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Mobile-"ish" emscripten support

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Full screen "wasm-game" for viewport compatibility between desktop and
web interfaces. Viewport modes ("fit", "center", and "stretch") should
now work the same way under WASM/SDL and SFML. This should also enable
android or web-for-mobile aspect ratios to be supported more easily.
This commit is contained in:
John McCardle 2026-02-09 08:40:34 -05:00
commit 726a9cf09d
9 changed files with 282 additions and 46 deletions
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43
src/SceneTransition.cpp
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@ -6,15 +6,15 @@ void SceneTransition::start(TransitionType t, const std::string& from, const std
toScene = to;
duration = dur;
elapsed = 0.0f;
// Initialize render textures if needed
if (!oldSceneTexture) {
oldSceneTexture = std::make_unique<sf::RenderTexture>();
oldSceneTexture->create(1024, 768);
oldSceneTexture->create(width, height);
}
if (!newSceneTexture) {
newSceneTexture = std::make_unique<sf::RenderTexture>();
newSceneTexture->create(1024, 768);
newSceneTexture->create(width, height);
}
}
@ -25,14 +25,17 @@ void SceneTransition::update(float dt) {
void SceneTransition::render(sf::RenderTarget& target) {
if (type == TransitionType::None) return;
float progress = getProgress();
float easedProgress = easeInOut(progress);
float w = static_cast<float>(width);
float h = static_cast<float>(height);
// Update sprites with current textures
oldSprite.setTexture(oldSceneTexture->getTexture());
newSprite.setTexture(newSceneTexture->getTexture());
switch (type) {
case TransitionType::Fade:
// Fade out old scene, fade in new scene
@ -41,39 +44,39 @@ void SceneTransition::render(sf::RenderTarget& target) {
target.draw(oldSprite);
target.draw(newSprite);
break;
case TransitionType::SlideLeft:
// Old scene slides out to left, new scene slides in from right
oldSprite.setPosition(-1024 * easedProgress, 0);
newSprite.setPosition(1024 * (1.0f - easedProgress), 0);
oldSprite.setPosition(-w * easedProgress, 0);
newSprite.setPosition(w * (1.0f - easedProgress), 0);
target.draw(oldSprite);
target.draw(newSprite);
break;
case TransitionType::SlideRight:
// Old scene slides out to right, new scene slides in from left
oldSprite.setPosition(1024 * easedProgress, 0);
newSprite.setPosition(-1024 * (1.0f - easedProgress), 0);
oldSprite.setPosition(w * easedProgress, 0);
newSprite.setPosition(-w * (1.0f - easedProgress), 0);
target.draw(oldSprite);
target.draw(newSprite);
break;
case TransitionType::SlideUp:
// Old scene slides up, new scene slides in from bottom
oldSprite.setPosition(0, -768 * easedProgress);
newSprite.setPosition(0, 768 * (1.0f - easedProgress));
oldSprite.setPosition(0, -h * easedProgress);
newSprite.setPosition(0, h * (1.0f - easedProgress));
target.draw(oldSprite);
target.draw(newSprite);
break;
case TransitionType::SlideDown:
// Old scene slides down, new scene slides in from top
oldSprite.setPosition(0, 768 * easedProgress);
newSprite.setPosition(0, -768 * (1.0f - easedProgress));
oldSprite.setPosition(0, h * easedProgress);
newSprite.setPosition(0, -h * (1.0f - easedProgress));
target.draw(oldSprite);
target.draw(newSprite);
break;
default:
break;
}
@ -82,4 +85,4 @@ void SceneTransition::render(sf::RenderTarget& target) {
float SceneTransition::easeInOut(float t) {
// Smooth ease-in-out curve
return t < 0.5f ? 2 * t * t : -1 + (4 - 2 * t) * t;
}
}