58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
#include <internals/bopti.h>
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#include <internals/display.h>
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#include <gray.h>
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/*
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gimage()
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Displays a gray image in the video ram.
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*/
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void gimage(int x, int y, struct Image *img)
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{
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if(!img || img->magic != 0xb7) return;
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struct Structure s;
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struct Command command;
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int actual_width;
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int format = img->format, i = 0;
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getStructure(img, &s);
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//---
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// Adjusting image parameters.
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//---
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if(x + s.width <= 0 || x > 127 || y + s.height <= 0 || y > 63) return;
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command.top = (y < 0) ? (-y) : (0);
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command.bottom = (y + s.height > 64) ? (64 - y) : (s.height);
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command.left = ((x < 0) ? (-x) : (0)) >> 5;
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actual_width = (x + s.width > 128) ? (128 - x) : (s.width);
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command.right = ((actual_width + 31) >> 5) - 1;
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command.op = bopti_op_gray;
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if(x >= 0) getMasks(x, x + actual_width - 1, command.masks);
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else getMasks(0, actual_width + x - 1, command.masks);
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bopti_v1 = gray_lightVRAM();
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bopti_v2 = gray_darkVRAM();
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while(format)
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{
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// Drawing every layer, in order of formats.
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if(format & 1)
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{
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// These members are modified by bopti()!
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command.x = x;
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command.y = y;
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command.channel = (1 << i);
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bopti(s.data, &s, &command);
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s.data += s.layer_size;
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}
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format >>= 1;
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i++;
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}
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}
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