From 33143303feaf84afbef2e63ac0adab2d70b3c344 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Tue, 10 Apr 2001 15:25:45 +0000 Subject: [PATCH] Added IROUND_POS() macro to mmath.h and use where appropriate. (Klaus Niederkrueger) --- src/mesa/drivers/x11/xm_api.c | 11 ++++--- src/mesa/main/colortab.c | 40 ++++++++++++------------ src/mesa/main/drawpix.c | 6 ++-- src/mesa/main/pixel.c | 58 +++++++++++++++++------------------ src/mesa/swrast/s_accum.c | 15 ++++----- src/mesa/swrast/s_drawpix.c | 4 +-- src/mesa/swrast/s_texture.c | 46 +++++++++++++-------------- 7 files changed, 91 insertions(+), 89 deletions(-) diff --git a/src/mesa/drivers/x11/xm_api.c b/src/mesa/drivers/x11/xm_api.c index 96dfc4bfe47..b115c92295f 100644 --- a/src/mesa/drivers/x11/xm_api.c +++ b/src/mesa/drivers/x11/xm_api.c @@ -1,4 +1,4 @@ -/* $Id: xm_api.c,v 1.19 2001/03/19 02:25:36 keithw Exp $ */ +/* $Id: xm_api.c,v 1.20 2001/04/10 15:25:45 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -71,6 +71,7 @@ #include "glthread.h" #include "matrix.h" #include "mem.h" +#include "mmath.h" #include "mtypes.h" #ifdef HAVE_CONFIG_H #include "conf.h" @@ -264,7 +265,7 @@ static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max ) } else { double x = (double) value / (double) max; - return (GLint) ((GLfloat) max * pow( x, 1.0F/gamma ) + 0.5F); + return IROUND_POS((GLfloat) max * pow(x, 1.0F/gamma)); } } @@ -985,19 +986,19 @@ static void setup_8bit_hpcr( XMesaVisual v ) g = 1.0 / v->RedGamma; for (i=0; i<256; i++) { - GLint red = (GLint) (255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g ) + 0.5); + GLint red = IROUND_POS(255.0 * pow( hpcr_rgbTbl[0][i]/255.0, g )); v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 ); } g = 1.0 / v->GreenGamma; for (i=0; i<256; i++) { - GLint green = (GLint) (255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g ) + 0.5); + GLint green = IROUND_POS(255.0 * pow( hpcr_rgbTbl[1][i]/255.0, g )); v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 ); } g = 1.0 / v->BlueGamma; for (i=0; i<256; i++) { - GLint blue = (GLint) (255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g ) + 0.5); + GLint blue = IROUND_POS(255.0 * pow( hpcr_rgbTbl[2][i]/255.0, g )); v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 ); } v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */ diff --git a/src/mesa/main/colortab.c b/src/mesa/main/colortab.c index 5a50ae50e66..61f93be2aad 100644 --- a/src/mesa/main/colortab.c +++ b/src/mesa/main/colortab.c @@ -1,4 +1,4 @@ -/* $Id: colortab.c,v 1.38 2001/03/19 02:25:35 keithw Exp $ */ +/* $Id: colortab.c,v 1.39 2001/04/10 15:25:45 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -683,7 +683,7 @@ _mesa_GetColorTable( GLenum target, GLenum format, rgba[i][RCOMP] = 0; rgba[i][GCOMP] = 0; rgba[i][BCOMP] = 0; - rgba[i][ACOMP] = (GLint) (tableF[i] * CHAN_MAXF); + rgba[i][ACOMP] = IROUND_POS(tableF[i] * CHAN_MAXF); } } else { @@ -702,9 +702,9 @@ _mesa_GetColorTable( GLenum target, GLenum format, const GLfloat *tableF = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < table->Size; i++) { - rgba[i][RCOMP] = (GLint) (tableF[i] * CHAN_MAXF); - rgba[i][GCOMP] = (GLint) (tableF[i] * CHAN_MAXF); - rgba[i][BCOMP] = (GLint) (tableF[i] * CHAN_MAXF); + rgba[i][RCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF); + rgba[i][GCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF); + rgba[i][BCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF); rgba[i][ACOMP] = CHAN_MAX; } } @@ -724,10 +724,10 @@ _mesa_GetColorTable( GLenum target, GLenum format, const GLfloat *tableF = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < table->Size; i++) { - rgba[i][RCOMP] = (GLint) (tableF[i*2+0] * CHAN_MAXF); - rgba[i][GCOMP] = (GLint) (tableF[i*2+0] * CHAN_MAXF); - rgba[i][BCOMP] = (GLint) (tableF[i*2+0] * CHAN_MAXF); - rgba[i][ACOMP] = (GLint) (tableF[i*2+1] * CHAN_MAXF); + rgba[i][RCOMP] = IROUND_POS(tableF[i*2+0] * CHAN_MAXF); + rgba[i][GCOMP] = IROUND_POS(tableF[i*2+0] * CHAN_MAXF); + rgba[i][BCOMP] = IROUND_POS(tableF[i*2+0] * CHAN_MAXF); + rgba[i][ACOMP] = IROUND_POS(tableF[i*2+1] * CHAN_MAXF); } } else { @@ -746,10 +746,10 @@ _mesa_GetColorTable( GLenum target, GLenum format, const GLfloat *tableF = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < table->Size; i++) { - rgba[i][RCOMP] = (GLint) (tableF[i] * CHAN_MAXF); - rgba[i][GCOMP] = (GLint) (tableF[i] * CHAN_MAXF); - rgba[i][BCOMP] = (GLint) (tableF[i] * CHAN_MAXF); - rgba[i][ACOMP] = (GLint) (tableF[i] * CHAN_MAXF); + rgba[i][RCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF); + rgba[i][GCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF); + rgba[i][BCOMP] = IROUND_POS(tableF[i] * CHAN_MAXF); + rgba[i][ACOMP] = IROUND_POS(tableF[i] * CHAN_MAXF); } } else { @@ -768,9 +768,9 @@ _mesa_GetColorTable( GLenum target, GLenum format, const GLfloat *tableF = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < table->Size; i++) { - rgba[i][RCOMP] = (GLint) (tableF[i*3+0] * CHAN_MAXF); - rgba[i][GCOMP] = (GLint) (tableF[i*3+1] * CHAN_MAXF); - rgba[i][BCOMP] = (GLint) (tableF[i*3+2] * CHAN_MAXF); + rgba[i][RCOMP] = IROUND_POS(tableF[i*3+0] * CHAN_MAXF); + rgba[i][GCOMP] = IROUND_POS(tableF[i*3+1] * CHAN_MAXF); + rgba[i][BCOMP] = IROUND_POS(tableF[i*3+2] * CHAN_MAXF); rgba[i][ACOMP] = CHAN_MAX; } } @@ -790,10 +790,10 @@ _mesa_GetColorTable( GLenum target, GLenum format, const GLfloat *tableF = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < table->Size; i++) { - rgba[i][RCOMP] = (GLint) (tableF[i*4+0] * CHAN_MAXF + 0.5F); - rgba[i][GCOMP] = (GLint) (tableF[i*4+1] * CHAN_MAXF + 0.5F); - rgba[i][BCOMP] = (GLint) (tableF[i*4+2] * CHAN_MAXF + 0.5F); - rgba[i][ACOMP] = (GLint) (tableF[i*4+3] * CHAN_MAXF + 0.5F); + rgba[i][RCOMP] = IROUND_POS(tableF[i*4+0] * CHAN_MAXF); + rgba[i][GCOMP] = IROUND_POS(tableF[i*4+1] * CHAN_MAXF); + rgba[i][BCOMP] = IROUND_POS(tableF[i*4+2] * CHAN_MAXF); + rgba[i][ACOMP] = IROUND_POS(tableF[i*4+3] * CHAN_MAXF); } } else { diff --git a/src/mesa/main/drawpix.c b/src/mesa/main/drawpix.c index 4b34ddd707a..d46ace0a655 100644 --- a/src/mesa/main/drawpix.c +++ b/src/mesa/main/drawpix.c @@ -1,4 +1,4 @@ -/* $Id: drawpix.c,v 1.51 2001/03/19 02:25:35 keithw Exp $ */ +/* $Id: drawpix.c,v 1.52 2001/04/10 15:25:45 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -64,8 +64,8 @@ _mesa_DrawPixels( GLsizei width, GLsizei height, _mesa_update_state(ctx); } - x = (GLint) (ctx->Current.RasterPos[0] + 0.5F); - y = (GLint) (ctx->Current.RasterPos[1] + 0.5F); + x = IROUND(ctx->Current.RasterPos[0]); + y = IROUND(ctx->Current.RasterPos[1]); ctx->OcclusionResult = GL_TRUE; ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type, diff --git a/src/mesa/main/pixel.c