Mercurial > hg > dmlib
annotate dmlib.h @ 265:51ba74f7668c
Make line clipping floating point only.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Wed, 10 Oct 2012 13:28:31 +0300 |
| parents | 9d015d32841a |
| children | e2f286781180 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * DMLib | |
| 3 * -- Main header file | |
| 4 * Programmed and designed by Matti 'ccr' Hamalainen | |
| 5 * (C) Copyright 2011 Tecnic Software productions (TNSP) | |
| 6 */ | |
| 7 #ifndef DMLIB_H | |
| 8 #define DMLIB_H | |
| 9 | |
| 10 #include <SDL.h> | |
| 11 #include <stdarg.h> | |
| 12 | |
| 13 #ifdef DM_USE_ASSERTS | |
| 14 #include <assert.h> | |
| 15 #else | |
| 16 #define assert(NEXPR) // stub | |
| 17 #endif | |
| 18 | |
| 19 #ifdef __cplusplus | |
| 20 extern "C" { | |
| 21 #endif | |
| 22 | |
| 23 // Defaults | |
| 24 //#define DM_PROG_AUTHOR "By Matti 'ccr' Hmlinen (C) Copyright 2012 TNSP" | |
| 25 //#define DM_PROG_LICENSE "This software is licensed under GNU GPL version 2" | |
| 26 | |
| 27 #define DM_PROG_AUTHOR "" | |
| 28 #define DM_PROG_LICENSE "" | |
| 29 | |
| 30 /* Error codes | |
| 31 */ | |
| 32 enum { | |
| 33 // General error codes | |
| 34 DMERR_OK = 0, | |
|
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35 DMERR_PROGRESS, // Status OK, but operation in progress |
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36 |
| 0 | 37 DMERR_FOPEN, |
| 38 DMERR_FREAD, | |
| 39 DMERR_FWRITE, | |
| 40 DMERR_FSEEK, | |
|
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41 DMERR_NOT_FOUND, // Resource/data not found |
| 0 | 42 |
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43 DMERR_INVALID_DATA, // Some data was invalid |
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44 DMERR_MALLOC, // Memory allocation failure |
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45 DMERR_ALREADY_INIT, // Resource has already been initialized |
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46 DMERR_INIT_FAIL, // General initialization failure |
| 0 | 47 DMERR_INVALID_ARGS, |
| 48 | |
|
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49 DMERR_NULLPTR, // NULL pointer specified in critical argument |
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50 DMERR_NOT_SUPPORTED,// Operation not supported |
| 0 | 51 DMERR_OUT_OF_DATA, |
| 52 DMERR_EXTRA_DATA, | |
| 53 DMERR_BOUNDS, | |
| 54 | |
| 55 // PACK-file subsystem | |
| 56 DMERR_NOTPACK, | |
| 57 DMERR_VERSION, | |
| 58 DMERR_INVALID, | |
| 59 DMERR_COMPRESSION, | |
| 60 }; | |
| 61 | |
| 62 | |
| 63 // Resource management defines | |
| 64 #define DMRES_NAME_LEN 32 | |
| 65 #define DMRES_DATA_PACK "data.pak" // Name of the data-file | |
| 66 #define DMRES_DATA_PATH "DATA/" // Sub-directory path | |
| 67 #define DMRES_RES_FILE "res.txt" // Resource data file | |
| 68 | |
| 69 | |
| 70 // Mutexes | |
| 71 #define DMMutex SDL_mutex | |
| 72 #define dmCreateMutex() SDL_CreateMutex() | |
| 73 #define dmDestroyMutex(x) SDL_DestroyMutex(x) | |
| 74 #define dmMutexLock(x) SDL_mutexP(x) | |
| 75 #define dmMutexUnlock(x) SDL_mutexV(x) | |
| 76 | |
| 77 | |
| 78 /* Define a boolean type | |
| 79 */ | |
| 80 #if !defined(FALSE) && !defined(TRUE) && !defined(BOOL) | |
| 81 typedef enum { FALSE = 0, TRUE = 1 } BOOL; | |
| 82 #endif | |
| 83 | |
| 84 #ifndef BOOL | |
| 85 #ifdef bool | |
| 86 #define BOOL bool | |
| 87 #else | |
| 88 #define BOOL int | |
| 89 #endif | |
| 90 #endif | |
| 91 | |
| 92 | |
| 93 /* Fixed point math type | |
| 94 */ | |
| 95 typedef union | |
| 96 { | |
|
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97 Sint64 dw; |
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98 Sint32 w[2]; |
