reed | 92fc2ae | 2015-05-22 08:06:21 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
Hal Canary | c640d0d | 2018-06-13 09:59:02 -0400 | [diff] [blame] | 8 | #include "SkPixmap.h" |
| 9 | |
Hal Canary | 4cba3fe | 2016-12-07 14:59:27 -0500 | [diff] [blame] | 10 | #include "SkBitmap.h" |
| 11 | #include "SkCanvas.h" |
Cary Clark | a4083c9 | 2017-09-15 11:59:23 -0400 | [diff] [blame] | 12 | #include "SkColorData.h" |
Matt Sarett | 485c499 | 2017-02-14 14:18:27 -0500 | [diff] [blame] | 13 | #include "SkConvertPixels.h" |
fmalita | 3a94c6c | 2016-02-04 13:09:59 -0800 | [diff] [blame] | 14 | #include "SkData.h" |
Hal Canary | c640d0d | 2018-06-13 09:59:02 -0400 | [diff] [blame] | 15 | #include "SkHalf.h" |
Matt Sarett | cb6266b | 2017-01-17 10:48:53 -0500 | [diff] [blame] | 16 | #include "SkImageInfoPriv.h" |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 17 | #include "SkImageShader.h" |
reed | 183b57f | 2015-06-05 14:33:17 -0700 | [diff] [blame] | 18 | #include "SkMask.h" |
Hal Canary | 4cba3fe | 2016-12-07 14:59:27 -0500 | [diff] [blame] | 19 | #include "SkNx.h" |
reed | dd9ffea | 2016-02-18 12:39:14 -0800 | [diff] [blame] | 20 | #include "SkPM4f.h" |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 21 | #include "SkPixmapPriv.h" |
Matt Sarett | 03dd6d5 | 2017-01-23 12:15:09 -0500 | [diff] [blame] | 22 | #include "SkReadPixelsRec.h" |
Hal Canary | 4cba3fe | 2016-12-07 14:59:27 -0500 | [diff] [blame] | 23 | #include "SkSurface.h" |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 24 | #include "SkTemplates.h" |
Hal Canary | c640d0d | 2018-06-13 09:59:02 -0400 | [diff] [blame] | 25 | #include "SkTo.h" |
Mike Reed | 5dd202d | 2018-02-06 23:05:36 +0000 | [diff] [blame] | 26 | #include "SkUnPreMultiply.h" |
Hal Canary | 4cba3fe | 2016-12-07 14:59:27 -0500 | [diff] [blame] | 27 | #include "SkUtils.h" |
reed | 92fc2ae | 2015-05-22 08:06:21 -0700 | [diff] [blame] | 28 | |
Ben Wagner | f08d1d0 | 2018-06-18 15:11:00 -0400 | [diff] [blame] | 29 | #include <utility> |
| 30 | |
reed | 95d343f | 2015-05-23 13:21:06 -0700 | [diff] [blame] | 31 | ///////////////////////////////////////////////////////////////////////////////////////////////// |
| 32 | |
reed | 884e97c | 2015-05-26 11:31:54 -0700 | [diff] [blame] | 33 | void SkPixmap::reset() { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 34 | fPixels = nullptr; |
reed | 884e97c | 2015-05-26 11:31:54 -0700 | [diff] [blame] | 35 | fRowBytes = 0; |
| 36 | fInfo = SkImageInfo::MakeUnknown(); |
| 37 | } |
| 38 | |
Mike Reed | 086a427 | 2017-07-18 10:53:11 -0400 | [diff] [blame] | 39 | void SkPixmap::reset(const SkImageInfo& info, const void* addr, size_t rowBytes) { |
reed | 884e97c | 2015-05-26 11:31:54 -0700 | [diff] [blame] | 40 | if (addr) { |
| 41 | SkASSERT(info.validRowBytes(rowBytes)); |
| 42 | } |
| 43 | fPixels = addr; |
reed | 884e97c | 2015-05-26 11:31:54 -0700 | [diff] [blame] | 44 | fRowBytes = rowBytes; |
| 45 | fInfo = info; |
| 46 | } |
| 47 | |
reed | 183b57f | 2015-06-05 14:33:17 -0700 | [diff] [blame] | 48 | bool SkPixmap::reset(const SkMask& src) { |
| 49 | if (SkMask::kA8_Format == src.fFormat) { |
| 50 | this->reset(SkImageInfo::MakeA8(src.fBounds.width(), src.fBounds.height()), |
Mike Reed | 086a427 | 2017-07-18 10:53:11 -0400 | [diff] [blame] | 51 | src.fImage, src.fRowBytes); |
reed | 183b57f | 2015-06-05 14:33:17 -0700 | [diff] [blame] | 52 | return true; |
| 53 | } |
| 54 | this->reset(); |
| 55 | return false; |
| 56 | } |
| 57 | |
