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	union {
 16		struct GBAObj obj;
 17		struct GBATransformedObj tobj;
 18	};
 19	int y;
 20	int endY;
 21};
 22
 23struct GBAVideoSoftwareBackground {
 24	int index;
 25	int enabled;
 26	int priority;
 27	uint32_t charBase;
 28	int mosaic;
 29	int multipalette;
 30	uint32_t screenBase;
 31	int overflow;
 32	int size;
 33	int target1;
 34	int target2;
 35	uint16_t x;
 36	uint16_t y;
 37	int32_t refx;
 38	int32_t refy;
 39	int16_t dx;
 40	int16_t dmx;
 41	int16_t dy;
 42	int16_t dmy;
 43	int32_t sx;
 44	int32_t sy;
 45};
 46
 47enum BlendEffect {
 48	BLEND_NONE = 0,
 49	BLEND_ALPHA = 1,
 50	BLEND_BRIGHTEN = 2,
 51	BLEND_DARKEN = 3
 52};
 53
 54enum {
 55#ifdef COLOR_16_BIT
 56#ifdef COLOR_5_6_5
 57	GBA_COLOR_WHITE = 0xFFDF,
 58#else
 59	GBA_COLOR_WHITE = 0x7FFF,
 60#endif
 61#else
 62	GBA_COLOR_WHITE = 0x00F8F8F8,
 63#endif
 64	OFFSET_PRIORITY = 30,
 65	OFFSET_INDEX = 28,
 66};
 67
 68#define FLAG_PRIORITY       0xC0000000
 69#define FLAG_INDEX          0x30000000
 70#define FLAG_IS_BACKGROUND  0x08000000
 71#define FLAG_UNWRITTEN      0xFC000000
 72#define FLAG_TARGET_1       0x02000000
 73#define FLAG_TARGET_2       0x01000000
 74#define FLAG_OBJWIN         0x01000000
 75#define FLAG_ORDER_MASK     0xF8000000
 76
 77#define IS_WRITABLE(PIXEL) ((PIXEL) & 0xFE000000)
 78
 79union WindowRegion {
 80	struct {
 81		uint8_t end;
 82		uint8_t start;
 83	};
 84	uint16_t packed;
 85};
 86
 87struct WindowControl {
 88	union {
 89		struct {
 90			unsigned bg0Enable : 1;
 91			unsigned bg1Enable : 1;
 92			unsigned bg2Enable : 1;
 93			unsigned bg3Enable : 1;
 94			unsigned objEnable : 1;
 95			unsigned blendEnable : 1;
 96			unsigned : 2;
 97		};
 98		uint8_t packed;
 99	};
100	int8_t priority;
101};
102
103#define MAX_WINDOW 5
104
105struct Window {
106	uint8_t endX;
107	struct WindowControl control;
108};
109
110struct GBAVideoSoftwareRenderer {
111	struct GBAVideoRenderer d;
112
113	color_t* outputBuffer;
114	unsigned outputBufferStride;
115
116	GBARegisterDISPCNT dispcnt;
117
118	uint32_t row[VIDEO_HORIZONTAL_PIXELS];
119	uint32_t spriteLayer[VIDEO_HORIZONTAL_PIXELS];
120
121	// BLDCNT
122	unsigned target1Obj;
123	unsigned target1Bd;
124	unsigned target2Obj;
125	unsigned target2Bd;
126	enum BlendEffect blendEffect;
127	color_t normalPalette[512];
128	color_t variantPalette[512];
129	int anyTarget2;
130
131	uint16_t blda;
132	uint16_t bldb;
133	uint16_t bldy;
134
135	union {
136		struct {
137			unsigned bgH : 4;
138			unsigned bgV : 4;
139			unsigned objH : 4;
140			unsigned objV : 4;
141		};
142		uint16_t packed;
143	} mosaic;
144
145	struct WindowN {
146		union WindowRegion h;
147		union WindowRegion v;
148		struct WindowControl control;
149	} winN[2];
150
151	struct WindowControl winout;
152	struct WindowControl objwin;
153
154	struct WindowControl currentWindow;
155
156	int nWindows;
157	struct Window windows[MAX_WINDOW];
158
159	struct GBAVideoSoftwareBackground bg[4];
160
161	int oamDirty;
162	int oamMax;
163	struct GBAVideoSoftwareSprite sprites[128];
164
165	int start;
166	int end;
167};
168
169void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer);
170
171#endif