, 1);
}
caps->minAliasedLineWidth = QueryGLFloatRange(functions, GL_ALIASED_LINE_WIDTH_RANGE, 0); // GL 1.2 / ES 2.0
caps->maxAliasedLineWidth = QueryGLFloatRange(functions, GL_ALIASED_LINE_WIDTH_RANGE, 1); // GL 1.2 / ES 2.0
// Table 6.29, implementation dependent values (cont.)
if (functions->isAtLeastGL(gl::Version(1, 2)) ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxElementsIndices = QuerySingleGLInt(functions, GL_MAX_ELEMENTS_INDICES);
caps->maxElementsVertices = QuerySingleGLInt(functions, GL_MAX_ELEMENTS_VERTICES);
}
else
{
// Doesn't impact supported version
}
// glGetShaderPrecisionFormat is not available until desktop GL version 4.1 or GL_ARB_ES2_compatibility exists
if (functions->isAtLeastGL(gl::Version(4, 1)) || functions->hasGLExtension("GL_ARB_ES2_compatibility") ||
functions->isAtLeastGLES(gl::Version(2, 0)))
{
caps->vertexHighpFloat = QueryTypePrecision(functions, GL_VERTEX_SHADER, GL_HIGH_FLOAT);
caps->vertexMediumpFloat = QueryTypePrecision(functions, GL_VERTEX_SHADER, GL_MEDIUM_FLOAT);
caps->vertexLowpFloat = QueryTypePrecision(functions, GL_VERTEX_SHADER, GL_LOW_FLOAT);
caps->fragmentHighpFloat = QueryTypePrecision(functions, GL_FRAGMENT_SHADER, GL_HIGH_FLOAT);
caps->fragmentMediumpFloat = QueryTypePrecision(functions, GL_FRAGMENT_SHADER, GL_MEDIUM_FLOAT);
caps->fragmentLowpFloat = QueryTypePrecision(functions, GL_FRAGMENT_SHADER, GL_LOW_FLOAT);
caps->vertexHighpInt = QueryTypePrecision(functions, GL_VERTEX_SHADER, GL_HIGH_INT);
caps->vertexMediumpInt = QueryTypePrecision(functions, GL_VERTEX_SHADER, GL_MEDIUM_INT);
caps->vertexLowpInt = QueryTypePrecision(functions, GL_VERTEX_SHADER, GL_LOW_INT);
caps->fragmentHighpInt = QueryTypePrecision(functions, GL_FRAGMENT_SHADER, GL_HIGH_INT);
caps->fragmentMediumpInt = QueryTypePrecision(functions, GL_FRAGMENT_SHADER, GL_MEDIUM_INT);
caps->fragmentLowpInt = QueryTypePrecision(functions, GL_FRAGMENT_SHADER, GL_LOW_INT);
}
else
{
// Doesn't impact supported version, set some default values
caps->vertexHighpFloat.setIEEEFloat();
caps->vertexMediumpFloat.setIEEEFloat();
caps->vertexLowpFloat.setIEEEFloat();
caps->fragmentHighpFloat.setIEEEFloat();
caps->fragmentMediumpFloat.setIEEEFloat();
caps->fragmentLowpFloat.setIEEEFloat();
caps->vertexHighpInt.setTwosComplementInt(32);
caps->vertexMediumpInt.setTwosComplementInt(32);
caps->vertexLowpInt.setTwosComplementInt(32);
caps->fragmentHighpInt.setTwosComplementInt(32);
caps->fragmentMediumpInt.setTwosComplementInt(32);
caps->fragmentLowpInt.setTwosComplementInt(32);
}
if (functions->isAtLeastGL(gl::Version(3, 2)) || functions->hasGLExtension("GL_ARB_sync") ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxServerWaitTimeout = QuerySingleGLInt64(functions, GL_MAX_SERVER_WAIT_TIMEOUT);
}
else
{
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
// Table 6.31, implementation dependent vertex shader limits
if (functions->isAtLeastGL(gl::Version(2, 0)) ||
functions->isAtLeastGLES(gl::Version(2, 0)))
{
caps->maxVertexAttributes = QuerySingleGLInt(functions, GL_MAX_VERTEX_ATTRIBS);
caps->maxVertexUniformComponents = QuerySingleGLInt(functions, GL_MAX_VERTEX_UNIFORM_COMPONENTS);
caps->maxVertexTextureImageUnits = QuerySingleGLInt(functions, GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS);
}
else
{
// Can't support ES2 version without these caps
LimitVersion(maxSupportedESVersion, gl::Version(0, 0));
}
if (functions->isAtLeastGL(gl::Version(4, 1)) || functions->hasGLExtension("GL_ARB_ES2_compatibility") ||
functions->isAtLeastGLES(gl::Version(2, 0)))
{
caps->maxVertexUniformVectors = QuerySingleGLInt(functions, GL_MAX_VERTEX_UNIFORM_VECTORS);
}
else
{
// Doesn't limit ES version, GL_MAX_VERTEX_UNIFORM_COMPONENTS / 4 is acceptable.
