49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/*
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* Driver for custom chips display.
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*/
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/* this is a mere collection of data, the registers itself are in the
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custom chip area */
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struct ccfb {
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int disp_width;
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int disp_height;
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int disp_x, disp_y; /* this defines the dimension and
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relative position of the display. */
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int disp_z; /* display depth */
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u_char *fb; /* frame buffer, ie. block in chipmem
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containing bitplane(s) */
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int fb_width;
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int fb_height; /* dimension of the framebuffer. Can
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be larger than the display! */
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int fb_x, fb_y; /* offset of the framebuffer relative
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to the display (disp_*) values */
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int fb_z; /* frame buffer depth */
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u_short col[16]; /* color palette */
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u_short bplstart_off; /* offset in copperlist where the bitplane
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start is set. This is used for smooth
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scrolling of oversized framebuffers */
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u_short *cop1, *cop2; /* both copperlists */
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};
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/* these are the initial values for changeable parameters: */
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#define DEF_DISP_WIDTH 640
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#define DEF_DISP_HEIGHT 400
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#define DEF_DISP_X 258 /* "" */
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#define DEF_DISP_Y 88 /* hardware preferred values.. */
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#define DEF_FB_X 0
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#define DEF_FB_Y 0
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#define DEF_COL0 0x123
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#define DEF_COL1 0xccc
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/* these are currently not changeable easily (would require reallocation
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of display memory and rebuild of copperlists. Do this later perhaps) */
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#define DEF_FB_WIDTH 1024
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#define DEF_FB_HEIGHT 1024
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#define DEF_FB_Z 1
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#define DEF_DISP_Z 1
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