| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "Matrix" |
| |
| #include <math.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <utils/Log.h> |
| |
| #include <SkMatrix.h> |
| |
| #include "Matrix.h" |
| |
| namespace android { |
| namespace uirenderer { |
| |
| void Matrix4::loadIdentity() { |
| mMat[0] = 1.0f; |
| mMat[1] = 0.0f; |
| mMat[2] = 0.0f; |
| mMat[3] = 0.0f; |
| |
| mMat[4] = 0.0f; |
| mMat[5] = 1.0f; |
| mMat[6] = 0.0f; |
| mMat[7] = 0.0f; |
| |
| mMat[8] = 0.0f; |
| mMat[9] = 0.0f; |
| mMat[10] = 1.0f; |
| mMat[11] = 0.0f; |
| |
| mMat[12] = 0.0f; |
| mMat[13] = 0.0f; |
| mMat[14] = 0.0f; |
| mMat[15] = 1.0f; |
| } |
| |
| void Matrix4::load(const float* v) { |
| memcpy(mMat, v, sizeof(mMat)); |
| } |
| |
| void Matrix4::load(const Matrix4& v) { |
| memcpy(mMat, v.mMat, sizeof(mMat)); |
| } |
| |
| void Matrix4::load(const SkMatrix& v) { |
| memset(mMat, 0, sizeof(mMat)); |
| |
| mMat[0] = v[SkMatrix::kMScaleX]; |
| mMat[4] = v[SkMatrix::kMSkewX]; |
| mMat[12] = v[SkMatrix::kMTransX]; |
| |
| mMat[1] = v[SkMatrix::kMSkewY]; |
| mMat[5] = v[SkMatrix::kMScaleY]; |
| mMat[13] = v[SkMatrix::kMTransY]; |
| |
| mMat[3] = v[SkMatrix::kMPersp0]; |
| mMat[7] = v[SkMatrix::kMPersp1]; |
| mMat[15] = v[SkMatrix::kMPersp2]; |
| |
| mMat[10] = 1.0f; |
| } |
| |
| void Matrix4::copyTo(SkMatrix& v) const { |
| v.reset(); |
| |
| v.set(SkMatrix::kMScaleX, mMat[0]); |
| v.set(SkMatrix::kMSkewX, mMat[4]); |
| v.set(SkMatrix::kMTransX, mMat[12]); |
| |
| v.set(SkMatrix::kMSkewY, mMat[1]); |
| v.set(SkMatrix::kMScaleY, mMat[5]); |
| v.set(SkMatrix::kMTransY, mMat[13]); |
| |
| v.set(SkMatrix::kMPersp0, mMat[3]); |
| v.set(SkMatrix::kMPersp1, mMat[7]); |
| v.set(SkMatrix::kMPersp2, mMat[15]); |
| } |
| |
| void Matrix4::copyTo(float* v) const { |
| memcpy(v, mMat, sizeof(mMat)); |
| } |
| |
| void Matrix4::loadTranslate(float x, float y, float z) { |
| loadIdentity(); |
| mMat[12] = x; |
| mMat[13] = y; |
| mMat[14] = z; |
| } |
| |
| void Matrix4::loadScale(float sx, float sy, float sz) { |
| loadIdentity(); |
| mMat[0] = sx; |
| mMat[5] = sy; |
| mMat[10] = sz; |
| } |
| |
| void Matrix4::loadRotate(float angle, float x, float y, float z) { |
| mMat[3] = 0.0f; |
| mMat[7] = 0.0f; |
| mMat[11] = 0.0f; |
| mMat[12] = 0.0f; |
| mMat[13] = 0.0f; |
| mMat[14] = 0.0f; |
| mMat[15] = 1.0f; |
| |
| angle *= float(M_PI / 180.0f); |
| float c = cosf(angle); |
| float s = sinf(angle); |
| |
| const float length = sqrtf(x * x + y * y + z * z); |
| const float nc = 1.0f - c; |
| const float xy = x * y; |
| const float yz = y * z; |
| const float zx = z * x; |
| const float xs = x * s; |
| const float ys = y * s; |
| const float zs = z * s; |
| |
| mMat[0] = x * x * nc + c; |
| mMat[4] = xy * nc - zs; |
| mMat[8] = zx * nc + ys; |
| mMat[1] = xy * nc + zs; |
| mMat[5] = y * y * nc + c; |
| mMat[9] = yz * nc - xs; |
| mMat[2] = zx * nc - ys; |
| mMat[6] = yz * nc + xs; |
| mMat[10] = z * z * nc + c; |
| } |
| |
| void Matrix4::loadMultiply(const Matrix4& u, const Matrix4& v) { |
| for (int i = 0 ; i < 4 ; i++) { |
| float x = 0; |
| float y = 0; |
| float z = 0; |
| float w = 0; |
| |
| for (int j = 0 ; j < 4 ; j++) { |
| const float e = v.get(i,j); |
| x += u.get(j, 0) * e; |
| y += u.get(j, 1) * e; |
| z += u.get(j, 2) * e; |
| w += u.get(j, 3) * e; |
| } |
| |
| set(i, 0, x); |
| set(i, 1, y); |
| set(i, 2, z); |
| set(i, 3, w); |
| } |
| } |
| |
| void Matrix4::loadOrtho(float left, float right, float bottom, float top, float near, float far) { |
| loadIdentity(); |
| mMat[0] = 2.0f / (right - left); |
| mMat[5] = 2.0f / (top - bottom); |
| mMat[10] = -2.0f / (far - near); |
| mMat[12] = -(right + left) / (right - left); |
| mMat[13] = -(top + bottom) / (top - bottom); |
| mMat[14] = -(far + near) / (far - near); |
| } |
| |
| #define MUL_ADD_STORE(a, b, c) a = (a) * (b) + (c) |
| |
| void Matrix4::mapRect(Rect& r) const { |
| const float sx = mMat[0]; |
| const float sy = mMat[5]; |
| |
| const float tx = mMat[12]; |
| const float ty = mMat[13]; |
| |
| MUL_ADD_STORE(r.left, sx, tx); |
| MUL_ADD_STORE(r.right, sx, tx); |
| MUL_ADD_STORE(r.top, sy, ty); |
| MUL_ADD_STORE(r.bottom, sy, ty); |
| } |
| |
| void Matrix4::dump() const { |
| LOGD("Matrix4["); |
| LOGD(" %f %f %f %f", mMat[0], mMat[4], mMat[ 8], mMat[12]); |
| LOGD(" %f %f %f %f", mMat[1], mMat[5], mMat[ 9], mMat[13]); |
| LOGD(" %f %f %f %f", mMat[2], mMat[6], mMat[10], mMat[14]); |
| LOGD(" %f %f %f %f", mMat[3], mMat[7], mMat[11], mMat[15]); |
| LOGD("]"); |
| } |
| |
| }; // namespace uirenderer |
| }; // namespace android |