static void doDraw(SkCanvas* canvas, SkPaint* paint, const int isrc[],
const int idst[], int count) {
SkMatrix matrix;
SkPoint src[4], dst[4];
for (int i = 0; i < count; i++) {
src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1]));
dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1]));
}
canvas->save();
matrix.setPolyToPoly(src, dst, count);
canvas->concat(matrix);
paint->setColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
paint->setStyle(SkPaint::kStroke_Style);
const SkScalar D = 64;
canvas->drawRect(SkRect::MakeWH(D, D), *paint);
canvas->drawLine(0, 0, D, D, *paint);
canvas->drawLine(0, D, D, 0, *paint);
SkPaint::FontMetrics fm;
paint->getFontMetrics(&fm);
paint->setColor(SK_ColorRED);
paint->setStyle(SkPaint::kFill_Style);
SkScalar x = D/2;
SkScalar y = D/2 - (fm.fAscent + fm.fDescent)/2;
uint16_t glyphID = 3; // X
canvas->drawText((void*) &glyphID, sizeof(glyphID), x, y, *paint);
canvas->restore();
}
Boolean Matrix::NativeSetPolyToPoly(
/* [in] */ Int64 nObj,
/* [in] */ ArrayOf<Float>* _src,
/* [in] */ Int32 srcIndex,
/* [out] */ ArrayOf<Float>* _dst,
/* [in] */ Int32 dstIndex,
/* [in] */ Int32 ptCount)
{
SkASSERT(srcIndex >= 0);
SkASSERT(dstIndex >= 0);
SkASSERT(ptCount <= 4);
SkASSERT(_src->GetLength() >= srcIndex + (ptCount << 1));
SkASSERT(_dst->GetLength() >= dstIndex + (ptCount << 1));
SkMatrix* matrix = reinterpret_cast<SkMatrix*>(nObj);
SkASSERT(srcIndex >= 0);
SkASSERT(dstIndex >= 0);
SkASSERT((unsigned)ptCount <= 4);
// AutoJavaFloatArray autoSrc(env, jsrc, srcIndex + (ptCount << 1), kRO_JNIAccess);
// AutoJavaFloatArray autoDst(env, jdst, dstIndex + (ptCount << 1), kRW_JNIAccess);
Float* src = _src->GetPayload() + srcIndex;
Float* dst = _dst->GetPayload() + dstIndex;
bool result;
#ifdef SK_SCALAR_IS_FLOAT
result = matrix->setPolyToPoly((const SkPoint*)src, (const SkPoint*)dst,
ptCount);
#else
SkASSERT(FALSE);
#endif
return result ? TRUE : FALSE;
}
static void doDraw(SkCanvas* canvas, SkPaint* paint, const int isrc[],
const int idst[], int count) {
SkMatrix matrix;
SkPoint src[4], dst[4];
for (int i = 0; i < count; i++) {
src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1]));
dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1]));
}
canvas->save();
matrix.setPolyToPoly(src, dst, count);
canvas->concat(matrix);
paint->setColor(SK_ColorGRAY);
paint->setStyle(SkPaint::kStroke_Style);
const SkScalar D = SkIntToScalar(64);
canvas->drawRectCoords(0, 0, D, D, *paint);
canvas->drawLine(0, 0, D, D, *paint);
canvas->drawLine(0, D, D, 0, *paint);
SkPaint::FontMetrics fm;
paint->getFontMetrics(&fm);
paint->setColor(SK_ColorRED);
paint->setStyle(SkPaint::kFill_Style);
SkScalar x = D/2;
float y = D/2 - (fm.fAscent + fm.fDescent)/2;
SkString str;
str.appendS32(count);
canvas->drawText(str.c_str(), str.size(),
x, y,
*paint);
canvas->restore();
}
void draw(SkCanvas* canvas) {
SkMatrix matrix;
SkPoint bitmapBounds[4], perspect[4] = {{50, 10}, {180, 40}, {236, 176}, {10, 206}};
SkRect::Make(source.bounds()).toQuad(bitmapBounds);
matrix.setPolyToPoly(bitmapBounds, perspect, 4);
matrix.preScale(.75f, 1.5f, source.width() / 2, source.height() / 2);
canvas->concat(matrix);
canvas->drawBitmap(source, 0, 0);
}
static jboolean setPolyToPoly(JNIEnv* env, jobject clazz, jlong matrixHandle,
jfloatArray jsrc, jint srcIndex,
jfloatArray jdst, jint dstIndex, jint ptCount) {
SkMatrix* matrix = reinterpret_cast<SkMatrix*>(matrixHandle);
SkASSERT(srcIndex >= 0);
SkASSERT(dstIndex >= 0);
SkASSERT((unsigned)ptCount <= 4);
AutoJavaFloatArray autoSrc(env, jsrc, srcIndex + (ptCount << 1), kRO_JNIAccess);
AutoJavaFloatArray autoDst(env, jdst, dstIndex + (ptCount << 1), kRW_JNIAccess);
float* src = autoSrc.ptr() + srcIndex;
float* dst = autoDst.ptr() + dstIndex;
bool result;
#ifdef SK_SCALAR_IS_FLOAT
result = matrix->setPolyToPoly((const SkPoint*)src, (const SkPoint*)dst,
ptCount);
#else
SkASSERT(false);
#endif
return result ? JNI_TRUE : JNI_FALSE;
}