Mercurial > hg > dmlib
annotate src/dmscaledblit.h @ 2298:b5abfff07ca9
Add new DMGrowBuf helper functions dmGrowBufCopyOffsSize() and
dmGrowBufConstCopyOffsSize().
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Thu, 04 Jul 2019 10:54:16 +0300 |
| parents | e06abfde6c39 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * DMLib | |
| 87 | 3 * -- Scaled sprite / surface blitting function template |
| 0 | 4 * Programmed and designed by Matti 'ccr' Hamalainen |
| 863 | 5 * (C) Copyright 2011-2015 Tecnic Software productions (TNSP) |
| 0 | 6 */ |
| 7 | |
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8 |
| 85 | 9 int DM_BLITFUNC_NAME (SDL_Surface *src, |
| 0 | 10 const int x0, const int y0, |
| 11 const int dwidth, const int dheight, | |
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12 SDL_Surface *dst |
| 85 | 13 #ifdef DM_BLITFUNC_ARGS |
| 14 DM_BLITFUNC_ARGS | |
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15 #endif |
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16 ) |
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17 #ifdef DM_HEADER |
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79dac918c81e
Modularize line clipping etc. a lot, and export all line drawing and
Matti Hamalainen <ccr@tnsp.org>
parents:
95
diff
changeset
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18 ; |
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79dac918c81e
Modularize line clipping etc. a lot, and export all line drawing and
Matti Hamalainen <ccr@tnsp.org>
parents:
95
diff
changeset
|
19 #else |
| 0 | 20 { |
| 21 int yc; | |
| 22 DMFixedPoint32 xv, yv, dx, dy; | |
| 23 DMQValue xr, yr; | |
| 24 | |
| 85 | 25 #ifdef DM_BLITFUNC_VARS |
| 26 DM_BLITFUNC_VARS | |
| 0 | 27 #endif |
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Cosmetics pass: Remove excess whitespace.
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28 |
| 0 | 29 // Clip coordinates |
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Matti Hamalainen <ccr@tnsp.org>
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30 if (dmScaledClipCoord(&xr, x0, src->w, dwidth, |
| 0 | 31 dst->clip_rect.x, dst->clip_rect.x + dst->clip_rect.w) |
| 32 || | |
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parents:
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33 dmScaledClipCoord(&yr, y0, src->h, dheight, |
| 0 | 34 dst->clip_rect.y, dst->clip_rect.y + dst->clip_rect.h)) |
| 35 return -1; | |
| 36 | |
| 85 | 37 #ifdef DM_BLITFUNC_INIT |
| 38 DM_BLITFUNC_INIT | |
| 0 | 39 #endif |
| 40 | |
| 41 // Calculate "final" initial source bitmap offsets | |
| 42 FP_CONV(dy, yr.voffs); | |
| 43 FP_MUL_R(yv, dy, yr.vdelta); | |
| 44 | |
| 45 FP_CONV(dx, xr.voffs); | |
| 46 FP_MUL_R(dx, dx, xr.vdelta); | |
| 47 | |
| 48 // Take pitch into account | |
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Add unscaled blitting functions.
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parents:
87
diff
changeset
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49 const int dstadd = xr.vadd - dst->clip_rect.w + dst->clip_rect.x + (dst->pitch / DM_BLITFUNC_DST_BYTES); |
| 0 | 50 |
| 51 // Blit scaled | |
| 85 | 52 DM_BLITFUNC_DST_TYPE * dp = ((DM_BLITFUNC_DST_TYPE *) dst->pixels) + (yr.v0 * dst->pitch) / DM_BLITFUNC_DST_BYTES + xr.v0; |
| 0 | 53 for (yc = yr.v0; yc < yr.v1; yc++) |
| 54 { | |
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55 const DM_BLITFUNC_SRC_TYPE * sp = ((DM_BLITFUNC_SRC_TYPE *) src->pixels) + (FP_GETH16(yv) * src->pitch) / DM_BLITFUNC_SRC_BYTES; |
| 0 | 56 int xc; |
| 57 | |
| 85 | 58 #ifdef DM_BLITFUNC_INNER_INIT |
| 87 | 59 DM_BLITFUNC_INNER_INIT |
| 0 | 60 #endif |
| 61 | |
| 62 for (xv.dw = dx.dw, xc = xr.v0; xc < xr.v1; xc++) | |
| 63 { | |
| 85 | 64 DM_BLITFUNC_INNER |
| 0 | 65 FP_ADD(xv, xr.vdelta); |
| 66 } | |
| 67 FP_ADD(yv, yr.vdelta); | |
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68 dp += dstadd; |
| 0 | 69 } |
| 70 | |
| 85 | 71 #ifdef DM_BLITFUNC_FINISH |
| 72 DM_BLITFUNC_FINISH | |
| 0 | 73 #endif |
| 74 | |
| 75 return 0; | |
| 76 } | |
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232
79dac918c81e
Modularize line clipping etc. a lot, and export all line drawing and
Matti Hamalainen <ccr@tnsp.org>
parents:
95
diff
changeset
|
77 #endif |
| 0 | 78 |
| 85 | 79 #undef DM_BLITFUNC_NAME |
| 80 #undef DM_BLITFUNC_ARGS | |
| 81 #undef DM_BLITFUNC_SRC_BYTES | |
| 82 #undef DM_BLITFUNC_DST_BYTES | |
| 83 #undef DM_BLITFUNC_SRC_TYPE | |
| 84 #undef DM_BLITFUNC_DST_TYPE | |
| 85 #undef DM_BLITFUNC_VARS | |
| 86 #undef DM_BLITFUNC_INIT | |
| 87 #undef DM_BLITFUNC_INNER_INIT | |
| 88 #undef DM_BLITFUNC_INNER | |
| 89 #undef DM_BLITFUNC_FINISH |