/*
* Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
+ * Version: 6.5
+ *
+ * Copyright (C) 1999-2006 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
* 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 <keithw@valinux.com>
+ */
+
+/**
+ * \file swrast/swrast.h
+ * \brief Public interface to the software rasterization functions.
+ * \author Keith Whitwell <keith@tungstengraphics.com>
*/
#ifndef SWRAST_H
#define SWRAST_H
-#include "types.h"
+#include "main/mtypes.h"
+#include "swrast/s_chan.h"
+/**
+ * If non-zero use GLdouble for walking triangle edges, for better accuracy.
+ */
+#define TRIANGLE_WALK_DOUBLE 0
-/* The software rasterizer now uses this format for vertices. Thus a
+
+/**
+ * Bits per depth buffer value (max is 32).
+ */
+#ifndef DEFAULT_SOFTWARE_DEPTH_BITS
+#define DEFAULT_SOFTWARE_DEPTH_BITS 16
+#endif
+/** Depth buffer data type */
+#if DEFAULT_SOFTWARE_DEPTH_BITS <= 16
+#define DEFAULT_SOFTWARE_DEPTH_TYPE GLushort
+#else
+#define DEFAULT_SOFTWARE_DEPTH_TYPE GLuint
+#endif
+
+
+/**
+ * Max image/surface/texture size.
+ */
+#define SWRAST_MAX_WIDTH 16384
+#define SWRAST_MAX_HEIGHT 16384
+
+
+/**
+ * \struct SWvertex
+ * \brief Data-structure to handle vertices in the software rasterizer.
+ *
+ * The software rasterizer now uses this format for vertices. Thus a
* 'RasterSetup' stage or other translation is required between the
* tnl module and the swrast rasterization functions. This serves to
* isolate the swrast module from the internals of the tnl module, and
* improve its usefulness as a fallback mechanism for hardware
* drivers.
*
+ * wpos = attr[FRAG_ATTRIB_WPOS] and MUST BE THE FIRST values in the
+ * vertex because of the tnl clipping code.
+
+ * wpos[0] and [1] are the screen-coords of SWvertex.
+ * wpos[2] is the z-buffer coord (if 16-bit Z buffer, in range [0,65535]).
+ * wpos[3] is 1/w where w is the clip-space W coord. This is the value
+ * that clip{XYZ} were multiplied by to get ndc{XYZ}.
+ *
* Full software drivers:
- * - Register the rastersetup and triangle functions from
+ * - Register the rastersetup and triangle functions from
* utils/software_helper.
* - On statechange, update the rasterization pointers in that module.
- *
+ *
* Rasterization hardware drivers:
* - Keep native rastersetup.
* - Implement native twoside,offset and unfilled triangle setup.
* prims), call a pass-through function which translates native
* vertices to SWvertices and calls the appropriate swrast function.
* - On total fallback (vertex format insufficient for state or all
- * primitives unaccelerated), hook in swrast_setup instead.
+ * primitives unaccelerated), hook in swrast_setup instead.
*/
typedef struct {
- GLfloat win[4];
- GLfloat eye[4]; /* for GL_EXT_point_param only */
- GLfloat texcoord[MAX_TEXTURE_UNITS][4];
- GLchan color[4];
- GLchan specular[4];
- GLfloat fog;
- GLuint index;
+ GLfloat attrib[FRAG_ATTRIB_MAX][4];
+ GLchan color[4]; /** integer color */
+ GLfloat pointSize;
} SWvertex;
+#define FRAG_ATTRIB_CI FRAG_ATTRIB_COL0
+
+struct swrast_device_driver;
-/* These are the public-access functions exported from swrast.
+
+/* These are the public-access functions exported from swrast.
*/
-extern void
-_swrast_alloc_buffers( GLcontext *ctx );
extern GLboolean
-_swrast_CreateContext( GLcontext *ctx );
+_swrast_CreateContext( struct gl_context *ctx );
extern void
-_swrast_DestroyContext( GLcontext *ctx );
-
+_swrast_DestroyContext( struct gl_context *ctx );
+/* Get a (non-const) reference to the device driver struct for swrast.
+ */
+extern struct swrast_device_driver *
+_swrast_GetDeviceDriverReference( struct gl_context *ctx );
-extern void
-_swrast_Bitmap( GLcontext *ctx,
+extern void
+_swrast_Bitmap( struct gl_context *ctx,
GLint px, GLint py,
GLsizei width, GLsizei height,
const struct gl_pixelstore_attrib *unpack,
const GLubyte *bitmap );
extern void
-_swrast_CopyPixels( GLcontext *ctx,
- GLint srcx, GLint srcy,
- GLint destx, GLint desty,
+_swrast_CopyPixels( struct gl_context *ctx,
+ GLint srcx, GLint srcy,
+ GLint destx, GLint desty,
GLsizei width, GLsizei height,
GLenum type );
+extern GLboolean
+swrast_fast_copy_pixels(struct gl_context *ctx,
+ GLint srcX, GLint srcY, GLsizei width, GLsizei height,
+ GLint dstX, GLint dstY, GLenum type);
+
extern void
-_swrast_DrawPixels( GLcontext *ctx,
+_swrast_DrawPixels( struct gl_context *ctx,
GLint x, GLint y,
GLsizei width, GLsizei height,
- GLenum format, GLenum type,
+ GLenum format, GLenum type,
const struct gl_pixelstore_attrib *unpack,
const GLvoid *pixels );
extern void
-_swrast_ReadPixels( GLcontext *ctx,
- GLint x, GLint y, GLsizei width, GLsizei height,
- GLenum format, GLenum type,
- const struct gl_pixelstore_attrib *unpack,
- GLvoid *pixels );
-
-extern void
-_swrast_Clear( GLcontext *ctx, GLbitfield mask, GLboolean all,
- GLint x, GLint y, GLint width, GLint height );
+_swrast_BlitFramebuffer(struct gl_context *ctx,
+ GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+ GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+ GLbitfield mask, GLenum filter);
extern void
-_swrast_Accum( GLcontext *ctx, GLenum op,
- GLfloat value, GLint xpos, GLint ypos,
- GLint width, GLint height );
+_swrast_Clear(struct gl_context *ctx, GLbitfield buffers);
+
-/* Get a pointer to the stipple counter.
