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Screen layouts: Add configurable screen sizes

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wheremyfoodat 2025-07-05 02:36:03 +03:00
parent 62748eef47
commit 1c0f65c740
4 changed files with 92 additions and 89 deletions
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147
include/PICA/screen_layout.hpp
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@ -42,115 +42,114 @@ namespace ScreenLayout {
int destWidth = TOP_SCREEN_WIDTH;
int destHeight = CONSOLE_HEIGHT;
} singleBlitInfo;
float scale = 1.0f;
};
// Calculate screen coordinates on the screen for a given layout & a given size for the output window
// Used in both the renderers and in the frontends (To eg calculate touch screen boundaries)
static void calculateCoordinates(WindowCoordinates& coordinates, u32 outputWindowWidth, u32 outputWindowHeight, Layout layout) {
layout = Layout::SideBySideFlipped;
const float topScreenPercentage = 0.5f;
const float destAspect = float(outputWindowWidth) / float(outputWindowHeight);
if (layout == Layout::Default || layout == Layout::DefaultFlipped) {
const float srcAspect = 400.0 / 480.0;
// Calculate available height for each screen based on split
int availableTopHeight = int(outputWindowHeight * topScreenPercentage + 0.5f);
int availableBottomHeight = outputWindowHeight - availableTopHeight;
int destX = 0, destY = 0, destWidth = outputWindowWidth, destHeight = outputWindowHeight;
// Calculate scales for top and bottom screens, and then the actual sizes
float scaleTopX = float(outputWindowWidth) / float(TOP_SCREEN_WIDTH);
float scaleTopY = float(availableTopHeight) / float(TOP_SCREEN_HEIGHT);
float scaleTop = std::min(scaleTopX, scaleTopY);
if (destAspect > srcAspect) {
// Window is wider than source
destWidth = int(outputWindowHeight * srcAspect + 0.5f);
destX = (outputWindowWidth - destWidth) / 2;
} else {
// Window is taller than source
destHeight = int(outputWindowWidth / srcAspect + 0.5f);
destY = (outputWindowHeight - destHeight) / 2;
}
float scaleBottomX = float(outputWindowWidth) / float(BOTTOM_SCREEN_WIDTH);
float scaleBottomY = float(availableBottomHeight) / float(BOTTOM_SCREEN_HEIGHT);
float scaleBottom = std::min(scaleBottomX, scaleBottomY);
// How much we'll scale the output by
const float scale = float(destWidth) / float(TOP_SCREEN_WIDTH);
int topScreenWidth = int(TOP_SCREEN_WIDTH * scaleTop + 0.5f);
int topScreenHeight = int(TOP_SCREEN_HEIGHT * scaleTop + 0.5f);
// Calculate coordinates and return them
// TODO: This will break when we allow screens to be scaled separately
coordinates.topScreenX = u32(destX);
coordinates.topScreenWidth = u32(float(TOP_SCREEN_WIDTH) * scale);
coordinates.bottomScreenX = u32(destX) + BOTTOM_SCREEN_X_OFFSET * scale;
coordinates.bottomScreenWidth = u32(float(BOTTOM_SCREEN_WIDTH) * scale);
int bottomScreenWidth = int(BOTTOM_SCREEN_WIDTH * scaleBottom + 0.5f);
int bottomScreenHeight = int(BOTTOM_SCREEN_HEIGHT * scaleBottom + 0.5f);
// Center screens horizontally
int topScreenX = (outputWindowWidth - topScreenWidth) / 2;
int bottomScreenX = (outputWindowWidth - bottomScreenWidth) / 2;
coordinates.topScreenWidth = topScreenWidth;
coordinates.topScreenHeight = topScreenHeight;
coordinates.bottomScreenWidth = bottomScreenWidth;
coordinates.bottomScreenHeight = bottomScreenHeight;
coordinates.topScreenX = topScreenX;
coordinates.bottomScreenX = bottomScreenX;
if (layout == Layout::Default) {
coordinates.topScreenY = u32(destY + (destHeight - int(CONSOLE_HEIGHT * scale)) / 2);
coordinates.topScreenHeight = u32(float(TOP_SCREEN_HEIGHT) * scale);
coordinates.bottomScreenY = coordinates.topScreenY + TOP_SCREEN_HEIGHT * scale;
coordinates.bottomScreenHeight = coordinates.topScreenHeight;
coordinates.topScreenY = 0;
coordinates.bottomScreenY = topScreenHeight;
} else {
// Flip the screens vertically
coordinates.bottomScreenY = u32(destY + (destHeight - int(CONSOLE_HEIGHT * scale)) / 2);
coordinates.bottomScreenHeight = u32(float(BOTTOM_SCREEN_HEIGHT) * scale);
coordinates.topScreenY = coordinates.bottomScreenY + TOP_SCREEN_HEIGHT * scale;
coordinates.topScreenHeight = coordinates.bottomScreenHeight;
coordinates.bottomScreenY = 0;
coordinates.topScreenY = bottomScreenHeight;
}
coordinates.windowWidth = outputWindowWidth;
coordinates.windowHeight = outputWindowHeight;
coordinates.scale = scale;
coordinates.singleBlitInfo.destX = destX;
coordinates.singleBlitInfo.destY = destY;
coordinates.singleBlitInfo.destWidth = destWidth;
coordinates.singleBlitInfo.destHeight = destHeight;
} else if (layout == Layout::SideBySide || layout == Layout::SideBySideFlipped) {
// For side-by-side layouts, the 3DS aspect ratio is calculated as (top width + bottom width) / height
const float srcAspect = float(TOP_SCREEN_WIDTH + BOTTOM_SCREEN_WIDTH) / float(CONSOLE_HEIGHT);
