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 #include <string.h>
19
init()20 void GLESv2Context::init() {
21 emugl::Mutex::AutoLock mutex(s_lock);
22 if(!m_initialized) {
23 s_glDispatch.dispatchFuncs(GLES_2_0);
24 GLEScontext::init();
25 for(int i=0; i < s_glSupport.maxVertexAttribs;i++){
26 m_map[i] = new GLESpointer();
27 }
28 setAttribute0value(0.0, 0.0, 0.0, 1.0);
29
30 buildStrings((const char*)dispatcher().glGetString(GL_VENDOR),
31 (const char*)dispatcher().glGetString(GL_RENDERER),
32 (const char*)dispatcher().glGetString(GL_VERSION),
33 "OpenGL ES 2.0");
34 }
35 m_initialized = true;
36 }
37
GLESv2Context()38 GLESv2Context::GLESv2Context():GLEScontext(), m_att0Array(NULL), m_att0ArrayLength(0), m_att0NeedsDisable(false){};
39
~GLESv2Context()40 GLESv2Context::~GLESv2Context()
41 {
42 delete[] m_att0Array;
43 }
44
setAttribute0value(float x,float y,float z,float w)45 void GLESv2Context::setAttribute0value(float x, float y, float z, float w)
46 {
47 m_attribute0value[0] = x;
48 m_attribute0value[1] = y;
49 m_attribute0value[2] = z;
50 m_attribute0value[3] = w;
51 }
52
validateAtt0PreDraw(unsigned int count)53 void GLESv2Context::validateAtt0PreDraw(unsigned int count)
54 {
55 m_att0NeedsDisable = false;
56
57 if(count == 0)
58 return;
59
60 int enabled = 0;
61 s_glDispatch.glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &enabled);
62 if(enabled)
63 return;
64
65 if(count > m_att0ArrayLength)
66 {
67 delete [] m_att0Array;
68 m_att0Array = new GLfloat[4*count];
69 m_att0ArrayLength = count;
70 }
71
72 for(unsigned int i=0; i<count; i++)
73 memcpy(m_att0Array+i*4, m_attribute0value, 4*sizeof(GLfloat));
74
75 s_glDispatch.glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, m_att0Array);
76 s_glDispatch.glEnableVertexAttribArray(0);
77
78 m_att0NeedsDisable = true;
79 }
80
validateAtt0PostDraw(void)81 void GLESv2Context::validateAtt0PostDraw(void)
82 {
83 if(m_att0NeedsDisable)
84 s_glDispatch.glDisableVertexAttribArray(0);
85
86 m_att0NeedsDisable = false;
87 }
88
setupArraysPointers(GLESConversionArrays & cArrs,GLint first,GLsizei count,GLenum type,const GLvoid * indices,bool direct)89 void GLESv2Context::setupArraysPointers(GLESConversionArrays& cArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct) {
90 ArraysMap::iterator it;
91
92 //going over all clients arrays Pointers
93 for ( it=m_map.begin() ; it != m_map.end(); it++ ) {
94 GLenum array_id = (*it).first;
95 GLESpointer* p = (*it).second;
96 if(!isArrEnabled(array_id)) continue;
97
98 unsigned int size = p->getSize();
99
100 if(needConvert(cArrs,first,count,type,indices,direct,p,array_id)){
101 //conversion has occured
102 ArrayData currentArr = cArrs.getCurrentArray();
103 setupArr(currentArr.data,array_id,currentArr.type,size,currentArr.stride, p->getNormalized());
104 ++cArrs;
105 } else {
106 setupArr(p->getData(),array_id,p->getType(),
107 size,p->getStride(), p->getNormalized());
108 }
109 }
110 }
111
112 //setting client side arr
setupArr(const GLvoid * arr,GLenum arrayType,GLenum dataType,GLint size,GLsizei stride,GLboolean normalized,int index)113 void GLESv2Context::setupArr(const GLvoid* arr,GLenum arrayType,GLenum dataType,GLint size,GLsizei stride,GLboolean normalized, int index){
114 if(arr == NULL) return;
115 s_glDispatch.glVertexAttribPointer(arrayType,size,dataType,normalized,stride,arr);
116 }
117
needConvert(GLESConversionArrays & cArrs,GLint first,GLsizei count,GLenum type,const GLvoid * indices,bool direct,GLESpointer * p,GLenum array_id)118 bool GLESv2Context::needConvert(GLESConversionArrays& cArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct,GLESpointer* p,GLenum array_id) {
119
120 bool usingVBO = p->isVBO();
121 GLenum arrType = p->getType();
122 /*
123 conversion is not necessary in the following cases:
124 (*) array type is not fixed
125 */
126 if(arrType != GL_FIXED) return false;
127
128 if(!usingVBO) {
129 if (direct) {
130 convertDirect(cArrs,first,count,array_id,p);
131 } else {
132 convertIndirect(cArrs,count,type,indices,array_id,p);
133 }
134 } else {
135 if (direct) {
136 convertDirectVBO(cArrs,first,count,array_id,p) ;
137 } else {
138 convertIndirectVBO(cArrs,count,type,indices,array_id,p);
139 }
140 }
141 return true;
142 }
143
initExtensionString()144 void GLESv2Context::initExtensionString() {
145 *s_glExtensions = "GL_OES_EGL_image GL_OES_depth24 GL_OES_depth32 GL_OES_element_index_uint "
146 "GL_OES_texture_float GL_OES_texture_float_linear "
147 "GL_OES_compressed_paletted_texture GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth_texture ";
148 if (s_glSupport.GL_ARB_HALF_FLOAT_PIXEL || s_glSupport.GL_NV_HALF_FLOAT)
149 *s_glExtensions+="GL_OES_texture_half_float GL_OES_texture_half_float_linear ";
150 if (s_glSupport.GL_EXT_PACKED_DEPTH_STENCIL)
151 *s_glExtensions+="GL_OES_packed_depth_stencil ";
152 if (s_glSupport.GL_ARB_HALF_FLOAT_VERTEX)
153 *s_glExtensions+="GL_OES_vertex_half_float ";
154 if (s_glSupport.GL_OES_STANDARD_DERIVATIVES)
155 *s_glExtensions+="GL_OES_standard_derivatives ";
156 }
157
getMaxTexUnits()158 int GLESv2Context::getMaxTexUnits() {
159 return getCaps()->maxTexImageUnits;
160 }
161