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/*
* Copyright (C) 2009 Francisco Jerez.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef __NOUVEAU_UTIL_H__
#define __NOUVEAU_UTIL_H__
#include "main/formats.h"
#include "main/colormac.h"
static inline unsigned
pack_rgba_i(gl_format f, uint8_t c[])
{
switch (f) {
case MESA_FORMAT_ARGB8888:
return PACK_COLOR_8888(c[ACOMP], c[RCOMP], c[GCOMP], c[BCOMP]);
case MESA_FORMAT_ARGB8888_REV:
return PACK_COLOR_8888(c[BCOMP], c[GCOMP], c[RCOMP], c[ACOMP]);
case MESA_FORMAT_XRGB8888:
return PACK_COLOR_8888(0, c[RCOMP], c[GCOMP], c[BCOMP]);
case MESA_FORMAT_XRGB8888_REV:
return PACK_COLOR_8888(c[BCOMP], c[GCOMP], c[RCOMP], 0);
case MESA_FORMAT_RGBA8888:
return PACK_COLOR_8888(c[RCOMP], c[GCOMP], c[BCOMP], c[ACOMP]);
case MESA_FORMAT_RGBA8888_REV:
return PACK_COLOR_8888(c[ACOMP], c[BCOMP], c[GCOMP], c[RCOMP]);
case MESA_FORMAT_RGB565:
return PACK_COLOR_565(c[RCOMP], c[GCOMP], c[BCOMP]);
default:
assert(0);
}
}
static inline unsigned
pack_zs_i(gl_format f, uint32_t z, uint8_t s)
{
switch (f) {
case MESA_FORMAT_Z24_S8:
return (z & 0xffffff00) | (s & 0xff);
case MESA_FORMAT_Z24_X8:
return (z & 0xffffff00);
case MESA_FORMAT_Z16:
return (z & 0xffff0000) >> 16;
default:
assert(0);
}
}
static inline unsigned
pack_rgba_f(gl_format f, float c[])
{
return pack_rgba_i(f, (uint8_t []) {
FLOAT_TO_UBYTE(c[RCOMP]),
FLOAT_TO_UBYTE(c[GCOMP]),
FLOAT_TO_UBYTE(c[BCOMP]),
FLOAT_TO_UBYTE(c[ACOMP]) });
}
static inline unsigned
pack_rgba_clamp_f(gl_format f, float c[])
{
GLubyte bytes[4];
_mesa_unclamped_float_rgba_to_ubyte(bytes, c);
return pack_rgba_i(f, bytes);
}
static inline unsigned
pack_zs_f(gl_format f, float z, uint8_t s)
{
return pack_zs_i(f, FLOAT_TO_UINT(z), s);
}
/* Integer base-2 logarithm, rounded towards zero. */
static inline unsigned
log2i(unsigned i)
{
unsigned r = 0;
if (i & 0xffff0000) {
i >>= 16;
r += 16;
}
if (i & 0x0000ff00) {
i >>= 8;
r += 8;
}
if (i & 0x000000f0) {
i >>= 4;
r += 4;
}
if (i & 0x0000000c) {
i >>= 2;
r += 2;
}
if (i & 0x00000002) {
r += 1;
}
return r;
}
static inline unsigned
align(unsigned x, unsigned m)
{
return (x + m - 1) & ~(m - 1);
}
static inline void
get_scissors(struct gl_framebuffer *fb, int *x, int *y, int *w, int *h)
{
*w = fb->_Xmax - fb->_Xmin;
*h = fb->_Ymax - fb->_Ymin;
*x = fb->_Xmin;
*y = (fb->Name ? fb->_Ymin :
/* Window system FBO: Flip the Y coordinate. */
fb->Height - fb->_Ymax);
}
static inline void
get_viewport_scale(struct gl_context *ctx, float a[16])
{
struct gl_viewport_attrib *vp = &ctx->Viewport;
struct gl_framebuffer *fb = ctx->DrawBuffer;
a[MAT_SX] = (float)vp->Width / 2;
if (fb->Name)
a[MAT_SY] = (float)vp->Height / 2;
else
/* Window system FBO: Flip the Y coordinate. */
a[MAT_SY] = - (float)vp->Height / 2;
a[MAT_SZ] = fb->_DepthMaxF * (vp->Far - vp->Near) / 2;
}
static inline void
get_viewport_translate(struct gl_context *ctx, float a[4])
{
struct gl_viewport_attrib *vp = &ctx->Viewport;
struct gl_framebuffer *fb = ctx->DrawBuffer;
a[0] = (float)vp->Width / 2 + vp->X;
if (fb->Name)
a[1] = (float)vp->Height / 2 + vp->Y;
else
/* Window system FBO: Flip the Y coordinate. */
a[1] = fb->Height - (float)vp->Height / 2 - vp->Y;
a[2] = fb->_DepthMaxF * (vp->Far + vp->Near) / 2;
}
static inline GLboolean
is_color_operand(int op)
{
return op == GL_SRC_COLOR || op == GL_ONE_MINUS_SRC_COLOR;
}
static inline GLboolean
is_negative_operand(int op)
{
return op == GL_ONE_MINUS_SRC_COLOR || op == GL_ONE_MINUS_SRC_ALPHA;
}
static inline GLboolean
is_texture_source(int s)
{
return s == GL_TEXTURE || (s >= GL_TEXTURE0 && s <= GL_TEXTURE31);
}
static inline struct gl_texgen *
get_texgen_coord(struct gl_texture_unit *u, int i)
{
return ((struct gl_texgen *[])
{ &u->GenS, &u->GenT, &u->GenR, &u->GenQ }) [i];
}
static inline float *
get_texgen_coeff(struct gl_texgen *c)
{
if (c->Mode == GL_OBJECT_LINEAR)
return c->ObjectPlane;
else if (c->Mode == GL_EYE_LINEAR)
return c->EyePlane;
else
return NULL;
}
#endif
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