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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Test.h"
#include "SkPaint.h"
#include "SkTypeface.h"
#include "SkEndian.h"
//#define DUMP_TABLES
#define kFontTableTag_head SkSetFourByteTag('h', 'e', 'a', 'd')
#define kFontTableTag_hhea SkSetFourByteTag('h', 'h', 'e', 'a')
#define kFontTableTag_maxp SkSetFourByteTag('m', 'a', 'x', 'p')
static const struct TagSize {
SkFontTableTag fTag;
size_t fSize;
} gKnownTableSizes[] = {
{ kFontTableTag_head, 54 },
{ kFontTableTag_hhea, 36 },
{ kFontTableTag_maxp, 32 },
};
static void test_unitsPerEm(skiatest::Reporter* reporter, SkTypeface* face) {
int upem = face->getUnitsPerEm();
if (0 == upem) return;
size_t size = face->getTableSize(kFontTableTag_head);
if (size) {
SkAutoMalloc storage(size);
char* ptr = (char*)storage.get();
face->getTableData(kFontTableTag_head, 0, size, ptr);
// unitsPerEm is at offset 18 into the 'head' table.
int upem2 = SkEndian_SwapBE16(*(uint16_t*)&ptr[18]);
REPORTER_ASSERT(reporter, upem2 == upem);
}
}
static void test_tables(skiatest::Reporter* reporter, SkTypeface* face) {
SkFontID fontID = face->uniqueID();
if (false) { // avoid bit rot, suppress warning
REPORTER_ASSERT(reporter, fontID);
}
int count = face->countTables();
SkAutoTMalloc<SkFontTableTag> storage(count);
SkFontTableTag* tags = storage.get();
int count2 = face->getTableTags(tags);
REPORTER_ASSERT(reporter, count2 == count);
for (int i = 0; i < count; ++i) {
size_t size = face->getTableSize(tags[i]);
REPORTER_ASSERT(reporter, size > 0);
#ifdef DUMP_TABLES
char name[5];
name[0] = (tags[i] >> 24) & 0xFF;
name[1] = (tags[i] >> 16) & 0xFF;
name[2] = (tags[i] >> 8) & 0xFF;
name[3] = (tags[i] >> 0) & 0xFF;
name[4] = 0;
SkDebugf("%s %d\n", name, size);
#endif
for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) {
if (gKnownTableSizes[j].fTag == tags[i]) {
REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size);
}
}
// do we get the same size from GetTableData and GetTableSize
{
SkAutoMalloc data(size);
size_t size2 = face->getTableData(tags[i], 0, size, data.get());
REPORTER_ASSERT(reporter, size2 == size);
}
}
}
static void test_tables(skiatest::Reporter* reporter) {
static const char* const gNames[] = {
NULL, // default font
"Arial", "Times", "Times New Roman", "Helvetica", "Courier",
"Courier New", "Terminal", "MS Sans Serif",
};
for (size_t i = 0; i < SK_ARRAY_COUNT(gNames); ++i) {
SkTypeface* face = SkTypeface::CreateFromName(gNames[i],
SkTypeface::kNormal);
if (face) {
#ifdef DUMP_TABLES
SkDebugf("%s\n", gNames[i]);
#endif
test_tables(reporter, face);
test_unitsPerEm(reporter, face);
face->unref();
}
}
}
/*
* Verifies that the advance values returned by generateAdvance and
* generateMetrics match.
*/
static void test_advances(skiatest::Reporter* reporter) {
static const char* const faces[] = {
NULL, // default font
"Arial", "Times", "Times New Roman", "Helvetica", "Courier",
"Courier New", "Verdana", "monospace",
};
static const struct {
SkPaint::Hinting hinting;
unsigned flags;
} settings[] = {
{ SkPaint::kNo_Hinting, 0 },
{ SkPaint::kNo_Hinting, SkPaint::kLinearText_Flag },
{ SkPaint::kNo_Hinting, SkPaint::kSubpixelText_Flag },
{ SkPaint::kSlight_Hinting, 0 },
{ SkPaint::kSlight_Hinting, SkPaint::kLinearText_Flag },
{ SkPaint::kSlight_Hinting, SkPaint::kSubpixelText_Flag },
{ SkPaint::kNormal_Hinting, 0 },
{ SkPaint::kNormal_Hinting, SkPaint::kLinearText_Flag },
{ SkPaint::kNormal_Hinting, SkPaint::kSubpixelText_Flag },
};
static const struct {
SkScalar fScaleX;
SkScalar fSkewX;
} gScaleRec[] = {
{ SK_Scalar1, 0 },
{ SK_Scalar1/2, 0 },
// these two exercise obliquing (skew)
{ SK_Scalar1, -SK_Scalar1/4 },
{ SK_Scalar1/2, -SK_Scalar1/4 },
};
SkPaint paint;
char txt[] = "long.text.with.lots.of.dots.";
for (size_t i = 0; i < SK_ARRAY_COUNT(faces); i++) {
SkTypeface* face = SkTypeface::CreateFromName(faces[i], SkTypeface::kNormal);
paint.setTypeface(face);
for (size_t j = 0; j < SK_ARRAY_COUNT(settings); j++) {
paint.setHinting(settings[j].hinting);
paint.setLinearText((settings[j].flags & SkPaint::kLinearText_Flag) != 0);
paint.setSubpixelText((settings[j].flags & SkPaint::kSubpixelText_Flag) != 0);
for (size_t k = 0; k < SK_ARRAY_COUNT(gScaleRec); ++k) {
paint.setTextScaleX(gScaleRec[k].fScaleX);
paint.setTextSkewX(gScaleRec[k].fSkewX);
SkRect bounds;
// For no hinting and light hinting this should take the
// optimized generateAdvance path.
SkScalar width1 = paint.measureText(txt, strlen(txt));
// Requesting the bounds forces a generateMetrics call.
SkScalar width2 = paint.measureText(txt, strlen(txt), &bounds);
// SkDebugf("Font: %s, generateAdvance: %f, generateMetrics: %f\n",
// faces[i], SkScalarToFloat(width1), SkScalarToFloat(width2));
REPORTER_ASSERT(reporter, width1 == width2);
}
}
}
}
static void TestFontHost(skiatest::Reporter* reporter) {
test_tables(reporter);
test_advances(reporter);
}
// need tests for SkStrSearch
#include "TestClassDef.h"
DEFINE_TESTCLASS("FontHost", FontHostTestClass, TestFontHost)
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