| /* |
| * 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 "OpenGLRenderer" |
| |
| #include <math.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <utils/Log.h> |
| |
| #include <SkMatrix.h> |
| |
| #include "utils/Compare.h" |
| #include "Matrix.h" |
| |
| namespace android { |
| namespace uirenderer { |
| |
| void Matrix4::loadIdentity() { |
| data[kScaleX] = 1.0f; |
| data[kSkewY] = 0.0f; |
| data[2] = 0.0f; |
| data[kPerspective0] = 0.0f; |
| |
| data[kSkewX] = 0.0f; |
| data[kScaleY] = 1.0f; |
| data[6] = 0.0f; |
| data[kPerspective1] = 0.0f; |
| |
| data[8] = 0.0f; |
| data[9] = 0.0f; |
| data[kScaleZ] = 1.0f; |
| data[11] = 0.0f; |
| |
| data[kTranslateX] = 0.0f; |
| data[kTranslateY] = 0.0f; |
| data[kTranslateZ] = 0.0f; |
| data[kPerspective2] = 1.0f; |
| |
| mSimpleMatrix = true; |
| } |
| |
| bool Matrix4::changesBounds() { |
| return !(ALMOST_EQUAL(data[0], 1.0f) && ALMOST_EQUAL(data[1], 0.0f) && |
| ALMOST_EQUAL(data[2], 0.0f) && ALMOST_EQUAL(data[4], 0.0f) && |
| ALMOST_EQUAL(data[5], 1.0f) && ALMOST_EQUAL(data[6], 0.0f) && |
| ALMOST_EQUAL(data[8], 0.0f) && ALMOST_EQUAL(data[9], 0.0f) && |
| ALMOST_EQUAL(data[10], 1.0f)); |
| } |
| |
| bool Matrix4::isPureTranslate() { |
| return mSimpleMatrix && |
| ALMOST_EQUAL(data[kScaleX], 1.0f) && ALMOST_EQUAL(data[kScaleY], 1.0f); |
| } |
| |
| bool Matrix4::isSimple() { |
| return mSimpleMatrix; |
| } |
| |
| void Matrix4::load(const float* v) { |
| memcpy(data, v, sizeof(data)); |
| mSimpleMatrix = false; |
| } |
| |
| void Matrix4::load(const Matrix4& v) { |
| memcpy(data, v.data, sizeof(data)); |
| mSimpleMatrix = v.mSimpleMatrix; |
| } |
| |
| void Matrix4::load(const SkMatrix& v) { |
| memset(data, 0, sizeof(data)); |
| |
| data[kScaleX] = v[SkMatrix::kMScaleX]; |
| data[kSkewX] = v[SkMatrix::kMSkewX]; |
| data[kTranslateX] = v[SkMatrix::kMTransX]; |
| |
| data[kSkewY] = v[SkMatrix::kMSkewY]; |
| data[kScaleY] = v[SkMatrix::kMScaleY]; |
| data[kTranslateY] = v[SkMatrix::kMTransY]; |
| |
| data[kPerspective0] = v[SkMatrix::kMPersp0]; |
| data[kPerspective1] = v[SkMatrix::kMPersp1]; |
| data[kPerspective2] = v[SkMatrix::kMPersp2]; |
| |
| data[kScaleZ] = 1.0f; |
| |
| mSimpleMatrix = (v.getType() <= (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)); |
| } |
| |
| void Matrix4::copyTo(SkMatrix& v) const { |
| v.reset(); |
| |
| v.set(SkMatrix::kMScaleX, data[kScaleX]); |
| v.set(SkMatrix::kMSkewX, data[kSkewX]); |
| v.set(SkMatrix::kMTransX, data[kTranslateX]); |
| |
| v.set(SkMatrix::kMSkewY, data[kSkewY]); |
| v.set(SkMatrix::kMScaleY, data[kScaleY]); |
| v.set(SkMatrix::kMTransY, data[kTranslateY]); |
| |
| v.set(SkMatrix::kMPersp0, data[kPerspective0]); |
| v.set(SkMatrix::kMPersp1, data[kPerspective1]); |
| v.set(SkMatrix::kMPersp2, data[kPerspective2]); |
| } |
| |
| void Matrix4::loadInverse(const Matrix4& v) { |
| double scale = 1.0 / |
| (v.data[kScaleX] * ((double) v.data[kScaleY] * v.data[kPerspective2] - |
| (double) v.data[kTranslateY] * v.data[kPerspective1]) + |
| v.data[kSkewX] * ((double) v.data[kTranslateY] * v.data[kPerspective0] - |
| (double) v.data[kSkewY] * v.data[kPerspective2]) + |
