X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Ffeedback.c;h=48c2ccbff30c1965dcbad186d21fe8afe965e951;hb=d960a0621d65ae9977efe9bbb51dce9e1571b114;hp=4a1ebe0b97e0c609f81382d46c1cebcbd38a628b;hpb=cab974cf6c2dbfbf5dd5d291e1aae0f8eeb34290;p=mesa.git diff --git a/src/mesa/main/feedback.c b/src/mesa/main/feedback.c index 4a1ebe0b97e..48c2ccbff30 100644 --- a/src/mesa/main/feedback.c +++ b/src/mesa/main/feedback.c @@ -1,10 +1,13 @@ -/* $Id: feedback.c,v 1.18 2000/12/26 05:09:28 keithw Exp $ */ +/** + * \file feedback.c + * Selection and feedback modes functions. + */ /* * Mesa 3-D graphics library - * Version: 3.3 + * Version: 5.1 * - * Copyright (C) 1999-2000 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2003 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"), @@ -25,20 +28,17 @@ */ -#ifdef PC_HEADER -#include "all.h" -#else #include "glheader.h" #include "colormac.h" #include "context.h" #include "enums.h" #include "feedback.h" #include "macros.h" -#include "mmath.h" #include "mtypes.h" -#endif +#if _HAVE_FULL_GL + #define FB_3D 0x01 #define FB_4D 0x02 @@ -48,24 +48,23 @@ -void +void GLAPIENTRY _mesa_FeedbackBuffer( GLsizei size, GLenum type, GLfloat *buffer ) { GET_CURRENT_CONTEXT(ctx); - ASSERT_OUTSIDE_BEGIN_END(ctx); + ASSERT_OUTSIDE_BEGIN_END(ctx); if (ctx->RenderMode==GL_FEEDBACK) { - gl_error( ctx, GL_INVALID_OPERATION, "glFeedbackBuffer" ); + _mesa_error( ctx, GL_INVALID_OPERATION, "glFeedbackBuffer" ); return; } - if (size<0) { - gl_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(size<0)" ); + _mesa_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(size<0)" ); return; } if (!buffer) { - gl_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(buffer==NULL)" ); - ctx->Feedback.BufferSize = 0; /* XXX -- Sould this be here??? */ + _mesa_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(buffer==NULL)" ); + ctx->Feedback.BufferSize = 0; return; } @@ -77,21 +76,21 @@ _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.RGBAflag ? FB_COLOR : FB_INDEX)); + ctx->Feedback._Mask = (FB_3D | + (ctx->Visual.rgbMode ? FB_COLOR : FB_INDEX)); break; case GL_3D_COLOR_TEXTURE: - ctx->Feedback._Mask = (FB_3D | - (ctx->Visual.RGBAflag ? FB_COLOR : FB_INDEX) | + ctx->Feedback._Mask = (FB_3D | + (ctx->Visual.rgbMode ? FB_COLOR : FB_INDEX) | FB_TEXTURE); break; case GL_4D_COLOR_TEXTURE: - ctx->Feedback._Mask = (FB_3D | FB_4D | - (ctx->Visual.RGBAflag ? FB_COLOR : FB_INDEX) | + ctx->Feedback._Mask = (FB_3D | FB_4D | + (ctx->Visual.rgbMode ? FB_COLOR : FB_INDEX) | FB_TEXTURE); break; default: - gl_error( ctx, GL_INVALID_ENUM, "glFeedbackBuffer" ); + _mesa_error( ctx, GL_INVALID_ENUM, "glFeedbackBuffer" ); return; } @@ -103,8 +102,7 @@ _mesa_FeedbackBuffer( GLsizei size, GLenum type, GLfloat *buffer ) } - -void +void GLAPIENTRY _mesa_PassThrough( GLfloat token ) { GET_CURRENT_CONTEXT(ctx); @@ -122,14 +120,26 @@ _mesa_PassThrough( GLfloat token ) /* * Put a vertex into the feedback buffer. */ -void gl_feedback_vertex( GLcontext *ctx, - const GLfloat win[4], - const GLfloat color[4], - GLuint index, - const GLfloat texcoord[4] ) +void _mesa_feedback_vertex( GLcontext *ctx, + const GLfloat win[4], + const GLfloat color[4], + GLfloat index, + const GLfloat texcoord[4] ) { +#if 0 + { + /* snap window x, y to fractional pixel position */ + const GLint snapMask = ~((FIXED_ONE / (1 << SUB_PIXEL_BITS)) - 1); + GLfixed x, y; + x = FloatToFixed(win[0]) & snapMask; + y = FloatToFixed(win[1]) & snapMask; + FEEDBACK_TOKEN(ctx, FixedToFloat(x)); + FEEDBACK_TOKEN(ctx, FixedToFloat(y) ); + } +#else FEEDBACK_TOKEN( ctx, win[0] ); FEEDBACK_TOKEN( ctx, win[1] ); +#endif if (ctx->Feedback._Mask & FB_3D) { FEEDBACK_TOKEN( ctx, win[2] ); } @@ -153,26 +163,38 @@ void gl_feedback_vertex( GLcontext *ctx, } } -/**********************************************************************/ -/* Selection */ -/**********************************************************************/ +#endif -/* - * 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 __GLcontextRec::Select with the given buffer. */ -void +void GLAPIENTRY _mesa_SelectBuffer( GLsizei size, GLuint *buffer ) { GET_CURRENT_CONTEXT(ctx); ASSERT_OUTSIDE_BEGIN_END(ctx); if (ctx->RenderMode==GL_SELECT) { - gl_error( ctx, GL_INVALID_OPERATION, "glSelectBuffer" ); + _mesa_error( ctx, GL_INVALID_OPERATION, "glSelectBuffer" ); 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; @@ -182,6 +204,15 @@ _mesa_SelectBuffer( GLsizei size, GLuint *buffer ) } +/** + * Write a value of a record into the selection buffer. + * + * \param CTX GL context. + * \param V value. + * + * Verifies there is free space in the buffer to write the value and + * increments the pointer. + */ #define WRITE_RECORD( CTX, V ) \ if (CTX->Select.BufferCount < CTX->Select.BufferSize) { \ CTX->Select.Buffer[CTX->Select.BufferCount] = (V); \ @@ -189,8 +220,16 @@ _mesa_SelectBuffer( GLsizei size, GLuint *buffer ) CTX->Select.BufferCount++; - -void gl_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( GLcontext *ctx, GLfloat z ) { ctx->Select.HitFlag = GL_TRUE; if (z < ctx->Select.HitMinZ) { @@ -202,6 +241,17 @@ void gl_update_hitflag( GLcontext *ctx, GLfloat z ) } +/** + * 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( GLcontext *ctx ) { GLuint i; @@ -228,8 +278,14 @@ 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 + * __GLcontextRec::NewState. + */ +void GLAPIENTRY _mesa_InitNames( void ) { GET_CURRENT_CONTEXT(ctx); @@ -249,8 +305,18 @@ _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 __GLcontextRec::Select. + */ +void GLAPIENTRY _mesa_LoadName( GLuint name ) { GET_CURRENT_CONTEXT(ctx); @@ -260,7 +326,7 @@ _mesa_LoadName( GLuint name ) return; } if (ctx->Select.NameStackDepth == 0) { - gl_error( ctx, GL_INVALID_OPERATION, "glLoadName" ); + _mesa_error( ctx, GL_INVALID_OPERATION, "glLoadName" ); return; } @@ -278,7 +344,18 @@ _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 __GLcontextRec::Select. + */ +void GLAPIENTRY _mesa_PushName( GLuint name ) { GET_CURRENT_CONTEXT(ctx); @@ -293,15 +370,23 @@ _mesa_PushName( GLuint name ) write_hit_record( ctx ); } if (ctx->Select.NameStackDepth >= MAX_NAME_STACK_DEPTH) { - gl_error( ctx, GL_STACK_OVERFLOW, "glPushName" ); + _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushName" ); } else ctx->Select.NameStack[ctx->Select.NameStackDepth++] = 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 __GLcontextRec::Select. + */ +void GLAPIENTRY _mesa_PopName( void ) { GET_CURRENT_CONTEXT(ctx); @@ -316,24 +401,35 @@ _mesa_PopName( void ) write_hit_record( ctx ); } if (ctx->Select.NameStackDepth == 0) { - gl_error( ctx, GL_STACK_UNDERFLOW, "glPopName" ); + _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopName" ); } else 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 + * __GLcontextRec::RenderMode and notifies the driver via the + * dd_function_table::RenderMode callback. */ -GLint +GLint GLAPIENTRY _mesa_RenderMode( GLenum mode ) { GET_CURRENT_CONTEXT(ctx); @@ -341,10 +437,9 @@ _mesa_RenderMode( GLenum mode ) ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0); if (MESA_VERBOSE & VERBOSE_API) - fprintf(stderr, "glRenderMode %s\n", gl_lookup_enum_by_nr(mode)); + _mesa_debug(ctx, "glRenderMode %s\n", _mesa_lookup_enum_by_nr(mode)); FLUSH_VERTICES(ctx, _NEW_RENDERMODE); - ctx->_TriangleCaps &= ~(DD_FEEDBACK|DD_SELECT); switch (ctx->RenderMode) { case GL_RENDER: @@ -368,6 +463,7 @@ _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 */ @@ -378,8 +474,9 @@ _mesa_RenderMode( GLenum mode ) } ctx->Feedback.Count = 0; break; +#endif default: - gl_error( ctx, GL_INVALID_ENUM, "glRenderMode" ); + _mesa_error( ctx, GL_INVALID_ENUM, "glRenderMode" ); return 0; } @@ -387,25 +484,58 @@ _mesa_RenderMode( GLenum mode ) case GL_RENDER: break; case GL_SELECT: - ctx->_TriangleCaps |= DD_SELECT; if (ctx->Select.BufferSize==0) { /* haven't called glSelectBuffer yet */ - gl_error( ctx, GL_INVALID_OPERATION, "glRenderMode" ); + _mesa_error( ctx, GL_INVALID_OPERATION, "glRenderMode" ); } break; +#if _HAVE_FULL_GL case GL_FEEDBACK: - ctx->_TriangleCaps |= DD_FEEDBACK; if (ctx->Feedback.BufferSize==0) { /* haven't called glFeedbackBuffer yet */ - gl_error( ctx, GL_INVALID_OPERATION, "glRenderMode" ); + _mesa_error( ctx, GL_INVALID_OPERATION, "glRenderMode" ); } break; +#endif default: - gl_error( ctx, GL_INVALID_ENUM, "glRenderMode" ); + _mesa_error( ctx, GL_INVALID_ENUM, "glRenderMode" ); return 0; } ctx->RenderMode = mode; + if (ctx->Driver.RenderMode) + ctx->Driver.RenderMode( ctx, mode ); + return result; } +/*@}*/ + + +/**********************************************************************/ +/** \name Initialization */ +/*@{*/ + +/** + * Initialize context feedback data. + */ +void _mesa_init_feedback( GLcontext * 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; +} + +/*@}*/