| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "sk_tool_utils.h" |
| #include "sk_tool_utils_flags.h" |
| |
| #include "Resources.h" |
| #include "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkCommonFlags.h" |
| #include "SkFontMgr.h" |
| #include "SkFontStyle.h" |
| #include "SkPixelRef.h" |
| #include "SkPoint3.h" |
| #include "SkShader.h" |
| #include "SkTestScalerContext.h" |
| #include "SkTextBlob.h" |
| |
| DEFINE_bool(portableFonts, false, "Use portable fonts"); |
| |
| namespace sk_tool_utils { |
| |
| /* these are the default fonts chosen by Chrome for serif, sans-serif, and monospace */ |
| static const char* gStandardFontNames[][3] = { |
| { "Times", "Helvetica", "Courier" }, // Mac |
| { "Times New Roman", "Helvetica", "Courier" }, // iOS |
| { "Times New Roman", "Arial", "Courier New" }, // Win |
| { "Times New Roman", "Arial", "Monospace" }, // Ubuntu |
| { "serif", "sans-serif", "monospace" }, // Android |
| { "Tinos", "Arimo", "Cousine" } // ChromeOS |
| }; |
| |
| const char* platform_font_name(const char* name) { |
| SkString platform = major_platform_os_name(); |
| int index; |
| if (!strcmp(name, "serif")) { |
| index = 0; |
| } else if (!strcmp(name, "san-serif")) { |
| index = 1; |
| } else if (!strcmp(name, "monospace")) { |
| index = 2; |
| } else { |
| return name; |
| } |
| if (platform.equals("Mac")) { |
| return gStandardFontNames[0][index]; |
| } |
| if (platform.equals("iOS")) { |
| return gStandardFontNames[1][index]; |
| } |
| if (platform.equals("Win")) { |
| return gStandardFontNames[2][index]; |
| } |
| if (platform.equals("Ubuntu") || platform.equals("Debian")) { |
| return gStandardFontNames[3][index]; |
| } |
| if (platform.equals("Android")) { |
| return gStandardFontNames[4][index]; |
| } |
| if (platform.equals("ChromeOS")) { |
| return gStandardFontNames[5][index]; |
| } |
| return name; |
| } |
| |
| const char* platform_os_emoji() { |
| const char* osName = platform_os_name(); |
| if (!strcmp(osName, "Android") || !strcmp(osName, "Ubuntu") || !strcmp(osName, "Debian")) { |
| return "CBDT"; |
| } |
| if (!strncmp(osName, "Mac", 3) || !strncmp(osName, "iOS", 3)) { |
| return "SBIX"; |
| } |
| if (!strncmp(osName, "Win", 3)) { |
| return "COLR"; |
| } |
| return ""; |
| } |
| |
| sk_sp<SkTypeface> emoji_typeface() { |
| if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) { |
| return MakeResourceAsTypeface("/fonts/Funkster.ttf"); |
| } |
| if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX")) { |
| return SkTypeface::MakeFromName("Apple Color Emoji", SkFontStyle()); |
| } |
| if (!strcmp(sk_tool_utils::platform_os_emoji(), "COLR")) { |
| sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault()); |
| const char *colorEmojiFontName = "Segoe UI Emoji"; |
| sk_sp<SkTypeface> typeface(fm->matchFamilyStyle(colorEmojiFontName, SkFontStyle())); |
| if (typeface) { |
| return typeface; |
| } |
| sk_sp<SkTypeface> fallback(fm->matchFamilyStyleCharacter( |
| colorEmojiFontName, SkFontStyle(), nullptr /* bcp47 */, 0 /* bcp47Count */, |
| 0x1f4b0 /* character: 💰 */)); |
| if (fallback) { |
| return fallback; |
| } |
| // If we don't have Segoe UI Emoji and can't find a fallback, try Segoe UI Symbol. |
