+/* $Id: s_context.h,v 1.22 2002/10/29 20:29:00 brianp Exp $ */
+
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 4.1
*
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2002 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"),
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
- * Keith Whitwell <keithw@valinux.com>
+ * Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+/**
+ * \file swrast/s_context.h
+ * \brief fill in description
+ * \author Keith Whitwell <keith@tungstengraphics.com>
*/
#ifndef S_CONTEXT_H
*/
typedef void (*TextureSampleFunc)( GLcontext *ctx, GLuint texUnit,
const struct gl_texture_object *tObj,
- GLuint n,
- const GLfloat s[], const GLfloat t[],
- const GLfloat u[], const GLfloat lambda[],
- GLchan rgba[][4] );
+ GLuint n, GLfloat texcoords[][4],
+ const GLfloat lambda[], GLchan rgba[][4] );
const SWvertex *, const SWvertex *);
-
-/*
- * Bitmasks to indicate which rasterization options are enabled (RasterMask)
+/** \defgroup Bitmasks
+ * Bitmasks to indicate which rasterization options are enabled
+ * (RasterMask)
*/
-#define ALPHATEST_BIT 0x001 /* Alpha-test pixels */
-#define BLEND_BIT 0x002 /* Blend pixels */
-#define DEPTH_BIT 0x004 /* Depth-test pixels */
-#define FOG_BIT 0x008 /* Fog pixels */
-#define LOGIC_OP_BIT 0x010 /* Apply logic op in software */
-#define SCISSOR_BIT 0x020 /* Scissor pixels */
-#define STENCIL_BIT 0x040 /* Stencil pixels */
-#define MASKING_BIT 0x080 /* Do glColorMask or glIndexMask */
-#define ALPHABUF_BIT 0x100 /* Using software alpha buffer */
-#define WINCLIP_BIT 0x200 /* Clip pixels/primitives to window */
-#define MULTI_DRAW_BIT 0x400 /* Write to more than one color- */
- /* buffer or no buffers. */
-#define OCCLUSION_BIT 0x800 /* GL_HP_occlusion_test enabled */
-#define TEXTURE_BIT 0x1000 /* Texturing really enabled */
-
+/*@{*/
+#define ALPHATEST_BIT 0x001 /**< Alpha-test pixels */
+#define BLEND_BIT 0x002 /**< Blend pixels */
+#define DEPTH_BIT 0x004 /**< Depth-test pixels */
+#define FOG_BIT 0x008 /**< Fog pixels */
+#define LOGIC_OP_BIT 0x010 /**< Apply logic op in software */
+#define CLIP_BIT 0x020 /**< Scissor or window clip pixels */
+#define STENCIL_BIT 0x040 /**< Stencil pixels */
+#define MASKING_BIT 0x080 /**< Do glColorMask or glIndexMask */
+#define ALPHABUF_BIT 0x100 /**< Using software alpha buffer */
+#define MULTI_DRAW_BIT 0x400 /**< Write to more than one color- */
+ /**< buffer or no buffers. */
+#define OCCLUSION_BIT 0x800 /**< GL_HP_occlusion_test enabled */
+#define TEXTURE_BIT 0x1000 /**< Texturing really enabled */
+/*@}*/
#define _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS| \
_NEW_SCISSOR| \
_NEW_DEPTH)
-
+/**
+ * \struct SWcontext
+ * \brief SWContext?
+ */
typedef struct
{
- /* Configuration mechanisms to make software rasterizer match
+ /** Driver interface:
+ */
+ struct swrast_device_driver Driver;
+
+ /** Configuration mechanisms to make software rasterizer match
* characteristics of the hardware rasterizer (if present):
*/
GLboolean AllowVertexFog;
GLboolean AllowPixelFog;
- /* Derived values, invalidated on statechanges, updated from
+ /** Derived values, invalidated on statechanges, updated from
* _swrast_validate_derived():
*/
GLuint _RasterMask;
- GLboolean _MultiTextureEnabled;
- GLuint _MinMagThresh[MAX_TEXTURE_UNITS];
+ GLfloat _MinMagThresh[MAX_TEXTURE_UNITS];
GLfloat _backface_sign;
GLboolean _PreferPixelFog;
+ GLboolean _AnyTextureCombine;
/* Accum buffer temporaries.