| v.data[kTranslateX] * ((double) v.data[kSkewY] * v.data[kPerspective1] - |
| (double) v.data[kScaleY] * v.data[kPerspective0])); |
| |
| data[kScaleX] = (v.data[kScaleY] * v.data[kPerspective2] - |
| v.data[kTranslateY] * v.data[kPerspective1]) * scale; |
| data[kSkewX] = (v.data[kTranslateX] * v.data[kPerspective1] - |
| v.data[kSkewX] * v.data[kPerspective2]) * scale; |
| data[kTranslateX] = (v.data[kSkewX] * v.data[kTranslateY] - |
| v.data[kTranslateX] * v.data[kScaleY]) * scale; |
| |
| data[kSkewY] = (v.data[kTranslateY] * v.data[kPerspective0] - |
| v.data[kSkewY] * v.data[kPerspective2]) * scale; |
| data[kScaleY] = (v.data[kScaleX] * v.data[kPerspective2] - |
| v.data[kTranslateX] * v.data[kPerspective0]) * scale; |
| data[kTranslateY] = (v.data[kTranslateX] * v.data[kSkewY] - |
| v.data[kScaleX] * v.data[kTranslateY]) * scale; |
| |
| data[kPerspective0] = (v.data[kSkewY] * v.data[kPerspective1] - |
| v.data[kScaleY] * v.data[kPerspective0]) * scale; |
| data[kPerspective1] = (v.data[kSkewX] * v.data[kPerspective0] - |
| v.data[kScaleX] * v.data[kPerspective1]) * scale; |
| data[kPerspective2] = (v.data[kScaleX] * v.data[kScaleY] - |
| v.data[kSkewX] * v.data[kSkewY]) * scale; |
| |
| mSimpleMatrix = v.mSimpleMatrix; |
| } |
| |
| void Matrix4::copyTo(float* v) const { |
| memcpy(v, data, sizeof(data)); |
| } |
| |
| float Matrix4::getTranslateX() { |
| return data[kTranslateX]; |
| } |
| |
| float Matrix4::getTranslateY() { |
| return data[kTranslateY]; |
| } |
| |
| void Matrix4::multiply(float v) { |
| for (int i = 0; i < 16; i++) { |
| data[i] *= v; |
| } |
| } |
| |
| void Matrix4::loadTranslate(float x, float y, float z) { |
| loadIdentity(); |
| data[kTranslateX] = x; |
| data[kTranslateY] = y; |
| data[kTranslateZ] = z; |
| } |
| |
| void Matrix4::loadScale(float sx, float sy, float sz) { |
| loadIdentity(); |
| data[kScaleX] = sx; |
| data[kScaleY] = sy; |
| data[kScaleZ] = sz; |
| } |
| |
| void Matrix4::loadSkew(float sx, float sy) { |
| loadIdentity(); |
| |
| data[kScaleX] = 1.0f; |
| data[kSkewX] = sx; |
| data[kTranslateX] = 0.0f; |
| |
| data[kSkewY] = sy; |
| data[kScaleY] = 1.0f; |
| data[kTranslateY] = 0.0f; |
| |
| data[kPerspective0] = 0.0f; |
| data[kPerspective1] = 0.0f; |
| data[kPerspective2] = 1.0f; |
| |
| mSimpleMatrix = false; |
| } |
| |
| void Matrix4::loadRotate(float angle, float x, float y, float z) { |
| data[kPerspective0] = 0.0f; |
| data[kPerspective1] = 0.0f; |
| data[11] = 0.0f; |
| data[kTranslateX] = 0.0f; |
| data[kTranslateY] = 0.0f; |
| data[kTranslateZ] = 0.0f; |
| data[kPerspective2] = 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); |
| float recipLen = 1.0f / length; |
| x *= recipLen; |
| y *= recipLen; |
| z *= recipLen; |
| |
| 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; |
| |
| data[kScaleX] = x * x * nc + c; |
| data[kSkewX] = xy * nc - zs; |
| data[8] = zx * nc + ys; |
| data[kSkewY] = xy * nc + zs; |
| data[kScaleY] = y * y * nc + c; |
| data[9] = yz * nc - xs; |
| data[2] = zx * nc - ys; |
| data[6] = yz * nc + xs; |
| data[kScaleZ] = z * z * nc + c; |
