-/* $Id: s_points.c,v 1.2 2000/11/05 18:24:40 keithw Exp $ */
+/* $Id: s_points.c,v 1.18 2002/05/27 17:04:53 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.4
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ * Version: 4.1
+ *
+ * Copyright (C) 1999-2002 Brian Paul 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 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
#include "glheader.h"
+#include "colormac.h"
#include "context.h"
#include "macros.h"
#include "mmath.h"
#include "texstate.h"
-#include "vb.h"
-
#include "s_context.h"
#include "s_feedback.h"
-#include "s_pb.h"
#include "s_points.h"
#include "s_span.h"
-/**********************************************************************/
-/***** Rasterization *****/
-/**********************************************************************/
-
-
-/*
- * There are 3 pairs (RGBA, CI) of point rendering functions:
- * 1. simple: size=1 and no special rasterization functions (fastest)
- * 2. size1: size=1 and any rasterization functions
- * 3. general: any size and rasterization functions (slowest)
- *
- */
-
-
+#define RGBA 0x1
+#define INDEX 0x2
+#define SMOOTH 0x4
+#define TEXTURE 0x8
+#define SPECULAR 0x10
+#define LARGE 0x20
+#define ATTENUATE 0x40
+#define SPRITE 0x80
/*
* CI points with size == 1.0
*/
-static void
-size1_ci_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
- GLint *pbx = PB->x, *pby = PB->y;
- GLdepth *pbz = PB->z;
- GLfixed *pbfog = PB->fog;
- GLuint *pbi = PB->index;
- GLuint pbcount = PB->count;
-
- pbx[pbcount] = (GLint) vert->win[0];
- pby[pbcount] = (GLint) vert->win[1];
- pbz[pbcount] = (GLint) vert->win[2];
- pbfog[pbcount] = FloatToFixed(vert->fog);
- pbi[pbcount] = vert->index;
-
- PB->count++;
- PB_CHECK_FLUSH(ctx, PB);
-}
-
+#define FLAGS (INDEX)
+#define NAME size1_ci_point
+#include "s_pointtemp.h"
/*
- * RGBA points with size == 1.0
+ * General CI points.
*/
-static void
-size1_rgba_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
-
- GLint x = (GLint) vert->win[0];
- GLint y = (GLint) vert->win[1];
- GLint z = (GLint) (vert->win[2]);
- GLfixed fog = FloatToFixed( vert->fog );
- GLubyte red = vert->color[0];
- GLubyte green = vert->color[1];
- GLubyte blue = vert->color[2];
- GLubyte alpha = vert->color[3];
-
- PB_WRITE_RGBA_PIXEL( PB, x, y, z, fog, red, green, blue, alpha );
- PB_CHECK_FLUSH(ctx, PB);
-}
-
+#define FLAGS (INDEX | LARGE)
+#define NAME general_ci_point
+#include "s_pointtemp.h"
/*
- * General CI points.
+ * Antialiased CI points.
*/
-static void
-general_ci_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
- const GLint isize = (GLint) (ctx->Point.Size + 0.5F);
- GLint radius = isize >> 1;
-
- GLint x0, x1, y0, y1;
- GLint ix, iy;
+#define FLAGS (INDEX | SMOOTH)
+#define NAME antialiased_ci_point
+#include "s_pointtemp.h"
- GLint x = (GLint) vert->win[0];
- GLint y = (GLint) vert->win[1];
- GLint z = (GLint) (vert->win[2]);
- GLfixed fog = FloatToFixed( vert->fog );
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
+/*
+ * Distance attenuated, general CI points.
+ */
+#define FLAGS (INDEX | ATTENUATE)
+#define NAME atten_general_ci_point
+#include "s_pointtemp.h"
- PB_SET_INDEX( PB, vert->index );
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z, fog );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
-}
+/*
+ * RGBA points with size == 1.0
+ */
+#define FLAGS (RGBA)
+#define NAME size1_rgba_point
+#include "s_pointtemp.h"
/*
* General RGBA points.
