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/*
* 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 "SkBitmap.h"
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkPaint.h"
#include "SkPoint.h"
#include "SkRect.h"
#include "SkSurface.h"
#include "SkTypes.h"
#include "Test.h"
#include <math.h>
static const SkColor bgColor = SK_ColorWHITE;
static void create(SkBitmap* bm, SkIRect bound) {
bm->allocN32Pixels(bound.width(), bound.height());
}
static void drawBG(SkCanvas* canvas) {
canvas->drawColor(bgColor);
}
/** Assumes that the ref draw was completely inside ref canvas --
implies that everything outside is "bgColor".
Checks that all overlap is the same and that all non-overlap on the
ref is "bgColor".
*/
static bool compare(const SkBitmap& ref, const SkIRect& iref,
const SkBitmap& test, const SkIRect& itest)
{
const int xOff = itest.fLeft - iref.fLeft;
const int yOff = itest.fTop - iref.fTop;
SkAutoLockPixels alpRef(ref);
SkAutoLockPixels alpTest(test);
for (int y = 0; y < test.height(); ++y) {
for (int x = 0; x < test.width(); ++x) {
SkColor testColor = test.getColor(x, y);
int refX = x + xOff;
int refY = y + yOff;
SkColor refColor;
if (refX >= 0 && refX < ref.width() &&
refY >= 0 && refY < ref.height())
{
refColor = ref.getColor(refX, refY);
} else {
refColor = bgColor;
}
if (refColor != testColor) {
return false;
}
}
}
return true;
}
DEF_TEST(DrawText, reporter) {
SkPaint paint;
paint.setColor(SK_ColorGRAY);
paint.setTextSize(SkIntToScalar(20));
SkIRect drawTextRect = SkIRect::MakeWH(64, 64);
SkBitmap drawTextBitmap;
create(&drawTextBitmap, drawTextRect);
SkCanvas drawTextCanvas(drawTextBitmap);
SkIRect drawPosTextRect = SkIRect::MakeWH(64, 64);
SkBitmap drawPosTextBitmap;
create(&drawPosTextBitmap, drawPosTextRect);
SkCanvas drawPosTextCanvas(drawPosTextBitmap);
// Two test cases "A" for the normal path through the code, and " " to check the
// early return path.
const char* cases[] = {"A", " "};
for (auto c : cases) {
for (float offsetY = 0.0f; offsetY < 1.0f; offsetY += (1.0f / 16.0f)) {
for (float offsetX = 0.0f; offsetX < 1.0f; offsetX += (1.0f / 16.0f)) {
SkPoint point = SkPoint::Make(25.0f + offsetX,
25.0f + offsetY);
for (int align = 0; align < SkPaint::kAlignCount; ++align) {
paint.setTextAlign(static_cast<SkPaint::Align>(align));
for (unsigned int flags = 0; flags < (1 << 3); ++flags) {
static const unsigned int antiAliasFlag = 1;
static const unsigned int subpixelFlag = 1 << 1;
static const unsigned int lcdFlag = 1 << 2;
paint.setAntiAlias(SkToBool(flags & antiAliasFlag));
paint.setSubpixelText(SkToBool(flags & subpixelFlag));
paint.setLCDRenderText(SkToBool(flags & lcdFlag));
// Test: drawText and drawPosText draw the same.
drawBG(&drawTextCanvas);
drawTextCanvas.drawText(c, 1, point.fX, point.fY, paint);
drawBG(&drawPosTextCanvas);
drawPosTextCanvas.drawPosText(c, 1, &point, paint);
REPORTER_ASSERT(reporter,
compare(drawTextBitmap, drawTextRect,
drawPosTextBitmap, drawPosTextRect));
}
}
}
}
}
}
// Test drawing text at some unusual coordinates.
// We measure success by not crashing or asserting.
DEF_TEST(DrawText_weirdCoordinates, r) {
auto surface = SkSurface::MakeRasterN32Premul(10,10);
auto canvas = surface->getCanvas();
SkScalar oddballs[] = { 0.0f, (float)INFINITY, (float)NAN, 34359738368.0f };
for (auto x : oddballs) {
canvas->drawText("a", 1, +x, 0.0f, SkPaint());
canvas->drawText("a", 1, -x, 0.0f, SkPaint());
}
for (auto y : oddballs) {
canvas->drawText("a", 1, 0.0f, +y, SkPaint());
canvas->drawText("a", 1, 0.0f, -y, SkPaint());
}
}
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