Reorganized software rasterizer as a module which manages its own state,

with tighter interfaces with the rest of the world.

Proper documentation to come.

1 files changed, 145 insertions, 0 deletions

diff --git a/src/mesa/swrast/s_context.h b/src/mesa/swrast/s_context.h
new file mode 100644
index 00000000000..493758ad695
--- /dev/null
+++ b/src/mesa/swrast/s_context.h
@@ -0,0 +1,145 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.5
+ * 
+ * Copyright (C) 1999  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.
+ *
+ * Authors:
+ *    Keith Whitwell <[email protected]>
+ */
+
+#ifndef S_CONTEXT_H
+#define S_CONTEXT_H
+
+#include "types.h"
+#include "swrast.h"
+
+/*
+ * For texture sampling:
+ */
+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] );
+
+
+
+/*
+ * Blending function
+ */
+#ifdef USE_MMX_ASM
+typedef void (_ASMAPIP blend_func)( GLcontext *ctx, GLuint n,
+                                    const GLubyte mask[],
+                                    GLchan src[][4], CONST GLchan dst[][4] );
+#else
+typedef void (*blend_func)( GLcontext *ctx, GLuint n, const GLubyte mask[],
+                            GLchan src[][4], CONST GLchan dst[][4] );
+#endif
+
+typedef void (*swrast_tri_func)( GLcontext *ctx, 
+				 SWvertex *, SWvertex *, SWvertex *);
+typedef void (*swrast_line_func)( GLcontext *ctx, SWvertex *, SWvertex *);
+typedef void (*swrast_point_func)( GLcontext *ctx, SWvertex *);
+
+/*
+ * 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 _SWRAST_NEW_RASTERMASK (_NEW_BUFFERS|	\
+			        _NEW_SCISSOR|	\
+			        _NEW_COLOR|	\
+			        _NEW_DEPTH|	\
+			        _NEW_FOG|	\
+			        _NEW_STENCIL|	\
+			        _NEW_TEXTURE|	\
+			        _NEW_VIEWPORT|	\
+			        _NEW_DEPTH)
+
+
+
+typedef struct
+{
+   GLuint NewState;
+   GLuint StateChanges;
+
+   GLuint _RasterMask;
+   GLuint _MinMagThresh[MAX_TEXTURE_UNITS];
+
+   struct pixel_buffer* PB;
+   GLuint StippleCounter;    /* Line stipple counter */
+
+
+   /* Mechanism to allow driver (like X11) to register further
+    * software rasterization routines.
+    */
+   void (*choose_point)( GLcontext * );
+   void (*choose_line)( GLcontext * );
+   void (*choose_triangle)( GLcontext * );
+   void (*choose_quad)( GLcontext * );
+
+   GLuint invalidate_point;
+   GLuint invalidate_line;
+   GLuint invalidate_triangle;
+   GLuint invalidate_quad;
+
+
+   /* Function pointers for dispatch behind public entrypoints.
+    */
+   void (*InvalidateState)( GLcontext *ctx, GLuint new_state );
+   void (*Point)( GLcontext *ctx, SWvertex *v );
+   void (*Line)( GLcontext *ctx, SWvertex *v0, SWvertex *v1 );
+   void (*Triangle)( GLcontext *ctx, SWvertex *v0, SWvertex *v1, SWvertex *v2 );
+   void (*Quad)( GLcontext *ctx, SWvertex *v0, SWvertex *v1, SWvertex *v2, 
+		 SWvertex *v3);
+
+   /* Internal hooks, kept uptodate by the same mechanism as above.
+    */
+   blend_func BlendFunc;
+   TextureSampleFunc TextureSample[MAX_TEXTURE_UNITS];
+
+} SWcontext;
+
+
+void
+_swrast_validate_derived( GLcontext *ctx );
+
+
+#define SWRAST_CONTEXT(ctx) ((SWcontext *)ctx->swrast_context)
+
+
+
+#endif