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skia2/tests/SVGDeviceTest.cpp
Hal Canary 2a2f675926 SkTypes: extract SkTo 
Change-Id: I8de790d5013db2105ad885fa2683303d7c250b09
Reviewed-on: https://skia-review.googlesource.com/133620
Reviewed-by: Mike Klein <mtklein@google.com>
2018-06-12 15:03:21 +00:00

344 lines
12 KiB
C++
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/*
* Copyright 2015 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 "SkData.h"
#include "SkImage.h"
#include "SkImageShader.h"
#include "SkParse.h"
#include "SkShader.h"
#include "SkStream.h"
#include "SkTo.h"
#include "Test.h"
#include <string.h>
#ifdef SK_XML
#include "SkDOM.h"
#include "SkSVGCanvas.h"
#include "SkXMLWriter.h"
#if 0
Using the new system where devices only gets glyphs causes this to fail because the font has no
glyph to unichar data.
namespace {
void check_text_node(skiatest::Reporter* reporter,
const SkDOM& dom,
const SkDOM::Node* root,
const SkPoint& offset,
unsigned scalarsPerPos,
const char* expected) {
if (root == nullptr) {
ERRORF(reporter, "root element not found.");
return;
}
const SkDOM::Node* textElem = dom.getFirstChild(root, "text");
if (textElem == nullptr) {
ERRORF(reporter, "<text> element not found.");
return;
}
REPORTER_ASSERT(reporter, dom.getType(textElem) == SkDOM::kElement_Type);
const SkDOM::Node* textNode= dom.getFirstChild(textElem);
REPORTER_ASSERT(reporter, textNode != nullptr);
if (textNode != nullptr) {
REPORTER_ASSERT(reporter, dom.getType(textNode) == SkDOM::kText_Type);
if (strcmp(expected, dom.getName(textNode)) != 0) {
SkDebugf("string fail %s == %s\n", expected, dom.getName(textNode));
}
REPORTER_ASSERT(reporter, strcmp(expected, dom.getName(textNode)) == 0);
}
int textLen = SkToInt(strlen(expected));
const char* x = dom.findAttr(textElem, "x");
REPORTER_ASSERT(reporter, x != nullptr);
if (x != nullptr) {
int xposCount = (scalarsPerPos < 1) ? 1 : textLen;
REPORTER_ASSERT(reporter, SkParse::Count(x) == xposCount);
SkAutoTMalloc<SkScalar> xpos(xposCount);
SkParse::FindScalars(x, xpos.get(), xposCount);
if (scalarsPerPos < 1) {
REPORTER_ASSERT(reporter, xpos[0] == offset.x());
} else {
for (int i = 0; i < xposCount; ++i) {
if (xpos[i] != SkIntToScalar(expected[i])) {
SkDebugf("Bad xs %g == %g\n", xpos[i], SkIntToScalar(expected[i]));
}
REPORTER_ASSERT(reporter, xpos[i] == SkIntToScalar(expected[i]));
}
}
}
const char* y = dom.findAttr(textElem, "y");
REPORTER_ASSERT(reporter, y != nullptr);
if (y != nullptr) {
int yposCount = (scalarsPerPos < 2) ? 1 : textLen;
REPORTER_ASSERT(reporter, SkParse::Count(y) == yposCount);
SkAutoTMalloc<SkScalar> ypos(yposCount);
SkParse::FindScalars(y, ypos.get(), yposCount);
if (scalarsPerPos < 2) {
REPORTER_ASSERT(reporter, ypos[0] == offset.y());
} else {
for (int i = 0; i < yposCount; ++i) {
REPORTER_ASSERT(reporter, ypos[i] == -SkIntToScalar(expected[i]));
}
}
}
}
void test_whitespace_pos(skiatest::Reporter* reporter,
const char* txt,
const char* expected) {
size_t len = strlen(txt);
SkDOM dom;
SkPaint paint;
SkPoint offset = SkPoint::Make(10, 20);
{
SkXMLParserWriter writer(dom.beginParsing());
std::unique_ptr<SkCanvas> svgCanvas = SkSVGCanvas::Make(SkRect::MakeWH(100, 100), &writer);
svgCanvas->drawText(txt, len, offset.x(), offset.y(), paint);
}
check_text_node(reporter, dom, dom.finishParsing(), offset, 2, expected);
{
SkAutoTMalloc<SkScalar> xpos(len);
for (int i = 0; i < SkToInt(len); ++i) {
xpos[i] = SkIntToScalar(txt[i]);
}
SkXMLParserWriter writer(dom.beginParsing());
std::unique_ptr<SkCanvas> svgCanvas = SkSVGCanvas::Make(SkRect::MakeWH(100, 100), &writer);
svgCanvas->drawPosTextH(txt, len, xpos, offset.y(), paint);
