-/* $Id: points.c,v 1.2 1999/09/18 20:41:23 keithw Exp $ */
+/**
+ * \file points.c
+ * Point operations.
+ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
+ * Version: 6.5
+ *
+ * Copyright (C) 1999-2005 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
*/
-
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
+#include "glheader.h"
#include "context.h"
-#include "feedback.h"
#include "macros.h"
-#include "pb.h"
-#include "span.h"
+#include "points.h"
#include "texstate.h"
-#include "types.h"
-#include "vb.h"
-#include "mmath.h"
-#ifdef XFree86Server
-#include "GL/xf86glx.h"
-#endif
-#endif
-
+#include "mtypes.h"
-void gl_PointSize( GLcontext *ctx, GLfloat size )
+/**
+ * Set current point size.
+ * \param size point diameter in pixels
+ * \sa glPointSize().
+ */
+void GLAPIENTRY
+_mesa_PointSize( GLfloat size )
{
- if (size<=0.0) {
- gl_error( ctx, GL_INVALID_VALUE, "glPointSize" );
- return;
- }
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPointSize");
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
- if (ctx->Point.Size != size) {
- ctx->Point.Size = size;
- ctx->TriangleCaps &= ~DD_POINT_SIZE;
- if (size != 1.0) ctx->TriangleCaps |= DD_POINT_SIZE;
- ctx->NewState |= NEW_RASTER_OPS;
+ if (size <= 0.0) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glPointSize" );
+ return;
}
-}
-
+ if (ctx->Point.Size == size)
+ return;
-void gl_PointParameterfvEXT( GLcontext *ctx, GLenum pname,
- const GLfloat *params)
-{
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPointParameterfvEXT");
- if(pname==GL_DISTANCE_ATTENUATION_EXT) {
- GLboolean tmp = ctx->Point.Attenuated;
- COPY_3V(ctx->Point.Params,params);
- ctx->Point.Attenuated = (params[0] != 1.0 ||
- params[1] != 0.0 ||
- params[2] != 0.0);
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.Size = size;
- if (tmp != ctx->Point.Attenuated) {
- ctx->Enabled ^= ENABLE_POINT_ATTEN;
- ctx->TriangleCaps ^= DD_POINT_ATTEN;
- ctx->NewState |= NEW_RASTER_OPS;
- }
- } else {
- if (*params<0.0 ) {
- gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
- return;
- }
- switch (pname) {
- case GL_POINT_SIZE_MIN_EXT:
- ctx->Point.MinSize=*params;
- break;
- case GL_POINT_SIZE_MAX_EXT:
- ctx->Point.MaxSize=*params;
- break;
- case GL_POINT_FADE_THRESHOLD_SIZE_EXT:
- ctx->Point.Threshold=*params;
- break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glPointParameterfvEXT" );
- return;
- }
- }
- ctx->NewState |= NEW_RASTER_OPS;
+ if (ctx->Driver.PointSize)
+ ctx->Driver.PointSize(ctx, size);
}
-/**********************************************************************/
-/***** Rasterization *****/
-/**********************************************************************/
-
+#if _HAVE_FULL_GL
/*
- * 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)
- *
- * All point rendering functions take the same two arguments: first and
- * last which specify that the points specified by VB[first] through
- * VB[last] are to be rendered.
+ * Added by GL_NV_point_sprite
*/
-
-
-
+void GLAPIENTRY
+_mesa_PointParameteriNV( GLenum pname, GLint param )
+{
+ const GLfloat value = (GLfloat) param;
+ _mesa_PointParameterfvEXT(pname, &value);
+}
/*
- * CI points with size == 1.0
+ * Added by GL_NV_point_sprite
*/
-void size1_ci_points( GLcontext *ctx, GLuint first, GLuint last )
+void GLAPIENTRY
+_mesa_PointParameterivNV( GLenum pname, const GLint *params )
{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLfloat *win;
- GLint *pbx = PB->x, *pby = PB->y;
- GLdepth *pbz = PB->z;
- GLuint *pbi = PB->i;
- GLuint pbcount = PB->count;
- GLuint i;
-
- win = &VB->Win.data[first][0];
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- pbx[pbcount] = (GLint) win[0];
- pby[pbcount] = (GLint) win[1];
- pbz[pbcount] = (GLint) (win[2] + ctx->PointZoffset);
- pbi[pbcount] = VB->IndexPtr->data[i];
- pbcount++;
- }
- win += 3;
- }
- PB->count = pbcount;
- PB_CHECK_FLUSH(ctx, PB);
+ const GLfloat value = (GLfloat) params[0];
+ _mesa_PointParameterfvEXT(pname, &value);
}
/*
- * RGBA points with size == 1.0
+ * Same for both GL_EXT_point_parameters and GL_ARB_point_parameters.
