1/* Copyright (c) 2013-2017 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 DS_VIDEO_H
  7#define DS_VIDEO_H
  8
  9#include <mgba-util/common.h>
 10
 11CXX_GUARD_START
 12
 13#include <mgba/core/log.h>
 14#include <mgba/core/timing.h>
 15#include <mgba/internal/gba/video.h>
 16
 17mLOG_DECLARE_CATEGORY(DS_VIDEO);
 18
 19enum {
 20	DS_VIDEO_HORIZONTAL_PIXELS = 256,
 21	DS_VIDEO_HBLANK_PIXELS = 99,
 22	DS7_VIDEO_HBLANK_LENGTH = 1613,
 23	DS9_VIDEO_HBLANK_LENGTH = 1606,
 24	DS_VIDEO_HORIZONTAL_LENGTH = (DS_VIDEO_HORIZONTAL_PIXELS + DS_VIDEO_HBLANK_PIXELS) * 6,
 25
 26	DS_VIDEO_VERTICAL_PIXELS = 192,
 27	DS_VIDEO_VBLANK_PIXELS = 71,
 28	DS_VIDEO_VERTICAL_TOTAL_PIXELS = DS_VIDEO_VERTICAL_PIXELS + DS_VIDEO_VBLANK_PIXELS,
 29
 30	DS_VIDEO_TOTAL_LENGTH = DS_VIDEO_HORIZONTAL_LENGTH * DS_VIDEO_VERTICAL_TOTAL_PIXELS,
 31};
 32
 33union DSOAM {
 34	union GBAOAM oam[2];
 35	uint16_t raw[1024];
 36};
 37
 38DECL_BITFIELD(DSRegisterDISPCNT, uint32_t);
 39DECL_BITS(DSRegisterDISPCNT, Mode, 0, 3);
 40DECL_BIT(DSRegisterDISPCNT, 3D, 3);
 41DECL_BIT(DSRegisterDISPCNT, TileObjMapping, 4);
 42DECL_BIT(DSRegisterDISPCNT, BitmapObj2D, 5);
 43DECL_BIT(DSRegisterDISPCNT, BitmapObjMapping, 6);
 44DECL_BIT(DSRegisterDISPCNT, ForcedBlank, 7);
 45DECL_BIT(DSRegisterDISPCNT, Bg0Enable, 8);
 46DECL_BIT(DSRegisterDISPCNT, Bg1Enable, 9);
 47DECL_BIT(DSRegisterDISPCNT, Bg2Enable, 10);
 48DECL_BIT(DSRegisterDISPCNT, Bg3Enable, 11);
 49DECL_BIT(DSRegisterDISPCNT, ObjEnable, 12);
 50DECL_BIT(DSRegisterDISPCNT, Win0Enable, 13);
 51DECL_BIT(DSRegisterDISPCNT, Win1Enable, 14);
 52DECL_BIT(DSRegisterDISPCNT, ObjwinEnable, 15);
 53DECL_BITS(DSRegisterDISPCNT, DispMode, 16, 2);
 54DECL_BITS(DSRegisterDISPCNT, VRAMBlock, 18, 2);
 55DECL_BITS(DSRegisterDISPCNT, TileBoundary, 20, 2);
 56// TODO
 57DECL_BITS(DSRegisterDISPCNT, CharBase, 24, 3);
 58DECL_BITS(DSRegisterDISPCNT, ScreenBase, 27, 3);
 59// TODO
 60
 61DECL_BITFIELD(DSRegisterPOWCNT1, uint16_t);
 62// TODO
 63DECL_BIT(DSRegisterPOWCNT1, Swap, 15);
 64
 65struct DSVideoRenderer {
 66	void (*init)(struct DSVideoRenderer* renderer);
 67	void (*reset)(struct DSVideoRenderer* renderer);
 68	void (*deinit)(struct DSVideoRenderer* renderer);
 69
 70	uint16_t (*writeVideoRegister)(struct DSVideoRenderer* renderer, uint32_t address, uint16_t value);
 71	void (*writePalette)(struct DSVideoRenderer* renderer, uint32_t address, uint16_t value);
 72	void (*writeOAM)(struct DSVideoRenderer* renderer, uint32_t oam);
 73	void (*drawScanline)(struct DSVideoRenderer* renderer, int y);
 74	void (*finishFrame)(struct DSVideoRenderer* renderer);
 75
 76	void (*getPixels)(struct DSVideoRenderer* renderer, size_t* stride, const void** pixels);
 77	void (*putPixels)(struct DSVideoRenderer* renderer, size_t stride, const void* pixels);
 78
 79	uint16_t* palette;
 80	uint16_t* vram;
 81	uint16_t* vramABG[32];
 82	uint16_t* vramAOBJ[32];
 83	uint16_t* vramBBG[32];
 84	uint16_t* vramBOBJ[32];
 85	union DSOAM* oam;
 86};
 87
 88struct DS;
 89struct DSVideo {
 90	struct DS* p;
 91	struct DSVideoRenderer* renderer;
 92	struct mTimingEvent event7;
 93	struct mTimingEvent event9;
 94
 95	// VCOUNT
 96	int vcount;
 97
 98	uint16_t palette[1024];
 99	uint16_t* vram;
100	uint16_t* vramABG[32];
101	uint16_t* vramAOBJ[32];
102	uint16_t* vramBBG[32];
103	uint16_t* vramBOBJ[32];
104	union DSOAM oam;
105
106	int32_t frameCounter;
107	int frameskip;
108	int frameskipCounter;
109};
110
111void DSVideoInit(struct DSVideo* video);
112void DSVideoReset(struct DSVideo* video);
113void DSVideoDeinit(struct DSVideo* video);
114void DSVideoAssociateRenderer(struct DSVideo* video, struct DSVideoRenderer* renderer);
115
116struct DSCommon;
117void DSVideoWriteDISPSTAT(struct DSCommon* dscore, uint16_t value);
118
119struct DSMemory;
120void DSVideoConfigureVRAM(struct DS* ds, int index, uint8_t value);
121
122CXX_GUARD_START
123
124#endif