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-rw-r--r--mesalib/src/mesa/main/feedback.c1084
1 files changed, 542 insertions, 542 deletions
diff --git a/mesalib/src/mesa/main/feedback.c b/mesalib/src/mesa/main/feedback.c
index 80565c62c..597ec1e3f 100644
--- a/mesalib/src/mesa/main/feedback.c
+++ b/mesalib/src/mesa/main/feedback.c
@@ -1,542 +1,542 @@
-/*
- * Mesa 3-D graphics library
- * Version: 7.5
- *
- * 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"),
- * 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.
- */
-
-/**
- * \file feedback.c
- * Selection and feedback modes functions.
- */
-
-
-#include "glheader.h"
-#include "colormac.h"
-#include "context.h"
-#include "enums.h"
-#include "feedback.h"
-#include "macros.h"
-#include "mfeatures.h"
-#include "mtypes.h"
-#include "main/dispatch.h"
-
-
-#if FEATURE_feedback
-
-
-#define FB_3D 0x01
-#define FB_4D 0x02
-#define FB_COLOR 0x04
-#define FB_TEXTURE 0X08
-
-
-
-static void GLAPIENTRY
-_mesa_FeedbackBuffer( GLsizei size, GLenum type, GLfloat *buffer )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (ctx->RenderMode==GL_FEEDBACK) {
- _mesa_error( ctx, GL_INVALID_OPERATION, "glFeedbackBuffer" );
- return;
- }
- if (size<0) {
- _mesa_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(size<0)" );
- return;
- }
- if (!buffer) {
- _mesa_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(buffer==NULL)" );
- ctx->Feedback.BufferSize = 0;
- return;
- }
-
- switch (type) {
- case GL_2D:
- ctx->Feedback._Mask = 0;
- break;
- case GL_3D:
- ctx->Feedback._Mask = FB_3D;
- break;
- case GL_3D_COLOR:
- ctx->Feedback._Mask = (FB_3D | FB_COLOR);
- break;
- case GL_3D_COLOR_TEXTURE:
- ctx->Feedback._Mask = (FB_3D | FB_COLOR | FB_TEXTURE);
- break;
- case GL_4D_COLOR_TEXTURE:
- ctx->Feedback._Mask = (FB_3D | FB_4D | FB_COLOR | FB_TEXTURE);
- break;
- default:
- _mesa_error( ctx, GL_INVALID_ENUM, "glFeedbackBuffer" );
- return;
- }
-
- FLUSH_VERTICES(ctx, _NEW_RENDERMODE); /* Always flush */
- ctx->Feedback.Type = type;
- ctx->Feedback.BufferSize = size;
- ctx->Feedback.Buffer = buffer;
- ctx->Feedback.Count = 0; /* Becaues of this. */
-}
-
-
-static void GLAPIENTRY
-_mesa_PassThrough( GLfloat token )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (ctx->RenderMode==GL_FEEDBACK) {
- FLUSH_VERTICES(ctx, 0);
- _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(struct gl_context *ctx,
- const GLfloat win[4],
- const GLfloat color[4],
- const GLfloat texcoord[4])
-{
- _mesa_feedback_token( ctx, win[0] );
- _mesa_feedback_token( ctx, win[1] );
- if (ctx->Feedback._Mask & FB_3D) {
- _mesa_feedback_token( ctx, win[2] );
- }
- if (ctx->Feedback._Mask & FB_4D) {
- _mesa_feedback_token( ctx, win[3] );
- }
- if (ctx->Feedback._Mask & FB_COLOR) {
- _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) {
- _mesa_feedback_token( ctx, texcoord[0] );
- _mesa_feedback_token( ctx, texcoord[1] );
- _mesa_feedback_token( ctx, texcoord[2] );
- _mesa_feedback_token( ctx, texcoord[3] );
- }
-}
-
-
-/**********************************************************************/
-/** \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.
