Remove color space restrictions from image infos

What makes an info valid (or invalid)? Nothing to do with
color space.

Bug: skia:
Change-Id: I6795efa9aa74ab0d65935c5ddccc1058f8e0b112
Reviewed-on: https://skia-review.googlesource.com/131780
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>

include/private/SkImageInfoPriv.h

@@ -88,10 +88,9 @@ static inline size_t SkColorTypeComputeOffset(SkColorType ct, int x, int y, size
 }
 
 /**
- *  This contains shared checks on SkImageInfo.  Depending on the desired color space behavior,
- *  the caller should choose one of the two versions below.
+ *  Returns true if |info| contains a valid combination of width, height, colorType, and alphaType.
  */
-static inline bool SkImageInfoIsValidCommon(const SkImageInfo& info) {
+static inline bool SkImageInfoIsValid(const SkImageInfo& info) {
     if (info.width() <= 0 || info.height() <= 0) {
         return false;
     }
@@ -113,53 +112,9 @@ static inline bool SkImageInfoIsValidCommon(const SkImageInfo& info) {
     return true;
 }
 
-/**
- *  Returns true if |info| contains a valid combination of width, height, colorType, alphaType,
- *  colorSpace.  Allows numerical color spaces.  Returns false otherwise.
- */
-static inline bool SkImageInfoIsValidAllowNumericalCS(const SkImageInfo& info) {
-    if (!SkImageInfoIsValidCommon(info)) {
-        return false;
-    }
-
-    SkColorSpaceTransferFn fn;
-    if (info.colorSpace() && !info.colorSpace()->isNumericalTransferFn(&fn)) {
-        return false;
-    }
-
-    return true;
-}
-
-/**
- *  Returns true if |info| contains a valid combination of width, height, colorType, alphaType,
- *  colorSpace.  Only supports rendering color spaces.  Returns false otherwise.
- */
-static inline bool SkImageInfoIsValidRenderingCS(const SkImageInfo& info) {
-    if (!SkImageInfoIsValidCommon(info)) {
-        return false;
-    }
-
-    if (info.colorSpace() &&
-       (!info.colorSpace()->gammaCloseToSRGB() && !info.colorSpace()->gammaIsLinear())) {
-        return false;
-    }
-
-    return true;
-}
-
-/**
- *  Returns true if |info| contains a valid combination of width, height, colorType, alphaType,
- *  colorSpace.
- */
-static inline bool SkImageInfoIsValid(const SkImageInfo& info) {
-    return SkImageInfoIsValidAllowNumericalCS(info);
-}
-
 /**
  *  Returns true if Skia has defined a pixel conversion from the |src| to the |dst|.
  *  Returns false otherwise.  Some discussion of false cases:
- *      We will not convert to kIndex8 unless it exactly matches the src, since color tables
- *      are immutable.
  *      We do not convert to kGray8 when the |src| is not kGray8 in the same color space.
  *      We may add this feature - it just requires some work to convert to luminance while
  *      handling color spaces correctly.  Currently no one is asking for this.
@@ -174,7 +129,7 @@ static inline bool SkImageInfoIsValid(const SkImageInfo& info) {
  *      conversion is not well-defined.
  */
 static inline bool SkImageInfoValidConversion(const SkImageInfo& dst, const SkImageInfo& src) {
-    if (!SkImageInfoIsValidAllowNumericalCS(dst) || !SkImageInfoIsValidAllowNumericalCS(src)) {
+    if (!SkImageInfoIsValid(dst) || !SkImageInfoIsValid(src)) {
         return false;
     }
 

src/image/SkImage_Gpu.cpp

@@ -329,7 +329,7 @@ bool validate_backend_texture(GrContext* ctx, const GrBackendTexture& tex, GrPix
     // TODO: Create a SkImageColorInfo struct for color, alpha, and color space so we don't need to
     // create a fake image info here.
     SkImageInfo info = SkImageInfo::Make(1, 1, ct, at, cs);
-    if (!SkImageInfoIsValidAllowNumericalCS(info)) {
+    if (!SkImageInfoIsValid(info)) {
         return false;
     }
 
@@ -697,7 +697,7 @@ sk_sp<SkImage> SkImage_Gpu::MakePromiseTexture(GrContext* context,
     }
 
