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/**************************************************************************
*
* Copyright 2011 Jose Fonseca
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
**************************************************************************/
#include <assert.h>
#include <iostream>
#include "glproc.hpp"
#include "glws.hpp"
namespace glws {
void
getProfileDesc(Profile profile, ProfileDesc &desc)
{
desc.api = (profile & 0x200) == 0x200 ? API_GLES : API_GL;
desc.major = (profile >> 4) & 0xf;
desc.minor = profile & 0xf;
desc.core = (profile & 0x100) == 0x100;
}
bool
checkExtension(const char *extName, const char *extString)
{
assert(extName);
if (!extString) {
return false;
}
const char *p = extString;
const char *q = extName;
char c;
do {
c = *p++;
if (c == '\0' || c == ' ') {
if (q && *q == '\0') {
return true;
} else {
q = extName;
}
} else {
if (q && *q == c) {
++q;
} else {
q = 0;
}
}
} while (c);
return false;
}
void
Drawable::copySubBuffer(int x, int y, int width, int height) {
std::cerr << "warning: copySubBuffer not yet implemented\n";
}
bool
Context::hasExtension(const char *string) {
if (extensions.empty()) {
ProfileDesc desc;
getProfileDesc(profile, desc);
if (desc.major >= 3) {
// Use glGetStringi
GLint num_extensions = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &num_extensions);
assert(num_extensions);
for (int i = 0; i < num_extensions; ++i) {
const char *extension = reinterpret_cast<const char *>(glGetStringi(GL_EXTENSIONS, i));
assert(extension);
if (extension) {
extensions.insert(extension);
}
}
} else {
// Use glGetString
const char *begin = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS));
assert(begin);
do {
const char *end = begin;
char c = *end;
while (c != '\0' && c != ' ') {
++end;
c = *end;
}
if (end != begin) {
extensions.insert(std::string(begin, end));
}
if (c == '\0') {
break;
}
begin = end + 1;
} while(1);
}
}
return extensions.find(string) != extensions.end();
}
} /* namespace glws */
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