| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkCanvas.h" |
| #include "SkColorPriv.h" |
| #include "SkMathPriv.h" |
| #include "SkSurface.h" |
| #include "Test.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "GrContext.h" |
| #include "SkGr.h" |
| #endif |
| |
| #include <initializer_list> |
| |
| static const int DEV_W = 100, DEV_H = 100; |
| static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H); |
| static const SkRect DEV_RECT_S = SkRect::MakeWH(DEV_W * SK_Scalar1, |
| DEV_H * SK_Scalar1); |
| |
| static SkPMColor get_src_color(int x, int y) { |
| SkASSERT(x >= 0 && x < DEV_W); |
| SkASSERT(y >= 0 && y < DEV_H); |
| |
| U8CPU r = x; |
| U8CPU g = y; |
| U8CPU b = 0xc; |
| |
| U8CPU a = 0xff; |
| switch ((x+y) % 5) { |
| case 0: |
| a = 0xff; |
| break; |
| case 1: |
| a = 0x80; |
| break; |
| case 2: |
| a = 0xCC; |
| break; |
| case 4: |
| a = 0x01; |
| break; |
| case 3: |
| a = 0x00; |
| break; |
| } |
| return SkPremultiplyARGBInline(a, r, g, b); |
| } |
| |
| static SkPMColor get_dst_bmp_init_color(int x, int y, int w) { |
| int n = y * w + x; |
| |
| U8CPU b = n & 0xff; |
| U8CPU g = (n >> 8) & 0xff; |
| U8CPU r = (n >> 16) & 0xff; |
| return SkPackARGB32(0xff, r, g , b); |
| } |
| |
| static SkPMColor convert_to_pmcolor(SkColorType ct, SkAlphaType at, const uint32_t* addr, |
| bool* doUnpremul) { |
| *doUnpremul = (kUnpremul_SkAlphaType == at); |
| |
| const uint8_t* c = reinterpret_cast<const uint8_t*>(addr); |
| U8CPU a,r,g,b; |
| switch (ct) { |
| case kBGRA_8888_SkColorType: |
| b = static_cast<U8CPU>(c[0]); |
| g = static_cast<U8CPU>(c[1]); |
| r = static_cast<U8CPU>(c[2]); |
| a = static_cast<U8CPU>(c[3]); |
| break; |
| case kRGBA_8888_SkColorType: |
| r = static_cast<U8CPU>(c[0]); |
| g = static_cast<U8CPU>(c[1]); |
| b = static_cast<U8CPU>(c[2]); |
| a = static_cast<U8CPU>(c[3]); |
| break; |
| default: |
| SkDEBUGFAIL("Unexpected colortype"); |
| return 0; |
| } |
| |
| if (*doUnpremul) { |
| r = SkMulDiv255Ceiling(r, a); |
| g = SkMulDiv255Ceiling(g, a); |
| b = SkMulDiv255Ceiling(b, a); |
| } |
| return SkPackARGB32(a, r, g, b); |
| } |
| |
| static SkBitmap make_src_bitmap() { |
| static SkBitmap bmp; |
| if (bmp.isNull()) { |
| bmp.allocN32Pixels(DEV_W, DEV_H); |
| intptr_t pixels = reinterpret_cast<intptr_t>(bmp.getPixels()); |
| for (int y = 0; y < DEV_H; ++y) { |
| for (int x = 0; x < DEV_W; ++x) { |
| SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bmp.rowBytes() + x * bmp.bytesPerPixel()); |
| *pixel = get_src_color(x, y); |
| } |
| } |
| } |
| return bmp; |
| } |
| |
| static void fill_src_canvas(SkCanvas* canvas) { |
| canvas->save(); |
| canvas->setMatrix(SkMatrix::I()); |
| canvas->clipRect(DEV_RECT_S, SkCanvas::kReplace_Op); |
| SkPaint paint; |
| paint.setBlendMode(SkBlendMode::kSrc); |
| canvas->drawBitmap(make_src_bitmap(), 0, 0, &paint); |
| canvas->restore(); |
| } |
| |
| #if SK_SUPPORT_GPU |
| static void fill_src_texture(GrTexture* texture) { |
| SkBitmap bmp = make_src_bitmap(); |
| bmp.lockPixels(); |
| texture->writePixels(0, 0, DEV_W, DEV_H, kSkia8888_GrPixelConfig, bmp.getPixels(), |
| bmp.rowBytes()); |
| bmp.unlockPixels(); |
| } |
| #endif |
| |
| static void fill_dst_bmp_with_init_data(SkBitmap* bitmap) { |
| SkAutoLockPixels alp(*bitmap); |
| int w = bitmap->width(); |
| int h = bitmap->height(); |
