Mercurial > hg > dmlib
annotate dmscaledblit.h @ 60:f28cd66356f6
Initial work for bitmapped fonts and text drawing. Also moved TTF header
stuff to dmtext.h.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Mon, 01 Oct 2012 09:46:56 +0300 |
| parents | d9251dd496ce |
| children | c257d73cf790 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * DMLib | |
| 3 * -- Sprite / surface blitting function template | |
| 4 * Programmed and designed by Matti 'ccr' Hamalainen | |
| 5 * (C) Copyright 2011-2012 Tecnic Software productions (TNSP) | |
| 6 */ | |
| 7 | |
| 8 int DM_SCALED_NAME (SDL_Surface *src, | |
| 9 const int x0, const int y0, | |
| 10 const int dwidth, const int dheight, | |
|
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d9251dd496ce
Add new scaled blit template parameters in order to implement global alpha.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
11 SDL_Surface *dst |
|
d9251dd496ce
Add new scaled blit template parameters in order to implement global alpha.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
12 #ifdef DM_SCALED_ARGS |
|
d9251dd496ce
Add new scaled blit template parameters in order to implement global alpha.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
13 DM_SCALED_ARGS |
|
d9251dd496ce
Add new scaled blit template parameters in order to implement global alpha.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
14 #endif |
|
d9251dd496ce
Add new scaled blit template parameters in order to implement global alpha.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
15 ) |
| 0 | 16 { |
| 17 int yc; | |
| 18 DMFixedPoint32 xv, yv, dx, dy; | |
| 19 DMQValue xr, yr; | |
| 20 | |
| 21 #ifdef DM_SCALED_VARS | |
| 22 DM_SCALED_VARS | |
| 23 #endif | |
| 24 | |
| 25 // Clip coordinates | |
| 26 if (dmClipCoord(&xr, x0, src->w, dwidth, | |
| 27 dst->clip_rect.x, dst->clip_rect.x + dst->clip_rect.w) | |
| 28 || | |
| 29 dmClipCoord(&yr, y0, src->h, dheight, | |
| 30 dst->clip_rect.y, dst->clip_rect.y + dst->clip_rect.h)) | |
| 31 return -1; | |
| 32 | |
| 33 #ifdef DM_SCALED_INIT | |
| 34 DM_SCALED_INIT | |
| 35 #endif | |
| 36 | |
| 37 // Calculate "final" initial source bitmap offsets | |
| 38 FP_CONV(dy, yr.voffs); | |
| 39 FP_MUL_R(yv, dy, yr.vdelta); | |
| 40 | |
| 41 FP_CONV(dx, xr.voffs); | |
| 42 FP_MUL_R(dx, dx, xr.vdelta); | |
| 43 | |
| 44 // Take pitch into account | |
| 45 const int xadd = xr.vadd - dst->clip_rect.w + dst->clip_rect.x + (dst->pitch / DM_SCALED_DST_BYTES); | |
| 46 | |
| 47 // Blit scaled | |
| 48 DM_SCALED_DST_TYPE * dp = ((DM_SCALED_DST_TYPE *) dst->pixels) + (yr.v0 * dst->pitch) / DM_SCALED_DST_BYTES + xr.v0; | |
| 49 for (yc = yr.v0; yc < yr.v1; yc++) | |
| 50 { | |
| 51 const DM_SCALED_SRC_TYPE * sp = ((DM_SCALED_SRC_TYPE *) src->pixels) + (FP_GETH(yv) * src->pitch) / DM_SCALED_SRC_BYTES; | |
| 52 int xc; | |
| 53 | |
| 54 #ifdef DM_SCALED_INNER_INIT | |
| 55 DM_SCALED_INNER_INIT | |
| 56 #endif | |
| 57 | |
| 58 for (xv.dw = dx.dw, xc = xr.v0; xc < xr.v1; xc++) | |
| 59 { | |
| 60 DM_SCALED_INNER | |
| 61 FP_ADD(xv, xr.vdelta); | |
| 62 } | |
| 63 FP_ADD(yv, yr.vdelta); | |
| 64 dp += xadd; | |
| 65 } | |
| 66 | |
| 67 #ifdef DM_SCALED_FINISH | |
| 68 DM_SCALED_FINISH | |
| 69 #endif | |
| 70 | |
| 71 return 0; | |
| 72 } | |
| 73 | |
| 74 | |
| 75 #undef DM_SCALED_NAME | |
|
16
d9251dd496ce
Add new scaled blit template parameters in order to implement global alpha.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
76 #undef DM_SCALED_ARGS |
| 0 | 77 #undef DM_SCALED_SRC_BYTES |
| 78 #undef DM_SCALED_DST_BYTES | |
| 79 #undef DM_SCALED_SRC_TYPE | |
| 80 #undef DM_SCALED_DST_TYPE | |
| 81 #undef DM_SCALED_VARS | |
| 82 #undef DM_SCALED_INIT | |
| 83 #undef DM_SCALED_INNER_INIT | |
| 84 #undef DM_SCALED_INNER | |
| 85 #undef DM_SCALED_FINISH |