int destX = 0, destY = 0, destWidth = outputWindowWidth, destHeight = outputWindowHeight;
if (destAspect > srcAspect) {
// Window is wider than the side-by-side layout — center horizontally
destWidth = int(outputWindowHeight * srcAspect + 0.5f);
destX = (outputWindowWidth - destWidth) / 2;
// Default layout can be rendered using a single blit, flipped layout can't
if (layout == Layout::Default) {
coordinates.singleBlitInfo.destX = coordinates.topScreenX;
coordinates.singleBlitInfo.destY = coordinates.topScreenY;
coordinates.singleBlitInfo.destWidth = coordinates.topScreenWidth;
coordinates.singleBlitInfo.destHeight = coordinates.topScreenHeight + coordinates.bottomScreenHeight;
} else {
// Window is taller — center vertically
destHeight = int(outputWindowWidth / srcAspect + 0.5f);
destY = (outputWindowHeight - destHeight) / 2;
// Dummy data for the single blit info, as we can't render the screen in 1 blit when the screens are side-by-sid
coordinates.singleBlitInfo.destX = 0;
coordinates.singleBlitInfo.destY = 0;
coordinates.singleBlitInfo.destWidth = 0;
coordinates.singleBlitInfo.destHeight = 0;
}
} else if (layout == Layout::SideBySide || layout == Layout::SideBySideFlipped) {
// Calculate available width for each screen based on split
int availableTopWidth = int(outputWindowWidth * topScreenPercentage + 0.5f);
int availableBottomWidth = outputWindowWidth - availableTopWidth;
// How much we'll scale the output by. Again, we want to take both screens into account
const float scale = float(destWidth) / float(TOP_SCREEN_WIDTH + BOTTOM_SCREEN_WIDTH);
// Calculate scales for top and bottom screens, and then the actual sizes
float scaleTop = std::min(float(availableTopWidth) / float(TOP_SCREEN_WIDTH), float(outputWindowHeight) / float(TOP_SCREEN_HEIGHT));
float scaleBottom =
std::min(float(availableBottomWidth) / float(BOTTOM_SCREEN_WIDTH), float(outputWindowHeight) / float(BOTTOM_SCREEN_HEIGHT));
// Annoyingly, the top screen is wider than the bottom screen, so to display them side-by-side and centered
// vertically, we have to account for that
int topScreenWidth = int(TOP_SCREEN_WIDTH * scaleTop + 0.5f);
int topScreenHeight = int(TOP_SCREEN_HEIGHT * scaleTop + 0.5f);
int bottomScreenWidth = int(BOTTOM_SCREEN_WIDTH * scaleBottom + 0.5f);
int bottomScreenHeight = int(BOTTOM_SCREEN_HEIGHT * scaleBottom + 0.5f);
// The top screen is currently always larger, but it's still best to check which screen is taller anyways
// Since eventually we'll want to let users scale each screen separately.
const int topHeightScaled = int(TOP_SCREEN_HEIGHT * scale + 0.5f);
const int bottomHeightScaled = int(BOTTOM_SCREEN_HEIGHT * scale + 0.5f);
const int maxHeight = std::max(topHeightScaled, bottomHeightScaled);
const int centerY = destY + (destHeight - maxHeight) / 2;
// Vertically center the tallest screen
int maxHeight = std::max(topScreenHeight, bottomScreenHeight);
int baseY = (outputWindowHeight - maxHeight) / 2;
coordinates.topScreenY = u32(centerY + (maxHeight - topHeightScaled) / 2);
coordinates.topScreenWidth = u32(TOP_SCREEN_WIDTH * scale);
coordinates.topScreenHeight = u32(TOP_SCREEN_HEIGHT * scale);
coordinates.bottomScreenY = u32(centerY + (maxHeight - bottomHeightScaled) / 2);
coordinates.bottomScreenWidth = u32(BOTTOM_SCREEN_WIDTH * scale);
coordinates.bottomScreenHeight = u32(BOTTOM_SCREEN_HEIGHT * scale);
int topScreenY = baseY + (maxHeight - topScreenHeight) / 2;
int bottomScreenY = baseY + (maxHeight - bottomScreenHeight) / 2;
if (layout == Layout::SideBySide) {
coordinates.topScreenX = destX;
coordinates.bottomScreenX = destX + coordinates.topScreenWidth;
coordinates.topScreenX = (outputWindowWidth - (topScreenWidth + bottomScreenWidth)) / 2;
coordinates.bottomScreenX = coordinates.topScreenX + topScreenWidth;
} else {
// Flip the screens horizontally
coordinates.bottomScreenX = destX;
coordinates.topScreenX = destX + coordinates.bottomScreenWidth;
coordinates.bottomScreenX = (outputWindowWidth - (topScreenWidth + bottomScreenWidth)) / 2;
coordinates.topScreenX = coordinates.bottomScreenX + bottomScreenWidth;
}
coordinates.topScreenY = topScreenY;
coordinates.topScreenWidth = topScreenWidth;
coordinates.topScreenHeight = topScreenHeight;
coordinates.bottomScreenY = bottomScreenY;
coordinates.bottomScreenWidth = bottomScreenWidth;
coordinates.bottomScreenHeight = bottomScreenHeight;
coordinates.windowWidth = outputWindowWidth;
coordinates.windowHeight = outputWindowHeight;
coordinates.scale = scale;
// Set singleBlitInfo values to dummy values. Side-by-side screens can't be rendere in only 1 blit.
// Dummy data for the single blit info, as we can't render the screen in 1 blit when the screens are side-by-side
coordinates.singleBlitInfo.destX = 0;
coordinates.singleBlitInfo.destY = 0;
coordinates.singleBlitInfo.destWidth = 0;