| intptr_t pixels = reinterpret_cast<intptr_t>(bitmap->getPixels()); |
| for (int y = 0; y < h; ++y) { |
| for (int x = 0; x < w; ++x) { |
| SkPMColor initColor = get_dst_bmp_init_color(x, y, w); |
| if (kAlpha_8_SkColorType == bitmap->colorType()) { |
| uint8_t* alpha = reinterpret_cast<uint8_t*>(pixels + y * bitmap->rowBytes() + x); |
| *alpha = SkGetPackedA32(initColor); |
| } else { |
| SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bitmap->rowBytes() + x * bitmap->bytesPerPixel()); |
| *pixel = initColor; |
| } |
| } |
| } |
| } |
| |
| static bool check_read_pixel(SkPMColor a, SkPMColor b, bool didPremulConversion) { |
| if (!didPremulConversion) { |
| return a == b; |
| } |
| int32_t aA = static_cast<int32_t>(SkGetPackedA32(a)); |
| int32_t aR = static_cast<int32_t>(SkGetPackedR32(a)); |
| int32_t aG = static_cast<int32_t>(SkGetPackedG32(a)); |
| int32_t aB = SkGetPackedB32(a); |
| |
| int32_t bA = static_cast<int32_t>(SkGetPackedA32(b)); |
| int32_t bR = static_cast<int32_t>(SkGetPackedR32(b)); |
| int32_t bG = static_cast<int32_t>(SkGetPackedG32(b)); |
| int32_t bB = static_cast<int32_t>(SkGetPackedB32(b)); |
| |
| return aA == bA && |
| SkAbs32(aR - bR) <= 1 && |
| SkAbs32(aG - bG) <= 1 && |
| SkAbs32(aB - bB) <= 1; |
| } |
| |
| // checks the bitmap contains correct pixels after the readPixels |
| // if the bitmap was prefilled with pixels it checks that these weren't |
| // overwritten in the area outside the readPixels. |
| static bool check_read(skiatest::Reporter* reporter, |
| const SkBitmap& bitmap, |
| int x, int y, |
| bool checkCanvasPixels, |
| bool checkBitmapPixels, |
| SkColorType ct, |
| SkAlphaType at) { |
| SkASSERT(ct == bitmap.colorType() && at == bitmap.alphaType()); |
| SkASSERT(!bitmap.isNull()); |
| SkASSERT(checkCanvasPixels || checkBitmapPixels); |
| |
| int bw = bitmap.width(); |
| int bh = bitmap.height(); |
| |
| SkIRect srcRect = SkIRect::MakeXYWH(x, y, bw, bh); |
| SkIRect clippedSrcRect = DEV_RECT; |
| if (!clippedSrcRect.intersect(srcRect)) { |
| clippedSrcRect.setEmpty(); |
| } |
| SkAutoLockPixels alp(bitmap); |
| if (kAlpha_8_SkColorType == ct) { |
| for (int by = 0; by < bh; ++by) { |
| for (int bx = 0; bx < bw; ++bx) { |
| int devx = bx + srcRect.fLeft; |
| int devy = by + srcRect.fTop; |
| const uint8_t* alpha = bitmap.getAddr8(bx, by); |
| |
| if (clippedSrcRect.contains(devx, devy)) { |
| if (checkCanvasPixels) { |
| uint8_t canvasAlpha = SkGetPackedA32(get_src_color(devx, devy)); |
| if (canvasAlpha != *alpha) { |
| ERRORF(reporter, "Expected readback alpha (%d, %d) value 0x%02x, got 0x%02x. ", |
| bx, by, canvasAlpha, *alpha); |
| return false; |
| } |
| } |
| } else if (checkBitmapPixels) { |
| uint32_t origDstAlpha = SkGetPackedA32(get_dst_bmp_init_color(bx, by, bw)); |
| if (origDstAlpha != *alpha) { |
| ERRORF(reporter, "Expected clipped out area of readback to be unchanged. " |
| "Expected 0x%02x, got 0x%02x", origDstAlpha, *alpha); |
| return false; |
| } |
| } |
| } |
| } |
| return true; |
| } |
| for (int by = 0; by < bh; ++by) { |
| for (int bx = 0; bx < bw; ++bx) { |
| int devx = bx + srcRect.fLeft; |
| int devy = by + srcRect.fTop; |
| |
| const uint32_t* pixel = bitmap.getAddr32(bx, by); |
| |
| if (clippedSrcRect.contains(devx, devy)) { |
| if (checkCanvasPixels) { |
