AuroraMiddleware/skia2
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add gm to show miplevels

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BUG=skia:
TBR=

NOTREECHECKS=true

Review URL: https://codereview.chromium.org/849173004
This commit is contained in:
reed 2015-01-15 18:09:15 -08:00 committed by Commit bot
parent f77156e192
commit a598f4b773
1 changed files with 72 additions and 13 deletions
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85
gm/downsamplebitmap.cpp
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@ -14,6 +14,22 @@
#include "SkStream.h"
#include "SkPaint.h"
static void make_checker(SkBitmap* bm, int size, int numChecks) {
bm->allocN32Pixels(size, size);
for (int y = 0; y < size; ++y) {
for (int x = 0; x < size; ++x) {
SkPMColor* s = bm->getAddr32(x, y);
int cx = (x * numChecks) / size;
int cy = (y * numChecks) / size;
if ((cx+cy)%2) {
*s = 0xFFFFFFFF;
} else {
*s = 0xFF000000;
}
}
}
}
static void setTypeface(SkPaint* paint, const char name[], SkTypeface::Style style) {
sk_tool_utils::set_portable_typeface(paint, name, style);
}
@ -139,19 +155,7 @@ class DownsampleBitmapCheckerboardGM: public DownsampleBitmapGM {
int fNumChecks;
void make_bitmap() SK_OVERRIDE {
fBM.allocN32Pixels(fSize, fSize);
for (int y = 0; y < fSize; ++y) {
for (int x = 0; x < fSize; ++x) {
SkPMColor* s = fBM.getAddr32(x, y);
int cx = (x * fNumChecks) / fSize;
int cy = (y * fNumChecks) / fSize;
if ((cx+cy)%2) {
*s = 0xFFFFFFFF;
} else {
*s = 0xFF000000;
}
}
}
make_checker(&fBM, fSize, fNumChecks);
}
private:
typedef DownsampleBitmapGM INHERITED;
@ -190,6 +194,59 @@ class DownsampleBitmapImageGM: public DownsampleBitmapGM {
typedef DownsampleBitmapGM INHERITED;
};
#include "SkMipMap.h"
class ShowMipLevels : public skiagm::GM {
public:
SkBitmap fBM;
ShowMipLevels() {
this->setBGColor(0xFFDDDDDD);
make_checker(&fBM, 512, 256);
}
protected:
#if 0
uint32_t onGetFlags() const SK_OVERRIDE {
return kSkipTiled_Flag;
}
#endif
SkString onShortName() SK_OVERRIDE {
return SkString("showmiplevels");
}
SkISize onISize() SK_OVERRIDE {
return SkISize::Make(fBM.width() + 4, 4 * fBM.height());
}
void onDraw(SkCanvas* canvas) SK_OVERRIDE {
SkScalar x = 4;
SkScalar y = 4;
canvas->drawBitmap(fBM, x, y, NULL);
y += fBM.height() + 4;
SkMipMap* mm = SkMipMap::Build(fBM, NULL);
SkMipMap::Level level;
SkScalar scale = 0.5f;
while (mm->extractLevel(scale, &level)) {
SkImageInfo info = SkImageInfo::MakeN32Premul(level.fWidth, level.fHeight);
SkBitmap bm;
bm.installPixels(info, level.fPixels, level.fRowBytes);
canvas->drawBitmap(bm, x, y, NULL);
y += bm.height() + 4;
scale /= 2;
if (info.width() == 1 || info.height() == 1) {
break;
}
}
}
private:
typedef skiagm::GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kHigh_FilterLevel); )
@ -215,3 +272,5 @@ DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kNone_Filter
DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kNone_FilterLevel); )
DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
SkPaint::kNone_FilterLevel); )
DEF_GM( return new ShowMipLevels; )