-/* $Id: points.c,v 1.18 2000/10/30 13:32:01 keithw Exp $ */
+/**
+ * \file points.c
+ * Point operations.
+ */
/*
* Mesa 3-D graphics library
- * Version: 3.4
- *
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
- *
+ *
+ * Copyright (C) 1999-2007 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
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
*/
-#ifdef PC_HEADER
-#include "all.h"
-#else
#include "glheader.h"
#include "context.h"
-#include "feedback.h"
#include "macros.h"
-#include "mmath.h"
-#include "pb.h"
#include "points.h"
-#include "span.h"
-#include "texstate.h"
-#include "types.h"
-#include "vb.h"
-#endif
+#include "mtypes.h"
-
-void
+/**
+ * Set current point size.
+ * \param size point diameter in pixels
+ * \sa glPointSize().
+ */
+void GLAPIENTRY
_mesa_PointSize( GLfloat size )
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPointSize");
- if (size <= 0.0) {
- gl_error( ctx, GL_INVALID_VALUE, "glPointSize" );
+ if (size <= 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glPointSize" );
return;
}
- if (ctx->Point.UserSize != size) {
- ctx->Point.UserSize = size;
- ctx->Point.Size = CLAMP(size, ctx->Const.MinPointSize, ctx->Const.MaxPointSize);
- ctx->TriangleCaps &= ~DD_POINT_SIZE;
- if (size != 1.0)
- ctx->TriangleCaps |= DD_POINT_SIZE;
- ctx->NewState |= _NEW_POINT;
- }
+ if (ctx->Point.Size == size)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.Size = size;
+
+ if (ctx->Driver.PointSize)
+ ctx->Driver.PointSize(ctx, size);
}
+void GLAPIENTRY
+_mesa_PointParameteri( GLenum pname, GLint param )
+{
+ GLfloat p[3];
+ p[0] = (GLfloat) param;
+ p[1] = p[2] = 0.0F;
+ _mesa_PointParameterfv(pname, p);
+}
-void
-_mesa_PointParameterfEXT( GLenum pname, GLfloat param)
+
+void GLAPIENTRY
+_mesa_PointParameteriv( GLenum pname, const GLint *params )
{
- _mesa_PointParameterfvEXT(pname, ¶m);
+ GLfloat p[3];
+ p[0] = (GLfloat) params[0];
+ if (pname == GL_DISTANCE_ATTENUATION_EXT) {
+ p[1] = (GLfloat) params[1];
+ p[2] = (GLfloat) params[2];
+ }
+ _mesa_PointParameterfv(pname, p);
}
-void
-_mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params)
+void GLAPIENTRY
+_mesa_PointParameterf( GLenum pname, GLfloat param)
+{
+ GLfloat p[3];
+ p[0] = param;
+ p[1] = p[2] = 0.0F;
+ _mesa_PointParameterfv(pname, p);
+}
+
+
+void GLAPIENTRY
+_mesa_PointParameterfv( GLenum pname, const GLfloat *params)
{
GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPointParameterfvEXT");
+
+ /* Drivers that support point sprites must also support point parameters.
+ * If point parameters aren't supported, then this function shouldn't even
+ * exist.
