476 lines
14 KiB
C++
476 lines
14 KiB
C++
/*
|
|
* 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 "Matrix.h"
|
|
|
|
namespace android {
|
|
namespace uirenderer {
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Defines
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
static const float EPSILON = 0.0000001f;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Matrix
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
const Matrix4& Matrix4::identity() {
|
|
static Matrix4 sIdentity;
|
|
return sIdentity;
|
|
}
|
|
|
|
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;
|
|
|
|
mType = kTypeIdentity | kTypeRectToRect;
|
|
}
|
|
|
|
static bool isZero(float f) {
|
|
return fabs(f) <= EPSILON;
|
|
}
|
|
|
|
uint8_t Matrix4::getType() const {
|
|
if (mType & kTypeUnknown) {
|
|
mType = kTypeIdentity;
|
|
|
|
if (data[kPerspective0] != 0.0f || data[kPerspective1] != 0.0f ||
|
|
data[kPerspective2] != 1.0f) {
|
|
mType |= kTypePerspective;
|
|
}
|
|
|
|
if (data[kTranslateX] != 0.0f || data[kTranslateY] != 0.0f) {
|
|
mType |= kTypeTranslate;
|
|
}
|
|
|
|
float m00 = data[kScaleX];
|
|
float m01 = data[kSkewX];
|
|
float m10 = data[kSkewY];
|
|
float m11 = data[kScaleY];
|
|
|
|
if (m01 != 0.0f || m10 != 0.0f) {
|
|
mType |= kTypeAffine;
|
|
}
|
|
|
|
if (m00 != 1.0f || m11 != 1.0f) {
|
|
mType |= kTypeScale;
|
|
}
|
|
|
|
// The following section determines whether the matrix will preserve
|
|
// rectangles. For instance, a rectangle transformed by a pure
|
|
// translation matrix will result in a rectangle. A rectangle
|
|
// transformed by a 45 degrees rotation matrix is not a rectangle.
|
|
// If the matrix has a perspective component then we already know
|
|
// it doesn't preserve rectangles.
|
|
if (!(mType & kTypePerspective)) {
|
|
if ((isZero(m00) && isZero(m11) && !isZero(m01) && !isZero(m10)) ||
|
|
(isZero(m01) && isZero(m10) && !isZero(m00) && !isZero(m11))) {
|
|
mType |= kTypeRectToRect;
|
|
}
|
|
}
|
|
}
|
|
return mType;
|
|
}
|
|
|
|
uint8_t Matrix4::getGeometryType() const {
|
|
return getType() & sGeometryMask;
|
|
}
|
|
|
|
bool Matrix4::rectToRect() const {
|
|
return getType() & kTypeRectToRect;
|
|
}
|
|
|
|
bool Matrix4::changesBounds() const {
|
|
return getType() & (kTypeScale | kTypeAffine | kTypePerspective);
|
|
}
|
|
|
|
bool Matrix4::isPureTranslate() const {
|
|
return getGeometryType() <= kTypeTranslate;
|
|
}
|
|
|
|
bool Matrix4::isSimple() const {
|
|
return getGeometryType() <= (kTypeScale | kTypeTranslate);
|
|
}
|
|
|
|
bool Matrix4::isIdentity() const {
|
|
return getGeometryType() == kTypeIdentity;
|
|
}
|
|
|
|
bool Matrix4::isPerspective() const {
|
|
return getType() & kTypePerspective;
|
|
}
|
|
|
|
void Matrix4::load(const float* v) {
|
|
memcpy(data, v, sizeof(data));
|
|
mType = kTypeUnknown;
|
|
}
|
|
|
|
void Matrix4::load(const Matrix4& v) {
|
|
memcpy(data, v.data, sizeof(data));
|
|
mType = v.getType();
|
|
}
|
|
|
|
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;
|
|
|
|
// NOTE: The flags are compatible between SkMatrix and this class.