*/
-static void size1_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
+void GLAPIENTRY
+_mesa_PointParameterfEXT( GLenum pname, GLfloat param)
{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x, y, z;
- GLint red, green, blue, alpha;
-
- x = (GLint) VB->Win.data[i][0];
- y = (GLint) VB->Win.data[i][1];
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
- alpha = VB->ColorPtr->data[i][3];
-
- PB_WRITE_RGBA_PIXEL( PB, x, y, z, red, green, blue, alpha );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
+ _mesa_PointParameterfvEXT(pname, ¶m);
}
/*
- * General CI points.
+ * Same for both GL_EXT_point_parameters and GL_ARB_point_parameters.
*/
-static void general_ci_points( GLcontext *ctx, GLuint first, GLuint last )
+void GLAPIENTRY
+_mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params)
{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
- GLint isize = (GLint) (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
- GLint radius = isize >> 1;
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x, y, z;
- GLint x0, x1, y0, y1;
- GLint ix, iy;
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
- x = (GLint) VB->Win.data[i][0];
- y = (GLint) VB->Win.data[i][1];
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
+ switch (pname) {
+ case GL_DISTANCE_ATTENUATION_EXT:
+ if (ctx->Extensions.EXT_point_parameters) {
+ if (TEST_EQ_3V(ctx->Point.Params, params))
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ COPY_3V(ctx->Point.Params, params);
}
else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
}
-
- PB_SET_INDEX( ctx, PB, VB->IndexPtr->data[i] );
-
- for (iy=y0;iy<=y1;iy++) {
- for (ix=x0;ix<=x1;ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z );
+ break;
+ case GL_POINT_SIZE_MIN_EXT:
+ if (ctx->Extensions.EXT_point_parameters) {
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
+ return;
}
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-
-/*
- * General RGBA points.
- */
-static void general_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
- GLint isize = (GLint) (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
- GLint radius = isize >> 1;
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x, y, z;
- GLint x0, x1, y0, y1;
- GLint ix, iy;
-
- x = (GLint) VB->Win.data[i][0];
- y = (GLint) VB->Win.data[i][1];
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
+ if (ctx->Point.MinSize == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.MinSize = params[0];
}
else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
}
-
- PB_SET_COLOR( ctx, PB,
- VB->ColorPtr->data[i][0],
- VB->ColorPtr->data[i][1],
- VB->ColorPtr->data[i][2],
- VB->ColorPtr->data[i][3] );
-
- for (iy=y0;iy<=y1;iy++) {
- for (ix=x0;ix<=x1;ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z );
+ break;
+ case GL_POINT_SIZE_MAX_EXT:
+ if (ctx->Extensions.EXT_point_parameters) {
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
+ return;
}
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-
-
-
-/*
- * Textured RGBA points.
- */
-static void textured_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x, y, z;
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
- GLint red, green, blue, alpha;
- GLfloat s, t, u;
-
- x = (GLint) VB->Win.data[i][0];
- y = (GLint) VB->Win.data[i][1];
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- isize = (GLint)
- (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
- 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;
+ if (ctx->Point.MaxSize == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.MaxSize = params[0];
}
else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
}
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
- alpha = VB->ColorPtr->data[i][3];
-
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- s = VB->TexCoordPtr[0]->data[i][0]/VB->TexCoordPtr[0]->data[i][3];
- t = VB->TexCoordPtr[0]->data[i][1]/VB->TexCoordPtr[0]->data[i][3];
- u = VB->TexCoordPtr[0]->data[i][2]/VB->TexCoordPtr[0]->data[i][3];
- break;
- case 3:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = VB->TexCoordPtr[0]->data[i][2];
- break;
- case 2:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = 0.0;
- break;
- case 1:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = 0.0;
- u = 0.0;
- break;
- }
-
-
-
-
-/* don't think this is needed
- PB_SET_COLOR( red, green, blue, alpha );
-*/
-
- for (iy=y0;iy<=y1;iy++) {
- for (ix=x0;ix<=x1;ix++) {
- PB_WRITE_TEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u );
+ break;
+ case GL_POINT_FADE_THRESHOLD_SIZE_EXT:
+ if (ctx->Extensions.EXT_point_parameters) {
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
+ return;
}
+ if (ctx->Point.Threshold == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.Threshold = params[0];
}
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-
-/*
- * Multitextured RGBA points.