| 0 | 99 } DMFixedPoint; |
| 100 | |
| 101 | |
| 102 typedef union | |
| 103 { | |
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104 Sint32 dw; |
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105 Sint16 w[2]; |
| 0 | 106 } DMFixedPoint32; |
| 107 | |
| 108 | |
| 109 /* Macros for fixed point math | |
| 110 */ | |
| 111 #if __GNUC__ >= 3 | |
| 112 # define FP_SET(a, k) a.dw = k ## ULL | |
| 113 #else | |
| 114 # define FP_SET(a, k) a.dw = k | |
| 115 #endif | |
| 116 | |
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117 #define FP_CONV(a, k) a.dw = (k) |
| 0 | 118 |
| 119 #ifndef SDL_BYTEORDER | |
| 120 # error Undefined byteorder! | |
| 121 #endif | |
| 122 | |
| 123 #if (SDL_BYTEORDER == SDL_BIG_ENDIAN) | |
| 124 # define FP_SETH(a, k) a.w[0] = (k) | |
| 125 # define FP_SETL(a, k) a.w[1] = (k) | |
| 126 # define FP_SETHL(a, h, l) { a.w[0] = (h); a.w[1] = (l); } | |
| 127 # define FP_GETH(a) a.w[0] | |
| 128 # define FP_GETL(a) a.w[1] | |
| 129 #elif (SDL_BYTEORDER == SDL_LIL_ENDIAN) | |
| 130 # define FP_SETH(a, k) a.w[1] = (k) | |
| 131 # define FP_SETL(a, k) a.w[0] = (k) | |
| 132 # define FP_SETHL(a, h, l) { a.w[1] = (h); a.w[0] = (l); } | |
| 133 # define FP_GETH(a) a.w[1] | |
| 134 # define FP_GETL(a) a.w[0] | |
| 135 #else | |
| 136 # error Unsupported byte order! | |
| 137 #endif | |
| 138 | |
| 139 #define FP_PRINTF(a) printf("%.8x:%.8x", FP_GETH(a), FP_GETL(a)) | |
| 140 #define FP_PRINTF32(a) printf("%.4x:%.4x", FP_GETH(a), FP_GETL(a)) | |
| 141 | |
| 142 #define FP_ADD(a, b) a.dw += b.dw | |
| 143 #define FP_SUB(a, b) a.dw -= b.dw | |
| 144 #define FP_ADD_R(r, a, b) r.dw = a.dw + b.dw | |
| 145 #define FP_SUB_R(r, a, b) r.dw = a.dw - b.dw | |
| 146 #define FP_DIV(a, b) a.dw /= b.dw | |
| 147 #define FP_MUL(a, b) a.dw *= b.dw | |
| 148 #define FP_DIV_R(r, a, b) r.dw = (a.dw / b.dw) | |
| 149 #define FP_MUL_R(r, a, b) r.dw = (a.dw * b.dw) | |
| 150 | |
| 151 | |
| 152 /* Miscellaneous types | |
| 153 */ | |
| 154 typedef struct | |
| 155 { | |
| 156 #if (SDL_BYTEORDER == SDL_BIG_ENDIAN) | |
| 157 Uint8 a,g,b,r; | |
| 158 #elif (SDL_BYTEORDER == SDL_LIL_ENDIAN) | |
| 159 Uint8 r,g,b,a; | |
| 160 #endif | |
| 161 } DMRGBA32; | |
| 162 | |
| 163 | |
| 164 typedef float DMFloat; | |
| 165 | |
| 166 | |
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167 // Macro for swapping two lvalues of same type |
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168 #define DM_SWAP(T, A, B) { if ((B) < (A)) { T swtmp = (B); B = (A); A = swtmp; } } |
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169 |
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170 |
| 0 | 171 /* Drawing modes used by blitting and some other functions. |
| 172 */ | |
| 173 enum | |
| 174 { | |
| 175 DMD_NONE = 0x0000, | |
| 176 DMD_TRANSPARENT = 0x0001, | |
| 177 DMD_SATURATE = 0x0002, | |
| 178 | |
| 179 DMD_ANTIALIAS = 0x0004, | |
| 180 | |
| 181 DMD_NMODES = 6 | |
| 182 }; | |
| 183 | |
| 184 | |
| 185 // Available bitdepths. Not all functions may support every one of these. | |
| 186 enum | |
| 187 { | |
| 188 DMD_8BIT = 0, | |
| 189 DMD_32BIT, | |
| 190 | |
| 191 DMD_NBITDEPTHS | |
| 192 }; | |
| 193 | |
| 194 | |
| 195 static inline int dmBitsPerPixel2Index(int bpp) | |
| 196 { | |
| 197 return (bpp == 8 ? 0 : (bpp == 32 ? 1 : -1)); | |
| 198 } | |
| 199 | |
| 200 | |
| 201 /* Generic parameter interpolation | |
| 202 */ | |
| 203 #define DMM_S_CURVE(t) ((t) * (t) * (3.0f - 2.0f * (t))) | |
| 204 #define DMM_LERP(t, a, b) ((a) + (t) * ((b) - (a))) | |
| 205 | |
| 206 typedef struct | |
| 207 { | |
| 208 DMFloat start, end, nsteps; | |