+ */
+ assert(!(ctx->Extensions.ARB_point_sprite
+ || ctx->Extensions.NV_point_sprite)
+ || ctx->Extensions.EXT_point_parameters);
+
+ if (!ctx->Extensions.EXT_point_parameters) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "unsupported function called (unsupported extension)");
+ return;
+ }
switch (pname) {
case GL_DISTANCE_ATTENUATION_EXT:
- {
- const 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);
-
- if (tmp != ctx->Point.Attenuated) {
- ctx->Enabled ^= ENABLE_POINT_ATTEN;
- ctx->TriangleCaps ^= DD_POINT_ATTEN;
- }
- }
+ if (TEST_EQ_3V(ctx->Point.Params, params))
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ COPY_3V(ctx->Point.Params, params);
+ ctx->Point._Attenuated = (ctx->Point.Params[0] != 1.0F ||
+ ctx->Point.Params[1] != 0.0F ||
+ ctx->Point.Params[2] != 0.0F);
break;
case GL_POINT_SIZE_MIN_EXT:
- if (*params < 0.0F) {
- gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
return;
}
- ctx->Point.MinSize = *params;
+ if (ctx->Point.MinSize == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.MinSize = params[0];
break;
case GL_POINT_SIZE_MAX_EXT:
- if (*params < 0.0F) {
- gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
return;
}
- ctx->Point.MaxSize = *params;
+ if (ctx->Point.MaxSize == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.MaxSize = params[0];
break;
case GL_POINT_FADE_THRESHOLD_SIZE_EXT:
- if (*params < 0.0F) {
- gl_error( ctx, GL_INVALID_VALUE, "glPointParameterfvEXT" );
+ if (params[0] < 0.0F) {
+ _mesa_error( ctx, GL_INVALID_VALUE,
+ "glPointParameterf[v]{EXT,ARB}(param)" );
return;
}
- ctx->Point.Threshold = *params;
+ if (ctx->Point.Threshold == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.Threshold = params[0];
break;
- default:
- gl_error( ctx, GL_INVALID_ENUM, "glPointParameterfvEXT" );
- return;
- }
-
- ctx->NewState |= _NEW_POINT;
-}
-
-
-/**********************************************************************/
-/***** 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)
- *
- * 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.
- */
-
-
-
-
-
-/*
- * CI points with size == 1.0
- */
-static void
-size1_ci_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLfloat *win, *fog;
- GLint *pbx = PB->x, *pby = PB->y;
- GLdepth *pbz = PB->z;
- GLfixed *pbfog = PB->fog;
- GLuint *pbi = PB->index;
- GLuint pbcount = PB->count;
- GLuint i;
-
- win = &VB->Win.data[first][0];
- fog = &VB->FogCoordPtr->data[first];
-
- 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);
- pbfog[pbcount] = FloatToFixed(fog[i]);
- pbi[pbcount] = VB->IndexPtr->data[i];
- pbcount++;
- }
- win += 3;
- }
- PB->count = pbcount;
- PB_CHECK_FLUSH(ctx, PB);
-}
-
-
-
-/*
- * RGBA points with size == 1.0
- */
-static void
-size1_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 fog;
- 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);
-
- fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- 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, fog, red, green, blue, alpha );
- }
- }
- PB_CHECK_FLUSH(ctx, PB);
-}
-
-
-
-/*
- * General CI points.
- */
-static void
-general_ci_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- const GLint isize = (GLint) (ctx->Point.Size + 0.5F);
- GLint radius = isize >> 1;
- GLuint i;
-
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- GLint x0, x1, y0, y1;
- GLint ix, iy;
-
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
+ 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 (_mesa_is_desktop_gl(ctx) && 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;
- }
-
- PB_SET_INDEX( PB, VB->IndexPtr->data[i] );
-
- for (iy = y0; iy <= y1; iy++) {
- for (ix = x0; ix <= x1; ix++) {
- PB_WRITE_PIXEL( PB, ix, iy, z, fog );
- }
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ 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;
- GLint isize = (GLint) (ctx->Point.Size + 0.5F);
- GLint radius = isize >> 1;
- GLuint i;
-
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- GLint x0, x1, y0, y1;
- GLint ix, iy;
-
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- if (isize & 1) {
- /* odd size */
- x0 = x - radius;
- x1 = x + radius;
- y0 = y - radius;
- y1 = y + radius;
+ break;
+ case GL_POINT_SPRITE_COORD_ORIGIN:
+ /* GL_POINT_SPRITE_COORD_ORIGIN was added to point sprites when the
+ * extension was merged into OpenGL 2.0.