+/* Reset the stipple counter
*/
-extern GLuint *
-_swrast_get_stipple_counter_ref( GLcontext *ctx );
+extern void
+_swrast_ResetLineStipple( struct gl_context *ctx );
+/**
+ * Indicates front/back facing for subsequent points/lines when drawing
+ * unfilled polygons. Needed for two-side stencil.
+ */
+extern void
+_swrast_SetFacing(struct gl_context *ctx, GLuint facing);
/* These will always render the correct point/line/triangle for the
* current state.
+ *
+ * For flatshaded primitives, the provoking vertex is the final one.
*/
extern void
-_swrast_Point( GLcontext *ctx, const SWvertex *v );
+_swrast_Point( struct gl_context *ctx, const SWvertex *v );
extern void
-_swrast_Line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 );
+_swrast_Line( struct gl_context *ctx, const SWvertex *v0, const SWvertex *v1 );
extern void
-_swrast_Triangle( GLcontext *ctx, const SWvertex *v0,
+_swrast_Triangle( struct gl_context *ctx, const SWvertex *v0,
const SWvertex *v1, const SWvertex *v2 );
extern void
-_swrast_Quad( GLcontext *ctx,
+_swrast_Quad( struct gl_context *ctx,
const SWvertex *v0, const SWvertex *v1,
const SWvertex *v2, const SWvertex *v3);
-extern void
-_swrast_flush( GLcontext *ctx );
+extern void
+_swrast_flush( struct gl_context *ctx );
+
+extern void
+_swrast_render_primitive( struct gl_context *ctx, GLenum mode );
+extern void
+_swrast_render_start( struct gl_context *ctx );
+
+extern void
+_swrast_render_finish( struct gl_context *ctx );
+
+extern struct gl_texture_image *
+_swrast_new_texture_image( struct gl_context *ctx );
+
+extern void
+_swrast_delete_texture_image(struct gl_context *ctx,
+ struct gl_texture_image *texImage);
+
+extern GLboolean
+_swrast_alloc_texture_image_buffer(struct gl_context *ctx,
+ struct gl_texture_image *texImage);
+
+extern void
+_swrast_init_texture_image(struct gl_texture_image *texImage);
+
+extern void
+_swrast_free_texture_image_buffer(struct gl_context *ctx,
+ struct gl_texture_image *texImage);
+
+extern void
+_swrast_map_teximage(struct gl_context *ctx,
+ struct gl_texture_image *texImage,
+ GLuint slice,
+ GLuint x, GLuint y, GLuint w, GLuint h,
+ GLbitfield mode,
+ GLubyte **mapOut,
+ GLint *rowStrideOut);
+
+extern void
+_swrast_unmap_teximage(struct gl_context *ctx,
+ struct gl_texture_image *texImage,
+ GLuint slice);
/* Tell the software rasterizer about core state changes.
*/
extern void
-_swrast_InvalidateState( GLcontext *ctx, GLuint new_state );
+_swrast_InvalidateState( struct gl_context *ctx, GLbitfield new_state );
/* Configure software rasterizer to match hardware rasterizer characteristics:
*/
extern void
-_swrast_allow_vertex_fog( GLcontext *ctx, GLboolean value );
+_swrast_allow_vertex_fog( struct gl_context *ctx, GLboolean value );
extern void
-_swrast_allow_pixel_fog( GLcontext *ctx, GLboolean value );
+_swrast_allow_pixel_fog( struct gl_context *ctx, GLboolean value );
+
+/* Debug:
+ */
+extern void
+_swrast_print_vertex( struct gl_context *ctx, const SWvertex *v );
+
+
+
+extern void
+_swrast_eject_texture_images(struct gl_context *ctx);
+
+
+extern void
+_swrast_render_texture(struct gl_context *ctx,
+ struct gl_framebuffer *fb,
+ struct gl_renderbuffer_attachment *att);
+
+extern void
+_swrast_finish_render_texture(struct gl_context *ctx,
+ struct gl_renderbuffer_attachment *att);
+
+
+
+extern GLboolean
+_swrast_AllocTextureStorage(struct gl_context *ctx,
+ struct gl_texture_object *texObj,
+ GLsizei levels, GLsizei width,
+ GLsizei height, GLsizei depth);
+
+
+/**
+ * The driver interface for the software rasterizer.
+ * XXX this may go away.
+ * We may move these functions to ctx->Driver.RenderStart, RenderEnd.
+ */
+struct swrast_device_driver {
+ /*
+ * These are called before and after accessing renderbuffers during
+ * software rasterization.
+ *
+ * These are a suitable place for grabbing/releasing hardware locks.
+ *
+ * NOTE: The swrast triangle/line/point routines *DO NOT* call
+ * these functions. Locking in that case must be organized by the
+ * driver by other mechanisms.
+ */
+ void (*SpanRenderStart)(struct gl_context *ctx);
+ void (*SpanRenderFinish)(struct gl_context *ctx);
+};
+
+
#endif