skia/config/SkUserConfig.h

   1 /*
   2  * Copyright (C) 2006 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef SkUserConfig_DEFINED
  18 #define SkUserConfig_DEFINED
  19
  20 /*  SkTypes.h, the root of the public header files, does the following trick:
  21
  22     #include <SkPreConfig.h>
  23     #include <SkUserConfig.h>
  24     #include <SkPostConfig.h>
  25
  26     SkPreConfig.h runs first, and it is responsible for initializing certain
  27     skia defines.
  28
  29     SkPostConfig.h runs last, and its job is to just check that the final
  30     defines are consistent (i.e. that we don't have mutually conflicting
  31     defines).
  32
  33     SkUserConfig.h (this file) runs in the middle. It gets to change or augment
  34     the list of flags initially set in preconfig, and then postconfig checks
  35     that everything still makes sense.
  36
  37     Below are optional defines that add, subtract, or change default behavior
  38     in Skia. Your port can locally edit this file to enable/disable flags as
  39     you choose, or these can be delared on your command line (i.e. -Dfoo).
  40
  41     By default, this include file will always default to having all of the flags
  42     commented out, so including it will have no effect.
  43 */
  44
  45 ///////////////////////////////////////////////////////////////////////////////
  46
  47 /*  Skia has lots of debug-only code. Often this is just null checks or other
  48     parameter checking, but sometimes it can be quite intrusive (e.g. check that
  49     each 32bit pixel is in premultiplied form). This code can be very useful
  50     during development, but will slow things down in a shipping product.
  51
  52     By default, these mutually exclusive flags are defined in SkPreConfig.h,
  53     based on the presence or absence of NDEBUG, but that decision can be changed
  54     here.
  55  */
  56 //#define SK_DEBUG
  57 //#define SK_RELEASE
  58
  59 #ifdef DCHECK_ALWAYS_ON
  60     #undef SK_RELEASE
  61     #define SK_DEBUG
  62 #endif
  63
  64 /*  If, in debugging mode, Skia needs to stop (presumably to invoke a debugger)
  65     it will call SK_CRASH(). If this is not defined it, it is defined in
  66     SkPostConfig.h to write to an illegal address
  67  */
  68 //#define SK_CRASH() *(int *)(uintptr_t)0 = 0
  69
  70
  71 /*  preconfig will have attempted to determine the endianness of the system,
  72     but you can change these mutually exclusive flags here.
  73  */
  74 //#define SK_CPU_BENDIAN
  75 //#define SK_CPU_LENDIAN
  76
  77 /*  If zlib is available and you want to support the flate compression
  78     algorithm (used in PDF generation), define SK_ZLIB_INCLUDE to be the
  79     include path.
  80  */
  81 //#define SK_ZLIB_INCLUDE <zlib.h>
  82 #define SK_ZLIB_INCLUDE "third_party/zlib/zlib.h"
  83
  84 /*  Define this to allow PDF scalars above 32k.  The PDF/A spec doesn't allow
  85     them, but modern PDF interpreters should handle them just fine.
  86  */
  87 //#define SK_ALLOW_LARGE_PDF_SCALARS
  88
  89 /*  Define this to provide font subsetter for font subsetting when generating
  90     PDF documents.
  91  */
  92 #define SK_SFNTLY_SUBSETTER \
  93     "third_party/sfntly/cpp/src/sample/chromium/font_subsetter.h"
  94
  95 /*  To write debug messages to a console, skia will call SkDebugf(...) following
  96     printf conventions (e.g. const char* format, ...). If you want to redirect
  97     this to something other than printf, define yours here
  98  */
  99 //#define SkDebugf(...)  MyFunction(__VA_ARGS__)
 100
 101
 102 /*  If SK_DEBUG is defined, then you can optionally define SK_SUPPORT_UNITTEST
 103     which will run additional self-tests at startup. These can take a long time,
 104     so this flag is optional.
 105  */
 106 #ifdef SK_DEBUG
 107 #define SK_SUPPORT_UNITTEST
 108 #endif
 109
 110 /* If cross process SkPictureImageFilters are not explicitly enabled then
 111    they are always disabled.
 112  */
 113 #ifndef SK_ALLOW_CROSSPROCESS_PICTUREIMAGEFILTERS
 114     #ifndef SK_DISALLOW_CROSSPROCESS_PICTUREIMAGEFILTERS
 115         #define SK_DISALLOW_CROSSPROCESS_PICTUREIMAGEFILTERS
 116     #endif
 117 #endif
 118
 119
 120 /* If your system embeds skia and has complex event logging, define this
 121    symbol to name a file that maps the following macros to your system's
 122    equivalents:
 123        SK_TRACE_EVENT0(event)
 124        SK_TRACE_EVENT1(event, name1, value1)
 125        SK_TRACE_EVENT2(event, name1, value1, name2, value2)
 126    src/utils/SkDebugTrace.h has a trivial implementation that writes to
 127    the debug output stream. If SK_USER_TRACE_INCLUDE_FILE is not defined,
 128    SkTrace.h will define the above three macros to do nothing.
 129 */
 130 #undef SK_USER_TRACE_INCLUDE_FILE
 131
 132 // ===== Begin Chrome-specific definitions =====
 133
 134 #ifdef SK_DEBUG
 135 #define SK_REF_CNT_MIXIN_INCLUDE "sk_ref_cnt_ext_debug.h"
 136 #else
 137 #define SK_REF_CNT_MIXIN_INCLUDE "sk_ref_cnt_ext_release.h"
 138 #endif
 139
 140 #define SK_SCALAR_IS_FLOAT
 141 #undef SK_SCALAR_IS_FIXED
 142
 143 #define SK_MSCALAR_IS_FLOAT
 144 #undef SK_MSCALAR_IS_DOUBLE
 145
 146 #define GR_MAX_OFFSCREEN_AA_DIM     512
 147
 148 // Log the file and line number for assertions.
