diff options
Diffstat (limited to 'src/mesa/main/dd.h')
| -rw-r--r-- | src/mesa/main/dd.h | 398 |
1 files changed, 33 insertions, 365 deletions
diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h index 1e3671b5e56..2dd3751faae 100644 --- a/src/mesa/main/dd.h +++ b/src/mesa/main/dd.h @@ -1,4 +1,4 @@ -/* $Id: dd.h,v 1.58 2001/03/12 00:48:37 gareth Exp $ */ +/* $Id: dd.h,v 1.59 2001/03/19 02:25:35 keithw Exp $ */ /* * Mesa 3-D graphics library @@ -33,74 +33,6 @@ struct gl_pixelstore_attrib; - -/* - * Device Driver (DD) interface - * - * - * All device driver functions are accessed through pointers in the - * dd_function_table struct (defined below) which is stored in the GLcontext - * struct. Since the device driver is strictly accessed trough a table of - * function pointers we can: - * 1. switch between a number of different device drivers at runtime. - * 2. use optimized functions dependant on current rendering state or - * frame buffer configuration. - * - * The function pointers in the dd_function_table struct are divided into - * two groups: mandatory and optional. - * Mandatory functions have to be implemented by every device driver. - * Optional functions may or may not be implemented by the device driver. - * The optional functions provide ways to take advantage of special hardware - * or optimized algorithms. - * - * The function pointers in the dd_function_table struct should first be - * initialized in the driver's "MakeCurrent" function. The "MakeCurrent" - * function is a little different in each device driver. See the X/Mesa, - * GLX, or OS/Mesa drivers for examples. - * - * Later, Mesa may call the dd_function_table's UpdateState() function. - * This function should initialize the dd_function_table's pointers again. - * The UpdateState() function is called whenever the core (GL) rendering - * state is changed in a way which may effect rasterization. For example, - * the TriangleFunc() pointer may have to point to different functions - * depending on whether smooth or flat shading is enabled. - * - * Note that the first argument to every device driver function is a - * GLcontext *. In turn, the GLcontext->DriverCtx pointer points to - * the driver-specific context struct. See the X/Mesa or OS/Mesa interface - * for an example. - * - * For more information about writing a device driver see the drivers - * in OSmesa/ and X/ for examples. - * - * Look below in the dd_function_table struct definition for descriptions - * of each device driver function. - * - * More function pointers may be added as required. - * - * - * Notes: - * ------ - * RGBA = red/green/blue/alpha - * CI = color index (color mapped mode) - * mono = all pixels have the same color or index - * - * The write_ functions all take an array of mask flags which indicate - * whether or not the pixel should be written. One special case exists - * in the write_color_span function: if the mask array is NULL, then - * draw all pixels. This is an optimization used for glDrawPixels(). - * - * IN ALL CASES: - * X coordinates start at 0 at the left and increase to the right - * Y coordinates start at 0 at the bottom and increase upward - * - */ - - - - - - /* Mask bits sent to the driver Clear() function */ #define DD_FRONT_LEFT_BIT FRONT_LEFT_BIT /* 1 */ #define DD_FRONT_RIGHT_BIT FRONT_RIGHT_BIT /* 2 */ @@ -111,35 +43,6 @@ struct gl_pixelstore_attrib; #define DD_ACCUM_BIT GL_ACCUM_BUFFER_BIT /* 0x00000200 */ - - - - - -/* Point, line, triangle, quadrilateral and rectangle rasterizer - * functions. These are specific to the tnl module and will shortly - * move to a driver interface specific to that module. - */ -typedef void (*points_func)( GLcontext *ctx, GLuint first, GLuint last ); - -typedef void (*line_func)( GLcontext *ctx, GLuint v1, GLuint v2 ); - -typedef void (*triangle_func)( GLcontext *ctx, - GLuint v1, GLuint v2, GLuint v3 ); - -typedef void (*quad_func)( GLcontext *ctx, GLuint v1, GLuint v2, - GLuint v3, GLuint v4 ); - -typedef void (*render_func)( GLcontext *ctx, GLuint start, GLuint count, - GLuint flags ); - -typedef void (*interp_func)( GLcontext *ctx, - GLfloat t, GLuint dst, GLuint in, GLuint out, - GLboolean force_boundary ); - -typedef void (*copy_pv_func)( GLcontext *ctx, GLuint dst, GLuint src ); - - /* * Device Driver function table. */ @@ -158,9 +61,9 @@ struct dd_function_table { void (*UpdateState)( GLcontext *ctx, GLuint new_state ); /* - * UpdateState() is called whenver Mesa thinks the device driver should - * update its state and/or the other pointers (such as PointsFunc, - * LineFunc, or TriangleFunc). + * UpdateState() is called to notify the driver after Mesa has made + * some internal state changes. This is in addition to any + * statechange callbacks Mesa may already have made. */ void (*Clear)( GLcontext *ctx, GLbitfield mask, GLboolean all, @@ -194,120 +97,11 @@ struct dd_function_table { * GL_NONE - disable buffer write in device driver. */ - void (*SetReadBuffer)( GLcontext *ctx, GLframebuffer *colorBuffer, - GLenum buffer ); - /* - * Specifies the current buffer for reading. - * colorBuffer will be one of: - * GL_FRONT_LEFT - this buffer always exists - * GL_BACK_LEFT - when double buffering - * GL_FRONT_RIGHT - when using stereo - * GL_BACK_RIGHT - when using stereo and double buffering - */ - void (*GetBufferSize)( GLcontext *ctx, GLuint *width, GLuint *height ); /* * Returns the width and height of the current color buffer. */ - - /*** - *** Functions for writing pixels to the frame buffer: - ***/ - - void (*WriteRGBASpan)( const GLcontext *ctx, - GLuint n, GLint x, GLint y, - CONST GLchan rgba[][4], const GLubyte mask[] ); - void (*WriteRGBSpan)( const GLcontext *ctx, - GLuint n, GLint x, GLint y, - CONST GLchan rgb[][3], const GLubyte mask[] ); - /* Write a horizontal run of RGBA or RGB pixels. - * If mask is NULL, draw all pixels. - * If mask is not null, only draw pixel [i] when mask [i] is true. - */ - - void (*WriteMonoRGBASpan)( const GLcontext *ctx, GLuint n, GLint x, GLint y, - const GLchan color[4], const GLubyte mask[] ); - /* Write a horizontal run of RGBA pixels all with the same color. - */ - - void (*WriteRGBAPixels)( const GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - CONST GLchan rgba[][4], const GLubyte mask[] ); - /* Write array of RGBA pixels at random locations. - */ - - void (*WriteMonoRGBAPixels)( const GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - const GLchan color[4], const GLubyte mask[] ); - /* Write an array of mono-RGBA pixels at random locations. - */ - - void (*WriteCI32Span)( const GLcontext *ctx, GLuint n, GLint x, GLint y, - const GLuint index[], const GLubyte mask[] ); - void (*WriteCI8Span)( const GLcontext *ctx, GLuint n, GLint x, GLint y, - const GLubyte index[], const GLubyte mask[] ); - /* Write a horizontal run of CI pixels. One function is for 32bpp - * indexes and the other for 8bpp pixels (the common case). You mus - * implement both for color index mode. - */ - - void (*WriteMonoCISpan)( const GLcontext *ctx, GLuint n, GLint x, GLint y, - GLuint colorIndex, const GLubyte mask[] ); - /* Write a horizontal run of color index pixels using the color index - * last specified by the Index() function. - */ - - void (*WriteCI32Pixels)( const GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - const GLuint index[], const GLubyte mask[] ); - /* - * Write a random array of CI pixels. - */ - - void (*WriteMonoCIPixels)( const GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - GLuint colorIndex, const GLubyte mask[] ); - /* Write a random array of color index pixels using the color index - * last specified by the Index() function. - */ - - - /*** - *** Functions to read pixels from frame buffer: - ***/ - - void (*ReadCI32Span)( const GLcontext *ctx, - GLuint n, GLint x, GLint y, GLuint index[] ); - /* Read a horizontal run of color index pixels. - */ - - void (*ReadRGBASpan)( const GLcontext *ctx, GLuint n, GLint x, GLint y, - GLchan rgba[][4] ); - /* Read a