src/mesa/drivers/dri/nouveau/nouveau_util.h

   1 /*
   2  * Copyright (C) 2009 Francisco Jerez.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #ifndef __NOUVEAU_UTIL_H__
  28 #define __NOUVEAU_UTIL_H__
  29
  30 #include "main/formats.h"
  31 #include "main/colormac.h"
  32
  33 static inline unsigned
  34 pack_rgba_i(gl_format f, uint8_t c[])
  35 {
  36         switch (f) {
  37         case MESA_FORMAT_ARGB8888:
  38                 return PACK_COLOR_8888(c[ACOMP], c[RCOMP], c[GCOMP], c[BCOMP]);
  39         case MESA_FORMAT_ARGB8888_REV:
  40                 return PACK_COLOR_8888(c[BCOMP], c[GCOMP], c[RCOMP], c[ACOMP]);
  41         case MESA_FORMAT_XRGB8888:
  42                 return PACK_COLOR_8888(0, c[RCOMP], c[GCOMP], c[BCOMP]);
  43         case MESA_FORMAT_XRGB8888_REV:
  44                 return PACK_COLOR_8888(c[BCOMP], c[GCOMP], c[RCOMP], 0);
  45         case MESA_FORMAT_RGBA8888:
  46                 return PACK_COLOR_8888(c[RCOMP], c[GCOMP], c[BCOMP], c[ACOMP]);
  47         case MESA_FORMAT_RGBA8888_REV:
  48                 return PACK_COLOR_8888(c[ACOMP], c[BCOMP], c[GCOMP], c[RCOMP]);
  49         case MESA_FORMAT_RGB565:
  50                 return PACK_COLOR_565(c[RCOMP], c[GCOMP], c[BCOMP]);
  51         default:
  52                 assert(0);
  53         }
  54 }
  55
  56 static inline unsigned
  57 pack_zs_i(gl_format f, uint32_t z, uint8_t s)
  58 {
  59         switch (f) {
  60         case MESA_FORMAT_Z24_S8:
  61                 return (z & 0xffffff00) | (s & 0xff);
  62         case MESA_FORMAT_Z24_X8:
  63                 return (z & 0xffffff00);
  64         case MESA_FORMAT_Z16:
  65                 return (z & 0xffff0000) >> 16;
  66         default:
  67                 assert(0);
  68         }
  69 }
  70
  71 static inline unsigned
  72 pack_rgba_f(gl_format f, float c[])
  73 {
  74         return pack_rgba_i(f, (uint8_t []) {
  75                            FLOAT_TO_UBYTE(c[RCOMP]),
  76                            FLOAT_TO_UBYTE(c[GCOMP]),
  77                            FLOAT_TO_UBYTE(c[BCOMP]),
  78                            FLOAT_TO_UBYTE(c[ACOMP]) });
  79 }
  80
  81 static inline unsigned
  82 pack_zs_f(gl_format f, float z, uint8_t s)
  83 {
  84         return pack_zs_i(f, FLOAT_TO_UINT(z), s);
  85 }
  86
  87 /* Integer base-2 logarithm, rounded towards zero. */
  88 static inline unsigned
  89 log2i(unsigned i)
  90 {
  91         unsigned r = 0;
  92
  93         if (i & 0xffff0000) {
  94                 i >>= 16;
  95                 r += 16;
  96         }
  97         if (i & 0x0000ff00) {
  98                 i >>= 8;
  99                 r += 8;
 100         }
 101         if (i & 0x000000f0) {
 102                 i >>= 4;
 103                 r += 4;
 104         }
 105         if (i & 0x0000000c) {
 106                 i >>= 2;
 107                 r += 2;
 108         }
 109         if (i & 0x00000002) {
 110                 r += 1;
 111         }
 112         return r;
 113 }
 114
 115 static inline unsigned
 116 align(unsigned x, unsigned m)
 117 {
 118         return (x + m - 1) & ~(m - 1);
 119 }
 120
 121 static inline void
 122 get_scissors(struct gl_framebuffer *fb, int *x, int *y, int *w, int *h)
 123 {
 124         *w = fb->_Xmax - fb->_Xmin;
 125         *h = fb->_Ymax - fb->_Ymin;
 126         *x = fb->_Xmin;
 127         *y = (fb->Name ? fb->_Ymin :
 128               /* Window system FBO: Flip the Y coordinate. */
 129               fb->Height - fb->_Ymax);
 130 }
 131
 132 static inline void
 133 get_viewport_scale(GLcontext *ctx, float a[16])
 134 {
 135         struct gl_viewport_attrib *vp = &ctx->Viewport;
 136         struct gl_framebuffer *fb = ctx->DrawBuffer;
 137
 138         a[MAT_SX] = (float)vp->Width / 2;
 139
 140         if (fb->Name)
 141                 a[MAT_SY] = (float)vp->Height / 2;
 142         else
 143                 /* Window system FBO: Flip the Y coordinate. */
 144                 a[MAT_SY] = - (float)vp->Height / 2;
 145
 146         a[MAT_SZ] = fb->_DepthMaxF * (vp->Far - vp->Near) / 2;
 147 }
 148
 149 static inline void
 150 get_viewport_translate(GLcontext *ctx, float a[4])
 151 {
 152         struct gl_viewport_attrib *vp = &ctx->Viewport;
 153         struct gl_framebuffer *fb = ctx->DrawBuffer;
 154
 155         a[0] = (float)vp->Width / 2 + vp->X;
 156
 157         if (fb->Name)
 158                 a[1] = (float)vp->Height / 2 + vp->Y;
 159         else
 160                 /* Window system FBO: Flip the Y coordinate. */
 161                 a[1] = fb->Height - (float)vp->Height / 2 - vp->Y;
 162
 163         a[2] = fb->_DepthMaxF * (vp->Far + vp->Near) / 2;
 164 }
 165
 166 static inline void
 167 OUT_RINGm(struct nouveau_channel *chan, float m[16])
 168 {
 169         int i, j;
 170
 171         for (i = 0; i < 4; i++)
 172                 for (j = 0; j < 4; j++)
 173                         OUT_RINGf(chan, m[4*j + i]);
 174 }
 175
 176 static inline GLboolean
 177 is_color_operand(int op)
 178 {
 179         return op == GL_SRC_COLOR || op == GL_ONE_MINUS_SRC_COLOR;
 180 }
 181
 182 static inline GLboolean
 183 is_negative_operand(int op)
 184 {
 185         return op == GL_ONE_MINUS_SRC_COLOR || op == GL_ONE_MINUS_SRC_ALPHA;
 186 }
 187
 188 static inline GLboolean
 189 is_texture_source(int s)
 190 {
 191         return s == GL_TEXTURE || (s >= GL_TEXTURE0 && s <= GL_TEXTURE31);
 192 }
 193
 194 static inline struct gl_texgen *
 195 get_texgen_coord(struct gl_texture_unit *u, int i)
 196 {
 197         return ((struct gl_texgen *[])
 198                 { &u->GenS, &u->GenT, &u->GenR, &u->GenQ }) [i];
 199 }
 200
 201 static inline float *
 202 get_texgen_coeff(struct gl_texgen *c)
 203 {
 204         if (c->Mode == GL_OBJECT_LINEAR)
 205                 return c->ObjectPlane;
 206         else if (c->Mode == GL_EYE_LINEAR)
 207                 return c->EyePlane;
 208         else
 209                 return NULL;
 210 }
 211
 212 #endif