*/
-static void
-general_rgba_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
- GLint isize = (GLint) (ctx->Point.Size + 0.5F);
- GLint radius = isize >> 1;
-
- GLint x0, x1, y0, y1;
- GLint ix, iy;
-
- GLint x = (GLint) vert->win[0];
- GLint y = (GLint) vert->win[1];
- GLint z = (GLint) (vert->win[2]);
-
- GLfixed fog = FloatToFixed( vert->fog );
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- PB_SET_COLOR( PB,
- vert->color[0],
- vert->color[1],
- vert->color[2],
- vert->color[3] );
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z, fog );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
-}
+#define FLAGS (RGBA | LARGE)
+#define NAME general_rgba_point
+#include "s_pointtemp.h"
+/*
+ * Antialiased RGBA points.
+ */
+#define FLAGS (RGBA | SMOOTH)
+#define NAME antialiased_rgba_point
+#include "s_pointtemp.h"
/*
* Textured RGBA points.
*/
-static void
-textured_rgba_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
-
- GLint x0, x1, y0, y1;
- GLint ix, iy, radius;
- GLint red, green, blue, alpha;
- GLfloat s, t, u;
-
- GLint x = (GLint) vert->win[0];
- GLint y = (GLint) vert->win[1];
- GLint z = (GLint) (vert->win[2]);
- GLint isize = (GLint) (ctx->Point.Size + 0.5F);
-
- GLfixed fog = FloatToFixed( vert->fog );
-
- if (isize < 1) {
- isize = 1;
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- red = vert->color[0];
- green = vert->color[1];
- blue = vert->color[2];
- alpha = vert->color[3];
-
- if (vert->texcoord[0][3] != 1.0) {
- s = vert->texcoord[0][0]/vert->texcoord[0][3];
- t = vert->texcoord[0][1]/vert->texcoord[0][3];
- u = vert->texcoord[0][2]/vert->texcoord[0][3];
- } else {
- s = vert->texcoord[0][0];
- t = vert->texcoord[0][1];
- u = vert->texcoord[0][2];
- }
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_TEX_PIXEL( PB, ix, iy, z, fog, red, green, blue, alpha,
- s, t, u );
- }
- }
-
- PB_CHECK_FLUSH(ctx, PB);
-}
-
+#define FLAGS (RGBA | LARGE | TEXTURE | SPECULAR)
+#define NAME textured_rgba_point
+#include "s_pointtemp.h"
/*
- * Multitextured RGBA points.
+ * Antialiased points with texture mapping.
*/
-static void
-multitextured_rgba_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
-
- const GLint red = vert->color[0];
- const GLint green = vert->color[1];
- const GLint blue = vert->color[2];
- const GLint alpha = vert->color[3];
- const GLint sRed = vert->specular[0];
- const GLint sGreen = vert->specular[1];
- const GLint sBlue = vert->specular[2];
- const GLint x = (GLint) vert->win[0];
- const GLint y = (GLint) vert->win[1];
- const GLint z = (GLint) (vert->win[2]);
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLint radius, u;
- GLint isize = (GLint) (ctx->Point.Size + 0.5F);
-
- GLfixed fog = FloatToFixed( vert->fog );
-
- if (isize < 1) {
- isize = 1;
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
-
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- if (vert->texcoord[u][3] != 1.0) {
- texcoord[u][0] = vert->texcoord[u][0] /
- vert->texcoord[u][3];
- texcoord[u][1] = vert->texcoord[u][1] /
- vert->texcoord[u][3];
- texcoord[u][2] = vert->texcoord[u][2] /
- vert->texcoord[u][3];
- }
- else {
- texcoord[u][0] = vert->texcoord[u][0];
- texcoord[u][1] = vert->texcoord[u][1];
- texcoord[u][2] = vert->texcoord[u][2];
- }
- }
- }
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_MULTITEX_SPEC_PIXEL( PB, ix, iy, z, fog,
- red, green, blue, alpha,
- sRed, sGreen, sBlue,
- texcoord );
- }
- }
- PB_CHECK_FLUSH(ctx, PB);
-}
+#define FLAGS (RGBA | SMOOTH | TEXTURE | SPECULAR)
+#define NAME antialiased_tex_rgba_point
+#include "s_pointtemp.h"
/*
- * NOTES on aa point rasterization:
- *
- * Let d = distance of fragment center from vertex.
- * if d < rmin2 then
- * fragment has 100% coverage
- * else if d > rmax2 then
- * fragment has 0% coverage
- * else
- * fragement has % coverage = (d - rmin2) / (rmax2 - rmin2)
+ * Distance attenuated, general RGBA points.
