/*
* 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 "gm.h"
#include "SkCanvas.h"
#include "SkColorFilterImageFilter.h"
#include "SkGradientShader.h"
#include "SkTableColorFilter.h"
static SkShader* make_shader0(int w, int h) {
SkPoint pts[] = { {0, 0}, {SkIntToScalar(w), SkIntToScalar(h)} };
SkColor colors[] = {
SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN,
SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE
};
return SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors),
SkShader::kClamp_TileMode);
}
static void make_bm0(SkBitmap* bm) {
int W = 120;
int H = 120;
bm->allocN32Pixels(W, H);
bm->eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(*bm);
SkPaint paint;
paint.setShader(make_shader0(W, H))->unref();
canvas.drawPaint(paint);
}
static SkShader* make_shader1(int w, int h) {
SkScalar cx = SkIntToScalar(w)/2;
SkScalar cy = SkIntToScalar(h)/2;
SkColor colors[] = {
SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE,
};
return SkGradientShader::CreateRadial(SkPoint::Make(cx, cy), cx, colors, NULL,
SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode);
}
static void make_bm1(SkBitmap* bm) {
int W = 120;
int H = 120;
SkScalar cx = SkIntToScalar(W)/2;
SkScalar cy = SkIntToScalar(H)/2;
bm->allocN32Pixels(W, H);
bm->eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(*bm);
SkPaint paint;
paint.setShader(make_shader1(W, H))->unref();
paint.setAntiAlias(true);
canvas.drawCircle(cx, cy, cx, paint);
}
static void make_table0(uint8_t table[]) {
for (int i = 0; i < 256; ++i) {
int n = i >> 5;
table[i] = (n << 5) | (n << 2) | (n >> 1);
}
}
static void make_table1(uint8_t table[]) {
for (int i = 0; i < 256; ++i) {
table[i] = i * i / 255;
}
}
static void make_table2(uint8_t table[]) {
for (int i = 0; i < 256; ++i) {
float fi = i / 255.0f;
table[i] = static_cast<uint8_t>(sqrtf(fi) * 255);
}
}
static SkColorFilter* make_null_cf() {
return NULL;
}
static SkColorFilter* make_cf0() {
uint8_t table[256]; make_table0(table);
return SkTableColorFilter::Create(table);
}
static SkColorFilter* make_cf1() {
uint8_t table[256]; make_table1(table);
return SkTableColorFilter::Create(table);
}
static SkColorFilter* make_cf2() {
uint8_t table[256]; make_table2(table);
return SkTableColorFilter::Create(table);
}
static SkColorFilter* make_cf3() {
uint8_t table0[256]; make_table0(table0);
uint8_t table1[256]; make_table1(table1);
uint8_t table2[256]; make_table2(table2);
return SkTableColorFilter::CreateARGB(NULL, table0, table1, table2);
}
class TableColorFilterGM : public skiagm::GM {
public:
TableColorFilterGM() {}
protected:
virtual SkString onShortName() {
return SkString("tablecolorfilter");
}
virtual SkISize onISize() {
return SkISize::Make(700, 1650);
}
virtual void onDraw(SkCanvas* canvas) {
canvas->drawColor(0xFFDDDDDD);
canvas->translate(20, 20);
static SkColorFilter* (*gColorFilterMakers[])() = { make_null_cf, make_cf0, make_cf1,
make_cf2, make_cf3 };
static void (*gBitmapMakers[])(SkBitmap*) = { make_bm0, make_bm1 };
// This test will be done once for each bitmap with the results stacked vertically.
// For a single bitmap the resulting image will be the following:
// - A first line with the original bitmap, followed by the image drawn once
// with each of the N color filters
// - N lines of the bitmap drawn N times, this will cover all N*N combinations of
// pair of color filters in order to test the collpsing of consecutive table
// color filters.