- */
-static void GLAPIENTRY
-_mesa_SelectBuffer( GLsizei size, GLuint *buffer )
-{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (ctx->RenderMode==GL_SELECT) {
- _mesa_error( ctx, GL_INVALID_OPERATION, "glSelectBuffer" );
- return; /* KW: added return */
- }
-
- FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
- ctx->Select.Buffer = buffer;
- ctx->Select.BufferSize = size;
- ctx->Select.BufferCount = 0;
- ctx->Select.HitFlag = GL_FALSE;
- ctx->Select.HitMinZ = 1.0;
- ctx->Select.HitMaxZ = 0.0;
-}
-
-
-/**
- * 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++;
-}
-
-
-/**
- * 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) {
- ctx->Select.HitMinZ = z;
- }
- if (z > ctx->Select.HitMaxZ) {
- ctx->Select.HitMaxZ = 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(struct gl_context *ctx)
-{
- GLuint i;
- GLuint zmin, zmax, zscale = (~0u);
-
- /* HitMinZ and HitMaxZ are in [0,1]. Multiply these values by */
- /* 2^32-1 and round to nearest unsigned integer. */
-
- assert( ctx != NULL ); /* this line magically fixes a SunOS 5.x/gcc bug */
- 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 );
- for (i = 0; i < ctx->Select.NameStackDepth; i++) {
- write_record( ctx, ctx->Select.NameStack[i] );
- }
-
- ctx->Select.Hits++;
- ctx->Select.HitFlag = GL_FALSE;
- ctx->Select.HitMinZ = 1.0;
- ctx->Select.HitMaxZ = -1.0;
-}
-
-
-/**
- * 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);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
-
- /* Record the hit before the HitFlag is wiped out again. */
- if (ctx->RenderMode == GL_SELECT) {
- if (ctx->Select.HitFlag) {
- write_hit_record( ctx );
- }
- }
- ctx->Select.NameStackDepth = 0;
- ctx->Select.HitFlag = GL_FALSE;
- ctx->Select.HitMinZ = 1.0;
- ctx->Select.HitMaxZ = 0.0;
- ctx->NewState |= _NEW_RENDERMODE;
-}
-
-
-/**
- * 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);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (ctx->RenderMode != GL_SELECT) {
- return;
- }
- if (ctx->Select.NameStackDepth == 0) {
- _mesa_error( ctx, GL_INVALID_OPERATION, "glLoadName" );
- return;
- }
-
- FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
-
- if (ctx->Select.HitFlag) {
- write_hit_record( ctx );
- }
- if (ctx->Select.NameStackDepth < MAX_NAME_STACK_DEPTH) {
- ctx->Select.NameStack[ctx->Select.NameStackDepth-1] = name;
- }
- else {
- ctx->Select.NameStack[MAX_NAME_STACK_DEPTH-1] = name;
- }
-}
-
-
-/**
- * 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);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (ctx->RenderMode != GL_SELECT) {
- return;
- }
-
- FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
- if (ctx->Select.HitFlag) {
- write_hit_record( ctx );
- }
- if (ctx->Select.NameStackDepth >= MAX_NAME_STACK_DEPTH) {
- _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushName" );
- }
- else
- ctx->Select.NameStack[ctx->Select.NameStackDepth++] = name;
-}
-
-
-/**
- * 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);
- ASSERT_OUTSIDE_BEGIN_END(ctx);
-
- if (ctx->RenderMode != GL_SELECT) {
- return;
- }
-
- FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
- if (ctx->Select.HitFlag) {
- write_hit_record( ctx );
- }
- if (ctx->Select.NameStackDepth == 0) {
- _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopName" );
- }
- else
- ctx->Select.NameStackDepth--;
-}
-
-/*@}*/
-
-
-/**********************************************************************/
-/** \name Render Mode */
-/*@{*/
-
-/**
- * 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.
- */
-static GLint GLAPIENTRY
-_mesa_RenderMode( GLenum mode )
-{
- GET_CURRENT_CONTEXT(ctx);
- GLint result;
- ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
-
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glRenderMode %s\n", _mesa_lookup_enum_by_nr(mode));
-
- FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
-
- switch (ctx->RenderMode) {
- case GL_RENDER:
- result = 0;
- break;
- case GL_SELECT:
- if (ctx->Select.HitFlag) {
- write_hit_record( ctx );
- }
- if (ctx->Select.BufferCount > ctx->Select.BufferSize) {
- /* overflow */
-#ifdef DEBUG
- _mesa_warning(ctx, "Feedback buffer overflow");
-#endif
- result = -1;
- }
- else {
- result = ctx->Select.Hits;
- }
- ctx->Select.BufferCount = 0;
- ctx->Select.Hits = 0;
- ctx->Select.NameStackDepth = 0;
- break;
-#if _HAVE_FULL_GL
- case GL_FEEDBACK:
- if (ctx->Feedback.Count > ctx->Feedback.BufferSize) {
- /* overflow */
- result = -1;
- }
- else {
- result = ctx->Feedback.Count;
- }
- ctx->Feedback.Count = 0;
- break;
-#endif
- default:
- _mesa_error( ctx, GL_INVALID_ENUM, "glRenderMode" );
- return 0;
- }
-
- switch (mode) {
- case GL_RENDER:
- break;
- case GL_SELECT:
- if (ctx->Select.BufferSize==0) {
- /* haven't called glSelectBuffer yet */
- _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;
- }
-
- ctx->RenderMode = mode;
- if (ctx->Driver.RenderMode)
- ctx->Driver.RenderMode( ctx, 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;
-}
-
-/*@}*/
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.5
+ *
+ * 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"),
+ * 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.
