X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Ffeedback.c;h=ffdecaecc29e0a92640980b49b61c2c0a6847cf5;hb=cd6a31cd4a9ea6deef4778c2eaef2d47240c3a6e;hp=330fd7d2be2742cd325d0036c01d0edbffeb4b38;hpb=3c63452e64df7e10aa073c6c3b9492b1d7dabbb8;p=mesa.git diff --git a/src/mesa/main/feedback.c b/src/mesa/main/feedback.c index 330fd7d2be2..ffdecaecc29 100644 --- a/src/mesa/main/feedback.c +++ b/src/mesa/main/feedback.c @@ -1,10 +1,9 @@ -/* $Id: feedback.c,v 1.27 2002/10/24 23:57:20 brianp Exp $ */ - /* * Mesa 3-D graphics library - * Version: 4.1 + * Version: 7.5 * - * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. + * Copyright (C) 2009 VMware, Inc. 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"), @@ -24,6 +23,11 @@ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/** + * \file feedback.c + * Selection and feedback modes functions. + */ + #include "glheader.h" #include "colormac.h" @@ -31,20 +35,21 @@ #include "enums.h" #include "feedback.h" #include "macros.h" -#include "mmath.h" #include "mtypes.h" +#include "main/dispatch.h" +#if FEATURE_feedback + #define FB_3D 0x01 #define FB_4D 0x02 -#define FB_INDEX 0x04 -#define FB_COLOR 0x08 -#define FB_TEXTURE 0X10 +#define FB_COLOR 0x04 +#define FB_TEXTURE 0X08 -void +static void GLAPIENTRY _mesa_FeedbackBuffer( GLsizei size, GLenum type, GLfloat *buffer ) { GET_CURRENT_CONTEXT(ctx); @@ -72,18 +77,13 @@ _mesa_FeedbackBuffer( GLsizei size, GLenum type, GLfloat *buffer ) ctx->Feedback._Mask = FB_3D; break; case GL_3D_COLOR: - ctx->Feedback._Mask = (FB_3D | - (ctx->Visual.rgbMode ? FB_COLOR : FB_INDEX)); + ctx->Feedback._Mask = (FB_3D | FB_COLOR); break; case GL_3D_COLOR_TEXTURE: - ctx->Feedback._Mask = (FB_3D | - (ctx->Visual.rgbMode ? FB_COLOR : FB_INDEX) | - FB_TEXTURE); + ctx->Feedback._Mask = (FB_3D | FB_COLOR | FB_TEXTURE); break; case GL_4D_COLOR_TEXTURE: - ctx->Feedback._Mask = (FB_3D | FB_4D | - (ctx->Visual.rgbMode ? FB_COLOR : FB_INDEX) | - FB_TEXTURE); + ctx->Feedback._Mask = (FB_3D | FB_4D | FB_COLOR | FB_TEXTURE); break; default: _mesa_error( ctx, GL_INVALID_ENUM, "glFeedbackBuffer" ); @@ -98,7 +98,7 @@ _mesa_FeedbackBuffer( GLsizei size, GLenum type, GLfloat *buffer ) } -void +static void GLAPIENTRY _mesa_PassThrough( GLfloat token ) { GET_CURRENT_CONTEXT(ctx); @@ -106,57 +106,62 @@ _mesa_PassThrough( GLfloat token ) if (ctx->RenderMode==GL_FEEDBACK) { FLUSH_VERTICES(ctx, 0); - FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_PASS_THROUGH_TOKEN ); - FEEDBACK_TOKEN( ctx, token ); + _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_PASS_THROUGH_TOKEN ); + _mesa_feedback_token( ctx, token ); } } - -/* +/** * Put a vertex into the feedback buffer. */ -void _mesa_feedback_vertex( GLcontext *ctx, - const GLfloat win[4], - const GLfloat color[4], - GLuint index, - const GLfloat texcoord[4] ) +void +_mesa_feedback_vertex(struct gl_context *ctx, + const GLfloat win[4], + const GLfloat color[4], + const GLfloat texcoord[4]) { - FEEDBACK_TOKEN( ctx, win[0] ); - FEEDBACK_TOKEN( ctx, win[1] ); + _mesa_feedback_token( ctx, win[0] ); + _mesa_feedback_token( ctx, win[1] ); if (ctx->Feedback._Mask & FB_3D) { - FEEDBACK_TOKEN( ctx, win[2] ); + _mesa_feedback_token( ctx, win[2] ); } if (ctx->Feedback._Mask & FB_4D) { - FEEDBACK_TOKEN( ctx, win[3] ); - } - if (ctx->Feedback._Mask & FB_INDEX) { - FEEDBACK_TOKEN( ctx, (GLfloat) index ); + _mesa_feedback_token( ctx, win[3] ); } if (ctx->Feedback._Mask & FB_COLOR) { - FEEDBACK_TOKEN( ctx, color[0] ); - FEEDBACK_TOKEN( ctx, color[1] ); - FEEDBACK_TOKEN( ctx, color[2] ); - FEEDBACK_TOKEN( ctx, color[3] ); + _mesa_feedback_token( ctx, color[0] ); + _mesa_feedback_token( ctx, color[1] ); + _mesa_feedback_token( ctx, color[2] ); + _mesa_feedback_token( ctx, color[3] ); } if (ctx->Feedback._Mask & FB_TEXTURE) { - FEEDBACK_TOKEN( ctx, texcoord[0] ); - FEEDBACK_TOKEN( ctx, texcoord[1] ); - FEEDBACK_TOKEN( ctx, texcoord[2] ); - FEEDBACK_TOKEN( ctx, texcoord[3] ); + _mesa_feedback_token( ctx, texcoord[0] ); + _mesa_feedback_token( ctx, texcoord[1] ); + _mesa_feedback_token( ctx, texcoord[2] ); + _mesa_feedback_token( ctx, texcoord[3] ); } } /**********************************************************************/ -/* Selection */ -/**********************************************************************/ - - -/* - * NOTE: this function can't be put in a display list. +/** \name Selection */ +/*@{*/ + +/** + * Establish a buffer for selection mode values. + * + * \param size buffer size. + * \param buffer buffer. + * + * \sa glSelectBuffer(). + * + * \note this function can't be put in a display list. + * + * Verifies we're not in selection mode, flushes the vertices and initialize + * the fields in __struct gl_contextRec::Select with the given buffer. */ -void +static void GLAPIENTRY _mesa_SelectBuffer( GLsizei size, GLuint *buffer ) { GET_CURRENT_CONTEXT(ctx); @@ -167,7 +172,7 @@ _mesa_SelectBuffer( GLsizei size, GLuint *buffer ) return; /* KW: added return */ } - FLUSH_VERTICES(ctx, _NEW_RENDERMODE); /* why bother? */ + FLUSH_VERTICES(ctx, _NEW_RENDERMODE); ctx->Select.Buffer = buffer; ctx->Select.BufferSize = size; ctx->Select.BufferCount = 0; @@ -177,15 +182,36 @@ _mesa_SelectBuffer( GLsizei size, GLuint *buffer ) } -#define WRITE_RECORD( CTX, V ) \ - if (CTX->Select.BufferCount < CTX->Select.BufferSize) { \ - CTX->Select.Buffer[CTX->Select.BufferCount] = (V); \ - } \ - CTX->Select.BufferCount++; - +/** + * Write a value of a record into the selection buffer. + * + * \param ctx GL context. + * \param value value. + * + * Verifies there is free space in the buffer to write the value and + * increments the pointer. + */ +static INLINE void +write_record(struct gl_context *ctx, GLuint value) +{ + if (ctx->Select.BufferCount < ctx->Select.BufferSize) { + ctx->Select.Buffer[ctx->Select.BufferCount] = value; + } + ctx->Select.BufferCount++; +} -void _mesa_update_hitflag( GLcontext *ctx, GLfloat z ) +/** + * Update the hit flag and the maximum and minimum depth values. + * + * \param ctx GL context. + * \param z depth. + * + * Sets gl_selection::HitFlag and updates gl_selection::HitMinZ and + * gl_selection::HitMaxZ. + */ +void +_mesa_update_hitflag(struct gl_context *ctx, GLfloat z) { ctx->Select.HitFlag = GL_TRUE; if (z < ctx->Select.HitMinZ) { @@ -197,7 +223,19 @@ void _mesa_update_hitflag( GLcontext *ctx, GLfloat z ) } -static void write_hit_record( GLcontext *ctx ) +/** + * Write the hit record. + * + * \param ctx GL context. + * + * Write the hit record, i.e., the number of names in the stack, the minimum and + * maximum depth values and the number of names in the name stack at the time + * of the event. Resets the hit flag. + * + * \sa gl_selection. + */ +static void +write_hit_record(struct gl_context *ctx) { GLuint i; GLuint zmin, zmax, zscale = (~0u); @@ -209,11 +247,11 @@ static void write_hit_record( GLcontext *ctx ) zmin = (GLuint) ((GLfloat) zscale * ctx->Select.HitMinZ); zmax = (GLuint) ((GLfloat) zscale * ctx->Select.HitMaxZ); - WRITE_RECORD( ctx, ctx->Select.NameStackDepth ); - WRITE_RECORD( ctx, zmin ); - WRITE_RECORD( ctx, zmax ); + write_record( ctx, ctx->Select.NameStackDepth ); + write_record( ctx, zmin ); + write_record( ctx, zmax ); for (i = 0; i < ctx->Select.NameStackDepth; i++) { - WRITE_RECORD( ctx, ctx->Select.NameStack[i] ); + write_record( ctx, ctx->Select.NameStack[i] ); } ctx->Select.Hits++; @@ -223,8 +261,14 @@ static void write_hit_record( GLcontext *ctx ) } - -void +/** + * Initialize the name stack. + * + * Verifies we are in select mode and resets the name stack depth and resets + * the hit record data in gl_selection. Marks new render mode in + * __struct gl_contextRec::NewState. + */ +static void GLAPIENTRY _mesa_InitNames( void ) { GET_CURRENT_CONTEXT(ctx); @@ -244,8 +288,18 @@ _mesa_InitNames( void ) } - -void +/** + * Load the top-most name of the name stack. + * + * \param name name. + * + * Verifies we are in selection mode and that the name stack is not empty. + * Flushes vertices. If