1/* Copyright (c) 2013-2015 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#ifndef VIDEO_SOFTWARE_H
  7#define VIDEO_SOFTWARE_H
  8
  9#include <mgba-util/common.h>
 10
 11CXX_GUARD_START
 12
 13#include <mgba/core/core.h>
 14#include <mgba/gba/interface.h>
 15#include <mgba/internal/gba/io.h>
 16#include <mgba/internal/gba/renderers/common.h>
 17#include <mgba/internal/gba/video.h>
 18
 19struct GBAVideoSoftwareBackground {
 20	unsigned index;
 21	int enabled;
 22	unsigned priority;
 23	uint32_t charBase;
 24	uint16_t control;
 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	int yCache;
 43	uint16_t mapCache[64];
 44	color_t* extPalette;
 45	color_t* variantPalette;
 46	int32_t offsetX;
 47	int32_t offsetY;
 48};
 49
 50enum {
 51#ifdef COLOR_16_BIT
 52#ifdef COLOR_5_6_5
 53	GBA_COLOR_WHITE = 0xFFDF,
 54#else
 55	GBA_COLOR_WHITE = 0x7FFF,
 56#endif
 57#else
 58	GBA_COLOR_WHITE = 0x00F8F8F8,
 59#endif
 60	OFFSET_PRIORITY = 30,
 61	OFFSET_INDEX = 28,
 62};
 63
 64#define FLAG_PRIORITY       0xC0000000
 65#define FLAG_INDEX          0x30000000
 66#define FLAG_IS_BACKGROUND  0x08000000
 67#define FLAG_UNWRITTEN      0xFC000000
 68#define FLAG_REBLEND        0x04000000
 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	int end;
 78	int start;
 79};
 80
 81struct WindowControl {
 82	GBAWindowControl packed;
 83	int8_t priority;
 84};
 85
 86#define MAX_WINDOW 5
 87
 88struct Window {
 89	uint16_t endX;
 90	struct WindowControl control;
 91};
 92
 93struct GBAVideoSoftwareRenderer {
 94	struct GBAVideoRenderer d;
 95
 96	color_t* outputBuffer;
 97	int outputBufferStride;
 98
 99	uint32_t* temporaryBuffer;
100
101	uint32_t dispcnt;
102
103	uint32_t row[256];
104	uint32_t spriteLayer[256];
105	uint8_t alphaA[256];
106	uint8_t alphaB[256];
107	int32_t spriteCyclesRemaining;
108
109	// BLDCNT
110	unsigned target1Obj;
111	unsigned target1Bd;
112	unsigned target2Obj;
113	unsigned target2Bd;
114	bool blendDirty;
115	enum GBAVideoBlendEffect blendEffect;
116	color_t normalPalette[512];
117	color_t variantPalette[512];
118	color_t* objExtPalette;
119	color_t* objExtVariantPalette;
120
121	uint16_t blda;
122	uint16_t bldb;
123	uint16_t bldy;
124
125	GBAMosaicControl mosaic;
126
127	struct WindowN {
128		struct GBAVideoWindowRegion h;
129		struct GBAVideoWindowRegion v;
130		struct WindowControl control;
131	} winN[2];
132
133	struct WindowControl winout;
134	struct WindowControl objwin;
135
136	struct WindowControl currentWindow;
137
138	int nWindows;
139	struct Window windows[MAX_WINDOW];
140
141	struct GBAVideoSoftwareBackground bg[4];
142
143	int oamDirty;
144	int oamMax;
145	struct GBAVideoRendererSprite sprites[128];
146	int tileStride;
147	int bitmapStride;
148	bool combinedObjSort;
149	int16_t objOffsetX;
150	int16_t objOffsetY;
151
152	uint32_t scanlineDirty[5];
153	uint16_t nextIo[REG_SOUND1CNT_LO];
154	struct ScanlineCache {
155		uint16_t io[REG_SOUND1CNT_LO];
156		int32_t scale[2][2];
157	} cache[GBA_VIDEO_VERTICAL_PIXELS];
158	int nextY;
159
160	int start;
161	int end;
162	int masterEnd;
163	int masterHeight;
164	int masterScanlines;
165
166	int masterBright;
167	int masterBrightY;
168};
169
170void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer);
171
172CXX_GUARD_START
173
174#endif