| 209 } DMLerpContext; | |
| 210 | |
| 211 | |
| 212 void dmLerpInit(DMLerpContext *ctx, DMFloat start, DMFloat end, DMFloat nsteps); | |
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213 DMFloat dmCatmullRom(const DMFloat t, const DMFloat p0, const DMFloat p1, const DMFloat p2, const DMFloat p3); |
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214 |
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215 |
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216 static inline DMFloat dmClamp10(const DMFloat a) |
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217 { |
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218 return (a < 0.0f ? 0.0f : (a > 1.0f ? 1.0f : a)); |
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219 } |
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220 |
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221 |
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222 static inline int dmClamp(const int v, const int min, const int max) |
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223 { |
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224 return (v < min ? min : (v > max ? max : v)); |
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225 } |
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226 |
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227 |
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228 static inline DMFloat dmLerpSCurve(DMLerpContext *ctx, const DMFloat step) |
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229 { |
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230 const DMFloat n = step / ctx->nsteps; |
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231 const DMFloat v = DMM_S_CURVE(n); |
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232 return DMM_LERP(v, ctx->start, ctx->end); |
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233 } |
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234 |
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235 |
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236 static inline DMFloat dmLerpSCurveClamp(DMLerpContext *ctx, const DMFloat step) |
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237 { |
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238 const DMFloat n = dmClamp10(step / ctx->nsteps); |
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239 const DMFloat v = DMM_S_CURVE(n); |
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240 return DMM_LERP(v, ctx->start, ctx->end); |
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241 } |
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242 |
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243 |
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244 static inline DMFloat dmLerp1(DMLerpContext *ctx, const DMFloat step) |
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245 { |
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246 const DMFloat v = step / ctx->nsteps; |
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247 return DMM_LERP(v, ctx->start, ctx->end); |
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248 } |
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249 |
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250 |
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251 static inline DMFloat dmLerp1Clamp(DMLerpContext *ctx, const DMFloat step) |
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252 { |
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253 const DMFloat v = dmClamp10(step / ctx->nsteps); |
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254 return DMM_LERP(v, ctx->start, ctx->end); |
