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Merge pull request #9691 from Enyby/patch-2

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Update gpu_features.cpp
This commit is contained in:
Henrik Rydgård 2017-05-17 10:58:25 +02:00 committed by GitHub
commit 661d8f8a2a
1 changed files with 18 additions and 10 deletions
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28
ext/native/gfx_es2/gpu_features.cpp
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@ -146,19 +146,27 @@ void CheckGLExtensions() {
if (versionStr) {
strncpy(buffer, versionStr, 63);
}
const char *lastNumStart = buffer;
int numVer = 0;
// Start by assuming we're at 2.0.
gl_extensions.ver[0] = 2;
int len = (int)strlen(buffer);
for (int i = 0; i < len && numVer < 3; i++) {
if (buffer[i] == '.') {
buffer[i] = 0;
gl_extensions.ver[numVer++] = strtol(lastNumStart, NULL, 10);
i++;
lastNumStart = buffer + i;
bool beforeDot = true;
int lastDigit = 0;
for (int i = 0; i < len; i++) {
if (buffer[i] >= '0' && buffer[i] <= '9') {
lastDigit = buffer[i] - '0';
if (!beforeDot) {
gl_extensions.ver[1] = lastDigit;
break;
}
}
if (beforeDot && buffer[i] == '.' && lastDigit) {
gl_extensions.ver[0] = lastDigit;
beforeDot = false;
}
}
if (numVer < 3)
gl_extensions.ver[numVer++] = strtol(lastNumStart, NULL, 10);
if (beforeDot && lastDigit) {
gl_extensions.ver[0] = lastDigit;
}
// If the GL version >= 4.3, we know it's a true superset of OpenGL ES 3.0 and can thus enable
// all the same modern paths.