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Transformed sprites

This commit is contained in:
Jeffrey Pfau 2013-04-26 01:06:41 -07:00
parent f91149e30f
commit c61812325c
2 changed files with 48 additions and 2 deletions
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2
src/gba/gba-video.h
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@ -89,7 +89,7 @@ union GBAOAM {
int : 16;
} tobj[128];
struct {
struct GBAOAMMatrix {
int : 16;
int : 16;
int : 16;

48
src/gba/renderers/video-software.c
View File

@ -206,7 +206,7 @@ static void GBAVideoSoftwareRendererDrawScanline(struct GBAVideoRenderer* render
for (int i = 0; i < 128; ++i) {
struct GBAObj* sprite = &renderer->oam->obj[i];
if (sprite->transformed) {
// TODO
_drawTransformedSprite(softwareRenderer, &renderer->oam->tobj[i], y);
} else if (!sprite->disable) {
_drawSprite(softwareRenderer, sprite, y);
}
@ -449,6 +449,52 @@ static void _drawSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj
}
}
static void _drawTransformedSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBATransformedObj* sprite, int y) {
int width = _objSizes[sprite->shape * 8 + sprite->size * 2];
int totalWidth = width << sprite->doublesize;
int height = _objSizes[sprite->shape * 8 + sprite->size * 2 + 1];
int totalHeight = height << sprite->doublesize;
if ((y < sprite->y && (sprite->y + totalHeight - 256 < 0 || y >= sprite->y + totalHeight - 256)) || y >= sprite->y + totalHeight) {
return;
}
(void)(renderer);
struct PixelFlags flags = {
.priority = sprite->priority,
.isSprite = 1,
.target1 = renderer->target1Obj || sprite->mode == OBJ_MODE_SEMITRANSPARENT,
.target2 = renderer->target2Obj
};
int x = sprite->x;
unsigned charBase = BASE_TILE + sprite->tile * 0x20;
struct GBAOAMMatrix* mat = &renderer->d.oam->mat[sprite->matIndex];
for (int outX = x >= 0 ? x : 0; outX < x + totalWidth && outX < VIDEO_HORIZONTAL_PIXELS; ++outX) {
if (renderer->flags[outX].isSprite) {
continue;
}
int inY = y - sprite->y;
int inX = outX - x;
int localX = ((mat->a * (inX - (totalWidth >> 1)) + mat->b * (inY - (totalHeight >> 1))) >> 8) + (width >> 1);
int localY = ((mat->c * (inX - (totalWidth >> 1)) + mat->d * (inY - (totalHeight >> 1))) >> 8) + (height >> 1);
if (localX < 0 || localX >= width || localY < 0 || localY >= height) {
continue;
}
unsigned yBase = (localY & ~0x7) * 0x80 + (localY & 0x7) * 4;
unsigned xBase = (localX & ~0x7) * 4 + ((localX >> 1) & 2);
uint16_t tileData = renderer->d.vram[(yBase + charBase + xBase) >> 1];
tileData = (tileData >> ((localX & 3) << 2)) & 0xF;
if (tileData) {
if (!renderer->target1Obj) {
renderer->row[outX] = renderer->d.palette[0x100 | tileData | (sprite->palette << 4)];
} else {
renderer->row[outX] = renderer->variantPalette[0x100 | tileData | (sprite->palette << 4)];
}
renderer->flags[outX] = flags;
}
}
}
static void _updatePalettes(struct GBAVideoSoftwareRenderer* renderer) {
if (renderer->blendEffect == BLEND_BRIGHTEN) {
for (int i = 0; i < 512; ++i) {