caps->maxVertexUniformVectors = caps->maxVertexUniformComponents / 4;
}
if (functions->isAtLeastGL(gl::Version(3, 1)) || functions->hasGLExtension("GL_ARB_uniform_buffer_object") ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxVertexUniformBlocks = QuerySingleGLInt(functions, GL_MAX_VERTEX_UNIFORM_BLOCKS);
}
else
{
// Can't support ES3 without uniform blocks
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
if (functions->isAtLeastGL(gl::Version(3, 2)) ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxVertexOutputComponents = QuerySingleGLInt(functions, GL_MAX_VERTEX_OUTPUT_COMPONENTS);
}
else
{
// There doesn't seem, to be a desktop extension to add this cap, maybe it could be given a safe limit
// instead of limiting the supported ES version.
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
// Table 6.32, implementation dependent fragment shader limits
if (functions->isAtLeastGL(gl::Version(2, 0)) ||
functions->isAtLeastGLES(gl::Version(2, 0)))
{
caps->maxFragmentUniformComponents = QuerySingleGLInt(functions, GL_MAX_FRAGMENT_UNIFORM_COMPONENTS);
caps->maxTextureImageUnits = QuerySingleGLInt(functions, GL_MAX_TEXTURE_IMAGE_UNITS);
}
else
{
// Can't support ES2 version without these caps
LimitVersion(maxSupportedESVersion, gl::Version(0, 0));
}
if (functions->isAtLeastGL(gl::Version(4, 1)) || functions->hasGLExtension("GL_ARB_ES2_compatibility") ||
functions->isAtLeastGLES(gl::Version(2, 0)))
{
caps->maxFragmentUniformVectors = QuerySingleGLInt(functions, GL_MAX_FRAGMENT_UNIFORM_VECTORS);
}
else
{
// Doesn't limit ES version, GL_MAX_FRAGMENT_UNIFORM_COMPONENTS / 4 is acceptable.
caps->maxFragmentUniformVectors = caps->maxFragmentUniformComponents / 4;
}
if (functions->isAtLeastGL(gl::Version(3, 1)) || functions->hasGLExtension("GL_ARB_uniform_buffer_object") ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxFragmentUniformBlocks = QuerySingleGLInt(functions, GL_MAX_FRAGMENT_UNIFORM_BLOCKS);
}
else
{
// Can't support ES3 without uniform blocks
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
if (functions->isAtLeastGL(gl::Version(3, 2)) ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxFragmentInputComponents = QuerySingleGLInt(functions, GL_MAX_FRAGMENT_INPUT_COMPONENTS);
}
else
{
// There doesn't seem, to be a desktop extension to add this cap, maybe it could be given a safe limit
// instead of limiting the supported ES version.
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
if (functions->isAtLeastGL(gl::Version(3, 0)) ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->minProgramTexelOffset = QuerySingleGLInt(functions, GL_MIN_PROGRAM_TEXEL_OFFSET);
caps->maxProgramTexelOffset = QuerySingleGLInt(functions, GL_MAX_PROGRAM_TEXEL_OFFSET);
}
else
{
// Can't support ES3 without texel offset, could possibly be emulated in the shader
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
// Table 6.33, implementation dependent aggregate shader limits
if (functions->isAtLeastGL(gl::Version(3, 1)) || functions->hasGLExtension("GL_ARB_uniform_buffer_object") ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxUniformBufferBindings = QuerySingleGLInt(functions, GL_MAX_UNIFORM_BUFFER_BINDINGS);
caps->maxUniformBlockSize = QuerySingleGLInt64(functions, GL_MAX_UNIFORM_BLOCK_SIZE);
caps->uniformBufferOffsetAlignment = QuerySingleGLInt(functions, GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT);
caps->maxCombinedUniformBlocks = caps->maxVertexUniformBlocks + caps->maxFragmentInputComponents;
caps->maxCombinedVertexUniformComponents = QuerySingleGLInt64(functions, GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS);
caps->maxCombinedFragmentUniformComponents = QuerySingleGLInt64(functions, GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS);
}
else
{
// Can't support ES3 without uniform blocks
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
if (functions->isAtLeastGL(gl::Version(3, 0)) || functions->hasGLExtension("GL_ARB_ES3_compatibility") ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxVaryingComponents = QuerySingleGLInt(functions, GL_MAX_VARYING_COMPONENTS);
}
else if (functions->isAtLeastGL(gl::Version(2, 0)))
{
caps->maxVaryingComponents = QuerySingleGLInt(functions, GL_MAX_VARYING_FLOATS);
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
else
{
LimitVersion(maxSupportedESVersion, gl::Version(0, 0));
}
if (functions->isAtLeastGL(gl::Version(4, 1)) || functions->hasGLExtension("GL_ARB_ES2_compatibility") ||
functions->isAtLeastGLES(gl::Version(2, 0)))
{
caps->maxVaryingVectors = QuerySingleGLInt(functions, GL_MAX_VARYING_VECTORS);
}
else
{
// Doesn't limit ES version, GL_MAX_VARYING_COMPONENTS / 4 is acceptable.