| // Windows 7 does not have Segoe UI Emoji; Segoe UI Symbol has the (non - color) emoji. |
| return SkTypeface::MakeFromName("Segoe UI Symbol", SkFontStyle()); |
| } |
| return nullptr; |
| } |
| |
| const char* emoji_sample_text() { |
| if (!strcmp(sk_tool_utils::platform_os_emoji(), "CBDT")) { |
| return "Hamburgefons"; |
| } |
| if (!strcmp(sk_tool_utils::platform_os_emoji(), "SBIX") || |
| !strcmp(sk_tool_utils::platform_os_emoji(), "COLR")) |
| { |
| return "\xF0\x9F\x92\xB0" "\xF0\x9F\x8F\xA1" "\xF0\x9F\x8E\x85" // 💰🏡🎅 |
| "\xF0\x9F\x8D\xAA" "\xF0\x9F\x8D\x95" "\xF0\x9F\x9A\x80" // 🍪🍕🚀 |
| "\xF0\x9F\x9A\xBB" "\xF0\x9F\x92\xA9" "\xF0\x9F\x93\xB7" // 🚻💩📷 |
| "\xF0\x9F\x93\xA6" // 📦 |
| "\xF0\x9F\x87\xBA" "\xF0\x9F\x87\xB8" "\xF0\x9F\x87\xA6"; // 🇺🇸🇦 |
| } |
| return ""; |
| } |
| |
| const char* platform_os_name() { |
| for (int index = 0; index < FLAGS_key.count(); index += 2) { |
| if (!strcmp("os", FLAGS_key[index])) { |
| return FLAGS_key[index + 1]; |
| } |
| } |
| // when running SampleApp or dm without a --key pair, omit the platform name |
| return ""; |
| } |
| |
| // omit version number in returned value |
| SkString major_platform_os_name() { |
| SkString name; |
| for (int index = 0; index < FLAGS_key.count(); index += 2) { |
| if (!strcmp("os", FLAGS_key[index])) { |
| const char* platform = FLAGS_key[index + 1]; |
| const char* end = platform; |
| while (*end && (*end < '0' || *end > '9')) { |
| ++end; |
| } |
| name.append(platform, end - platform); |
| break; |
| } |
| } |
| return name; |
| } |
| |
| const char* platform_extra_config(const char* config) { |
| for (int index = 0; index < FLAGS_key.count(); index += 2) { |
| if (!strcmp("extra_config", FLAGS_key[index]) && !strcmp(config, FLAGS_key[index + 1])) { |
| return config; |
| } |
| } |
| return ""; |
| } |
| |
| const char* colortype_name(SkColorType ct) { |
| switch (ct) { |
| case kUnknown_SkColorType: return "Unknown"; |
| case kAlpha_8_SkColorType: return "Alpha_8"; |
| case kARGB_4444_SkColorType: return "ARGB_4444"; |
| case kRGB_565_SkColorType: return "RGB_565"; |
| case kRGBA_8888_SkColorType: return "RGBA_8888"; |
| case kBGRA_8888_SkColorType: return "BGRA_8888"; |
| case kRGBA_F16_SkColorType: return "RGBA_F16"; |
| default: |
| SkASSERT(false); |
| return "unexpected colortype"; |
| } |
| } |
| |
| SkColor color_to_565(SkColor color) { |
| SkPMColor pmColor = SkPreMultiplyColor(color); |
| U16CPU color16 = SkPixel32ToPixel16(pmColor); |
| return SkPixel16ToColor(color16); |
| } |
| |
| sk_sp<SkTypeface> create_portable_typeface(const char* name, SkFontStyle style) { |
| return create_font(name, style); |
| } |
| |
| void set_portable_typeface(SkPaint* paint, const char* name, SkFontStyle style) { |
| paint->setTypeface(create_font(name, style)); |
| } |
| |
| void write_pixels(SkCanvas* canvas, const SkBitmap& bitmap, int x, int y, |
| SkColorType colorType, SkAlphaType alphaType) { |
| SkBitmap tmp(bitmap); |
| const SkImageInfo info = SkImageInfo::Make(tmp.width(), tmp.height(), colorType, alphaType); |
| |
| canvas->writePixels(info, tmp.getPixels(), tmp.rowBytes(), x, y); |
| } |
| |
| sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size) { |
| SkBitmap bm; |
| bm.allocPixels(SkImageInfo::MakeS32(2 * size, 2 * size, kPremul_SkAlphaType)); |