- */
-static void multitextured_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x, y, z;
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
- GLint red, green, blue, alpha;
- GLfloat s, t, u;
- GLfloat s1, t1, u1;
-
- x = (GLint) VB->Win.data[i][0];
- y = (GLint) VB->Win.data[i][1];
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- isize = (GLint)
- (CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE) + 0.5F);
- if (isize<1) {
- isize = 1;
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
}
- radius = isize >> 1;
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
+ break;
+ case GL_POINT_SPRITE_R_MODE_NV:
+ /* This is one area where ARB_point_sprite and NV_point_sprite
+ * differ. In ARB_point_sprite the POINT_SPRITE_R_MODE is
+ * always ZERO. NV_point_sprite adds the S and R modes.
+ */
+ if (ctx->Extensions.NV_point_sprite) {
+ GLenum value = (GLenum) params[0];
+ if (value != GL_ZERO && value != GL_S && value != GL_R) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)");
+ return;
+ }
+ if (ctx->Point.SpriteRMode == value)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.SpriteRMode = value;
}
else {
- /* even size */
- x0 = (GLint) (x + 1.5F) - radius;
- x1 = x0 + isize - 1;
- y0 = (GLint) (y + 1.5F) - radius;
- y1 = y0 + isize - 1;
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
}
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
- alpha = VB->ColorPtr->data[i][3];
-
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- s = VB->TexCoordPtr[0]->data[i][0]/VB->TexCoordPtr[0]->data[i][3];
- t = VB->TexCoordPtr[0]->data[i][1]/VB->TexCoordPtr[0]->data[i][3];
- u = VB->TexCoordPtr[0]->data[i][2]/VB->TexCoordPtr[0]->data[i][3];
- break;
- case 3:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = VB->TexCoordPtr[0]->data[i][2];
- break;
- case 2:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = 0.0;
- break;
- case 1:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = 0.0;
- u = 0.0;
- break;
- }
-
- switch (VB->TexCoordPtr[1]->size) {
- case 4:
- s1 = VB->TexCoordPtr[1]->data[i][0]/VB->TexCoordPtr[1]->data[i][3];
- t1 = VB->TexCoordPtr[1]->data[i][1]/VB->TexCoordPtr[1]->data[i][3];
- u1 = VB->TexCoordPtr[1]->data[i][2]/VB->TexCoordPtr[1]->data[i][3];
- break;
- case 3:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = VB->TexCoordPtr[1]->data[i][1];
- u1 = VB->TexCoordPtr[1]->data[i][2];
- break;
- case 2:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = VB->TexCoordPtr[1]->data[i][1];
- u1 = 0.0;
- break;
- case 1:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = 0.0;
- u1 = 0.0;
- break;
- }
-
- for (iy=y0;iy<=y1;iy++) {
- for (ix=x0;ix<=x1;ix++) {
- PB_WRITE_MULTITEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u, s1, t1, u1 );
+ break;
+ case GL_POINT_SPRITE_COORD_ORIGIN:
+ if (ctx->Extensions.ARB_point_sprite) {
+ GLenum value = (GLenum) params[0];
+ if (value != GL_LOWER_LEFT && value != GL_UPPER_LEFT) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)");
+ return;
}
+ if (ctx->Point.SpriteOrigin == value)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.SpriteOrigin = value;
}
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-
-
-
-/*
- * Antialiased points with or without texture mapping.
