зеркало из https://github.com/mozilla/moz-skia.git
443 строки
15 KiB
C++
443 строки
15 KiB
C++
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/*
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* Copyright 2011 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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#include "Test.h"
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#include "SkCanvas.h"
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#include "SkColorPriv.h"
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#include "SkDevice.h"
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#include "SkMathPriv.h"
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#include "SkRegion.h"
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#if SK_SUPPORT_GPU
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#include "SkGpuDevice.h"
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#else
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class GrContext;
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#endif
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static const int DEV_W = 100, DEV_H = 100;
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static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H);
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static const SkRect DEV_RECT_S = SkRect::MakeWH(DEV_W * SK_Scalar1,
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DEV_H * SK_Scalar1);
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static const U8CPU DEV_PAD = 0xee;
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namespace {
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SkPMColor getCanvasColor(int x, int y) {
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SkASSERT(x >= 0 && x < DEV_W);
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SkASSERT(y >= 0 && y < DEV_H);
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U8CPU r = x;
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U8CPU g = y;
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U8CPU b = 0xc;
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U8CPU a = 0x0;
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switch ((x+y) % 5) {
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case 0:
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a = 0xff;
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break;
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case 1:
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a = 0x80;
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break;
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case 2:
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a = 0xCC;
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break;
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case 3:
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a = 0x00;
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break;
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case 4:
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a = 0x01;
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break;
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}
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return SkPremultiplyARGBInline(a, r, g, b);
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}
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bool config8888IsPremul(SkCanvas::Config8888 config8888) {
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switch (config8888) {
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case SkCanvas::kNative_Premul_Config8888:
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case SkCanvas::kBGRA_Premul_Config8888:
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case SkCanvas::kRGBA_Premul_Config8888:
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return true;
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case SkCanvas::kNative_Unpremul_Config8888:
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case SkCanvas::kBGRA_Unpremul_Config8888:
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case SkCanvas::kRGBA_Unpremul_Config8888:
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return false;
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default:
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SkASSERT(0);
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return false;
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}
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}
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// assumes any premu/.unpremul has been applied
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uint32_t packConfig8888(SkCanvas::Config8888 config8888,
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U8CPU a, U8CPU r, U8CPU g, U8CPU b) {
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uint32_t r32;
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uint8_t* result = reinterpret_cast<uint8_t*>(&r32);
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switch (config8888) {
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case SkCanvas::kNative_Premul_Config8888:
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case SkCanvas::kNative_Unpremul_Config8888:
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r32 = SkPackARGB32NoCheck(a, r, g, b);
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break;
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case SkCanvas::kBGRA_Premul_Config8888:
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case SkCanvas::kBGRA_Unpremul_Config8888:
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result[0] = b;
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result[1] = g;
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result[2] = r;
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result[3] = a;
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break;
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case SkCanvas::kRGBA_Premul_Config8888:
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case SkCanvas::kRGBA_Unpremul_Config8888:
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result[0] = r;
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result[1] = g;
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result[2] = b;
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result[3] = a;
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break;
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default:
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SkASSERT(0);
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return 0;
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}
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return r32;
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}
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uint32_t getBitmapColor(int x, int y, int w, int h, SkCanvas::Config8888 config8888) {
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int n = y * w + x;
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U8CPU b = n & 0xff;
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U8CPU g = (n >> 8) & 0xff;
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U8CPU r = (n >> 16) & 0xff;
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U8CPU a = 0;
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switch ((x+y) % 5) {
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case 4:
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a = 0xff;
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break;
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case 3:
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a = 0x80;
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break;
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case 2:
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a = 0xCC;
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break;
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case 1:
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a = 0x01;
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break;
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case 0:
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a = 0x00;
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break;
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}
