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241 lines
7.9 KiB
241 lines
7.9 KiB
4 months ago
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/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef sk_tool_utils_DEFINED
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#define sk_tool_utils_DEFINED
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#include "SkColor.h"
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#include "SkData.h"
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#include "SkEncodedImageFormat.h"
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#include "SkFont.h"
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#include "SkFontStyle.h"
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#include "SkFontTypes.h"
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#include "SkImageEncoder.h"
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#include "SkImageInfo.h"
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#include "SkRandom.h"
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#include "SkRect.h"
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#include "SkRefCnt.h"
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#include "SkScalar.h"
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#include "SkStream.h"
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#include "SkTArray.h"
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#include "SkTDArray.h"
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#include "SkTypeface.h"
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#include "SkTypes.h"
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class SkBitmap;
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class SkCanvas;
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class SkFontStyle;
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class SkImage;
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class SkPath;
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class SkPixmap;
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class SkRRect;
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class SkShader;
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class SkSurface;
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class SkSurfaceProps;
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class SkTextBlobBuilder;
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class SkTypeface;
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namespace sk_tool_utils {
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const char* alphatype_name(SkAlphaType);
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const char* colortype_name(SkColorType);
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/**
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* Map opaque colors from 8888 to 565.
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*/
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SkColor color_to_565(SkColor color);
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/**
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* Return a color emoji typeface if available.
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*/
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sk_sp<SkTypeface> emoji_typeface();
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/**
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* If the platform supports color emoji, return sample text the emoji can render.
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*/
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const char* emoji_sample_text();
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/**
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* Returns a string describing the platform font manager, if we're using one, otherwise "".
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*/
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const char* platform_font_manager();
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/**
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* Returns a platform-independent text renderer.
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*/
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sk_sp<SkTypeface> create_portable_typeface(const char* name, SkFontStyle style);
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static inline sk_sp<SkTypeface> create_portable_typeface() {
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return create_portable_typeface(nullptr, SkFontStyle());
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}
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void get_text_path(const SkFont&, const void* text, size_t length, SkTextEncoding, SkPath*,
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const SkPoint* positions = nullptr);
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/**
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* Call writePixels() by using the pixels from bitmap, but with an info that claims
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* the pixels are colorType + alphaType
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*/
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void write_pixels(SkCanvas*, const SkBitmap&, int x, int y, SkColorType, SkAlphaType);
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void write_pixels(SkSurface*, const SkBitmap&, int x, int y, SkColorType, SkAlphaType);
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/**
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* Returns true iff all of the pixels between the two images are identical.
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*
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* If the configs differ, return false.
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*/
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bool equal_pixels(const SkPixmap&, const SkPixmap&);
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bool equal_pixels(const SkBitmap&, const SkBitmap&);
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bool equal_pixels(const SkImage* a, const SkImage* b);
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/** Returns a newly created CheckerboardShader. */
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sk_sp<SkShader> create_checkerboard_shader(SkColor c1, SkColor c2, int size);
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/** Draw a checkerboard pattern in the current canvas, restricted to
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the current clip, using SkXfermode::kSrc_Mode. */
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void draw_checkerboard(SkCanvas* canvas,
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SkColor color1,
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SkColor color2,
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int checkSize);
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/** Make it easier to create a bitmap-based checkerboard */
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SkBitmap create_checkerboard_bitmap(int w, int h,
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SkColor c1, SkColor c2,
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int checkSize);
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/** A default checkerboard. */
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inline void draw_checkerboard(SkCanvas* canvas) {
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sk_tool_utils::draw_checkerboard(canvas, 0xFF999999, 0xFF666666, 8);
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}
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SkBitmap create_string_bitmap(int w, int h, SkColor c, int x, int y,
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int textSize, const char* str);
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// If the canvas does't make a surface (e.g. recording), make a raster surface
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sk_sp<SkSurface> makeSurface(SkCanvas*, const SkImageInfo&, const SkSurfaceProps* = nullptr);
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// A helper for inserting a drawtext call into a SkTextBlobBuilder
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void add_to_text_blob_w_len(SkTextBlobBuilder*, const char* text, size_t len, SkTextEncoding,
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const SkFont&, SkScalar x, SkScalar y);
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void add_to_text_blob(SkTextBlobBuilder*, const char* text, const SkFont&,
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SkScalar x, SkScalar y);
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// Constructs a star by walking a 'numPts'-sided regular polygon with even/odd fill:
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//
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// moveTo(pts[0]);
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// lineTo(pts[step % numPts]);
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// ...
