| /* $Id: dd.h,v 1.41 2000/11/14 17:40:13 brianp Exp $ */ |
| |
| /* |
| * Mesa 3-D graphics library |
| * Version: 3.5 |
| * |
| * Copyright (C) 1999-2000 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. |
| */ |
| |
| |
| |
| #ifndef DD_INCLUDED |
| #define DD_INCLUDED |
| |
| /* THIS FILE ONLY INCLUDED BY types.h !!!!! */ |
| |
| |
| struct gl_pixelstore_attrib; |
| struct vertex_buffer; |
| struct immediate; |
| struct gl_pipeline; |
| struct gl_pipeline_stage; |
| |
| |
| |
| /* |
| * 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 ddsample.c |
| * file and other device drivers (X/xmesa[1234].c, OSMesa/osmesa.c, etc) |
| * for examples. |
| * |
| * |
| * Look below in the dd_function_table struct definition for descriptions |
| * of each device driver function. |
| * |
| * |
| * In the future more function pointers may be added for glReadPixels |
| * glCopyPixels, etc. |
| * |
| * |
| * 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 */ |
| #define DD_BACK_LEFT_BIT BACK_LEFT_BIT /* 4 */ |
| #define DD_BACK_RIGHT_BIT BACK_RIGHT_BIT /* 8 */ |
| #define DD_DEPTH_BIT GL_DEPTH_BUFFER_BIT /* 0x00000100 */ |
| #define DD_STENCIL_BIT GL_STENCIL_BUFFER_BIT /* 0x00000400 */ |
| #define DD_ACCUM_BIT GL_ACCUM_BUFFER_BIT /* 0x00000200 */ |
| |
| |
| |
| /* |
| * Device Driver function table. |
| */ |
| struct dd_function_table { |
| |
| /********************************************************************** |
| *** Mandatory functions: these functions must be implemented by *** |
| *** every device driver. *** |
| **********************************************************************/ |
| |
| const GLubyte * (*GetString)( GLcontext *ctx, GLenum name ); |
| /* Return a string as needed by glGetString(). |
| * Only the GL_RENDERER token must be implemented. Otherwise, |
| * NULL can be returned. |
| */ |
| |
| GLuint UpdateStateNotify; |
| /* |
| * Tell mesa exactly when to call UpdateState. This is a bitwise |
| * or of the _NEW_* flags defined in types.h. |
| */ |
| |
| void (*UpdateState)( GLcontext *ctx ); |
| /* |
| * UpdateState() is called whenver Mesa thinks the device driver should |
| * update its state and/or the other pointers (such as PointsFunc, |
| * LineFunc, or TriangleFunc). |
| */ |
| |
| void (*ClearIndex)( GLcontext *ctx, GLuint index ); |
| /* |
| * Called whenever glClearIndex() is called. Set the index for clearing |
| * the color buffer when in color index mode. |
| */ |
| |
| void (*ClearColor)( GLcontext *ctx, GLchan red, GLchan green, |
| GLchan blue, GLchan alpha ); |
| /* |
| * Called whenever glClearColor() is called. Set the color for clearing |
| * the color buffer when in RGBA mode. |
| */ |
| |
| GLbitfield (*Clear)( GLcontext *ctx, GLbitfield mask, GLboolean all, |
| GLint x, GLint y, GLint width, GLint height ); |
| /* Clear the color/depth/stencil/accum buffer(s). |
| * 'mask' is a bitmask of the DD_*_BIT values defined above that indicates |
| * which buffers need to be cleared. The driver should clear those |
| * buffers then return a new bitmask indicating which buffers should be |
| * cleared by software Mesa. |
| * If 'all' is true then the clear the whole buffer, else clear only the |
| * region defined by (x,y,width,height). |
| * This function must obey the glColorMask, glIndexMask and glStencilMask |
| * settings! Software Mesa can do masked clears if the device driver can't. |
| */ |
| |
| GLboolean (*SetDrawBuffer)( GLcontext *ctx, GLenum buffer ); |
| /* |
| * Specifies the current buffer for writing. |
| * The following values must be accepted when applicable: |
| * 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 |
| * The folowing values may optionally be accepted. Return GL_TRUE |
| * if accepted, GL_FALSE if not accepted. In practice, only drivers |
| * which can write to multiple color buffers at once should accept |
| * these values. |
| * GL_FRONT - write to front left and front right if it exists |
| * GL_BACK - write to back left and back right if it exists |
