src/ds/renderers/software.c (view raw)
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#include <mgba/internal/ds/renderers/software.h>
7
8#include <mgba/internal/arm/macros.h>
9#include <mgba/internal/ds/io.h>
10
11static void DSVideoSoftwareRendererInit(struct DSVideoRenderer* renderer);
12static void DSVideoSoftwareRendererDeinit(struct DSVideoRenderer* renderer);
13static void DSVideoSoftwareRendererReset(struct DSVideoRenderer* renderer);
14static uint16_t DSVideoSoftwareRendererWriteVideoRegister(struct DSVideoRenderer* renderer, uint32_t address, uint16_t value);
15static void DSVideoSoftwareRendererWritePalette(struct DSVideoRenderer* renderer, uint32_t address, uint16_t value);
16static void DSVideoSoftwareRendererWriteOAM(struct DSVideoRenderer* renderer, uint32_t oam);
17static void DSVideoSoftwareRendererDrawScanline(struct DSVideoRenderer* renderer, int y);
18static void DSVideoSoftwareRendererFinishFrame(struct DSVideoRenderer* renderer);
19static void DSVideoSoftwareRendererGetPixels(struct DSVideoRenderer* renderer, size_t* stride, const void** pixels);
20static void DSVideoSoftwareRendererPutPixels(struct DSVideoRenderer* renderer, size_t stride, const void* pixels);
21
22void DSVideoSoftwareRendererCreate(struct DSVideoSoftwareRenderer* renderer) {
23 renderer->d.init = DSVideoSoftwareRendererInit;
24 renderer->d.reset = DSVideoSoftwareRendererReset;
25 renderer->d.deinit = DSVideoSoftwareRendererDeinit;
26 renderer->d.writeVideoRegister = DSVideoSoftwareRendererWriteVideoRegister;
27 renderer->d.writePalette = DSVideoSoftwareRendererWritePalette;
28 renderer->d.writeOAM = DSVideoSoftwareRendererWriteOAM;
29 renderer->d.drawScanline = DSVideoSoftwareRendererDrawScanline;
30 renderer->d.finishFrame = DSVideoSoftwareRendererFinishFrame;
31 renderer->d.getPixels = DSVideoSoftwareRendererGetPixels;
32 renderer->d.putPixels = DSVideoSoftwareRendererPutPixels;
33
34 renderer->engA.d.cache = NULL;
35 GBAVideoSoftwareRendererCreate(&renderer->engA);
36 renderer->engB.d.cache = NULL;
37 GBAVideoSoftwareRendererCreate(&renderer->engB);
38}
39
40static void DSVideoSoftwareRendererInit(struct DSVideoRenderer* renderer) {
41 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
42 softwareRenderer->engA.d.palette = &renderer->palette[0];
43 softwareRenderer->engA.d.oam = &renderer->oam->oam[0];
44 softwareRenderer->engA.masterEnd = DS_VIDEO_HORIZONTAL_PIXELS;
45 softwareRenderer->engA.outputBufferStride = softwareRenderer->outputBufferStride;
46 softwareRenderer->engB.d.palette = &renderer->palette[512];
47 softwareRenderer->engB.d.oam = &renderer->oam->oam[1];
48 softwareRenderer->engB.masterEnd = DS_VIDEO_HORIZONTAL_PIXELS;
49 softwareRenderer->engB.outputBufferStride = softwareRenderer->outputBufferStride;
50
51 DSVideoSoftwareRendererReset(renderer);
52}
53
54static void DSVideoSoftwareRendererReset(struct DSVideoRenderer* renderer) {
55 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
56 softwareRenderer->engA.d.reset(&softwareRenderer->engA.d);
57 softwareRenderer->engB.d.reset(&softwareRenderer->engB.d);
58}
59
60static void DSVideoSoftwareRendererDeinit(struct DSVideoRenderer* renderer) {
61 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
62 softwareRenderer->engA.d.deinit(&softwareRenderer->engA.d);
63 softwareRenderer->engB.d.deinit(&softwareRenderer->engB.d);
64}
65
66static void DSVideoSoftwareRendererUpdateDISPCNTA(struct DSVideoSoftwareRenderer* softwareRenderer) {
67 uint16_t fakeDispcnt = softwareRenderer->dispcntA & 0xFF87;
68 if (!DSRegisterDISPCNTIsTileObjMapping(softwareRenderer->dispcntA)) {
69 softwareRenderer->engA.tileStride = 0x20;
70 } else {
71 softwareRenderer->engA.tileStride = 0x20 << DSRegisterDISPCNTGetTileBoundary(softwareRenderer->dispcntA);
72 fakeDispcnt = GBARegisterDISPCNTFillObjCharacterMapping(fakeDispcnt);
73 }
74 softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, DS9_REG_A_DISPCNT_LO, fakeDispcnt);
75 uint32_t charBase = DSRegisterDISPCNTGetCharBase(softwareRenderer->dispcntA) << 16;
76 uint32_t screenBase = DSRegisterDISPCNTGetScreenBase(softwareRenderer->dispcntA) << 16;
77 softwareRenderer->engA.bg[0].charBase &= ~0x70000;