| SkPMColor canvasPixel = get_src_color(devx, devy); |
| bool didPremul; |
| SkPMColor pmPixel = convert_to_pmcolor(ct, at, pixel, &didPremul); |
| if (!check_read_pixel(pmPixel, canvasPixel, didPremul)) { |
| ERRORF(reporter, "Expected readback pixel (%d, %d) value 0x%08x, got 0x%08x. " |
| "Readback was unpremul: %d", bx, by, canvasPixel, pmPixel, didPremul); |
| return false; |
| } |
| } |
| } else if (checkBitmapPixels) { |
| uint32_t origDstPixel = get_dst_bmp_init_color(bx, by, bw); |
| if (origDstPixel != *pixel) { |
| ERRORF(reporter, "Expected clipped out area of readback to be unchanged. " |
| "Expected 0x%08x, got 0x%08x", origDstPixel, *pixel); |
| return false; |
| } |
| } |
| } |
| } |
| return true; |
| } |
| |
| enum BitmapInit { |
| kFirstBitmapInit = 0, |
| |
| kNoPixels_BitmapInit = kFirstBitmapInit, |
| kTight_BitmapInit, |
| kRowBytes_BitmapInit, |
| kRowBytesOdd_BitmapInit, |
| |
| kLastAligned_BitmapInit = kRowBytes_BitmapInit, |
| |
| #if 0 // THIS CAUSES ERRORS ON WINDOWS AND SOME ANDROID DEVICES |
| kLast_BitmapInit = kRowBytesOdd_BitmapInit |
| #else |
| kLast_BitmapInit = kLastAligned_BitmapInit |
| #endif |
| }; |
| |
| static BitmapInit nextBMI(BitmapInit bmi) { |
| int x = bmi; |
| return static_cast<BitmapInit>(++x); |
| } |
| |
| static void init_bitmap(SkBitmap* bitmap, const SkIRect& rect, BitmapInit init, SkColorType ct, |
| SkAlphaType at) { |
| SkImageInfo info = SkImageInfo::Make(rect.width(), rect.height(), ct, at); |
| size_t rowBytes = 0; |
| bool alloc = true; |
| switch (init) { |
| case kNoPixels_BitmapInit: |
| alloc = false; |
| case kTight_BitmapInit: |
| break; |
| case kRowBytes_BitmapInit: |
| rowBytes = SkAlign4((info.width() + 16) * info.bytesPerPixel()); |
| break; |
| case kRowBytesOdd_BitmapInit: |
| rowBytes = SkAlign4(info.width() * info.bytesPerPixel()) + 3; |
| break; |
| default: |
| SkASSERT(0); |
| break; |
| } |
| |
| if (alloc) { |
| bitmap->allocPixels(info, rowBytes); |
| } else { |
| bitmap->setInfo(info, rowBytes); |
| } |
| } |
| |
| static const struct { |
| SkColorType fColorType; |
| SkAlphaType fAlphaType; |
| } gReadPixelsConfigs[] = { |
| { kRGBA_8888_SkColorType, kPremul_SkAlphaType }, |
| { kRGBA_8888_SkColorType, kUnpremul_SkAlphaType }, |
| { kBGRA_8888_SkColorType, kPremul_SkAlphaType }, |
| { kBGRA_8888_SkColorType, kUnpremul_SkAlphaType }, |
| { kAlpha_8_SkColorType, kPremul_SkAlphaType }, |
| }; |
| const SkIRect gReadPixelsTestRects[] = { |
| // entire thing |
| DEV_RECT, |
| // larger on all sides |
| SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H + 10), |
| // fully contained |
| SkIRect::MakeLTRB(DEV_W / 4, DEV_H / 4, 3 * DEV_W / 4, 3 * DEV_H / 4), |
| // outside top left |
| SkIRect::MakeLTRB(-10, -10, -1, -1), |
| // touching top left corner |
| SkIRect::MakeLTRB(-10, -10, 0, 0), |
| // overlapping top left corner |
| SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H / 4), |
| // overlapping top left and top right corners |
| SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H / 4), |
| // touching entire top edge |
| SkIRect::MakeLTRB(-10, -10, DEV_W + 10, 0), |
| // overlapping top right corner |
| SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H / 4), |
| // contained in x, overlapping top edge |
| SkIRect::MakeLTRB(DEV_W / 4, -10, 3 * DEV_W / 4, DEV_H / 4), |
| // outside top right corner |
