Import EGL/GLES translator

external/android-emugl/host/libs/Translator/GLES_V2/GLESv2Context.cpp

@@ -0,0 +1,175 @@
+/*
+* 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(GlLibrary* glLib) {
+    emugl::Mutex::AutoLock mutex(s_lock);
+    if(!m_initialized) {
+        s_glDispatch.dispatchFuncs(GLES_2_0, glLib);
+        GLEScontext::init(glLib);
+        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_EGL_image_external 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 ";
+    if (s_glSupport.GL_OES_TEXTURE_NPOT)
+        *s_glExtensions+="GL_OES_texture_npot ";
+    if (s_glSupport.GL_OES_RGB8_RGBA8) {
+        *s_glExtensions+="GL_OES_rgb8_rgba8 ";
+    }
+}
+
+int GLESv2Context::getMaxTexUnits() {
+    return getCaps()->maxTexImageUnits;
+}
+
+int GLESv2Context::getMaxCombinedTexUnits() {
+    // GLES spec requires only 2, and the ATI driver erronously
+    // returns 32 (although it supports only 16). This WAR is simple,
+    // compliant and good enough for developers.
+    if (getCaps()->maxCombinedTexImageUnits > 16)
+        return 16;
+    return getCaps()->maxCombinedTexImageUnits;
+}