     SkImageInfo info = SkImageInfo::Make(width, height, colorType, alphaType, colorSpace);
-    if (!SkImageInfoIsValidAllowNumericalCS(info)) {
+    if (!SkImageInfoIsValid(info)) {
         return nullptr;
     }
     GrPixelConfig config = kUnknown_GrPixelConfig;

src/image/SkImage_Raster.cpp

@@ -315,7 +315,7 @@ sk_sp<SkImage> SkMakeImageFromRasterBitmapPriv(const SkBitmap& bm, SkCopyPixelsM
 }
 
 sk_sp<SkImage> SkMakeImageFromRasterBitmap(const SkBitmap& bm, SkCopyPixelsMode cpm) {
-    if (!SkImageInfoIsValidAllowNumericalCS(bm.info()) || bm.rowBytes() < bm.info().minRowBytes()) {
+    if (!SkImageInfoIsValid(bm.info()) || bm.rowBytes() < bm.info().minRowBytes()) {
         return nullptr;
     }
 

src/image/SkSurface_Raster.cpp

@@ -38,10 +38,7 @@ private:
 ///////////////////////////////////////////////////////////////////////////////
 
 bool SkSurfaceValidateRasterInfo(const SkImageInfo& info, size_t rowBytes) {
-    if (!SkImageInfoIsValidCommon(info)) {
-        return false;
-    }
-    if (info.isEmpty()) {
+    if (!SkImageInfoIsValid(info)) {
         return false;
     }
 

src/images/SkImageEncoderPriv.h

@@ -11,17 +11,9 @@
 #include "SkImageEncoder.h"
 #include "SkImageInfoPriv.h"
 
-static inline bool SkPixmapIsValid(const SkPixmap& src,
-                                   SkTransferFunctionBehavior unpremulBehavior)
-{
-    if (SkTransferFunctionBehavior::kRespect == unpremulBehavior) {
-        if (!SkImageInfoIsValidRenderingCS(src.info())) {
-            return false;
-        }
-    } else {
-        if (!SkImageInfoIsValidAllowNumericalCS(src.info())) {
-            return false;
-        }
+static inline bool SkPixmapIsValid(const SkPixmap& src) {
+    if (!SkImageInfoIsValid(src.info())) {
+        return false;
     }
 
     if (!src.addr() || src.rowBytes() < src.info().minRowBytes()) {

src/images/SkJpegEncoder.cpp

@@ -181,7 +181,7 @@ bool SkJpegEncoderMgr::setParams(const SkImageInfo& srcInfo, const SkJpegEncoder
 
 std::unique_ptr<SkEncoder> SkJpegEncoder::Make(SkWStream* dst, const SkPixmap& src,
                                                const Options& options) {
-    if (!SkPixmapIsValid(src, options.fBlendBehavior)) {
+    if (!SkPixmapIsValid(src)) {
         return nullptr;
     }
 

src/images/SkPngEncoder.cpp

@@ -364,7 +364,7 @@ void SkPngEncoderMgr::chooseProc(const SkImageInfo& srcInfo,
 
 std::unique_ptr<SkEncoder> SkPngEncoder::Make(SkWStream* dst, const SkPixmap& src,
                                               const Options& options) {
-    if (!SkPixmapIsValid(src, options.fUnpremulBehavior)) {
+    if (!SkPixmapIsValid(src)) {
         return nullptr;
     }
 

src/images/SkWebpEncoder.cpp

@@ -109,7 +109,7 @@ static int stream_writer(const uint8_t* data, size_t data_size,
 }
 
 bool SkWebpEncoder::Encode(SkWStream* stream, const SkPixmap& pixmap, const Options& opts) {
-    if (!SkPixmapIsValid(pixmap, opts.fUnpremulBehavior)) {
+    if (!SkPixmapIsValid(pixmap)) {
         return false;
     }
 

tests/ReadPixelsTest.cpp

@@ -610,7 +610,7 @@ static const void* five_reference_pixels(SkColorType colorType) {
 
 static void test_conversion(skiatest::Reporter* r, const SkImageInfo& dstInfo,
                             const SkImageInfo& srcInfo) {
-    if (!SkImageInfoIsValidRenderingCS(srcInfo)) {
+    if (!SkImageInfoIsValid(srcInfo)) {
         return;
     }