*/
+#define FLAGS (RGBA | ATTENUATE)
+#define NAME atten_general_rgba_point
+#include "s_pointtemp.h"
/*
- * Antialiased points with or without texture mapping.
+ * Distance attenuated, textured RGBA points.
*/
-static void
-antialiased_rgba_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
- const GLfloat radius = ctx->Point.Size * 0.5F;
- const GLfloat rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
- const GLfloat rmax = radius + 0.7071F;
- const GLfloat rmin2 = MAX2(0.0, rmin * rmin);
- const GLfloat rmax2 = rmax * rmax;
- const GLfloat cscale = 256.0F / (rmax2 - rmin2);
-
- if (ctx->Texture._ReallyEnabled) {
- GLint x, y;
- GLfloat vx = vert->win[0];
- GLfloat vy = vert->win[1];
- const GLint xmin = (GLint) (vx - radius);
- const GLint xmax = (GLint) (vx + radius);
- const GLint ymin = (GLint) (vy - radius);
- const GLint ymax = (GLint) (vy + radius);
- const GLint z = (GLint) (vert->win[2]);
- const GLint red = vert->color[0];
- const GLint green = vert->color[1];
- const GLint blue = vert->color[2];
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLint u, alpha;
-
- GLfixed fog = FloatToFixed( vert->fog );
-
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- if (texcoord[u][3] != 1.0) {
- texcoord[u][0] = (vert->texcoord[u][0] /
- vert->texcoord[u][3]);
- texcoord[u][1] = (vert->texcoord[u][1] /
- vert->texcoord[u][3]);
- texcoord[u][2] = (vert->texcoord[u][2] /
- vert->texcoord[u][3]);
- }
- else {
- texcoord[u][0] = vert->texcoord[u][0];
- texcoord[u][1] = vert->texcoord[u][1];
- texcoord[u][2] = vert->texcoord[u][2];
- }
- }
- }
-
- /* translate by a half pixel to simplify math below */
- vx -= 0.5F;
- vx -= 0.5F;
-
- for (y = ymin; y <= ymax; y++) {
- for (x = xmin; x <= xmax; x++) {
- const GLfloat dx = x - vx;
- const GLfloat dy = y - vy;
- const GLfloat dist2 = dx*dx + dy*dy;
- if (dist2 < rmax2) {
- alpha = vert->color[3];
- if (dist2 >= rmin2) {
- GLint coverage = (GLint) (256.0F - (dist2 - rmin2) * cscale);
- /* coverage is in [0,256] */
- alpha = (alpha * coverage) >> 8;
- }
- if (ctx->Texture._MultiTextureEnabled) {
- PB_WRITE_MULTITEX_PIXEL( PB, x,y,z, fog,
- red, green, blue,
- alpha, texcoord );
- }
- else {
- PB_WRITE_TEX_PIXEL( PB, x,y,z, fog,
- red, green, blue, alpha,
- texcoord[0][0],
- texcoord[0][1],
- texcoord[0][2] );
- }
- }
- }
- }
-
- PB_CHECK_FLUSH(ctx,PB);
- }
- else {
- /* Not texture mapped */
- const GLint xmin = (GLint) (vert->win[0] - 0.0 - radius);
- const GLint xmax = (GLint) (vert->win[0] - 0.0 + radius);
- const GLint ymin = (GLint) (vert->win[1] - 0.0 - radius);
- const GLint ymax = (GLint) (vert->win[1] - 0.0 + radius);
- const GLint red = vert->color[0];
- const GLint green = vert->color[1];
- const GLint blue = vert->color[2];
- const GLint z = (GLint) (vert->win[2]);
- GLint x, y;
-
- GLfixed fog = FloatToFixed( vert->fog );
-
- /*
- printf("point %g, %g\n", vert->win[0], vert->win[1]);
- printf("%d..%d X %d..%d\n", xmin, xmax, ymin, ymax);
- */
- for (y = ymin; y <= ymax; y++) {
- for (x = xmin; x <= xmax; x++) {
- const GLfloat dx = x + 0.5F - vert->win[0];
- const GLfloat dy = y + 0.5F - vert->win[1];
- const GLfloat dist2 = dx*dx + dy*dy;
- if (dist2 < rmax2) {
- GLint alpha = vert->color[3];
- if (dist2 >= rmin2) {
- GLint coverage = (GLint) (256.0F - (dist2 - rmin2) * cscale);
- /* coverage is in [0,256] */
- alpha = (alpha * coverage) >> 8;
- }
- PB_WRITE_RGBA_PIXEL(PB, x, y, z, fog,
- red, green, blue, alpha);
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
-}
-
-
+#define FLAGS (RGBA | ATTENUATE | TEXTURE | SPECULAR)
+#define NAME atten_textured_rgba_point
+#include "s_pointtemp.h"
-/* Definition of the functions for GL_EXT_point_parameters */
-/* Calculates the distance attenuation formula of a vector of points in
- * eye space coordinates
+/*
+ * Distance attenuated, antialiased points with or without texture mapping.