| * GL_LEFT - write to front left and back left if it exists |
| * GL_RIGHT - write to right left and back right if they exist |
| * GL_FRONT_AND_BACK - write to all four buffers if they exist |
| * 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. |
| */ |
| |
| void (*Flush)( GLcontext *ctx ); |
| /* |
| * This is called whenever glFlush() is called. |
| */ |
| |
| void (*Error)( GLcontext *ctx ); |
| /* |
| * Called whenever an error is generated. ctx->ErrorValue contains |
| * the error value. |
| */ |
| |
| void (*NearFar)( GLcontext *ctx, GLfloat nearVal, GLfloat farVal ); |
| /* |
| * Called from glFrustum and glOrtho to tell device driver the |
| * near and far clipping plane Z values. The 3Dfx driver, for example, |
| * uses this. |
| */ |
| |
| |
| /*** |
| *** 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. |
| */ |
| |
| |
| /*** |
| *** glDraw/Read/CopyPixels and glBitmap functions: |
| ***/ |
| |
| GLboolean (*DrawPixels)( GLcontext *ctx, |
| GLint x, GLint y, GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLvoid *pixels ); |
| /* This is called by glDrawPixels. |
| * 'unpack' describes how to unpack the source image data. |
| * Return GL_TRUE if the driver succeeds, return GL_FALSE if core Mesa |
| * must do the job. |
| */ |
| |
| GLboolean (*ReadPixels)( GLcontext *ctx, |
| GLint x, GLint y, GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const struct gl_pixelstore_attrib *unpack, |
| GLvoid *dest ); |
| /* Called by glReadPixels. |
| * Return GL_TRUE if operation completed, else return GL_FALSE. |
| * This function must respect all glPixelTransfer settings. |
| */ |
| |
| GLboolean (*CopyPixels)( GLcontext *ctx, |
| GLint srcx, GLint srcy, |
| GLsizei width, GLsizei height, |
| GLint dstx, GLint dsty, GLenum type ); |
| /* Do a glCopyPixels. Return GL_TRUE if operation completed, else |
| * return GL_FALSE. This function must respect all rasterization |
| * state, glPixelTransfer, glPixelZoom, etc. |
| */ |
| |
| GLboolean (*Bitmap)( GLcontext *ctx, |
| GLint x, GLint y, GLsizei width, GLsizei height, |
| const struct gl_pixelstore_attrib *unpack, |
| const GLubyte *bitmap ); |
| /* This is called by glBitmap. Works the same as DrawPixels, above. |
| */ |
| |
| GLboolean (*Accum)( GLcontext *ctx, GLenum op, |
| GLfloat value, GLint xpos, GLint ypos, |
| GLint width, GLint height ); |
| /* Hardware accum buffer. |
| */ |
| |
| /*** |
| *** Texture mapping functions: |
| ***/ |
| |
| GLboolean (*TexImage1D)( GLcontext *ctx, GLenum target, GLint level, |
| GLenum format, GLenum type, const GLvoid *pixels, |
| const struct gl_pixelstore_attrib *packing, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage, |
| GLboolean *retainInternalCopy ); |
| GLboolean (*TexImage2D)( GLcontext *ctx, GLenum target, GLint level, |
| GLenum format, GLenum type, const GLvoid *pixels, |
| const struct gl_pixelstore_attrib *packing, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage, |
| GLboolean *retainInternalCopy ); |
| GLboolean (*TexImage3D)( GLcontext *ctx, GLenum target, GLint level, |
| GLenum format, GLenum type, const GLvoid *pixels, |
| const struct gl_pixelstore_attrib *packing, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage, |
| GLboolean *retainInternalCopy ); |
| /* Called by glTexImage1/2/3D. |
| * Will not be called if any glPixelTransfer operations are enabled. |
| * Arguments: |
| * <target>, <level>, <format>, <type> and <pixels> are user specified. |
| * <packing> indicates the image packing of pixels. |
| * <texObj> is the target texture object. |
| * <texImage> is the target texture image. It will have the texture |
| * width, height, depth, border and internalFormat information. |
| * <retainInternalCopy> is returned by this function and indicates whether |
| * core Mesa should keep an internal copy of the texture image. |
| * Return GL_TRUE if operation completed, return GL_FALSE if core Mesa |
| * should do the job. If GL_FALSE is returned, this function will be |