horizontal run of RGBA pixels. - */ - - void (*ReadCI32Pixels)( const GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - GLuint indx[], const GLubyte mask[] ); - /* Read a random array of CI pixels. - */ - - void (*ReadRGBAPixels)( const GLcontext *ctx, - GLuint n, const GLint x[], const GLint y[], - GLchan rgba[][4], const GLubyte mask[] ); - /* Read a random array of RGBA pixels. - */ - - - /********************************************************************** - *** Optional functions: these functions may or may not be *** - *** implemented by the device driver. If the device driver *** - *** doesn't implement them it should never touch these pointers *** - *** since Mesa will either set them to NULL or point them at a *** - *** fall-back function. *** - **********************************************************************/ - void (*Finish)( GLcontext *ctx ); /* * This is called whenever glFinish() is called. @@ -326,73 +120,6 @@ struct dd_function_table { /*** - *** For supporting hardware Z buffers: - *** Either ALL or NONE of these functions must be implemented! - *** NOTE that Each depth value is a 32-bit GLuint. If the depth - *** buffer is less than 32 bits deep then the extra upperbits are zero. - ***/ - - void (*WriteDepthSpan)( GLcontext *ctx, GLuint n, GLint x, GLint y, - const GLdepth depth[], const GLubyte mask[] ); - /* Write a horizontal span of values into the depth buffer. Only write - * depth[i] value if mask[i] is nonzero. - */ - - void (*ReadDepthSpan)( GLcontext *ctx, GLuint n, GLint x, GLint y, - GLdepth depth[] ); - /* Read a horizontal span of values from the depth buffer. - */ - - - void (*WriteDepthPixels)( GLcontext *ctx, GLuint n, - const GLint x[], const GLint y[], - const GLdepth depth[], const GLubyte mask[] ); - /* Write an array of randomly positioned depth values into the - * depth buffer. Only write depth[i] value if mask[i] is nonzero. - */ - - void (*ReadDepthPixels)( GLcontext *ctx, GLuint n, - const GLint x[], const GLint y[], - GLdepth depth[] ); - /* Read an array of randomly positioned depth values from the depth buffer. - */ - - - - /*** - *** For supporting hardware stencil buffers: - *** Either ALL or NONE of these functions must be implemented! - ***/ - - void (*WriteStencilSpan)( GLcontext *ctx, GLuint n, GLint x, GLint y, - const GLstencil stencil[], const GLubyte mask[] ); - /* Write a horizontal span of stencil values into the stencil buffer. - * If mask is NULL, write all stencil values. - * Else, only write stencil[i] if mask[i] is non-zero. - */ - - void (*ReadStencilSpan)( GLcontext *ctx, GLuint n, GLint x, GLint y, - GLstencil stencil[] ); - /* Read a horizontal span of stencil values from the stencil buffer. - */ - - void (*WriteStencilPixels)( GLcontext *ctx, GLuint n, - const GLint x[], const GLint y[], - const GLstencil stencil[], - const GLubyte mask[] ); - /* Write an array of stencil values into the stencil buffer. - * If mask is NULL, write all stencil values. - * Else, only write stencil[i] if mask[i] is non-zero. - */ - - void (*ReadStencilPixels)( GLcontext *ctx, GLuint n, - const GLint x[], const GLint y[], - GLstencil stencil[] ); - /* Read an array of stencil values from the stencil buffer. - */ - - - /*** *** For hardware accumulation buffer: ***/ void (*Accum)( GLcontext *ctx, GLenum op, GLfloat value, @@ -709,6 +436,27 @@ struct dd_function_table { * is to be updated. */ + /*** + *** Imaging functionality: + ***/ + void (*CopyColorTable)( GLcontext *ctx, + GLenum target, GLenum internalformat, + GLint x, GLint y, GLsizei width ); + + void (*CopyColorSubTable)( GLcontext *ctx, + GLenum target, GLsizei start, + GLint x, GLint y, GLsizei width ); + + void (*CopyConvolutionFilter1D)( GLcontext *ctx, GLenum target, + GLenum internalFormat, + GLint x, GLint y, GLsizei width ); + + void (*CopyConvolutionFilter2D)( GLcontext *ctx, GLenum target, + GLenum internalFormat, + GLint x, GLint y, + GLsizei width, GLsizei height ); + + /*** *** State-changing