*/
-static GLfloat attenuation_distance(const GLcontext *ctx, const GLfloat *pos)
-{
- GLfloat dist = GL_SQRT(pos[0]*pos[0]+pos[1]*pos[1]+pos[2]*pos[2]);
- return 1.0F / (ctx->Point.Params[0] +
- dist * (ctx->Point.Params[1] +
- dist * ctx->Point.Params[2]));
-}
-
-
-
+#define FLAGS (RGBA | ATTENUATE | TEXTURE | SMOOTH)
+#define NAME atten_antialiased_rgba_point
+#include "s_pointtemp.h"
/*
- * Distance Attenuated General CI points.
+ * Sprite (textured point)
*/
-static void
-dist_atten_general_ci_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
- const GLfloat psize = ctx->Point.Size;
- GLfloat dist = attenuation_distance( ctx, vert->eye );
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
- GLint x = (GLint) vert->win[0];
- GLint y = (GLint) vert->win[1];
- GLint z = (GLint) (vert->win[2]);
- GLfloat dsize = psize * dist;
-
- GLfixed fog = FloatToFixed( vert->fog );
-
- if (dsize >= ctx->Point.Threshold) {
- isize = (GLint) (MIN2(dsize, ctx->Point.MaxSize) + 0.5F);
- }
- else {
- isize = (GLint) (MAX2(ctx->Point.Threshold, ctx->Point.MinSize) + 0.5F);
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
+#define FLAGS (RGBA | SPRITE)
+#define NAME sprite_point
+#include "s_pointtemp.h"
- PB_SET_INDEX( PB, vert->index );
- for (iy=y0;iy<=y1;iy++) {
- for (ix=x0;ix<=x1;ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z, fog );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
-}
+#define FLAGS (RGBA | ATTENUATE | SPRITE)
+#define NAME atten_sprite_point
+#include "s_pointtemp.h"
-/*
- * Distance Attenuated General RGBA points.
- */
-static void
-dist_atten_general_rgba_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
- const GLfloat psize = ctx->Point.Size;
- GLfloat dist = attenuation_distance( ctx, vert->eye );
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
- GLint x = (GLint) vert->win[0];
- GLint y = (GLint) vert->win[1];
- GLint z = (GLint) (vert->win[2]);
- GLfloat dsize=psize*dist;
- GLchan alpha;
- GLfixed fog = FloatToFixed( vert->fog );
-
- if (dsize >= ctx->Point.Threshold) {
- isize = (GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
- alpha = vert->color[3];
- }
- else {
- isize = (GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
- dsize /= ctx->Point.Threshold;
- alpha = (GLint) (vert->color[3]* (dsize*dsize));
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
- PB_SET_COLOR( PB,
- vert->color[0],
- vert->color[1],
- vert->color[2],
- alpha );
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z, fog );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
+void _swrast_add_spec_terms_point( GLcontext *ctx,
+ const SWvertex *v0 )
+{
+ SWvertex *ncv0 = (SWvertex *)v0;
+ GLchan c[1][4];
+ COPY_CHAN4( c[0], ncv0->color );
+ ACC_3V( ncv0->color, ncv0->specular );
+ SWRAST_CONTEXT(ctx)->SpecPoint( ctx, ncv0 );
+ COPY_CHAN4( ncv0->color, c[0] );
}
-/*
- * Distance Attenuated Textured RGBA points.
