Store mipmap levels in deferred texture image

gm/deferredtextureimagedata.cpp

-/*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#include <vector>
-
-#include "gm.h"
-#include "GrContext.h"
-#include "Resources.h"
-#include "SkImage.h"
-
-#if SK_SUPPORT_GPU
-
-// Helper function that uploads the given SkImage using MakdeFromDeferredTextureImageData and then
-// draws the uploaded version at the specified coordinates.
-static bool DrawDeferredTextureImageData(GrContext* context, SkCanvas* canvas, SkImage* image,
-                                         SkImage::DeferredTextureImageUsageParams* params,
-                                         SkScalar x, SkScalar y) {
-    SkAutoTUnref<GrContextThreadSafeProxy> proxy(context->threadSafeProxy());
-    size_t deferredSize =  image->getDeferredTextureImageData(*proxy, params, 1, nullptr);
-    if (deferredSize == 0) {
-        SkDebugf("\nCould not create DeferredTextureImageData.\n");
-        return false;
-    }
-
-    std::vector<uint8_t> memory;
-    memory.resize(deferredSize);
-    image->getDeferredTextureImageData(*proxy, params, 1, memory.data());
-    sk_sp<SkImage> uploadedImage =
-        SkImage::MakeFromDeferredTextureImageData(context, memory.data(), SkBudgeted::kNo);
-    canvas->drawImage(uploadedImage, x, y);
-
-  return true;
-}
-
-DEF_SIMPLE_GM(deferred_texture_image_data, canvas, 60, 10) {
-    GrContext* context = canvas->getGrContext();
-    if (!context) {
-        skiagm::GM::DrawGpuOnlyMessage(canvas);
-        return;
-    }
-
-    sk_sp<SkImage> encodedImage = GetResourceAsImage("randPixels.png");
-    if (!encodedImage) {
-        SkDebugf("\nCould not load resource.\n");
-        return;
-    }
-
-    SkBitmap bitmap;
-    if (!GetResourceAsBitmap("randPixels.png", &bitmap)) {
-        SkDebugf("\nCould not decode resource.\n");
-        return;
-    }
-
-    sk_sp<SkImage> decodedImage = SkImage::MakeFromBitmap(bitmap);
-
-    // Draw both encoded and decoded image via deferredTextureImageData.
-    SkImage::DeferredTextureImageUsageParams params;
-    DrawDeferredTextureImageData(context, canvas, encodedImage.get(), &params, 0, 0);
-    DrawDeferredTextureImageData(context, canvas, decodedImage.get(), &params, 10, 0);
-
-    // Draw 50% scaled versions of the encoded and decoded images at medium quality.
-    SkImage::DeferredTextureImageUsageParams mediumScaledParams;
-    mediumScaledParams.fPreScaleMipLevel = 1;
-    mediumScaledParams.fQuality = kMedium_SkFilterQuality;
-
-    DrawDeferredTextureImageData(context, canvas, encodedImage.get(), &mediumScaledParams, 20, 0);
-    DrawDeferredTextureImageData(context, canvas, decodedImage.get(), &mediumScaledParams, 30, 0);
-
-    // Draw 50% scaled versions of the encoded and decoded images at none quality.
-    SkImage::DeferredTextureImageUsageParams noneScaledParams;
-    noneScaledParams.fPreScaleMipLevel = 1;
-    noneScaledParams.fQuality = kNone_SkFilterQuality;
-
-    DrawDeferredTextureImageData(context, canvas, encodedImage.get(), &noneScaledParams, 40, 0);
-    DrawDeferredTextureImageData(context, canvas, decodedImage.get(), &noneScaledParams, 50, 0);
-}
-
-#endif