caps->maxVaryingVectors = caps->maxVaryingComponents / 4;
}
// Determine the max combined texture image units by adding the vertex and fragment limits. If
// the real cap is queried, it would contain the limits for shader types that are not available to ES.
caps->maxCombinedTextureImageUnits = caps->maxVertexTextureImageUnits + caps->maxTextureImageUnits;
// Table 6.34, implementation dependent transform feedback limits
if (functions->isAtLeastGL(gl::Version(4, 0)) ||
functions->hasGLExtension("GL_ARB_transform_feedback2") ||
functions->isAtLeastGLES(gl::Version(3, 0)))
{
caps->maxTransformFeedbackInterleavedComponents = QuerySingleGLInt(functions, GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS);
caps->maxTransformFeedbackSeparateAttributes = QuerySingleGLInt(functions, GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS);
caps->maxTransformFeedbackSeparateComponents = QuerySingleGLInt(functions, GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS);
}
else
{
// Can't support ES3 without transform feedback
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
// Table 6.35, Framebuffer Dependent Values
if (functions->isAtLeastGL(gl::Version(3, 0)) || functions->hasGLExtension("GL_EXT_framebuffer_multisample") ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_EXT_multisampled_render_to_texture"))
{
caps->maxSamples = QuerySingleGLInt(functions, GL_MAX_SAMPLES);
}
else
{
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
// Check if sampler objects are supported
if (!functions->isAtLeastGL(gl::Version(3, 3)) &&
!functions->hasGLExtension("GL_ARB_sampler_objects") &&
!functions->isAtLeastGLES(gl::Version(3, 0)))
{
// Can't support ES3 without sampler objects
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
// Can't support ES3 without texture swizzling
if (!functions->isAtLeastGL(gl::Version(3, 3)) &&
!functions->hasGLExtension("GL_ARB_texture_swizzle") &&
!functions->hasGLExtension("GL_EXT_texture_swizzle") &&
!functions->isAtLeastGLES(gl::Version(3, 0)))
{
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
// Texture swizzling is required to work around the luminance texture format not being
// present in the core profile
if (functions->profile & GL_CONTEXT_CORE_PROFILE_BIT)
{
LimitVersion(maxSupportedESVersion, gl::Version(0, 0));
}
}
// Can't support ES3 without the GLSL packing builtins. We have a workaround for all
// desktop OpenGL versions starting from 3.3 with the bit packing extension.
if (!functions->isAtLeastGL(gl::Version(4, 2)) &&
!(functions->isAtLeastGL(gl::Version(3, 2)) &&
functions->hasGLExtension("GL_ARB_shader_bit_encoding")) &&
!functions->hasGLExtension("GL_ARB_shading_language_packing") &&
!functions->isAtLeastGLES(gl::Version(3, 0)))
{
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
// ES3 needs to support explicit layout location qualifiers, while it might be possible to
// fake them in our side, we currently don't support that.
if (!functions->isAtLeastGL(gl::Version(3, 3)) &&
!functions->hasGLExtension("GL_ARB_explicit_attrib_location") &&
!functions->isAtLeastGLES(gl::Version(3, 0)))
{
LimitVersion(maxSupportedESVersion, gl::Version(2, 0));
}
// TODO(geofflang): The gl-uniform-arrays WebGL conformance test struggles to complete on time
// if the max uniform vectors is too large. Artificially limit the maximum until the test is
// updated.