- */
-static void antialiased_rgba_points( GLcontext *ctx,
- GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
- GLfloat radius, rmin, rmax, rmin2, rmax2, cscale;
-
- radius = CLAMP( ctx->Point.Size, MIN_POINT_SIZE, MAX_POINT_SIZE ) * 0.5F;
- rmin = radius - 0.7071F; /* 0.7071 = sqrt(2)/2 */
- rmax = radius + 0.7071F;
- rmin2 = rmin*rmin;
- rmax2 = rmax*rmax;
- cscale = 256.0F / (rmax2-rmin2);
-
- if (ctx->Texture.ReallyEnabled) {
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint xmin, ymin, xmax, ymax;
- GLint x, y, z;
- GLint red, green, blue, alpha;
- GLfloat s, t, u;
- GLfloat s1, t1, u1;
-
- xmin = (GLint) (VB->Win.data[i][0] - radius);
- xmax = (GLint) (VB->Win.data[i][0] + radius);
- ymin = (GLint) (VB->Win.data[i][1] - radius);
- ymax = (GLint) (VB->Win.data[i][1] + radius);
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
-
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- s = (VB->TexCoordPtr[0]->data[i][0]/
- VB->TexCoordPtr[0]->data[i][3]);
- t = (VB->TexCoordPtr[0]->data[i][1]/
- VB->TexCoordPtr[0]->data[i][3]);
- u = (VB->TexCoordPtr[0]->data[i][2]/
- VB->TexCoordPtr[0]->data[i][3]);
- break;
- case 3:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = VB->TexCoordPtr[0]->data[i][2];
- break;
- case 2:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = 0.0;
- break;
- case 1:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = 0.0;
- u = 0.0;
- break;
- }
-
- if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
- /* Multitextured! This is probably a slow enough path that
- there's no reason to specialize the multitexture case. */
- switch (VB->TexCoordPtr[1]->size) {
- case 4:
- s1 = ( VB->TexCoordPtr[1]->data[i][0] /
- VB->TexCoordPtr[1]->data[i][3]);
- t1 = ( VB->TexCoordPtr[1]->data[i][1] /
- VB->TexCoordPtr[1]->data[i][3]);
- u1 = ( VB->TexCoordPtr[1]->data[i][2] /
- VB->TexCoordPtr[1]->data[i][3]);
- break;
- case 3:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = VB->TexCoordPtr[1]->data[i][1];
- u1 = VB->TexCoordPtr[1]->data[i][2];
- break;
- case 2:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = VB->TexCoordPtr[1]->data[i][1];
- u1 = 0.0;
- break;
- case 1:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = 0.0;
- u1 = 0.0;
- break;
- }
- }
-
- for (y=ymin;y<=ymax;y++) {
- for (x=xmin;x<=xmax;x++) {
- GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
- GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
- GLfloat dist2 = dx*dx + dy*dy;
- if (dist2<rmax2) {
- alpha = VB->ColorPtr->data[i][3];
- if (dist2>=rmin2) {
- GLint coverage = (GLint) (256.0F-(dist2-rmin2)*cscale);
- /* coverage is in [0,256] */
- alpha = (alpha * coverage) >> 8;
- }
- if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
- PB_WRITE_MULTITEX_PIXEL( PB, x,y,z, red, green, blue,
- alpha, s, t, u, s1, t1, u1 );
- } else {
- PB_WRITE_TEX_PIXEL( PB, x,y,z, red, green, blue,
- alpha, s, t, u );
- }
- }
- }
- }
-
- PB_CHECK_FLUSH(ctx,PB);
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
}
- }
- }
- else {
- /* Not texture mapped */
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint xmin, ymin, xmax, ymax;
- GLint x, y, z;
- GLint red, green, blue, alpha;
-
- xmin = (GLint) (VB->Win.data[i][0] - radius);
- xmax = (GLint) (VB->Win.data[i][0] + radius);
- ymin = (GLint) (VB->Win.data[i][1] - radius);
- ymax = (GLint) (VB->Win.data[i][1] + radius);
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
-
- for (y=ymin;y<=ymax;y++) {
- for (x=xmin;x<=xmax;x++) {
- GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
- GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
- GLfloat dist2 = dx*dx + dy*dy;
- if (dist2<rmax2) {
- alpha = VB->ColorPtr->data[i][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, red, green, blue,
- alpha );
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
- }
-}
-
-
-
-/*
- * Null rasterizer for measuring transformation speed.
