1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "GLESv2Context.h"
18
19
20
init()21 void GLESv2Context::init() {
22 android::Mutex::Autolock mutex(s_lock);
23 if(!m_initialized) {
24 s_glDispatch.dispatchFuncs(GLES_2_0);
25 GLEScontext::init();
26 for(int i=0; i < s_glSupport.maxVertexAttribs;i++){
27 m_map[i] = new GLESpointer();
28 }
29 setAttribute0value(0.0, 0.0, 0.0, 1.0);
30
31 buildStrings((const char*)dispatcher().glGetString(GL_VENDOR),
32 (const char*)dispatcher().glGetString(GL_RENDERER),
33 (const char*)dispatcher().glGetString(GL_VERSION),
34 "OpenGL ES 2.0");
35 }
36 m_initialized = true;
37 }
38
GLESv2Context()39 GLESv2Context::GLESv2Context():GLEScontext(), m_att0Array(NULL), m_att0ArrayLength(0), m_att0NeedsDisable(false){};
40
~GLESv2Context()41 GLESv2Context::~GLESv2Context()
42 {
43 delete[] m_att0Array;
44 }
45
setAttribute0value(float x,float y,float z,float w)46 void GLESv2Context::setAttribute0value(float x, float y, float z, float w)
47 {
48 m_attribute0value[0] = x;
49 m_attribute0value[1] = y;
50 m_attribute0value[2] = z;
51 m_attribute0value[3] = w;
52 }
53
validateAtt0PreDraw(unsigned int count)54 void GLESv2Context::validateAtt0PreDraw(unsigned int count)
55 {
56 m_att0NeedsDisable = false;
57
58 if(count == 0)
59 return;
60
61 int enabled = 0;
62 s_glDispatch.glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &enabled);
63 if(enabled)
64 return;
65
66 if(count > m_att0ArrayLength)
67 {
68 delete [] m_att0Array;
69 m_att0Array = new GLfloat[4*count];
70 m_att0ArrayLength = count;
71 }
72
73 for(unsigned int i=0; i<count; i++)
74 memcpy(m_att0Array+i*4, m_attribute0value, 4*sizeof(GLfloat));
75
76 s_glDispatch.glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, m_att0Array);
77 s_glDispatch.glEnableVertexAttribArray(0);
78
79 m_att0NeedsDisable = true;
80 }
81
validateAtt0PostDraw(void)82 void GLESv2Context::validateAtt0PostDraw(void)
83 {
84 if(m_att0NeedsDisable)
85 s_glDispatch.glDisableVertexAttribArray(0);
86
87 m_att0NeedsDisable = false;
88 }
89
setupArraysPointers(GLESConversionArrays & cArrs,GLint first,GLsizei count,GLenum type,const GLvoid * indices,bool direct)90 void GLESv2Context::setupArraysPointers(GLESConversionArrays& cArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct) {
91 ArraysMap::iterator it;
92
93 //going over all clients arrays Pointers
94 for ( it=m_map.begin() ; it != m_map.end(); it++ ) {
95 GLenum array_id = (*it).first;
96 GLESpointer* p = (*it).second;
97 if(!isArrEnabled(array_id)) continue;
98
99 unsigned int size = p->getSize();
100
101 if(needConvert(cArrs,first,count,type,indices,direct,p,array_id)){
102 //conversion has occured
103 ArrayData currentArr = cArrs.getCurrentArray();
104 setupArr(currentArr.data,array_id,currentArr.type,size,currentArr.stride, p->getNormalized());
105 ++cArrs;
106 } else {
107 setupArr(p->getData(),array_id,p->getType(),
108 size,p->getStride(), p->getNormalized());
109 }
110 }
111 }
112
113 //setting client side arr
setupArr(const GLvoid * arr,GLenum arrayType,GLenum dataType,GLint size,GLsizei stride,GLboolean normalized,int index)114 void GLESv2Context::setupArr(const GLvoid* arr,GLenum arrayType,GLenum dataType,GLint size,GLsizei stride,GLboolean normalized, int index){
115 if(arr == NULL) return;
116 s_glDispatch.glVertexAttribPointer(arrayType,size,dataType,normalized,stride,arr);
117 }
118
needConvert(GLESConversionArrays & cArrs,GLint first,GLsizei count,GLenum type,const GLvoid * indices,bool direct,GLESpointer * p,GLenum array_id)119 bool GLESv2Context::needConvert(GLESConversionArrays& cArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct,GLESpointer* p,GLenum array_id) {
120
121 bool usingVBO = p->isVBO();
122 GLenum arrType = p->getType();
123 /*
124 conversion is not necessary in the following cases:
125 (*) array type is not fixed
126 */
127 if(arrType != GL_FIXED) return false;
128
129 if(!usingVBO) {
130 if (direct) {
131 convertDirect(cArrs,first,count,array_id,p);
132 } else {
133 convertIndirect(cArrs,count,type,indices,array_id,p);
134 }
135 } else {
136 if (direct) {
137 convertDirectVBO(cArrs,first,count,array_id,p) ;
138 } else {
139 convertIndirectVBO(cArrs,count,type,indices,array_id,p);
140 }
141 }
142 return true;
143 }
144
initExtensionString()145 void GLESv2Context::initExtensionString() {
146 *s_glExtensions = "GL_OES_EGL_image GL_OES_depth24 GL_OES_depth32 GL_OES_element_index_uint "
147 "GL_OES_texture_float GL_OES_texture_float_linear "
148 "GL_OES_compressed_paletted_texture GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth_texture ";
149 if (s_glSupport.GL_ARB_HALF_FLOAT_PIXEL || s_glSupport.GL_NV_HALF_FLOAT)
150 *s_glExtensions+="GL_OES_texture_half_float GL_OES_texture_half_float_linear ";
151 if (s_glSupport.GL_EXT_PACKED_DEPTH_STENCIL)
152 *s_glExtensions+="GL_OES_packed_depth_stencil ";
153 if (s_glSupport.GL_ARB_HALF_FLOAT_VERTEX)
154 *s_glExtensions+="GL_OES_vertex_half_float ";
155 if (s_glSupport.GL_OES_STANDARD_DERIVATIVES)
156 *s_glExtensions+="GL_OES_standard_derivatives ";
157 }
158
getMaxTexUnits()159 int GLESv2Context::getMaxTexUnits() {
160 return getCaps()->maxTexImageUnits;
161 }
162