/*
* 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 "SkBitmap.h"
#include "SkCanvas.h"
#include "SkColorPriv.h"
#include "SkGradientShader.h"
#include "SkRect.h"
#include "Test.h"
// these are in the same order as the SkColorType enum
static const char* gColorTypeName[] = {
"None", "A8", "565", "4444", "RGBA", "BGRA", "Index8"
};
/** Returns -1 on success, else the x coord of the first bad pixel, return its
value in bad
*/
typedef int (*Proc)(const void*, int width, uint32_t expected, uint32_t* bad);
static int proc_32(const void* ptr, int w, uint32_t expected, uint32_t* bad) {
const SkPMColor* addr = static_cast<const SkPMColor*>(ptr);
for (int x = 0; x < w; x++) {
if (addr[x] != expected) {
*bad = addr[x];
return x;
}
}
return -1;
}
static int proc_16(const void* ptr, int w, uint32_t expected, uint32_t* bad) {
const uint16_t* addr = static_cast<const uint16_t*>(ptr);
for (int x = 0; x < w; x++) {
if (addr[x] != expected) {
*bad = addr[x];
return x;
}
}
return -1;
}
static int proc_8(const void* ptr, int w, uint32_t expected, uint32_t* bad) {
const SkPMColor* addr = static_cast<const SkPMColor*>(ptr);
for (int x = 0; x < w; x++) {
if (SkGetPackedA32(addr[x]) != expected) {
*bad = SkGetPackedA32(addr[x]);
return x;
}
}
return -1;
}
static int proc_bad(const void*, int, uint32_t, uint32_t* bad) {
*bad = 0;
return 0;
}
static Proc find_proc(const SkBitmap& bm, SkPMColor expect32, uint16_t expect16,
uint8_t expect8, uint32_t* expect) {
switch (bm.colorType()) {
case kN32_SkColorType:
*expect = expect32;
return proc_32;
case kARGB_4444_SkColorType:
case kRGB_565_SkColorType:
*expect = expect16;
return proc_16;
case kAlpha_8_SkColorType:
*expect = expect8;
return proc_8;
default:
*expect = 0;
return proc_bad;
}
}
static bool check_color(const SkBitmap& bm, SkPMColor expect32,
uint16_t expect16, uint8_t expect8,
skiatest::Reporter* reporter) {
uint32_t expect;
Proc proc = find_proc(bm, expect32, expect16, expect8, &expect);
for (int y = 0; y < bm.height(); y++) {
uint32_t bad;
int x = proc(bm.getAddr(0, y), bm.width(), expect, &bad);
if (x >= 0) {
ERRORF(reporter, "BlitRow colortype=%s [%d %d] expected %x got %x",
gColorTypeName[bm.colorType()], x, y, expect, bad);
return false;
}
}
return true;
}
// Make sure our blits always map src==0 to a noop, and src==FF to full opaque
static void test_00_FF(skiatest::Reporter* reporter) {
static const int W = 256;
static const SkColorType gDstColorType[] = {
kN32_SkColorType,
kRGB_565_SkColorType,
};
static const struct {
SkColor fSrc;
SkColor fDst;
SkPMColor fResult32;
uint16_t fResult16;
uint8_t fResult8;
} gSrcRec[] = {
{ 0, 0, 0, 0, 0 },
{ 0, 0xFFFFFFFF, SkPackARGB32(0xFF, 0xFF, 0xFF, 0xFF), 0xFFFF, 0xFF },
{ 0xFFFFFFFF, 0, SkPackARGB32(0xFF, 0xFF, 0xFF, 0xFF), 0xFFFF, 0xFF },
{ 0xFFFFFFFF, 0xFFFFFFFF, SkPackARGB32(0xFF, 0xFF, 0xFF, 0xFF), 0xFFFF, 0xFF },
};
SkPaint paint;
SkBitmap srcBM;
srcBM.allocN32Pixels(W, 1);
for (size_t i = 0; i < SK_ARRAY_COUNT(gDstColorType); i++) {
SkImageInfo info = SkImageInfo::Make(W, 1, gDstColorType[i],
kPremul_SkAlphaType);
SkBitmap dstBM;
dstBM.allocPixels(info);
SkCanvas canvas(dstBM);