msarett | 804b461 | 2016-06-09 11:03:45 -0700 | [diff] [blame] | 58 | void SkPixmap::setColorSpace(sk_sp<SkColorSpace> cs) { |
| 59 | fInfo = fInfo.makeColorSpace(std::move(cs)); |
| 60 | } |
| 61 | |
reed | 183b57f | 2015-06-05 14:33:17 -0700 | [diff] [blame] | 62 | bool SkPixmap::extractSubset(SkPixmap* result, const SkIRect& subset) const { |
| 63 | SkIRect srcRect, r; |
| 64 | srcRect.set(0, 0, this->width(), this->height()); |
| 65 | if (!r.intersect(srcRect, subset)) { |
| 66 | return false; // r is empty (i.e. no intersection) |
| 67 | } |
halcanary | 9d524f2 | 2016-03-29 09:03:52 -0700 | [diff] [blame] | 68 | |
reed | 183b57f | 2015-06-05 14:33:17 -0700 | [diff] [blame] | 69 | // If the upper left of the rectangle was outside the bounds of this SkBitmap, we should have |
| 70 | // exited above. |
| 71 | SkASSERT(static_cast<unsigned>(r.fLeft) < static_cast<unsigned>(this->width())); |
| 72 | SkASSERT(static_cast<unsigned>(r.fTop) < static_cast<unsigned>(this->height())); |
| 73 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 74 | const void* pixels = nullptr; |
reed | 183b57f | 2015-06-05 14:33:17 -0700 | [diff] [blame] | 75 | if (fPixels) { |
| 76 | const size_t bpp = fInfo.bytesPerPixel(); |
| 77 | pixels = (const uint8_t*)fPixels + r.fTop * fRowBytes + r.fLeft * bpp; |
| 78 | } |
Mike Reed | 26e9ddd | 2017-07-17 17:33:53 -0400 | [diff] [blame] | 79 | result->reset(fInfo.makeWH(r.width(), r.height()), pixels, fRowBytes); |
reed | 183b57f | 2015-06-05 14:33:17 -0700 | [diff] [blame] | 80 | return true; |
| 81 | } |
| 82 | |
Brian Osman | f6db495 | 2018-07-16 13:06:02 -0400 | [diff] [blame] | 83 | bool SkPixmap::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB, |
| 84 | int x, int y) const { |
Matt Sarett | 03dd6d5 | 2017-01-23 12:15:09 -0500 | [diff] [blame] | 85 | if (!SkImageInfoValidConversion(dstInfo, fInfo)) { |
reed | 95d343f | 2015-05-23 13:21:06 -0700 | [diff] [blame] | 86 | return false; |
| 87 | } |
Matt Sarett | cb6266b | 2017-01-17 10:48:53 -0500 | [diff] [blame] | 88 | |
Matt Sarett | 03dd6d5 | 2017-01-23 12:15:09 -0500 | [diff] [blame] | 89 | SkReadPixelsRec rec(dstInfo, dstPixels, dstRB, x, y); |
| 90 | if (!rec.trim(fInfo.width(), fInfo.height())) { |
reed | 95d343f | 2015-05-23 13:21:06 -0700 | [diff] [blame] | 91 | return false; |
| 92 | } |
halcanary | 9d524f2 | 2016-03-29 09:03:52 -0700 | [diff] [blame] | 93 | |
Matt Sarett | 03dd6d5 | 2017-01-23 12:15:09 -0500 | [diff] [blame] | 94 | const void* srcPixels = this->addr(rec.fX, rec.fY); |
| 95 | const SkImageInfo srcInfo = fInfo.makeWH(rec.fInfo.width(), rec.fInfo.height()); |
Brian Osman | b62f50c | 2018-07-12 14:44:27 -0400 | [diff] [blame] | 96 | SkConvertPixels(rec.fInfo, rec.fPixels, rec.fRowBytes, srcInfo, srcPixels, this->rowBytes()); |
Matt Sarett | 8572d85 | 2017-02-14 11:21:02 -0500 | [diff] [blame] | 97 | return true; |
reed | 95d343f | 2015-05-23 13:21:06 -0700 | [diff] [blame] | 98 | } |
reed | 183b57f | 2015-06-05 14:33:17 -0700 | [diff] [blame] | 99 | |
Mike Klein | 9ec77b5 | 2018-09-18 12:19:57 +0000 | [diff] [blame^] | 100 | static uint16_t pack_8888_to_4444(unsigned a, unsigned r, unsigned g, unsigned b) { |
| 101 | unsigned pixel = (SkA32To4444(a) << SK_A4444_SHIFT) | |
| 102 | (SkR32To4444(r) << SK_R4444_SHIFT) | |
| 103 | (SkG32To4444(g) << SK_G4444_SHIFT) | |
| 104 | (SkB32To4444(b) << SK_B4444_SHIFT); |
| 105 | return SkToU16(pixel); |
reed | 7aefe03 | 2015-06-08 10:22:22 -0700 | [diff] [blame] | 106 | } |
| 107 | |
Mike Klein | 9ec77b5 | 2018-09-18 12:19:57 +0000 | [diff] [blame^] | 108 | bool SkPixmap::erase(SkColor color, const SkIRect& inArea) const { |