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// lineTo(pts[(step * (N - 1)) % numPts]);
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//
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// numPts=5, step=2 will produce a classic five-point star.
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//
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// numPts and step must be co-prime.
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SkPath make_star(const SkRect& bounds, int numPts = 5, int step = 2);
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void create_hemi_normal_map(SkBitmap* bm, const SkIRect& dst);
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void create_frustum_normal_map(SkBitmap* bm, const SkIRect& dst);
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void create_tetra_normal_map(SkBitmap* bm, const SkIRect& dst);
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void make_big_path(SkPath& path);
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// A helper object to test the topological sorting code (TopoSortBench.cpp & TopoSortTest.cpp)
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class TopoTestNode : public SkRefCnt {
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public:
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TopoTestNode(int id) : fID(id), fOutputPos(-1), fTempMark(false) { }
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void dependsOn(TopoTestNode* src) {
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*fDependencies.append() = src;
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}
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int id() const { return fID; }
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void reset() { fOutputPos = -1; }
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int outputPos() const { return fOutputPos; }
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// check that the topological sort is valid for this node
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bool check() {
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if (-1 == fOutputPos) {
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return false;
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}
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for (int i = 0; i < fDependencies.count(); ++i) {
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if (-1 == fDependencies[i]->outputPos()) {
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return false;
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}
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// This node should've been output after all the nodes on which it depends
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if (fOutputPos < fDependencies[i]->outputPos()) {
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return false;
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}
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}
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return true;
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}
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// The following 7 methods are needed by the topological sort
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static void SetTempMark(TopoTestNode* node) { node->fTempMark = true; }
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static void ResetTempMark(TopoTestNode* node) { node->fTempMark = false; }
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static bool IsTempMarked(TopoTestNode* node) { return node->fTempMark; }
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static void Output(TopoTestNode* node, int outputPos) {
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SkASSERT(-1 != outputPos);
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node->fOutputPos = outputPos;
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}
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static bool WasOutput(TopoTestNode* node) { return (-1 != node->fOutputPos); }
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static int NumDependencies(TopoTestNode* node) { return node->fDependencies.count(); }
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static TopoTestNode* Dependency(TopoTestNode* node, int index) {
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return node->fDependencies[index];
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}
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// Helper functions for TopoSortBench & TopoSortTest
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static void AllocNodes(SkTArray<sk_sp<sk_tool_utils::TopoTestNode>>* graph, int num) {
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graph->reserve(num);
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for (int i = 0; i < num; ++i) {
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graph->push_back(sk_sp<TopoTestNode>(new TopoTestNode(i)));
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}
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}
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#ifdef SK_DEBUG
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static void Print(const SkTArray<TopoTestNode*>& graph) {
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for (int i = 0; i < graph.count(); ++i) {
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SkDebugf("%d, ", graph[i]->id());
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}
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SkDebugf("\n");
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}
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#endif
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// randomize the array
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static void Shuffle(SkTArray<sk_sp<TopoTestNode>>* graph, SkRandom* rand) {
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for (int i = graph->count()-1; i > 0; --i) {
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int swap = rand->nextU() % (i+1);
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(*graph)[i].swap((*graph)[swap]);
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}
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}
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private:
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int fID;
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int fOutputPos;
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bool fTempMark;
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SkTDArray<TopoTestNode*> fDependencies;
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};
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template <typename T>
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inline bool EncodeImageToFile(const char* path, const T& src, SkEncodedImageFormat f, int q) {
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SkFILEWStream file(path);
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return file.isValid() && SkEncodeImage(&file, src, f, q);
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}
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bool copy_to(SkBitmap* dst, SkColorType dstCT, const SkBitmap& src);
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void copy_to_g8(SkBitmap* dst, const SkBitmap& src);
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} // namespace sk_tool_utils
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#endif // sk_tool_utils_DEFINED
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