there is a hit flag writes it (via write_hit_record()), + * and replace the top-most name in the stack. + * + * sa __struct gl_contextRec::Select. + */ +static void GLAPIENTRY _mesa_LoadName( GLuint name ) { GET_CURRENT_CONTEXT(ctx); @@ -273,7 +327,18 @@ _mesa_LoadName( GLuint name ) } -void +/** + * Push a name into the name stack. + * + * \param name name. + * + * Verifies we are in selection mode and that the name stack is not full. + * Flushes vertices. If there is a hit flag writes it (via write_hit_record()), + * and adds the name to the top of the name stack. + * + * sa __struct gl_contextRec::Select. + */ +static void GLAPIENTRY _mesa_PushName( GLuint name ) { GET_CURRENT_CONTEXT(ctx); @@ -295,8 +360,16 @@ _mesa_PushName( GLuint name ) } - -void +/** + * Pop a name into the name stack. + * + * Verifies we are in selection mode and that the name stack is not empty. + * Flushes vertices. If there is a hit flag writes it (via write_hit_record()), + * and removes top-most name in the name stack. + * + * sa __struct gl_contextRec::Select. + */ +static void GLAPIENTRY _mesa_PopName( void ) { GET_CURRENT_CONTEXT(ctx); @@ -317,18 +390,29 @@ _mesa_PopName( void ) ctx->Select.NameStackDepth--; } +/*@}*/ /**********************************************************************/ -/* Render Mode */ -/**********************************************************************/ - +/** \name Render Mode */ +/*@{*/ - -/* - * NOTE: this function can't be put in a display list. +/** + * Set rasterization mode. + * + * \param mode rasterization mode. + * + * \note this function can't be put in a display list. + * + * \sa glRenderMode(). + * + * Flushes the vertices and do the necessary cleanup according to the previous + * rasterization mode, such as writing the hit record or resent the select + * buffer index when exiting the select mode. Updates + * __struct gl_contextRec::RenderMode and notifies the driver via the + * dd_function_table::RenderMode callback. */ -GLint +static GLint GLAPIENTRY _mesa_RenderMode( GLenum mode ) { GET_CURRENT_CONTEXT(ctx); @@ -362,6 +446,7 @@ _mesa_RenderMode( GLenum mode ) ctx->Select.Hits = 0; ctx->Select.NameStackDepth = 0; break; +#if _HAVE_FULL_GL case GL_FEEDBACK: if (ctx->Feedback.Count > ctx->Feedback.BufferSize) { /* overflow */ @@ -372,6 +457,7 @@ _mesa_RenderMode( GLenum mode ) } ctx->Feedback.Count = 0; break; +#endif default: _mesa_error( ctx, GL_INVALID_ENUM, "glRenderMode" ); return 0; @@ -386,12 +472,14 @@ _mesa_RenderMode( GLenum mode ) _mesa_error( ctx, GL_INVALID_OPERATION, "glRenderMode" ); } break; +#if _HAVE_FULL_GL case GL_FEEDBACK: if (ctx->Feedback.BufferSize==0) { /* haven't called glFeedbackBuffer yet */ _mesa_error( ctx, GL_INVALID_OPERATION, "glRenderMode" ); } break; +#endif default: _mesa_error( ctx, GL_INVALID_ENUM, "glRenderMode" ); return 0; @@ -403,3 +491,51 @@ _mesa_RenderMode( GLenum mode ) return result; } + +/*@}*/ + + +void +_mesa_init_feedback_dispatch(struct _glapi_table *disp) +{ + SET_InitNames(disp, _mesa_InitNames); + SET_FeedbackBuffer(disp, _mesa_FeedbackBuffer); + SET_LoadName(disp, _mesa_LoadName); + SET_PassThrough(disp, _mesa_PassThrough); + SET_PopName(disp, _mesa_PopName); + SET_PushName(disp, _mesa_PushName); + SET_SelectBuffer(disp, _mesa_SelectBuffer); + SET_RenderMode(disp, _mesa_RenderMode); +} + + +#endif /* FEATURE_feedback */ + + +/**********************************************************************/ +/** \name Initialization */ +/*@{*/ + +/** + * Initialize context feedback data. + */ +void _mesa_init_feedback( struct gl_context * ctx ) +{ + /* Feedback */ + ctx->Feedback.Type = GL_2D; /* TODO: verify */ + ctx->Feedback.Buffer = NULL; + ctx->Feedback.BufferSize = 0; + ctx->Feedback.Count = 0; + + /* Selection/picking */ + ctx->Select.Buffer = NULL; + ctx->Select.BufferSize = 0; + ctx->Select.BufferCount = 0; + ctx->Select.Hits = 0; + ctx->Select.NameStackDepth = 0; + + /* Miscellaneous */ + ctx->RenderMode = GL_RENDER; +} + +/*@}*/