| 109 | if (nullptr == fPixels) { |
| 110 | return false; |
| 111 | } |
| 112 | SkIRect area; |
| 113 | if (!area.intersect(this->bounds(), inArea)) { |
| 114 | return false; |
| 115 | } |
reed | 7aefe03 | 2015-06-08 10:22:22 -0700 | [diff] [blame] | 116 | |
Mike Klein | 9ec77b5 | 2018-09-18 12:19:57 +0000 | [diff] [blame^] | 117 | U8CPU a = SkColorGetA(color); |
| 118 | U8CPU r = SkColorGetR(color); |
| 119 | U8CPU g = SkColorGetG(color); |
| 120 | U8CPU b = SkColorGetB(color); |
reed | 7aefe03 | 2015-06-08 10:22:22 -0700 | [diff] [blame] | 121 | |
Mike Klein | 9ec77b5 | 2018-09-18 12:19:57 +0000 | [diff] [blame^] | 122 | int height = area.height(); |
| 123 | const int width = area.width(); |
| 124 | const int rowBytes = this->rowBytes(); |
| 125 | |
| 126 | if (color == 0 |
| 127 | && width == this->rowBytesAsPixels() |
| 128 | && inArea == this->bounds()) { |
| 129 | // All formats represent SkColor(0) as byte 0. |
| 130 | memset(this->writable_addr(), 0, (int64_t)height * rowBytes); |
Mike Klein | 3785471 | 2018-06-26 11:43:06 -0400 | [diff] [blame] | 131 | return true; |
reed | 3601f28 | 2016-02-05 11:18:39 -0800 | [diff] [blame] | 132 | } |
Mike Klein | 9ec77b5 | 2018-09-18 12:19:57 +0000 | [diff] [blame^] | 133 | |
| 134 | switch (this->colorType()) { |
| 135 | case kGray_8_SkColorType: { |
| 136 | if (255 != a) { |
| 137 | r = SkMulDiv255Round(r, a); |
| 138 | g = SkMulDiv255Round(g, a); |
| 139 | b = SkMulDiv255Round(b, a); |
| 140 | } |
| 141 | int gray = SkComputeLuminance(r, g, b); |
| 142 | uint8_t* p = this->writable_addr8(area.fLeft, area.fTop); |
| 143 | while (--height >= 0) { |
| 144 | memset(p, gray, width); |
| 145 | p += rowBytes; |
| 146 | } |
| 147 | break; |
| 148 | } |
| 149 | case kAlpha_8_SkColorType: { |
| 150 | uint8_t* p = this->writable_addr8(area.fLeft, area.fTop); |
| 151 | while (--height >= 0) { |
| 152 | memset(p, a, width); |
| 153 | p += rowBytes; |
| 154 | } |
| 155 | break; |
| 156 | } |
| 157 | |
| 158 | case kARGB_4444_SkColorType: |
| 159 | case kRGB_565_SkColorType: { |
| 160 | uint16_t* p = this->writable_addr16(area.fLeft, area.fTop); |
| 161 | uint16_t v; |
| 162 | |
| 163 | // make rgb premultiplied |
| 164 | if (255 != a) { |
| 165 | r = SkMulDiv255Round(r, a); |
| 166 | g = SkMulDiv255Round(g, a); |
| 167 | b = SkMulDiv255Round(b, a); |
| 168 | } |
| 169 | |
| 170 | if (kARGB_4444_SkColorType == this->colorType()) { |
| 171 | v = pack_8888_to_4444(a, r, g, b); |
| 172 | } else { |
| 173 | v = SkPackRGB16(r >> (8 - SK_R16_BITS), |
| 174 | g >> (8 - SK_G16_BITS), |
| 175 | b >> (8 - SK_B16_BITS)); |
| 176 | } |
| 177 | while (--height >= 0) { |
| 178 | sk_memset16(p, v, width); |
| 179 | p = (uint16_t*)((char*)p + rowBytes); |
| 180 | } |
| 181 | break; |
| 182 | } |
| 183 | |
| 184 | case kRGB_888x_SkColorType: |
| 185 | a = 255; // then fallthrough to 8888 |
| 186 | case kRGBA_8888_SkColorType: |
| 187 | case kBGRA_8888_SkColorType: { |
| 188 | uint32_t* p = this->writable_addr32(area.fLeft, area.fTop); |
| 189 | |
| 190 | if (255 != a && kPremul_SkAlphaType == this->alphaType()) { |
| 191 | r = SkMulDiv255Round(r, a); |
| 192 | g = SkMulDiv255Round(g, a); |
| 193 | b = SkMulDiv255Round(b, a); |
| 194 | } |
| 195 | uint32_t v = kBGRA_8888_SkColorType == this->colorType() |
| 196 | ? SkPackARGB_as_BGRA(a, r, g, b) // bgra 8888 |
| 197 | : SkPackARGB_as_RGBA(a, r, g, b); // rgba 8888 or rgb 888 |
| 198 | |
| 199 | while (--height >= 0) { |
| 200 | sk_memset32(p, v, width); |
