remove colorprofiletype from imageinfo

src/core/SkImageInfo.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImageInfo.h"
 #include "SkImageInfoPriv.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
 
+/*
+ *  We store this as a byte in the ImageInfo flatten buffer.
+ */
+enum class SkFlattenColorSpaceEnum {
+    kUnspecified,
+    kSRGB,
+    kAdobe1998,
+    // ... add more here
+    kLastEnum = kAdobe1998,
+    // final value means the actual profile data follows the info
+    kICCProfile = 0xFF,
+};
+
+static sk_sp<SkColorSpace> make_from_enum(SkFlattenColorSpaceEnum value) {
+    switch (value) {
+        case SkFlattenColorSpaceEnum::kSRGB:
+            return SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
+        case SkFlattenColorSpaceEnum::kAdobe1998:
+            return SkColorSpace::NewNamed(SkColorSpace::kAdobeRGB_Named);
+        default:
+            return nullptr;
+    }
+}
+
+SkColorSpace::Named sk_deduce_named_from_colorspace(SkColorSpace* cs) {
+    return cs->fNamed;
+}
+
+static SkFlattenColorSpaceEnum deduce_from_colorspace(SkColorSpace* cs) {
+    if (!cs) {
+        return SkFlattenColorSpaceEnum::kUnspecified;
+    }
+    switch (sk_deduce_named_from_colorspace(cs)) {
+        case SkColorSpace::kSRGB_Named:
+            return SkFlattenColorSpaceEnum::kSRGB;
+        case SkColorSpace::kAdobeRGB_Named:
+            return SkFlattenColorSpaceEnum::kAdobe1998;
+        default:
+            return SkFlattenColorSpaceEnum::kICCProfile;
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifdef SK_SUPPORT_LEGACY_COLORPROFILETYPE
+SkColorProfileType SkImageInfo::profileType() const {
+    return fColorSpace && fColorSpace->gammaCloseToSRGB()
+            ? kSRGB_SkColorProfileType : kLinear_SkColorProfileType;
+}
+#endif
+
 // Indicate how images and gradients should interpret colors by default.
 bool gDefaultProfileIsSRGB;
 
 SkColorProfileType SkDefaultColorProfile() {
     return gDefaultProfileIsSRGB ? kSRGB_SkColorProfileType
                                  : kLinear_SkColorProfileType;
 }
 
-static bool profile_type_is_valid(SkColorProfileType profileType) {
-    return (profileType >= 0) && (profileType <= kLastEnum_SkColorProfileType);
-}
-
 static bool alpha_type_is_valid(SkAlphaType alphaType) {
     return (alphaType >= 0) && (alphaType <= kLastEnum_SkAlphaType);
 }
 
 static bool color_type_is_valid(SkColorType colorType) {
     return (colorType >= 0) && (colorType <= kLastEnum_SkColorType);
 }
 
-SkImageInfo SkImageInfo::Make(int width, int height, SkColorType ct, SkAlphaType at,
-                              sk_sp<SkColorSpace> cs) {
-    SkColorProfileType pt = SkDefaultColorProfile();
-    // try to keep the enum and the colorspace in sync.
-    // TODO: eliminate the enum entirely, now that we have colorspace objects
-    if (cs && (SkColorSpace::kLinear_GammaNamed != cs->gammaNamed())) {
-        pt = kSRGB_SkColorProfileType;
-    }
-    return SkImageInfo(width, height, ct, at, pt, std::move(cs));
-}
-
 SkImageInfo SkImageInfo::MakeS32(int width, int height, SkAlphaType at) {
-    return SkImageInfo(width, height, kN32_SkColorType, at, kSRGB_SkColorProfileType,
+    return SkImageInfo(width, height, kN32_SkColorType, at,
                        SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named));
 }
 
 void SkImageInfo::unflatten(SkReadBuffer& buffer) {
     fWidth = buffer.read32();
     fHeight = buffer.read32();
 
     uint32_t packed = buffer.read32();
     SkASSERT(0 == (packed >> 24));
-    fProfileType = (SkColorProfileType)((packed >> 16) & 0xFF);
+    fColorType = (SkColorType)((packed >> 0) & 0xFF);
     fAlphaType = (SkAlphaType)((packed >> 8) & 0xFF);
-    fColorType = (SkColorType)((packed >> 0) & 0xFF);
-    buffer.validate(profile_type_is_valid(fProfileType) &&
-                    alpha_type_is_valid(fAlphaType) &&
-                    color_type_is_valid(fColorType));
+    SkFlattenColorSpaceEnum csenum = (SkFlattenColorSpaceEnum)((packed >> 16) & 0xFF);
+    buffer.validate(alpha_type_is_valid(fAlphaType) && color_type_is_valid(fColorType));
+
+    if (SkFlattenColorSpaceEnum::kICCProfile == csenum) {
+        SkASSERT(false);    // we shouldn't hit this yet, as we don't write these yet
+        fColorSpace.reset();
+    } else {
+        if (csenum > SkFlattenColorSpaceEnum::kLastEnum) {
+            csenum = SkFlattenColorSpaceEnum::kUnspecified;
+        }
+        fColorSpace = make_from_enum(csenum);
+    }
 }
 
 void SkImageInfo::flatten(SkWriteBuffer& buffer) const {
     buffer.write32(fWidth);
     buffer.write32(fHeight);
 
-    SkASSERT(0 == (fProfileType & ~0xFF));
+    SkFlattenColorSpaceEnum csenum = deduce_from_colorspace(fColorSpace.get());
+
+    // TODO: when we actually support flattening the colorspace to a profile blob, remove this
+    //       hack (and write the blob after we write packed.
+    if (SkFlattenColorSpaceEnum::kICCProfile == csenum) {
+        csenum = SkFlattenColorSpaceEnum::kUnspecified;
+    }
+
+    SkASSERT(0 == ((int)csenum & ~0xFF));
     SkASSERT(0 == (fAlphaType & ~0xFF));
     SkASSERT(0 == (fColorType & ~0xFF));
-    uint32_t packed = (fProfileType << 16) | (fAlphaType << 8) | fColorType;
+    uint32_t packed = ((int)csenum << 16) | (fAlphaType << 8) | fColorType;
     buffer.write32(packed);
+
+    if (SkFlattenColorSpaceEnum::kICCProfile == csenum) {
+        // TODO: write the ICCProfile blob
+    }
 }
 
 bool SkColorTypeValidateAlphaType(SkColorType colorType, SkAlphaType alphaType,
                                   SkAlphaType* canonical) {
     switch (colorType) {
         case kUnknown_SkColorType:
             alphaType = kUnknown_SkAlphaType;
             break;
         case kAlpha_8_SkColorType:
             if (kUnpremul_SkAlphaType == alphaType) {
@@ skipping 57 matching lines @@
     }
     // here x,y are either 0 or negative
     fPixels = ((char*)fPixels - y * fRowBytes - x * fInfo.bytesPerPixel());
     // the intersect may have shrunk info's logical size
     fInfo = fInfo.makeWH(srcR.width(), srcR.height());
     fX = srcR.x();
     fY = srcR.y();
 
     return true;
 }