+ */
+ if ((ctx->API == API_OPENGL_COMPAT && ctx->Version >= 20)
+ || ctx->API == API_OPENGL_CORE) {
+ 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;
}
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,
- 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, fog );
- }
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
}
- PB_CHECK_FLUSH(ctx,PB);
- }
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)" );
+ return;
}
-}
-
-
-
-
-/*
- * 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 x0, x1, y0, y1;
- GLint ix, iy, radius;
- GLint red, green, blue, alpha;
- GLfloat s, t, u;
-
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- GLint isize = (GLint) (ctx->Point.Size + 0.5F);
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- 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];
- 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;
- default:
- /* should never get here */
- s = t = u = 0.0;
- gl_problem(ctx, "unexpected texcoord size in textured_rgba_points()");
- }
- 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);
- }
- }
+ if (ctx->Driver.PointParameterfv)
+ ctx->Driver.PointParameterfv(ctx, pname, params);
}
-/*
- * 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) {
- const GLint red = VB->ColorPtr->data[i][0];
- const GLint green = VB->ColorPtr->data[i][1];
- const GLint blue = VB->ColorPtr->data[i][2];
- const GLint alpha = VB->ColorPtr->data[i][3];
- const GLint sRed = VB->SecondaryColorPtr->data ? VB->SecondaryColorPtr->data[i][0] : 0;
- const GLint sGreen = VB->SecondaryColorPtr->data ? VB->SecondaryColorPtr->data[i][1] : 0;
- const GLint sBlue = VB->SecondaryColorPtr->data ? VB->SecondaryColorPtr->data[i][2] : 0;
- const GLint x = (GLint) VB->Win.data[i][0];
- const GLint y = (GLint) VB->Win.data[i][1];
- const GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- 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( VB->FogCoordPtr->data[i] );
-
- 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) {
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2] /
- VB->TexCoordPtr[u]->data[i][3];
- break;
- case 3:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2];
- break;
- case 2:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = 0.0;
- break;
- case 1:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = 0.0;
- texcoord[u][2] = 0.0;
- break;
- default:
- /* should never get here */
- gl_problem(ctx, "unexpected texcoord size");
- }
- }
- }
-
- 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);
- }
- }
-}
-
-
-/*
- * NOTES on aa point rasterization:
+/**
+ * Initialize the context point state.
*
- * 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)
- */
-
-
-/*
- * 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;
- 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);
- GLuint i;
-
- if (ctx->Texture.ReallyEnabled) {
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- GLint x, y;
- GLfloat vx = VB->Win.data[i][0];
- GLfloat vy = VB->Win.data[i][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) (VB->Win.data[i][2] + ctx->PointZoffset);
- const GLint red = VB->ColorPtr->data[i][0];
- const GLint green = VB->ColorPtr->data[i][1];
- const GLint blue = VB->ColorPtr->data[i][2];
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLint u, alpha;
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2] /
- VB->TexCoordPtr[u]->data[i][3];
- break;
- case 3:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2];
- break;
- case 2:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = 0.0;
- break;
- case 1:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = 0.0;
- texcoord[u][2] = 0.0;
- break;
- default:
- /* should never get here */
- gl_problem(ctx, "unexpected texcoord size in antialiased_rgba_points()");
- }
- }
- }
-
- /* 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 = 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.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 */
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- const GLint xmin = (GLint) (VB->Win.data[i][0] - 0.0 - radius);
- const GLint xmax = (GLint) (VB->Win.data[i][0] - 0.0 + radius);
- const GLint ymin = (GLint) (VB->Win.data[i][1] - 0.0 - radius);
- const GLint ymax = (GLint) (VB->Win.data[i][1] - 0.0 + radius);
- const GLint red = VB->ColorPtr->data[i][0];
- const GLint green = VB->ColorPtr->data[i][1];
- const GLint blue = VB->ColorPtr->data[i][2];
- const GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- GLint x, y;
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- /*
- printf("point %g, %g\n", VB->Win.data[i][0], VB->Win.data[i][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 - VB->Win.data[i][0];
- const GLfloat dy = y + 0.5F - VB->Win.data[i][1];
- const GLfloat dist2 = dx*dx + dy*dy;
- if (dist2 < rmax2) {
- GLint 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, fog,
- 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;
- const 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] = 1.0F / (ctx->Point.Params[0] +
- dist * (ctx->Point.Params[1] +
- dist * ctx->Point.Params[2]));
- }
-}
-
-
-static void
-dist2(GLfloat *out, GLuint first, GLuint last,
- const GLcontext *ctx, const GLvector4f *v)
-{
- GLuint stride = v->stride;
- const 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] = 1.0F / (ctx->Point.Params[0] +
- dist * (ctx->Point.Params[1] +
- dist * ctx->Point.Params[2]));
- }
-}
-
-
-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
-};
-
-
-
-/*
- * Distance Attenuated General CI points.