| 201 | p = (uint32_t*)((char*)p + rowBytes); |
| 202 | } |
| 203 | break; |
| 204 | } |
| 205 | |
| 206 | case kRGB_101010x_SkColorType: |
| 207 | a = 255; // then fallthrough to 1010102 |
| 208 | case kRGBA_1010102_SkColorType: { |
| 209 | uint32_t* p = this->writable_addr32(area.fLeft, area.fTop); |
| 210 | |
| 211 | float R = r * (1/255.0f), |
| 212 | G = g * (1/255.0f), |
| 213 | B = b * (1/255.0f), |
| 214 | A = a * (1/255.0f); |
| 215 | if (a != 255 && this->alphaType() == kPremul_SkAlphaType) { |
| 216 | R *= A; |
| 217 | G *= A; |
| 218 | B *= A; |
| 219 | } |
| 220 | uint32_t v = (uint32_t)(R * 1023.0f) << 0 |
| 221 | | (uint32_t)(G * 1023.0f) << 10 |
| 222 | | (uint32_t)(B * 1023.0f) << 20 |
| 223 | | (uint32_t)(A * 3.0f) << 30; |
| 224 | while (--height >= 0) { |
| 225 | sk_memset32(p, v, width); |
| 226 | p = (uint32_t*)((char*)p + rowBytes); |
| 227 | } |
| 228 | break; |
| 229 | } |
| 230 | |
| 231 | case kRGBA_F16_SkColorType: |
| 232 | case kRGBA_F32_SkColorType: |
| 233 | // The colorspace is unspecified, so assume linear just like getColor(). |
| 234 | this->erase(SkColor4f{(1 / 255.0f) * r, |
| 235 | (1 / 255.0f) * g, |
| 236 | (1 / 255.0f) * b, |
| 237 | (1 / 255.0f) * a}, &area); |
| 238 | break; |
| 239 | default: |
| 240 | return false; // no change, so don't call notifyPixelsChanged() |
| 241 | } |
| 242 | return true; |
| 243 | } |
| 244 | |
| 245 | bool SkPixmap::erase(const SkColor4f& origColor, const SkIRect* subset) const { |
| 246 | SkPixmap pm; |
| 247 | if (subset) { |
| 248 | if (!this->extractSubset(&pm, *subset)) { |
| 249 | return false; |
| 250 | } |
| 251 | } else { |
| 252 | pm = *this; |
| 253 | } |
| 254 | |
| 255 | const SkColor4f color = origColor.pin(); |
| 256 | |
| 257 | if (pm.colorType() == kRGBA_F16_SkColorType) { |
| 258 | const uint64_t half4 = color.premul().toF16(); |
| 259 | for (int y = 0; y < pm.height(); ++y) { |
| 260 | sk_memset64(pm.writable_addr64(0, y), half4, pm.width()); |
| 261 | } |
| 262 | return true; |
| 263 | } |
| 264 | |
| 265 | if (pm.colorType() == kRGBA_F32_SkColorType) { |
| 266 | const SkPM4f rgba = color.premul(); |
| 267 | for (int y = 0; y < pm.height(); ++y) { |
| 268 | auto row = (float*)pm.writable_addr(0, y); |
| 269 | for (int x = 0; x < pm.width(); ++x) { |
| 270 | row[4*x+0] = rgba.r(); |
| 271 | row[4*x+1] = rgba.g(); |
| 272 | row[4*x+2] = rgba.b(); |
| 273 | row[4*x+3] = rgba.a(); |
| 274 | } |
| 275 | } |
| 276 | return true; |
| 277 | } |
| 278 | |
| 279 | return pm.erase(color.toSkColor()); |
reed | 3601f28 | 2016-02-05 11:18:39 -0800 | [diff] [blame] | 280 | } |
| 281 | |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 282 | bool SkPixmap::scalePixels(const SkPixmap& actualDst, SkFilterQuality quality) const { |
| 283 | // We may need to tweak how we interpret these just a little below, so we make copies. |
| 284 | SkPixmap src = *this, |
| 285 | dst = actualDst; |
Mike Klein | 47cf048 | 2018-02-09 18:57:54 +0000 | [diff] [blame] | 286 | |
reed | 0955303 | 2015-11-23 12:32:16 -0800 | [diff] [blame] | 287 | // Can't do anthing with empty src or dst |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 288 | if (src.width() <= 0 || src.height() <= 0 || |
| 289 | dst.width() <= 0 || dst.height() <= 0) { |
reed | 0955303 | 2015-11-23 12:32:16 -0800 | [diff] [blame] | 290 | return false; |
| 291 | } |
| 292 | |
| 293 | // no scaling involved? |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 294 | if (src.width() == dst.width() && src.height() == dst.height()) { |