+ */
+
+/**
+ * \file feedback.c
+ * Selection and feedback modes functions.
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "context.h"
+#include "enums.h"
+#include "feedback.h"
+#include "macros.h"
+#include "mfeatures.h"
+#include "mtypes.h"
+#include "main/dispatch.h"
+
+
+#if FEATURE_feedback
+
+
+#define FB_3D 0x01
+#define FB_4D 0x02
+#define FB_COLOR 0x04
+#define FB_TEXTURE 0X08
+
+
+
+static void GLAPIENTRY
+_mesa_FeedbackBuffer( GLsizei size, GLenum type, GLfloat *buffer )
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (ctx->RenderMode==GL_FEEDBACK) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glFeedbackBuffer" );
+ return;
+ }
+ if (size<0) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(size<0)" );
+ return;
+ }
+ if (!buffer && size > 0) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(buffer==NULL)" );
+ ctx->Feedback.BufferSize = 0;
+ return;
+ }
+
+ switch (type) {
+ case GL_2D:
+ ctx->Feedback._Mask = 0;
+ break;
+ case GL_3D:
+ ctx->Feedback._Mask = FB_3D;
+ break;
+ case GL_3D_COLOR:
+ ctx->Feedback._Mask = (FB_3D | FB_COLOR);
+ break;
+ case GL_3D_COLOR_TEXTURE:
+ ctx->Feedback._Mask = (FB_3D | FB_COLOR | FB_TEXTURE);
+ break;
+ case GL_4D_COLOR_TEXTURE:
+ ctx->Feedback._Mask = (FB_3D | FB_4D | FB_COLOR | FB_TEXTURE);
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glFeedbackBuffer" );
+ return;
+ }
+
+ FLUSH_VERTICES(ctx, _NEW_RENDERMODE); /* Always flush */
+ ctx->Feedback.Type = type;
+ ctx->Feedback.BufferSize = size;
+ ctx->Feedback.Buffer = buffer;
+ ctx->Feedback.Count = 0; /* Becaues of this. */
+}
+
+
+static void GLAPIENTRY
+_mesa_PassThrough( GLfloat token )
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (ctx->RenderMode==GL_FEEDBACK) {
+ FLUSH_VERTICES(ctx, 0);
+ _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(struct gl_context *ctx,
+ const GLfloat win[4],
+ const GLfloat color[4],
+ const GLfloat texcoord[4])
+{
+ _mesa_feedback_token( ctx, win[0] );
+ _mesa_feedback_token( ctx, win[1] );
+ if (ctx->Feedback._Mask & FB_3D) {
+ _mesa_feedback_token( ctx, win[2] );
+ }
+ if (ctx->Feedback._Mask & FB_4D) {
+ _mesa_feedback_token( ctx, win[3] );
+ }
+ if (ctx->Feedback._Mask & FB_COLOR) {
+ _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) {
+ _mesa_feedback_token( ctx, texcoord[0] );
+ _mesa_feedback_token( ctx, texcoord[1] );
+ _mesa_feedback_token( ctx, texcoord[2] );
+ _mesa_feedback_token( ctx, texcoord[3] );
+ }
+}
+
+
+/**********************************************************************/
+/** \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.