- */
-static void
-dist_atten_general_ci_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLfloat dist[VB_SIZE];
- const GLfloat psize = ctx->Point.Size;
- GLuint i;
-
- ASSERT(ctx->NeedEyeCoords);
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
-
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- GLfloat dsize = psize * dist[i];
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[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( PB, VB->IndexPtr->data[i] );
-
- 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);
- }
- }
-}
-
-/*
- * 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;
- GLfloat dist[VB_SIZE];
- const GLfloat psize = ctx->Point.Size;
- GLuint i;
-
- ASSERT (ctx->NeedEyeCoords);
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- GLint x0, x1, y0, y1;
- GLint ix, iy;
- GLint isize, radius;
- GLint x = (GLint) VB->Win.data[i][0];
- GLint y = (GLint) VB->Win.data[i][1];
- GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- GLfloat dsize=psize*dist[i];
- GLchan alpha;
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[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( 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, fog );
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
-}
-
-/*
- * 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;
- GLfloat dist[VB_SIZE];
- const GLfloat psize = ctx->Point.Size;
- GLuint i;
-
- ASSERT(ctx->NeedEyeCoords);
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
-
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- const GLint x = (GLint) VB->Win.data[i][0];
- const GLint y = (GLint) VB->Win.data[i][1];
- const GLint z = (GLint) (VB->Win.data[i][2] + ctx->PointZoffset);
- const GLint red = VB->ColorPtr->data[i][0];
- const GLint green = VB->ColorPtr->data[i][1];
- const GLint blue = VB->ColorPtr->data[i][2];
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLint x0, x1, y0, y1;
- GLint ix, iy, alpha, u;
- GLint isize, radius;
- GLfloat dsize = psize*dist[i];
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- /* compute point size and alpha */
- 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;
- }
-
- /* get texture coordinates */
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2] /
- VB->TexCoordPtr[u]->data[i][3];
- break;
- case 3:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2];
- break;
- case 2:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = 0.0;
- break;
- case 1:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = 0.0;
- texcoord[u][2] = 0.0;
- break;
- default:
- /* should never get here */
- gl_problem(ctx, "unexpected texcoord size");
- }
- }
- }
-
- 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);
- }
- }
-}
-
-/*
- * Distance Attenuated Antialiased points with or without texture mapping.
+ * \param ctx GL context.
+ *
+ * Initializes __struct gl_contextRec::Point and point related constants in
+ * __struct gl_contextRec::Const.
*/
-static void
-dist_atten_antialiased_rgba_points( GLcontext *ctx, GLuint first, GLuint last )
-{
- struct vertex_buffer *VB = ctx->VB;
- struct pixel_buffer *PB = ctx->PB;
- GLfloat dist[VB_SIZE];
- const GLfloat psize = ctx->Point.Size;
- GLuint i;
-
- ASSERT(ctx->NeedEyeCoords);
- (eye_dist_tab[VB->EyePtr->size])( dist, first, last, ctx, VB->EyePtr );
-
- if (ctx->Texture.ReallyEnabled) {
- for (i=first;i<=last;i++) {
- if (VB->ClipMask[i]==0) {
- 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[i];
- GLint u;
-
- GLfixed fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- 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) (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];
-
- /* get texture coordinates */
- for (u = 0; u < ctx->Const.MaxTextureUnits; u++) {
- if (ctx->Texture.Unit[u].ReallyEnabled) {
- switch (VB->TexCoordPtr[0]->size) {
- case 4:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1] /
- VB->TexCoordPtr[u]->data[i][3];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2] /
- VB->TexCoordPtr[u]->data[i][3];
- break;
