Progress on gamma-correctness in the GPU backend. Fixed conversion of color and profile type to pix…

tools/flags/SkCommonFlagsConfig.cpp

Index: tools/flags/SkCommonFlagsConfig.cpp
diff --git a/tools/flags/SkCommonFlagsConfig.cpp b/tools/flags/SkCommonFlagsConfig.cpp
index e2aa3270f2dd15ab681476f05cb3e71c45d7bd1b..4d9351c15ffede3b367d5c84a6753fce8b1212d5 100644
--- a/tools/flags/SkCommonFlagsConfig.cpp
+++ b/tools/flags/SkCommonFlagsConfig.cpp
@@ -23,7 +23,7 @@ static const char defaultConfigs[] =
 
 static const char configHelp[] =
     "Options: 565 8888 debug gpu gpudebug gpudft gpunull "
-    "msaa16 msaa4 nonrendering null nullgpu nvprmsaa16 nvprmsaa4 "
+    "msaa16 msaa4 gpuf16 gpusrgb nonrendering null nullgpu nvprmsaa16 nvprmsaa4 "
     "pdf pdf_poppler skp svg xps"
 #if SK_ANGLE
 #ifdef SK_BUILD_FOR_WIN
@@ -47,7 +47,7 @@ static const char configExtendedHelp[] =
     "Possible backends and options:\n"
 #if SK_SUPPORT_GPU
     "\n"
-    "gpu(api=string,dit=bool,nvpr=bool,samples=int)\tGPU backend\n"
+    "gpu(api=string,color=string,dit=bool,nvpr=bool,samples=int)\tGPU backend\n"
     "\tapi\ttype: string\tdefault: native.\n"
     "\t    Select graphics API to use with gpu backend.\n"
     "\t    Options:\n"
@@ -68,6 +68,12 @@ static const char configExtendedHelp[] =
 #if SK_MESA
     "\t\tmesa\t\t\tUse MESA.\n"
 #endif
+    "\tcolor\ttype: string\tdefault: 8888.\n"
+    "\t    Select framebuffer color format.\n"
+    "\t    Options:\n"
+    "\t\t8888\t\t\tLinear 8888.\n"
+    "\t\tf16 \t\t\tLinear 16-bit floating point.\n"
+    "\t\tsrgb\t\t\tsRGB 8888.\n"
     "\tdit\ttype: bool\tdefault: false.\n"
     "\t    Use device independent text.\n"
     "\tnvpr\ttype: bool\tdefault: false.\n"
@@ -81,6 +87,8 @@ static const char configExtendedHelp[] =
     "\tmsaa16   \t= gpu(samples=16)\n"
     "\tnvprmsaa4\t= gpu(nvpr=true,samples=4)\n"
     "\tnvprmsaa16\t= gpu(nvpr=true,samples=16)\n"
+    "\tgpuf16    \t= gpu(color=f16)\n"
+    "\tgpusrgb   \t= gpu(color=srgb)\n"
     "\tgpudft    \t= gpu(dit=true)\n"
     "\tgpudebug  \t= gpu(api=debug)\n"
     "\tgpunull   \t= gpu(api=null)\n"
@@ -114,6 +122,8 @@ static const struct {
     { "msaa16",     "gpu", "samples=16" },
     { "nvprmsaa4",  "gpu", "nvpr=true,samples=4,dit=true" },
     { "nvprmsaa16", "gpu", "nvpr=true,samples=16,dit=true" },
+    { "gpuf16",     "gpu", "color=f16" },
+    { "gpusrgb",    "gpu", "color=srgb" },
     { "gpudft",     "gpu", "dit=true" },
     { "gpudebug",   "gpu", "api=debug" },
     { "gpunull",    "gpu", "api=null" },
@@ -148,12 +158,15 @@ SkCommandLineConfig::~SkCommandLineConfig() {
 #if SK_SUPPORT_GPU
 SkCommandLineConfigGpu::SkCommandLineConfigGpu(
     const SkString& tag, const SkTArray<SkString>& viaParts,
-    ContextType contextType, bool useNVPR, bool useDIText, int samples)
+    ContextType contextType, bool useNVPR, bool useDIText, int samples,
+    SkColorType colorType, SkColorProfileType profileType)
         : SkCommandLineConfig(tag, SkString("gpu"), viaParts)
         , fContextType(contextType)
         , fUseNVPR(useNVPR)
         , fUseDIText(useDIText)
-        , fSamples(samples) {
+        , fSamples(samples)
+        , fColorType(colorType)
+        , fProfileType(profileType) {
 }
 static bool parse_option_int(const SkString& value, int* outInt) {
     if (value.isEmpty()) {
@@ -226,6 +239,26 @@ static bool parse_option_gpu_api(const SkString& value,
 #endif
     return false;
 }
+static bool parse_option_gpu_color(const SkString& value,
+                                   SkColorType* outColorType,
+                                   SkColorProfileType* outProfileType) {
+    if (value.equals("8888")) {
+        *outColorType = kN32_SkColorType;
+        *outProfileType = kLinear_SkColorProfileType;
+        return true;
+    }
+    if (value.equals("f16")) {
+        *outColorType = kRGBA_F16_SkColorType;
+        *outProfileType = kLinear_SkColorProfileType;
+        return true;
+    }
+    if (value.equals("srgb")) {
+        *outColorType = kN32_SkColorType;
+        *outProfileType = kSRGB_SkColorProfileType;
+        return true;
+    }
+    return false;
+}
 
 SkCommandLineConfigGpu* parse_command_line_config_gpu(const SkString& tag,
                                                       const SkTArray<SkString>& vias,
@@ -239,6 +272,9 @@ SkCommandLineConfigGpu* parse_command_line_config_gpu(const SkString& tag,
     bool useDIText = false;
     bool seenSamples = false;
     int samples = 0;
+    bool seenColor = false;
+    SkColorType colorType = kN32_SkColorType;
+    SkColorProfileType profileType = kLinear_SkColorProfileType;
 
     SkTArray<SkString> optionParts;
     SkStrSplit(options.c_str(), ",", kStrict_SkStrSplitMode, &optionParts);
@@ -263,12 +299,16 @@ SkCommandLineConfigGpu* parse_command_line_config_gpu(const SkString& tag,
         } else if (key.equals("samples") && !seenSamples) {
             valueOk = parse_option_int(value, &samples);
             seenSamples = true;
+        } else if (key.equals("color") && !seenColor) {
+            valueOk = parse_option_gpu_color(value, &colorType, &profileType);
+            seenColor = true;
         }
         if (!valueOk) {
             return nullptr;
         }
     }
-    return new SkCommandLineConfigGpu(tag, vias, contextType, useNVPR, useDIText, samples);
+    return new SkCommandLineConfigGpu(tag, vias, contextType, useNVPR, useDIText, samples,
+                                      colorType, profileType);
 }
 #endif