- */
-static void
-dist_atten_textured_rgba_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
- const GLfloat psize = ctx->Point.Size;
- GLfloat dist = attenuation_distance( ctx, vert->eye );
-
- const GLint x = (GLint) vert->win[0];
- const GLint y = (GLint) vert->win[1];
- const GLint z = (GLint) (vert->win[2]);
- const GLint red = vert->color[0];
- const GLint green = vert->color[1];
- const GLint blue = vert->color[2];
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLint x0, x1, y0, y1;
- GLint ix, iy, alpha, u;
- GLint isize, radius;
- GLfloat dsize = psize*dist;
-
- GLfixed fog = FloatToFixed( vert->fog );
-
- /* compute point size and alpha */
- if (dsize >= ctx->Point.Threshold) {
- isize = (GLint) (MIN2(dsize, ctx->Point.MaxSize) + 0.5F);
- alpha = vert->color[3];
- }
- else {
- isize = (GLint) (MAX2(ctx->Point.Threshold, ctx->Point.MinSize) + 0.5F);
- dsize /= ctx->Point.Threshold;
- alpha = (GLint) (vert->color[3] * (dsize * dsize));
- }
- if (isize < 1) {
- isize = 1;
- }
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
- }
- else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
- }
- /* get texture coordinates */
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- if (texcoord[u][3] != 1.0) {
- texcoord[u][0] = vert->texcoord[u][0] /
- vert->texcoord[u][3];
- texcoord[u][1] = vert->texcoord[u][1] /
- vert->texcoord[u][3];
- texcoord[u][2] = vert->texcoord[u][2] /
- vert->texcoord[u][3];
- }
- else {
- texcoord[u][0] = vert->texcoord[u][0];
- texcoord[u][1] = vert->texcoord[u][1];
- texcoord[u][2] = vert->texcoord[u][2];
- }
- }
- }
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- if (ctx->Texture._MultiTextureEnabled) {
- PB_WRITE_MULTITEX_PIXEL( PB, ix, iy, z, fog,
- red, green, blue, alpha,
- texcoord );
- }
- else {
- PB_WRITE_TEX_PIXEL( PB, ix, iy, z, fog,
- red, green, blue, alpha,
- texcoord[0][0],
- texcoord[0][1],
- texcoord[0][2] );
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
-}
+/* record the current point function name */
+#ifdef DEBUG
-/*
- * Distance Attenuated Antialiased points with or without texture mapping.
- */
-static void
-dist_atten_antialiased_rgba_point( GLcontext *ctx, SWvertex *vert )
-{
- struct pixel_buffer *PB = SWRAST_CONTEXT(ctx)->PB;
- const GLfloat psize = ctx->Point.Size;
- GLfloat dist = attenuation_distance( ctx, vert->eye );
-
- if (ctx->Texture._ReallyEnabled) {
- GLfloat radius, rmin, rmax, rmin2, rmax2, cscale, alphaf;
- GLint xmin, ymin, xmax, ymax;
- GLint x, y, z;
- GLint red, green, blue, alpha;
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLfloat dsize = psize * dist;
- GLint u;
-
- GLfixed fog = FloatToFixed( vert->fog );
-
- if (dsize >= ctx->Point.Threshold) {
- radius = MIN2(dsize, ctx->Point.MaxSize) * 0.5F;
- alphaf = 1.0F;
- }
- else {
- radius = (MAX2(ctx->Point.Threshold, ctx->Point.MinSize) * 0.5F);
- dsize /= ctx->Point.Threshold;
- alphaf = (dsize*dsize);
- }
- rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
- rmax = radius + 0.7071F;
- rmin2 = MAX2(0.0, rmin * rmin);
- rmax2 = rmax * rmax;
- cscale = 256.0F / (rmax2 - rmin2);
-
- xmin = (GLint) (vert->win[0] - radius);
- xmax = (GLint) (vert->win[0] + radius);
- ymin = (GLint) (vert->win[1] - radius);
- ymax = (GLint) (vert->win[1] + radius);
- z = (GLint) (vert->win[2]);
-
- red = vert->color[0];
- green = vert->color[1];
- blue = vert->color[2];
-
- /* get texture coordinates */
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u]._ReallyEnabled) {
- if (vert->texcoord[u][3] != 1.0 && vert->texcoord[u][3] != 0.0) {
- texcoord[u][0] = vert->texcoord[u][0] / vert->texcoord[u][3];
- texcoord[u][1] = vert->texcoord[u][1] / vert->texcoord[u][3];
- texcoord[u][2] = vert->texcoord[u][2] / vert->texcoord[u][3];
- }
- else {
- texcoord[u][0] = vert->texcoord[u][0];
- texcoord[u][1] = vert->texcoord[u][1];
- texcoord[u][2] = vert->texcoord[u][2];
- }
