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.d.writeVideoRegister(&softwareRenderer->engA.d, DS9_REG_A_BG0CNT, softwareRenderer->engA.bg[0].control);
78 softwareRenderer->engA.bg[0].charBase += charBase;
79 softwareRenderer->engA.bg[0].screenBase &= ~0x70000;
80 softwareRenderer->engA.bg[0].screenBase |= screenBase;
81 softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, DS9_REG_A_BG1CNT, softwareRenderer->engA.bg[1].control);
82 softwareRenderer->engA.bg[1].charBase += charBase;
83 softwareRenderer->engA.bg[1].screenBase &= ~0x70000;
84 softwareRenderer->engA.bg[1].screenBase |= screenBase;
85 softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, DS9_REG_A_BG2CNT, softwareRenderer->engA.bg[2].control);
86 softwareRenderer->engA.bg[2].charBase += charBase;
87 softwareRenderer->engA.bg[2].screenBase &= ~0x70000;
88 softwareRenderer->engA.bg[2].screenBase |= screenBase;
89 softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, DS9_REG_A_BG3CNT, softwareRenderer->engA.bg[3].control);
90 softwareRenderer->engA.bg[3].charBase += charBase;
91 softwareRenderer->engA.bg[3].screenBase &= ~0x70000;
92 softwareRenderer->engA.bg[3].screenBase |= screenBase;
93}
94
95static void DSVideoSoftwareRendererUpdateDISPCNTB(struct DSVideoSoftwareRenderer* softwareRenderer) {
96 uint16_t fakeDispcnt = softwareRenderer->dispcntB & 0xFF87;
97 if (!DSRegisterDISPCNTIsTileObjMapping(softwareRenderer->dispcntB)) {
98 softwareRenderer->engB.tileStride = 0x20;
99 } else {
100 softwareRenderer->engB.tileStride = 0x20 << DSRegisterDISPCNTGetTileBoundary(softwareRenderer->dispcntB);
101 fakeDispcnt = GBARegisterDISPCNTFillObjCharacterMapping(fakeDispcnt);
102 }
103 softwareRenderer->engB.d.writeVideoRegister(&softwareRenderer->engB.d, DS9_REG_A_DISPCNT_LO, fakeDispcnt);
104}
105
106static uint16_t DSVideoSoftwareRendererWriteVideoRegister(struct DSVideoRenderer* renderer, uint32_t address, uint16_t value) {
107 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
108 if (address >= DS9_REG_A_BG0CNT && address <= DS9_REG_A_BLDY) {
109 value = softwareRenderer->engA.d.writeVideoRegister(&softwareRenderer->engA.d, address, value);
110 } else if (address >= DS9_REG_B_BG0CNT && address <= DS9_REG_B_BLDY) {
111 value = softwareRenderer->engB.d.writeVideoRegister(&softwareRenderer->engB.d, address & 0xFF, value);
112 } else {
113 mLOG(DS_VIDEO, STUB, "Stub video register write: %04X:%04X", address, value);
114 }
115 switch (address) {
116 case DS9_REG_A_DISPCNT_LO:
117 softwareRenderer->dispcntA &= 0xFFFF0000;
118 softwareRenderer->dispcntA |= value;
119 DSVideoSoftwareRendererUpdateDISPCNTA(softwareRenderer);
120 break;
121 case DS9_REG_A_DISPCNT_HI:
122 softwareRenderer->dispcntA &= 0x0000FFFF;
123 softwareRenderer->dispcntA |= value << 16;
124 DSVideoSoftwareRendererUpdateDISPCNTA(softwareRenderer);
125 break;
126 case DS9_REG_B_DISPCNT_LO:
127 softwareRenderer->dispcntB &= 0xFFFF0000;
128 softwareRenderer->dispcntB |= value;
129 DSVideoSoftwareRendererUpdateDISPCNTB(softwareRenderer);
130 break;
131 case DS9_REG_B_DISPCNT_HI:
132 softwareRenderer->dispcntB &= 0x0000FFFF;
133 softwareRenderer->dispcntB |= value << 16;
134 DSVideoSoftwareRendererUpdateDISPCNTB(softwareRenderer);
135 break;
136 case DS9_REG_POWCNT1:
137 value &= 0x810F;
138 softwareRenderer->powcnt = value;
139 }
140 return value;
141}
142
143static void DSVideoSoftwareRendererWritePalette(struct DSVideoRenderer* renderer, uint32_t address, uint16_t value) {
144 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
145 if (address < 0x400) {
146 softwareRenderer->engA.d.writePalette(&softwareRenderer->engA.d, address & 0x3FF, value);
147 } else {
148 softwareRenderer->engB.d.writePalette(&softwareRenderer->engB.d, address & 0x3FF, value);
149 }
150}
151
152static void DSVideoSoftwareRendererWriteOAM(struct DSVideoRenderer* renderer, uint32_t oam) {
153 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
154 if (oam < 0x200) {
155 softwareRenderer->engA.d.writeOAM(&softwareRenderer->engA.d, oam & 0x1FF);
156 } else {
157 softwareRenderer->engB.d.writeOAM(&softwareRenderer->engB.d, oam & 0x1FF);
158 }
159}
160
161static void _drawScanlineA(struct DSVideoSoftwareRenderer* softwareRenderer, int y) {
162 memcpy(softwareRenderer->engA.d.vramBG, softwareRenderer->d.vramABG, sizeof(softwareRenderer->engA.d.vramBG));
