3DS: Add 3DS main file

src/platform/3ds/3ds-vfs.c

@@ -10,8 +10,6 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "3ds-vfs.h"
 
-#include "util/vfs.h"
-
 #include "util/memory.h"
 
 struct VFile3DS {

src/platform/3ds/3ds-vfs.h

@@ -8,6 +8,8 @@
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "util/vfs.h"
+
 #include <3ds.h>
 
 struct VFile* VFileOpen3DS(FS_archive archive, const char* path, int flags);

src/platform/3ds/main.c

@@ -0,0 +1,98 @@
+/* Copyright (c) 2013-2014 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "gba.h"
+#include "gba-video.h"
+
+#include "renderers/video-software.h"
+
+#include "3ds-vfs.h"
+
+#include <3ds.h>
+
+int main() {
+	srvInit();
+	aptInit();
+	hidInit(0);
+	gfxInit();
+	fsInit();
+
+	gfxSetScreenFormat(GFX_BOTTOM, GSP_RGBA8_OES);
+
+	struct GBAVideoSoftwareRenderer renderer;
+	GBAVideoSoftwareRendererCreate(&renderer);
+
+	size_t stride = sizeof(color_t) * VIDEO_HORIZONTAL_PIXELS * BYTES_PER_PIXEL;
+	color_t* videoBuffer = malloc(stride * VIDEO_VERTICAL_PIXELS);
+	struct GBA* gba = malloc(sizeof(struct GBA));
+	struct ARMCore* cpu = malloc(sizeof(struct ARMCore));
+	int activeKeys = 0;
+
+	renderer.outputBuffer = videoBuffer;
+	renderer.outputBufferStride = stride;
+
+	gba->keySource = &activeKeys;
+	gba->sync = 0;
+
+	FS_archive sdmcArchive = (FS_archive) {
+		ARCH_SDMC,
+		(FS_path) { PATH_EMPTY, 1, (u8*)"" },
+		0, 0
+	};
+    
+    struct VFile* rom = VFileOpen3DS(sdmcArchive, "/rom.gba", O_RDONLY);
+    struct VFile* save = VFileOpen3DS(sdmcArchive, "/rom.sav", O_RDWR | O_CREAT);
+
+	GBACreate(gba);
+	ARMSetComponents(cpu, &gba->d, 0, 0);
+	ARMInit(cpu);
+
+	GBAVideoAssociateRenderer(&gba->video, &renderer.d);
+
+	GBALoadROM(gba, rom, save, "rom.gba");
+
+	ARMReset(cpu);
+
+	bool seenVblank = false;
+	while (aptMainLoop()) {
+		hidScanInput();
+
+		ARMRunLoop(cpu);
+
+		if (!seenVblank) {
+			if (GBARegisterDISPSTATIsInVblank(gba->video.dispstat)) {
+				u16 width, height;
+				u8* screen = gfxGetFramebuffer(GFX_BOTTOM, GFX_BOTTOM, &width, &height);
+				int y;
+				for (y = 0; y < VIDEO_VERTICAL_PIXELS; ++y) {
+					u8* row = &screen[(width - VIDEO_HORIZONTAL_PIXELS) * BYTES_PER_PIXEL / 2];
+					row = &row[width * BYTES_PER_PIXEL * (((height - VIDEO_VERTICAL_PIXELS) / 2) + y)];
+					memcpy(row, &videoBuffer[stride * y], stride);
+				}
+
+				gfxSwapBuffersGpu();
+				gspWaitForEvent(GSPEVENT_VBlank0, false);
+			}
+		}
+
+		seenVblank = GBARegisterDISPSTATIsInVblank(gba->video.dispstat);
+	}
+
+	ARMDeinit(cpu);
+	GBADestroy(gba);
+
+	free(gba);
+	free(cpu);
+
+	rom->close(rom);
+	save->close(save);
+
+	fsExit();
+	gfxExit();
+	hidExit();
+	aptExit();
+	srvExit();
+	return 0;
+}