sys_initial_check OK (#129)

* initial commit

* almost matching, need to figure out segment stuff

* fully matching

* file description

* m_std_dma

1 files changed, 82 insertions, 0 deletions

diff --git a/src/code/sys_initial_check.c b/src/code/sys_initial_check.c
new file mode 100644
index 0000000..dbaf917
--- /dev/null
+++ b/src/code/sys_initial_check.c
@@ -0,0 +1,82 @@
+/**
+ * @file sys_initial_check.c
+ * Functions for checking the TV type (PAL/NTSC/MPAL), and printing an error message to the screen if it's not NTSC
+ */
+
+#include "color.h"
+#include "macros.h"
+#include "m_std_dma.h"
+#include "segment_symbols.h"
+#include "fault.h"
+
+void Check_WriteRGBA16Pixel(u16* buffer, u32 x, u32 y, u32 value) {
+    if (value & RGBA16_PIXEL_OPAQUE) {
+        (&buffer[x])[y * SCREEN_WIDTH] = value;
+    }
+}
+
+void Check_WriteI4Pixel(u16* buffer, u32 x, u32 y, u32 value) {
+    Check_WriteRGBA16Pixel(buffer, x, y, value * GPACK_RGBA5551(16, 16, 16, 0) + GPACK_RGBA5551(12, 12, 12, 1));
+}
+
+void Check_DrawI4Texture(u16* buffer, s32 x, s32 y, s32 width, s32 height, u8* texture) {
+    s32 v;
+    s32 u;
+    u8 pixelPair;
+    u8* pixelPairPointer = texture;
+
+    for (v = 0; v < height; v++) {
+        for (u = 0; u < width; u += 2, pixelPairPointer++) {
+            pixelPair = *pixelPairPointer;
+            Check_WriteI4Pixel(buffer, x + u, y + v, pixelPair >> 4);
+            pixelPair = *pixelPairPointer;
+            Check_WriteI4Pixel(buffer, x + u + 1, y + v, pixelPair & 0xF);
+        }
+    }
+}
+
+void Check_ClearRGBA16(u16* buffer) {
+    u32 x;
+    u32 y;
+
+    for (y = 0; y < SCREEN_HEIGHT; y++) {
+        for (x = 0; x < SCREEN_WIDTH; x++) {
+            Check_WriteRGBA16Pixel(buffer, x, y, 1);
+        }
+    }
+}
+
+#define ERROR_TEXTURE_WIDTH 208
+#define ERROR_TEXTURE_HEIGHT 16
+#define ERROR_TEXTURE_SIZE (ERROR_TEXTURE_WIDTH * ERROR_TEXTURE_HEIGHT / 2)
+#define ERROR_TEXTURE_VRAM (u8*)((uintptr_t)FAULT_FB_ADDRESS - ERROR_TEXTURE_SIZE)
+u8 Check_ErrorTextureYCoords[] = { 112, 0 };
+
+void Check_DrawRegionLockErrorMessage(void) {
+    s32 i;
+
+    DmaMgr_RequestSyncDebug(ERROR_TEXTURE_VRAM, SEGMENT_ROM_START(locerrmsg), SEGMENT_VRAM_SIZE(locerrmsg),
+                            "../sys_initial_check.c", 130);
+    Check_ClearRGBA16(FAULT_FB_ADDRESS);
+    for (i = 0; i < 1; i++) {
+        Check_DrawI4Texture(FAULT_FB_ADDRESS, 56, Check_ErrorTextureYCoords[i], ERROR_TEXTURE_WIDTH,
+                            ERROR_TEXTURE_HEIGHT, ERROR_TEXTURE_VRAM + i * ERROR_TEXTURE_SIZE);
+    }
+    osWritebackDCacheAll();
+    osViSwapBuffer(FAULT_FB_ADDRESS);
+    osViBlack(false);
+}
+
+void Check_RegionIsSupported(void) {
+    s32 regionSupported = false;
+
+    if (osTvType == OS_TV_NTSC) {
+        regionSupported = true;
+    }
+
+    if (!regionSupported) {
+        Check_DrawRegionLockErrorMessage();
+        osDestroyThread(NULL);
+        while (true) {};
+    }
+}