| 295 | return src.readPixels(dst); |
reed | 0955303 | 2015-11-23 12:32:16 -0800 | [diff] [blame] | 296 | } |
| 297 | |
Mike Klein | fc9624c | 2018-09-06 11:25:21 -0400 | [diff] [blame] | 298 | // If src and dst are both unpremul, we'll fake the source out to appear as if premul, |
| 299 | // and mark the destination as opaque. This odd combination allows us to scale unpremul |
| 300 | // pixels without ever premultiplying them (perhaps losing information in the color channels). |
| 301 | // This is an idiosyncratic feature of scalePixels(), and is tested by scalepixels_unpremul GM. |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 302 | bool clampAsIfUnpremul = false; |
| 303 | if (src.alphaType() == kUnpremul_SkAlphaType && |
| 304 | dst.alphaType() == kUnpremul_SkAlphaType) { |
| 305 | src.reset(src.info().makeAlphaType(kPremul_SkAlphaType), src.addr(), src.rowBytes()); |
Mike Klein | fc9624c | 2018-09-06 11:25:21 -0400 | [diff] [blame] | 306 | dst.reset(dst.info().makeAlphaType(kOpaque_SkAlphaType), dst.addr(), dst.rowBytes()); |
Mike Klein | 47cf048 | 2018-02-09 18:57:54 +0000 | [diff] [blame] | 307 | |
Mike Klein | fc9624c | 2018-09-06 11:25:21 -0400 | [diff] [blame] | 308 | // We'll need to tell the image shader to clamp to [0,1] instead of the |
| 309 | // usual [0,a] when using a bicubic scaling (kHigh_SkFilterQuality). |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 310 | clampAsIfUnpremul = true; |
Mike Klein | 47cf048 | 2018-02-09 18:57:54 +0000 | [diff] [blame] | 311 | } |
| 312 | |
reed | 0955303 | 2015-11-23 12:32:16 -0800 | [diff] [blame] | 313 | SkBitmap bitmap; |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 314 | if (!bitmap.installPixels(src)) { |
reed | 0955303 | 2015-11-23 12:32:16 -0800 | [diff] [blame] | 315 | return false; |
| 316 | } |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 317 | bitmap.setImmutable(); // Don't copy when we create an image. |
| 318 | bitmap.setIsVolatile(true); // Disable any caching. |
reed | 0955303 | 2015-11-23 12:32:16 -0800 | [diff] [blame] | 319 | |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 320 | SkMatrix scale = SkMatrix::MakeRectToRect(SkRect::Make(src.bounds()), |
| 321 | SkRect::Make(dst.bounds()), |
| 322 | SkMatrix::kFill_ScaleToFit); |
| 323 | |
| 324 | // We'll create a shader to do this draw so we have control over the bicubic clamp. |
| 325 | sk_sp<SkShader> shader = SkImageShader::Make(SkImage::MakeFromBitmap(bitmap), |
| 326 | SkShader::kClamp_TileMode, |
| 327 | SkShader::kClamp_TileMode, |
| 328 | &scale, |
| 329 | clampAsIfUnpremul); |
| 330 | |
| 331 | sk_sp<SkSurface> surface = SkSurface::MakeRasterDirect(dst.info(), |
| 332 | dst.writable_addr(), |
| 333 | dst.rowBytes()); |
| 334 | if (!shader || !surface) { |
reed | 0955303 | 2015-11-23 12:32:16 -0800 | [diff] [blame] | 335 | return false; |
| 336 | } |
| 337 | |
| 338 | SkPaint paint; |
Mike Klein | 47cf048 | 2018-02-09 18:57:54 +0000 | [diff] [blame] | 339 | paint.setBlendMode(SkBlendMode::kSrc); |
Mike Klein | 1f31309 | 2018-01-03 10:30:21 -0500 | [diff] [blame] | 340 | paint.setFilterQuality(quality); |
| 341 | paint.setShader(std::move(shader)); |
| 342 | surface->getCanvas()->drawPaint(paint); |
reed | 0955303 | 2015-11-23 12:32:16 -0800 | [diff] [blame] | 343 | return true; |
| 344 | } |
| 345 | |
reed | 183b57f | 2015-06-05 14:33:17 -0700 | [diff] [blame] | 346 | ////////////////////////////////////////////////////////////////////////////////////////////////// |
