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/*
Settings for the Skia library. We compile the Skia library with these
settings and also LO code uses this header to ensure the settings
are the same.
*/
#ifndef CONFIG_SKIA_H
#define CONFIG_SKIA_H
// This is a setting that should be set manually and it affects LO
// code rather than Skia itself. It basically controls setting
// BackendCapabilities::mbSupportsBitmap32, i.e. whether one LO bitmap
// contains all the 32bits of an image including the alpha (premultiplied).
//
// Since Skia does not natively support 24bpp, the preferred setup is
// that the setting should be enabled, it makes the code faster and cleaner.
//
// Unfortunately VCL historically splits alpha into a whole separate
// bitmap and works with 24bpp+8bpp, which is generally more complicated,
// more error-prone and just worse, but that's how LO code has been
// written and so there are many places in LO that expect this and
// do not work correctly with true 32bpp bitmaps.
//
// So ultimately the 24+8 split should be dumped (preferably in all of LO,
// not just the Skia-related code), but until all of LO works correctly
// with 32bpp keep this disabled in order to avoid such breakages.
//#define SKIA_USE_BITMAP32 1
#define SKIA_USE_BITMAP32 0
// GPU support (set by configure).
#undef SK_GANESH
// Vulkan support enabled (set by configure).
#undef SK_VULKAN
// Metal support enabled (set by configure).
#undef SK_METAL
// Memory allocator for Vulkan.
#define SK_USE_VMA 1
// Enable Vulkan validation layers (set by configure).
#undef SK_ENABLE_VK_LAYERS
#define SK_CODEC_DECODES_PNG 1
#define SK_ENCODE_PNG 1
// tdf#166339: Gamma-correct text rendering is needed for subpixel antialiasing
// to work properly. This option may make some text appear fainter than in other
// backends, but that is because the other backends don't handle gamma correctly.
#define SK_GAMMA_APPLY_TO_A8 1
// Platform-specific font gamma tuning to recover some contrast while still
// reducing artifacts. Most values are from BUILD.gn.
#if defined(_WIN32)
#define SK_GAMMA_SRGB 1
#define SK_GAMMA_CONTRAST 0.75
#elif defined(__APPLE__)
#define SK_GAMMA_SRGB 1
#define SK_GAMMA_CONTRAST 0.0
#else
#define SK_GAMMA_EXPONENT 1.2
#define SK_GAMMA_CONTRAST 0.2
#endif
// These are just to avoid warnings (some headers use them even with GL disabled).
#define SK_ASSUME_GL 1
#define SK_ASSUME_GL_ES 0
#define SK_ENABLE_SKSL 1
// See https://codereview.chromium.org/2089583002 . This makes raster drawing
// faster in some cases, it was made conditional because of some tests failing,
// but if I'm reading the review correctly the code is in fact fine and just
// those tests needed updating, which presumably has never happened.
#define SK_DRAWBITMAPRECT_FAST_OFFSET 1
// Default to BGRA. Skia already defaults to that on Windows, and it seems
// the default X11 visual is actually also BGRA.
#define SK_R32_SHIFT 16
// Enable Skia's internal checks depending on DBG_UTIL mode.
// ENABLE_SKIA_DEBUG controls whether to build with or without optimizations, and
// is set by using --enable-skia=debug.
#ifdef DBG_UTIL
#define SK_DEBUG
#define SK_ENABLE_DUMP_GPU
#else
#define SK_RELEASE
#endif // DBG_UTIL
// TODO ?
//#define SK_R32_SHIFT 16
#endif
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