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Allow GL_ARB_texture_non_power_of_two environment variable to override OpenGL 2.0 check

This commit is contained in:
Sam Lantinga 2022-03-08 18:14:10 -08:00
parent 1b7669374e
commit b064ad6ac5
1 changed files with 20 additions and 13 deletions
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33
src/render/opengl/SDL_render_gl.c
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@ -1726,8 +1726,8 @@ GL_CreateRenderer(SDL_Window * window, Uint32 flags)
Uint32 window_flags;
int profile_mask = 0, major = 0, minor = 0;
SDL_bool changed_window = SDL_FALSE;
SDL_bool isGL2 = SDL_FALSE;
const char *verstr = NULL;
const char *hint;
SDL_bool non_power_of_two_supported = SDL_FALSE;
SDL_GL_GetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, &profile_mask);
SDL_GL_GetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, &major);
@ -1847,22 +1847,29 @@ GL_CreateRenderer(SDL_Window * window, Uint32 flags)
data->glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
}
verstr = (const char *) data->glGetString(GL_VERSION);
if (verstr) {
char verbuf[16];
char *ptr;
SDL_strlcpy(verbuf, verstr, sizeof (verbuf));
ptr = SDL_strchr(verbuf, '.');
if (ptr) {
*ptr = '\0';
if (SDL_atoi(verbuf) >= 2) {
isGL2 = SDL_TRUE;
hint = SDL_getenv("GL_ARB_texture_non_power_of_two");
if (!hint || *hint != '0') {
SDL_bool isGL2 = SDL_FALSE;
const char *verstr = (const char *)data->glGetString(GL_VERSION);
if (verstr) {
char verbuf[16];
char *ptr;
SDL_strlcpy(verbuf, verstr, sizeof (verbuf));
ptr = SDL_strchr(verbuf, '.');
if (ptr) {
*ptr = '\0';
if (SDL_atoi(verbuf) >= 2) {
isGL2 = SDL_TRUE;
}
}
}
if (isGL2 || SDL_GL_ExtensionSupported("GL_ARB_texture_non_power_of_two")) {
non_power_of_two_supported = SDL_TRUE;
}
}
data->textype = GL_TEXTURE_2D;
if (isGL2 || SDL_GL_ExtensionSupported("GL_ARB_texture_non_power_of_two")) {
if (non_power_of_two_supported) {
data->GL_ARB_texture_non_power_of_two_supported = SDL_TRUE;
data->glGetIntegerv(GL_MAX_TEXTURE_SIZE, &value);
renderer->info.max_texture_width = value;