Hal Canary | 94e1a2f | 2016-10-31 09:38:12 -0400 | [diff] [blame] | 347 | |
| 348 | SkColor SkPixmap::getColor(int x, int y) const { |
| 349 | SkASSERT(this->addr()); |
| 350 | SkASSERT((unsigned)x < (unsigned)this->width()); |
| 351 | SkASSERT((unsigned)y < (unsigned)this->height()); |
Matt Sarett | 9466bf5 | 2017-06-09 09:54:55 -0400 | [diff] [blame] | 352 | |
Mike Klein | 29a49bd | 2018-09-17 21:04:20 +0000 | [diff] [blame] | 353 | const bool needsUnpremul = (kPremul_SkAlphaType == fInfo.alphaType()); |
| 354 | auto toColor = [needsUnpremul](uint32_t maybePremulColor) { |
| 355 | return needsUnpremul ? SkUnPreMultiply::PMColorToColor(maybePremulColor) |
| 356 | : SkSwizzle_BGRA_to_PMColor(maybePremulColor); |
| 357 | }; |
| 358 | |
| 359 | switch (this->colorType()) { |
| 360 | case kGray_8_SkColorType: { |
| 361 | uint8_t value = *this->addr8(x, y); |
| 362 | return SkColorSetRGB(value, value, value); |
| 363 | } |
| 364 | case kAlpha_8_SkColorType: { |
| 365 | return SkColorSetA(0, *this->addr8(x, y)); |
| 366 | } |
| 367 | case kRGB_565_SkColorType: { |
| 368 | return SkPixel16ToColor(*this->addr16(x, y)); |
| 369 | } |
| 370 | case kARGB_4444_SkColorType: { |
| 371 | uint16_t value = *this->addr16(x, y); |
| 372 | SkPMColor c = SkPixel4444ToPixel32(value); |
| 373 | return toColor(c); |
| 374 | } |
| 375 | case kRGB_888x_SkColorType: { |
| 376 | uint32_t value = *this->addr32(x, y); |
| 377 | return SkSwizzle_RB(value | 0xff000000); |
| 378 | } |
| 379 | case kBGRA_8888_SkColorType: { |
| 380 | uint32_t value = *this->addr32(x, y); |
| 381 | SkPMColor c = SkSwizzle_BGRA_to_PMColor(value); |
| 382 | return toColor(c); |
| 383 | } |
| 384 | case kRGBA_8888_SkColorType: { |
| 385 | uint32_t value = *this->addr32(x, y); |
| 386 | SkPMColor c = SkSwizzle_RGBA_to_PMColor(value); |
| 387 | return toColor(c); |
| 388 | } |
| 389 | case kRGB_101010x_SkColorType: { |
| 390 | uint32_t value = *this->addr32(x, y); |
| 391 | // Convert 10-bit rgb to 8-bit bgr, and mask in 0xff alpha at the top. |
| 392 | return (uint32_t)( ((value >> 0) & 0x3ff) * (255/1023.0f) ) << 16 |
| 393 | | (uint32_t)( ((value >> 10) & 0x3ff) * (255/1023.0f) ) << 8 |
| 394 | | (uint32_t)( ((value >> 20) & 0x3ff) * (255/1023.0f) ) << 0 |
| 395 | | 0xff000000; |
| 396 | } |
| 397 | case kRGBA_1010102_SkColorType: { |
| 398 | uint32_t value = *this->addr32(x, y); |
| 399 | |
| 400 | float r = ((value >> 0) & 0x3ff) * (1/1023.0f), |
| 401 | g = ((value >> 10) & 0x3ff) * (1/1023.0f), |
| 402 | b = ((value >> 20) & 0x3ff) * (1/1023.0f), |
| 403 | a = ((value >> 30) & 0x3 ) * (1/ 3.0f); |
| 404 | if (a != 0 && needsUnpremul) { |
| 405 | r *= (1.0f/a); |
| 406 | g *= (1.0f/a); |
| 407 | b *= (1.0f/a); |
| 408 | } |
| 409 | return (uint32_t)( r * 255.0f ) << 16 |
| 410 | | (uint32_t)( g * 255.0f ) << 8 |
| 411 | | (uint32_t)( b * 255.0f ) << 0 |
| 412 | | (uint32_t)( a * 255.0f ) << 24; |
| 413 | } |
| 414 | case kRGBA_F16_SkColorType: { |
| 415 | const uint64_t* addr = |
| 416 | (const uint64_t*)fPixels + y * (fRowBytes >> 3) + x; |
| 417 | Sk4f p4 = SkHalfToFloat_finite_ftz(*addr); |
| 418 | if (p4[3] && needsUnpremul) { |
| 419 | float inva = 1 / p4[3]; |
| 420 | p4 = p4 * Sk4f(inva, inva, inva, 1); |
| 421 | } |
| 422 | SkColor c; |
| 423 | SkNx_cast<uint8_t>(p4 * Sk4f(255) + Sk4f(0.5f)).store(&c); |
| 424 | // p4 is RGBA, but we want BGRA, so we need to swap next |
| 425 | return SkSwizzle_RB(c); |
| 426 | } |
| 427 | case kRGBA_F32_SkColorType: { |
| 428 | const float* rgba = |
| 429 | (const float*)fPixels + 4*y*(fRowBytes >> 4) + 4*x; |