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if (config8888IsPremul(config8888)) {
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r = SkMulDiv255Ceiling(r, a);
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g = SkMulDiv255Ceiling(g, a);
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b = SkMulDiv255Ceiling(b, a);
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}
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return packConfig8888(config8888, a, r, g , b);
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}
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void fillCanvas(SkCanvas* canvas) {
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static SkBitmap bmp;
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if (bmp.isNull()) {
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bmp.setConfig(SkBitmap::kARGB_8888_Config, DEV_W, DEV_H);
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bool alloc = bmp.allocPixels();
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SkASSERT(alloc);
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SkAutoLockPixels alp(bmp);
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intptr_t pixels = reinterpret_cast<intptr_t>(bmp.getPixels());
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for (int y = 0; y < DEV_H; ++y) {
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for (int x = 0; x < DEV_W; ++x) {
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SkPMColor* pixel = reinterpret_cast<SkPMColor*>(pixels + y * bmp.rowBytes() + x * bmp.bytesPerPixel());
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*pixel = getCanvasColor(x, y);
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}
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}
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}
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canvas->save();
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canvas->setMatrix(SkMatrix::I());
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canvas->clipRect(DEV_RECT_S, SkRegion::kReplace_Op);
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SkPaint paint;
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paint.setXfermodeMode(SkXfermode::kSrc_Mode);
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canvas->drawBitmap(bmp, 0, 0, &paint);
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canvas->restore();
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}
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SkPMColor convertConfig8888ToPMColor(SkCanvas::Config8888 config8888,
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uint32_t color,
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bool* premul) {
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const uint8_t* c = reinterpret_cast<uint8_t*>(&color);
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U8CPU a,r,g,b;
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*premul = false;
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switch (config8888) {
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case SkCanvas::kNative_Premul_Config8888:
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return color;
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case SkCanvas::kNative_Unpremul_Config8888:
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*premul = true;
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a = SkGetPackedA32(color);
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r = SkGetPackedR32(color);
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g = SkGetPackedG32(color);
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b = SkGetPackedB32(color);
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break;
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case SkCanvas::kBGRA_Unpremul_Config8888:
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*premul = true; // fallthru
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case SkCanvas::kBGRA_Premul_Config8888:
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a = static_cast<U8CPU>(c[3]);
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r = static_cast<U8CPU>(c[2]);
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g = static_cast<U8CPU>(c[1]);
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b = static_cast<U8CPU>(c[0]);
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break;
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case SkCanvas::kRGBA_Unpremul_Config8888:
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*premul = true; // fallthru
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case SkCanvas::kRGBA_Premul_Config8888:
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a = static_cast<U8CPU>(c[3]);
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r = static_cast<U8CPU>(c[0]);
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g = static_cast<U8CPU>(c[1]);
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b = static_cast<U8CPU>(c[2]);
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break;
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default:
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SkDEBUGFAIL("Unexpected Config8888");
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break;
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}
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if (*premul) {
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r = SkMulDiv255Ceiling(r, a);
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g = SkMulDiv255Ceiling(g, a);
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b = SkMulDiv255Ceiling(b, a);
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}
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return SkPackARGB32(a, r, g, b);
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}
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bool checkPixel(SkPMColor a, SkPMColor b, bool didPremulConversion) {
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if (!didPremulConversion) {
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return a == b;
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}
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int32_t aA = static_cast<int32_t>(SkGetPackedA32(a));
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int32_t aR = static_cast<int32_t>(SkGetPackedR32(a));
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int32_t aG = static_cast<int32_t>(SkGetPackedG32(a));
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int32_t aB = SkGetPackedB32(a);
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int32_t bA = static_cast<int32_t>(SkGetPackedA32(b));
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int32_t bR = static_cast<int32_t>(SkGetPackedR32(b));
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int32_t bG = static_cast<int32_t>(SkGetPackedG32(b));
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int32_t bB = static_cast<int32_t>(SkGetPackedB32(b));
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return aA == bA &&
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SkAbs32(aR - bR) <= 1 &&
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SkAbs32(aG - bG) <= 1 &&
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SkAbs32(aB - bB) <= 1;
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}
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bool checkWrite(skiatest::Reporter* reporter,
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SkCanvas* canvas,
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const SkBitmap& bitmap,
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int writeX, int writeY,
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SkCanvas::Config8888 config8888) {
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SkDevice* dev = canvas->getDevice();
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if (!dev) {
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return false;
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}
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SkBitmap devBmp = dev->accessBitmap(false);
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if (devBmp.width() != DEV_W ||
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devBmp.height() != DEV_H ||
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devBmp.config() != SkBitmap::kARGB_8888_Config ||
