Ensure that textures exported via SkImage::MakeBackendTextureFromSkImage

have consistent content in their mip map levels.

Bug= chromium:850617

Change-Id: I3ad918aa453bd8e4e625eb145de6ba2a5dab7b0c
Reviewed-on: https://skia-review.googlesource.com/136230
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/gpu/GrGpu.cpp b/src/gpu/GrGpu.cpp
index 3ebfa364d4..4b7e786f87 100644
--- a/src/gpu/GrGpu.cpp
+++ b/src/gpu/GrGpu.cpp
@@ -291,6 +291,19 @@ bool GrGpu::transferPixels(GrTexture* texture, int left, int top, int width, int
     return false;
 }
 
+bool GrGpu::regenerateMipMapLevels(GrTexture* texture) {
+    SkASSERT(texture);
+    SkASSERT(this->caps()->mipMapSupport());
+    SkASSERT(texture->texturePriv().mipMapped() == GrMipMapped::kYes);
+    SkASSERT(texture->texturePriv().mipMapsAreDirty());
+    SkASSERT(!texture->asRenderTarget() || !texture->asRenderTarget()->needsResolve());
+    if (this->onRegenerateMipMapLevels(texture)) {
+        texture->texturePriv().markMipMapsClean();
+        return true;
+    }
+    return false;
+}
+
 void GrGpu::resolveRenderTarget(GrRenderTarget* target) {
     SkASSERT(target);
     this->handleDirtyContext();