- */
-static void null_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- (void) ctx;
- (void) first;
- (void) last;
-}
-
-
-
-/* Definition of the functions for GL_EXT_point_parameters */
-
-/* Calculates the distance attenuation formula of a vector of points in
- * eye space coordinates
- */
-static void dist3(GLfloat *out, GLuint first, GLuint last,
- const GLcontext *ctx, const GLvector4f *v)
-{
- GLuint stride = v->stride;
- GLfloat *p = VEC_ELT(v, GLfloat, first);
- GLuint i;
-
- for (i = first ; i <= last ; i++, STRIDE_F(p, stride) )
- {
- GLfloat dist = GL_SQRT(p[0]*p[0]+p[1]*p[1]+p[2]*p[2]);
- out[i] = 1/(ctx->Point.Params[0]+
- dist * (ctx->Point.Params[1] +
- dist * ctx->Point.Params[2]));
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)" );
+ return;
}
-}
-static void dist2(GLfloat *out, GLuint first, GLuint last,
- const GLcontext *ctx, const GLvector4f *v)
-{
- GLuint stride = v->stride;
- GLfloat *p = VEC_ELT(v, GLfloat, first);
- GLuint i;
-
- for (i = first ; i <= last ; i++, STRIDE_F(p, stride) )
- {
- GLfloat dist = GL_SQRT(p[0]*p[0]+p[1]*p[1]);
- out[i] = 1/(ctx->Point.Params[0]+
- dist * (ctx->Point.Params[1] +
- dist * ctx->Point.Params[2]));
- }
+ if (ctx->Driver.PointParameterfv)
+ (*ctx->Driver.PointParameterfv)(ctx, pname, params);
}
-
-
-typedef void (*dist_func)(GLfloat *out, GLuint first, GLuint last,
- const GLcontext *ctx, const GLvector4f *v);
-
-
-static dist_func eye_dist_tab[5] = {
- 0,
- 0,
- dist2,
- dist3,
- dist3
-};
-
-
-static void clip_dist(GLfloat *out, GLuint first, GLuint last,
- const GLcontext *ctx, GLvector4f *clip)
-{
- /* this is never called */
- gl_problem(NULL, "clip_dist() called - dead code!\n");
-
- (void) out;
- (void) first;
- (void) last;
- (void) ctx;
- (void) clip;
-
-#if 0
- GLuint i;
- const GLfloat *from = (GLfloat *)clip_vec->start;
- const GLuint stride = clip_vec->stride;
-
- for (i = first ; i <= last ; i++ )
- {
- GLfloat dist = win[i][2];
- out[i] = 1/(ctx->Point.Params[0]+
- dist * (ctx->Point.Params[1] +
- dist * ctx->Point.Params[2]));
- }
#endif
-}
-/*
- * Distance Attenuated General CI points.
+/**
+ * Update derived point-related state.
*/
-static void dist_atten_general_ci_points( GLcontext *ctx, GLuint first,
- GLuint last )
+void
+_mesa_update_point(GLcontext *ctx)
{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
- GLfloat psize,dsize;
- GLfloat dist[VB_SIZE];
- psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
-
- if (ctx->NeedEyeCoords)
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
- else
- clip_dist( dist, first, last, ctx, VB->ClipPtr );
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x, y, z;
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
-
- x = (GLint) VB->Win.data[i][0];
- y = (GLint) VB->Win.data[i][1];
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- dsize=psize*dist[i];
- 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;
- }
-
- PB_SET_INDEX( ctx, PB, VB->IndexPtr->data[i] );
-
- for (iy=y0;iy<=y1;iy++) {
- for (ix=x0;ix<=x1;ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-/*
- * Distance Attenuated General RGBA points.
- */
-static void dist_atten_general_rgba_points( GLcontext *ctx, GLuint first,
- GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
- GLubyte alpha;
- GLfloat psize,dsize;
- GLfloat dist[VB_SIZE];
- psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
-
- if (ctx->NeedEyeCoords)
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
- else
- clip_dist( dist, first, last, ctx, VB->ClipPtr );
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x, y, z;
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
-
- x = (GLint) VB->Win.data[i][0];
- y = (GLint) VB->Win.data[i][1];
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- dsize=psize*dist[i];
- if (dsize >= ctx->Point.Threshold) {
- isize = (GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
- alpha = VB->ColorPtr->data[i][3];
- }
- else {
- isize = (GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
- dsize /= ctx->Point.Threshold;
- alpha = (GLint) (VB->ColorPtr->data[i][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( ctx, PB,
- VB->ColorPtr->data[i][0],
- VB->ColorPtr->data[i][1],
- VB->ColorPtr->data[i][2],
- alpha );
-
- for (iy=y0;iy<=y1;iy++) {
- for (ix=x0;ix<=x1;ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
+ /* clamp to user-specified limits now, clamp to ctx->Const.Min/Max
+ * limits during rasterization.