| 430 | Sk4f p4 = Sk4f::Load(rgba); |
| 431 | // From here on, just like F16: |
| 432 | if (p4[3] && needsUnpremul) { |
| 433 | float inva = 1 / p4[3]; |
| 434 | p4 = p4 * Sk4f(inva, inva, inva, 1); |
| 435 | } |
| 436 | SkColor c; |
| 437 | SkNx_cast<uint8_t>(p4 * Sk4f(255) + Sk4f(0.5f)).store(&c); |
| 438 | // p4 is RGBA, but we want BGRA, so we need to swap next |
| 439 | return SkSwizzle_RB(c); |
| 440 | } |
| 441 | default: |
| 442 | SkDEBUGFAIL(""); |
| 443 | return SkColorSetARGB(0, 0, 0, 0); |
| 444 | } |
Hal Canary | 94e1a2f | 2016-10-31 09:38:12 -0400 | [diff] [blame] | 445 | } |
Hal Canary | 58a7694 | 2016-12-07 15:24:59 -0500 | [diff] [blame] | 446 | |
| 447 | bool SkPixmap::computeIsOpaque() const { |
| 448 | const int height = this->height(); |
| 449 | const int width = this->width(); |
| 450 | |
| 451 | switch (this->colorType()) { |
| 452 | case kAlpha_8_SkColorType: { |
| 453 | unsigned a = 0xFF; |
| 454 | for (int y = 0; y < height; ++y) { |
| 455 | const uint8_t* row = this->addr8(0, y); |
| 456 | for (int x = 0; x < width; ++x) { |
| 457 | a &= row[x]; |
| 458 | } |
| 459 | if (0xFF != a) { |
| 460 | return false; |
| 461 | } |
| 462 | } |
| 463 | return true; |
| 464 | } break; |
Hal Canary | 58a7694 | 2016-12-07 15:24:59 -0500 | [diff] [blame] | 465 | case kRGB_565_SkColorType: |
| 466 | case kGray_8_SkColorType: |
| 467 | return true; |
| 468 | break; |
| 469 | case kARGB_4444_SkColorType: { |
| 470 | unsigned c = 0xFFFF; |
| 471 | for (int y = 0; y < height; ++y) { |
| 472 | const SkPMColor16* row = this->addr16(0, y); |
| 473 | for (int x = 0; x < width; ++x) { |
| 474 | c &= row[x]; |
| 475 | } |
| 476 | if (0xF != SkGetPackedA4444(c)) { |
| 477 | return false; |
| 478 | } |
| 479 | } |
| 480 | return true; |
| 481 | } break; |
| 482 | case kBGRA_8888_SkColorType: |
| 483 | case kRGBA_8888_SkColorType: { |
| 484 | SkPMColor c = (SkPMColor)~0; |
| 485 | for (int y = 0; y < height; ++y) { |
| 486 | const SkPMColor* row = this->addr32(0, y); |
| 487 | for (int x = 0; x < width; ++x) { |
| 488 | c &= row[x]; |
| 489 | } |
| 490 | if (0xFF != SkGetPackedA32(c)) { |
| 491 | return false; |
| 492 | } |
| 493 | } |
| 494 | return true; |
| 495 | } |
| 496 | case kRGBA_F16_SkColorType: { |
| 497 | const SkHalf* row = (const SkHalf*)this->addr(); |
| 498 | for (int y = 0; y < height; ++y) { |
| 499 | for (int x = 0; x < width; ++x) { |
| 500 | if (row[4 * x + 3] < SK_Half1) { |
| 501 | return false; |
| 502 | } |
| 503 | } |
| 504 | row += this->rowBytes() >> 1; |
| 505 | } |
| 506 | return true; |
| 507 | } |
| 508 | default: |
| 509 | break; |
| 510 | } |
| 511 | return false; |
| 512 | } |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 513 | |
| 514 | ////////////////////////////////////////////////////////////////////////////////////////////////// |
| 515 | |
Mike Reed | 7306bcd | 2017-10-25 10:37:30 -0400 | [diff] [blame] | 516 | static bool draw_orientation(const SkPixmap& dst, const SkPixmap& src, unsigned flags) { |
| 517 | auto surf = SkSurface::MakeRasterDirect(dst.info(), dst.writable_addr(), dst.rowBytes()); |
| 518 | if (!surf) { |
| 519 | return false; |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 520 | } |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 521 | |
Mike Reed | 7306bcd | 2017-10-25 10:37:30 -0400 | [diff] [blame] | 522 | SkBitmap bm; |
| 523 | bm.installPixels(src); |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 524 | |
Mike Reed | 7306bcd | 2017-10-25 10:37:30 -0400 | [diff] [blame] | 525 | SkMatrix m; |