//
// Here is a graphical representation of the result for 2 bitmaps and 2 filters
// with the number corresponding to the number of filters the bitmap goes through:
//
// --bitmap1
// 011
// 22
// 22
// --bitmap2
// 011
// 22
// 22
SkScalar x = 0, y = 0;
for (size_t bitmapMaker = 0; bitmapMaker < SK_ARRAY_COUNT(gBitmapMakers); ++bitmapMaker) {
SkBitmap bm;
gBitmapMakers[bitmapMaker](&bm);
SkScalar xOffset = SkScalar(bm.width() * 9 / 8);
SkScalar yOffset = SkScalar(bm.height() * 9 / 8);
// Draw the first element of the first line
x = 0;
SkPaint paint;
canvas->drawBitmap(bm, x, y, &paint);
// Draws the rest of the first line for this bitmap
// each draw being at xOffset of the previous one
for (unsigned i = 1; i < SK_ARRAY_COUNT(gColorFilterMakers); ++i) {
x += xOffset;
paint.setColorFilter(gColorFilterMakers[i]())->unref();
canvas->drawBitmap(bm, x, y, &paint);
}
paint.setColorFilter(NULL);
for (unsigned i = 0; i < SK_ARRAY_COUNT(gColorFilterMakers); ++i) {
SkAutoTUnref<SkColorFilter> colorFilter1(gColorFilterMakers[i]());
SkAutoTUnref<SkImageFilter> imageFilter1(SkColorFilterImageFilter::Create(
colorFilter1, NULL, NULL));
// Move down to the next line and draw it
// each draw being at xOffset of the previous one
y += yOffset;
x = 0;
for (unsigned j = 1; j < SK_ARRAY_COUNT(gColorFilterMakers); ++j) {
SkAutoTUnref<SkColorFilter> colorFilter2(gColorFilterMakers[j]());
SkAutoTUnref<SkImageFilter> imageFilter2(SkColorFilterImageFilter::Create(
colorFilter2, imageFilter1, NULL));
paint.setImageFilter(imageFilter2);
canvas->drawBitmap(bm, x, y, &paint);
x += xOffset;
}
}
// Move down one line to the beginning of the block for next bitmap
y += yOffset;
}
}
private:
typedef GM INHERITED;
};
DEF_GM( return new TableColorFilterGM; )
//////////////////////////////////////////////////////////////////////////////
class ComposeColorFilterGM : public skiagm::GM {
enum {
COLOR_COUNT = 3,
MODE_COUNT = 4,
};
const SkColor* fColors;
const SkXfermode::Mode* fModes;
SkString fName;
public:
ComposeColorFilterGM(const SkColor colors[], const SkXfermode::Mode modes[],
const char suffix[])
: fColors(colors), fModes(modes)
{
fName.printf("colorcomposefilter_%s", suffix);
}
protected:
virtual SkString onShortName() {
return fName;
}
virtual SkISize onISize() {
return SkISize::Make(790, 790);
}
virtual void onDraw(SkCanvas* canvas) {
SkBitmap bm;
make_bm1(&bm);
canvas->drawColor(0xFFDDDDDD);
const int MODES = MODE_COUNT * COLOR_COUNT;
SkAutoTUnref<SkColorFilter> filters[MODES];
int index = 0;
for (int i = 0; i < MODE_COUNT; ++i) {
for (int j = 0; j < COLOR_COUNT; ++j) {
filters[index++].reset(SkColorFilter::CreateModeFilter(fColors[j], fModes[i]));
}
}
SkPaint paint;
paint.setShader(make_shader1(50, 50))->unref();
SkRect r = SkRect::MakeWH(50, 50);
const SkScalar spacer = 10;
canvas->translate(spacer, spacer);
canvas->drawRect(r, paint); // orig
for (int i = 0; i < MODES; ++i) {
paint.setColorFilter(filters[i]);
canvas->save();
canvas->translate((i + 1) * (r.width() + spacer), 0);
canvas->drawRect(r, paint);
canvas->restore();
canvas->save();
canvas->translate(0, (i + 1) * (r.width() + spacer));
canvas->drawRect(r, paint);
canvas->restore();
}
canvas->translate(r.width() + spacer, r.width() + spacer);
for (int y = 0; y < MODES; ++y) {
canvas->save();
for (int x = 0; x < MODES; ++x) {
SkAutoTUnref<SkColorFilter> compose(SkColorFilter::CreateComposeFilter(filters[y],
filters[x]));
paint.setColorFilter(compose);
canvas->drawRect(r, paint);
canvas->translate(r.width() + spacer, 0);
}
canvas->restore();
canvas->translate(0, r.height() + spacer);
}
}
private:
typedef GM INHERITED;
};
const SkColor gColors0[] = { SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW };
const SkXfermode::Mode gModes0[] = {
SkXfermode::kOverlay_Mode,
SkXfermode::kDarken_Mode,
SkXfermode::kColorBurn_Mode,
SkXfermode::kExclusion_Mode,
};
DEF_GM( return new ComposeColorFilterGM(gColors0, gModes0, "wacky"); )
const SkColor gColors1[] = { 0x80FF0000, 0x8000FF00, 0x800000FF };
const SkXfermode::Mode gModes1[] = {
SkXfermode::kSrcOver_Mode,
SkXfermode::kXor_Mode,
SkXfermode::kDstOut_Mode,
SkXfermode::kSrcATop_Mode,
};
DEF_GM( return new ComposeColorFilterGM(gColors1, gModes1, "alpha"); )