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255 } |
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256 |
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257 |
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258 static inline DMFloat dmCatmullRomClamp(const DMFloat t, const DMFloat p0, const DMFloat p1, const DMFloat p2, const DMFloat p3) |
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259 { |
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260 return dmCatmullRom(dmClamp10(t), p0, p1, p2, p3); |
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261 } |
| 0 | 262 |
| 263 | |
| 264 /* Perlin noise | |
| 265 */ | |
| 266 void dmPerlinInit(void); | |
| 267 DMFloat dmPerlinNoise2D(DMFloat x, DMFloat y, DMFloat alpha, DMFloat beta, int n); | |
| 268 | |
| 269 | |
| 270 /* Arbitrary line drawing | |
| 271 */ | |
| 272 #ifdef DM_GFX_LINES | |
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273 #define DM_HEADER |
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274 #include "dmlinefunc.h" |
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275 |
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276 enum |
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277 { |
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278 CLIP_TOP = 1, |
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279 CLIP_BOTTOM = 2, |
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280 CLIP_RIGHT = 4, |
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281 CLIP_LEFT = 8 |
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282 }; |
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283 |
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284 #define DM_CLIP_FUNC dmClipLineCoordsFloat |
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285 #define DM_COORD_TYPE DMFloat |
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286 #include "dmlineclip.h" |
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287 |
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288 #undef DM_HEADER |
| 0 | 289 #endif |
| 290 | |
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291 |
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292 /* Various blitting functions |
| 0 | 293 */ |
| 294 #ifdef DM_GFX_BLITS | |
| 295 typedef int (*DMScaledBlitFunc)(SDL_Surface *src, const int x0, const int y0, const int dwidth, const int dheight, SDL_Surface *dst); | |
| 296 DMScaledBlitFunc dmGetScaledBlitFunc(SDL_PixelFormat *src, SDL_PixelFormat *dst, int mode); | |
| 297 int dmScaledBlitSurfaceAny(SDL_Surface *src, const int x0, const int y0, const int dwidth, const int dheight, SDL_Surface *dst, int mode); | |
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298 |
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299 typedef int (*DMUnscaledBlitFunc)(SDL_Surface *src, const int x0, const int y0, SDL_Surface *dst); |
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300 DMUnscaledBlitFunc dmGetUnscaledBlitFunc(SDL_PixelFormat *src, SDL_PixelFormat *dst, int mode); |
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301 int dmUnscaledBlitSurfaceAny(SDL_Surface *src, const int x0, const int y0, SDL_Surface *dst, int mode); |
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302 |
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303 #define DM_HEADER |
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304 #include "dmblitfunc.h" |
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305 #undef DM_HEADER |
| 0 | 306 #endif |
| 307 | |
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308 |