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devBmp.isNull()) {
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return false;
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}
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SkAutoLockPixels alp(devBmp);
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intptr_t canvasPixels = reinterpret_cast<intptr_t>(devBmp.getPixels());
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size_t canvasRowBytes = devBmp.rowBytes();
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SkIRect writeRect = SkIRect::MakeXYWH(writeX, writeY, bitmap.width(), bitmap.height());
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for (int cy = 0; cy < DEV_H; ++cy) {
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const SkPMColor* canvasRow = reinterpret_cast<const SkPMColor*>(canvasPixels);
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for (int cx = 0; cx < DEV_W; ++cx) {
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SkPMColor canvasPixel = canvasRow[cx];
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if (writeRect.contains(cx, cy)) {
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int bx = cx - writeX;
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int by = cy - writeY;
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uint32_t bmpColor8888 = getBitmapColor(bx, by, bitmap.width(), bitmap.height(), config8888);
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bool mul;
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SkPMColor bmpPMColor = convertConfig8888ToPMColor(config8888, bmpColor8888, &mul);
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bool check;
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REPORTER_ASSERT(reporter, check = checkPixel(bmpPMColor, canvasPixel, mul));
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if (!check) {
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return false;
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}
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} else {
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bool check;
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SkPMColor testColor = getCanvasColor(cx, cy);
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REPORTER_ASSERT(reporter, check = (canvasPixel == testColor));
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if (!check) {
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return false;
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}
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}
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}
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if (cy != DEV_H -1) {
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const char* pad = reinterpret_cast<const char*>(canvasPixels + 4 * DEV_W);
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for (size_t px = 0; px < canvasRowBytes - 4 * DEV_W; ++px) {
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bool check;
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REPORTER_ASSERT(reporter, check = (pad[px] == static_cast<char>(DEV_PAD)));
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if (!check) {
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return false;
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}
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}
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}
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canvasPixels += canvasRowBytes;
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}
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return true;
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}
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enum DevType {
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kRaster_DevType,
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#if SK_SUPPORT_GPU
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kGpu_DevType,
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#endif
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};
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struct CanvasConfig {
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DevType fDevType;
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bool fTightRowBytes;
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};
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static const CanvasConfig gCanvasConfigs[] = {
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{kRaster_DevType, true},
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{kRaster_DevType, false},
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#if SK_SUPPORT_GPU && defined(SK_SCALAR_IS_FLOAT)
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{kGpu_DevType, true}, // row bytes has no meaning on gpu devices
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#endif
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};
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bool setupCanvas(SkCanvas* canvas, const CanvasConfig& c, GrContext* grCtx) {
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switch (c.fDevType) {
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case kRaster_DevType: {
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SkBitmap bmp;
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size_t rowBytes = c.fTightRowBytes ? 0 : 4 * DEV_W + 100;
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bmp.setConfig(SkBitmap::kARGB_8888_Config, DEV_W, DEV_H, rowBytes);
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if (!bmp.allocPixels()) {
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return false;
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}
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// if rowBytes isn't tight then set the padding to a known value
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if (rowBytes) {
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SkAutoLockPixels alp(bmp);
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memset(bmp.getPixels(), DEV_PAD, bmp.getSafeSize());
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}
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canvas->setDevice(new SkDevice(bmp))->unref();
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break;
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}
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#if SK_SUPPORT_GPU
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case kGpu_DevType:
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canvas->setDevice(new SkGpuDevice(grCtx,
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SkBitmap::kARGB_8888_Config,
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DEV_W, DEV_H))->unref();
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break;
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#endif
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}
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return true;
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}
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bool setupBitmap(SkBitmap* bitmap,
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SkCanvas::Config8888 config8888,
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int w, int h,
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bool tightRowBytes) {
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size_t rowBytes = tightRowBytes ? 0 : 4 * w + 60;
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bitmap->setConfig(SkBitmap::kARGB_8888_Config, w, h, rowBytes);
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if (!bitmap->allocPixels()) {
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return false;
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}
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SkAutoLockPixels alp(*bitmap);
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intptr_t pixels = reinterpret_cast<intptr_t>(bitmap->getPixels());
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for (int y = 0; y < h; ++y) {
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for (int x = 0; x < w; ++x) {
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uint32_t* pixel = reinterpret_cast<uint32_t*>(pixels + y * bitmap->rowBytes() + x * 4);
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*pixel = getBitmapColor(x, y, w, h, config8888);