for (size_t j = 0; j < SK_ARRAY_COUNT(gSrcRec); j++) {
srcBM.eraseColor(gSrcRec[j].fSrc);
dstBM.eraseColor(gSrcRec[j].fDst);
for (int k = 0; k < 4; k++) {
bool dither = (k & 1) != 0;
bool blend = (k & 2) != 0;
if (gSrcRec[j].fSrc != 0 && blend) {
// can't make a numerical promise about blending anything
// but 0
// continue;
}
paint.setDither(dither);
paint.setAlpha(blend ? 0x80 : 0xFF);
canvas.drawBitmap(srcBM, 0, 0, &paint);
if (!check_color(dstBM, gSrcRec[j].fResult32, gSrcRec[j].fResult16,
gSrcRec[j].fResult8, reporter)) {
SkDebugf("--- src index %d dither %d blend %d\n", j, dither, blend);
}
}
}
}
}
///////////////////////////////////////////////////////////////////////////////
struct Mesh {
SkPoint fPts[4];
Mesh(const SkBitmap& bm, SkPaint* paint) {
const SkScalar w = SkIntToScalar(bm.width());
const SkScalar h = SkIntToScalar(bm.height());
fPts[0].set(0, 0);
fPts[1].set(w, 0);
fPts[2].set(w, h);
fPts[3].set(0, h);
SkShader* s = SkShader::CreateBitmapShader(bm, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode);
paint->setShader(s)->unref();
}
void draw(SkCanvas* canvas, SkPaint* paint) {
canvas->drawVertices(SkCanvas::kTriangleFan_VertexMode, 4, fPts, fPts,
NULL, NULL, NULL, 0, *paint);
}
};
#include "SkImageEncoder.h"
static void save_bm(const SkBitmap& bm, const char name[]) {
SkImageEncoder::EncodeFile(name, bm, SkImageEncoder::kPNG_Type, 100);
}
static bool gOnce;
// Make sure our blits are invariant with the width of the blit (i.e. that
// special case for 8 at a time have the same results as narrower blits)
static void test_diagonal(skiatest::Reporter* reporter) {
static const int W = 64;
static const int H = W;
static const SkColorType gDstColorType[] = {
kN32_SkColorType,
kRGB_565_SkColorType,
};
static const SkColor gDstBG[] = { 0, 0xFFFFFFFF };
SkPaint paint;
SkBitmap srcBM;
srcBM.allocN32Pixels(W, H);
SkRect srcR = {
0, 0, SkIntToScalar(srcBM.width()), SkIntToScalar(srcBM.height()) };
// cons up a mesh to draw the bitmap with
Mesh mesh(srcBM, &paint);
SkImageInfo info = SkImageInfo::Make(W, H, kUnknown_SkColorType,
kPremul_SkAlphaType);
for (size_t i = 0; i < SK_ARRAY_COUNT(gDstColorType); i++) {
info = info.makeColorType(gDstColorType[i]);
SkBitmap dstBM0, dstBM1;
dstBM0.allocPixels(info);
dstBM1.allocPixels(info);
SkCanvas canvas0(dstBM0);
SkCanvas canvas1(dstBM1);
SkColor bgColor;
for (size_t j = 0; j < SK_ARRAY_COUNT(gDstBG); j++) {
bgColor = gDstBG[j];
for (int c = 0; c <= 0xFF; c++) {
srcBM.eraseARGB(0xFF, c, c, c);
for (int k = 0; k < 4; k++) {
bool dither = (k & 1) != 0;
uint8_t alpha = (k & 2) ? 0x80 : 0xFF;
paint.setDither(dither);
paint.setAlpha(alpha);
dstBM0.eraseColor(bgColor);
dstBM1.eraseColor(bgColor);
canvas0.drawRect(srcR, paint);
mesh.draw(&canvas1, &paint);
if (!gOnce && false) {
save_bm(dstBM0, "drawBitmap.png");
save_bm(dstBM1, "drawMesh.png");
gOnce = true;
}
if (memcmp(dstBM0.getPixels(), dstBM1.getPixels(), dstBM0.getSize())) {
ERRORF(reporter, "Diagonal colortype=%s bg=0x%x dither=%d"
" alpha=0x%x src=0x%x",
gColorTypeName[gDstColorType[i]], bgColor, dither,
alpha, c);
}
}
}
}
}
}
DEF_TEST(BlitRow, reporter) {
test_00_FF(reporter);
test_diagonal(reporter);
}