diff options
author | Mike Reed <reed@google.com> | 2017-08-08 15:48:54 -0400 |
---|---|---|
committer | Skia Commit-Bot <skia-commit-bot@chromium.org> | 2017-08-08 20:07:32 +0000 |
commit | 5a625e08f05157c1519012d8d04942c8f7606ba8 (patch) | |
tree | cbfd3ca8e12424507bf8d2a99023efd4fed2872c /tools/sk_tool_utils.cpp | |
parent | 50d0d053576a4895bdd4c837bf990b499da209cb (diff) |
add tool_util to compare images
Bug: skia:
Change-Id: I826190aa15cf42a3ca7f3c7d5271ead5b514c116
Reviewed-on: https://skia-review.googlesource.com/32220
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
Diffstat (limited to 'tools/sk_tool_utils.cpp')
-rw-r--r-- | tools/sk_tool_utils.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/tools/sk_tool_utils.cpp b/tools/sk_tool_utils.cpp index a8d877bf8b..380e1d78bc 100644 --- a/tools/sk_tool_utils.cpp +++ b/tools/sk_tool_utils.cpp @@ -15,6 +15,7 @@ #include "SkFontMgr.h" #include "SkFontStyle.h" #include "SkPixelRef.h" +#include "SkPM4f.h" #include "SkPoint3.h" #include "SkShader.h" #include "SkTestScalerContext.h" @@ -505,4 +506,91 @@ void copy_to_g8(SkBitmap* dst, const SkBitmap& src) { } } + ////////////////////////////////////////////////////////////////////////////////////////////// + + static int scale255(float x) { + return sk_float_round2int(x * 255); + } + + static unsigned diff(const SkColorType ct, const void* a, const void* b) { + int dr = 0, + dg = 0, + db = 0, + da = 0; + switch (ct) { + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: { + SkPMColor c0 = *(const SkPMColor*)a; + SkPMColor c1 = *(const SkPMColor*)b; + dr = SkGetPackedR32(c0) - SkGetPackedR32(c1); + dg = SkGetPackedG32(c0) - SkGetPackedG32(c1); + db = SkGetPackedB32(c0) - SkGetPackedB32(c1); + da = SkGetPackedA32(c0) - SkGetPackedA32(c1); + } break; + case kRGB_565_SkColorType: { + uint16_t c0 = *(const uint16_t*)a; + uint16_t c1 = *(const uint16_t*)b; + dr = SkGetPackedR16(c0) - SkGetPackedR16(c1); + dg = SkGetPackedG16(c0) - SkGetPackedG16(c1); + db = SkGetPackedB16(c0) - SkGetPackedB16(c1); + } break; + case kARGB_4444_SkColorType: { + uint16_t c0 = *(const uint16_t*)a; + uint16_t c1 = *(const uint16_t*)b; + dr = SkGetPackedR4444(c0) - SkGetPackedR4444(c1); + dg = SkGetPackedG4444(c0) - SkGetPackedG4444(c1); + db = SkGetPackedB4444(c0) - SkGetPackedB4444(c1); + da = SkGetPackedA4444(c0) - SkGetPackedA4444(c1); + } break; + case kAlpha_8_SkColorType: + case kGray_8_SkColorType: + da = (const uint8_t*)a - (const uint8_t*)b; + break; + case kRGBA_F16_SkColorType: { + const SkPM4f* c0 = (const SkPM4f*)a; + const SkPM4f* c1 = (const SkPM4f*)b; + dr = scale255(c0->r() - c1->r()); + dg = scale255(c0->g() - c1->g()); + db = scale255(c0->b() - c1->b()); + da = scale255(c0->a() - c1->a()); + } break; + default: + return 0; + } + dr = SkAbs32(dr); + dg = SkAbs32(dg); + db = SkAbs32(db); + da = SkAbs32(da); + return SkMax32(dr, SkMax32(dg, SkMax32(db, da))); + } + + bool equal_pixels(const SkPixmap& a, const SkPixmap& b, unsigned maxDiff) { + if (a.width() != b.width() || + a.height() != b.height() || + a.colorType() != b.colorType() || + a.colorSpace() != b.colorSpace()) + { + return false; + } + + for (int y = 0; y < a.height(); ++y) { + const char* aptr = (const char*)a.addr(0, y); + const char* bptr = (const char*)b.addr(0, y); + if (memcmp(aptr, bptr, a.width() * a.info().bytesPerPixel())) { + for (int x = 0; x < a.width(); ++x) { + if (diff(a.colorType(), a.addr(x, y), b.addr(x, y)) > maxDiff) { + return false; + } + } + } + aptr += a.rowBytes(); + bptr += b.rowBytes(); + } + return true; + } + + bool equal_pixels(const SkBitmap& bm0, const SkBitmap& bm1, unsigned maxDiff) { + SkPixmap pm0, pm1; + return bm0.peekPixels(&pm0) && bm1.peekPixels(&pm1) && equal_pixels(pm0, pm1, maxDiff); + } } // namespace sk_tool_utils |