b/src/mesa/main/pixel.c index 6a31d5a59fe..dc8f5be3073 100644 --- a/src/mesa/main/pixel.c +++ b/src/mesa/main/pixel.c @@ -1,4 +1,4 @@ -/* $Id: pixel.c,v 1.27 2001/03/12 00:48:38 gareth Exp $ */ +/* $Id: pixel.c,v 1.28 2001/04/10 15:25:45 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -832,10 +832,10 @@ _mesa_map_rgba( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] ) const GLfloat *aMap = ctx->Pixel.MapAtoA; GLuint i; for (i=0;iTable; GLuint i; for (i = 0; i < n; i++) { - GLint j = (GLint) (rgba[i][RCOMP] * scale + 0.5F); + GLint j = IROUND(rgba[i][RCOMP] * scale); GLfloat c = CHAN_TO_FLOAT(lut[j]); rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = rgba[i][ACOMP] = c; @@ -900,7 +900,7 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLfloat *lut = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint j = (GLint) (rgba[i][RCOMP] * scale + 0.5F); + GLint j = IROUND(rgba[i][RCOMP] * scale); GLfloat c = lut[j]; rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = rgba[i][ACOMP] = c; @@ -914,7 +914,7 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLchan *lut = (const GLchan *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint j = (GLint) (rgba[i][RCOMP] * scale + 0.5F); + GLint j = IROUND(rgba[i][RCOMP] * scale); GLfloat c = CHAN_TO_FLOAT(lut[j]); rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c; } @@ -924,7 +924,7 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLfloat *lut = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint j = (GLint) (rgba[i][RCOMP] * scale + 0.5F); + GLint j = IROUND(rgba[i][RCOMP] * scale); GLfloat c = lut[j]; rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c; } @@ -937,7 +937,7 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLchan *lut = (const GLchan *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint j = (GLint) (rgba[i][ACOMP] * scale + 0.5F); + GLint j = IROUND(rgba[i][ACOMP] * scale); rgba[i][ACOMP] = CHAN_TO_FLOAT(lut[j]); } } @@ -946,7 +946,7 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLfloat *lut = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint j = (GLint) (rgba[i][ACOMP] * scale + 0.5F); + GLint j = IROUND(rgba[i][ACOMP] * scale); rgba[i][ACOMP] = lut[j]; } } @@ -958,8 +958,8 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLchan *lut = (const GLchan *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint jL = (GLint) (rgba[i][RCOMP] * scale + 0.5F); - GLint jA = (GLint) (rgba[i][ACOMP] * scale + 0.5F); + GLint jL = IROUND(rgba[i][RCOMP] * scale); + GLint jA = IROUND(rgba[i][ACOMP] * scale); GLfloat luminance = CHAN_TO_FLOAT(lut[jL * 2 + 0]); GLfloat alpha = CHAN_TO_FLOAT(lut[jA * 2 + 1]); rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance; @@ -971,8 +971,8 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLfloat *lut = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint jL = (GLint) (rgba[i][RCOMP] * scale + 0.5F); - GLint jA = (GLint) (rgba[i][ACOMP] * scale + 0.5F); + GLint jL = IROUND(rgba[i][RCOMP] * scale); + GLint jA = IROUND(rgba[i][ACOMP] * scale); GLfloat luminance = lut[jL * 2 + 0]; GLfloat alpha = lut[jA * 2 + 1]; rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance; @@ -987,9 +987,9 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLchan *lut = (const GLchan *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint jR = (GLint) (rgba[i][RCOMP] * scale + 0.5F); - GLint jG = (GLint) (rgba[i][GCOMP] * scale + 0.5F); - GLint jB = (GLint) (rgba[i][BCOMP] * scale + 0.5F); + GLint jR = IROUND(rgba[i][RCOMP] * scale); + GLint jG = IROUND(rgba[i][GCOMP] * scale); + GLint jB = IROUND(rgba[i][BCOMP] * scale); rgba[i][RCOMP] = CHAN_TO_FLOAT(lut[jR * 3 + 0]); rgba[i][GCOMP] = CHAN_TO_FLOAT(lut[jG * 3 + 1]); rgba[i][BCOMP] = CHAN_TO_FLOAT(lut[jB * 3 + 2]); @@ -1000,9 +1000,9 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLfloat *lut = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint jR = (GLint) (rgba[i][RCOMP] * scale + 0.5F); - GLint jG = (GLint) (rgba[i][GCOMP] * scale + 0.5F); - GLint jB = (GLint) (rgba[i][BCOMP] * scale + 0.5F); + GLint jR = IROUND(rgba[i][RCOMP] * scale); + GLint jG = IROUND(rgba[i][GCOMP] * scale); + GLint jB = IROUND(rgba[i][BCOMP] * scale); rgba[i][RCOMP] = lut[jR * 3 + 0]; rgba[i][GCOMP] = lut[jG * 3 + 1]; rgba[i][BCOMP] = lut[jB * 3 + 2]; @@ -1016,10 +1016,10 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLchan *lut = (const GLchan *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint jR = (GLint) (rgba[i][RCOMP] * scale + 0.5F); - GLint jG = (GLint) (rgba[i][GCOMP] * scale + 0.5F); - GLint jB = (GLint) (rgba[i][BCOMP] * scale + 0.5F); - GLint jA = (GLint) (rgba[i][ACOMP] * scale + 0.5F); + GLint jR = IROUND(rgba[i][RCOMP] * scale); + GLint jG = IROUND(rgba[i][GCOMP] * scale); + GLint jB = IROUND(rgba[i][BCOMP] * scale); + GLint jA = IROUND(rgba[i][ACOMP] * scale); rgba[i][RCOMP] = CHAN_TO_FLOAT(lut[jR * 4 + 0]); rgba[i][GCOMP] = CHAN_TO_FLOAT(lut[jG * 4 + 1]); rgba[i][BCOMP] = CHAN_TO_FLOAT(lut[jB * 4 + 2]); @@ -1031,10 +1031,10 @@ _mesa_lookup_rgba(const struct gl_color_table *table, const GLfloat *lut = (const GLfloat *) table->Table; GLuint i; for (i = 0; i < n; i++) { - GLint jR = (GLint) (rgba[i][RCOMP] * scale + 0.5F); - GLint jG = (GLint) (rgba[i][GCOMP] * scale + 0.5F); - GLint jB = (GLint) (rgba[i][BCOMP] * scale + 0.5F); - GLint jA = (GLint) (rgba[i][ACOMP] * scale + 0.5F); + GLint jR = IROUND(rgba[i][RCOMP] * scale); + GLint jG = IROUND(rgba[i][GCOMP] * scale); + GLint jB = IROUND(rgba[i][BCOMP] * scale); + GLint jA = IROUND(rgba[i][ACOMP] * scale); rgba[i][RCOMP] = lut[jR * 4 + 0]; rgba[i][GCOMP] = lut[jG * 4 + 1]; rgba[i][BCOMP] = lut[jB * 4 + 2]; diff --git a/src/mesa/swrast/s_accum.c b/src/mesa/swrast/s_accum.c index d93396677f1..f338886c9c7 100644 --- a/src/mesa/swrast/s_accum.c +++ b/src/mesa/swrast/s_accum.c @@ -1,4 +1,4 @@ -/* $Id: s_accum.c,v 1.9 2001/03/19 02:25:36 keithw Exp $ */ +/* $Id: s_accum.c,v 1.10 2001/04/10 15:25:45 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -27,6 +27,7 @@ #include "context.h" #include "macros.h" +#include "mmath.h" #include "mem.h" #include "s_accum.h" @@ -449,7 +450,7 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value, GLint j; if (mult != prevMult) { for (j = 0; j < max; j++) - multTable[j] = (GLint) ((GLfloat) j * mult + 0.5F); + multTable[j] = IROUND((GLfloat) j * mult); prevMult = mult; } @@ -490,11 +491,11 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value, for (j=0;jDrawBuffer->Accum + ypos * width4 + xpos*4; for (i=0;iCurrent.RasterPos[1] + 0.5F); + zoomY0 = IROUND(ctx->Current.RasterPos[1]); } diff --git a/src/mesa/swrast/s_texture.c b/src/mesa/swrast/s_texture.c index 