- }
- }
+static const char *pntFuncName = NULL;
- for (y = ymin; y <= ymax; y++) {
- for (x = xmin; x <= xmax; x++) {
- const GLfloat dx = x + 0.5F - vert->win[0];
- const GLfloat dy = y + 0.5F - vert->win[1];
- const GLfloat dist2 = dx*dx + dy*dy;
- if (dist2 < rmax2) {
- alpha = vert->color[3];
- if (dist2 >= rmin2) {
- GLint coverage = (GLint) (256.0F - (dist2 - rmin2) * cscale);
- /* coverage is in [0,256] */
- alpha = (alpha * coverage) >> 8;
- }
- alpha = (GLint) (alpha * alphaf);
- if (ctx->Texture._MultiTextureEnabled) {
- PB_WRITE_MULTITEX_PIXEL( PB, x, y, z, fog,
- red, green, blue, alpha,
- texcoord );
- }
- else {
- PB_WRITE_TEX_PIXEL( PB, x,y,z, fog,
- red, green, blue, alpha,
- texcoord[0][0],
- texcoord[0][1],
- texcoord[0][2] );
- }
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- else {
- /* Not texture mapped */
- GLfloat radius, rmin, rmax, rmin2, rmax2, cscale, alphaf;
- GLint xmin, ymin, xmax, ymax;
- GLint x, y, z;
- GLfixed fog;
- GLint red, green, blue, alpha;
- GLfloat dsize = psize * dist;
-
- if (dsize >= ctx->Point.Threshold) {
- radius = MIN2(dsize, ctx->Point.MaxSize) * 0.5F;
- alphaf = 1.0F;
- }
- else {
- radius = (MAX2(ctx->Point.Threshold, ctx->Point.MinSize) * 0.5F);
- dsize /= ctx->Point.Threshold;
- alphaf = dsize * dsize;
- }
- rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
- rmax = radius + 0.7071F;
- rmin2 = MAX2(0.0, rmin * rmin);
- rmax2 = rmax * rmax;
- cscale = 256.0F / (rmax2 - rmin2);
-
- xmin = (GLint) (vert->win[0] - radius);
- xmax = (GLint) (vert->win[0] + radius);
- ymin = (GLint) (vert->win[1] - radius);
- ymax = (GLint) (vert->win[1] + radius);
- z = (GLint) (vert->win[2]);
-
- fog = FloatToFixed( vert->fog );
-
- red = vert->color[0];
- green = vert->color[1];
- blue = vert->color[2];
-
- for (y = ymin; y <= ymax; y++) {
- for (x = xmin; x <= xmax; x++) {
- const GLfloat dx = x + 0.5F - vert->win[0];
- const GLfloat dy = y + 0.5F - vert->win[1];
- const GLfloat dist2 = dx * dx + dy * dy;
- if (dist2 < rmax2) {
- alpha = vert->color[3];
- if (dist2 >= rmin2) {
- GLint coverage = (GLint) (256.0F - (dist2 - rmin2) * cscale);
- /* coverage is in [0,256] */
- alpha = (alpha * coverage) >> 8;
- }
- alpha = (GLint) (alpha * alphaf);
- PB_WRITE_RGBA_PIXEL(PB, x, y, z, fog,
- red, green, blue, alpha);
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
-}
+#define USE(pntFunc) \
+do { \
+ pntFuncName = #pntFunc; \
+ /*printf("%s\n", pntFuncName);*/ \
+ swrast->Point = pntFunc; \
+} while (0)
+#else
-#ifdef DEBUG
-void
-_mesa_print_point_function(GLcontext *ctx)
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
+#define USE(pntFunc) swrast->Point = pntFunc
- printf("Point Func == ");
- if (swrast->Point == size1_ci_point)
- printf("size1_ci_point\n");
- else if (swrast->Point == size1_rgba_point)
- printf("size1_rgba_point\n");
- else if (swrast->Point == general_ci_point)
- printf("general_ci_point\n");
- else if (swrast->Point == general_rgba_point)
- printf("general_rgba_point\n");
- else if (swrast->Point == textured_rgba_point)
- printf("textured_rgba_point\n");
- else if (swrast->Point == multitextured_rgba_point)
- printf("multitextured_rgba_point\n");
- else if (swrast->Point == antialiased_rgba_point)
- printf("antialiased_rgba_point\n");
- else if (swrast->Point == dist_atten_general_ci_point)
- printf("dist_atten_general_ci_point\n");
- else if (swrast->Point == dist_atten_general_rgba_point)
- printf("dist_atten_general_rgba_point\n");
- else if (swrast->Point == dist_atten_textured_rgba_point)
- printf("dist_atten_textured_rgba_point\n");
- else if (swrast->Point == dist_atten_antialiased_rgba_point)
- printf("dist_atten_antialiased_rgba_point\n");
- else if (!swrast->Point)
- printf("NULL\n");
- else
- printf("Driver func %p\n", swrast->Point);
-}
#endif
* Examine the current context to determine which point drawing function
* should be used.