| SkIRect::MakeLTRB(DEV_W + 1, -10, DEV_W + 10, -1), |
| // touching top right corner |
| SkIRect::MakeLTRB(DEV_W, -10, DEV_W + 10, 0), |
| // overlapping top left and bottom left corners |
| SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H + 10), |
| // touching entire left edge |
| SkIRect::MakeLTRB(-10, -10, 0, DEV_H + 10), |
| // overlapping bottom left corner |
| SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W / 4, DEV_H + 10), |
| // contained in y, overlapping left edge |
| SkIRect::MakeLTRB(-10, DEV_H / 4, DEV_W / 4, 3 * DEV_H / 4), |
| // outside bottom left corner |
| SkIRect::MakeLTRB(-10, DEV_H + 1, -1, DEV_H + 10), |
| // touching bottom left corner |
| SkIRect::MakeLTRB(-10, DEV_H, 0, DEV_H + 10), |
| // overlapping bottom left and bottom right corners |
| SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10), |
| // touching entire left edge |
| SkIRect::MakeLTRB(0, DEV_H, DEV_W, DEV_H + 10), |
| // overlapping bottom right corner |
| SkIRect::MakeLTRB(3 * DEV_W / 4, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10), |
| // overlapping top right and bottom right corners |
| SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H + 10), |
| }; |
| |
| static void test_readpixels(skiatest::Reporter* reporter, const sk_sp<SkSurface>& surface, |
| BitmapInit lastBitmapInit) { |
| SkCanvas* canvas = surface->getCanvas(); |
| fill_src_canvas(canvas); |
| for (size_t rect = 0; rect < SK_ARRAY_COUNT(gReadPixelsTestRects); ++rect) { |
| const SkIRect& srcRect = gReadPixelsTestRects[rect]; |
| for (BitmapInit bmi = kFirstBitmapInit; bmi <= lastBitmapInit; bmi = nextBMI(bmi)) { |
| for (size_t c = 0; c < SK_ARRAY_COUNT(gReadPixelsConfigs); ++c) { |
| SkBitmap bmp; |
| init_bitmap(&bmp, srcRect, bmi, |
| gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType); |
| |
| // if the bitmap has pixels allocated before the readPixels, |
| // note that and fill them with pattern |
| bool startsWithPixels = !bmp.isNull(); |
| if (startsWithPixels) { |
| fill_dst_bmp_with_init_data(&bmp); |
| } |
| uint32_t idBefore = surface->generationID(); |
| bool success = canvas->readPixels(&bmp, srcRect.fLeft, srcRect.fTop); |
| uint32_t idAfter = surface->generationID(); |
| |
| // we expect to succeed when the read isn't fully clipped |
| // out. |
| bool expectSuccess = SkIRect::Intersects(srcRect, DEV_RECT); |
| // determine whether we expected the read to succeed. |
| REPORTER_ASSERT(reporter, success == expectSuccess); |
| // read pixels should never change the gen id |
| REPORTER_ASSERT(reporter, idBefore == idAfter); |
| |
| if (success || startsWithPixels) { |
| check_read(reporter, bmp, srcRect.fLeft, srcRect.fTop, |
| success, startsWithPixels, |
| gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType); |
| } else { |
| // if we had no pixels beforehand and the readPixels |
| // failed then our bitmap should still not have pixels |
| REPORTER_ASSERT(reporter, bmp.isNull()); |
| } |
| } |
| // check the old webkit version of readPixels that clips the |
| // bitmap size |
| SkBitmap wkbmp; |
| bool success = canvas->readPixels(srcRect, &wkbmp); |
| SkIRect clippedRect = DEV_RECT; |
| if (clippedRect.intersect(srcRect)) { |
| REPORTER_ASSERT(reporter, success); |
| REPORTER_ASSERT(reporter, kN32_SkColorType == wkbmp.colorType()); |