|
|
// However, SkMatrix::getType() does not return the flag
|
|
// kRectStaysRect. The return value is masked with 0xF
|
|
// so we need the extra rectStaysRect() check
|
|
mType = v.getType();
|
|
if (v.rectStaysRect()) {
|
|
mType |= kTypeRectToRect;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
mType = kTypeUnknown;
|
|
}
|
|
|
|
void Matrix4::copyTo(float* v) const {
|
|
memcpy(v, data, sizeof(data));
|
|
}
|
|
|
|
float Matrix4::getTranslateX() const {
|
|
return data[kTranslateX];
|
|
}
|
|
|
|
float Matrix4::getTranslateY() const {
|
|
return data[kTranslateY];
|
|
}
|
|
|
|
void Matrix4::multiply(float v) {
|
|
for (int i = 0; i < 16; i++) {
|
|
data[i] *= v;
|
|
}
|
|
mType = kTypeUnknown;
|
|
}
|
|
|
|
void Matrix4::loadTranslate(float x, float y, float z) {
|
|
loadIdentity();
|
|
|
|
data[kTranslateX] = x;
|
|
data[kTranslateY] = y;
|
|
data[kTranslateZ] = z;
|
|
|
|
mType = kTypeTranslate | kTypeRectToRect;
|
|
}
|
|
|
|
void Matrix4::loadScale(float sx, float sy, float sz) {
|
|
loadIdentity();
|
|
|
|
data[kScaleX] = sx;
|
|
data[kScaleY] = sy;
|
|
data[kScaleZ] = sz;
|
|
|
|
mType = kTypeScale | kTypeRectToRect;
|
|
}
|
|
|
|
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;
|
|
|
|
mType = kTypeUnknown;
|
|
}
|
|
|
|
void Matrix4::loadRotate(float angle) {
|
|
angle *= float(M_PI / 180.0f);
|
|
float c = cosf(angle);
|
|
float s = sinf(angle);
|
|
|
|
loadIdentity();
|
|
|
|
data[kScaleX] = c;
|
|
data[kSkewX] = -s;
|
|
|
|
data[kSkewY] = s;
|
|
data[kScaleY] = c;
|
|
|
|
mType = kTypeUnknown;
|
|
}
|
|
|
|
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;
|
|
|
|
mType = kTypeUnknown;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
mType = kTypeUnknown;
|
|
}
|
|
|
|
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);
|
|
|
|
mType = kTypeTranslate | kTypeScale | kTypeRectToRect;
|
|
}
|
|
|
|
#define MUL_ADD_STORE(a, b, c) a = (a) * (b) + (c)
|
|
|
|
void Matrix4::mapPoint(float& x, float& y) const {
|
|
if (isSimple()) {
|
|
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 (isSimple()) {
|
|
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::decomposeScale(float& sx, float& sy) const {
|
|
float len;
|
|
len = data[mat4::kScaleX] * data[mat4::kScaleX] + data[mat4::kSkewX] * data[mat4::kSkewX];
|
|
sx = copysignf(sqrtf(len), data[mat4::kScaleX]);
|
|
len = data[mat4::kScaleY] * data[mat4::kScaleY] + data[mat4::kSkewY] * data[mat4::kSkewY];
|
|
sy = copysignf(sqrtf(len), data[mat4::kScaleY]);
|
|
}
|
|
|
|
void Matrix4::dump() const {
|
|
ALOGD("Matrix4[simple=%d, type=0x%x", isSimple(), getType());
|
|
ALOGD(" %f %f %f %f", data[kScaleX], data[kSkewX], data[8], data[kTranslateX]);
|
|
ALOGD(" %f %f %f %f", data[kSkewY], data[kScaleY], data[9], data[kTranslateY]);
|
|
ALOGD(" %f %f %f %f", data[2], data[6], data[kScaleZ], data[kTranslateZ]);
|
|
ALOGD(" %f %f %f %f", data[kPerspective0], data[kPerspective1], data[11], data[kPerspective2]);
|
|
ALOGD("]");
|
|
}
|
|
|
|
}; // namespace uirenderer
|
|
}; // namespace android
|