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
16mLOG_DECLARE_CATEGORY(DS_VIDEO);
17
18enum {
19	DS_VIDEO_HORIZONTAL_PIXELS = 256,
20	DS_VIDEO_HBLANK_PIXELS = 99,
21	DS7_VIDEO_HBLANK_LENGTH = 1613,
22	DS9_VIDEO_HBLANK_LENGTH = 1606,
23	DS_VIDEO_HORIZONTAL_LENGTH = (DS_VIDEO_HORIZONTAL_PIXELS + DS_VIDEO_HBLANK_PIXELS) * 6,
24
25	DS_VIDEO_VERTICAL_PIXELS = 192,
26	DS_VIDEO_VBLANK_PIXELS = 71,
27	DS_VIDEO_VERTICAL_TOTAL_PIXELS = DS_VIDEO_VERTICAL_PIXELS + DS_VIDEO_VBLANK_PIXELS,
28
29	DS_VIDEO_TOTAL_LENGTH = DS_VIDEO_HORIZONTAL_LENGTH * DS_VIDEO_VERTICAL_TOTAL_PIXELS,
30};
31
32struct DSVideoRenderer {
33	void (*init)(struct DSVideoRenderer* renderer);
34	void (*reset)(struct DSVideoRenderer* renderer);
35	void (*deinit)(struct DSVideoRenderer* renderer);
36
37	uint16_t (*writeVideoRegister)(struct DSVideoRenderer* renderer, uint32_t address, uint16_t value);
38	void (*drawScanline)(struct DSVideoRenderer* renderer, int y);
39	void (*finishFrame)(struct DSVideoRenderer* renderer);
40
41	void (*getPixels)(struct DSVideoRenderer* renderer, size_t* stride, const void** pixels);
42	void (*putPixels)(struct DSVideoRenderer* renderer, size_t stride, const void* pixels);
43
44	uint16_t* vram;
45};
46
47struct DS;
48struct DSVideo {
49	struct DS* p;
50	struct DSVideoRenderer* renderer;
51	struct mTimingEvent event7;
52	struct mTimingEvent event9;
53
54	// VCOUNT
55	int vcount;
56
57	uint16_t* vram;
58
59	int32_t frameCounter;
60	int frameskip;
61	int frameskipCounter;
62};
63
64void DSVideoInit(struct DSVideo* video);
65void DSVideoReset(struct DSVideo* video);
66void DSVideoDeinit(struct DSVideo* video);
67void DSVideoAssociateRenderer(struct DSVideo* video, struct DSVideoRenderer* renderer);
68
69struct DSCommon;
70void DSVideoWriteDISPSTAT(struct DSCommon* dscore, uint16_t value);
71
72struct DSMemory;
73void DSVideoConfigureVRAM(struct DSMemory* memory, int index, uint8_t value);
74
75CXX_GUARD_START
76
77#endif