1#ifndef VIDEO_SOFTWARE_H
  2#define VIDEO_SOFTWARE_H
  3
  4#include "common.h"
  5
  6#include "gba-video.h"
  7
  8#ifdef COLOR_16_BIT
  9typedef uint16_t color_t;
 10#else
 11typedef uint32_t color_t;
 12#endif
 13
 14struct GBAVideoSoftwareSprite {
 15	struct GBAObj obj;
 16	int y;
 17	int endY;
 18};
 19
 20struct GBAVideoSoftwareBackground {
 21	int index;
 22	int enabled;
 23	int priority;
 24	uint32_t charBase;
 25	int mosaic;
 26	int multipalette;
 27	uint32_t screenBase;
 28	int overflow;
 29	int size;
 30	int target1;
 31	int target2;
 32	uint16_t x;
 33	uint16_t y;
 34	int32_t refx;
 35	int32_t refy;
 36	int16_t dx;
 37	int16_t dmx;
 38	int16_t dy;
 39	int16_t dmy;
 40	int32_t sx;
 41	int32_t sy;
 42};
 43
 44enum BlendEffect {
 45	BLEND_NONE = 0,
 46	BLEND_ALPHA = 1,
 47	BLEND_BRIGHTEN = 2,
 48	BLEND_DARKEN = 3
 49};
 50
 51enum {
 52#ifdef COLOR_16_BIT
 53#ifdef COLOR_5_6_5
 54	GBA_COLOR_WHITE = 0xFFDF,
 55#else
 56	GBA_COLOR_WHITE = 0x7FFF,
 57#endif
 58#else
 59	GBA_COLOR_WHITE = 0x00F8F8F8,
 60#endif
 61	OFFSET_PRIORITY = 30,
 62	OFFSET_INDEX = 28,
 63};
 64
 65#define FLAG_PRIORITY       0xC0000000
 66#define FLAG_INDEX          0x30000000
 67#define FLAG_IS_BACKGROUND  0x08000000
 68#define FLAG_UNWRITTEN      0xFC000000
 69#define FLAG_TARGET_1       0x02000000
 70#define FLAG_TARGET_2       0x01000000
 71#define FLAG_OBJWIN         0x01000000
 72#define FLAG_ORDER_MASK     0xF8000000
 73
 74#define IS_WRITABLE(PIXEL) ((PIXEL) & 0xFE000000)
 75
 76struct WindowRegion {
 77	uint8_t end;
 78	uint8_t start;
 79};
 80
 81DECL_BITFIELD(GBAWindowControl, uint8_t);
 82DECL_BIT(GBAWindowControl, Bg0Enable, 0);
 83DECL_BIT(GBAWindowControl, Bg1Enable, 1);
 84DECL_BIT(GBAWindowControl, Bg2Enable, 2);
 85DECL_BIT(GBAWindowControl, Bg3Enable, 3);
 86DECL_BIT(GBAWindowControl, ObjEnable, 4);
 87DECL_BIT(GBAWindowControl, BlendEnable, 5);
 88
 89struct WindowControl {
 90	GBAWindowControl packed;
 91	int8_t priority;
 92};
 93
 94#define MAX_WINDOW 5
 95
 96struct Window {
 97	uint8_t endX;
 98	struct WindowControl control;
 99};
100
101struct GBAVideoSoftwareRenderer {
102	struct GBAVideoRenderer d;
103
104	color_t* outputBuffer;
105	unsigned outputBufferStride;
106
107	GBARegisterDISPCNT dispcnt;
108
109	uint32_t row[VIDEO_HORIZONTAL_PIXELS];
110	uint32_t spriteLayer[VIDEO_HORIZONTAL_PIXELS];
111
112	// BLDCNT
113	unsigned target1Obj;
114	unsigned target1Bd;
115	unsigned target2Obj;
116	unsigned target2Bd;
117	enum BlendEffect blendEffect;
118	color_t normalPalette[512];
119	color_t variantPalette[512];
120	int anyTarget2;
121
122	uint16_t blda;
123	uint16_t bldb;
124	uint16_t bldy;
125
126	union {
127		struct {
128			unsigned bgH : 4;
129			unsigned bgV : 4;
130			unsigned objH : 4;
131			unsigned objV : 4;
132		};
133		uint16_t packed;
134	} mosaic;
135
136	struct WindowN {
137		struct WindowRegion h;
138		struct WindowRegion v;
139		struct WindowControl control;
140	} winN[2];
141
142	struct WindowControl winout;
143	struct WindowControl objwin;
144
145	struct WindowControl currentWindow;
146
147	int nWindows;
148	struct Window windows[MAX_WINDOW];
149
150	struct GBAVideoSoftwareBackground bg[4];
151
152	int oamDirty;
153	int oamMax;
154	struct GBAVideoSoftwareSprite sprites[128];
155
156	int start;
157	int end;
158};
159
160void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer);
161
162#endif