| #include "precompiled.h" |
| // |
| // Copyright (c) 2014 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| |
| // queryconversions.cpp: Implementation of state query cast conversions |
| |
| #include "libGLESv2/Context.h" |
| #include "common/utilities.h" |
| |
| namespace gl |
| { |
| |
| // Helper class for converting a GL type to a GLenum: |
| // We can't use CastStateValueEnum generally, because of GLboolean + GLubyte overlap. |
| // We restrict our use to CastStateValue, where it eliminates duplicate parameters. |
| |
| template <typename GLType> |
| struct CastStateValueEnum { static GLenum mEnumForType; }; |
| |
| template <> GLenum CastStateValueEnum<GLint>::mEnumForType = GL_INT; |
| template <> GLenum CastStateValueEnum<GLuint>::mEnumForType = GL_UNSIGNED_INT; |
| template <> GLenum CastStateValueEnum<GLboolean>::mEnumForType = GL_BOOL; |
| template <> GLenum CastStateValueEnum<GLint64>::mEnumForType = GL_INT_64_ANGLEX; |
| template <> GLenum CastStateValueEnum<GLfloat>::mEnumForType = GL_FLOAT; |
| |
| template <typename QueryT, typename NativeT> |
| QueryT CastStateValueToInt(GLenum pname, NativeT value) |
| { |
| GLenum queryType = CastStateValueEnum<QueryT>::mEnumForType; |
| GLenum nativeType = CastStateValueEnum<NativeT>::mEnumForType; |
| |
| if (nativeType == GL_FLOAT) |
| { |
| // RGBA color values and DepthRangeF values are converted to integer using Equation 2.4 from Table 4.5 |
| if (pname == GL_DEPTH_RANGE || pname == GL_COLOR_CLEAR_VALUE || pname == GL_DEPTH_CLEAR_VALUE || pname == GL_BLEND_COLOR) |
| { |
| return static_cast<QueryT>((static_cast<GLfloat>(0xFFFFFFFF) * value - 1.0f) / 2.0f); |
| } |
| else |
| { |
| return gl::iround<QueryT>(value); |
| } |
| } |
| |
| // Clamp 64-bit int values when casting to int |
| if (nativeType == GL_INT_64_ANGLEX && queryType == GL_INT) |
| { |
| GLint64 minIntValue = static_cast<GLint64>(std::numeric_limits<GLint>::min()); |
| GLint64 maxIntValue = static_cast<GLint64>(std::numeric_limits<GLint>::max()); |
| GLint64 clampedValue = std::max(std::min(static_cast<GLint64>(value), maxIntValue), minIntValue); |
| return static_cast<QueryT>(clampedValue); |
| } |
| |
| return static_cast<QueryT>(value); |
| } |
| |
| template <typename QueryT, typename NativeT> |
| QueryT CastStateValue(GLenum pname, NativeT value) |
| { |
| GLenum queryType = CastStateValueEnum<QueryT>::mEnumForType; |
| |
| switch (queryType) |
| { |
| case GL_INT: return CastStateValueToInt<QueryT, NativeT>(pname, value); |
| case GL_INT_64_ANGLEX: return CastStateValueToInt<QueryT, NativeT>(pname, value); |
| case GL_FLOAT: return static_cast<QueryT>(value); |
| case GL_BOOL: return (value == static_cast<NativeT>(0) ? GL_FALSE : GL_TRUE); |
| default: UNREACHABLE(); return 0; |
| } |
| } |
| |
| template <typename QueryT> |
| void CastStateValues(Context *context, GLenum nativeType, GLenum pname, |
| unsigned int numParams, QueryT *outParams) |
| { |
| if (nativeType == GL_INT) |
| { |
| GLint *intParams = NULL; |
| intParams = new GLint[numParams]; |
| |
| context->getIntegerv(pname, intParams); |
| |
| for (unsigned int i = 0; i < numParams; ++i) |
| { |
| outParams[i] = CastStateValue<QueryT>(pname, intParams[i]); |
| } |
| |
| delete [] intParams; |
| } |
| else if (nativeType == GL_BOOL) |
| { |
| GLboolean *boolParams = NULL; |
| boolParams = new GLboolean[numParams]; |
| |
| context->getBooleanv(pname, boolParams); |
| |
| for (unsigned int i = 0; i < numParams; ++i) |
| { |
| outParams[i] = (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1)); |
| } |
| |
| delete [] boolParams; |
| } |
| else if (nativeType == GL_FLOAT) |
| { |
| GLfloat *floatParams = NULL; |
| floatParams = new GLfloat[numParams]; |
| |
| context->getFloatv(pname, floatParams); |
| |
| for (unsigned int i = 0; i < numParams; ++i) |
| { |
| outParams[i] = CastStateValue<QueryT>(pname, floatParams[i]); |
| } |
| |
| delete [] floatParams; |
| } |
| else if (nativeType == GL_INT_64_ANGLEX) |
| { |
| GLint64 *int64Params = NULL; |
| int64Params = new GLint64[numParams]; |
| |
| context->getInteger64v(pname, int64Params); |
| |
| for (unsigned int i = 0; i < numParams; ++i) |
| { |
| outParams[i] = CastStateValue<QueryT>(pname, int64Params[i]); |
| } |
| |
| delete [] int64Params; |
| } |
| else UNREACHABLE(); |
| } |
| |
| // Explicit template instantiation (how we export template functions in different files) |
| // The calls below will make CastStateValues successfully link with the GL state query types |
| // The GL state query API types are: bool, int, uint, float, int64 |
| |
| template void CastStateValues<GLboolean>(Context *, GLenum, GLenum, unsigned int, GLboolean *); |
| template void CastStateValues<GLint>(Context *, GLenum, GLenum, unsigned int, GLint *); |
| template void CastStateValues<GLuint>(Context *, GLenum, GLenum, unsigned int, GLuint *); |
| template void CastStateValues<GLfloat>(Context *, GLenum, GLenum, unsigned int, GLfloat *); |
| template void CastStateValues<GLint64>(Context *, GLenum, GLenum, unsigned int, GLint64 *); |
| |
| } |