| bm.eraseColor(c1); |
| bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2); |
| bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2); |
| return SkShader::MakeBitmapShader( |
| bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); |
| } |
| |
| SkBitmap create_checkerboard_bitmap(int w, int h, SkColor c1, SkColor c2, int checkSize) { |
| SkBitmap bitmap; |
| bitmap.allocPixels(SkImageInfo::MakeS32(w, h, kPremul_SkAlphaType)); |
| SkCanvas canvas(bitmap); |
| |
| sk_tool_utils::draw_checkerboard(&canvas, c1, c2, checkSize); |
| return bitmap; |
| } |
| |
| void draw_checkerboard(SkCanvas* canvas, SkColor c1, SkColor c2, int size) { |
| SkPaint paint; |
| paint.setShader(create_checkerboard_shader(c1, c2, size)); |
| paint.setBlendMode(SkBlendMode::kSrc); |
| canvas->drawPaint(paint); |
| } |
| |
| SkBitmap create_string_bitmap(int w, int h, SkColor c, int x, int y, |
| int textSize, const char* str) { |
| SkBitmap bitmap; |
| bitmap.allocN32Pixels(w, h); |
| SkCanvas canvas(bitmap); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| sk_tool_utils::set_portable_typeface(&paint); |
| paint.setColor(c); |
| paint.setTextSize(SkIntToScalar(textSize)); |
| |
| canvas.clear(0x00000000); |
| canvas.drawString(str, SkIntToScalar(x), SkIntToScalar(y), paint); |
| |
| // Tag data as sRGB (without doing any color space conversion). Color-space aware configs |
| // will process this correctly but legacy configs will render as if this returned N32. |
| SkBitmap result; |
| result.setInfo(SkImageInfo::MakeS32(w, h, kPremul_SkAlphaType)); |
| result.setPixelRef(sk_ref_sp(bitmap.pixelRef()), 0, 0); |
| return result; |
| } |
| |
| void add_to_text_blob(SkTextBlobBuilder* builder, const char* text, const SkPaint& origPaint, |
| SkScalar x, SkScalar y) { |
| SkPaint paint(origPaint); |
| SkTDArray<uint16_t> glyphs; |
| |
| size_t len = strlen(text); |
| glyphs.append(paint.textToGlyphs(text, len, nullptr)); |
| paint.textToGlyphs(text, len, glyphs.begin()); |
| |
| paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| const SkTextBlobBuilder::RunBuffer& run = builder->allocRun(paint, glyphs.count(), x, y, |
| nullptr); |
| memcpy(run.glyphs, glyphs.begin(), glyphs.count() * sizeof(uint16_t)); |
| } |
| |
| static inline void norm_to_rgb(SkBitmap* bm, int x, int y, const SkVector3& norm) { |
| SkASSERT(SkScalarNearlyEqual(norm.length(), 1.0f)); |
| unsigned char r = static_cast<unsigned char>((0.5f * norm.fX + 0.5f) * 255); |
| unsigned char g = static_cast<unsigned char>((-0.5f * norm.fY + 0.5f) * 255); |
| unsigned char b = static_cast<unsigned char>((0.5f * norm.fZ + 0.5f) * 255); |
| *bm->getAddr32(x, y) = SkPackARGB32(0xFF, r, g, b); |
| } |
| |
| void create_hemi_normal_map(SkBitmap* bm, const SkIRect& dst) { |
| const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f), |
| dst.fTop + (dst.height() / 2.0f)); |
| const SkPoint halfSize = SkPoint::Make(dst.width() / 2.0f, dst.height() / 2.0f); |
| |
| SkVector3 norm; |
| |
| for (int y = dst.fTop; y < dst.fBottom; ++y) { |
| for (int x = dst.fLeft; x < dst.fRight; ++x) { |
| norm.fX = (x + 0.5f - center.fX) / halfSize.fX; |
| norm.fY = (y + 0.5f - center.fY) / halfSize.fY; |
| |
