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Review OpenGL ES 2.0 extensions check

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This commit is contained in:
raysan5 2019-08-20 19:33:46 +02:00
parent bf0db83134
commit a727f5768f
1 changed files with 17 additions and 6 deletions
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23
src/rlgl.h
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@ -1529,24 +1529,33 @@ void rlglInit(int width, int height)
const char **extList = RL_MALLOC(sizeof(const char *)*numExt);
// Get extensions strings
for (int i = 0; i < numExt; i++) extList[i] = (char *)glGetStringi(GL_EXTENSIONS, i);
for (int i = 0; i < numExt; i++) extList[i] = (const char *)glGetStringi(GL_EXTENSIONS, i);
#elif defined(GRAPHICS_API_OPENGL_ES2)
// Allocate 512 strings pointers (2 KB)
const char **extList = RL_MALLOC(sizeof(const char *)*512);
const char *extensions = (const char *)glGetString(GL_EXTENSIONS); // One big const string
// NOTE: We have to duplicate string because glGetString() returns a const string
int len = strlen(extensions) + 1;
char *extensionsDup = (char *)RL_CALLOC(len, 1);
strcpy(extensionsDup, extensions);
// Get extensions strings
char *extensions = (char *)glGetString(GL_EXTENSIONS); // One big static const string returned
int len = strlen(extensions);
extList[numExt] = extensionsDup;
for (int i = 0; i < len; i++)
{
if (i == ' ')
if (extensionsDup[i] == ' ')
{
extList[numExt] = &extensions[i + 1];
extensionsDup[i] = '\0';
numExt++;
extList[numExt] = &extensionsDup[i + 1];
}
}
// NOTE: Duplicated string (extensionsDup) must be deallocated
#endif
TraceLog(LOG_INFO, "Number of supported extensions: %i", numExt);
@ -1622,6 +1631,8 @@ void rlglInit(int width, int height)
RL_FREE(extList);
#if defined(GRAPHICS_API_OPENGL_ES2)
RL_FREE(extensionsDup); // Duplicated string must be deallocated
if (vaoSupported) TraceLog(LOG_INFO, "[EXTENSION] VAO extension detected, VAO functions initialized successfully");
else TraceLog(LOG_WARNING, "[EXTENSION] VAO extension not found, VAO usage not supported");