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fix keep_previous not working

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This commit is contained in:
Mylloon 2023-05-21 14:04:05 +02:00
parent 8bf972d316
commit ef7bf82a82
Signed by: Anri
GPG key ID: A82D63DFF8D1317F
1 changed files with 37 additions and 19 deletions
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56
src/font.c
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@ -17,29 +17,15 @@ int initFont(TTF_Font **font, char *filename, int size) {
int writeText(GLuint *_textTexId, TTF_Font *font, const char *text,
SDL_Color color, GLboolean keep_previous) {
SDL_Surface *d, *s;
// Create text
if (!(d = TTF_RenderUTF8_Blended_Wrapped(font, text, color, 0))) {
freeFont(font);
fprintf(stderr, "Erreur TTF : TTF_RenderUTF8_Blended_Wrapped\n");
return 1;
}
GLint w, h;
if (keep_previous) {
glBindTexture(GL_TEXTURE_2D, *_textTexId);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &w);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &h);
} else {
// Aucune texture existante déjà créer
glGenTextures(1, _textTexId);
assert(_textTexId);
glBindTexture(GL_TEXTURE_2D, *_textTexId);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
w = d->w, h = d->h;
}
if (!(s = SDL_CreateRGBSurface(0, w, h, 32, R_MASK, G_MASK, B_MASK,
// Surface finale
if (!(s = SDL_CreateRGBSurface(0, d->w, d->h, 32, R_MASK, G_MASK, B_MASK,
A_MASK))) {
freeFont(font);
fprintf(stderr, "Erreur SDL : %s\n", SDL_GetError());
@ -47,18 +33,50 @@ int writeText(GLuint *_textTexId, TTF_Font *font, const char *text,
}
if (keep_previous) {
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, s->pixels);
// On garde la texture déjà présente
assert(_textTexId);
glBindTexture(GL_TEXTURE_2D, *_textTexId);
GLint w, h;
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &w);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &h);
// Surface qui va garder les données de la texture
SDL_Surface *old;
if (!(old = SDL_CreateRGBSurface(0, w, h, 32, R_MASK, G_MASK, B_MASK,
A_MASK))) {
freeFont(font);
fprintf(stderr, "Erreur SDL : %s\n", SDL_GetError());
return 2;
}
// Copie des données
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, old->pixels);
// Scale les données sur la même taille que la surface finale
SDL_BlitScaled(old, NULL, s, NULL);
SDL_FreeSurface(old);
} else {
// Aucune texture existante, donc on la créée
glGenTextures(1, _textTexId);
assert(_textTexId);
glBindTexture(GL_TEXTURE_2D, *_textTexId);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
// Copie le texte sur la surface finale
SDL_BlitSurface(d, NULL, s, NULL);
SDL_FreeSurface(d);
// Copie la surface dans la texture
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, s->w, s->h, 0, GL_RGBA,
GL_UNSIGNED_BYTE, s->pixels);
SDL_FreeSurface(s);
glBindTexture(GL_TEXTURE_2D, 0);
return 0;
}