forked from Lephenixnoir/gint
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
#include <internals/display.h>
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#include <gray.h>
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/*
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grect()
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Draws a rectangle on the screen. This function can use all colors.
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*/
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void grect(int x1, int y1, int x2, int y2, color_t operator)
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{
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if(operator == color_none) return;
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if(adjustRectangle(&x1, &y1, &x2, &y2)) return;
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uint32_t masks[4];
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getMasks(x1, x2, masks);
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uint32_t *lbase = gray_lightVRAM() + (y1 << 2);
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uint32_t *lvideo = gray_lightVRAM() + (y2 << 2) + 4;
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uint32_t *dvideo = gray_darkVRAM() + (y2 << 2) + 4;
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// Doing things in this order will be slower, but man, I can't stand
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// writing that many lines of code for such a simple task. It will be
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// terribly heavy in the binary file...
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while(lvideo > lbase) for(int i = 3; i >= 0; i--) switch(operator)
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{
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case color_white:
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*--lvideo &= ~masks[i];
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*--dvideo &= ~masks[i];
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break;
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case color_light:
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*--lvideo |= masks[i];
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*--dvideo &= ~masks[i];
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break;
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case color_dark:
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*--lvideo &= ~masks[i];
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*--dvideo |= masks[i];
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break;
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case color_black:
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*--lvideo |= masks[i];
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*--dvideo |= masks[i];
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break;
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case color_none: return;
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case color_invert:
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*--lvideo ^= masks[i];
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*--dvideo ^= masks[i];
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break;
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case color_lighten:;
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uint32_t light_1 = *lvideo;
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dvideo--;
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*--lvideo &= *dvideo | ~masks[i];
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*dvideo = (light_1 | ~masks[i]) & (masks[i] ^ *dvideo);
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break;
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case color_lighten2:
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lvideo--;
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*--dvideo &= *lvideo | ~masks[i];
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*lvideo &= ~masks[i];
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break;
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case color_darken:;
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uint32_t light_2 = *lvideo;
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dvideo--;
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*--lvideo |= *dvideo & masks[i];
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*dvideo = (light_2 & masks[i]) | (masks[i] ^ *dvideo);
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break;
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case color_darken2:
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lvideo--;
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*--dvideo |= *lvideo | masks[i];
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*lvideo |= masks[i];
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break;
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}
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}
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