functions (drawing functions are above) @@ -768,17 +516,6 @@ struct dd_function_table { void (*Viewport)(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h); - /*** State-query functions - *** - *** Return GL_TRUE if query was completed, GL_FALSE otherwise. - ***/ - GLboolean (*GetBooleanv)(GLcontext *ctx, GLenum pname, GLboolean *result); - GLboolean (*GetDoublev)(GLcontext *ctx, GLenum pname, GLdouble *result); - GLboolean (*GetFloatv)(GLcontext *ctx, GLenum pname, GLfloat *result); - GLboolean (*GetIntegerv)(GLcontext *ctx, GLenum pname, GLint *result); - GLboolean (*GetPointerv)(GLcontext *ctx, GLenum pname, GLvoid **result); - - /*** *** Vertex array functions *** @@ -801,85 +538,16 @@ struct dd_function_table { void (*EdgeFlagPointer)(GLcontext *ctx, GLsizei stride, const GLvoid *ptr); - /*** - *** TNL Pipeline - ***/ - - void (*PipelineStart)(GLcontext *ctx); - void (*PipelineFinish)(GLcontext *ctx); - /* Called before and after all pipeline stages. - * These are a suitable place for grabbing/releasing hardware locks. - */ - - /*** - *** Rendering - ***/ - - void (*RenderStart)(GLcontext *ctx); - void (*RenderFinish)(GLcontext *ctx); - /* Called before and after all rendering operations, including DrawPixels, - * ReadPixels, Bitmap, span functions, and CopyTexImage, etc commands. - * These are a suitable place for grabbing/releasing hardware locks. - */ - - void (*RenderPrimitive)(GLcontext *ctx, GLenum mode); - /* Called between RednerStart() and RenderFinish() to indicate the - * type of primitive we're about to draw. Mode will be one of the - * modes accepted by glBegin(). - */ - - interp_func RenderInterp; - copy_pv_func RenderCopyPV; - void (*RenderClippedPolygon)( GLcontext *ctx, const GLuint *elts, GLuint n ); - void (*RenderClippedLine)( GLcontext *ctx, GLuint v0, GLuint v1 ); - /* Functions to interpolate between prebuilt vertices, copy flat-shade - * provoking color, and to render clipped primitives. - */ - - /*** - *** Parameters for _tnl_render_stage + /*** State-query functions + *** + *** Return GL_TRUE if query was completed, GL_FALSE otherwise. ***/ - points_func PointsFunc; /* must now respect vb->elts */ - line_func LineFunc; - triangle_func TriangleFunc; - quad_func QuadFunc; - /* These functions are called in order to render points, lines, - * triangles and quads. These are only called via the T&L module. - */ - - render_func *RenderTabVerts; - render_func *RenderTabElts; - /* Render whole unclipped primitives (points, lines, linestrips, - * lineloops, etc). The tables are indexed by the GL enum of the - * primitive to be rendered. - */ - - void (*ResetLineStipple)( GLcontext *ctx ); - /* Reset the hardware's line stipple counter. - */ - - void (*BuildProjectedVertices)( GLcontext *ctx, - GLuint start, GLuint end, - GLuint new_inputs); - /* This function is called whenever new vertices are required for - * rendering. The vertices in question are those n such that start - * <= n < end. The new_inputs parameter indicates those fields of - * the vertex which need to be updated, if only a partial repair of - * the vertex is required. - * - * This function is called only from _tnl_render_stage in tnl/t_render.c. - */ - + GLboolean (*GetBooleanv)(GLcontext *ctx, GLenum pname, GLboolean *result); + GLboolean (*GetDoublev)(GLcontext *ctx, GLenum pname, GLdouble *result); + GLboolean (*GetFloatv)(GLcontext *ctx, GLenum pname, GLfloat *result); + GLboolean (*GetIntegerv)(GLcontext *ctx, GLenum pname, GLint *result); + GLboolean (*GetPointerv)(GLcontext *ctx, GLenum pname, GLvoid **result); - GLboolean (*MultipassFunc)( GLcontext *ctx, GLuint passno ); - /* Driver may request additional render passes by returning GL_TRUE - * when this function is called. This function will be called - * after the first pass, and passes will be made until the function - * returns GL_FALSE. If no function is registered, only one pass - * is made. - * - * This function will be first invoked with passno == 1. - */ /*** |