1c13c9668a
rietveld issue 4188049 git-svn-id: http://skia.googlecode.com/svn/trunk@786 2bbb7eff-a529-9590-31e7-b0007b416f81
386 lines
11 KiB
C++
386 lines
11 KiB
C++
/*
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Copyright 2010 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef GrConfig_DEFINED
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#define GrConfig_DEFINED
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///////////////////////////////////////////////////////////////////////////////
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// preconfig section:
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//
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// All the work before including GrUserConfig.h should center around guessing
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// what platform we're on, and defining low-level symbols based on that.
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//
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// A build environment may have already defined symbols, so we first check
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// for that
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//
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// hack to ensure we know what sort of Apple platform we're on
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#if defined(__APPLE_CPP__) || defined(__APPLE_CC__)
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#include <TargetConditionals.h>
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#endif
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/**
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* Gr defines are set to 0 or 1, rather than being undefined or defined
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*/
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#if !defined(GR_ANDROID_BUILD)
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#define GR_ANDROID_BUILD 0
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#endif
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#if !defined(GR_IOS_BUILD)
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#define GR_IOS_BUILD 0
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#endif
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#if !defined(GR_LINUX_BUILD)
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#define GR_LINUX_BUILD 0
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#endif
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#if !defined(GR_MAC_BUILD)
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#define GR_MAC_BUILD 0
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#endif
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#if !defined(GR_WIN32_BUILD)
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#define GR_WIN32_BUILD 0
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#endif
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#if !defined(GR_QNX_BUILD)
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#define GR_QNX_BUILD 0
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#endif
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/**
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* If no build target has been defined, attempt to infer.
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*/
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#if !GR_ANDROID_BUILD && !GR_IOS_BUILD && !GR_LINUX_BUILD && !GR_MAC_BUILD && !GR_WIN32_BUILD && !GR_QNX_BUILD
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#if defined(_WIN32)
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#undef GR_WIN32_BUILD
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#define GR_WIN32_BUILD 1
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// #error "WIN"
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#elif TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
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#undef GR_IOS_BUILD
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#define GR_IOS_BUILD 1
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// #error "IOS"
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#elif (defined(ANDROID_NDK) && ANDROID_NDK) || defined(ANDROID)
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#undef GR_ANDROID_BUILD
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#define GR_ANDROID_BUILD 1
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// #error "ANDROID"
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#elif TARGET_OS_MAC
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#undef GR_MAC_BUILD
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#define GR_MAC_BUILD 1
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// #error "MAC"
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#elif TARGET_OS_QNX || defined(__QNXNTO__)
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#undef GR_QNX_BUILD
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#define GR_QNX_BUILD 1
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// #error "QNX"
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#else
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#undef GR_LINUX_BUILD
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#define GR_LINUX_BUILD 1
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// #error "LINUX"
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#endif
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#endif
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// we need both GR_DEBUG and GR_RELEASE to be defined as 0 or 1
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//
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#ifndef GR_DEBUG
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#ifdef GR_RELEASE
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#define GR_DEBUG !GR_RELEASE
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#else
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#ifdef NDEBUG
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#define GR_DEBUG 0
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#else
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#define GR_DEBUG 1
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#endif
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#endif
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#endif
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#ifndef GR_RELEASE
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#define GR_RELEASE !GR_DEBUG
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#endif
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#if GR_DEBUG == GR_RELEASE
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#error "GR_DEBUG and GR_RELEASE must not be the same"
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#endif
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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/*
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* Pull stdint.h in before user-config, to be sure our __STDC... macros are
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* defined before anyone else might try to include stdint.h
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*/
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#define __STDC_LIMIT_MACROS
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#define __STDC_CONSTANT_MACROS
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#include <stdint.h>
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/*
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* The "user config" file can be empty, and everything should work. It is
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* meant to store a given platform/client's overrides of our guess-work.
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*
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* A alternate user config file can be specified by defining
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* GR_USER_CONFIG_FILE. It should be defined relative to GrConfig.h
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*
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* e.g. it can specify GR_DEBUG/GR_RELEASE as it please, change the BUILD
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* target, or supply its own defines for anything else (e.g. GR_SCALAR)
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*/
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#if !defined(GR_USER_CONFIG_FILE)
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#include "GrUserConfig.h"
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#else
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#include GR_USER_CONFIG_FILE
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#endif
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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// postconfig section:
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//
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// By now we must have a GR_..._BUILD symbol set to 1, and a decision about
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// debug -vs- release
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//
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extern void GrPrintf(const char format[], ...);
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/**
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* GR_STRING makes a string of X where X is expanded before conversion to a string
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* if X itself contains macros.
