diff options
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/s_fog.c | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/src/mesa/swrast/s_fog.c b/src/mesa/swrast/s_fog.c index 747edee7794..0e65f784f8e 100644 --- a/src/mesa/swrast/s_fog.c +++ b/src/mesa/swrast/s_fog.c @@ -1,4 +1,4 @@ -/* $Id: s_fog.c,v 1.5 2000/12/15 16:42:30 brianp Exp $ */ +/* $Id: s_fog.c,v 1.6 2001/01/02 21:09:50 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -33,6 +33,7 @@ #include "s_context.h" #include "s_fog.h" +#include "s_pb.h" /* @@ -48,23 +49,33 @@ _mesa_fog_rgba_pixels( const GLcontext *ctx, const GLfixed fog[], GLchan rgba[][4] ) { - GLchan rFog = FLOAT_TO_CHAN(ctx->Fog.Color[0]); - GLchan gFog = FLOAT_TO_CHAN(ctx->Fog.Color[1]); - GLchan bFog = FLOAT_TO_CHAN(ctx->Fog.Color[2]); + const GLchan rFog = FLOAT_TO_CHAN(ctx->Fog.Color[RCOMP]); + const GLchan gFog = FLOAT_TO_CHAN(ctx->Fog.Color[GCOMP]); + const GLchan bFog = FLOAT_TO_CHAN(ctx->Fog.Color[BCOMP]); GLuint i; +#if CHAN_TYPE == GL_FLOAT for (i = 0; i < n; i++) { - GLfixed f = CLAMP(fog[i], 0, FIXED_ONE); - GLfixed g = FIXED_ONE - f; + const GLfixed cf = CLAMP(fog[i], 0, FIXED_ONE); + const GLfloat f = FixedToFloat(cf); + const GLfloat g = 1.0F - f; + rgba[i][RCOMP] = f * rgba[i][RCOMP] + g * rFog; + rgba[i][GCOMP] = f * rgba[i][GCOMP] + g * gFog; + rgba[i][BCOMP] = f * rgba[i][BCOMP] + g * bFog; + } +#else + for (i = 0; i < n; i++) { + const GLfixed f = CLAMP(fog[i], 0, FIXED_ONE); + const GLfixed g = FIXED_ONE - f; rgba[i][0] = (f * rgba[i][0] + g * rFog) >> FIXED_SHIFT; rgba[i][1] = (f * rgba[i][1] + g * gFog) >> FIXED_SHIFT; rgba[i][2] = (f * rgba[i][2] + g * bFog) >> FIXED_SHIFT; } +#endif } - /* * Apply fog to an array of color index pixels. * Input: n - number of pixels @@ -229,7 +240,8 @@ void _mesa_depth_fog_rgba_pixels( const GLcontext *ctx, GLuint n, const GLdepth z[], GLchan rgba[][4] ) { - GLfixed fog[MAX_WIDTH]; + GLfixed fog[PB_SIZE]; + ASSERT(n <= PB_SIZE); _mesa_win_fog_coords_from_z( ctx, n, z, fog ); _mesa_fog_rgba_pixels( ctx, n, fog, rgba ); } @@ -246,7 +258,8 @@ void _mesa_depth_fog_ci_pixels( const GLcontext *ctx, GLuint n, const GLdepth z[], GLuint index[] ) { - GLfixed fog[MAX_WIDTH]; + GLfixed fog[PB_SIZE]; + ASSERT(n <= PB_SIZE); _mesa_win_fog_coords_from_z( ctx, n, z, fog ); _mesa_fog_ci_pixels( ctx, n, fog, index ); } |