| SkScalar tmp = norm.fX * norm.fX + norm.fY * norm.fY; |
| if (tmp >= 1.0f) { |
| norm.set(0.0f, 0.0f, 1.0f); |
| } else { |
| norm.fZ = sqrtf(1.0f - tmp); |
| } |
| |
| norm_to_rgb(bm, x, y, norm); |
| } |
| } |
| } |
| |
| void create_frustum_normal_map(SkBitmap* bm, const SkIRect& dst) { |
| const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f), |
| dst.fTop + (dst.height() / 2.0f)); |
| |
| SkIRect inner = dst; |
| inner.inset(dst.width()/4, dst.height()/4); |
| |
| SkPoint3 norm; |
| const SkPoint3 left = SkPoint3::Make(-SK_ScalarRoot2Over2, 0.0f, SK_ScalarRoot2Over2); |
| const SkPoint3 up = SkPoint3::Make(0.0f, -SK_ScalarRoot2Over2, SK_ScalarRoot2Over2); |
| const SkPoint3 right = SkPoint3::Make(SK_ScalarRoot2Over2, 0.0f, SK_ScalarRoot2Over2); |
| const SkPoint3 down = SkPoint3::Make(0.0f, SK_ScalarRoot2Over2, SK_ScalarRoot2Over2); |
| |
| for (int y = dst.fTop; y < dst.fBottom; ++y) { |
| for (int x = dst.fLeft; x < dst.fRight; ++x) { |
| if (inner.contains(x, y)) { |
| norm.set(0.0f, 0.0f, 1.0f); |
| } else { |
| SkScalar locX = x + 0.5f - center.fX; |
| SkScalar locY = y + 0.5f - center.fY; |
| |
| if (locX >= 0.0f) { |
| if (locY > 0.0f) { |
| norm = locX >= locY ? right : down; // LR corner |
| } else { |
| norm = locX > -locY ? right : up; // UR corner |
| } |
| } else { |
| if (locY > 0.0f) { |
| norm = -locX > locY ? left : down; // LL corner |
| } else { |
| norm = locX > locY ? up : left; // UL corner |
| } |
| } |
| } |
| |
| norm_to_rgb(bm, x, y, norm); |
| } |
| } |
| } |
| |
| void create_tetra_normal_map(SkBitmap* bm, const SkIRect& dst) { |
| const SkPoint center = SkPoint::Make(dst.fLeft + (dst.width() / 2.0f), |
| dst.fTop + (dst.height() / 2.0f)); |
| |
| static const SkScalar k1OverRoot3 = 0.5773502692f; |
| |
| SkPoint3 norm; |
| const SkPoint3 leftUp = SkPoint3::Make(-k1OverRoot3, -k1OverRoot3, k1OverRoot3); |
| const SkPoint3 rightUp = SkPoint3::Make(k1OverRoot3, -k1OverRoot3, k1OverRoot3); |
| const SkPoint3 down = SkPoint3::Make(0.0f, SK_ScalarRoot2Over2, SK_ScalarRoot2Over2); |
| |
| for (int y = dst.fTop; y < dst.fBottom; ++y) { |
| for (int x = dst.fLeft; x < dst.fRight; ++x) { |
| SkScalar locX = x + 0.5f - center.fX; |
| SkScalar locY = y + 0.5f - center.fY; |
| |
| if (locX >= 0.0f) { |
| if (locY > 0.0f) { |
| norm = locX >= locY ? rightUp : down; // LR corner |
| } else { |
| norm = rightUp; |
| } |
| } else { |
| if (locY > 0.0f) { |
| norm = -locX > locY ? leftUp : down; // LL corner |
| } else { |
| norm = leftUp; |
| } |
| } |
| |
| norm_to_rgb(bm, x, y, norm); |
| } |
| } |
| } |
| |
| #if defined(_MSC_VER) |
| // MSVC takes ~2 minutes to compile this function with optimization. |
| // We don't really care to wait that long for this function. |
| #pragma optimize("", off) |
| #endif |
| void make_big_path(SkPath& path) { |
| #include "BigPathBench.inc" |
| } |
| |
| static float gaussian2d_value(int x, int y, float sigma) { |
| // don't bother with the scale term since we're just going to normalize the |
| // kernel anyways |
| float temp = expf(-(x*x + y*y)/(2*sigma*sigma)); |
| return temp; |
| } |
| |
| static float* create_2d_kernel(float sigma, int* filterSize) { |
| // We will actually take 2*halfFilterSize+1 samples (i.e., our filter kernel |