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*/
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#define GR_STRING(X) GR_STRING_IMPL(X)
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#define GR_STRING_IMPL(X) #X
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/**
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* GR_CONCAT concatenates X and Y where each is expanded before
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* contanenation if either contains macros.
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*/
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#define GR_CONCAT(X,Y) GR_CONCAT_IMPL(X,Y)
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#define GR_CONCAT_IMPL(X,Y) X##Y
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/**
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* Creates a string of the form "<filename>(<linenumber>) : "
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*/
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#define GR_FILE_AND_LINE_STR __FILE__ "(" GR_STRING(__LINE__) ") : "
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/**
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* Compilers have different ways of issuing warnings. This macro
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* attempts to abstract them, but may need to be specialized for your
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* particular compiler.
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* To insert compiler warnings use "#pragma message GR_WARN(<string>)"
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*/
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#if defined(_MSC_VER) && _MSC_VER
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#define GR_WARN(MSG) (GR_FILE_AND_LINE_STR "WARNING: " MSG)
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#else//__GNUC__ - may need other defines for different compilers
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#define GR_WARN(MSG) ("WARNING: " MSG)
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#endif
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/**
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* GR_ALWAYSBREAK is an unconditional break in all builds.
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*/
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#if !defined(GR_ALWAYSBREAK)
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#if GR_WIN32_BUILD
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#define GR_ALWAYSBREAK __debugbreak()
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#else
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// TODO: do other platforms really not have continuable breakpoints?
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// sign extend for 64bit architectures to be sure this is
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// in the high address range
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#define GR_ALWAYSBREAK *((int*)(int64_t)(int32_t)0xbeefcafe) = 0;
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#endif
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#endif
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/**
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* GR_DEBUGBREAK is an unconditional break in debug builds.
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*/
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#if !defined(GR_DEBUGBREAK)
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#if GR_DEBUG
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#define GR_DEBUGBREAK GR_ALWAYSBREAK
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#else
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#define GR_DEBUGBREAK
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#endif
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#endif
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/**
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* GR_ALWAYSASSERT is an assertion in all builds.
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*/
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#if !defined(GR_ALWAYSASSERT)
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#define GR_ALWAYSASSERT(COND) \
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do { \
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if (!(COND)) { \
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GrPrintf("%s %s failed\n", GR_FILE_AND_LINE_STR, #COND); \
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GR_ALWAYSBREAK; \
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} \
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} while (false)
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#endif
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/**
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* GR_DEBUGASSERT is an assertion in debug builds only.
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*/
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#if !defined(GR_DEBUGASSERT)
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#if GR_DEBUG
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#define GR_DEBUGASSERT(COND) GR_ALWAYSASSERT(COND)
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#else
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#define GR_DEBUGASSERT(COND)
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#endif
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#endif
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/**
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* Prettier forms of the above macros.
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*/
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#define GrAssert(COND) GR_DEBUGASSERT(COND)
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#define GrAlwaysAssert(COND) GR_ALWAYSASSERT(COND)
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/**
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* Crash from unrecoverable condition, optionally with a message.
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*/
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inline void GrCrash() { GrAlwaysAssert(false); }
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inline void GrCrash(const char* msg) { GrPrintf(msg); GrAlwaysAssert(false); }
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/**
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* GR_DEBUGCODE compiles the code X in debug builds only
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*/
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#if !defined(GR_DEBUGCODE)
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#if GR_DEBUG
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#define GR_DEBUGCODE(X) X
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#else
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#define GR_DEBUGCODE(X)
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#endif
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#endif
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/**
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* GR_STATIC_ASSERT is a compile time assertion. Depending on the platform
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* it may print the message in the compiler log. Obviously, the condition must
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* be evaluatable at compile time.
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*/
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// VS 2010 and GCC compiled with c++0x or gnu++0x support the new
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// static_assert.