| * called a second time after the texture image has been unpacked into |
| * GLubytes. It may be easier for the driver to handle then. |
| */ |
| |
| GLboolean (*TexSubImage1D)( GLcontext *ctx, GLenum target, GLint level, |
| GLint xoffset, GLsizei width, |
| GLenum format, GLenum type, |
| const GLvoid *pixels, |
| const struct gl_pixelstore_attrib *packing, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage ); |
| GLboolean (*TexSubImage2D)( GLcontext *ctx, GLenum target, GLint level, |
| GLint xoffset, GLint yoffset, |
| GLsizei width, GLsizei height, |
| GLenum format, GLenum type, |
| const GLvoid *pixels, |
| const struct gl_pixelstore_attrib *packing, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage ); |
| GLboolean (*TexSubImage3D)( GLcontext *ctx, GLenum target, GLint level, |
| GLint xoffset, GLint yoffset, GLint zoffset, |
| GLsizei width, GLsizei height, GLint depth, |
| GLenum format, GLenum type, |
| const GLvoid *pixels, |
| const struct gl_pixelstore_attrib *packing, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage ); |
| /* Called by glTexSubImage1/2/3D. |
| * Will not be called if any glPixelTransfer operations are enabled. |
| * Arguments: |
| * <target>, <level>, <xoffset>, <yoffset>, <zoffset>, <width>, <height>, |
| * <depth>, <format>, <type> and <pixels> are user specified. |
| * <packing> indicates the image packing of pixels. |
| * <texObj> is the target texture object. |
| * <texImage> is the target texture image. It will have the texture |
| * width, height, border and internalFormat information. |
| * Return GL_TRUE if operation completed, return GL_FALSE if core Mesa |
| * should do the job. If GL_FALSE is returned, then TexImage1/2/3D will |
| * be called with the complete texture image. |
| */ |
| |
| GLboolean (*CopyTexImage1D)( GLcontext *ctx, GLenum target, GLint level, |
| GLenum internalFormat, GLint x, GLint y, |
| GLsizei width, GLint border ); |
| GLboolean (*CopyTexImage2D)( GLcontext *ctx, GLenum target, GLint level, |
| GLenum internalFormat, GLint x, GLint y, |
| GLsizei width, GLsizei height, GLint border ); |
| /* Called by glCopyTexImage1D and glCopyTexImage2D. |
| * Will not be called if any glPixelTransfer operations are enabled. |
| * Return GL_TRUE if operation completed, return GL_FALSE if core Mesa |
| * should do the job. |
| */ |
| |
| GLboolean (*CopyTexSubImage1D)( GLcontext *ctx, GLenum target, GLint level, |
| GLint xoffset, |
| GLint x, GLint y, GLsizei width ); |
| GLboolean (*CopyTexSubImage2D)( GLcontext *ctx, GLenum target, GLint level, |
| GLint xoffset, GLint yoffset, |
| GLint x, GLint y, |
| GLsizei width, GLsizei height ); |
| GLboolean (*CopyTexSubImage3D)( GLcontext *ctx, GLenum target, GLint level, |
| GLint xoffset, GLint yoffset, GLint zoffset, |
| GLint x, GLint y, |
| GLsizei width, GLsizei height ); |
| /* Called by glCopyTexSubImage1/2/3D. |
| * Will not be called if any glPixelTransfer operations are enabled. |
| * Return GL_TRUE if operation completed, return GL_FALSE if core Mesa |
| * should do the job. |
| */ |
| |
| GLvoid *(*GetTexImage)( GLcontext *ctx, GLenum target, GLint level, |
| const struct gl_texture_object *texObj, |
| GLenum *formatOut, GLenum *typeOut, |
| GLboolean *freeImageOut ); |
| /* Called by glGetTexImage or by core Mesa when a texture image |
| * is needed for software fallback rendering. |
| * Return the address of the texture image or NULL if failure. |
| * The image must be tightly packed (i.e. row stride = image width) |
| * Return the image's format and type in formatOut and typeOut. |
| * The format and type must be values which are accepted by glTexImage. |
| * Set the freeImageOut flag if the returned image should be deallocated |
| * with FREE() when finished. |
| * The size of the image can be deduced from the target and level. |
| * Core Mesa will perform any image format/type conversions that are needed. |
| */ |
| |
| GLboolean (*TestProxyTexImage)(GLcontext *ctx, GLenum target, |