*/
- GLboolean _IntegerAccumMode; /* Storing unscaled integers? */
- GLfloat _IntegerAccumScaler; /* Implicit scale factor */
+ GLboolean _IntegerAccumMode; /**< Storing unscaled integers? */
+ GLfloat _IntegerAccumScaler; /**< Implicit scale factor */
/* Working values:
*/
- struct pixel_buffer* PB;
- GLuint StippleCounter; /* Line stipple counter */
+ GLuint StippleCounter; /**< Line stipple counter */
GLuint NewState;
GLuint StateChanges;
+ GLenum Primitive; /* current primitive being drawn (ala glBegin) */
+ GLuint CurrentBuffer; /* exactly one of FRONT_LEFT_BIT, BACK_LEFT_BIT, etc*/
- /* Mechanism to allow driver (like X11) to register further
+ /** Mechanism to allow driver (like X11) to register further
* software rasterization routines.
*/
+ /*@{*/
void (*choose_point)( GLcontext * );
void (*choose_line)( GLcontext * );
void (*choose_triangle)( GLcontext * );
GLuint invalidate_point;
GLuint invalidate_line;
GLuint invalidate_triangle;
+ /*@}*/
-
- /* Function pointers for dispatch behind public entrypoints.
- */
+ /** Function pointers for dispatch behind public entrypoints. */
+ /*@{*/
void (*InvalidateState)( GLcontext *ctx, GLuint new_state );
swrast_point_func Point;
swrast_line_func Line;
swrast_tri_func Triangle;
+ /*@}*/
- /* Placeholders for when seperate specular (or secondary color) is
- * enabled but texturing is not.
+ /**
+ * Placeholders for when separate specular (or secondary color) is
+ * enabled but texturing is not.
*/
+ /*@{*/
swrast_point_func SpecPoint;
swrast_line_func SpecLine;
swrast_tri_func SpecTriangle;
+ /*@}*/
+ /**
+ * Typically, we'll allocate a sw_span structure as a local variable
+ * and set its 'array' pointer to point to this object. The reason is
+ * this object is big and causes problems when allocated on the stack
+ * on some systems.
+ */
+ struct span_arrays *SpanArrays;
+
+ /**
+ * Used to buffer N GL_POINTS, instead of rendering one by one.
+ */
+ struct sw_span PointSpan;
- /* Internal hooks, kept uptodate by the same mechanism as above.
+ /** Internal hooks, kept uptodate by the same mechanism as above.
*/
blend_func BlendFunc;
TextureSampleFunc TextureSample[MAX_TEXTURE_UNITS];
+ /** Buffer for saving the sampled texture colors.
+ * Needed for GL_ARB_texture_env_crossbar implementation.
+ */
+ GLchan *TexelBuffer;
+
} SWcontext;
-void
+extern void
_swrast_validate_derived( GLcontext *ctx );
#define SWRAST_CONTEXT(ctx) ((SWcontext *)ctx->swrast_context)
+#define RENDER_START(SWctx, GLctx) \
+ do { \
+ if ((SWctx)->Driver.SpanRenderStart) { \
+ (*(SWctx)->Driver.SpanRenderStart)(GLctx); \
+ } \
+ } while (0)
+
+#define RENDER_FINISH(SWctx, GLctx) \
+ do { \
+ if ((SWctx)->Driver.SpanRenderFinish) { \
+ (*(SWctx)->Driver.SpanRenderFinish)(GLctx); \
+ } \
+ } while (0)
+
+/*
+ * XXX these macros are just bandages for now in order to make
+ * CHAN_BITS==32 compile cleanly.
+ * These should probably go elsewhere at some point.
+ */
+#if CHAN_TYPE == GL_FLOAT
+#define ChanToFixed(X) (X)
+#define FixedToChan(X) (X)
+#else
+#define ChanToFixed(X) IntToFixed(X)
+#define FixedToChan(X) FixedToInt(X)
+#endif
+
#endif
projects / mesa.git / blobdiff