- case 3:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = VB->TexCoordPtr[u]->data[i][2];
- break;
- case 2:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = VB->TexCoordPtr[u]->data[i][1];
- texcoord[u][2] = 0.0;
- break;
- case 1:
- texcoord[u][0] = VB->TexCoordPtr[u]->data[i][0];
- texcoord[u][1] = 0.0;
- texcoord[u][2] = 0.0;
- break;
- default:
- /* should never get here */
- gl_problem(ctx, "unexpected texcoord size");
- }
- }
- }
-
- for (y = ymin; y <= ymax; y++) {
- for (x = xmin; x <= xmax; x++) {
- const GLfloat dx = x + 0.5F - VB->Win.data[i][0];
- const GLfloat dy = y + 0.5F - VB->Win.data[i][1];
- const 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.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 */
- for (i = first; i <= last; i++) {
- if (VB->ClipMask[i] == 0) {
- 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[i];
-
- 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) (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);
-
- fog = FloatToFixed( VB->FogCoordPtr->data[i] );
-
- 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++) {
- const GLfloat dx = x + 0.5F - VB->Win.data[i][0];
- const GLfloat dy = y + 0.5F - VB->Win.data[i][1];
- const 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, fog,
- red, green, blue, alpha);
- }
- }
- }
- PB_CHECK_FLUSH(ctx,PB);
- }
- }
- }
-}
-
-
-#ifdef DEBUG
void
-_mesa_print_points_function(GLcontext *ctx)
-{
- printf("Point Func == ");
- if (ctx->Driver.PointsFunc == size1_ci_points)
- printf("size1_ci_points\n");
- else if (ctx->Driver.PointsFunc == size1_rgba_points)
- printf("size1_rgba_points\n");
- else if (ctx->Driver.PointsFunc == general_ci_points)
- printf("general_ci_points\n");
- else if (ctx->Driver.PointsFunc == general_rgba_points)
- printf("general_rgba_points\n");
- else if (ctx->Driver.PointsFunc == textured_rgba_points)
- printf("textured_rgba_points\n");
- else if (ctx->Driver.PointsFunc == multitextured_rgba_points)
- printf("multitextured_rgba_points\n");
- else if (ctx->Driver.PointsFunc == antialiased_rgba_points)
- printf("antialiased_rgba_points\n");
- else if (ctx->Driver.PointsFunc == null_points)
- printf("null_points\n");
- else if (ctx->Driver.PointsFunc == dist_atten_general_ci_points)
- printf("dist_atten_general_ci_points\n");
- else if (ctx->Driver.PointsFunc == dist_atten_general_rgba_points)
- printf("dist_atten_general_rgba_points\n");
- else if (ctx->Driver.PointsFunc == dist_atten_textured_rgba_points)
- printf("dist_atten_textured_rgba_points\n");
- else if (ctx->Driver.PointsFunc == dist_atten_antialiased_rgba_points)
- printf("dist_atten_antialiased_rgba_points\n");
- else if (!ctx->Driver.PointsFunc)
- printf("NULL\n");
- else
- printf("Driver func %p\n", ctx->Driver.PointsFunc);
+_mesa_init_point(struct gl_context *ctx)
+{
+ ctx->Point.SmoothFlag = GL_FALSE;
+ 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;
+
+ /* Page 403 (page 423 of the PDF) of the OpenGL 3.0 spec says:
+ *
+ * "Non-sprite points (section 3.4) - Enable/Disable targets
+ * POINT_SMOOTH and POINT_SPRITE, and all associated state. Point
+ * rasterization is always performed as though POINT_SPRITE were
+ * enabled."
+ *
+ * In a core context, the state will default to true, and the setters and
+ * getters are disabled.
+ */
+ ctx->Point.PointSprite = (ctx->API == API_OPENGL_CORE ||
+ ctx->API == API_OPENGLES2);
+
+ ctx->Point.SpriteRMode = GL_ZERO; /* GL_NV_point_sprite (only!) */
+ ctx->Point.SpriteOrigin = GL_UPPER_LEFT; /* GL_ARB_point_sprite */
+ ctx->Point.CoordReplace = 0; /* GL_ARB/NV_point_sprite */
}
-#endif
-
-
-/*
- * 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.MultiTextureEnabled ||
- ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR ||
- ctx->Fog.ColorSumEnabled) {
- 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;
- }
- }
- else if (ctx->RenderMode==GL_FEEDBACK) {
- ctx->Driver.PointsFunc = gl_feedback_points;
- }
- else {
- /* GL_SELECT mode */
- ctx->Driver.PointsFunc = gl_select_points;
- }
-
- /*_mesa_print_points_function(ctx);*/
-}
-
projects / mesa.git / blobdiff