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Redo compositing and sprite blending

This commit is contained in:
Jeffrey Pfau 2013-04-27 01:36:06 -07:00
parent b3e1aa7853
commit 2bc23e7aa2
2 changed files with 20 additions and 23 deletions
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42
src/gba/renderers/video-software.c
View File

@ -296,31 +296,29 @@ static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer*
}
static void _composite(struct GBAVideoSoftwareRenderer* renderer, int offset, uint16_t color, struct PixelFlags flags) {
if (renderer->flags[offset].isSprite && flags.priority >= renderer->flags[offset].priority) {
if (renderer->flags[offset].target1) {
if (flags.target2) {
renderer->row[offset] = _mix(renderer->bldb, color, renderer->blda, renderer->row[offset]);
struct PixelFlags currentFlags = renderer->flags[offset];
if (currentFlags.isSprite && flags.priority >= currentFlags.priority) {
if (currentFlags.target1) {
if (currentFlags.written && currentFlags.target2) {
renderer->row[offset] = _mix(renderer->blda, renderer->row[offset], renderer->bldb, renderer->spriteLayer[offset]);
} else if (flags.target2) {
renderer->row[offset] = _mix(renderer->bldb, color, renderer->blda, renderer->spriteLayer[offset]);
}
} else if (!currentFlags.written) {
renderer->row[offset] = renderer->spriteLayer[offset];
}
renderer->flags[offset].finalized = 1;
renderer->flags[offset].written = 1;
return;
}
if (renderer->blendEffect == BLEND_NONE || (!flags.target1 && !flags.target2)) {
renderer->row[offset] = color;
renderer->flags[offset].finalized = 1;
} else if (renderer->blendEffect == BLEND_BRIGHTEN || renderer->blendEffect == BLEND_DARKEN) {
if (renderer->blendEffect != BLEND_ALPHA || (!flags.target1 && !flags.target2)) {
renderer->row[offset] = color;
renderer->flags[offset].finalized = 1;
} else if (renderer->blendEffect == BLEND_ALPHA) {
if (renderer->flags[offset].written) {
if (renderer->flags[offset].target1 && flags.target2) {
if (currentFlags.written) {
if (currentFlags.target1 && flags.target2) {
renderer->row[offset] = _mix(renderer->bldb, color, renderer->blda, renderer->row[offset]);
}
renderer->flags[offset].finalized = 1;
} else if (renderer->flags[offset].isSprite && renderer->flags[offset].target2 && flags.target1) {
renderer->row[offset] = _mix(renderer->blda, color, renderer->bldb, renderer->row[offset]);
renderer->flags[offset].finalized = 1;
} else {
renderer->row[offset] = color;
renderer->flags[offset].target1 = flags.target1;
@ -412,7 +410,7 @@ static void _drawBackgroundMode0(struct GBAVideoSoftwareRenderer* renderer, stru
uint32_t screenBase;
uint32_t charBase;
struct PixelFlags flags = {
.target1 = background->target1,
.target1 = background->target1 && renderer->blendEffect == BLEND_ALPHA,
.target2 = background->target2,
.priority = background->priority
};
@ -457,11 +455,10 @@ static void _drawSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj
if ((y < sprite->y && (sprite->y + height - 256 < 0 || y >= sprite->y + height - 256)) || y >= sprite->y + height) {
return;
}
(void)(renderer);
struct PixelFlags flags = {
.priority = sprite->priority,
.isSprite = 1,
.target1 = renderer->target1Obj || sprite->mode == OBJ_MODE_SEMITRANSPARENT,
.target1 = (renderer->target1Obj && renderer->blendEffect == BLEND_ALPHA) || sprite->mode == OBJ_MODE_SEMITRANSPARENT,
.target2 = renderer->target2Obj
};
int x = sprite->x;
@ -487,9 +484,9 @@ static void _drawSprite(struct GBAVideoSoftwareRenderer* renderer, struct GBAObj
tileData = (tileData >> ((inX & 3) << 2)) & 0xF;
if (tileData) {
if (!renderer->target1Obj) {
renderer->row[outX] = renderer->d.palette[0x100 | tileData | (sprite->palette << 4)];
renderer->spriteLayer[outX] = renderer->d.palette[0x100 | tileData | (sprite->palette << 4)];
} else {
renderer->row[outX] = renderer->variantPalette[0x100 | tileData | (sprite->palette << 4)];
renderer->spriteLayer[outX] = renderer->variantPalette[0x100 | tileData | (sprite->palette << 4)];
}
renderer->flags[outX] = flags;
}
@ -504,11 +501,10 @@ static void _drawTransformedSprite(struct GBAVideoSoftwareRenderer* renderer, st
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,
.target1 = (renderer->target1Obj && renderer->blendEffect == BLEND_ALPHA) || sprite->mode == OBJ_MODE_SEMITRANSPARENT,
.target2 = renderer->target2Obj
};
int x = sprite->x;
@ -533,9 +529,9 @@ static void _drawTransformedSprite(struct GBAVideoSoftwareRenderer* renderer, st
tileData = (tileData >> ((localX & 3) << 2)) & 0xF;
if (tileData) {
if (!renderer->target1Obj) {
renderer->row[outX] = renderer->d.palette[0x100 | tileData | (sprite->palette << 4)];
renderer->spriteLayer[outX] = renderer->d.palette[0x100 | tileData | (sprite->palette << 4)];
} else {
renderer->row[outX] = renderer->variantPalette[0x100 | tileData | (sprite->palette << 4)];
renderer->spriteLayer[outX] = renderer->variantPalette[0x100 | tileData | (sprite->palette << 4)];
}
renderer->flags[outX] = flags;
}

1
src/gba/renderers/video-software.h
View File

@ -53,6 +53,7 @@ struct GBAVideoSoftwareRenderer {
union GBARegisterDISPCNT dispcnt;
uint16_t spriteLayer[VIDEO_HORIZONTAL_PIXELS];
struct PixelFlags flags[VIDEO_HORIZONTAL_PIXELS];
// BLDCNT