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	bool highlight;
 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_REBLEND        0x04000000
 70#define FLAG_TARGET_1       0x02000000
 71#define FLAG_TARGET_2       0x01000000
 72#define FLAG_OBJWIN         0x01000000
 73#define FLAG_ORDER_MASK     0xF8000000
 74
 75#define IS_WRITABLE(PIXEL) ((PIXEL) & 0xFE000000)
 76
 77struct WindowRegion {
 78	int end;
 79	int start;
 80};
 81
 82struct WindowControl {
 83	GBAWindowControl packed;
 84	int8_t priority;
 85};
 86
 87#define MAX_WINDOW 5
 88
 89struct Window {
 90	uint16_t endX;
 91	struct WindowControl control;
 92};
 93
 94struct GBAVideoSoftwareRenderer {
 95	struct GBAVideoRenderer d;
 96
 97	color_t* outputBuffer;
 98	int outputBufferStride;
 99
100	uint32_t* temporaryBuffer;
101
102	uint32_t dispcnt;
103
104	uint32_t row[256];
105	uint32_t spriteLayer[256];
106	uint8_t alphaA[256];
107	uint8_t alphaB[256];
108	int32_t spriteCyclesRemaining;
109
110	// BLDCNT
111	unsigned target1Obj;
112	unsigned target1Bd;
113	unsigned target2Obj;
114	unsigned target2Bd;
115	bool blendDirty;
116	enum GBAVideoBlendEffect blendEffect;
117	color_t normalPalette[512];
118	color_t variantPalette[512];
119	color_t* objExtPalette;
120	color_t* objExtVariantPalette;
121	color_t highlightPalette[512];
122	color_t highlightVariantPalette[512];
123
124	uint16_t blda;
125	uint16_t bldb;
126	uint16_t bldy;
127
128	GBAMosaicControl mosaic;
129
130	struct WindowN {
131		struct GBAVideoWindowRegion h;
132		struct GBAVideoWindowRegion v;
133		struct WindowControl control;
134	} winN[2];
135
136	struct WindowControl winout;
137	struct WindowControl objwin;
138
139	struct WindowControl currentWindow;
140
141	int nWindows;
142	struct Window windows[MAX_WINDOW];
143
144	struct GBAVideoSoftwareBackground bg[4];
145
146	bool forceTarget1;
147	bool oamDirty;
148	int oamMax;
149	struct GBAVideoRendererSprite sprites[128];
150	int tileStride;
151	int bitmapStride;
152	bool combinedObjSort;
153	int16_t objOffsetX;
154	int16_t objOffsetY;
155
156	uint32_t scanlineDirty[5];
157	uint16_t nextIo[REG_SOUND1CNT_LO];
158	struct ScanlineCache {
159		uint16_t io[REG_SOUND1CNT_LO];
160		int32_t scale[2][2];
161	} cache[GBA_VIDEO_VERTICAL_PIXELS];
162	int nextY;
163
164	int start;
165	int end;
166	int masterEnd;
167	int masterHeight;
168	int masterScanlines;
169
170	int masterBright;
171	int masterBrightY;
172
173	uint8_t lastHighlightAmount;
174};
175
176void GBAVideoSoftwareRendererCreate(struct GBAVideoSoftwareRenderer* renderer);
177
178CXX_GUARD_START
179
180#endif