caps->maxVertexUniformVectors = std::min(1024u, caps->maxVertexUniformVectors);
caps->maxVertexUniformComponents =
std::min(caps->maxVertexUniformVectors / 4, caps->maxVertexUniformComponents);
caps->maxFragmentUniformVectors = std::min(1024u, caps->maxFragmentUniformVectors);
caps->maxFragmentUniformComponents =
std::min(caps->maxFragmentUniformVectors / 4, caps->maxFragmentUniformComponents);
// Extension support
extensions->setTextureExtensionSupport(*textureCapsMap);
extensions->elementIndexUint = functions->standard == STANDARD_GL_DESKTOP ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_OES_element_index_uint");
extensions->readFormatBGRA = functions->isAtLeastGL(gl::Version(1, 2)) || functions->hasGLExtension("GL_EXT_bgra") ||
functions->hasGLESExtension("GL_EXT_read_format_bgra");
extensions->mapBuffer = functions->isAtLeastGL(gl::Version(1, 5)) ||
functions->hasGLESExtension("GL_OES_mapbuffer");
extensions->mapBufferRange = functions->isAtLeastGL(gl::Version(3, 0)) || functions->hasGLExtension("GL_ARB_map_buffer_range") ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_EXT_map_buffer_range");
extensions->textureNPOT = functions->standard == STANDARD_GL_DESKTOP ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_OES_texture_npot");
extensions->drawBuffers = functions->isAtLeastGL(gl::Version(2, 0)) || functions->hasGLExtension("ARB_draw_buffers") ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_EXT_draw_buffers");
extensions->textureStorage = true;
extensions->textureFilterAnisotropic = functions->hasGLExtension("GL_EXT_texture_filter_anisotropic") || functions->hasGLESExtension("GL_EXT_texture_filter_anisotropic");
extensions->occlusionQueryBoolean =
functions->isAtLeastGL(gl::Version(1, 5)) ||
functions->hasGLExtension("GL_ARB_occlusion_query2") ||
functions->isAtLeastGLES(gl::Version(3, 0)) ||
functions->hasGLESExtension("GL_EXT_occlusion_query_boolean");
extensions->maxTextureAnisotropy = extensions->textureFilterAnisotropic ? QuerySingleGLFloat(functions, GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT) : 0.0f;
extensions->fence = functions->hasGLExtension("GL_NV_fence") || functions->hasGLESExtension("GL_NV_fence");
extensions->blendMinMax = functions->isAtLeastGL(gl::Version(1, 5)) || functions->hasGLExtension("GL_EXT_blend_minmax") ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_EXT_blend_minmax");
extensions->framebufferBlit = (functions->blitFramebuffer != nullptr);
extensions->framebufferMultisample = caps->maxSamples > 0;
extensions->standardDerivatives = functions->isAtLeastGL(gl::Version(2, 0)) || functions->hasGLExtension("GL_ARB_fragment_shader") ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_OES_standard_derivatives");
extensions->shaderTextureLOD = functions->isAtLeastGL(gl::Version(3, 0)) || functions->hasGLExtension("GL_ARB_shader_texture_lod") ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_EXT_shader_texture_lod");
extensions->fragDepth = functions->standard == STANDARD_GL_DESKTOP ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_EXT_frag_depth");
extensions->fboRenderMipmap = functions->isAtLeastGL(gl::Version(3, 0)) || functions->hasGLExtension("GL_EXT_framebuffer_object") ||
functions->isAtLeastGLES(gl::Version(3, 0)) || functions->hasGLESExtension("GL_OES_fbo_render_mipmap");
extensions->instancedArrays = functions->isAtLeastGL(gl::Version(3, 1)) ||
(functions->hasGLExtension("GL_ARB_instanced_arrays") &&
(functions->hasGLExtension("GL_ARB_draw_instanced") ||
functions->hasGLExtension("GL_EXT_draw_instanced"))) ||
functions->isAtLeastGLES(gl::Version(3, 0)) ||
functions->hasGLESExtension("GL_EXT_instanced_arrays");
extensions->unpackSubimage = functions->standard == STANDARD_GL_DESKTOP ||
functions->isAtLeastGLES(gl::Version(3, 0)) ||
functions->hasGLESExtension("GL_EXT_unpack_subimage");
extensions->packSubimage = functions->standard == STANDARD_GL_DESKTOP ||
functions->isAtLeastGLES(gl::Version(3, 0)) ||
functions->hasGLESExtension("GL_NV_pack_subimage");