+ */
+static void GLAPIENTRY
+_mesa_SelectBuffer( GLsizei size, GLuint *buffer )
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (ctx->RenderMode==GL_SELECT) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glSelectBuffer" );
+ return; /* KW: added return */
+ }
+
+ FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
+ ctx->Select.Buffer = buffer;
+ ctx->Select.BufferSize = size;
+ ctx->Select.BufferCount = 0;
+ ctx->Select.HitFlag = GL_FALSE;
+ ctx->Select.HitMinZ = 1.0;
+ ctx->Select.HitMaxZ = 0.0;
+}
+
+
+/**
+ * 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++;
+}
+
+
+/**
+ * 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) {
+ ctx->Select.HitMinZ = z;
+ }
+ if (z > ctx->Select.HitMaxZ) {
+ ctx->Select.HitMaxZ = 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(struct gl_context *ctx)
+{
+ GLuint i;
+ GLuint zmin, zmax, zscale = (~0u);
+
+ /* HitMinZ and HitMaxZ are in [0,1]. Multiply these values by */
+ /* 2^32-1 and round to nearest unsigned integer. */
+
+ assert( ctx != NULL ); /* this line magically fixes a SunOS 5.x/gcc bug */
+ 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 );
+ for (i = 0; i < ctx->Select.NameStackDepth; i++) {
+ write_record( ctx, ctx->Select.NameStack[i] );
+ }
+
+ ctx->Select.Hits++;
+ ctx->Select.HitFlag = GL_FALSE;
+ ctx->Select.HitMinZ = 1.0;
+ ctx->Select.HitMaxZ = -1.0;
+}
+
+
+/**
+ * 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);
+ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+ /* Record the hit before the HitFlag is wiped out again. */
+ if (ctx->RenderMode == GL_SELECT) {
+ if (ctx->Select.HitFlag) {
+ write_hit_record( ctx );
+ }
+ }
+ ctx->Select.NameStackDepth = 0;
+ ctx->Select.HitFlag = GL_FALSE;
+ ctx->Select.HitMinZ = 1.0;
+ ctx->Select.HitMaxZ = 0.0;
+ ctx->NewState |= _NEW_RENDERMODE;
+}
+
+
+/**
+ * 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);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (ctx->RenderMode != GL_SELECT) {
+ return;
+ }
+ if (ctx->Select.NameStackDepth == 0) {
+ _mesa_error( ctx, GL_INVALID_OPERATION, "glLoadName" );
+ return;
+ }
+
+ FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
+
+ if (ctx->Select.HitFlag) {
+ write_hit_record( ctx );
+ }
+ if (ctx->Select.NameStackDepth < MAX_NAME_STACK_DEPTH) {
+ ctx->Select.NameStack[ctx->Select.NameStackDepth-1] = name;
+ }
+ else {
+ ctx->Select.NameStack[MAX_NAME_STACK_DEPTH-1] = name;
+ }
+}
+
+
+/**
+ * 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);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (ctx->RenderMode != GL_SELECT) {
+ return;
+ }
+
+ FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
+ if (ctx->Select.HitFlag) {
+ write_hit_record( ctx );
+ }
+ if (ctx->Select.NameStackDepth >= MAX_NAME_STACK_DEPTH) {
+ _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushName" );
+ }
+ else
+ ctx->Select.NameStack[ctx->Select.NameStackDepth++] = name;
+}
+
+
+/**
+ * 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);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (ctx->RenderMode != GL_SELECT) {
+ return;
+ }
+
+ FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
+ if (ctx->Select.HitFlag) {
+ write_hit_record( ctx );
+ }
+ if (ctx->Select.NameStackDepth == 0) {
+ _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopName" );
+ }
+ else
+ ctx->Select.NameStackDepth--;
+}
+
+/*@}*/
+
+
+/**********************************************************************/
+/** \name Render Mode */
+/*@{*/
+
+/**
+ * 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.
+ */
+static GLint GLAPIENTRY
+_mesa_RenderMode( GLenum mode )
+{
+ GET_CURRENT_CONTEXT(ctx);
+ GLint result;
+ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
+
+ if (MESA_VERBOSE & VERBOSE_API)
+ _mesa_debug(ctx, "glRenderMode %s\n", _mesa_lookup_enum_by_nr(mode));
+
+ FLUSH_VERTICES(ctx, _NEW_RENDERMODE);
+
+ switch (ctx->RenderMode) {
+ case GL_RENDER:
+ result = 0;
+ break;
+ case GL_SELECT:
+ if (ctx->Select.HitFlag) {
+ write_hit_record( ctx );
+ }
+ if (ctx->Select.BufferCount > ctx->Select.BufferSize) {
+ /* overflow */
+#ifdef DEBUG
+ _mesa_warning(ctx, "Feedback buffer overflow");
+#endif
+ result = -1;
+ }
+ else {
+ result = ctx->Select.Hits;
+ }
+ ctx->Select.BufferCount = 0;
+ ctx->Select.Hits = 0;
+ ctx->Select.NameStackDepth = 0;
+ break;
+#if _HAVE_FULL_GL
+ case GL_FEEDBACK:
+ if (ctx->Feedback.Count > ctx->Feedback.BufferSize) {
+ /* overflow */
+ result = -1;
+ }
+ else {
+ result = ctx->Feedback.Count;
+ }
+ ctx->Feedback.Count = 0;
+ break;
+#endif
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glRenderMode" );
+ return 0;
+ }
+
+ switch (mode) {
+ case GL_RENDER:
+ break;
+ case GL_SELECT:
+ if (ctx->Select.BufferSize==0) {
+ /* haven't called glSelectBuffer yet */
+ _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;
+ }
+
+ ctx->RenderMode = mode;
+ if (ctx->Driver.RenderMode)
+ ctx->Driver.RenderMode( ctx, 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;
+}
+
+/*@}*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-08 23:14:11 +0000