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add support for camera X/Y flip

This commit is contained in:
Arisotura 2022-09-26 19:32:50 +02:00
parent 5f365afb9c
commit b58e944351
1 changed files with 5 additions and 56 deletions
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61
src/DSi_Camera.cpp
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@ -437,21 +437,6 @@ void Camera::Reset()
TransferY = 0;
memset(FrameBuffer, 0, (640*480/2)*sizeof(u32));
// test pattern
/*for (int y = 0; y < 480; y++)
{
for (int x = 0; x < 640; x++)
{
u32 color = Num ? 0x00FF0000 : 0x000000FF;
//if ((x & 0x10) ^ (y & 0x10))
if (((x%20)>=10) ^ ((y%20)>=10))
color |= 0x0000FF00;
else color |= (y & 0xFF) << (Num ? 0 : 16);
FrameBuffer[y*640 + x] = color;
}
}*/
}
bool Camera::IsActivated()
@ -517,53 +502,17 @@ int Camera::TransferScanline(u32* buffer, int maxlen)
int retlen = FrameWidth >> 1;
int sy = (TransferY * 480) / FrameHeight;
if (FrameReadMode & (1<<1))
sy = 479 - sy;
for (int dx = 0; dx < retlen; dx++)
{
if (dx >= maxlen) break;
// convert to YUV
// Y = 0.299R + 0.587G + 0.114B
// U = 0.492 (B-Y)
// V = 0.877 (R-Y)
int sx = (dx * 640) / FrameWidth;
if (!(FrameReadMode & (1<<0)))
sx = 639 - sx;
int sx;
/*sx = ((dx*2) * 640) / FrameWidth;
u32 pixel1 = FrameBuffer[sy*640 + sx];
sx = ((dx*2 + 1) * 640) / FrameWidth;
u32 pixel2 = FrameBuffer[sy*640 + sx];
int r1 = (pixel1 >> 16) & 0xFF;
int g1 = (pixel1 >> 8) & 0xFF;
int b1 = pixel1 & 0xFF;
int r2 = (pixel2 >> 16) & 0xFF;
int g2 = (pixel2 >> 8) & 0xFF;
int b2 = pixel2 & 0xFF;
int y1 = ((r1 * 19595) + (g1 * 38470) + (b1 * 7471)) >> 16;
int u1 = ((b1 - y1) * 32244) >> 16;
int v1 = ((r1 - y1) * 57475) >> 16;
int y2 = ((r2 * 19595) + (g2 * 38470) + (b2 * 7471)) >> 16;
int u2 = ((b2 - y2) * 32244) >> 16;
int v2 = ((r2 - y2) * 57475) >> 16;
u1 += 128; v1 += 128;
u2 += 128; v2 += 128;
y1 = std::clamp(y1, 0, 255); u1 = std::clamp(u1, 0, 255); v1 = std::clamp(v1, 0, 255);
y2 = std::clamp(y2, 0, 255); u2 = std::clamp(u2, 0, 255); v2 = std::clamp(v2, 0, 255);
// huh
u1 = (u1 + u2) >> 1;
v1 = (v1 + v2) >> 1;
buffer[dx] = y1 | (u1 << 8) | (y2 << 16) | (v1 << 24);*/
sx = ((dx) * 640) / FrameWidth;
u32 pixel3 = FrameBuffer[sy*320 + sx];
buffer[dx] = pixel3;
}