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transparency support (WIP)

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This commit is contained in:
Mylloon 2022-05-09 14:31:41 +02:00
parent 94d34336ae
commit 0f56b3386d
Signed by: Anri
GPG key ID: A82D63DFF8D1317F
1 changed files with 12 additions and 11 deletions
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23
src/quadtree.cpp
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@ -31,7 +31,7 @@ SDL_Surface * QuadTree::image(short niveau_p) {
SDL_Surface * couleur_unie = SDL_CreateRGBSurface(0, dimensions.first, dimensions.second, 32, r_mask, g_mask, b_mask, a_mask); SDL_Surface * couleur_unie = SDL_CreateRGBSurface(0, dimensions.first, dimensions.second, 32, r_mask, g_mask, b_mask, a_mask);
if(SDL_LockSurface(couleur_unie) == 0) { if(SDL_LockSurface(couleur_unie) == 0) {
SDL_memset(couleur_unie->pixels, static_cast<int>( SDL_memset(couleur_unie->pixels, static_cast<int>(
SDL_MapRGB(couleur_unie->format, couleur.r, couleur.g, couleur.b) SDL_MapRGBA(couleur_unie->format, couleur.r, couleur.g, couleur.b, 255)
), static_cast<size_t>(couleur_unie->h * couleur_unie->pitch)); ), static_cast<size_t>(couleur_unie->h * couleur_unie->pitch));
SDL_UnlockSurface(couleur_unie); SDL_UnlockSurface(couleur_unie);
@ -51,30 +51,31 @@ SDL_Surface * QuadTree::image(short niveau_p) {
} }
SDL_Color QuadTree::calculeCouleur(SDL_Surface * s) { SDL_Color QuadTree::calculeCouleur(SDL_Surface * s) {
int r = 0, g = 0, b = 0; int r = 0, g = 0, b = 0, a = 0;
if(SDL_LockSurface(s) == 0) { if(SDL_LockSurface(s) == 0) {
for(int x = 0; x < s->w; ++x) { for(int x = 0; x < s->w; ++x) {
for(int y = 0; y < s->h; ++y) { for(int y = 0; y < s->h; ++y) {
Uint8 r_temp, g_temp, b_temp; Uint8 r_temp, g_temp, b_temp, a_temp;
SDL_GetRGB(*reinterpret_cast<Uint32 *>( SDL_GetRGBA(*reinterpret_cast<Uint32 *>(
static_cast<Uint8 *>(s->pixels) + y * s->pitch + x * s->format->BytesPerPixel static_cast<Uint8 *>(s->pixels) + y * s->pitch + x * s->format->BytesPerPixel
), s->format, &r_temp, &g_temp, &b_temp); ), s->format, &r_temp, &g_temp, &b_temp, &a_temp);
r += r_temp; r += r_temp;
g += g_temp; g += g_temp;
b += b_temp; b += b_temp;
a += a_temp;
} }
} }
SDL_UnlockSurface(s); SDL_UnlockSurface(s);
} }
SDL_Color color;
int diviseur = s->w * s->h; int diviseur = s->w * s->h;
color.r = floor(r / diviseur); return SDL_Color{
color.g = floor(g / diviseur); static_cast<Uint8>(r / diviseur),
color.b = floor(b / diviseur); static_cast<Uint8>(g / diviseur),
static_cast<Uint8>(b / diviseur),
return color; static_cast<Uint8>(a / diviseur),
};
} }
bool QuadTree::verificationEgalitee(SDL_Surface * s) { bool QuadTree::verificationEgalitee(SDL_Surface * s) {