+ */
+ ctx->Point._Size = CLAMP(ctx->Point.Size,
+ ctx->Point.MinSize,
+ ctx->Point.MaxSize);
+
+ if (ctx->Point._Size == 1.0F)
+ ctx->_TriangleCaps &= ~DD_POINT_SIZE;
+ else
+ ctx->_TriangleCaps |= DD_POINT_SIZE;
+
+ ctx->Point._Attenuated = (ctx->Point.Params[0] != 1.0 ||
+ ctx->Point.Params[1] != 0.0 ||
+ ctx->Point.Params[2] != 0.0);
+
+ if (ctx->Point._Attenuated)
+ ctx->_TriangleCaps |= DD_POINT_ATTEN;
+ else
+ ctx->_TriangleCaps &= ~DD_POINT_ATTEN;
}
-/*
- * Distance Attenuated Textured RGBA points.
- */
-static void dist_atten_textured_rgba_points( GLcontext *ctx, GLuint first,
- GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLuint i;
- GLfloat psize,dsize;
- GLfloat dist[VB_SIZE];
- psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
-
- if (ctx->NeedEyeCoords)
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
- else
- clip_dist( dist, first, last, ctx, VB->ClipPtr );
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x, y, z;
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
- GLint red, green, blue, alpha;
- GLfloat s, t, u;
- GLfloat s1, t1, u1;
- x = (GLint) VB->Win.data[i][0];
- y = (GLint) VB->Win.data[i][1];
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- dsize=psize*dist[i];
- if(dsize>=ctx->Point.Threshold) {
- isize=(GLint) (MIN2(dsize,ctx->Point.MaxSize)+0.5F);
- alpha=VB->ColorPtr->data[i][3];
- } else {
- isize=(GLint) (MAX2(ctx->Point.Threshold,ctx->Point.MinSize)+0.5F);
- dsize/=ctx->Point.Threshold;
- alpha = (GLint) (VB->ColorPtr->data[i][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;
- }
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
-
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- s = (VB->TexCoordPtr[0]->data[i][0]/
- VB->TexCoordPtr[0]->data[i][3]);
- t = (VB->TexCoordPtr[0]->data[i][1]/
- VB->TexCoordPtr[0]->data[i][3]);
- u = (VB->TexCoordPtr[0]->data[i][2]/
- VB->TexCoordPtr[0]->data[i][3]);
- break;
- case 3:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = VB->TexCoordPtr[0]->data[i][2];
- break;
- case 2:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = 0.0;
- break;
- case 1:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = 0.0;
- u = 0.0;
- break;
- }
-
- if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
- /* Multitextured! This is probably a slow enough path that
- there's no reason to specialize the multitexture case. */
- switch (VB->TexCoordPtr[1]->size) {
- case 4:
- s1 = ( VB->TexCoordPtr[1]->data[i][0] /
- VB->TexCoordPtr[1]->data[i][3] );
- t1 = ( VB->TexCoordPtr[1]->data[i][1] /
- VB->TexCoordPtr[1]->data[i][3] );
- u1 = ( VB->TexCoordPtr[1]->data[i][2] /
- VB->TexCoordPtr[1]->data[i][3] );
- break;
- case 3:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = VB->TexCoordPtr[1]->data[i][1];
- u1 = VB->TexCoordPtr[1]->data[i][2];
- break;
- case 2:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = VB->TexCoordPtr[1]->data[i][1];
- u1 = 0.0;
- break;
- case 1:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = 0.0;
- u1 = 0.0;
- break;
- }
- }
-
-/* don't think this is needed
- PB_SET_COLOR( red, green, blue, alpha );
-*/
-
- for (iy=y0;iy<=y1;iy++) {
- for (ix=x0;ix<=x1;ix++) {
- if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
- PB_WRITE_MULTITEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u, s1, t1, u1 );
- } else {
- PB_WRITE_TEX_PIXEL( PB, ix, iy, z, red, green, blue, alpha, s, t, u );
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-/*
- * Distance Attenuated Antialiased points with or without texture mapping.
+/**
+ * Initialize the context point state.
+ *
+ * \param ctx GL context.
+ *
+ * Initializes __GLcontextRec::Point and point related constants in
+ * __GLcontextRec::Const.
