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3DS: Auto-fit aspect ratios

This commit is contained in:
Jeffrey Pfau 2016-02-16 01:13:27 -08:00
parent ea67f6bc75
commit 58c09c9124
1 changed files with 20 additions and 7 deletions
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27
src/platform/3ds/main.c
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@ -337,7 +337,17 @@ static void _drawTex(struct mCore* core, bool faded) {
unsigned corew, coreh;
core->desiredVideoDimensions(core, &corew, &coreh);
int w, h;
int w = corew;
int h = coreh;
// Get greatest common divisor
while (w != 0) {
int temp = h % w;
h = w;
w = temp;
}
int gcd = h;
int aspectw = corew / gcd;
int aspecth = coreh / gcd;
switch (screenMode) {
case SM_PA_TOP:
@ -347,13 +357,16 @@ static void _drawTex(struct mCore* core, bool faded) {
h = coreh;
break;
case SM_AF_TOP:
w = 360;
h = 240;
break;
case SM_AF_BOTTOM:
// Largest possible size with 3:2 aspect ratio and integer dimensions
w = 318;
h = 212;
w = screen_w / aspectw;
h = screen_h / aspecth;
if (w * aspecth > screen_h) {
w = aspectw * h;
h = aspecth * h;
} else {
h = aspecth * w;
w = aspectw * w;
}
break;
case SM_SF_TOP:
case SM_SF_BOTTOM: