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presentation: bool integer_scale -> enum PresentationMode (integer_scale|letterbox|stretched|overscan) amb migracio de configs antics

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This commit is contained in:
Sergio Valor
2026-05-19 20:29:22 +02:00
parent ac997c185d
commit 20325ddd5a
8 changed files with 214 additions and 69 deletions
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source/core/rendering/sdl3gpu/sdl3gpu_shader.cpp
+41 -14
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@@ -292,21 +292,48 @@ namespace Rendering {
// computeViewport — dimensions lògiques del canvas dins del swapchain (letterbox)
// ---------------------------------------------------------------------------
auto SDL3GPUShader::computeViewport(Uint32 sw, Uint32 sh) const -> Viewport {
const auto SWF = static_cast<float>(sw);
const auto SHF = static_cast<float>(sh);
const float CANVAS_RATIO = static_cast<float>(game_width_) / static_cast<float>(game_height_);
const float WINDOW_RATIO = SWF / SHF;
float vw = 0.0F;
float vh = 0.0F;
if (integer_scale_) {
const int SCALE = std::max(1, std::min(static_cast<int>(sw) / game_width_, static_cast<int>(sh) / game_height_));
vw = static_cast<float>(game_width_ * SCALE);
vh = static_cast<float>(game_height_ * SCALE);
} else {
const float SCALE = std::min(
static_cast<float>(sw) / static_cast<float>(game_width_),
static_cast<float>(sh) / static_cast<float>(game_height_));
vw = static_cast<float>(game_width_) * SCALE;
vh = static_cast<float>(game_height_) * SCALE;
switch (presentation_mode_) {
case PresentationMode::INTEGER_SCALE: {
const int SCALE = std::max(1, std::min(static_cast<int>(sw) / game_width_, static_cast<int>(sh) / game_height_));
vw = static_cast<float>(game_width_ * SCALE);
vh = static_cast<float>(game_height_ * SCALE);
break;
}
case PresentationMode::LETTERBOX: {
if (WINDOW_RATIO >= CANVAS_RATIO) {
vh = SHF;
vw = SHF * CANVAS_RATIO;
} else {
vw = SWF;
vh = SWF / CANVAS_RATIO;
}
break;
}
case PresentationMode::STRETCHED: {
vw = SWF;
vh = SHF;
break;
}
case PresentationMode::OVERSCAN: {
if (WINDOW_RATIO >= CANVAS_RATIO) {
vw = SWF;
vh = SWF / CANVAS_RATIO;
} else {
vh = SHF;
vw = SHF * CANVAS_RATIO;
}
break;
}
}
const float VX = std::floor((static_cast<float>(sw) - vw) * 0.5F);
const float VY = std::floor((static_cast<float>(sh) - vh) * 0.5F);
const float VX = std::floor((SWF - vw) * 0.5F);
const float VY = std::floor((SHF - vh) * 0.5F);
return {.x = VX, .y = VY, .w = vw, .h = vh};
}
@@ -569,8 +596,8 @@ namespace Rendering {
}
}
void SDL3GPUShader::setScaleMode(bool integer_scale) {
integer_scale_ = integer_scale;
void SDL3GPUShader::setPresentationMode(PresentationMode mode) {
presentation_mode_ = mode;
}
// ---------------------------------------------------------------------------