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Use bitfields for BLDCNT

This commit is contained in:
Jeffrey Pfau 2014-10-05 22:36:25 -07:00
parent fd5b95024e
commit 8ef31b1c3d
1 changed files with 29 additions and 33 deletions
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62
src/gba/renderers/video-software.c
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@ -22,6 +22,21 @@ static const int _objSizes[32] = {
0, 0
};
DECL_BITFIELD(GBARegisterBLDCNT, uint16_t);
DECL_BIT(GBARegisterBLDCNT, Target1Bg0, 0);
DECL_BIT(GBARegisterBLDCNT, Target1Bg1, 1);
DECL_BIT(GBARegisterBLDCNT, Target1Bg2, 2);
DECL_BIT(GBARegisterBLDCNT, Target1Bg3, 3);
DECL_BIT(GBARegisterBLDCNT, Target1Obj, 4);
DECL_BIT(GBARegisterBLDCNT, Target1Bd, 5);
DECL_BITS(GBARegisterBLDCNT, Effect, 6, 2);
DECL_BIT(GBARegisterBLDCNT, Target2Bg0, 8);
DECL_BIT(GBARegisterBLDCNT, Target2Bg1, 9);
DECL_BIT(GBARegisterBLDCNT, Target2Bg2, 10);
DECL_BIT(GBARegisterBLDCNT, Target2Bg3, 11);
DECL_BIT(GBARegisterBLDCNT, Target2Obj, 12);
DECL_BIT(GBARegisterBLDCNT, Target2Bd, 13);
static void GBAVideoSoftwareRendererInit(struct GBAVideoRenderer* renderer);
static void GBAVideoSoftwareRendererDeinit(struct GBAVideoRenderer* renderer);
static void GBAVideoSoftwareRendererWriteOAM(struct GBAVideoRenderer* renderer, uint32_t oam);
@ -584,43 +599,24 @@ static void GBAVideoSoftwareRendererWriteBGY_HI(struct GBAVideoSoftwareBackgroun
}
static void GBAVideoSoftwareRendererWriteBLDCNT(struct GBAVideoSoftwareRenderer* renderer, uint16_t value) {
union {
struct {
unsigned target1Bg0 : 1;
unsigned target1Bg1 : 1;
unsigned target1Bg2 : 1;
unsigned target1Bg3 : 1;
unsigned target1Obj : 1;
unsigned target1Bd : 1;
enum BlendEffect effect : 2;
unsigned target2Bg0 : 1;
unsigned target2Bg1 : 1;
unsigned target2Bg2 : 1;
unsigned target2Bg3 : 1;
unsigned target2Obj : 1;
unsigned target2Bd : 1;
};
uint16_t packed;
} bldcnt = { .packed = value };
enum BlendEffect oldEffect = renderer->blendEffect;
renderer->bg[0].target1 = bldcnt.target1Bg0;
renderer->bg[1].target1 = bldcnt.target1Bg1;
renderer->bg[2].target1 = bldcnt.target1Bg2;
renderer->bg[3].target1 = bldcnt.target1Bg3;
renderer->bg[0].target2 = bldcnt.target2Bg0;
renderer->bg[1].target2 = bldcnt.target2Bg1;
renderer->bg[2].target2 = bldcnt.target2Bg2;
renderer->bg[3].target2 = bldcnt.target2Bg3;
renderer->bg[0].target1 = GBARegisterBLDCNTGetTarget1Bg0(value);
renderer->bg[1].target1 = GBARegisterBLDCNTGetTarget1Bg1(value);
renderer->bg[2].target1 = GBARegisterBLDCNTGetTarget1Bg2(value);
renderer->bg[3].target1 = GBARegisterBLDCNTGetTarget1Bg3(value);
renderer->bg[0].target2 = GBARegisterBLDCNTGetTarget2Bg0(value);
renderer->bg[1].target2 = GBARegisterBLDCNTGetTarget2Bg1(value);
renderer->bg[2].target2 = GBARegisterBLDCNTGetTarget2Bg2(value);
renderer->bg[3].target2 = GBARegisterBLDCNTGetTarget2Bg3(value);
renderer->blendEffect = bldcnt.effect;
renderer->target1Obj = bldcnt.target1Obj;
renderer->target1Bd = bldcnt.target1Bd;
renderer->target2Obj = bldcnt.target2Obj;
renderer->target2Bd = bldcnt.target2Bd;
renderer->blendEffect = GBARegisterBLDCNTGetEffect(value);
renderer->target1Obj = GBARegisterBLDCNTGetTarget1Obj(value);
renderer->target1Bd = GBARegisterBLDCNTGetTarget1Bd(value);
renderer->target2Obj = GBARegisterBLDCNTGetTarget2Obj(value);
renderer->target2Bd = GBARegisterBLDCNTGetTarget2Bd(value);
renderer->anyTarget2 = bldcnt.packed & 0x3F00;
renderer->anyTarget2 = value & 0x3F00;
if (oldEffect != renderer->blendEffect) {
_updatePalettes(renderer);