blob: cbd8c9df866a420218a1512c1f7f0bc301a30f90 [file] [log] [blame]
/*
* Copyright 2021 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkCanvas.h"
#include "include/core/SkColorSpace.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkSurface.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/GrRecordingContext.h"
#include "src/core/SkAutoPixmapStorage.h"
#include "tests/Test.h"
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(crbug_1271431, reporter, context_info) {
GrDirectContext* dc = context_info.directContext();
// Make sure we don't get recycled render targets that already have stencil attachments.
dc->freeGpuResources();
SkImageInfo ii = SkImageInfo::Make({100, 100},
kRGBA_8888_SkColorType,
kPremul_SkAlphaType,
nullptr);
sk_sp<SkSurface> surfs[2] {
SkSurface::MakeRenderTarget(dc, SkBudgeted::kYes, ii, 1, nullptr),
SkSurface::MakeRenderTarget(dc, SkBudgeted::kYes, ii, 1, nullptr)
};
// Make sure the surfaces' proxies are instantiated without stencil. Creating textures lazily
// can invalidate the current tracked FBO since FBO state must be modified to during
// GrGLRenderTarget creation.
for (int i = 0; i < 2; ++i) {
surfs[i]->getCanvas()->clear(SK_ColorWHITE);
surfs[i]->flushAndSubmit();
}
auto drawWithStencilClip = [&](SkSurface& surf, SkColor color) {
SkPath clip;
clip.addCircle(50, 50, 50);
clip.addCircle(50, 50, 10, SkPathDirection::kCCW);
SkPaint paint;
paint.setColor(color);
surf.getCanvas()->clipPath(clip, false);
surf.getCanvas()->drawRect(SkRect::MakeLTRB(0,0, 100, 100), paint);
};
// Use surfs[0] create to create a cached stencil buffer that is also sized for surfs[1].
drawWithStencilClip(*surfs[0], SK_ColorRED);
surfs[0]->flushAndSubmit();
// Make sure surf[1]'s FBO is bound but without using draws that would attach stencil.
surfs[1]->getCanvas()->clear(SK_ColorGREEN);
surfs[1]->flushAndSubmit();
// Now use stencil for clipping. We should now have the following properties:
// 1) surf[1]'s FBO is already bound
// 2) surf[1] doesn't have a stencil buffer
// 3) There is an appropriately sized stencil buffer in the cache (used with surf[0]). This is
// important because creating a new stencil buffer will invalidate the bound FBO tracking.
// The bug was that because the correct FBO was already bound we would not rebind and would
// skip the lazy stencil attachment in GrGLRenderTarget. This would cause the clip to fail.
drawWithStencilClip(*surfs[1], SK_ColorBLUE);
// Check that four pixels that should have been clipped out of the blue draw are green.
SkAutoPixmapStorage rb;
rb.alloc(surfs[1]->imageInfo().makeWH(1, 1));
for (int x : {5, 95}) {
for (int y : {5, 95}) {
if (!surfs[1]->readPixels(rb, x, y)) {
ERRORF(reporter, "readback failed");
return;
}
if (*rb.addr32() != SK_ColorGREEN) {
ERRORF(reporter,
"Expected green at (%d, %d), instead got 0x%08x.",
x,
y,
*rb.addr32());
return;
}
}
}
}