Initial NDS Universal-Core

2026-07-03 08:49:05 +00:00 · 2021-01-13 15:51:37 -06:00
commit 8a55d0e7cb
13 changed files with 2060 additions and 0 deletions
@@ -0,0 +1,141 @@
+#include "image.hpp"
+
+#include "tonccpy.h"
+
+Image::Image(const std::vector<std::string> &paths) {
+	// Attempt to load from the given paths
+	FILE *file = nullptr;
+	for(const auto &path : paths) {
+		file = fopen(path.c_str(), "rb");
+		if(file)
+			break;
+	}
+
+	// Return if no file found
+	if(!file)
+		return;
+
+	// Return if not in the correct format
+	char magic[5] = {0};
+	fread(magic, 1, 4, file);
+	if(strcmp(magic, ".GFX"))
+		return;
+
+	// Read image
+	fread(&_width, 1, 2, file);
+	fread(&_height, 1, 2, file);
+	_bitmap = std::vector<u8>(_width * _height);
+	fread(_bitmap.data(), 1, _bitmap.size(), file);
+	u16 palCount;
+	fread(&palCount, 1, 2, file);
+	fread(&_palOfs, 1, 2, file);
+	_palette = std::vector<u16>(palCount);
+	fread(_palette.data(), 2, palCount, file);
+	fclose(file);
+}
+
+Image::Image(FILE *file) {
+	// Return if no file
+	if(!file)
+		return;
+
+	// Return if not in the correct format
+	char magic[5];
+	fread(magic, 1, 4, file);
+	if(strcmp(magic, ".GFX"))
+		return;
+
+	// Read image
+	fread(&_width, 1, 2, file);
+	fread(&_height, 1, 2, file);
+	_bitmap = std::vector<u8>(_width * _height);
+	fread(_bitmap.data(), 1, _bitmap.size(), file);
+	u16 palCount;
+	fread(&palCount, 1, 2, file);
+	fread(&_palOfs, 1, 2, file);
+	_palette = std::vector<u16>(palCount);
+	fread(_palette.data(), 2, palCount, file);
+	fclose(file);
+}
+
+void Image::draw(int x, int y, bool top, int layer, int channel, bool copyPal) {
+	if(copyPal)
+		tonccpy((top ? BG_PALETTE : BG_PALETTE_SUB) + _palOfs, _palette.data(), _palette.size() * 2);
+
+	u8 *dst   = (u8 *)bgGetGfxPtr(top ? layer : layer + 4);
+	int width = 256;
+
+	// If full width and X is 0, copy it all in one go
+	if(_width == width && x == 0) {
+		dmaCopyHalfWords(channel, _bitmap.data(), dst, _width * _height);
+	} else {
+		for(int i = 0; i < _height; i++) {
+			dmaCopyHalfWords(channel, _bitmap.data() + (i * _width), dst + (y + i) * 256 + x, _width);
+		}
+	}
+}
+
+void Image::drawSpecial(int x, int y, bool top, int layer, float scaleX, float scaleY, int paletteOffset,
+						bool copyPal) {
+	if(copyPal)
+		tonccpy((top ? BG_PALETTE : BG_PALETTE_SUB) + _palOfs + paletteOffset, _palette.data(), _palette.size() * 2);
+
+	u8 *dst = (u8 *)bgGetGfxPtr(top ? layer : layer + 4);
+
+	// If the scale is 1 use faster integer math
+	if(scaleX == 1.0f && scaleY == 1.0f) {
+		for(int i = 0; i < _height; i++) {
+			for(float j = 0; j < _width; j++) {
+				u8 px = _bitmap[i * _width + j];
+				if(_palette[px - _palOfs] & 0x8000)
+					toncset(dst + int((y + i) * 256 + x + j), px + paletteOffset, 1);
+			}
+		}
+	} else {
+		for(float i = 0.0f; i < _height; i += 1 / scaleY) {
+			for(float j = 0.0f; j < _width; j += 1 / scaleX) {
+				u8 px = _bitmap[int((i * _width) + j)];
+				if(_palette[px - _palOfs] & 0x8000)
+					toncset(dst + int((y + i) * 256 + x + j), px + paletteOffset, 1);
+			}
+		}
+	}
+}
+
+void Image::drawSegment(int x, int y, int imageX, int imageY, int w, int h, bool top, int layer, int channel,
+						bool copyPal) {
+	if(copyPal)
+		tonccpy((top ? BG_PALETTE : BG_PALETTE_SUB) + _palOfs, _palette.data(), _palette.size() * 2);
+
+	for(int i = 0; i < h; i++) {
+		dmaCopyHalfWords(channel, _bitmap.data() + ((imageY + i) * _width) + imageX,
+						 (u8 *)bgGetGfxPtr(top ? layer : layer + 4) + ((y + i) * 256) + x, w);
+	}
+}
+
+void Image::drawSegmentSpecial(int x, int y, int imageX, int imageY, int w, int h, bool top, int layer, float scaleX,
+							   float scaleY, int paletteOffset, bool copyPal) {
+	if(copyPal)
+		tonccpy((top ? BG_PALETTE : BG_PALETTE_SUB) + _palOfs + paletteOffset, _palette.data(), _palette.size() * 2);
+
+	u8 *dst = (u8 *)bgGetGfxPtr(top ? layer : layer + 4);
+
+	// If the scale is 1 use faster integer math
+	if(scaleX == 1.0f && scaleY == 1.0f) {
+		for(int i = 0; i < h; i++) {
+			for(int j = 0; j < w; j++) {
+				u8 px = _bitmap[i * _width + j];
+				if(_palette[px - _palOfs] & 0x8000)
+					toncset(dst + ((y + i) * 256 + x + j), px + paletteOffset, 1);
+			}
+		}
+	} else {
+		for(float i = 0; i < h; i += 1 / scaleX) {
+			for(float j = 0; j < _width; j += 1 / scaleY) {
+				u8 px = _bitmap[i * _width + j];
+				if(_palette[px - _palOfs] & 0x8000)
+					toncset(dst + int((y + i) * 256 + x + j), px + paletteOffset, 1);
+			}
+		}
+	}
+}