| REPORTER_ASSERT(reporter, kPremul_SkAlphaType == wkbmp.alphaType()); |
| check_read(reporter, wkbmp, clippedRect.fLeft, |
| clippedRect.fTop, true, false, |
| kN32_SkColorType, kPremul_SkAlphaType); |
| } else { |
| REPORTER_ASSERT(reporter, !success); |
| } |
| } |
| } |
| } |
| DEF_TEST(ReadPixels, reporter) { |
| const SkImageInfo info = SkImageInfo::MakeN32Premul(DEV_W, DEV_H); |
| auto surface(SkSurface::MakeRaster(info)); |
| // SW readback fails a premul check when reading back to an unaligned rowbytes. |
| test_readpixels(reporter, surface, kLastAligned_BitmapInit); |
| } |
| #if SK_SUPPORT_GPU |
| DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadPixels_Gpu, reporter, ctxInfo) { |
| const SkImageInfo ii = SkImageInfo::MakeN32Premul(DEV_W, DEV_H); |
| for (auto& origin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) { |
| sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(ctxInfo.grContext(), SkBudgeted::kNo, |
| ii, 0, origin, nullptr)); |
| test_readpixels(reporter, surface, kLast_BitmapInit); |
| } |
| } |
| #endif |
| |
| #if SK_SUPPORT_GPU |
| static void test_readpixels_texture(skiatest::Reporter* reporter, GrTexture* texture) { |
| fill_src_texture(texture); |
| for (size_t rect = 0; rect < SK_ARRAY_COUNT(gReadPixelsTestRects); ++rect) { |
| const SkIRect& srcRect = gReadPixelsTestRects[rect]; |
| for (BitmapInit bmi = kFirstBitmapInit; bmi <= kLast_BitmapInit; bmi = nextBMI(bmi)) { |
| for (size_t c = 0; c < SK_ARRAY_COUNT(gReadPixelsConfigs); ++c) { |
| SkBitmap bmp; |
| init_bitmap(&bmp, srcRect, bmi, |
| gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType); |
| |
| // if the bitmap has pixels allocated before the readPixels, |
| // note that and fill them with pattern |
| bool startsWithPixels = !bmp.isNull(); |
| // Try doing the read directly from a non-renderable texture |
| if (startsWithPixels) { |
| fill_dst_bmp_with_init_data(&bmp); |
| GrPixelConfig dstConfig = |
| SkImageInfo2GrPixelConfig(gReadPixelsConfigs[c].fColorType, |
| gReadPixelsConfigs[c].fAlphaType, |
| nullptr, |
| *texture->getContext()->caps()); |
| uint32_t flags = 0; |
| if (gReadPixelsConfigs[c].fAlphaType == kUnpremul_SkAlphaType) { |
| flags = GrContext::kUnpremul_PixelOpsFlag; |
| } |
| bmp.lockPixels(); |
| bool success = texture->readPixels(srcRect.fLeft, srcRect.fTop, bmp.width(), |
| bmp.height(), dstConfig, bmp.getPixels(), |
| bmp.rowBytes(), flags); |
| bmp.unlockPixels(); |
| check_read(reporter, bmp, srcRect.fLeft, srcRect.fTop, |
| success, true, |
| gReadPixelsConfigs[c].fColorType, gReadPixelsConfigs[c].fAlphaType); |
| } |
| } |
| } |
| } |
| } |
| DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadPixels_Texture, reporter, ctxInfo) { |
| // On the GPU we will also try reading back from a non-renderable texture. |
| for (auto origin : {kBottomLeft_GrSurfaceOrigin, kTopLeft_GrSurfaceOrigin}) { |
| for (auto flags : {kNone_GrSurfaceFlags, kRenderTarget_GrSurfaceFlag}) { |
| GrSurfaceDesc desc; |
| desc.fFlags = flags; |
| desc.fWidth = DEV_W; |
| desc.fHeight = DEV_H; |
| desc.fConfig = kSkia8888_GrPixelConfig; |
| desc.fOrigin = origin; |
| sk_sp<GrTexture> texture(ctxInfo.grContext()->textureProvider()->createTexture(desc, |
| SkBudgeted::kNo)); |
| test_readpixels_texture(reporter, texture.get()); |
| } |
| } |
| } |
| #endif |