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Diffstat (limited to 'mesalib/src/mesa/swrast/swrast.h')
| -rw-r--r-- | mesalib/src/mesa/swrast/swrast.h | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/mesalib/src/mesa/swrast/swrast.h b/mesalib/src/mesa/swrast/swrast.h new file mode 100644 index 000000000..c319ca62f --- /dev/null +++ b/mesalib/src/mesa/swrast/swrast.h @@ -0,0 +1,292 @@ +/* + * Mesa 3-D graphics library + * 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 + * 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 swrast/swrast.h + * \brief Public interface to the software rasterization functions. + * \author Keith Whitwell <keith@tungstengraphics.com> + */ + +#ifndef SWRAST_H +#define SWRAST_H + +#include "main/mtypes.h" + +/** + * \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 + * 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. + * - Implement a translator from native vertices to swrast vertices. + * - On partial fallback (mix of accelerated and unaccelerated + * 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. + */ +typedef struct { + GLfloat attrib[FRAG_ATTRIB_MAX][4]; + GLchan color[4]; /** integer color */ + GLfloat pointSize; +} SWvertex; + + +/** + * Fixed point data type. + */ +typedef int GLfixed; + + +#define FRAG_ATTRIB_CI FRAG_ATTRIB_COL0 + + +struct swrast_device_driver; + + +/* These are the public-access functions exported from swrast. + */ + +extern GLboolean +_swrast_CreateContext( GLcontext *ctx ); + +extern void +_swrast_DestroyContext( GLcontext *ctx ); + +/* Get a (non-const) reference to the device driver struct for swrast. + */ +extern struct swrast_device_driver * +_swrast_GetDeviceDriverReference( GLcontext *ctx ); + +extern void +_swrast_Bitmap( GLcontext *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, + GLsizei width, GLsizei height, + GLenum type ); + +extern void +_swrast_DrawPixels( GLcontext *ctx, + GLint x, GLint y, + GLsizei width, GLsizei height, + 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_BlitFramebuffer(GLcontext *ctx, + GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, + GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, + GLbitfield mask, GLenum filter); + +extern void +_swrast_Clear(GLcontext *ctx, GLbitfield buffers); + +extern void +_swrast_Accum(GLcontext *ctx, GLenum op, GLfloat value); + + + +/* Reset the stipple counter + */ +extern void +_swrast_ResetLineStipple( GLcontext *ctx ); + +/** + * Indicates front/back facing for subsequent points/lines when drawing + * unfilled polygons. Needed for two-side stencil. + */ +extern void +_swrast_SetFacing(GLcontext *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 ); + +extern void +_swrast_Line( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1 ); + +extern void +_swrast_Triangle( GLcontext *ctx, const SWvertex *v0, + const SWvertex *v1, const SWvertex *v2 ); + +extern void +_swrast_Quad( GLcontext *ctx, + const SWvertex *v0, const SWvertex *v1, + const SWvertex *v2, const SWvertex *v3); + +extern void +_swrast_flush( GLcontext *ctx ); + +extern void +_swrast_render_primitive( GLcontext *ctx, GLenum mode ); + +extern void +_swrast_render_start( GLcontext *ctx ); + +extern void +_swrast_render_finish( GLcontext *ctx ); + +/* Tell the software rasterizer about core state changes. + */ +extern void +_swrast_InvalidateState( GLcontext *ctx, GLbitfield new_state ); + +/* Configure software rasterizer to match hardware rasterizer characteristics: + */ +extern void +_swrast_allow_vertex_fog( GLcontext *ctx, GLboolean value ); + +extern void +_swrast_allow_pixel_fog( GLcontext *ctx, GLboolean value ); + +/* Debug: + */ +extern void +_swrast_print_vertex( GLcontext *ctx, const SWvertex *v ); + + +/* + * Imaging fallbacks (a better solution should be found, perhaps + * moving all the imaging fallback code to a new module) + */ +extern void +_swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target, + GLenum internalFormat, + GLint x, GLint y, GLsizei width, + GLsizei height); +extern void +_swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target, + GLenum internalFormat, + GLint x, GLint y, GLsizei width); +extern void +_swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start, + GLint x, GLint y, GLsizei width); +extern void +_swrast_CopyColorTable( GLcontext *ctx, + GLenum target, GLenum internalformat, + GLint x, GLint y, GLsizei width); + + +/* + * Texture fallbacks. Could also live in a new module + * with the rest of the texture store fallbacks? + */ +extern void +_swrast_copy_teximage1d(GLcontext *ctx, GLenum target, GLint level, + GLenum internalFormat, + GLint x, GLint y, GLsizei width, GLint border); + +extern void +_swrast_copy_teximage2d(GLcontext *ctx, GLenum target, GLint level, + GLenum internalFormat, + GLint x, GLint y, GLsizei width, GLsizei height, + GLint border); + + +extern void +_swrast_copy_texsubimage1d(GLcontext *ctx, GLenum target, GLint level, + GLint xoffset, GLint x, GLint y, GLsizei width); + +extern void +_swrast_copy_texsubimage2d(GLcontext *ctx, + GLenum target, GLint level, + GLint xoffset, GLint yoffset, + GLint x, GLint y, GLsizei width, GLsizei height); + +extern void +_swrast_copy_texsubimage3d(GLcontext *ctx, + GLenum target, GLint level, + GLint xoffset, GLint yoffset, GLint zoffset, + GLint x, GLint y, GLsizei width, GLsizei height); + + +extern void +_swrast_eject_texture_images(GLcontext *ctx); + + + +/** + * 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)(GLcontext *ctx); + void (*SpanRenderFinish)(GLcontext *ctx); +}; + + + +#endif |