1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* 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"
#define ATRACE_TAG ATRACE_TAG_VIEW
#include <utils/Trace.h>
#include "Program.h"
#include "Vertex.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Base program
///////////////////////////////////////////////////////////////////////////////
Program::Program(const ProgramDescription& description, const char* vertex, const char* fragment) {
mInitialized = false;
mHasColorUniform = false;
mHasSampler = false;
mUse = false;
// No need to cache compiled shaders, rely instead on Android's
// persistent shaders cache
mVertexShader = buildShader(vertex, GL_VERTEX_SHADER);
if (mVertexShader) {
mFragmentShader = buildShader(fragment, GL_FRAGMENT_SHADER);
if (mFragmentShader) {
mProgramId = glCreateProgram();
glAttachShader(mProgramId, mVertexShader);
glAttachShader(mProgramId, mFragmentShader);
bindAttrib("position", kBindingPosition);
if (description.hasTexture || description.hasExternalTexture) {
texCoords = bindAttrib("texCoords", kBindingTexCoords);
} else {
texCoords = -1;
}
ATRACE_BEGIN("linkProgram");
glLinkProgram(mProgramId);
ATRACE_END();
GLint status;
glGetProgramiv(mProgramId, GL_LINK_STATUS, &status);
if (status != GL_TRUE) {
GLint infoLen = 0;
glGetProgramiv(mProgramId, GL_INFO_LOG_LENGTH, &infoLen);
if (infoLen > 1) {
GLchar log[infoLen];
glGetProgramInfoLog(mProgramId, infoLen, nullptr, &log[0]);
ALOGE("%s", log);
}
LOG_ALWAYS_FATAL("Error while linking shaders");
} else {
mInitialized = true;
}
} else {
glDeleteShader(mVertexShader);
}
}
if (mInitialized) {
transform = addUniform("transform");
projection = addUniform("projection");
}
}
Program::~Program() {
if (mInitialized) {
// This would ideally happen after linking the program
// but Tegra drivers, especially when perfhud is enabled,
// sometimes crash if we do so
glDetachShader(mProgramId, mVertexShader);
glDetachShader(mProgramId, mFragmentShader);
glDeleteShader(mVertexShader);
glDeleteShader(mFragmentShader);
glDeleteProgram(mProgramId);
}
}
int Program::addAttrib(const char* name) {
int slot = glGetAttribLocation(mProgramId, name);
mAttributes.add(name, slot);
return slot;
}
int Program::bindAttrib(const char* name, ShaderBindings bindingSlot) {
glBindAttribLocation(mProgramId, bindingSlot, name);
mAttributes.add(name, bindingSlot);
return bindingSlot;
}
int Program::getAttrib(const char* name) {
ssize_t index = mAttributes.indexOfKey(name);
if (index >= 0) {
return mAttributes.valueAt(index);
}
return addAttrib(name);
}
int Program::addUniform(const char* name) {
int slot = glGetUniformLocation(mProgramId, name);
mUniforms.add(name, slot);
return slot;
}
int Program::getUniform(const char* name) {
ssize_t index = mUniforms.indexOfKey(name);
if (index >= 0) {
return mUniforms.valueAt(index);
}
return addUniform(name);
}
GLuint Program::buildShader(const char* source, GLenum type) {
ATRACE_NAME("Build GL Shader");
GLuint shader = glCreateShader(type);
glShaderSource(shader, 1, &source, nullptr);
glCompileShader(shader);
GLint status;
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if (status != GL_TRUE) {
ALOGE("Error while compiling this shader:\n===\n%s\n===", source);
// Some drivers return wrong values for GL_INFO_LOG_LENGTH
// use a fixed size instead
GLchar log[512];
glGetShaderInfoLog(shader, sizeof(log), nullptr, &log[0]);
LOG_ALWAYS_FATAL("Shader info log: %s", log);
return 0;
}
return shader;
}
void Program::set(const mat4& projectionMatrix, const mat4& modelViewMatrix,
const mat4& transformMatrix, bool offset) {
if (projectionMatrix != mProjection || offset != mOffset) {
if (CC_LIKELY(!offset)) {
glUniformMatrix4fv(projection, 1, GL_FALSE, &projectionMatrix.data[0]);
} else {
mat4 p(projectionMatrix);
// offset screenspace xy by an amount that compensates for typical precision
// issues in GPU hardware that tends to paint hor/vert lines in pixels shifted
// up and to the left.
// This offset value is based on an assumption that some hardware may use as
// little as 12.4 precision, so we offset by slightly more than 1/16.
p.translate(Vertex::GeometryFudgeFactor(), Vertex::GeometryFudgeFactor());
glUniformMatrix4fv(projection, 1, GL_FALSE, &p.data[0]);
}
mProjection = projectionMatrix;
mOffset = offset;
}
mat4 t(transformMatrix);
t.multiply(modelViewMatrix);
glUniformMatrix4fv(transform, 1, GL_FALSE, &t.data[0]);
}
void Program::setColor(FloatColor color) {
if (!mHasColorUniform) {
mColorUniform = getUniform("color");
mHasColorUniform = true;
}
glUniform4f(mColorUniform, color.r, color.g, color.b, color.a);
}
void Program::use() {
glUseProgram(mProgramId);
if (texCoords >= 0 && !mHasSampler) {
glUniform1i(getUniform("baseSampler"), 0);
mHasSampler = true;
}
mUse = true;
}
void Program::remove() {
mUse = false;
}
}; // namespace uirenderer
}; // namespace android
|
