skia2/tools/sk_tool_utils.h
Mike Klein f436fbc422 slice GMs by native font platform, not by emoji format
Right now the native font platform implies what emoji formats are
supported, and we hope to support more than one per platform.  Let's
get these formats out of the name.

As with most other font-y things, only the NativeFont bots are going to
get back anything interesting now.  The others will see no emoji font
and an empty emoji sample text string.

I'm going to look at a pre-baked testing SkTypeface that serves as an
emoji font for the non-NativeFont bots next.

Change-Id: Ie1374fc0e988bfe20ae21208e2f7e0a66a68fcb1
Reviewed-on: https://skia-review.googlesource.com/71762
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
2017-11-15 16:52:56 +00:00

262 lines
8.7 KiB
C++

/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef sk_tool_utils_DEFINED
#define sk_tool_utils_DEFINED
#include "SkColor.h"
#include "SkImageEncoder.h"
#include "SkImageInfo.h"
#include "SkPixelSerializer.h"
#include "SkRandom.h"
#include "SkStream.h"
#include "SkTDArray.h"
#include "SkTypeface.h"
class SkBitmap;
class SkCanvas;
class SkColorFilter;
class SkPaint;
class SkPath;
class SkRRect;
class SkShader;
class SkTestFont;
class SkTextBlobBuilder;
namespace sk_tool_utils {
const char* colortype_name(SkColorType);
/**
* Map opaque colors from 8888 to 565.
*/
SkColor color_to_565(SkColor color);
/**
* Return a color emoji typeface if available.
*/
sk_sp<SkTypeface> emoji_typeface();
/**
* If the platform supports color emoji, return sample text the emoji can render.
*/
const char* emoji_sample_text();
/**
* Returns a string describing the platform font manager, if we're using one, otherwise "".
*/
const char* platform_font_manager();
/**
* Sets the paint to use a platform-independent text renderer
*/
void set_portable_typeface(SkPaint* paint, const char* name = nullptr,
SkFontStyle style = SkFontStyle());
/**
* Returns a platform-independent text renderer.
*/
sk_sp<SkTypeface> create_portable_typeface(const char* name, SkFontStyle style);
/** Call to clean up portable font references. */
void release_portable_typefaces();
/**
* Call canvas->writePixels() by using the pixels from bitmap, but with an info that claims
* the pixels are colorType + alphaType
*/
void write_pixels(SkCanvas*, const SkBitmap&, int x, int y, SkColorType, SkAlphaType);
/**
* Returns true iff all of the pixels between the two images differ by <= the maxDiff value
* per component.
*
* If the configs differ, return false.
*
* If the colorType is half-float, then maxDiff is interpreted as 0..255 --> 0..1
*/
bool equal_pixels(const SkPixmap&, const SkPixmap&, unsigned maxDiff = 0);
bool equal_pixels(const SkBitmap&, const SkBitmap&, unsigned maxDiff = 0);
// private to sk_tool_utils
sk_sp<SkTypeface> create_font(const char* name, SkFontStyle);
/** Returns a newly created CheckerboardShader. */
sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size);
/** Draw a checkerboard pattern in the current canvas, restricted to
the current clip, using SkXfermode::kSrc_Mode. */
void draw_checkerboard(SkCanvas* canvas,
SkColor color1,
SkColor color2,
int checkSize);
/** Make it easier to create a bitmap-based checkerboard */
SkBitmap create_checkerboard_bitmap(int w, int h,
SkColor c1, SkColor c2,
int checkSize);
/** A default checkerboard. */
inline void draw_checkerboard(SkCanvas* canvas) {
sk_tool_utils::draw_checkerboard(canvas, 0xFF999999, 0xFF666666, 8);
}
SkBitmap create_string_bitmap(int w, int h, SkColor c, int x, int y,
int textSize, const char* str);
// A helper for inserting a drawtext call into a SkTextBlobBuilder
void add_to_text_blob_w_len(SkTextBlobBuilder* builder, const char* text, size_t len,
const SkPaint& origPaint, SkScalar x, SkScalar y);
void add_to_text_blob(SkTextBlobBuilder* builder, const char* text,
const SkPaint& origPaint, SkScalar x, SkScalar y);
// Constructs a star by walking a 'numPts'-sided regular polygon with even/odd fill:
//
