Index8 GPU and CPU raster support.

tests/Index8Test.cpp

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrContextFactory.h"
+#include "SkGr.h"
+#include "SkGrPriv.h"
+#include "SkConfig8888.h"
+#include "Test.h"
+
+#if SK_SUPPORT_GPU
+
+static void make_index8_bitmap(SkBitmap* result, int width, int height, int ccount, bool opaque) {
+    SkAutoMalloc storage(ccount * sizeof(SkPMColor));
+    SkPMColor* palette = static_cast<SkPMColor*>(storage.get());
+    for (int i = 0; i < ccount; ++i) {
+        palette[i] = SkPreMultiplyARGB(opaque ? 0xFF : i, 0xFF - i, i, 0xFF - i);
+    }
+    result->setInfo(SkImageInfo::Make(width, height, kIndex_8_SkColorType,
+                                      opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType));
+    SkAutoTUnref<SkColorTable> ctable(new SkColorTable(palette, ccount));
+    result->allocPixels(ctable);
+    for (int j = 0; j < height; ++j) {
+        uint8_t* scanline = result->getAddr8(0, j);
+        int c = (j * height);
+        for (int i = 0; i < width; ++i)
+            *scanline++ = ((c++) % ccount);
+    }
+    result->setImmutable();
+}
+
+static void compare_texture_with_bitmap(skiatest::Reporter* reporter, GrTexture* txa,
+                                        const SkBitmap& bm) {
+    SkAutoLockPixels alp(bm);
+    REPORTER_ASSERT(reporter, txa->width() == bm.width());
+    REPORTER_ASSERT(reporter, txa->height() == bm.height());
+    REPORTER_ASSERT(reporter, bm.colorType() == kN32_SkColorType);
+    SkAutoMalloc storage(bm.width() * bm.height() * sizeof(SkPMColor));
+    SkPMColor* pixels = static_cast<SkPMColor*>(storage.get());
+    REPORTER_ASSERT(reporter, txa->readPixels(0, 0, bm.width(), bm.height(), txa->config(),
+                                              pixels));
+
+    SkDstPixelInfo dstPI;
+    dstPI.fColorType = kN32_SkColorType;
+    dstPI.fAlphaType = bm.alphaType();
+    dstPI.fPixels = pixels;
+    dstPI.fRowBytes = bm.width() * sizeof(SkPMColor);
+
+    SkSrcPixelInfo srcPI;
+    memcpy(&srcPI, &dstPI, sizeof(SkSrcPixelInfo));
+    srcPI.fColorType = kRGBA_8888_SkColorType;
+
+    srcPI.convertPixelsTo(&dstPI, bm.width(), bm.height());
+
+    for (int j = 0; j < bm.height(); ++j) {
+        for (int i = 0; i < bm.width(); ++i) {
+            REPORTER_ASSERT(reporter, pixels[i + bm.width() * j] == *bm.getAddr32(i, j));
+        }
+    }
+}
+
+/*
+ *  Test two different ways to upload Index8 bitmap to texture.
+ */
+DEF_GPUTEST(Index8_Texture_Upload, reporter, factory) {
+    GrContext* ctx = factory->get(GrContextFactory::kNative_GLContextType);
+    if (!ctx) {
+        REPORTER_ASSERT(reporter, false);
+        return;
+    }
+
+    for (int opaque = 0; opaque < 2; ++opaque) {
+        SkBitmap bitmap;
+        make_index8_bitmap(&bitmap, 37, 39, 254, false);
+        SkBitmap bitmapN32;
+        bitmap.copyTo(&bitmapN32, kN32_SkColorType);
+
+        // make two textures...
+        SkAutoTUnref<GrTexture> i8tex(GrUploadBitmapToTexture(ctx, bitmap));
+        SkAutoTUnref<GrTexture> rgbatex(GrUploadBitmapToTexture(ctx, bitmapN32));
+
+        REPORTER_ASSERT(reporter, i8tex->width() == bitmap.width());
+        REPORTER_ASSERT(reporter, i8tex->height() == bitmap.height());
+
+        // Did we get the same?
+        compare_texture_with_bitmap(reporter, rgbatex, bitmapN32);
+        compare_texture_with_bitmap(reporter, i8tex, bitmapN32);
+    }
+}
+#endif