78 softwareRenderer->engA.bg[0].charBase |= charBase;
79 softwareRenderer->engA.bg[0].screenBase &= ~0x70000;
80 softwareRenderer->engA.bg[0].screenBase |= screenBase;
81 softwareRenderer->engA.bg[1].charBase &= ~0x70000;
82 softwareRenderer->engA.bg[1].charBase |= charBase;
83 softwareRenderer->engA.bg[1].screenBase &= ~0x70000;
84 softwareRenderer->engA.bg[1].screenBase |= screenBase;
85 softwareRenderer->engA.bg[2].charBase &= ~0x70000;
86 softwareRenderer->engA.bg[2].charBase |= charBase;
87 softwareRenderer->engA.bg[2].screenBase &= ~0x70000;
88 softwareRenderer->engA.bg[2].screenBase |= screenBase;
89 softwareRenderer->engA.bg[3].charBase &= ~0x70000;
90 softwareRenderer->engA.bg[3].charBase |= charBase;
91 softwareRenderer->engA.bg[3].screenBase &= ~0x70000;
92 softwareRenderer->engA.bg[3].screenBase |= screenBase;}
93
94static void DSVideoSoftwareRendererUpdateDISPCNTB(struct DSVideoSoftwareRenderer* softwareRenderer) {
95 uint16_t fakeDispcnt = softwareRenderer->dispcntB & 0xFF87;
96 if (!DSRegisterDISPCNTIsTileObjMapping(softwareRenderer->dispcntB)) {
97 softwareRenderer->engB.tileStride = 0x20;
98 } else {
99 softwareRenderer->engB.tileStride = 0x20 << DSRegisterDISPCNTGetTileBoundary(softwareRenderer->dispcntB);
100 fakeDispcnt = GBARegisterDISPCNTFillObjCharacterMapping(fakeDispcnt);
101 }
102 softwareRenderer->engB.d.writeVideoRegister(&softwareRenderer->engB.d, DS9_REG_A_DISPCNT_LO, fakeDispcnt);
103}
104
105static uint16_t DSVideoSoftwareRendererWriteVideoRegister(struct DSVideoRenderer* renderer, uint32_t address, uint16_t value) {
106 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
107 if (address >= DS9_REG_A_BG0CNT && address <= DS9_REG_A_BLDY) {
108 value = softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, address, value);
109 } else if (address >= DS9_REG_B_BG0CNT && address <= DS9_REG_B_BLDY) {
110 value = softwareRenderer->engB.d.writeVideoRegister(&softwareRenderer->engB.d, address & 0xFF, value);
111 } else {
112 mLOG(DS_VIDEO, STUB, "Stub video register write: %04X:%04X", address, value);
113 }
114 switch (address) {
115 case DS9_REG_A_DISPCNT_LO:
116 softwareRenderer->dispcntA &= 0xFFFF0000;
117 softwareRenderer->dispcntA |= value;
118 DSVideoSoftwareRendererUpdateDISPCNTA(softwareRenderer);
119 break;
120 case DS9_REG_A_DISPCNT_HI:
121 softwareRenderer->dispcntA &= 0x0000FFFF;
122 softwareRenderer->dispcntA |= value << 16;
123 DSVideoSoftwareRendererUpdateDISPCNTA(softwareRenderer);
124 break;
125 case DS9_REG_B_DISPCNT_LO:
126 softwareRenderer->dispcntB &= 0xFFFF0000;
127 softwareRenderer->dispcntB |= value;
128 DSVideoSoftwareRendererUpdateDISPCNTB(softwareRenderer);
129 break;
130 case DS9_REG_B_DISPCNT_HI:
131 softwareRenderer->dispcntB &= 0x0000FFFF;
132 softwareRenderer->dispcntB |= value << 16;
133 DSVideoSoftwareRendererUpdateDISPCNTB(softwareRenderer);
134 break;
135 case DS9_REG_POWCNT1:
136 value &= 0x810F;
137 softwareRenderer->powcnt = value;
138 }
139 return value;
140}
141
142static void DSVideoSoftwareRendererWritePalette(struct DSVideoRenderer* renderer, uint32_t address, uint16_t value) {
143 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
144 if (address < 0x400) {
145 softwareRenderer->engA.d.writePalette(&softwareRenderer->engA.d, address & 0x3FF, value);
146 } else {
147 softwareRenderer->engB.d.writePalette(&softwareRenderer->engB.d, address & 0x3FF, value);
148 }
149}
150
151static void DSVideoSoftwareRendererWriteOAM(struct DSVideoRenderer* renderer, uint32_t oam) {
152 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
153 if (oam < 0x200) {
154 softwareRenderer->engA.d.writeOAM(&softwareRenderer->engA.d, oam & 0x1FF);
155 } else {
156 softwareRenderer->engB.d.writeOAM(&softwareRenderer->engB.d, oam & 0x1FF);
157 }
158}
159
160static void _drawScanlineA(struct DSVideoSoftwareRenderer* softwareRenderer, int y) {
161 memcpy(softwareRenderer->engA.d.vramBG, softwareRenderer->d.vramABG, sizeof(softwareRenderer->engA.d.vramBG));
162 memcpy(softwareRenderer->engA.d.vramOBJ, softwareRenderer->d.vramAOBJ, sizeof(softwareRenderer->engA.d.vramOBJ));