163 memcpy(softwareRenderer->engA.d.vramOBJ, softwareRenderer->d.vramAOBJ, sizeof(softwareRenderer->engA.d.vramOBJ));
164 color_t* row = &softwareRenderer->engA.outputBuffer[softwareRenderer->outputBufferStride * y];
165
166 int x;
167 switch (DSRegisterDISPCNTGetDispMode(softwareRenderer->dispcntA)) {
168 case 0:
169 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
170 row[x] = GBA_COLOR_WHITE;
171 }
172 return;
173 case 1:
174 softwareRenderer->engA.d.drawScanline(&softwareRenderer->engA.d, y);
175 return;
176 case 2: {
177 uint16_t* vram = &softwareRenderer->d.vram[0x10000 * DSRegisterDISPCNTGetVRAMBlock(softwareRenderer->dispcntA)];
178 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
179 color_t color;
180 LOAD_16(color, (x + y * DS_VIDEO_HORIZONTAL_PIXELS) * 2, vram);
181#ifndef COLOR_16_BIT
182 unsigned color32 = 0;
183 color32 |= (color << 9) & 0xF80000;
184 color32 |= (color << 3) & 0xF8;
185 color32 |= (color << 6) & 0xF800;
186 color32 |= (color32 >> 5) & 0x070707;
187 color = color32;
188#elif COLOR_5_6_5
189 uint16_t color16 = 0;
190 color16 |= (color & 0x001F) << 11;
191 color16 |= (color & 0x03E0) << 1;
192 color16 |= (color & 0x7C00) >> 10;
193 color = color16;
194#endif
195 softwareRenderer->row[x] = color;
196 }
197 break;
198 }
199 case 3:
200 break;
201 }
202
203#ifdef COLOR_16_BIT
204#if defined(__ARM_NEON) && !defined(__APPLE__)
205 _to16Bit(row, softwareRenderer->row, DS_VIDEO_HORIZONTAL_PIXELS);
206#else
207 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
208 row[x] = softwareRenderer->row[x];
209 }
210#endif
211#else
212 memcpy(row, softwareRenderer->row, DS_VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
213#endif
214}
215
216static void _drawScanlineB(struct DSVideoSoftwareRenderer* softwareRenderer, int y) {
217 memcpy(softwareRenderer->engB.d.vramBG, softwareRenderer->d.vramBBG, sizeof(softwareRenderer->engB.d.vramBG));
218 memcpy(softwareRenderer->engB.d.vramOBJ, softwareRenderer->d.vramBOBJ, sizeof(softwareRenderer->engB.d.vramOBJ));
219 color_t* row = &softwareRenderer->engB.outputBuffer[softwareRenderer->outputBufferStride * y];
220
221 int x;
222 switch (DSRegisterDISPCNTGetDispMode(softwareRenderer->dispcntB)) {
223 case 0:
224 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
225 row[x] = GBA_COLOR_WHITE;
226 }
227 return;
228 case 1:
229 softwareRenderer->engB.d.drawScanline(&softwareRenderer->engB.d, y);
230 return;
231 }
232
233#ifdef COLOR_16_BIT
234#if defined(__ARM_NEON) && !defined(__APPLE__)
235 _to16Bit(row, softwareRenderer->row, DS_VIDEO_HORIZONTAL_PIXELS);
236#else
237 for (x = 0; x < DS_VIDEO_HORIZONTAL_PIXELS; ++x) {
238 row[x] = softwareRenderer->row[x];
239 }
240#endif
241#else
242 memcpy(row, softwareRenderer->row, DS_VIDEO_HORIZONTAL_PIXELS * sizeof(*row));
243#endif
244}
245
246static void DSVideoSoftwareRendererDrawScanline(struct DSVideoRenderer* renderer, int y) {
247 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
248 if (!DSRegisterPOWCNT1IsSwap(softwareRenderer->powcnt)) {
249 softwareRenderer->engA.outputBuffer = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * DS_VIDEO_VERTICAL_PIXELS];
250 softwareRenderer->engB.outputBuffer = softwareRenderer->outputBuffer;
251 } else {
252 softwareRenderer->engA.outputBuffer = softwareRenderer->outputBuffer;
253 softwareRenderer->engB.outputBuffer = &softwareRenderer->outputBuffer[softwareRenderer->outputBufferStride * DS_VIDEO_VERTICAL_PIXELS];
254 }
255
256 _drawScanlineA(softwareRenderer, y);
257 _drawScanlineB(softwareRenderer, y);
258}
259
260static void DSVideoSoftwareRendererFinishFrame(struct DSVideoRenderer* renderer) {
261 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
262 softwareRenderer->engA.d.finishFrame(&softwareRenderer->engA.d);
263 softwareRenderer->engB.d.finishFrame(&softwareRenderer->engB.d);
264}
265
266static void DSVideoSoftwareRendererGetPixels(struct DSVideoRenderer* renderer, size_t* stride, const void** pixels) {
267 struct DSVideoSoftwareRenderer* softwareRenderer = (struct DSVideoSoftwareRenderer*) renderer;
268#ifdef COLOR_16_BIT
269#error Not yet supported
270#else
271 *stride = softwareRenderer->outputBufferStride;
272 *pixels = softwareRenderer->outputBuffer;
273#endif
274}
275
276static void DSVideoSoftwareRendererPutPixels(struct DSVideoRenderer* renderer, size_t stride, const void* pixels) {
277}