*/
-static void dist_atten_antialiased_rgba_points( GLcontext *ctx,
- GLuint first, GLuint last )
+void
+_mesa_init_point(GLcontext *ctx)
{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
GLuint i;
- GLfloat radius, rmin, rmax, rmin2, rmax2, cscale;
- GLfloat psize,dsize,alphaf;
- GLfloat dist[VB_SIZE];
- psize=CLAMP(ctx->Point.Size,MIN_POINT_SIZE,MAX_POINT_SIZE);
-
- if (ctx->NeedEyeCoords)
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
- else
- clip_dist( dist, first, last, ctx, VB->ClipPtr );
-
- if (ctx->Texture.ReallyEnabled) {
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint xmin, ymin, xmax, ymax;
- GLint x, y, z;
- GLint red, green, blue, alpha;
- GLfloat s, t, u;
- GLfloat s1, t1, u1;
-
- dsize=psize*dist[i];
- if(dsize>=ctx->Point.Threshold) {
- radius=(MIN2(dsize,ctx->Point.MaxSize)*0.5F);
- alphaf=1.0;
- } 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 = rmin*rmin;
- rmax2 = rmax*rmax;
- cscale = 256.0F / (rmax2-rmin2);
-
- xmin = (GLint) (VB->Win.data[i][0] - radius);
- xmax = (GLint) (VB->Win.data[i][0] + radius);
- ymin = (GLint) (VB->Win.data[i][1] - radius);
- ymax = (GLint) (VB->Win.data[i][1] + radius);
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
-
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- s = (VB->TexCoordPtr[0]->data[i][0]/
- VB->TexCoordPtr[0]->data[i][3]);
- t = (VB->TexCoordPtr[0]->data[i][1]/
- VB->TexCoordPtr[0]->data[i][3]);
- u = (VB->TexCoordPtr[0]->data[i][2]/
- VB->TexCoordPtr[0]->data[i][3]);
- break;
- case 3:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = VB->TexCoordPtr[0]->data[i][2];
- break;
- case 2:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = VB->TexCoordPtr[0]->data[i][1];
- u = 0.0;
- break;
- case 1:
- s = VB->TexCoordPtr[0]->data[i][0];
- t = 0.0;
- u = 0.0;
- break;
- }
-
- if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
- /* Multitextured! This is probably a slow enough path that
- there's no reason to specialize the multitexture case. */
- switch (VB->TexCoordPtr[1]->size) {
- case 4:
- s1 = ( VB->TexCoordPtr[1]->data[i][0] /
- VB->TexCoordPtr[1]->data[i][3] );
- t1 = ( VB->TexCoordPtr[1]->data[i][1] /
- VB->TexCoordPtr[1]->data[i][3] );
- u1 = ( VB->TexCoordPtr[1]->data[i][2] /
- VB->TexCoordPtr[1]->data[i][3] );
- break;
- case 3:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = VB->TexCoordPtr[1]->data[i][1];
- u1 = VB->TexCoordPtr[1]->data[i][2];
- break;
- case 2:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = VB->TexCoordPtr[1]->data[i][1];
- u1 = 0.0;
- break;
- case 1:
- s1 = VB->TexCoordPtr[1]->data[i][0];
- t1 = 0.0;
- u1 = 0.0;
- break;
- }
- }
-
- for (y=ymin;y<=ymax;y++) {
- for (x=xmin;x<=xmax;x++) {
- GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
- GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
- GLfloat dist2 = dx*dx + dy*dy;
- if (dist2<rmax2) {
- alpha = VB->ColorPtr->data[i][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.ReallyEnabled >= TEXTURE1_1D) {
- PB_WRITE_MULTITEX_PIXEL( PB, x,y,z, red, green, blue, alpha, s, t, u, s1, t1, u1 );
- } else {
- PB_WRITE_TEX_PIXEL( PB, x,y,z, red, green, blue, alpha, s, t, u );
- }
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
- }
- else {
- /* Not texture mapped */
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint xmin, ymin, xmax, ymax;
- GLint x, y, z;
- GLint red, green, blue, alpha;
-
- dsize=psize*dist[i];
- if(dsize>=ctx->Point.Threshold) {
- radius=(MIN2(dsize,ctx->Point.MaxSize)*0.5F);
- alphaf=1.0;
- } 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 = rmin*rmin;
- rmax2 = rmax*rmax;
- cscale = 256.0F / (rmax2-rmin2);
-
- xmin = (GLint) (VB->Win.data[i][0] - radius);
- xmax = (GLint) (VB->Win.data[i][0] + radius);
- ymin = (GLint) (VB->Win.data[i][1] - radius);
- ymax = (GLint) (VB->Win.data[i][1] + radius);
- z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- red = VB->ColorPtr->data[i][0];
- green = VB->ColorPtr->data[i][1];
- blue = VB->ColorPtr->data[i][2];
-
- for (y=ymin;y<=ymax;y++) {
- for (x=xmin;x<=xmax;x++) {
- GLfloat dx = x/*+0.5F*/ - VB->Win.data[i][0];
- GLfloat dy = y/*+0.5F*/ - VB->Win.data[i][1];
- GLfloat dist2 = dx*dx + dy*dy;
- if (dist2<rmax2) {
- alpha = VB->ColorPtr->data[i][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, red, green, blue, alpha )
- ;
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
- }
-}
-
-
-/*
- * Examine the current context to determine which point drawing function
- * should be used.
