replace SkBitmap::Config with SkColorType in gms

add helper installMaskPixels() to SkBitmap

BUG=skia:
R=halcanary@google.com

Author: reed@google.com

Review URL: https://codereview.chromium.org/169913003

git-svn-id: http://skia.googlecode.com/svn/trunk@13482 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/tilemodes.cpp b/gm/tilemodes.cpp
index 0b0a3ae..5b97f13 100644
--- a/gm/tilemodes.cpp
+++ b/gm/tilemodes.cpp
@@ -19,8 +19,8 @@
 #include "SkUnitMappers.h"
 #include "SkBlurDrawLooper.h"
 
-static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
-    bm->allocConfigPixels(config, w, h);
+static void makebm(SkBitmap* bm, SkColorType ct, int w, int h) {
+    bm->allocPixels(SkImageInfo::Make(w, h, ct, kPremul_SkAlphaType));
     bm->eraseColor(SK_ColorTRANSPARENT);
 
     SkCanvas    canvas(*bm);
@@ -49,9 +49,9 @@
     paint->setFilterLevel(filter ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
 }
 
-static const SkBitmap::Config gConfigs[] = {
-    SkBitmap::kARGB_8888_Config,
-    SkBitmap::kRGB_565_Config,
+static const SkColorType gColorTypes[] = {
+    kPMColor_SkColorType,
+    kRGB_565_SkColorType,
 };
 
 class TilingGM : public skiagm::GM {
@@ -60,7 +60,7 @@
             : fPowerOfTwoSize(powerOfTwoSize) {
     }
 
-    SkBitmap    fTexture[SK_ARRAY_COUNT(gConfigs)];
+    SkBitmap    fTexture[SK_ARRAY_COUNT(gColorTypes)];
 
 protected:
 
@@ -81,8 +81,8 @@
 
     virtual void onOnceBeforeDraw() SK_OVERRIDE {
         int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
-        for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
-            makebm(&fTexture[i], gConfigs[i], size, size);
+        for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
+            makebm(&fTexture[i], gColorTypes[i], size, size);
         }
     }
 
@@ -120,7 +120,7 @@
 
         y += SkIntToScalar(16);
 
-        for (size_t i = 0; i < SK_ARRAY_COUNT(gConfigs); i++) {
+        for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
             for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
                 x = SkIntToScalar(10);
                 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
@@ -129,7 +129,7 @@
 #if 1 // Temporary change to regen bitmap before each draw. This may help tracking down an issue
       // on SGX where resizing NPOT textures to POT textures exhibits a driver bug.
                         if (!fPowerOfTwoSize) {
-                            makebm(&fTexture[i], gConfigs[i], size, size);
+                            makebm(&fTexture[i], gColorTypes[i], size, size);
                         }
 #endif
                         setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
@@ -166,7 +166,7 @@
 
 static SkShader* make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
     SkBitmap bm;
-    makebm(&bm, SkBitmap::kARGB_8888_Config, gWidth, gHeight);
+    makebm(&bm, kPMColor_SkColorType, gWidth, gHeight);
     return SkShader::CreateBitmapShader(bm, tx, ty);
 }