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73 lines
No EOL
2.6 KiB
C#
73 lines
No EOL
2.6 KiB
C#
// ClassicalSharp copyright 2014-2016 UnknownShadow200 | Licensed under MIT
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using System;
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using System.Drawing;
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using ClassicalSharp;
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namespace Launcher.Drawing {
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public unsafe static class BitmapDrawer {
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public static void DrawIndexed(byte[] indices, FastColour[] palette,
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int size, int x, int y, FastBitmap dst) {
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int* argb = stackalloc int[palette.Length];
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for (int i = 0; i < palette.Length; i++)
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argb[i] = palette[i].ToArgb();
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for (int i = 0, yy = 0; yy < size; yy++) {
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if ((y + yy) < 0) { i += size; continue; }
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if ((y + yy) >= dst.Height) break;
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int* row = dst.GetRowPtr(y + yy);
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for (int xx = 0; xx < size; xx++) {
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int col = argb[indices[i]]; i++;
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if (col == 0) continue; // transparent pixel
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if ((x + xx) < 0 || (x + xx) >= dst.Width) continue;
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row[x + xx] = col;
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}
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}
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}
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public static void DrawScaled(FastBitmap src, FastBitmap dst, Size scale,
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Rectangle srcRect, Rectangle dstRect, byte scaleA, byte scaleB) {
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int srcWidth = srcRect.Width, dstWidth = dstRect.Width;
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int srcHeight = srcRect.Height, dstHeight = dstRect.Height;
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int srcX = srcRect.X, dstX = dstRect.X;
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int srcY = srcRect.Y, dstY = dstRect.Y;
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int scaleWidth = scale.Width, scaleHeight = scale.Height;
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for (int yy = 0; yy < dstHeight; yy++) {
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int scaledY = (yy + dstY) * srcHeight / scaleHeight;
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int* srcRow = src.GetRowPtr(srcY + (scaledY % srcHeight));
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int* dstRow = dst.GetRowPtr(dstY + yy);
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byte rgbScale = (byte)Utils.Lerp(scaleA, scaleB, (float)yy / dstHeight);
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for (int xx = 0; xx < dstWidth; xx++) {
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int scaledX = (xx + dstX) * srcWidth / scaleWidth;
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int pixel = srcRow[srcX + (scaledX % srcWidth)];
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int col = pixel & ~0xFFFFFF; // keep a, but clear rgb
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col |= ((pixel & 0xFF) * rgbScale / 255);
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col |= (((pixel >> 8) & 0xFF) * rgbScale / 255) << 8;
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col |= (((pixel >> 16) & 0xFF) * rgbScale / 255) << 16;
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dstRow[dstX + xx] = col;
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}
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}
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}
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public static void DrawTiled(FastBitmap src, FastBitmap dst,
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Rectangle srcRect, Rectangle dstRect) {
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int srcX = srcRect.X, srcWidth = srcRect.Width, srcHeight = srcRect.Height;
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int x, y, width, height;
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if (!Drawer2DExt.ClampCoords(dst, dstRect, out x, out y, out width, out height))
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return;
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for (int yy = 0; yy < height; yy++) {
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// srcY is always 0 so we don't need to add
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int* srcRow = src.GetRowPtr(((yy + y) % srcHeight));
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int* dstRow = dst.GetRowPtr(y + yy);
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for (int xx = 0; xx < width; xx++)
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dstRow[x + xx] = srcRow[srcX + ((xx + x) % srcWidth)];
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}
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}
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}
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} |