extensions->debugMarker =
functions->isAtLeastGL(gl::Version(4, 3)) || functions->hasGLExtension("GL_KHR_debug") ||
functions->isAtLeastGLES(gl::Version(3, 2)) || functions->hasGLESExtension("GL_KHR_debug");
// ANGLE emulates vertex array objects in its GL layer
extensions->vertexArrayObject = true;
extensions->noError = true;
}
void GenerateCaps(IDirect3D9 *d3d9, IDirect3DDevice9 *device, D3DDEVTYPE deviceType, UINT adapter, gl::Caps *caps,
gl::TextureCapsMap *textureCapsMap, gl::Extensions *extensions)
{
D3DCAPS9 deviceCaps;
if (FAILED(d3d9->GetDeviceCaps(adapter, deviceType, &deviceCaps)))
{
// Can't continue with out device caps
return;
}
D3DDISPLAYMODE currentDisplayMode;
d3d9->GetAdapterDisplayMode(adapter, ¤tDisplayMode);
const gl::FormatSet &allFormats = gl::GetAllSizedInternalFormats();
for (gl::FormatSet::const_iterator internalFormat = allFormats.begin(); internalFormat != allFormats.end(); ++internalFormat)
{
gl::TextureCaps textureCaps = GenerateTextureFormatCaps(*internalFormat, d3d9, deviceType, adapter,
currentDisplayMode.Format);
textureCapsMap->insert(*internalFormat, textureCaps);
}
// GL core feature limits
caps->maxElementIndex = static_cast<GLint64>(std::numeric_limits<unsigned int>::max());
// 3D textures are unimplemented in D3D9
caps->max3DTextureSize = 1;
// Only one limit in GL, use the minimum dimension
caps->max2DTextureSize = std::min(deviceCaps.MaxTextureWidth, deviceCaps.MaxTextureHeight);
// D3D treats cube maps as a special case of 2D textures
caps->maxCubeMapTextureSize = caps->max2DTextureSize;
// Array textures are not available in D3D9
caps->maxArrayTextureLayers = 1;
// ES3-only feature
caps->maxLODBias = 0.0f;
// No specific limits on render target size, maximum 2D texture size is equivalent
caps->maxRenderbufferSize = caps->max2DTextureSize;
// Draw buffers are not supported in D3D9
caps->maxDrawBuffers = 1;
caps->maxColorAttachments = 1;
// No specific limits on viewport size, maximum 2D texture size is equivalent
caps->maxViewportWidth = caps->max2DTextureSize;
caps->maxViewportHeight = caps->maxViewportWidth;
// Point size is clamped to 1.0f when the shader model is less than 3
caps->minAliasedPointSize = 1.0f;
caps->maxAliasedPointSize = ((D3DSHADER_VERSION_MAJOR(deviceCaps.PixelShaderVersion) >= 3) ? deviceCaps.MaxPointSize : 1.0f);
// Wide lines not supported
caps->minAliasedLineWidth = 1.0f;
caps->maxAliasedLineWidth = 1.0f;
// GL extension support
extensions->setTextureExtensionSupport(*textureCapsMap);
extensions->elementIndexUint = deviceCaps.MaxVertexIndex >= (1 << 16);
extensions->packedDepthStencil = true;
extensions->getProgramBinary = true;
extensions->rgb8rgba8 = true;
extensions->readFormatBGRA = true;
extensions->pixelBufferObject = false;
extensions->mapBuffer = false;
extensions->mapBufferRange = false;
// ATI cards on XP have problems with non-power-of-two textures.
D3DADAPTER_IDENTIFIER9 adapterId = { 0 };
if (SUCCEEDED(d3d9->GetAdapterIdentifier(adapter, 0, &adapterId)))
{
extensions->textureNPOT = !(deviceCaps.TextureCaps & D3DPTEXTURECAPS_POW2) &&
!(deviceCaps.TextureCaps & D3DPTEXTURECAPS_CUBEMAP_POW2) &&
!(deviceCaps.TextureCaps & D3DPTEXTURECAPS_NONPOW2CONDITIONAL) &&
!(isWindowsVistaOrGreater() && adapterId.VendorId == VENDOR_ID_AMD);
}
else
{
extensions->textureNPOT = false;
}
extensions->drawBuffers = false;
extensions->textureStorage = true;
// Must support a minimum of 2:1 anisotropy for max anisotropy to be considered supported, per the spec
extensions->textureFilterAnisotropic = (deviceCaps.RasterCaps & D3DPRASTERCAPS_ANISOTROPY) != 0 && deviceCaps.MaxAnisotropy >= 2;
extensions->maxTextureAnisotropy = static_cast<GLfloat>(deviceCaps.MaxAnisotropy);
// Check occlusion query support by trying to create one
IDirect3DQuery9 *occlusionQuery = NULL;
extensions->occlusionQueryBoolean = SUCCEEDED(device->CreateQuery(D3DQUERYTYPE_OCCLUSION, &occlusionQuery)) && occlusionQuery;
SafeRelease(occlusionQuery);
// Check event query support by trying to create one
