diff options
Diffstat (limited to 'src/mesa/swrast')
| -rw-r--r-- | src/mesa/swrast/s_blend.c | 71 | ||||
| -rw-r--r-- | src/mesa/swrast/s_tritemp.h | 6 |
2 files changed, 50 insertions, 27 deletions
diff --git a/src/mesa/swrast/s_blend.c b/src/mesa/swrast/s_blend.c index eb95bb36d33..5afc6a030c1 100644 --- a/src/mesa/swrast/s_blend.c +++ b/src/mesa/swrast/s_blend.c @@ -1,4 +1,4 @@ -/* $Id: s_blend.c,v 1.24 2002/08/07 00:45:07 brianp Exp $ */ +/* $Id: s_blend.c,v 1.25 2002/10/17 15:26:39 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -100,7 +100,7 @@ blend_transparency( GLcontext *ctx, GLuint n, const GLubyte mask[], for (i=0;i<n;i++) { if (mask[i]) { - const GLint t = rgba[i][ACOMP]; /* t in [0, CHAN_MAX] */ + const GLchan t = rgba[i][ACOMP]; /* t in [0, CHAN_MAX] */ if (t == 0) { /* 0% alpha */ rgba[i][RCOMP] = dest[i][RCOMP]; @@ -153,7 +153,8 @@ blend_transparency( GLcontext *ctx, GLuint n, const GLubyte mask[], const GLfloat r = (rgba[i][RCOMP] - dest[i][RCOMP]) * tt + dest[i][RCOMP]; const GLfloat g = (rgba[i][GCOMP] - dest[i][GCOMP]) * tt + dest[i][GCOMP]; const GLfloat b = (rgba[i][BCOMP] - dest[i][BCOMP]) * tt + dest[i][BCOMP]; - const GLfloat a = (rgba[i][ACOMP] - dest[i][ACOMP]) * tt + dest[i][ACOMP]; + const GLfloat a = CLAMP( rgba[i][ACOMP], 0.0F, CHAN_MAXF ) * t + + CLAMP( dest[i][ACOMP], 0.0F, CHAN_MAXF ) * (1.0F - t); #endif #endif ASSERT(r <= CHAN_MAX); @@ -187,13 +188,11 @@ blend_add( GLcontext *ctx, GLuint n, const GLubyte mask[], for (i=0;i<n;i++) { if (mask[i]) { #if CHAN_TYPE == GL_FLOAT - GLfloat r = rgba[i][RCOMP] + dest[i][RCOMP]; - GLfloat g = rgba[i][GCOMP] + dest[i][GCOMP]; - GLfloat b = rgba[i][BCOMP] + dest[i][BCOMP]; - GLfloat a = rgba[i][ACOMP] + dest[i][ACOMP]; - rgba[i][RCOMP] = (GLchan) MIN2( r, CHAN_MAXF ); - rgba[i][GCOMP] = (GLchan) MIN2( g, CHAN_MAXF ); - rgba[i][BCOMP] = (GLchan) MIN2( b, CHAN_MAXF ); + /* don't RGB clamp to max */ + GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, CHAN_MAXF) + dest[i][ACOMP]; + rgba[i][RCOMP] += dest[i][RCOMP]; + rgba[i][GCOMP] += dest[i][GCOMP]; + rgba[i][BCOMP] += dest[i][BCOMP]; rgba[i][ACOMP] = (GLchan) MIN2( a, CHAN_MAXF ); #else GLint r = rgba[i][RCOMP] + dest[i][RCOMP]; @@ -227,7 +226,12 @@ blend_min( GLcontext *ctx, GLuint n, const GLubyte mask[], rgba[i][RCOMP] = (GLchan) MIN2( rgba[i][RCOMP], dest[i][RCOMP] ); rgba[i][GCOMP] = (GLchan) MIN2( rgba[i][GCOMP], dest[i][GCOMP] ); rgba[i][BCOMP] = (GLchan) MIN2( rgba[i][BCOMP], dest[i][BCOMP] ); +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = (GLchan) MIN2(CLAMP(rgba[i][ACOMP], 0.0F, CHAN_MAXF), + dest[i][ACOMP]); +#else rgba[i][ACOMP] = (GLchan) MIN2( rgba[i][ACOMP], dest[i][ACOMP] ); +#endif } } } @@ -250,7 +254,12 @@ blend_max( GLcontext *ctx, GLuint n, const GLubyte mask[], rgba[i][RCOMP] = (GLchan) MAX2( rgba[i][RCOMP], dest[i][RCOMP] ); rgba[i][GCOMP] = (GLchan) MAX2( rgba[i][GCOMP], dest[i][GCOMP] ); rgba[i][BCOMP] = (GLchan) MAX2( rgba[i][BCOMP], dest[i][BCOMP] ); +#if CHAN_TYPE == GL_FLOAT + rgba[i][ACOMP] = (GLchan) MAX2(CLAMP(rgba[i][ACOMP], 0.0F, CHAN_MAXF), + dest[i][ACOMP]); +#else rgba[i][ACOMP] = (GLchan) MAX2( rgba[i][ACOMP], dest[i][ACOMP] ); +#endif } } } @@ -310,10 +319,10 @@ static void _BLENDAPI blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], GLchan rgba[][4], CONST GLchan dest[][4] ) { - GLfloat rscale = 1.0F / CHAN_MAXF; - GLfloat gscale = 1.0F / CHAN_MAXF; - GLfloat bscale = 1.0F / CHAN_MAXF; - GLfloat ascale = 1.0F / CHAN_MAXF; + const GLfloat rscale = 1.0F / CHAN_MAXF; + const GLfloat gscale = 1.0F / CHAN_MAXF; + const GLfloat bscale = 