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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 54 | pj | 1 | |
| 2 | #include <stdlib.h> |
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| 3 | #include <string.h> |
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| 4 | |||
| 5 | #include "timing.h" |
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| 6 | #include "libvga.h" /* for __svgalib_infotable and ramdac inlines */ |
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| 7 | #include "ramdac.h" //SHARK |
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| 8 | #include "accel.h" |
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| 9 | |||
| 10 | |||
| 11 | /* |
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| 12 | * This is a temporary function that allocates and fills in a ModeInfo |
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| 13 | * structure based on a svgalib mode number. |
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| 14 | */ |
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| 15 | |||
| 16 | ModeInfo * |
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| 17 | __svgalib_createModeInfoStructureForSvgalibMode(int mode) |
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| 18 | { |
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| 19 | ModeInfo *modeinfo; |
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| 20 | /* Create the new ModeInfo structure. */ |
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| 21 | modeinfo = malloc(sizeof(ModeInfo)); |
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| 22 | modeinfo->width = __svgalib_infotable[mode].xdim; |
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| 23 | modeinfo->height = __svgalib_infotable[mode].ydim; |
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| 24 | modeinfo->bytesPerPixel = __svgalib_infotable[mode].bytesperpixel; |
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| 25 | switch (__svgalib_infotable[mode].colors) { |
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| 26 | case 16: |
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| 27 | modeinfo->colorBits = 4; |
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| 28 | break; |
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| 29 | case 256: |
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| 30 | modeinfo->colorBits = 8; |
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| 31 | break; |
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| 32 | case 32768: |
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| 33 | modeinfo->colorBits = 15; |
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| 34 | modeinfo->blueOffset = 0; |
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| 35 | modeinfo->greenOffset = 5; |
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| 36 | modeinfo->redOffset = 10; |
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| 37 | modeinfo->blueWeight = 5; |
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| 38 | modeinfo->greenWeight = 5; |
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| 39 | modeinfo->redWeight = 5; |
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| 40 | break; |
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| 41 | case 65536: |
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| 42 | modeinfo->colorBits = 16; |
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| 43 | modeinfo->blueOffset = 0; |
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| 44 | modeinfo->greenOffset = 5; |
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| 45 | modeinfo->redOffset = 11; |
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| 46 | modeinfo->blueWeight = 5; |
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| 47 | modeinfo->greenWeight = 6; |
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| 48 | modeinfo->redWeight = 5; |
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| 49 | break; |
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| 50 | case 256 * 65536: |
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| 51 | modeinfo->colorBits = 24; |
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| 52 | modeinfo->blueOffset = 0; |
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| 53 | modeinfo->greenOffset = 8; |
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| 54 | modeinfo->redOffset = 16; |
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| 55 | modeinfo->blueWeight = 8; |
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| 56 | modeinfo->greenWeight = 8; |
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| 57 | modeinfo->redWeight = 8; |
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| 58 | break; |
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| 59 | } |
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| 60 | modeinfo->bitsPerPixel = modeinfo->bytesPerPixel * 8; |
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| 61 | if (__svgalib_infotable[mode].colors == 16) |
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| 62 | modeinfo->bitsPerPixel = 4; |
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| 63 | modeinfo->lineWidth = __svgalib_infotable[mode].xbytes; |
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| 64 | return modeinfo; |
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| 65 | } |
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| 66 | |||
| 67 | |||
| 68 | /* |
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| 69 | * This function converts a number of significant color bits to a matching |
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| 70 | * DAC mode type as defined in the RAMDAC interface. |
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| 71 | */ |
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| 72 | |||
| 73 | int __svgalib_colorbits_to_colormode(int bpp, int colorbits) |
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| 74 | { |
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| 75 | if (colorbits == 8) |
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| 76 | return CLUT8_6; |
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| 77 | if (colorbits == 15) |
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| 78 | return RGB16_555; |
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| 79 | if (colorbits == 16) |
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| 80 | return RGB16_565; |
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| 81 | if (colorbits == 24) { |
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| 82 | if (bpp == 24) |
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| 83 | return RGB24_888_B; |
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| 84 | else |
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| 85 | return RGB32_888_B; |
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| 86 | } |
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| 87 | return CLUT8_6; |
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| 88 | } |
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| 89 | |||
| 90 | |||
| 91 | /* |
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| 92 | * Clear the accelspecs structure (disable acceleration). |
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| 93 | */ |
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| 94 | |||
| 95 | void __svgalib_clear_accelspecs(AccelSpecs * accelspecs) |
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| 96 | { |
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| 97 | memset(accelspecs, 0, sizeof(AccelSpecs)); |
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| 98 | } |