IDirect3DQuery9 *eventQuery = NULL;
extensions->fence = SUCCEEDED(device->CreateQuery(D3DQUERYTYPE_EVENT, &eventQuery)) && eventQuery;
SafeRelease(eventQuery);
extensions->timerQuery = false; // Unimplemented
extensions->robustness = true;
extensions->blendMinMax = true;
extensions->framebufferBlit = true;
extensions->framebufferMultisample = true;
extensions->instancedArrays = deviceCaps.PixelShaderVersion >= D3DPS_VERSION(3, 0);
extensions->packReverseRowOrder = true;
extensions->standardDerivatives = (deviceCaps.PS20Caps.Caps & D3DPS20CAPS_GRADIENTINSTRUCTIONS) != 0;
extensions->shaderTextureLOD = true;
extensions->fragDepth = true;
extensions->textureUsage = true;
extensions->translatedShaderSource = true;
extensions->colorBufferFloat = false;
}
void GenerateCaps(IDirect3D9 *d3d9,
IDirect3DDevice9 *device,
D3DDEVTYPE deviceType,
UINT adapter,
gl::Caps *caps,
gl::TextureCapsMap *textureCapsMap,
gl::Extensions *extensions,
gl::Limitations *limitations)
{
D3DCAPS9 deviceCaps;
if (FAILED(d3d9->GetDeviceCaps(adapter, deviceType, &deviceCaps)))
{
// Can't continue with out device caps
return;
}
D3DDISPLAYMODE currentDisplayMode;
d3d9->GetAdapterDisplayMode(adapter, ¤tDisplayMode);
GLuint maxSamples = 0;
for (GLenum internalFormat : gl::GetAllSizedInternalFormats())
{
gl::TextureCaps textureCaps = GenerateTextureFormatCaps(internalFormat, d3d9, deviceType,
adapter, currentDisplayMode.Format);
textureCapsMap->insert(internalFormat, textureCaps);
maxSamples = std::max(maxSamples, textureCaps.getMaxSamples());
if (gl::GetSizedInternalFormatInfo(internalFormat).compressed)
{
caps->compressedTextureFormats.push_back(internalFormat);
}
}
// GL core feature limits
caps->maxElementIndex = static_cast<GLint64>(std::numeric_limits<unsigned int>::max());
// 3D textures are unimplemented in D3D9
caps->max3DTextureSize = 1;
// Only one limit in GL, use the minimum dimension
caps->max2DTextureSize = std::min(deviceCaps.MaxTextureWidth, deviceCaps.MaxTextureHeight);
// D3D treats cube maps as a special case of 2D textures
caps->maxCubeMapTextureSize = caps->max2DTextureSize;
// Array textures are not available in D3D9
caps->maxArrayTextureLayers = 1;
// ES3-only feature
caps->maxLODBias = 0.0f;
// No specific limits on render target size, maximum 2D texture size is equivalent
caps->maxRenderbufferSize = caps->max2DTextureSize;
// Draw buffers are not supported in D3D9
caps->maxDrawBuffers = 1;
caps->maxColorAttachments = 1;
// No specific limits on viewport size, maximum 2D texture size is equivalent
caps->maxViewportWidth = caps->max2DTextureSize;
caps->maxViewportHeight = caps->maxViewportWidth;
// Point size is clamped to 1.0f when the shader model is less than 3
caps->minAliasedPointSize = 1.0f;
caps->maxAliasedPointSize =
((D3DSHADER_VERSION_MAJOR(deviceCaps.PixelShaderVersion) >= 3) ? deviceCaps.MaxPointSize
: 1.0f);
// Wide lines not supported
caps->minAliasedLineWidth = 1.0f;
caps->maxAliasedLineWidth = 1.0f;
// Primitive count limits (unused in ES2)
caps->maxElementsIndices = 0;
caps->maxElementsVertices = 0;
// Program and shader binary formats (no supported shader binary formats)
caps->programBinaryFormats.push_back(GL_PROGRAM_BINARY_ANGLE);
caps->vertexHighpFloat.setIEEEFloat();
caps->vertexMediumpFloat.setIEEEFloat();
caps->vertexLowpFloat.setIEEEFloat();
caps->fragmentHighpFloat.setIEEEFloat();
caps->fragmentMediumpFloat.setIEEEFloat();
caps->fragmentLowpFloat.setIEEEFloat();
// Some (most) hardware only supports single-precision floating-point numbers,
// which can accurately represent integers up to +/-16777216
caps->vertexHighpInt.setSimulatedInt(24);
caps->vertexMediumpInt.setSimulatedInt(24);
caps->vertexLowpInt.setSimulatedInt(24);
caps->fragmentHighpInt.setSimulatedInt(24);
caps->fragmentMediumpInt.setSimulatedInt(24);
caps->fragmentLowpInt.setSimulatedInt(24);
// WaitSync is ES3-only, set to zero
caps->maxServerWaitTimeout = 0;
// Vertex shader limits
caps->maxVertexAttributes = 16;
// Vertex Attrib Binding not supported.
