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Sergio
2026-03-19 09:53:42 +01:00
parent c80dffe957
commit a7d04d2bbc
10 changed files with 352 additions and 32 deletions
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96
source/core/rendering/surface.cpp
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@@ -428,6 +428,102 @@ void Surface::renderWithColorReplace(int x, int y, Uint8 source_color, Uint8 tar
}
}
// Hash 2D estable per a dithering sense flickering
static auto pixelThreshold(int col, int row) -> float {
auto h = static_cast<uint32_t>(col) * 2246822519U ^ static_cast<uint32_t>(row) * 2654435761U;
h ^= (h >> 13);
h *= 1274126177U;
h ^= (h >> 16);
return static_cast<float>(h & 0xFFFFU) / 65536.0F;
}
// Render amb dissolució als cantons superior/inferior (hash 2D, sense parpelleig)
void Surface::renderWithVerticalFade(int x, int y, int fade_h, int canvas_height, SDL_FRect* src_rect) {
const int SX = src_rect ? static_cast<int>(src_rect->x) : 0;
const int SY = src_rect ? static_cast<int>(src_rect->y) : 0;
const int SW = src_rect ? static_cast<int>(src_rect->w) : static_cast<int>(surface_data_->width);
const int SH = src_rect ? static_cast<int>(src_rect->h) : static_cast<int>(surface_data_->height);
auto surface_data_dest = Screen::get()->getRendererSurface()->getSurfaceData();
for (int row = 0; row < SH; row++) {
const int SCREEN_Y = y + row;
if (SCREEN_Y < 0 || SCREEN_Y >= static_cast<int>(surface_data_dest->height)) {
continue;
}
float density = 0.0F;
if (SCREEN_Y < fade_h) {
density = static_cast<float>(fade_h - SCREEN_Y) / static_cast<float>(fade_h);
} else if (SCREEN_Y >= canvas_height - fade_h) {
density = static_cast<float>(SCREEN_Y - (canvas_height - fade_h)) / static_cast<float>(fade_h);
}
for (int col = 0; col < SW; col++) {
const int SCREEN_X = x + col;
if (SCREEN_X < 0 || SCREEN_X >= static_cast<int>(surface_data_dest->width)) {
continue;
}
const Uint8 COLOR = surface_data_->data[(SY + row) * static_cast<int>(surface_data_->width) + (SX + col)];
if (static_cast<int>(COLOR) == transparent_color_) {
continue;
}
if (pixelThreshold(col, row) < density) {
continue; // Pixel tapat per la zona de fade
}
surface_data_dest->data[SCREEN_X + (SCREEN_Y * static_cast<int>(surface_data_dest->width))] = sub_palette_[COLOR];
}
}
}
// Idem però reemplaçant un color índex
void Surface::renderWithVerticalFade(int x, int y, int fade_h, int canvas_height,
Uint8 source_color, Uint8 target_color,
SDL_FRect* src_rect) {
const int SX = src_rect ? static_cast<int>(src_rect->x) : 0;
const int SY = src_rect ? static_cast<int>(src_rect->y) : 0;
const int SW = src_rect ? static_cast<int>(src_rect->w) : static_cast<int>(surface_data_->width);
const int SH = src_rect ? static_cast<int>(src_rect->h) : static_cast<int>(surface_data_->height);
auto surface_data_dest = Screen::get()->getRendererSurface()->getSurfaceData();
for (int row = 0; row < SH; row++) {
const int SCREEN_Y = y + row;
if (SCREEN_Y < 0 || SCREEN_Y >= static_cast<int>(surface_data_dest->height)) {
continue;
}
float density = 0.0F;
if (SCREEN_Y < fade_h) {
density = static_cast<float>(fade_h - SCREEN_Y) / static_cast<float>(fade_h);
} else if (SCREEN_Y >= canvas_height - fade_h) {
density = static_cast<float>(SCREEN_Y - (canvas_height - fade_h)) / static_cast<float>(fade_h);
}
for (int col = 0; col < SW; col++) {
const int SCREEN_X = x + col;
if (SCREEN_X < 0 || SCREEN_X >= static_cast<int>(surface_data_dest->width)) {
continue;
}
const Uint8 COLOR = surface_data_->data[(SY + row) * static_cast<int>(surface_data_->width) + (SX + col)];
if (static_cast<int>(COLOR) == transparent_color_) {
continue;
}
if (pixelThreshold(col, row) < density) {
continue; // Pixel tapat per la zona de fade
}
const Uint8 OUT_COLOR = (COLOR == source_color) ? target_color : sub_palette_[COLOR];
surface_data_dest->data[SCREEN_X + (SCREEN_Y * static_cast<int>(surface_data_dest->width))] = OUT_COLOR;
}
}
}
// Vuelca la superficie a una textura
void Surface::copyToTexture(SDL_Renderer* renderer, SDL_Texture* texture) {
if ((renderer == nullptr) || (texture == nullptr) || !surface_data_) {