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/*
* Copyright (C) 2011 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.
*/
#include "GLESv2Context.h"
#include <string.h>
void GLESv2Context::init() {
emugl::Mutex::AutoLock mutex(s_lock);
if(!m_initialized) {
s_glDispatch.dispatchFuncs(GLES_2_0);
GLEScontext::init();
for(int i=0; i < s_glSupport.maxVertexAttribs;i++){
m_map[i] = new GLESpointer();
}
setAttribute0value(0.0, 0.0, 0.0, 1.0);
buildStrings((const char*)dispatcher().glGetString(GL_VENDOR),
(const char*)dispatcher().glGetString(GL_RENDERER),
(const char*)dispatcher().glGetString(GL_VERSION),
"OpenGL ES 2.0");
}
m_initialized = true;
}
GLESv2Context::GLESv2Context():GLEScontext(), m_att0Array(NULL), m_att0ArrayLength(0), m_att0NeedsDisable(false){};
GLESv2Context::~GLESv2Context()
{
delete[] m_att0Array;
}
void GLESv2Context::setAttribute0value(float x, float y, float z, float w)
{
m_attribute0value[0] = x;
m_attribute0value[1] = y;
m_attribute0value[2] = z;
m_attribute0value[3] = w;
}
void GLESv2Context::validateAtt0PreDraw(unsigned int count)
{
m_att0NeedsDisable = false;
if(count == 0)
return;
int enabled = 0;
s_glDispatch.glGetVertexAttribiv(0, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &enabled);
if(enabled)
return;
if(count > m_att0ArrayLength)
{
delete [] m_att0Array;
m_att0Array = new GLfloat[4*count];
m_att0ArrayLength = count;
}
for(unsigned int i=0; i<count; i++)
memcpy(m_att0Array+i*4, m_attribute0value, 4*sizeof(GLfloat));
s_glDispatch.glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, m_att0Array);
s_glDispatch.glEnableVertexAttribArray(0);
m_att0NeedsDisable = true;
}
void GLESv2Context::validateAtt0PostDraw(void)
{
if(m_att0NeedsDisable)
s_glDispatch.glDisableVertexAttribArray(0);
m_att0NeedsDisable = false;
}
void GLESv2Context::setupArraysPointers(GLESConversionArrays& cArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct) {
ArraysMap::iterator it;
//going over all clients arrays Pointers
for ( it=m_map.begin() ; it != m_map.end(); it++ ) {
GLenum array_id = (*it).first;
GLESpointer* p = (*it).second;
if(!isArrEnabled(array_id)) continue;
unsigned int size = p->getSize();
if(needConvert(cArrs,first,count,type,indices,direct,p,array_id)){
//conversion has occured
ArrayData currentArr = cArrs.getCurrentArray();
setupArr(currentArr.data,array_id,currentArr.type,size,currentArr.stride, p->getNormalized());
++cArrs;
} else {
setupArr(p->getData(),array_id,p->getType(),
size,p->getStride(), p->getNormalized());
}
}
}
//setting client side arr
void GLESv2Context::setupArr(const GLvoid* arr,GLenum arrayType,GLenum dataType,GLint size,GLsizei stride,GLboolean normalized, int index){
if(arr == NULL) return;
s_glDispatch.glVertexAttribPointer(arrayType,size,dataType,normalized,stride,arr);
}
bool GLESv2Context::needConvert(GLESConversionArrays& cArrs,GLint first,GLsizei count,GLenum type,const GLvoid* indices,bool direct,GLESpointer* p,GLenum array_id) {
bool usingVBO = p->isVBO();
GLenum arrType = p->getType();
/*
conversion is not necessary in the following cases:
(*) array type is not fixed
*/
if(arrType != GL_FIXED) return false;
if(!usingVBO) {
if (direct) {
convertDirect(cArrs,first,count,array_id,p);
} else {
convertIndirect(cArrs,count,type,indices,array_id,p);
}
} else {
if (direct) {
convertDirectVBO(cArrs,first,count,array_id,p) ;
} else {
convertIndirectVBO(cArrs,count,type,indices,array_id,p);
}
}
return true;
}
void GLESv2Context::initExtensionString() {
*s_glExtensions = "GL_OES_EGL_image GL_OES_depth24 GL_OES_depth32 GL_OES_element_index_uint "
"GL_OES_texture_float GL_OES_texture_float_linear "
"GL_OES_compressed_paletted_texture GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth_texture ";
if (s_glSupport.GL_ARB_HALF_FLOAT_PIXEL || s_glSupport.GL_NV_HALF_FLOAT)
*s_glExtensions+="GL_OES_texture_half_float GL_OES_texture_half_float_linear ";
if (s_glSupport.GL_EXT_PACKED_DEPTH_STENCIL)
*s_glExtensions+="GL_OES_packed_depth_stencil ";
if (s_glSupport.GL_ARB_HALF_FLOAT_VERTEX)
*s_glExtensions+="GL_OES_vertex_half_float ";
if (s_glSupport.GL_OES_STANDARD_DERIVATIVES)
*s_glExtensions+="GL_OES_standard_derivatives ";
}
int GLESv2Context::getMaxTexUnits() {
return getCaps()->maxTexImageUnits;
}
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