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-rw-r--r--src/mesa/main/points.c294
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diff --git a/src/mesa/main/points.c b/src/mesa/main/points.c
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+/**
+ * \file points.c
+ * Point operations.
+ */
+
+/*
+ * Mesa 3-D graphics library
+ * 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
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "macros.h"
+#include "points.h"
+#include "texstate.h"
+#include "mtypes.h"
+
+
+/**
+ * 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(ctx);
+
+ if (size <= 0.0) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glPointSize" );
+ return;
+ }
+
+ if (ctx->Point.Size == size)
+ return;
+
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.Size = size;
+
+ if (ctx->Driver.PointSize)
+ ctx->Driver.PointSize(ctx, size);
+}
+
+
+#if _HAVE_FULL_GL
+
+/*
+ * Added by GL_NV_point_sprite
+ */
+void GLAPIENTRY
+_mesa_PointParameteriNV( GLenum pname, GLint param )
+{
+ const GLfloat value = (GLfloat) param;
+ _mesa_PointParameterfvEXT(pname, &value);
+}
+
+
+/*
+ * Added by GL_NV_point_sprite
+ */
+void GLAPIENTRY
+_mesa_PointParameterivNV( GLenum pname, const GLint *params )
+{
+ const GLfloat value = (GLfloat) params[0];
+ _mesa_PointParameterfvEXT(pname, &value);
+}
+
+
+
+/*
+ * Same for both GL_EXT_point_parameters and GL_ARB_point_parameters.
+ */
+void GLAPIENTRY
+_mesa_PointParameterfEXT( GLenum pname, GLfloat param)
+{
+ _mesa_PointParameterfvEXT(pname, &param);
+}
+
+
+
+/*
+ * Same for both GL_EXT_point_parameters and GL_ARB_point_parameters.
+ */
+void GLAPIENTRY
+_mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ 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 {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ 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;
+ }
+ if (ctx->Point.MinSize == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.MinSize = params[0];
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ 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;
+ }
+ if (ctx->Point.MaxSize == params[0])
+ return;
+ FLUSH_VERTICES(ctx, _NEW_POINT);
+ ctx->Point.MaxSize = params[0];
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ 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];
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ 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 {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ 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;
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)");
+ return;
+ }
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM,
+ "glPointParameterf[v]{EXT,ARB}(pname)" );
+ return;
+ }
+
+ if (ctx->Driver.PointParameterfv)
+ (*ctx->Driver.PointParameterfv)(ctx, pname, params);
+}
+#endif
+
+
+
+/**
+ * Update derived point-related state.
+ */
+void
+_mesa_update_point(GLcontext *ctx)
+{
+ /* 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;
+}
+
+
+
+/**
+ * Initialize the context point state.
+ *
+ * \param ctx GL context.
+ *
+ * Initializes __GLcontextRec::Point and point related constants in
+ * __GLcontextRec::Const.
+ */
+void
+_mesa_init_point(GLcontext *ctx)
+{
+ GLuint i;
+
+ 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 */
+ }
+}