*/
-void
+void
_swrast_choose_point( GLcontext *ctx )
{
SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLboolean rgbmode = ctx->Visual.RGBAflag;
+ GLboolean rgbMode = ctx->Visual.rgbMode;
if (ctx->RenderMode==GL_RENDER) {
- if (!ctx->Point._Attenuated) {
- if (ctx->Point.SmoothFlag && rgbmode) {
- swrast->Point = antialiased_rgba_point;
+ if (ctx->Point.PointSprite) {
+ /* GL_NV_point_sprite */
+ /* XXX this might not be good enough */
+ if (ctx->Point._Attenuated)
+ USE(atten_sprite_point);
+ else
+ USE(sprite_point);
+ }
+ else if (ctx->Point.SmoothFlag) {
+ /* Smooth points */
+ if (rgbMode) {
+ if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) {
+ USE(atten_antialiased_rgba_point);
+ }
+ else if (ctx->Texture._ReallyEnabled) {
+ USE(antialiased_tex_rgba_point);
+ }
+ else {
+ USE(antialiased_rgba_point);
+ }
}
- else if (ctx->Texture._ReallyEnabled) {
- if (ctx->Texture._MultiTextureEnabled ||
- ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR ||
- ctx->Fog.ColorSumEnabled) {
- swrast->Point = multitextured_rgba_point;
+ else {
+ USE(antialiased_ci_point);
+ }
+ }
+ else if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled) {
+ if (rgbMode) {
+ if (ctx->Texture._ReallyEnabled) {
+ if (ctx->Point.SmoothFlag) {
+ USE(atten_antialiased_rgba_point);
+ }
+ else {
+ USE(atten_textured_rgba_point);
+ }
}
else {
- swrast->Point = textured_rgba_point;
+ USE(atten_general_rgba_point);
}
}
- else if (ctx->Point.Size==1.0) {
- /* size=1, any raster ops */
- if (rgbmode)
- swrast->Point = size1_rgba_point;
- else
- swrast->Point = size1_ci_point;
+ else {
+ /* ci, atten */
+ USE(atten_general_ci_point);
+ }
+ }
+ else if (ctx->Texture._ReallyEnabled && rgbMode) {
+ /* textured */
+ USE(textured_rgba_point);
+ }
+ else if (ctx->Point.Size != 1.0) {
+ /* large points */
+ if (rgbMode) {
+ USE(general_rgba_point);
}
else {
- /* every other kind of point rendering */
- if (rgbmode)
- swrast->Point = general_rgba_point;
- else
- swrast->Point = general_ci_point;
+ USE(general_ci_point);
}
- }
- else if(ctx->Point.SmoothFlag && rgbmode) {
- swrast->Point = dist_atten_antialiased_rgba_point;
}
- else if (ctx->Texture._ReallyEnabled) {
- swrast->Point = dist_atten_textured_rgba_point;
- }
else {
- /* every other kind of point rendering */
- if (rgbmode)
- swrast->Point = dist_atten_general_rgba_point;
- else
- swrast->Point = dist_atten_general_ci_point;
- }
+ /* single pixel points */
+ if (rgbMode) {
+ USE(size1_rgba_point);
+ }
+ else {
+ USE(size1_ci_point);
+ }
+ }
}
else if (ctx->RenderMode==GL_FEEDBACK) {
- swrast->Point = gl_feedback_point;
+ USE(_mesa_feedback_point);
}
else {
/* GL_SELECT mode */
- swrast->Point = gl_select_point;
+ USE(_mesa_select_point);
}
-
- /*_mesa_print_points_function(ctx);*/
}
-
projects / mesa.git / blobdiff