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}
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}
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return true;
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}
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void WritePixelsTest(skiatest::Reporter* reporter, GrContext* context) {
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SkCanvas canvas;
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const SkIRect testRects[] = {
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// entire thing
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DEV_RECT,
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// larger on all sides
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SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H + 10),
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// fully contained
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SkIRect::MakeLTRB(DEV_W / 4, DEV_H / 4, 3 * DEV_W / 4, 3 * DEV_H / 4),
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// outside top left
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SkIRect::MakeLTRB(-10, -10, -1, -1),
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// touching top left corner
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SkIRect::MakeLTRB(-10, -10, 0, 0),
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// overlapping top left corner
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SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H / 4),
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// overlapping top left and top right corners
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SkIRect::MakeLTRB(-10, -10, DEV_W + 10, DEV_H / 4),
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// touching entire top edge
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SkIRect::MakeLTRB(-10, -10, DEV_W + 10, 0),
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// overlapping top right corner
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SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H / 4),
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// contained in x, overlapping top edge
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SkIRect::MakeLTRB(DEV_W / 4, -10, 3 * DEV_W / 4, DEV_H / 4),
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// outside top right corner
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SkIRect::MakeLTRB(DEV_W + 1, -10, DEV_W + 10, -1),
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// touching top right corner
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SkIRect::MakeLTRB(DEV_W, -10, DEV_W + 10, 0),
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// overlapping top left and bottom left corners
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SkIRect::MakeLTRB(-10, -10, DEV_W / 4, DEV_H + 10),
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// touching entire left edge
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SkIRect::MakeLTRB(-10, -10, 0, DEV_H + 10),
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// overlapping bottom left corner
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SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W / 4, DEV_H + 10),
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// contained in y, overlapping left edge
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SkIRect::MakeLTRB(-10, DEV_H / 4, DEV_W / 4, 3 * DEV_H / 4),
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// outside bottom left corner
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SkIRect::MakeLTRB(-10, DEV_H + 1, -1, DEV_H + 10),
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// touching bottom left corner
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SkIRect::MakeLTRB(-10, DEV_H, 0, DEV_H + 10),
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// overlapping bottom left and bottom right corners
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SkIRect::MakeLTRB(-10, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10),
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// touching entire left edge
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SkIRect::MakeLTRB(0, DEV_H, DEV_W, DEV_H + 10),
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// overlapping bottom right corner
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SkIRect::MakeLTRB(3 * DEV_W / 4, 3 * DEV_H / 4, DEV_W + 10, DEV_H + 10),
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// overlapping top right and bottom right corners
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SkIRect::MakeLTRB(3 * DEV_W / 4, -10, DEV_W + 10, DEV_H + 10),
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(gCanvasConfigs); ++i) {
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REPORTER_ASSERT(reporter, setupCanvas(&canvas, gCanvasConfigs[i], context));
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static const SkCanvas::Config8888 gSrcConfigs[] = {
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SkCanvas::kNative_Premul_Config8888,
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SkCanvas::kNative_Unpremul_Config8888,
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SkCanvas::kBGRA_Premul_Config8888,
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SkCanvas::kBGRA_Unpremul_Config8888,
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SkCanvas::kRGBA_Premul_Config8888,
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SkCanvas::kRGBA_Unpremul_Config8888,
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};
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for (size_t r = 0; r < SK_ARRAY_COUNT(testRects); ++r) {
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const SkIRect& rect = testRects[r];
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for (int tightBmp = 0; tightBmp < 2; ++tightBmp) {
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for (size_t c = 0; c < SK_ARRAY_COUNT(gSrcConfigs); ++c) {
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fillCanvas(&canvas);
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SkCanvas::Config8888 config8888 = gSrcConfigs[c];
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SkBitmap bmp;
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REPORTER_ASSERT(reporter, setupBitmap(&bmp, config8888, rect.width(), rect.height(), SkToBool(tightBmp)));
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uint32_t idBefore = canvas.getDevice()->accessBitmap(false).getGenerationID();
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canvas.writePixels(bmp, rect.fLeft, rect.fTop, config8888);
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uint32_t idAfter = canvas.getDevice()->accessBitmap(false).getGenerationID();
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REPORTER_ASSERT(reporter, checkWrite(reporter, &canvas, bmp, rect.fLeft, rect.fTop, config8888));
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// we should change the genID iff pixels were actually written.
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SkIRect canvasRect = SkIRect::MakeSize(canvas.getDeviceSize());
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SkIRect writeRect = SkIRect::MakeXYWH(rect.fLeft, rect.fTop,
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bmp.width(), bmp.height());
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bool intersects = SkIRect::Intersects(canvasRect, writeRect) ;
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REPORTER_ASSERT(reporter, intersects == (idBefore != idAfter));
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}
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}
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}
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}
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}
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}
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#ifndef SK_BUILD_FOR_ANDROID
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#include "TestClassDef.h"
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DEFINE_GPUTESTCLASS("WritePixels", WritePixelsTestClass, WritePixelsTest)
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#endif
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