| // sizes are always odd) |
| int halfFilterSize = SkScalarCeilToInt(6*sigma)/2; |
| int wh = *filterSize = 2*halfFilterSize + 1; |
| |
| float* temp = new float[wh*wh]; |
| |
| float filterTot = 0.0f; |
| for (int yOff = 0; yOff < wh; ++yOff) { |
| for (int xOff = 0; xOff < wh; ++xOff) { |
| temp[yOff*wh+xOff] = gaussian2d_value(xOff-halfFilterSize, yOff-halfFilterSize, sigma); |
| |
| filterTot += temp[yOff*wh+xOff]; |
| } |
| } |
| |
| // normalize the kernel |
| for (int yOff = 0; yOff < wh; ++yOff) { |
| for (int xOff = 0; xOff < wh; ++xOff) { |
| temp[yOff*wh+xOff] /= filterTot; |
| } |
| } |
| |
| return temp; |
| } |
| |
| static SkPMColor blur_pixel(const SkBitmap& bm, int x, int y, float* kernel, int wh) { |
| SkASSERT(wh & 0x1); |
| |
| int halfFilterSize = (wh-1)/2; |
| |
| float r = 0.0f, g = 0.0f, b = 0.0f; |
| for (int yOff = 0; yOff < wh; ++yOff) { |
| int ySamp = y + yOff - halfFilterSize; |
| |
| if (ySamp < 0) { |
| ySamp = 0; |
| } else if (ySamp > bm.height()-1) { |
| ySamp = bm.height()-1; |
| } |
| |
| for (int xOff = 0; xOff < wh; ++xOff) { |
| int xSamp = x + xOff - halfFilterSize; |
| |
| if (xSamp < 0) { |
| xSamp = 0; |
| } else if (xSamp > bm.width()-1) { |
| xSamp = bm.width()-1; |
| } |
| |
| float filter = kernel[yOff*wh + xOff]; |
| |
| SkPMColor c = *bm.getAddr32(xSamp, ySamp); |
| |
| r += SkGetPackedR32(c) * filter; |
| g += SkGetPackedG32(c) * filter; |
| b += SkGetPackedB32(c) * filter; |
| } |
| } |
| |
| U8CPU r8, g8, b8; |
| |
| r8 = (U8CPU) (r+0.5f); |
| g8 = (U8CPU) (g+0.5f); |
| b8 = (U8CPU) (b+0.5f); |
| |
| return SkPackARGB32(255, r8, g8, b8); |
| } |
| |
| SkBitmap slow_blur(const SkBitmap& src, float sigma) { |
| SkBitmap dst; |
| |
| dst.allocN32Pixels(src.width(), src.height(), true); |
| |
| int wh; |
| std::unique_ptr<float[]> kernel(create_2d_kernel(sigma, &wh)); |
| |
| for (int y = 0; y < src.height(); ++y) { |
| for (int x = 0; x < src.width(); ++x) { |
| *dst.getAddr32(x, y) = blur_pixel(src, x, y, kernel.get(), wh); |
| } |
| } |
| |
| return dst; |
| } |
| |
| // compute the intersection point between the diagonal and the ellipse in the |
| // lower right corner |
| static SkPoint intersection(SkScalar w, SkScalar h) { |
| SkASSERT(w > 0.0f || h > 0.0f); |
| |
| return SkPoint::Make(w / SK_ScalarSqrt2, h / SK_ScalarSqrt2); |
| } |
| |
| // Use the intersection of the corners' diagonals with their ellipses to shrink |
| // the bounding rect |
| SkRect compute_central_occluder(const SkRRect& rr) { |
| const SkRect r = rr.getBounds(); |
| |
| SkScalar newL = r.fLeft, newT = r.fTop, newR = r.fRight, newB = r.fBottom; |
| |
| SkVector radii = rr.radii(SkRRect::kUpperLeft_Corner); |
| if (!radii.isZero()) { |
| SkPoint p = intersection(radii.fX, radii.fY); |
| |
| newL = SkTMax(newL, r.fLeft + radii.fX - p.fX); |
| newT = SkTMax(newT, r.fTop + radii.fY - p.fY); |
| } |
| |
| radii = rr.radii(SkRRect::kUpperRight_Corner); |
| if (!radii.isZero()) { |
| SkPoint p = intersection(radii.fX, radii.fY); |
| |
| newR = SkTMin(newR, r.fRight + p.fX - radii.fX); |
| newT = SkTMax(newT, r.fTop + radii.fY - p.fY); |
| } |
| |
| radii = rr.radii(SkRRect::kLowerRight_Corner); |
| if (!radii.isZero()) { |
| SkPoint p = intersection(radii.fX, radii.fY); |