| 0 | 309 /* Misc functions |
| 310 */ | |
| 311 #ifdef DM_GFX_MISC | |
| 312 void dmFillRect(SDL_Surface *screen, int x0, int y0, int x1, int y1, const Uint32 col); | |
| 313 void dmDrawHLine(SDL_Surface *screen, int x0, int x1, int yc, const Uint32 col); | |
| 314 void dmDrawVLine(SDL_Surface *screen, int y0, int y1, int xc, const Uint32 col); | |
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150
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315 |
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316 void dmDrawBox3D(SDL_Surface *screen, int x0, int y0, int x1, int y1, Uint32 ucol, Uint32 dcol); |
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317 void dmFillBox3D(SDL_Surface *screen, int x0, int y0, int x1, int y1, Uint32 bgcol, Uint32 ucol, Uint32 dcol); |
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318 |
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319 |
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320 static inline void dmClearSurface(SDL_Surface *screen, const Uint32 col) |
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321 { |
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322 SDL_FillRect(screen, NULL, col); |
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323 } |
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324 |
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325 |
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326 static inline Uint32 dmMapRGB(SDL_Surface *screen, int r, int g, int b) |
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327 { |
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328 return SDL_MapRGB(screen->format, r, g, b); |
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329 } |
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330 |
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331 |
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332 static inline Uint32 dmMapRGBA(SDL_Surface *screen, int r, int g, int b, int a) |
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333 { |
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334 return SDL_MapRGBA(screen->format, r, g, b, a); |
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335 } |
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336 |
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337 |
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338 static inline int dmDirectBlitSurface(SDL_Surface *bmp, SDL_Surface *screen) |
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339 { |
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340 return SDL_BlitSurface(bmp, NULL, screen, NULL); |
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341 } |
| 0 | 342 #endif |
| 343 | |
| 344 | |
| 345 /* Global variables | |
| 346 */ | |
| 347 extern char *dmProgName, | |
| 348 *dmProgDesc, | |
| 349 *dmProgVersion, | |
| 350 *dmProgAuthor, | |
| 351 *dmProgLicense; | |
| 352 | |
| 353 extern int dmVerbosity; | |
| 354 void dmInitProg(char *name, char *desc, char *version, char *author, char *license); | |
| 355 void dmPrintBanner(FILE *outFile, const char *name, const char *usage); | |
| 356 | |
| 357 void dmMsgVA(int level, const char *fmt, va_list ap); | |
| 358 void dmMsg(int level, const char *fmt, ...); | |
| 359 void dmPrintVA(int level, const char *fmt, va_list ap); | |
| 360 void dmPrint(int level, const char *fmt, ...); | |
| 361 void dmErrorVA(const char *fmt, va_list); | |
| 362 void dmError(const char *fmt, ...); | |
| 363 | |
| 364 void * dmMalloc(size_t); | |
| 365 void * dmMalloc0(size_t); | |
| 366 void * dmRealloc(void *, size_t); | |
| 367 void * dmCalloc(size_t, size_t); | |
