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 const char* baseRenderer = (const char*)dispatcher().glGetString(GL_RENDERER);
32 size_t baseRendererLen = strlen(baseRenderer);
33 s_glRenderer.clear();
34 s_glRenderer.reserve(16 + baseRendererLen);
35 s_glRenderer.append("OpenGL ES 2.0 (", 15);
36 s_glRenderer.append(baseRenderer, baseRendererLen);
37 s_glRenderer.append(")", 1);
38 }
39 m_initialized = true;
40 }
41
GLESv2Context()42 GLESv2Context::GLESv2Context():GLEScontext(), m_att0Array(NULL), m_att0ArrayLength(0), m_att0NeedsDisable(false){};
43
~GLESv2Context()44 GLESv2Context::~GLESv2Context()
45 {
46 delete[] m_att0Array;
47 }
48
setAttribute0value(float x,float y,float z,float w)49 void GLESv2Context::setAttribute0value(float x, float y, float z, float w)
50 {
51 m_attribute0value[0] = x;
52 m_attribute0value[1] = y;
53 m_attribute0value[2] = z;
54 m_attribute0value[3] = w;
55 }
56
validateAtt0PreDraw(unsigned int count)57 void GLESv2Context::validateAtt0PreDraw(unsigned int count)
58 {
59 m_att0NeedsDisable = false;
60
61 if(count == 0)
62 return;
63
64 int enabled = 0;
65 s_glDispatch.glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &enabled);
66 if(enabled)
67 return;
68
69 if(count > m_att0ArrayLength)
70 {
71 delete [] m_att0Array;
72 m_att0Array = new GLfloat[4*count];
73 m_att0ArrayLength = count;
74 }
75
76 for(unsigned int i=0; i<count; i++)
77 memcpy(m_att0Array+i*4, m_attribute0value, 4*sizeof(GLfloat));
78
79 s_glDispatch.glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, m_att0Array);
80 s_glDispatch.glEnableVertexAttribArray(0);
81
82 m_att0NeedsDisable = true;
83 }
84
validateAtt0PostDraw(void)85 void GLESv2Context::validateAtt0PostDraw(void)
86 {
87 if(m_att0NeedsDisable)
88 s_glDispatch.glDisableVertexAttribArray(0);
89
90 m_att0NeedsDisable = false;
91 }
92
setupArraysPointers(GLESConversionArrays & cArrs,GLint first,GLsizei count,GLenum type,const GLvoid * indices,bool direct)93 void GLESv2Context::setupArraysPointers(GLESConversionArrays& cArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct) {
94 ArraysMap::iterator it;
95
96 //going over all clients arrays Pointers
97 for ( it=m_map.begin() ; it != m_map.end(); it++ ) {
98 GLenum array_id = (*it).first;
99 GLESpointer* p = (*it).second;
100 if(!isArrEnabled(array_id)) continue;
101
102 unsigned int size = p->getSize();
103
104 if(needConvert(cArrs,first,count,type,indices,direct,p,array_id)){
105 //conversion has occured
106 ArrayData currentArr = cArrs.getCurrentArray();
107 setupArr(currentArr.data,array_id,currentArr.type,size,currentArr.stride, p->getNormalized());
108 ++cArrs;
109 } else {
110 setupArr(p->getData(),array_id,p->getType(),
111 size,p->getStride(), p->getNormalized());
112 }
113 }
114 }
115
116 //setting client side arr
setupArr(const GLvoid * arr,GLenum arrayType,GLenum dataType,GLint size,GLsizei stride,GLboolean normalized,int index)117 void GLESv2Context::setupArr(const GLvoid* arr,GLenum arrayType,GLenum dataType,GLint size,GLsizei stride,GLboolean normalized, int index){
118 if(arr == NULL) return;
119 s_glDispatch.glVertexAttribPointer(arrayType,size,dataType,normalized,stride,arr);
120 }
121
needConvert(GLESConversionArrays & cArrs,GLint first,GLsizei count,GLenum type,const GLvoid * indices,bool direct,GLESpointer * p,GLenum array_id)122 bool GLESv2Context::needConvert(GLESConversionArrays& cArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct,GLESpointer* p,GLenum array_id) {
123
124 bool usingVBO = p->isVBO();
125 GLenum arrType = p->getType();
126 /*
127 conversion is not necessary in the following cases:
128 (*) array type is not fixed
129 */
130 if(arrType != GL_FIXED) return false;
131
132 if(!usingVBO) {
133 if (direct) {
134 convertDirect(cArrs,first,count,array_id,p);
135 } else {
136 convertIndirect(cArrs,count,type,indices,array_id,p);
137 }
138 } else {
139 if (direct) {
140 convertDirectVBO(cArrs,first,count,array_id,p) ;
141 } else {
142 convertIndirectVBO(cArrs,count,type,indices,array_id,p);
143 }
144 }
145 return true;
146 }
147
initExtensionString()148 void GLESv2Context::initExtensionString() {
149 *s_glExtensions = "GL_OES_EGL_image GL_OES_depth24 GL_OES_depth32 GL_OES_element_index_uint "
150 "GL_OES_texture_float GL_OES_texture_float_linear "
151 "GL_OES_compressed_paletted_texture GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth_texture ";
152 if (s_glSupport.GL_ARB_HALF_FLOAT_PIXEL || s_glSupport.GL_NV_HALF_FLOAT)
153 *s_glExtensions+="GL_OES_texture_half_float GL_OES_texture_half_float_linear ";
154 if (s_glSupport.GL_EXT_PACKED_DEPTH_STENCIL)
155 *s_glExtensions+="GL_OES_packed_depth_stencil ";
156 if (s_glSupport.GL_ARB_HALF_FLOAT_VERTEX)
157 *s_glExtensions+="GL_OES_vertex_half_float ";
158 if (s_glSupport.GL_OES_STANDARD_DERIVATIVES)
159 *s_glExtensions+="GL_OES_standard_derivatives ";
160 }
161
getMaxTexUnits()162 int GLESv2Context::getMaxTexUnits() {
163 return getCaps()->maxTexImageUnits;
164 }
165