caps->maxVertexAttribBindings = caps->maxVertexAttributes;
const size_t MAX_VERTEX_CONSTANT_VECTORS_D3D9 = 256;
caps->maxVertexUniformVectors =
MAX_VERTEX_CONSTANT_VECTORS_D3D9 - GetReservedVertexUniformVectors();
caps->maxShaderUniformComponents[gl::ShaderType::Vertex] = caps->maxVertexUniformVectors * 4;
caps->maxShaderUniformBlocks[gl::ShaderType::Vertex] = 0;
// SM3 only supports 12 output variables, but the special 12th register is only for PSIZE.
const unsigned int MAX_VERTEX_OUTPUT_VECTORS_SM3 = 12 - GetReservedVaryingVectors();
const unsigned int MAX_VERTEX_OUTPUT_VECTORS_SM2 = 10 - GetReservedVaryingVectors();
caps->maxVertexOutputComponents =
((deviceCaps.VertexShaderVersion >= D3DVS_VERSION(3, 0)) ? MAX_VERTEX_OUTPUT_VECTORS_SM3
: MAX_VERTEX_OUTPUT_VECTORS_SM2) *
4;
// Only Direct3D 10 ready devices support all the necessary vertex texture formats.
// We test this using D3D9 by checking support for the R16F format.
if (deviceCaps.VertexShaderVersion >= D3DVS_VERSION(3, 0) &&
SUCCEEDED(d3d9->CheckDeviceFormat(adapter, deviceType, currentDisplayMode.Format,
D3DUSAGE_QUERY_VERTEXTEXTURE, D3DRTYPE_TEXTURE,
D3DFMT_R16F)))
{
const size_t MAX_TEXTURE_IMAGE_UNITS_VTF_SM3 = 4;
caps->maxShaderTextureImageUnits[gl::ShaderType::Vertex] = MAX_TEXTURE_IMAGE_UNITS_VTF_SM3;
}
else
{
caps->maxShaderTextureImageUnits[gl::ShaderType::Vertex] = 0;
}
// Fragment shader limits
const size_t MAX_PIXEL_CONSTANT_VECTORS_SM3 = 224;
const size_t MAX_PIXEL_CONSTANT_VECTORS_SM2 = 32;
caps->maxFragmentUniformVectors =
((deviceCaps.PixelShaderVersion >= D3DPS_VERSION(3, 0)) ? MAX_PIXEL_CONSTANT_VECTORS_SM3
: MAX_PIXEL_CONSTANT_VECTORS_SM2) -
GetReservedFragmentUniformVectors();
caps->maxShaderUniformComponents[gl::ShaderType::Fragment] =
caps->maxFragmentUniformVectors * 4;
caps->maxShaderUniformBlocks[gl::ShaderType::Fragment] = 0;
caps->maxFragmentInputComponents = caps->maxVertexOutputComponents;
caps->maxShaderTextureImageUnits[gl::ShaderType::Fragment] = 16;
caps->minProgramTexelOffset = 0;
caps->maxProgramTexelOffset = 0;
// Aggregate shader limits (unused in ES2)
caps->maxUniformBufferBindings = 0;
caps->maxUniformBlockSize = 0;
caps->uniformBufferOffsetAlignment = 0;
caps->maxCombinedUniformBlocks = 0;
caps->maxCombinedShaderUniformComponents[gl::ShaderType::Vertex] = 0;
caps->maxCombinedShaderUniformComponents[gl::ShaderType::Fragment] = 0;
caps->maxVaryingComponents = 0;
// Aggregate shader limits
caps->maxVaryingVectors = caps->maxVertexOutputComponents / 4;
caps->maxCombinedTextureImageUnits = caps->maxShaderTextureImageUnits[gl::ShaderType::Vertex] +
caps->maxShaderTextureImageUnits[gl::ShaderType::Fragment];
// Transform feedback limits
caps->maxTransformFeedbackInterleavedComponents = 0;
caps->maxTransformFeedbackSeparateAttributes = 0;
caps->maxTransformFeedbackSeparateComponents = 0;
// Multisample limits
caps->maxSamples = maxSamples;
// GL extension support
extensions->setTextureExtensionSupport(*textureCapsMap);
extensions->elementIndexUint = deviceCaps.MaxVertexIndex >= (1 << 16);
extensions->getProgramBinary = true;
extensions->rgb8rgba8 = true;
extensions->readFormatBGRA = true;
extensions->pixelBufferObject = false;
extensions->mapBuffer = false;
extensions->mapBufferRange = false;
// textureRG is emulated and not performant.