| 526 | m.setIdentity(); |
| 527 | |
| 528 | SkScalar W = SkIntToScalar(src.width()); |
| 529 | SkScalar H = SkIntToScalar(src.height()); |
| 530 | if (flags & SkPixmapPriv::kSwapXY) { |
| 531 | SkMatrix s; |
| 532 | s.setAll(0, 1, 0, 1, 0, 0, 0, 0, 1); |
| 533 | m.postConcat(s); |
Ben Wagner | f08d1d0 | 2018-06-18 15:11:00 -0400 | [diff] [blame] | 534 | using std::swap; |
| 535 | swap(W, H); |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 536 | } |
Mike Reed | 7306bcd | 2017-10-25 10:37:30 -0400 | [diff] [blame] | 537 | if (flags & SkPixmapPriv::kMirrorX) { |
| 538 | m.postScale(-1, 1); |
| 539 | m.postTranslate(W, 0); |
| 540 | } |
| 541 | if (flags & SkPixmapPriv::kMirrorY) { |
| 542 | m.postScale(1, -1); |
| 543 | m.postTranslate(0, H); |
| 544 | } |
| 545 | SkPaint p; |
| 546 | p.setBlendMode(SkBlendMode::kSrc); |
| 547 | surf->getCanvas()->concat(m); |
| 548 | surf->getCanvas()->drawBitmap(bm, 0, 0, &p); |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 549 | return true; |
| 550 | } |
| 551 | |
| 552 | bool SkPixmapPriv::Orient(const SkPixmap& dst, const SkPixmap& src, OrientFlags flags) { |
| 553 | SkASSERT((flags & ~(kMirrorX | kMirrorY | kSwapXY)) == 0); |
| 554 | if (src.colorType() != dst.colorType()) { |
| 555 | return false; |
| 556 | } |
| 557 | // note: we just ignore alphaType and colorSpace for this transformation |
| 558 | |
| 559 | int w = src.width(); |
| 560 | int h = src.height(); |
| 561 | if (flags & kSwapXY) { |
Ben Wagner | f08d1d0 | 2018-06-18 15:11:00 -0400 | [diff] [blame] | 562 | using std::swap; |
| 563 | swap(w, h); |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 564 | } |
| 565 | if (dst.width() != w || dst.height() != h) { |
| 566 | return false; |
| 567 | } |
| 568 | if (w == 0 || h == 0) { |
| 569 | return true; |
| 570 | } |
| 571 | |
| 572 | // check for aliasing to self |
| 573 | if (src.addr() == dst.addr()) { |
| 574 | return flags == 0; |
| 575 | } |
Mike Reed | 7306bcd | 2017-10-25 10:37:30 -0400 | [diff] [blame] | 576 | return draw_orientation(dst, src, flags); |
Mike Reed | 4379869 | 2017-10-17 18:04:32 +0000 | [diff] [blame] | 577 | } |
| 578 | |
Leon Scroggins III | 0cbc10f | 2017-10-30 09:07:53 -0400 | [diff] [blame] | 579 | #define kMirrorX SkPixmapPriv::kMirrorX |
| 580 | #define kMirrorY SkPixmapPriv::kMirrorY |
| 581 | #define kSwapXY SkPixmapPriv::kSwapXY |
| 582 | |
| 583 | static constexpr uint8_t gOrientationFlags[] = { |
| 584 | 0, // kTopLeft_SkEncodedOrigin |
| 585 | kMirrorX, // kTopRight_SkEncodedOrigin |
| 586 | kMirrorX | kMirrorY, // kBottomRight_SkEncodedOrigin |
| 587 | kMirrorY, // kBottomLeft_SkEncodedOrigin |
| 588 | kSwapXY, // kLeftTop_SkEncodedOrigin |
| 589 | kMirrorX | kSwapXY, // kRightTop_SkEncodedOrigin |
| 590 | kMirrorX | kMirrorY | kSwapXY, // kRightBottom_SkEncodedOrigin |
| 591 | kMirrorY | kSwapXY, // kLeftBottom_SkEncodedOrigin |
| 592 | }; |
| 593 | |
| 594 | SkPixmapPriv::OrientFlags SkPixmapPriv::OriginToOrient(SkEncodedOrigin o) { |
| 595 | unsigned io = static_cast<int>(o) - 1; |
| 596 | SkASSERT(io < SK_ARRAY_COUNT(gOrientationFlags)); |
| 597 | return static_cast<SkPixmapPriv::OrientFlags>(gOrientationFlags[io]); |
| 598 | } |
| 599 | |
| 600 | bool SkPixmapPriv::ShouldSwapWidthHeight(SkEncodedOrigin o) { |
| 601 | return SkToBool(OriginToOrient(o) & kSwapXY); |
| 602 | } |
| 603 | |
| 604 | SkImageInfo SkPixmapPriv::SwapWidthHeight(const SkImageInfo& info) { |
| 605 | return info.makeWH(info.height(), info.width()); |
| 606 | } |
| 607 | |