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Diffstat (limited to 'mesalib/src/mesa/main/points.c')
| -rw-r--r-- | mesalib/src/mesa/main/points.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/mesalib/src/mesa/main/points.c b/mesalib/src/mesa/main/points.c new file mode 100644 index 000000000..4c8fc1f72 --- /dev/null +++ b/mesalib/src/mesa/main/points.c @@ -0,0 +1,263 @@ +/** + * \file points.c + * Point operations. + */ + +/* + * Mesa 3-D graphics library + * Version: 7.1 + * + * 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. + */ + + +#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 + + +void GLAPIENTRY +_mesa_PointParameteri( GLenum pname, GLint param ) +{ + const GLfloat value = (GLfloat) param; + _mesa_PointParameterfv(pname, &value); +} + + +void GLAPIENTRY +_mesa_PointParameteriv( GLenum pname, const GLint *params ) +{ + 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 GLAPIENTRY +_mesa_PointParameterf( GLenum pname, GLfloat param) +{ + _mesa_PointParameterfv(pname, ¶m); +} + + +void GLAPIENTRY +_mesa_PointParameterfv( 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); + 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; + } + 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 || ctx->Extensions.NV_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 + + + +/** + * 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.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_COORD_UNITS; i++) { + ctx->Point.CoordReplace[i] = GL_FALSE; /* GL_ARB/NV_point_sprite */ + } +} |