73e1b6718d1..55c5277fd33 100644 --- a/src/mesa/swrast/s_texture.c +++ b/src/mesa/swrast/s_texture.c @@ -1,4 +1,4 @@ -/* $Id: s_texture.c,v 1.21 2001/03/28 20:40:52 gareth Exp $ */ +/* $Id: s_texture.c,v 1.22 2001/04/10 15:25:45 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -320,10 +320,10 @@ sample_1d_linear(GLcontext *ctx, } { - const GLfloat a = FRAC(u); + const GLfloat a = FRAC(u + 1.0F); /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - const GLint w0 = IROUND((1.0F-a) * WEIGHT_SCALE); - const GLint w1 = IROUND( a * WEIGHT_SCALE); + const GLint w0 = IROUND_POS((1.0F-a) * WEIGHT_SCALE); + const GLint w1 = IROUND_POS( a * WEIGHT_SCALE); GLchan t0[4], t1[4]; /* texels */ @@ -612,13 +612,13 @@ sample_2d_linear(GLcontext *ctx, } { - const GLfloat a = FRAC(u); - const GLfloat b = FRAC(v); + const GLfloat a = FRAC(u + 1.0F); /* add one in case u is just below 0 */ + const GLfloat b = FRAC(v + 1.0F); /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - const GLint w00 = IROUND((1.0F-a) * (1.0F-b) * WEIGHT_SCALE); - const GLint w10 = IROUND( a * (1.0F-b) * WEIGHT_SCALE); - const GLint w01 = IROUND((1.0F-a) * b * WEIGHT_SCALE); - const GLint w11 = IROUND( a * b * WEIGHT_SCALE); + const GLint w00 = IROUND_POS((1.0F-a) * (1.0F-b) * WEIGHT_SCALE); + const GLint w10 = IROUND_POS( a * (1.0F-b) * WEIGHT_SCALE); + const GLint w01 = IROUND_POS((1.0F-a) * b * WEIGHT_SCALE); + const GLint w11 = IROUND_POS( a * b * WEIGHT_SCALE); GLchan t00[4]; GLchan t10[4]; GLchan t01[4]; @@ -1032,18 +1032,18 @@ sample_3d_linear(GLcontext *ctx, } { - const GLfloat a = FRAC(u); - const GLfloat b = FRAC(v); - const GLfloat c = FRAC(w); + const GLfloat a = FRAC(u + 1.0F); + const GLfloat b = FRAC(v + 1.0F); + const GLfloat c = FRAC(w + 1.0F); /* compute sample weights in fixed point in [0,WEIGHT_SCALE] */ - GLint w000 = IROUND((1.0F-a) * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); - GLint w100 = IROUND( a * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); - GLint w010 = IROUND((1.0F-a) * b * (1.0F-c) * WEIGHT_SCALE); - GLint w110 = IROUND( a * b * (1.0F-c) * WEIGHT_SCALE); - GLint w001 = IROUND((1.0F-a) * (1.0F-b) * c * WEIGHT_SCALE); - GLint w101 = IROUND( a * (1.0F-b) * c * WEIGHT_SCALE); - GLint w011 = IROUND((1.0F-a) * b * c * WEIGHT_SCALE); - GLint w111 = IROUND( a * b * c * WEIGHT_SCALE); + GLint w000 = IROUND_POS((1.0F-a) * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); + GLint w100 = IROUND_POS( a * (1.0F-b) * (1.0F-c) * WEIGHT_SCALE); + GLint w010 = IROUND_POS((1.0F-a) * b * (1.0F-c) * WEIGHT_SCALE); + GLint w110 = IROUND_POS( a * b * (1.0F-c) * WEIGHT_SCALE); + GLint w001 = IROUND_POS((1.0F-a) * (1.0F-b) * c * WEIGHT_SCALE); + GLint w101 = IROUND_POS( a * (1.0F-b) * c * WEIGHT_SCALE); + GLint w011 = IROUND_POS((1.0F-a) * b * c * WEIGHT_SCALE); + GLint w111 = IROUND_POS( a * b * c * WEIGHT_SCALE); GLchan t000[4], t010[4], t001[4], t011[4]; GLchan t100[4], t110[4], t101[4], t111[4]; @@ -2531,8 +2531,8 @@ sample_depth_texture(const GLcontext *ctx, if (0) { /* compute a single weighted depth sample and do one comparison */ - const GLfloat a = FRAC(u); - const GLfloat b = FRAC(v); + const GLfloat a = FRAC(u + 1.0F); + const GLfloat b = FRAC(v + 1.0F); const GLfloat w00 = (1.0F - a) * (1.0F - b); const GLfloat w10 = ( a) * (1.0F - b); const GLfloat w01 = (1.0F - a) * ( b); -- 2.30.2