| |
| mSimpleMatrix = false; |
| } |
| |
| 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); |
| } |
| |
| mSimpleMatrix = u.mSimpleMatrix && v.mSimpleMatrix; |
| } |
| |
| void Matrix4::loadOrtho(float left, float right, float bottom, float top, float near, float far) { |
| loadIdentity(); |
| data[kScaleX] = 2.0f / (right - left); |
| data[kScaleY] = 2.0f / (top - bottom); |
| data[kScaleZ] = -2.0f / (far - near); |
| data[kTranslateX] = -(right + left) / (right - left); |
| data[kTranslateY] = -(top + bottom) / (top - bottom); |
| data[kTranslateZ] = -(far + near) / (far - near); |
| } |
| |
| #define MUL_ADD_STORE(a, b, c) a = (a) * (b) + (c) |
| |
| void Matrix4::mapPoint(float& x, float& y) const { |
| if (mSimpleMatrix) { |
| MUL_ADD_STORE(x, data[kScaleX], data[kTranslateX]); |
| MUL_ADD_STORE(y, data[kScaleY], data[kTranslateY]); |
| return; |
| } |
| |
| float dx = x * data[kScaleX] + y * data[kSkewX] + data[kTranslateX]; |
| float dy = x * data[kSkewY] + y * data[kScaleY] + data[kTranslateY]; |
| float dz = x * data[kPerspective0] + y * data[kPerspective1] + data[kPerspective2]; |
| if (dz) dz = 1.0f / dz; |
| |
| x = dx * dz; |
| y = dy * dz; |
| } |
| |
| void Matrix4::mapRect(Rect& r) const { |
| if (mSimpleMatrix) { |
| MUL_ADD_STORE(r.left, data[kScaleX], data[kTranslateX]); |
| MUL_ADD_STORE(r.right, data[kScaleX], data[kTranslateX]); |
| MUL_ADD_STORE(r.top, data[kScaleY], data[kTranslateY]); |
| MUL_ADD_STORE(r.bottom, data[kScaleY], data[kTranslateY]); |
| |
| if (r.left > r.right) { |
| float x = r.left; |
| r.left = r.right; |
| r.right = x; |
| } |
| |
| if (r.top > r.bottom) { |
| float y = r.top; |
| r.top = r.bottom; |
| r.bottom = y; |
| } |
| |
| return; |
| } |
| |
| float vertices[] = { |
| r.left, r.top, |
| r.right, r.top, |
| r.right, r.bottom, |
| r.left, r.bottom |
| }; |
| |
| float x, y, z; |
| |
| for (int i = 0; i < 8; i+= 2) { |
| float px = vertices[i]; |
| float py = vertices[i + 1]; |
| |
| x = px * data[kScaleX] + py * data[kSkewX] + data[kTranslateX]; |
| y = px * data[kSkewY] + py * data[kScaleY] + data[kTranslateY]; |
| z = px * data[kPerspective0] + py * data[kPerspective1] + data[kPerspective2]; |
| if (z) z = 1.0f / z; |
| |
| vertices[i] = x * z; |
| vertices[i + 1] = y * z; |
| } |
| |
| r.left = r.right = vertices[0]; |
| r.top = r.bottom = vertices[1]; |
| |
| for (int i = 2; i < 8; i += 2) { |
| x = vertices[i]; |
| y = vertices[i + 1]; |
| |
| if (x < r.left) r.left = x; |
| else if (x > r.right) r.right = x; |
| if (y < r.top) r.top = y; |
| else if (y > r.bottom) r.bottom = y; |
| } |
| } |
| |
| void Matrix4::dump() const { |
| LOGD("Matrix4[simple=%d", mSimpleMatrix); |
| LOGD(" %f %f %f %f", data[kScaleX], data[kSkewX], data[8], data[kTranslateX]); |
| LOGD(" %f %f %f %f", data[kSkewY], data[kScaleY], data[9], data[kTranslateY]); |
| LOGD(" %f %f %f %f", data[2], data[6], data[kScaleZ], data[kTranslateZ]); |
| LOGD(" %f %f %f %f", data[kPerspective0], data[kPerspective1], data[11], data[kPerspective2]); |
| LOGD("]"); |
| } |
| |
| }; // namespace uirenderer |
| }; // namespace android |