 149 #define SkDebugf(...) SkDebugf_FileLine(__FILE__, __LINE__, false, __VA_ARGS__)
 150 SK_API void SkDebugf_FileLine(const char* file, int line, bool fatal,
 151                               const char* format, ...);
 152
 153 // Marking the debug print as "fatal" will cause a debug break, so we don't need
 154 // a separate crash call here.
 155 #define SK_DEBUGBREAK(cond) do { if (!(cond)) { \
 156     SkDebugf_FileLine(__FILE__, __LINE__, true, \
 157     "%s:%d: failed assertion \"%s\"\n", \
 158     __FILE__, __LINE__, #cond); } } while (false)
 159
 160 #if !defined(ANDROID)   // On Android, we use the skia default settings.
 161 #define SK_A32_SHIFT    24
 162 #define SK_R32_SHIFT    16
 163 #define SK_G32_SHIFT    8
 164 #define SK_B32_SHIFT    0
 165 #endif
 166
 167 #if defined(SK_BUILD_FOR_WIN32)
 168
 169 #define SK_BUILD_FOR_WIN
 170
 171 // Skia uses this deprecated bzero function to fill zeros into a string.
 172 #define bzero(str, len) memset(str, 0, len)
 173
 174 #elif defined(SK_BUILD_FOR_MAC)
 175
 176 #define SK_CPU_LENDIAN
 177 #undef  SK_CPU_BENDIAN
 178
 179 #elif defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_ANDROID)
 180
 181 // Prefer FreeType's emboldening algorithm to Skia's
 182 // TODO: skia used to just use hairline, but has improved since then, so
 183 // we should revisit this choice...
 184 #define SK_USE_FREETYPE_EMBOLDEN
 185
 186 #if defined(SK_BUILD_FOR_UNIX) && defined(SK_CPU_BENDIAN)
 187 // Above we set the order for ARGB channels in registers. I suspect that, on
 188 // big endian machines, you can keep this the same and everything will work.
 189 // The in-memory order will be different, of course, but as long as everything
 190 // is reading memory as words rather than bytes, it will all work. However, if
 191 // you find that colours are messed up I thought that I would leave a helpful
 192 // locator for you. Also see the comments in
 193 // base/gfx/bitmap_platform_device_linux.h
 194 #error Read the comment at this location
 195 #endif
 196
 197 #endif
 198
 199 // The default crash macro writes to badbeef which can cause some strange
 200 // problems. Instead, pipe this through to the logging function as a fatal
 201 // assertion.
 202 #define SK_CRASH() SkDebugf_FileLine(__FILE__, __LINE__, true, "SK_CRASH")
 203
 204 // These flags are no longer defined in Skia, but we have them (temporarily)
 205 // until we update our call-sites (typically these are for API changes).
 206 //
 207 // Remove these as we update our sites.
 208 //
 209 #ifndef    SK_SUPPORT_LEGACY_GETTOPDEVICE
 210 #   define SK_SUPPORT_LEGACY_GETTOPDEVICE
 211 #endif
 212
 213 #ifndef    SK_SUPPORT_LEGACY_GETDEVICE
 214 #   define SK_SUPPORT_LEGACY_GETDEVICE
 215 #endif
 216
 217 #ifndef    SK_IGNORE_ETC1_SUPPORT
 218 #   define SK_IGNORE_ETC1_SUPPORT
 219 #endif
 220
 221 #ifndef    SK_IGNORE_GPU_DITHER
 222 #   define SK_IGNORE_GPU_DITHER
 223 #endif
 224
 225 ///////////////////////// Imported from BUILD.gn and skia_common.gypi
 226
 227 /* In some places Skia can use static initializers for global initialization,
 228  *  or fall back to lazy runtime initialization. Chrome always wants the latter.
 229  */
 230 #define SK_ALLOW_STATIC_GLOBAL_INITIALIZERS 0
 231
 232 /* Forcing the unoptimized path for the offset image filter in skia until
 233  * all filters used in Blink support the optimized path properly
 234  */
 235 #define SK_DISABLE_OFFSETIMAGEFILTER_OPTIMIZATION
 236
 237 /* This flag forces Skia not to use typographic metrics with GDI.
 238  */
 239 #define SK_GDI_ALWAYS_USE_TEXTMETRICS_FOR_FONT_METRICS
 240
 241 #define SK_IGNORE_BLURRED_RRECT_OPT
 242 #define SK_USE_DISCARDABLE_SCALEDIMAGECACHE
 243 #define SK_WILL_NEVER_DRAW_PERSPECTIVE_TEXT
 244
 245 #define SK_ATTR_DEPRECATED          SK_NOTHING_ARG1
 246 #define SK_ENABLE_INST_COUNT        0
 247 #define GR_GL_CUSTOM_SETUP_HEADER   "GrGLConfig_chrome.h"
 248
 249 // ===== End Chrome-specific definitions =====
 250
 251 #endif