1.0F / CHAN_MAXF; + const GLfloat ascale = 1.0F / CHAN_MAXF; GLuint i; for (i=0;i<n;i++) { @@ -327,19 +336,33 @@ blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], #endif GLfloat sR, sG, sB, sA; /* Source scaling */ GLfloat dR, dG, dB, dA; /* Dest scaling */ - GLfloat r, g, b, a; + GLfloat r, g, b, a; /* result color */ - /* Source Color */ + /* Incoming/source Color */ Rs = rgba[i][RCOMP]; Gs = rgba[i][GCOMP]; Bs = rgba[i][BCOMP]; As = rgba[i][ACOMP]; +#if CHAN_TYPE == GL_FLOAT + /* clamp */ + Rs = MIN2(Rs, CHAN_MAXF); + Gs = MIN2(Gs, CHAN_MAXF); + Bs = MIN2(Bs, CHAN_MAXF); + As = MIN2(As, CHAN_MAXF); +#endif - /* Frame buffer color */ + /* Frame buffer/dest color */ Rd = dest[i][RCOMP]; Gd = dest[i][GCOMP]; Bd = dest[i][BCOMP]; Ad = dest[i][ACOMP]; +#if CHAN_TYPE == GL_FLOAT + /* clamp */ + Rd = MIN2(Rd, CHAN_MAXF); + Gd = MIN2(Gd, CHAN_MAXF); + Bd = MIN2(Bd, CHAN_MAXF); + Ad = MIN2(Ad, CHAN_MAXF); +#endif /* Source RGB factor */ switch (ctx->Color.BlendSrcRGB) { @@ -363,7 +386,7 @@ blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], sR = sG = sB = (GLfloat) As * ascale; break; case GL_ONE_MINUS_SRC_ALPHA: - sR = sG = sB = (GLfloat) 1.0F - (GLfloat) As * ascale; + sR = sG = sB = 1.0F - (GLfloat) As * ascale; break; case GL_DST_ALPHA: sR = sG = sB = (GLfloat) Ad * ascale; @@ -429,7 +452,7 @@ blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], sA = (GLfloat) As * ascale; break; case GL_ONE_MINUS_SRC_ALPHA: - sA = (GLfloat) 1.0F - (GLfloat) As * ascale; + sA = 1.0F - (GLfloat) As * ascale; break; case GL_DST_ALPHA: sA =(GLfloat) Ad * ascale; @@ -486,7 +509,7 @@ blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], dR = dG = dB = (GLfloat) As * ascale; break; case GL_ONE_MINUS_SRC_ALPHA: - dR = dG = dB = (GLfloat) 1.0F - (GLfloat) As * ascale; + dR = dG = dB = 1.0F - (GLfloat) As * ascale; break; case GL_DST_ALPHA: dR = dG = dB = (GLfloat) Ad * ascale; @@ -544,7 +567,7 @@ blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], dA = (GLfloat) As * ascale; break; case GL_ONE_MINUS_SRC_ALPHA: - dA = (GLfloat) 1.0F - (GLfloat) As * ascale; + dA = 1.0F - (GLfloat) As * ascale; break; case GL_DST_ALPHA: dA = (GLfloat) Ad * ascale; @@ -624,9 +647,9 @@ blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[], } /* final clamping */ - rgba[i][RCOMP] = CLAMP( r, 0.0F, CHAN_MAXF ); - rgba[i][GCOMP] = CLAMP( g, 0.0F, CHAN_MAXF ); - rgba[i][BCOMP] = CLAMP( b, 0.0F, CHAN_MAXF ); + rgba[i][RCOMP] = MAX2( r, 0.0F ); + rgba[i][GCOMP] = MAX2( g, 0.0F ); + rgba[i][BCOMP] = MAX2( b, 0.0F ); rgba[i][ACOMP] = CLAMP( a, 0.0F, CHAN_MAXF ); #else if (ctx->Color.BlendEquation==GL_FUNC_ADD_EXT) { diff --git a/src/mesa/swrast/s_tritemp.h b/src/mesa/swrast/s_tritemp.h index ef5e00eb5bf..dcd1f4a8d88 100644 --- a/src/mesa/swrast/s_tritemp.h +++ b/src/mesa/swrast/s_tritemp.h @@ -1,4 +1,4 @@ -/* $Id: s_tritemp.h,v 1.39 2002/10/02 23:24:04 brianp Exp $ */ +/* $Id: s_tritemp.h,v 1.40 2002/10/17 15:26:39 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -115,7 +115,7 @@ GLfloat oneOverArea; const SWvertex *vMin, *vMid, *vMax; /* Y(vMin)<=Y(vMid)<=Y(vMax) */ float bf = SWRAST_CONTEXT(ctx)->_backface_sign; - const GLint snapMask = ~((FIXED_ONE / 16) - 1); /* for x/y coord snapping */ + const GLint snapMask = ~((FIXED_ONE / (1 << SUB_PIXEL_BITS)) - 1); /* for x/y coord snapping */ GLfixed vMin_fx, vMin_fy, vMid_fx, vMid_fy, vMax_fx, vMax_fy; struct sw_span span; @@ -206,7 +206,7 @@ if (area * bf < 0.0) return; - if (area == 0.0F || IS_INF_OR_NAN(area)) + if (IS_INF_OR_NAN(area) || area == 0.0F) return; oneOverArea = 1.0F / area; |