bb9524b6bd
The current implementation of clipRect() does not apply local transformations before setting the new clip. Change-Id: I5997871bb638dfcd1a8ef96354846af52427e445
152 lines
3.4 KiB
C++
152 lines
3.4 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "UIMatrix"
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include <utils/Log.h>
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#include "Matrix.h"
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namespace android {
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void Matrix4::loadIdentity() {
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mMat[0] = 1;
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mMat[1] = 0;
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mMat[2] = 0;
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mMat[3] = 0;
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mMat[4] = 0;
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mMat[5] = 1;
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mMat[6] = 0;
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mMat[7] = 0;
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mMat[8] = 0;
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mMat[9] = 0;
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mMat[10] = 1;
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mMat[11] = 0;
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mMat[12] = 0;
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mMat[13] = 0;
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mMat[14] = 0;
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mMat[15] = 1;
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}
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void Matrix4::load(const float* v) {
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memcpy(mMat, v, sizeof(mMat));
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}
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void Matrix4::load(const Matrix4& v) {
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memcpy(mMat, v.mMat, sizeof(mMat));
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}
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void Matrix4::copyTo(float* v) const {
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memcpy(v, mMat, sizeof(mMat));
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}
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void Matrix4::loadTranslate(float x, float y, float z) {
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loadIdentity();
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mMat[12] = x;
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mMat[13] = y;
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mMat[14] = z;
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}
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void Matrix4::loadScale(float sx, float sy, float sz) {
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loadIdentity();
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mMat[0] = sx;
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mMat[5] = sy;
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mMat[10] = sz;
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}
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void Matrix4::loadRotate(float angle, float x, float y, float z) {
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mMat[3] = 0;
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mMat[7] = 0;
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mMat[11] = 0;
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mMat[12] = 0;
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mMat[13] = 0;
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mMat[14] = 0;
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mMat[15] = 1;
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angle *= float(M_PI / 180.0f);
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float c = cosf(angle);
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float s = sinf(angle);
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const float length = sqrtf(x * x + y * y + z * z);
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const float nc = 1.0f - c;
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const float xy = x * y;
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const float yz = y * z;
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const float zx = z * x;
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const float xs = x * s;
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const float ys = y * s;
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const float zs = z * s;
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mMat[0] = x * x * nc + c;
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mMat[4] = xy * nc - zs;
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mMat[8] = zx * nc + ys;
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mMat[1] = xy * nc + zs;
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mMat[5] = y * y * nc + c;
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mMat[9] = yz * nc - xs;
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mMat[2] = zx * nc - ys;
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mMat[6] = yz * nc + xs;
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mMat[10] = z * z * nc + c;
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}
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void Matrix4::loadMultiply(const Matrix4& u, const Matrix4& v) {
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for (int i = 0 ; i < 4 ; i++) {
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float x = 0;
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float y = 0;
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float z = 0;
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float w = 0;
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for (int j = 0 ; j < 4 ; j++) {
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const float e = v.get(i,j);
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x += u.get(j, 0) * e;
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y += u.get(j, 1) * e;
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z += u.get(j, 2) * e;
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w += u.get(j, 3) * e;
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}
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set(i, 0, x);
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set(i, 1, y);
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set(i, 2, z);
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set(i, 3, w);
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}
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}
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void Matrix4::loadOrtho(float left, float right, float bottom, float top, float near, float far) {
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loadIdentity();
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mMat[0] = 2 / (right - left);
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mMat[5] = 2 / (top - bottom);
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mMat[10] = -2 / (far - near);
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mMat[12] = -(right + left) / (right - left);
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mMat[13] = -(top + bottom) / (top - bottom);
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mMat[14] = -(far + near) / (far - near);
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}
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void Matrix4::dump() const {
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LOGD("Matrix4[");
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LOGD(" %f %f %f %f", mMat[0], mMat[4], mMat[ 8], mMat[12]);
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LOGD(" %f %f %f %f", mMat[1], mMat[5], mMat[ 9], mMat[13]);
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LOGD(" %f %f %f %f", mMat[2], mMat[6], mMat[10], mMat[14]);
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LOGD(" %f %f %f %f", mMat[3], mMat[7], mMat[11], mMat[15]);
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LOGD("]");
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}
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};
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