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GBA Video: Fix window start on modes 2-5 with mosaic (fixes #1690)

This commit is contained in:
Vicki Pfau 2021-03-31 23:06:16 -07:00
parent 9be79ddb64
commit 7744332b64
2 changed files with 36 additions and 11 deletions
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1
CHANGES
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@ -3,6 +3,7 @@ Emulation fixes:
- Core: Fix first event scheduling after loading savestate
- GB Serialize: Fix switching speed modes when loading a state (fixes mgba.io/i/2097)
- GBA Memory: Fix loading Thumb savestates when in ARM mode
- GBA Video: Fix window start on modes 3-5 with mosaic (fixes mgba.io/i/1690)
Other fixes:
- GBA: Fix non-USA 1.0 FireRed misdetecting as a ROM hack (fixes mgba.io/i/2100)
- GBA: Fix crash when ROM loading fails

46
src/gba/renderers/software-bg.c
View File

@ -13,15 +13,21 @@
int32_t y = background->sy + (renderer->start - 1) * background->dy; \
int mosaicH = 0; \
int mosaicWait = 0; \
if (background->mosaic) { \
int mosaicV = GBAMosaicControlGetBgV(renderer->mosaic) + 1; \
y -= (inY % mosaicV) * background->dmy; \
x -= (inY % mosaicV) * background->dmx; \
mosaicH = GBAMosaicControlGetBgH(renderer->mosaic); \
mosaicWait = renderer->start % (mosaicH + 1); \
} \
int32_t localX; \
int32_t localY; \
if (background->mosaic) { \
int mosaicV = GBAMosaicControlGetBgV(renderer->mosaic) + 1; \
mosaicH = GBAMosaicControlGetBgH(renderer->mosaic) + 1; \
mosaicWait = (mosaicH - renderer->start + GBA_VIDEO_HORIZONTAL_PIXELS * mosaicH) % mosaicH; \
int32_t startX = renderer->start - (renderer->start % mosaicH); \
--mosaicH; \
localX = -(inY % mosaicV) * background->dmx; \
localY = -(inY % mosaicV) * background->dmy; \
x += localX; \
y += localY; \
localX += background->sx + startX * background->dx; \
localY += background->sy + startX * background->dy; \
} \
\
uint32_t flags = (background->priority << OFFSET_PRIORITY) | (background->index << OFFSET_INDEX) | FLAG_IS_BACKGROUND; \
flags |= FLAG_TARGET_2 * background->target2; \
@ -55,10 +61,9 @@
\
if (x < 0 || y < 0 || (x >> 8) >= W || (y >> 8) >= H) { \
continue; \
} else { \
localX = x; \
localY = y; \
}
} \
localX = x; \
localY = y; \
#define MODE_2_COORD_OVERFLOW \
localX = x & (sizeAdjusted - 1); \
@ -102,12 +107,20 @@
#define DRAW_BACKGROUND_MODE_2(BLEND, OBJWIN) \
if (background->overflow) { \
if (mosaicH > 1) { \
localX &= sizeAdjusted - 1; \
localY &= sizeAdjusted - 1; \
MODE_2_NO_MOSAIC(); \
MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \
} else { \
MODE_2_LOOP(MODE_2_NO_MOSAIC, MODE_2_COORD_OVERFLOW, BLEND, OBJWIN); \
} \
} else { \
if (mosaicH > 1) { \
if (!((x | y) & ~(sizeAdjusted - 1))) { \
localX &= sizeAdjusted - 1; \
localY &= sizeAdjusted - 1; \
MODE_2_NO_MOSAIC(); \
} \
MODE_2_LOOP(MODE_2_MOSAIC, MODE_2_COORD_NO_OVERFLOW, BLEND, OBJWIN); \
} else { \
MODE_2_LOOP(MODE_2_NO_MOSAIC, MODE_2_COORD_NO_OVERFLOW, BLEND, OBJWIN); \
@ -146,6 +159,10 @@ void GBAVideoSoftwareRendererDrawBackgroundMode3(struct GBAVideoSoftwareRenderer
BACKGROUND_BITMAP_INIT;
uint32_t color = renderer->normalPalette[0];
if (mosaicWait && localX >= 0 && localY >= 0) {
LOAD_16(color, ((localX >> 8) + (localY >> 8) * GBA_VIDEO_HORIZONTAL_PIXELS) << 1, renderer->d.vram);
color = mColorFrom555(color);
}
int outX;
uint32_t* pixel;
@ -185,6 +202,9 @@ void GBAVideoSoftwareRendererDrawBackgroundMode4(struct GBAVideoSoftwareRenderer
if (GBARegisterDISPCNTIsFrameSelect(renderer->dispcnt)) {
offset = 0xA000;
}
if (mosaicWait && localX >= 0 && localY >= 0) {
color = ((uint8_t*)renderer->d.vram)[offset + (localX >> 8) + (localY >> 8) * GBA_VIDEO_HORIZONTAL_PIXELS];
}
int outX;
uint32_t* pixel;
@ -223,6 +243,10 @@ void GBAVideoSoftwareRendererDrawBackgroundMode5(struct GBAVideoSoftwareRenderer
if (GBARegisterDISPCNTIsFrameSelect(renderer->dispcnt)) {
offset = 0xA000;
}
if (mosaicWait && localX >= 0 && localY >= 0) {
LOAD_16(color, offset + (localX >> 8) * 2 + (localY >> 8) * 320, renderer->d.vram);
color = mColorFrom555(color);
}
int outX;
uint32_t* pixel;