| |
| newR = SkTMin(newR, r.fRight + p.fX - radii.fX); |
| newB = SkTMin(newB, r.fBottom - radii.fY + p.fY); |
| } |
| |
| radii = rr.radii(SkRRect::kLowerLeft_Corner); |
| if (!radii.isZero()) { |
| SkPoint p = intersection(radii.fX, radii.fY); |
| |
| newL = SkTMax(newL, r.fLeft + radii.fX - p.fX); |
| newB = SkTMin(newB, r.fBottom - radii.fY + p.fY); |
| } |
| |
| return SkRect::MakeLTRB(newL, newT, newR, newB); |
| } |
| |
| // The widest inset rect |
| SkRect compute_widest_occluder(const SkRRect& rr) { |
| const SkRect& r = rr.getBounds(); |
| |
| const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner); |
| const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner); |
| const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner); |
| const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner); |
| |
| SkScalar maxT = SkTMax(ul.fY, ur.fY); |
| SkScalar maxB = SkTMax(ll.fY, lr.fY); |
| |
| return SkRect::MakeLTRB(r.fLeft, r.fTop + maxT, r.fRight, r.fBottom - maxB); |
| |
| } |
| |
| // The tallest inset rect |
| SkRect compute_tallest_occluder(const SkRRect& rr) { |
| const SkRect& r = rr.getBounds(); |
| |
| const SkVector& ul = rr.radii(SkRRect::kUpperLeft_Corner); |
| const SkVector& ur = rr.radii(SkRRect::kUpperRight_Corner); |
| const SkVector& lr = rr.radii(SkRRect::kLowerRight_Corner); |
| const SkVector& ll = rr.radii(SkRRect::kLowerLeft_Corner); |
| |
| SkScalar maxL = SkTMax(ul.fX, ll.fX); |
| SkScalar maxR = SkTMax(ur.fX, lr.fX); |
| |
| return SkRect::MakeLTRB(r.fLeft + maxL, r.fTop, r.fRight - maxR, r.fBottom); |
| } |
| |
| bool copy_to(SkBitmap* dst, SkColorType dstColorType, const SkBitmap& src) { |
| SkPixmap srcPM; |
| if (!src.peekPixels(&srcPM)) { |
| return false; |
| } |
| |
| SkBitmap tmpDst; |
| SkImageInfo dstInfo = srcPM.info().makeColorType(dstColorType); |
| if (!tmpDst.setInfo(dstInfo)) { |
| return false; |
| } |
| |
| if (!tmpDst.tryAllocPixels()) { |
| return false; |
| } |
| |
| SkPixmap dstPM; |
| if (!tmpDst.peekPixels(&dstPM)) { |
| return false; |
| } |
| |
| if (!srcPM.readPixels(dstPM)) { |
| return false; |
| } |
| |
| dst->swap(tmpDst); |
| return true; |
| } |
| |
| void copy_to_g8(SkBitmap* dst, const SkBitmap& src) { |
| SkASSERT(kBGRA_8888_SkColorType == src.colorType() || |
| kRGBA_8888_SkColorType == src.colorType()); |
| |
| SkImageInfo grayInfo = src.info().makeColorType(kGray_8_SkColorType); |
| dst->allocPixels(grayInfo); |
| uint8_t* dst8 = (uint8_t*)dst->getPixels(); |
| const uint32_t* src32 = (const uint32_t*)src.getPixels(); |
| |
| const int w = src.width(); |
| const int h = src.height(); |
| const bool isBGRA = (kBGRA_8888_SkColorType == src.colorType()); |
| for (int y = 0; y < h; ++y) { |
| if (isBGRA) { |
| // BGRA |
| for (int x = 0; x < w; ++x) { |
| uint32_t s = src32[x]; |
| dst8[x] = SkComputeLuminance((s >> 16) & 0xFF, (s >> 8) & 0xFF, s & 0xFF); |
| } |
| } else { |
| // RGBA |
| for (int x = 0; x < w; ++x) { |
| uint32_t s = src32[x]; |
| dst8[x] = SkComputeLuminance(s & 0xFF, (s >> 8) & 0xFF, (s >> 16) & 0xFF); |
| } |
| } |
| src32 = (const uint32_t*)((const char*)src32 + src.rowBytes()); |
| dst8 += dst->rowBytes(); |
| } |
| } |
| |
| } // namespace sk_tool_utils |