- */
-void gl_set_point_function( GLcontext *ctx )
-{
- GLboolean rgbmode = ctx->Visual->RGBAflag;
-
- if (ctx->RenderMode==GL_RENDER) {
- if (ctx->NoRaster) {
- ctx->Driver.PointsFunc = null_points;
- return;
- }
- if (ctx->Driver.PointsFunc) {
- /* Device driver will draw points. */
- ctx->IndirectTriangles &= ~DD_POINT_SW_RASTERIZE;
- return;
- }
-
- if (!ctx->Point.Attenuated) {
- if (ctx->Point.SmoothFlag && rgbmode) {
- ctx->Driver.PointsFunc = antialiased_rgba_points;
- }
- else if (ctx->Texture.ReallyEnabled) {
- if (ctx->Texture.ReallyEnabled >= TEXTURE1_1D) {
- ctx->Driver.PointsFunc = multitextured_rgba_points;
- }
- else {
- ctx->Driver.PointsFunc = textured_rgba_points;
- }
- }
- else if (ctx->Point.Size==1.0) {
- /* size=1, any raster ops */
- if (rgbmode)
- ctx->Driver.PointsFunc = size1_rgba_points;
- else
- ctx->Driver.PointsFunc = size1_ci_points;
- }
- else {
- /* every other kind of point rendering */
- if (rgbmode)
- ctx->Driver.PointsFunc = general_rgba_points;
- else
- ctx->Driver.PointsFunc = general_ci_points;
- }
- }
- else if(ctx->Point.SmoothFlag && rgbmode) {
- ctx->Driver.PointsFunc = dist_atten_antialiased_rgba_points;
- }
- else if (ctx->Texture.ReallyEnabled) {
- ctx->Driver.PointsFunc = dist_atten_textured_rgba_points;
- }
- else {
- /* every other kind of point rendering */
- if (rgbmode)
- ctx->Driver.PointsFunc = dist_atten_general_rgba_points;
- else
- ctx->Driver.PointsFunc = dist_atten_general_ci_points;
- }
+ ctx->Point.SmoothFlag = GL_FALSE;
+ ctx->Point.Size = 1.0;
+ ctx->Point._Size = 1.0;
+ ctx->Point.Params[0] = 1.0;
+ ctx->Point.Params[1] = 0.0;
+ ctx->Point.Params[2] = 0.0;
+ ctx->Point._Attenuated = GL_FALSE;
+ ctx->Point.MinSize = 0.0;
+ ctx->Point.MaxSize
+ = MAX2(ctx->Const.MaxPointSize, ctx->Const.MaxPointSizeAA);
+ ctx->Point.Threshold = 1.0;
+ ctx->Point.PointSprite = GL_FALSE; /* GL_ARB/NV_point_sprite */
+ ctx->Point.SpriteRMode = GL_ZERO; /* GL_NV_point_sprite (only!) */
+ ctx->Point.SpriteOrigin = GL_UPPER_LEFT; /* GL_ARB_point_sprite */
+ for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
+ ctx->Point.CoordReplace[i] = GL_FALSE; /* GL_ARB/NV_point_sprite */
}
- else if (ctx->RenderMode==GL_FEEDBACK) {
- ctx->Driver.PointsFunc = gl_feedback_points;
- }
- else {
- /* GL_SELECT mode */
- ctx->Driver.PointsFunc = gl_select_points;
- }
-
}
-
projects / mesa.git / blobdiff