163 color_t* row = &softwareRenderer->engA.outputBuffer[softwareRenderer->outputBufferStride * y];
164
165 int x;
166 switch (DSRegisterDISPCNTGetDispMode(softwareRenderer->dispcntA)) {
167 case 0:
168 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
169 row[x] = GBA_COLOR_WHITE;
170 }
171 return;
172 case 1:
173 softwareRenderer->engA.d.drawScanline(&softwareRenderer->engA.d, y);
174 return;
175 case 2: {
176 uint16_t* vram = &softwareRenderer->d.vram[0x10000 * DSRegisterDISPCNTGetVRAMBlock(softwareRenderer->dispcntA)];
177 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
178 color_t color;
179 LOAD_16(color, (x + y * DS_VIDEO_HORIZONTAL_PIXELS) * 2, vram);
180#ifndef COLOR_16_BIT
181 unsigned color32 = 0;
182 color32 |= (color << 9) & 0xF80000;
183 color32 |= (color << 3) & 0xF8;
184 color32 |= (color << 6) & 0xF800;
185 color32 |= (color32 >> 5) & 0x070707;
186 color = color32;
187#elif COLOR_5_6_5
188 uint16_t color16 = 0;
189 color16 |= (color & 0x001F) << 11;
190 color16 |= (color & 0x03E0) << 1;
191 color16 |= (color & 0x7C00) >> 10;
192 color = color16;
193#endif
194 softwareRenderer->row[x] = color;
195 }
196 break;
197 }
198 case 3:
199 break;
200 }
201
202#ifdef COLOR_16_BIT
203#if defined(__ARM_NEON) && !defined(__APPLE__)
204 _to16Bit(row, softwareRenderer->row, DS_VIDEO_HORIZONTAL_PIXELS);
205#else
206 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
207 row[x] = softwareRenderer->row[x];
208 }
209#endif
210#else
211 memcpy(row, softwareRenderer->row, DS_VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
212#endif
213}
214
215static void _drawScanlineB(struct DSVideoSoftwareRenderer* softwareRenderer, int y) {
216 memcpy(softwareRenderer->engB.d.vramBG, softwareRenderer->d.vramBBG, sizeof(softwareRenderer->engB.d.vramBG));
217 memcpy(softwareRenderer->engB.d.vramOBJ, softwareRenderer->d.vramBOBJ, sizeof(softwareRenderer->engB.d.vramOBJ));
218 color_t* row = &softwareRenderer->engB.outputBuffer[softwareRenderer->outputBufferStride * y];
219
220 int x;
221 switch (DSRegisterDISPCNTGetDispMode(softwareRenderer->dispcntB)) {
222 case 0:
223 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
224 row[x] = GBA_COLOR_WHITE;
225 }
226 return;
227 case 1:
228 softwareRenderer->engB.d.drawScanline(&softwareRenderer->engB.d, y);
229 return;
230 }
231
232#ifdef COLOR_16_BIT
233#if defined(__ARM_NEON) && !defined(__APPLE__)
234 _to16Bit(row, softwareRenderer->row, DS_VIDEO_HORIZONTAL_PIXELS);
235#else
236 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
237 row[x] = softwareRenderer->row[x];
238 }
239#endif
240#else
241 memcpy(row, softwareRenderer->row, DS_VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
242#endif
243}
244
245static void DSVideoSoftwareRendererDrawScanline(struct DSVideoRenderer* renderer, int y) {
246 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
247 if (!DSRegisterPOWCNT1IsSwap(softwareRenderer->powcnt)) {
248 softwareRenderer->engA.outputBuffer = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * DS_VIDEO_VERTICAL_PIXELS];
249 softwareRenderer->engB.outputBuffer = softwareRenderer->outputBuffer;
250 } else {
251 softwareRenderer->engA.outputBuffer = softwareRenderer->outputBuffer;
252 softwareRenderer->engB.outputBuffer = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * DS_VIDEO_VERTICAL_PIXELS];
253 }
254
255 _drawScanlineA(softwareRenderer, y);
256 _drawScanlineB(softwareRenderer, y);
257}
258
259static void DSVideoSoftwareRendererFinishFrame(struct DSVideoRenderer* renderer) {
260 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
261 softwareRenderer->engA.d.finishFrame(&softwareRenderer->engA.d);
262 softwareRenderer->engB.d.finishFrame(&softwareRenderer->engB.d);
263}
264
265static void DSVideoSoftwareRendererGetPixels(struct DSVideoRenderer* renderer, size_t* stride, const void** pixels) {
266 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
267#ifdef COLOR_16_BIT
268#error Not yet supported
269#else
270 *stride = softwareRenderer->outputBufferStride;
271 *pixels = softwareRenderer->outputBuffer;
272#endif
273}
274
275static void DSVideoSoftwareRendererPutPixels(struct DSVideoRenderer* renderer, size_t stride, const void* pixels) {
276}