}
check_text_node(reporter, dom, dom.finishParsing(), offset, 2, expected);
{
SkAutoTMalloc<SkPoint> pos(len);
for (int i = 0; i < SkToInt(len); ++i) {
pos[i] = SkPoint::Make(SkIntToScalar(txt[i]), -SkIntToScalar(txt[i]));
}
SkXMLParserWriter writer(dom.beginParsing());
std::unique_ptr<SkCanvas> svgCanvas = SkSVGCanvas::Make(SkRect::MakeWH(100, 100), &writer);
svgCanvas->drawPosText(txt, len, pos, paint);
}
check_text_node(reporter, dom, dom.finishParsing(), offset, 2, expected);
}
}
DEF_TEST(SVGDevice_whitespace_pos, reporter) {
static const struct {
const char* tst_in;
const char* tst_out;
} tests[] = {
{ "abcd" , "abcd" },
{ "ab cd" , "ab cd" },
{ "ab \t\t cd", "ab cd" },
{ " abcd" , "abcd" },
{ " abcd" , "abcd" },
{ " \t\t abcd", "abcd" },
{ "abcd " , "abcd " }, // we allow one trailing whitespace char
{ "abcd " , "abcd " }, // because it makes no difference and
{ "abcd\t " , "abcd\t" }, // simplifies the implementation
{ "\t\t \t ab \t\t \t cd \t\t \t ", "ab cd " },
};
for (unsigned i = 0; i < SK_ARRAY_COUNT(tests); ++i) {
test_whitespace_pos(reporter, tests[i].tst_in, tests[i].tst_out);
}
}
#endif
void SetImageShader(SkPaint* paint, int imageWidth, int imageHeight, SkShader::TileMode xTile,
SkShader::TileMode yTile) {
auto surface = SkSurface::MakeRasterN32Premul(imageWidth, imageHeight);
paint->setShader(SkImageShader::Make(surface->makeImageSnapshot(), xTile, yTile, nullptr));
}
// Attempt to find the three nodes on which we have expectations:
// the pattern node, the image within that pattern, and the rect which
// uses the pattern as a fill.
// returns false if not all nodes are found.
bool FindImageShaderNodes(skiatest::Reporter* reporter, const SkDOM* dom, const SkDOM::Node* root,
const SkDOM::Node** patternOut, const SkDOM::Node** imageOut,
const SkDOM::Node** rectOut) {
if (root == nullptr || dom == nullptr) {
ERRORF(reporter, "root element not found");
return false;
}
const SkDOM::Node* rect = dom->getFirstChild(root, "rect");
if (rect == nullptr) {
ERRORF(reporter, "rect not found");
return false;
}
*rectOut = rect;
const SkDOM::Node* defs = dom->getFirstChild(root, "defs");
if (defs == nullptr) {
ERRORF(reporter, "defs not found");
return false;
}
const SkDOM::Node* pattern = dom->getFirstChild(defs, "pattern");
if (pattern == nullptr) {
ERRORF(reporter, "pattern not found");
return false;
}
*patternOut = pattern;
const SkDOM::Node* image = dom->getFirstChild(pattern, "image");
if (image == nullptr) {
ERRORF(reporter, "image not found");
return false;
}
*imageOut = image;
return true;
}
void ImageShaderTestSetup(SkDOM* dom, SkPaint* paint, int imageWidth, int imageHeight,
int rectWidth, int rectHeight, SkShader::TileMode xTile,
SkShader::TileMode yTile) {
SetImageShader(paint, imageWidth, imageHeight, xTile, yTile);
SkXMLParserWriter writer(dom->beginParsing());
std::unique_ptr<SkCanvas> svgCanvas = SkSVGCanvas::Make(SkRect::MakeWH(100, 100), &writer);
SkRect bounds{0, 0, SkIntToScalar(rectWidth), SkIntToScalar(rectHeight)};
svgCanvas->drawRect(bounds, *paint);
}
DEF_TEST(SVGDevice_image_shader_norepeat, reporter) {
SkDOM dom;
SkPaint paint;
int imageWidth = 3, imageHeight = 3;
int rectWidth = 10, rectHeight = 10;
ImageShaderTestSetup(&dom, &paint, imageWidth, imageHeight, rectWidth, rectHeight,
SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
const SkDOM::Node* root = dom.finishParsing();
const SkDOM::Node *patternNode, *imageNode, *rectNode;
bool structureAppropriate =
FindImageShaderNodes(reporter, &dom, root, &patternNode, &imageNode, &rectNode);
REPORTER_ASSERT(reporter, structureAppropriate);
// the image should always maintain its size.
REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "width")) == imageWidth);
REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "height")) == imageHeight);
// making the pattern as large as the container prevents
// it from repeating.
REPORTER_ASSERT(reporter, strcmp(dom.findAttr(patternNode, "width"), "100%") == 0);
REPORTER_ASSERT(reporter, strcmp(dom.findAttr(patternNode, "height"), "100%") == 0);
}
DEF_TEST(SVGDevice_image_shader_tilex, reporter) {
SkDOM dom;
SkPaint paint;
int imageWidth = 3, imageHeight = 3;
int rectWidth = 10, rectHeight = 10;
ImageShaderTestSetup(&dom, &paint, imageWidth, imageHeight, rectWidth, rectHeight,
SkShader::kRepeat_TileMode, SkShader::kClamp_TileMode);
const SkDOM::Node* root = dom.finishParsing();
const SkDOM::Node* innerSvg = dom.getFirstChild(root, "svg");
if (innerSvg == nullptr) {
ERRORF(reporter, "inner svg element not found");
return;
}
const SkDOM::Node *patternNode, *imageNode, *rectNode;
bool structureAppropriate =
FindImageShaderNodes(reporter, &dom, innerSvg, &patternNode, &imageNode, &rectNode);
REPORTER_ASSERT(reporter, structureAppropriate);
// the imageNode should always maintain its size.
REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "width")) == imageWidth);
REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "height")) == imageHeight);
// if the patternNode width matches the imageNode width,
// it will repeat in along the x axis.
REPORTER_ASSERT(reporter, atoi(dom.findAttr(patternNode, "width")) == imageWidth);
REPORTER_ASSERT(reporter, strcmp(dom.findAttr(patternNode, "height"), "100%") == 0);
}
DEF_TEST(SVGDevice_image_shader_tiley, reporter) {
SkDOM dom;
SkPaint paint;
int imageNodeWidth = 3, imageNodeHeight = 3;
int rectNodeWidth = 10, rectNodeHeight = 10;
ImageShaderTestSetup(&dom, &paint, imageNodeWidth, imageNodeHeight, rectNodeWidth,
rectNodeHeight, SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode);
const SkDOM::Node* root = dom.finishParsing();
const SkDOM::Node* innerSvg = dom.getFirstChild(root, "svg");
if (innerSvg == nullptr) {
ERRORF(reporter, "inner svg element not found");
return;
}
const SkDOM::Node *patternNode, *imageNode, *rectNode;
bool structureAppropriate =
FindImageShaderNodes(reporter, &dom, innerSvg, &patternNode, &imageNode, &rectNode);
REPORTER_ASSERT(reporter, structureAppropriate);
// the imageNode should always maintain its size.
REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "width")) == imageNodeWidth);
REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "height")) == imageNodeHeight);
// making the patternNode as large as the container prevents
// it from repeating.
REPORTER_ASSERT(reporter, strcmp(dom.findAttr(patternNode, "width"), "100%") == 0);
REPORTER_ASSERT(reporter, atoi(dom.findAttr(patternNode, "height")) == imageNodeHeight);
}
DEF_TEST(SVGDevice_image_shader_tileboth, reporter) {
SkDOM dom;
SkPaint paint;
int imageWidth = 3, imageHeight = 3;
int rectWidth = 10, rectHeight = 10;
ImageShaderTestSetup(&dom, &paint, imageWidth, imageHeight, rectWidth, rectHeight,
SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
const SkDOM::Node* root = dom.finishParsing();
const SkDOM::Node *patternNode, *imageNode, *rectNode;
const SkDOM::Node* innerSvg = dom.getFirstChild(root, "svg");
if (innerSvg == nullptr) {
ERRORF(reporter, "inner svg element not found");
return;
}
bool structureAppropriate =
FindImageShaderNodes(reporter, &dom, innerSvg, &patternNode, &imageNode, &rectNode);
REPORTER_ASSERT(reporter, structureAppropriate);
// the imageNode should always maintain its size.
REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "width")) == imageWidth);
REPORTER_ASSERT(reporter, atoi(dom.findAttr(imageNode, "height")) == imageHeight);
REPORTER_ASSERT(reporter, atoi(dom.findAttr(patternNode, "width")) == imageWidth);
REPORTER_ASSERT(reporter, atoi(dom.findAttr(patternNode, "height")) == imageHeight);
}
#endif
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