| 368 void dmFree(void *); | |
| 369 | |
| 370 BOOL dmGetIntVal(const char *s, int *i); | |
| 371 | |
| 372 int dmGetErrno(); | |
| 373 const char *dmErrorStr(int error); | |
| 374 | |
| 375 char * dm_strdup(const char *); | |
| 376 char * dm_strdup_vprintf(const char *, va_list); | |
| 377 char * dm_strdup_printf(const char *, ...); | |
| 378 | |
| 379 | |
| 380 /* Endianess swapping macros | |
| 381 */ | |
| 382 #define DM_SWAP_16_LE_BE(value) ((Uint16) ( \ | |
| 383 (Uint16) ((Uint16) (value) >> 8) | \ | |
| 384 (Uint16) ((Uint16) (value) << 8)) ) | |
| 385 | |
| 386 | |
| 387 #define DM_SWAP_32_LE_BE(value) ((Uint32) ( \ | |
| 388 (((Uint32) (value) & (Uint32) 0x000000ffU) << 24) | \ | |
| 389 (((Uint32) (value) & (Uint32) 0x0000ff00U) << 8) | \ | |
| 390 (((Uint32) (value) & (Uint32) 0x00ff0000U) >> 8) | \ | |
| 391 (((Uint32) (value) & (Uint32) 0xff000000U) >> 24))) | |
| 392 | |
| 393 #ifdef DM_HAVE_64BIT | |
| 394 #define DM_SWAP_64_LE_BE(value) ((Uint64) ( \ | |
| 395 (((Uint64) (value) & (Uint64) 0x00000000000000ffULL) << 56) | \ | |
| 396 (((Uint64) (value) & (Uint64) 0x000000000000ff00ULL) << 40) | \ | |
| 397 (((Uint64) (value) & (Uint64) 0x0000000000ff0000ULL) << 24) | \ | |
| 398 (((Uint64) (value) & (Uint64) 0x00000000ff000000ULL) << 8) | \ | |
| 399 (((Uint64) (value) & (Uint64) 0x000000ff00000000ULL) >> 8) | \ | |
| 400 (((Uint64) (value) & (Uint64) 0x0000ff0000000000ULL) >> 24) | \ | |
| 401 (((Uint64) (value) & (Uint64) 0x00ff000000000000ULL) >> 40) | \ | |
| 402 (((Uint64) (value) & (Uint64) 0xff00000000000000ULL) >> 56))) | |
| 403 #endif | |
| 404 | |
| 405 /* Macros that swap only when needed ... | |
| 406 */ | |
| 407 #if (SDL_BYTEORDER == SDL_BIG_ENDIAN) | |
| 408 # define DM_LE16_TO_NATIVE(value) DM_SWAP_16_LE_BE(value) | |
| 409 # define DM_LE32_TO_NATIVE(value) DM_SWAP_32_LE_BE(value) | |
| 410 # define DM_NATIVE_TO_LE16(value) DM_SWAP_16_LE_BE(value) | |
| 411 # define DM_NATIVE_TO_LE32(value) DM_SWAP_32_LE_BE(value) | |
| 412 | |
| 413 # define DM_BE16_TO_NATIVE(value) ((Uint16) (value)) | |
| 414 # define DM_BE32_TO_NATIVE(value) ((Uint32) (value)) | |
| 415 # define DM_NATIVE_TO_BE16(value) ((Uint16) (value)) | |
| 416 # define DM_NATIVE_TO_BE32(value) ((Uint32) (value)) | |
| 417 | |
| 418 # ifdef DM_HAVE_64BIT | |
| 419 # define DM_LE64_TO_NATIVE(value) DM_SWAP_64_LE_BE(value) | |
| 420 # define DM_NATIVE_TO_LE64(value) DM_SWAP_64_LE_BE(value) | |
| 421 # define DM_BE64_TO_NATIVE(value) ((Uint64) (value)) | |
| 422 # define DM_NATIVE_TO_BE64(value) ((Uint64) (value)) | |
| 423 # endif | |
| 424 | |
| 425 #elif (SDL_BYTEORDER == SDL_LIL_ENDIAN) | |
| 426 | |
| 427 # define DM_LE16_TO_NATIVE(value) ((Uint16) (value)) | |
| 428 # define DM_LE32_TO_NATIVE(value) ((Uint32) (value)) | |
| 429 # define DM_NATIVE_TO_LE16(value) ((Uint16) (value)) | |
| 430 # define DM_NATIVE_TO_LE32(value) ((Uint32) (value)) | |
| 431 | |
| 432 # define DM_BE16_TO_NATIVE(value) DM_SWAP_16_LE_BE(value) | |
| 433 # define DM_BE32_TO_NATIVE(value) DM_SWAP_32_LE_BE(value) | |
| 434 # define DM_NATIVE_TO_BE16(value) DM_SWAP_16_LE_BE(value) | |
| 435 # define DM_NATIVE_TO_BE32(value) DM_SWAP_32_LE_BE(value) | |
| 436 | |
| 437 # ifdef DM_HAVE_64BIT | |
| 438 # define DM_LE64_TO_NATIVE(value) ((Uint64) (value)) | |
| 439 # define DM_NATIVE_TO_LE64(value) ((Uint64) (value)) | |
| 440 # define DM_BE64_TO_NATIVE(value) DM_SWAP_64_LE_BE(value) | |
| 441 # define DM_NATIVE_TO_BE64(value) DM_SWAP_64_LE_BE(value) | |
| 442 # endif | |
| 443 #endif | |
| 444 | |
| 445 | |
| 446 #ifdef __cplusplus | |
| 447 } | |
| 448 #endif | |
| 449 #endif // DMLIB_H |