extensions->textureRG = false;
D3DADAPTER_IDENTIFIER9 adapterId = {};
if (SUCCEEDED(d3d9->GetAdapterIdentifier(adapter, 0, &adapterId)))
{
// ATI cards on XP have problems with non-power-of-two textures.
extensions->textureNPOT = !(deviceCaps.TextureCaps & D3DPTEXTURECAPS_POW2) &&
!(deviceCaps.TextureCaps & D3DPTEXTURECAPS_CUBEMAP_POW2) &&
!(deviceCaps.TextureCaps & D3DPTEXTURECAPS_NONPOW2CONDITIONAL) &&
!(!isWindowsVistaOrGreater() && IsAMD(adapterId.VendorId));
// Disable depth texture support on AMD cards (See ANGLE issue 839)
if (IsAMD(adapterId.VendorId))
{
extensions->depthTextures = false;
}
}
else
{
extensions->textureNPOT = false;
}
extensions->drawBuffers = false;
extensions->textureStorage = true;
// Must support a minimum of 2:1 anisotropy for max anisotropy to be considered supported, per
// the spec
extensions->textureFilterAnisotropic =
(deviceCaps.RasterCaps & D3DPRASTERCAPS_ANISOTROPY) != 0 && deviceCaps.MaxAnisotropy >= 2;
extensions->maxTextureAnisotropy = static_cast<GLfloat>(deviceCaps.MaxAnisotropy);
// Check occlusion query support by trying to create one
IDirect3DQuery9 *occlusionQuery = nullptr;
extensions->occlusionQueryBoolean =
SUCCEEDED(device->CreateQuery(D3DQUERYTYPE_OCCLUSION, &occlusionQuery)) && occlusionQuery;
SafeRelease(occlusionQuery);
// Check event query support by trying to create one
IDirect3DQuery9 *eventQuery = nullptr;
extensions->fence =
SUCCEEDED(device->CreateQuery(D3DQUERYTYPE_EVENT, &eventQuery)) && eventQuery;
SafeRelease(eventQuery);
extensions->disjointTimerQuery = false;
extensions->robustness = true;
// It seems that only DirectX 10 and higher enforce the well-defined behavior of always
// returning zero values when out-of-bounds reads. See
// https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_robustness.txt
extensions->robustBufferAccessBehavior = false;
extensions->blendMinMax = true;
extensions->framebufferBlit = true;
extensions->framebufferMultisample = true;
extensions->instancedArrays = deviceCaps.PixelShaderVersion >= D3DPS_VERSION(3, 0);
extensions->packReverseRowOrder = true;
extensions->standardDerivatives =
(deviceCaps.PS20Caps.Caps & D3DPS20CAPS_GRADIENTINSTRUCTIONS) != 0;
extensions->shaderTextureLOD = true;
extensions->fragDepth = true;
extensions->textureUsage = true;
extensions->translatedShaderSource = true;
extensions->fboRenderMipmap = false;
extensions->discardFramebuffer = false; // It would be valid to set this to true, since
// glDiscardFramebufferEXT is just a hint
extensions->colorBufferFloat = false;
extensions->debugMarker = true;
extensions->eglImage = true;
extensions->eglImageExternal = true;
extensions->unpackSubimage = true;
extensions->packSubimage = true;
extensions->syncQuery = extensions->fence;
extensions->copyTexture = true;
extensions->textureBorderClamp = true;
// D3D9 has no concept of separate masks and refs for front and back faces in the depth stencil
// state.
limitations->noSeparateStencilRefsAndMasks = true;
// D3D9 shader models have limited support for looping, so the Appendix A
// index/loop limitations are necessary. Workarounds that are needed to
// support dynamic indexing of vectors on HLSL also don't work on D3D9.
limitations->shadersRequireIndexedLoopValidation = true;
// D3D9 cannot support constant color and alpha blend funcs together
limitations->noSimultaneousConstantColorAndAlphaBlendFunc = true;
// D3D9 cannot support packing more than one variable to a single varying.
// TODO(jmadill): Implement more sophisticated component packing in D3D9.
limitations->noFlexibleVaryingPacking = true;
}
