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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 "GLClientState.h"
#include "ErrorLog.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "glUtils.h"
#include <cutils/log.h>
GLClientState::GLClientState(int nLocations)
{
if (nLocations < LAST_LOCATION) {
nLocations = LAST_LOCATION;
}
m_nLocations = nLocations;
m_states = new VertexAttribState[m_nLocations];
for (int i = 0; i < m_nLocations; i++) {
m_states[i].enabled = 0;
m_states[i].enableDirty = false;
}
m_currentArrayVbo = 0;
m_currentIndexVbo = 0;
// init gl constans;
m_states[VERTEX_LOCATION].glConst = GL_VERTEX_ARRAY;
m_states[NORMAL_LOCATION].glConst = GL_NORMAL_ARRAY;
m_states[COLOR_LOCATION].glConst = GL_COLOR_ARRAY;
m_states[POINTSIZE_LOCATION].glConst = GL_POINT_SIZE_ARRAY_OES;
m_states[TEXCOORD0_LOCATION].glConst = GL_TEXTURE_COORD_ARRAY;
m_states[TEXCOORD1_LOCATION].glConst = GL_TEXTURE_COORD_ARRAY;
m_states[TEXCOORD2_LOCATION].glConst = GL_TEXTURE_COORD_ARRAY;
m_states[TEXCOORD3_LOCATION].glConst = GL_TEXTURE_COORD_ARRAY;
m_states[TEXCOORD4_LOCATION].glConst = GL_TEXTURE_COORD_ARRAY;
m_states[TEXCOORD5_LOCATION].glConst = GL_TEXTURE_COORD_ARRAY;
m_states[TEXCOORD6_LOCATION].glConst = GL_TEXTURE_COORD_ARRAY;
m_states[TEXCOORD7_LOCATION].glConst = GL_TEXTURE_COORD_ARRAY;
m_states[MATRIXINDEX_LOCATION].glConst = GL_MATRIX_INDEX_ARRAY_OES;
m_states[WEIGHT_LOCATION].glConst = GL_WEIGHT_ARRAY_OES;
m_activeTexture = 0;
m_pixelStore.unpack_alignment = 4;
m_pixelStore.pack_alignment = 4;
}
GLClientState::~GLClientState()
{
delete m_states;
}
void GLClientState::enable(int location, int state)
{
if (!validLocation(location)) {
return;
}
m_states[location].enableDirty |= (state != m_states[location].enabled);
m_states[location].enabled = state;
}
void GLClientState::setState(int location, int size, GLenum type, GLboolean normalized, GLsizei stride, const void *data)
{
if (!validLocation(location)) {
return;
}
m_states[location].size = size;
m_states[location].type = type;
m_states[location].stride = stride;
m_states[location].data = (void*)data;
m_states[location].bufferObject = m_currentArrayVbo;
m_states[location].elementSize = glSizeof(type) * size;
m_states[location].normalized = normalized;
}
void GLClientState::setBufferObject(int location, GLuint id)
{
if (!validLocation(location)) {
return;
}
m_states[location].bufferObject = id;
}
const GLClientState::VertexAttribState * GLClientState::getState(int location)
{
if (!validLocation(location)) {
return NULL;
}
return & m_states[location];
}
const GLClientState::VertexAttribState * GLClientState::getStateAndEnableDirty(int location, bool *enableChanged)
{
if (!validLocation(location)) {
return NULL;
}
if (enableChanged) {
*enableChanged = m_states[location].enableDirty;
}
m_states[location].enableDirty = false;
return & m_states[location];
}
int GLClientState::getLocation(GLenum loc)
{
int retval;
switch(loc) {
case GL_VERTEX_ARRAY:
retval = int(VERTEX_LOCATION);
break;
case GL_NORMAL_ARRAY:
retval = int(NORMAL_LOCATION);
break;
case GL_COLOR_ARRAY:
retval = int(COLOR_LOCATION);
break;
case GL_POINT_SIZE_ARRAY_OES:
retval = int(POINTSIZE_LOCATION);
break;
case GL_TEXTURE_COORD_ARRAY:
retval = int (TEXCOORD0_LOCATION + m_activeTexture);
break;
case GL_MATRIX_INDEX_ARRAY_OES:
retval = int (MATRIXINDEX_LOCATION);
break;
case GL_WEIGHT_ARRAY_OES:
retval = int (WEIGHT_LOCATION);
break;
default:
retval = loc;
}
return retval;
}
void GLClientState::getClientStatePointer(GLenum pname, GLvoid** params)
{
const GLClientState::VertexAttribState *state = NULL;
switch (pname) {
case GL_VERTEX_ARRAY_POINTER: {
state = getState(GLClientState::VERTEX_LOCATION);
break;
}
case GL_NORMAL_ARRAY_POINTER: {
state = getState(GLClientState::NORMAL_LOCATION);
break;
}
case GL_COLOR_ARRAY_POINTER: {
state = getState(GLClientState::COLOR_LOCATION);
break;
}
case GL_TEXTURE_COORD_ARRAY_POINTER: {
state = getState(getActiveTexture() + GLClientState::TEXCOORD0_LOCATION);
break;
}
case GL_POINT_SIZE_ARRAY_POINTER_OES: {
state = getState(GLClientState::POINTSIZE_LOCATION);
break;
}
case GL_MATRIX_INDEX_ARRAY_POINTER_OES: {
state = getState(GLClientState::MATRIXINDEX_LOCATION);
break;
}
case GL_WEIGHT_ARRAY_POINTER_OES: {
state = getState(GLClientState::WEIGHT_LOCATION);
break;
}
}
if (state && params)
*params = state->data;
}
int GLClientState::setPixelStore(GLenum param, GLint value)
{
int retval = 0;
switch(param) {
case GL_UNPACK_ALIGNMENT:
if (value == 1 || value == 2 || value == 4 || value == 8) {
m_pixelStore.unpack_alignment = value;
} else {
retval = GL_INVALID_VALUE;
}
break;
case GL_PACK_ALIGNMENT:
if (value == 1 || value == 2 || value == 4 || value == 8) {
m_pixelStore.pack_alignment = value;
} else {
retval = GL_INVALID_VALUE;
}
break;
default:
retval = GL_INVALID_ENUM;
}
return retval;
}
size_t GLClientState::pixelDataSize(GLsizei width, GLsizei height, GLenum format, GLenum type, int pack) const
{
int pixelsize = glUtilsPixelBitSize(format, type) >> 3;
int alignment = pack ? m_pixelStore.pack_alignment : m_pixelStore.unpack_alignment;
if (pixelsize == 0 ) {
ERR("unknown pixel size: width: %d height: %d format: %d type: %d pack: %d align: %d\n",
width, height, format, type, pack, alignment);
}
size_t linesize = pixelsize * width;
size_t aligned_linesize = int(linesize / alignment) * alignment;
if (aligned_linesize < linesize) {
aligned_linesize += alignment;
}
return aligned_linesize * height;
}
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