79 lines
2 KiB
C
79 lines
2 KiB
C
#ifndef _LCR_RENDERER_H
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#define _LCR_RENDERER_H
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struct LCR_Renderer
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{
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// TODO
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};
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void LCR_drawBackground(int verticalOffset)
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{
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uint16_t color = LCR_skyImages[LCR_skyImages[256] & 0x00ff] ; // TODO
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int limit = verticalOffset - LCR_SETTING_SKY_SIZE * LCR_SKY_IMAGE_SIZE / 2;
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if (limit >= LCR_EFFECTIVE_RESOLUTION_Y)
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limit = LCR_EFFECTIVE_RESOLUTION_Y - 1;
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for (int y = 0; y <= limit; ++y)
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for (int x = 0; x < LCR_EFFECTIVE_RESOLUTION_X; ++x)
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LCR_drawPixelUnsafe(x,y,color);
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color = LCR_skyImages[LCR_skyImages[255 + (128 * 128) / 2] >> 8]; // TODO
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limit = verticalOffset + LCR_SETTING_SKY_SIZE * LCR_SKY_IMAGE_SIZE / 2 -
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LCR_SETTING_SKY_SIZE;
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if (limit < 0)
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limit = 0;
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for (int y = LCR_EFFECTIVE_RESOLUTION_Y - 1; y >= limit; --y)
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for (int x = 0; x < LCR_EFFECTIVE_RESOLUTION_X; ++x)
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LCR_drawPixelUnsafe(x,y,color);
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}
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void LCR_drawSkyStrip(int verticalOffset, uint8_t horizontalOffset)
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{
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#if LCR_SETTING_SKY_SIZE != 0
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verticalOffset -= (LCR_SETTING_SKY_SIZE * LCR_SKY_IMAGE_SIZE) / 2;
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int finalY = verticalOffset + LCR_SETTING_SKY_SIZE * LCR_SKY_IMAGE_SIZE;
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finalY = (finalY / LCR_SETTING_SKY_SIZE) * LCR_SETTING_SKY_SIZE;
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if (finalY >= LCR_EFFECTIVE_RESOLUTION_Y)
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finalY = LCR_EFFECTIVE_RESOLUTION_Y - 1;
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const uint16_t *skyLine = LCR_skyImages + 256;
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if (verticalOffset < 0)
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{
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skyLine += (-1 * verticalOffset / LCR_SETTING_SKY_SIZE) * (LCR_SKY_IMAGE_SIZE / 2);
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verticalOffset = 0;
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}
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while (verticalOffset < finalY)
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{
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for (int i = 0; i < LCR_EFFECTIVE_RESOLUTION_X; ++i)
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{
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// TODO: check z-buffer
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int offsetX = (i / LCR_SETTING_SKY_SIZE + horizontalOffset)
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% LCR_SKY_IMAGE_SIZE;
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uint16_t pixel = *(skyLine + offsetX / 2);
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pixel = offsetX % 2 ? (pixel >> 8) : (pixel & 0x00ff);
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LCR_drawPixelUnsafe(i,verticalOffset,LCR_skyImages[pixel]);
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}
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verticalOffset++;
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if (verticalOffset % LCR_SETTING_SKY_SIZE == 0)
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skyLine += LCR_SKY_IMAGE_SIZE / 2;
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}
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#endif
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}
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#endif // guard
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