// moveTo(pts[0]);
// lineTo(pts[step % numPts]);
// ...
// lineTo(pts[(step * (N - 1)) % numPts]);
//
// numPts=5, step=2 will produce a classic five-point star.
//
// numPts and step must be co-prime.
SkPath make_star(const SkRect& bounds, int numPts = 5, int step = 2);
void make_big_path(SkPath& path);
// Return a blurred version of 'src'. This doesn't use a separable filter
// so it is slow!
SkBitmap slow_blur(const SkBitmap& src, float sigma);
SkRect compute_central_occluder(const SkRRect& rr);
SkRect compute_widest_occluder(const SkRRect& rr);
SkRect compute_tallest_occluder(const SkRRect& rr);
// A helper object to test the topological sorting code (TopoSortBench.cpp & TopoSortTest.cpp)
class TopoTestNode {
public:
TopoTestNode(int id) : fID(id), fOutputPos(-1), fTempMark(false) { }
void dependsOn(TopoTestNode* src) {
*fDependencies.append() = src;
}
int id() const { return fID; }
void reset() { fOutputPos = -1; }
int outputPos() const { return fOutputPos; }
// check that the topological sort is valid for this node
bool check() {
if (-1 == fOutputPos) {
return false;
}
for (int i = 0; i < fDependencies.count(); ++i) {
if (-1 == fDependencies[i]->outputPos()) {
return false;
}
// This node should've been output after all the nodes on which it depends
if (fOutputPos < fDependencies[i]->outputPos()) {
return false;
}
}
return true;
}
// The following 7 methods are needed by the topological sort
static void SetTempMark(TopoTestNode* node) { node->fTempMark = true; }
static void ResetTempMark(TopoTestNode* node) { node->fTempMark = false; }
static bool IsTempMarked(TopoTestNode* node) { return node->fTempMark; }
static void Output(TopoTestNode* node, int outputPos) {
SkASSERT(-1 != outputPos);
node->fOutputPos = outputPos;
}
static bool WasOutput(TopoTestNode* node) { return (-1 != node->fOutputPos); }
static int NumDependencies(TopoTestNode* node) { return node->fDependencies.count(); }
static TopoTestNode* Dependency(TopoTestNode* node, int index) {
return node->fDependencies[index];
}
// Helper functions for TopoSortBench & TopoSortTest
static void AllocNodes(SkTDArray<TopoTestNode*>* graph, int num) {
graph->setReserve(num);
for (int i = 0; i < num; ++i) {
*graph->append() = new TopoTestNode(i);
}
}
static void DeallocNodes(SkTDArray<TopoTestNode*>* graph) {
for (int i = 0; i < graph->count(); ++i) {
delete (*graph)[i];
}
}
#ifdef SK_DEBUG
static void Print(const SkTDArray<TopoTestNode*>& graph) {
for (int i = 0; i < graph.count(); ++i) {
SkDebugf("%d, ", graph[i]->id());
}
SkDebugf("\n");
}
#endif
// randomize the array
static void Shuffle(SkTDArray<TopoTestNode*>* graph, SkRandom* rand) {
for (int i = graph->count()-1; i > 0; --i) {
int swap = rand->nextU() % (i+1);
TopoTestNode* tmp = (*graph)[i];
(*graph)[i] = (*graph)[swap];
(*graph)[swap] = tmp;
}
}
private:
int fID;
int fOutputPos;
bool fTempMark;
SkTDArray<TopoTestNode*> fDependencies;
};
template <typename T>
inline bool EncodeImageToFile(const char* path, const T& src, SkEncodedImageFormat f, int q) {
SkFILEWStream file(path);
return file.isValid() && SkEncodeImage(&file, src, f, q);
}
template <typename T>
inline sk_sp<SkData> EncodeImageToData(const T& src, SkEncodedImageFormat f, int q) {
SkDynamicMemoryWStream buf;
return SkEncodeImage(&buf, src , f, q) ? buf.detachAsData() : nullptr;
}
/**
* Uses SkEncodeImage to serialize images that are not already
* encoded as SkEncodedImageFormat::kPNG images.
*/
inline sk_sp<SkPixelSerializer> MakePixelSerializer() {
struct EncodeImagePixelSerializer final : SkPixelSerializer {
bool onUseEncodedData(const void*, size_t) override { return true; }
SkData* onEncode(const SkPixmap& pmap) override {
return EncodeImageToData(pmap, SkEncodedImageFormat::kPNG, 100).release();
}
};
return sk_make_sp<EncodeImagePixelSerializer>();
}
bool copy_to(SkBitmap* dst, SkColorType dstCT, const SkBitmap& src);
void copy_to_g8(SkBitmap* dst, const SkBitmap& src);
} // namespace sk_tool_utils
#endif // sk_tool_utils_DEFINED