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43 lines
1.4 KiB
43 lines
1.4 KiB
#include "util.h"
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static RenderableBuffer* sRenderableBuffer = nullptr;
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void InitRenderableBuffer(HDC dc, int width, int height)
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{
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sRenderableBuffer = new RenderableBuffer();
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sRenderableBuffer->mDC = CreateCompatibleDC(dc);
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BITMAPINFO bitmapinfo = {};
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bitmapinfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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bitmapinfo.bmiHeader.biPlanes = 1;
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bitmapinfo.bmiHeader.biBitCount = 32;
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bitmapinfo.bmiHeader.biCompression = BI_RGB;
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bitmapinfo.bmiHeader.biWidth = width;
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bitmapinfo.bmiHeader.biHeight = height;
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sRenderableBuffer->mBitmap = CreateDIBSection(sRenderableBuffer->mDC, &bitmapinfo, DIB_RGB_COLORS, (void**)&sRenderableBuffer->mColorBuffer, 0, 0);
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SelectObject(sRenderableBuffer->mDC, sRenderableBuffer->mBitmap);
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sRenderableBuffer->mHeight = height;
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sRenderableBuffer->mWidth = width;
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sRenderableBuffer->mPixelCount = height * width;
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}
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void SetColor(int x, int y, AByte r, AByte g, AByte b, AByte a)
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{
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AUint color = (a << 24) + (r << 16) + (g << 8) + b;
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int pixel_index = y * sRenderableBuffer->mWidth + x;
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if (pixel_index < sRenderableBuffer->mPixelCount) {
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sRenderableBuffer->mColorBuffer[pixel_index] = color;
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}
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}
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void ASwapBuffers(HDC dc)
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{
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BitBlt(dc, 0, 0, sRenderableBuffer->mWidth, sRenderableBuffer->mHeight, sRenderableBuffer->mDC, 0,0, SRCCOPY);
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}
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float randf()
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{
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return float(rand()) / float(RAND_MAX);
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}
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float srandf()
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{
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return randf() * 2.0f - 1.0f;
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}
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