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#if !defined(GR_STATIC_ASSERT)
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#if (defined(_MSC_VER) && _MSC_VER >= 1600) || (defined(__GXX_EXPERIMENTAL_CXX0X__) && __GXX_EXPERIMENTAL_CXX0X__)
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#define GR_STATIC_ASSERT(CONDITION) static_assert(CONDITION, "bug")
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#else
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template <bool> class GR_STATIC_ASSERT_FAILURE;
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template <> class GR_STATIC_ASSERT_FAILURE<true> {};
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#define GR_STATIC_ASSERT(CONDITION) \
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enum {GR_CONCAT(X,__LINE__) = \
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sizeof(GR_STATIC_ASSERT_FAILURE<CONDITION>)}
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#endif
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#endif
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#if !defined(GR_SCALAR_IS_FLOAT)
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#define GR_SCALAR_IS_FLOAT 0
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#endif
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#if !defined(GR_SCALAR_IS_FIXED)
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#define GR_SCALAR_IS_FIXED 0
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#endif
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#if !defined(GR_TEXT_SCALAR_TYPE_IS_USHORT)
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#define GR_TEXT_SCALAR_TYPE_IS_USHORT 0
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#endif
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#if !defined(GR_TEXT_SCALAR_TYPE_IS_FLOAT)
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#define GR_TEXT_SCALAR_TYPE_IS_FLOAT 0
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#endif
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#if !defined(GR_TEXT_SCALAR_TYPE_IS_FIXED)
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#define GR_TEXT_SCALAR_TYPE_IS_FIXED 0
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#endif
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#ifndef GR_DUMP_TEXTURE_UPLOAD
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#define GR_DUMP_TEXTURE_UPLOAD 0
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#endif
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/**
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* GR_COLLECT_STATS controls whether the GrGpu class collects stats.
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* If not already defined then collect in debug build but not release.
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*/
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#if !defined(GR_COLLECT_STATS)
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#define GR_COLLECT_STATS GR_DEBUG
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#endif
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/**
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* GR_STATIC_RECT_VB controls whether rects are drawn by issuing a vertex
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* for each corner or using a static vb that is positioned by modifying the
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* view / texture matrix.
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*/
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#if !defined(GR_STATIC_RECT_VB)
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#define GR_STATIC_RECT_VB 0
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#endif
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/**
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* GR_AGGRESSIVE_SHADER_OPTS controls how aggressively shaders are optimized
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* for special cases. On systems where program changes are expensive this
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* may not be advantageous. Consecutive draws may no longer use the same
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* program.
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*/
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#if !defined(GR_AGGRESSIVE_SHADER_OPTS)
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#define GR_AGGRESSIVE_SHADER_OPTS 0
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#endif
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/**
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* GR_GEOM_BUFFER_LOCK_THRESHOLD gives a threshold (in bytes) for when Gr should
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* lock a GrGeometryBuffer to update its contents. It will use Lock() if the
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* size of the udpated region is greater than the threshold. Otherwise it will
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* use updateData() or updateSubData().
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*/
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#if !defined(GR_GEOM_BUFFER_LOCK_THRESHOLD)
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#define GR_GEOM_BUFFER_LOCK_THRESHOLD (1 << 15)
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#endif
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///////////////////////////////////////////////////////////////////////////////
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// tail section:
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//
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// Now we just assert if we are missing some required define, or if we detect
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// and inconsistent combination of defines
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//
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/**
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* Only one build target macro should be 1 and the rest should be 0.
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*/
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#define GR_BUILD_SUM (GR_WIN32_BUILD + GR_MAC_BUILD + GR_IOS_BUILD + GR_ANDROID_BUILD + GR_LINUX_BUILD + GR_QNX_BUILD)
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#if 0 == GR_BUILD_SUM
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#error "Missing a GR_BUILD define"
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#elif 1 != GR_BUILD_SUM
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#error "More than one GR_BUILD defined"
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#endif
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#if !GR_SCALAR_IS_FLOAT && !GR_SCALAR_IS_FIXED
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#undef GR_SCALAR_IS_FLOAT
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#define GR_SCALAR_IS_FLOAT 1
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#pragma message GR_WARN("Scalar type not defined, defaulting to float")
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#endif
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#if !GR_TEXT_SCALAR_IS_FLOAT && \
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!GR_TEXT_SCALAR_IS_FIXED && \
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!GR_TEXT_SCALAR_IS_USHORT
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#undef GR_TEXT_SCALAR_IS_FLOAT
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#define GR_TEXT_SCALAR_IS_FLOAT 1
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#pragma message GR_WARN("Text scalar type not defined, defaulting to float")
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#endif
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#if 0
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#if GR_WIN32_BUILD
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// #pragma message GR_WARN("GR_WIN32_BUILD")
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#endif
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#if GR_MAC_BUILD
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// #pragma message GR_WARN("GR_MAC_BUILD")
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#endif
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#if GR_IOS_BUILD
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// #pragma message GR_WARN("GR_IOS_BUILD")
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#endif
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#if GR_ANDROID_BUILD
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// #pragma message GR_WARN("GR_ANDROID_BUILD")
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#endif
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#if GR_LINUX_BUILD
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// #pragma message GR_WARN("GR_LINUX_BUILD")
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#endif
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#if GR_QNX_BUILD
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// #pragma message GR_WARN("GR_QNX_BUILD")
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#endif
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#endif
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#endif
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