| GLint level, GLint internalFormat, |
| GLenum format, GLenum type, |
| GLint width, GLint height, |
| GLint depth, GLint border); |
| /* Called by glTexImage[123]D when user specifies a proxy texture |
| * target. Return GL_TRUE if the proxy test passes, return GL_FALSE |
| * if the test fails. |
| */ |
| |
| GLboolean (*CompressedTexImage1D)( GLcontext *ctx, GLenum target, |
| GLint level, GLsizei imageSize, |
| const GLvoid *data, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage, |
| GLboolean *retainInternalCopy); |
| GLboolean (*CompressedTexImage2D)( GLcontext *ctx, GLenum target, |
| GLint level, GLsizei imageSize, |
| const GLvoid *data, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage, |
| GLboolean *retainInternalCopy); |
| GLboolean (*CompressedTexImage3D)( GLcontext *ctx, GLenum target, |
| GLint level, GLsizei imageSize, |
| const GLvoid *data, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage, |
| GLboolean *retainInternalCopy); |
| /* Called by glCompressedTexImage1/2/3D. |
| * Arguments: |
| * <target>, <level>, <internalFormat>, <data> are user specified. |
| * <texObj> is the target texture object. |
| * <texImage> is the target texture image. It will have the texture |
| * width, height, depth, border and internalFormat information. |
| * <retainInternalCopy> is returned by this function and indicates whether |
| * core Mesa should keep an internal copy of the texture image. |
| * Return GL_TRUE if operation completed, return GL_FALSE if core Mesa |
| * should do the job. |
| */ |
| |
| GLboolean (*CompressedTexSubImage1D)( GLcontext *ctx, GLenum target, |
| GLint level, GLint xoffset, |
| GLsizei width, GLenum format, |
| GLsizei imageSize, const GLvoid *data, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage ); |
| GLboolean (*CompressedTexSubImage2D)( GLcontext *ctx, GLenum target, |
| GLint level, GLint xoffset, |
| GLint yoffset, GLsizei width, |
| GLint height, GLenum format, |
| GLsizei imageSize, const GLvoid *data, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage ); |
| GLboolean (*CompressedTexSubImage3D)( GLcontext *ctx, GLenum target, |
| GLint level, GLint xoffset, |
| GLint yoffset, GLint zoffset, |
| GLsizei width, GLint height, |
| GLint depth, GLenum format, |
| GLsizei imageSize, const GLvoid *data, |
| struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage ); |
| /* Called by glCompressedTexSubImage1/2/3D. |
| * Arguments: |
| * <target>, <level>, <x/z/zoffset>, <width>, <height>, <depth>, |
| * <imageSize>, and <data> are user specified. |
| * <texObj> is the target texture object. |
| * <texImage> is the target texture image. It will have the texture |
| * width, height, depth, border and internalFormat information. |
| * Return GL_TRUE if operation completed, return GL_FALSE if core Mesa |
| * should do the job. |
| */ |
| |
| GLint (*BaseCompressedTexFormat)(GLcontext *ctx, |
| GLint internalFormat); |
| /* Called to compute the base format for a specific compressed |
| * format. Return -1 if the internalFormat is not a specific |
| * compressed format that the driver recognizes. Note the |
| * return value differences between this function and |
| * SpecificCompressedTexFormat below. |
| */ |
| |
| GLint (*SpecificCompressedTexFormat)(GLcontext *ctx, |
| GLint internalFormat, |
| GLint numDimensions, |
| GLint *levelp, |
| GLsizei *widthp, |
| GLsizei *heightp, |
| GLsizei *depthp, |
| GLint *borderp, |
| GLenum *formatp, |
| GLenum *typep); |
| /* Called to turn a generic texture format into a specific |
| * texture format. For example, if a driver implements |
| * GL_3DFX_texture_compression_FXT1, this would map |
| * GL_COMPRESSED_RGBA_ARB to GL_COMPRESSED_RGBA_FXT1_3DFX. |
| * |
| * If the driver does not know how to handle the compressed |
| * format, then just return the generic format, and Mesa will |
| * do the right thing with it. |
| */ |
| |
| GLboolean (*IsCompressedFormat)(GLcontext *ctx, GLint internalFormat); |
| /* Called to tell if a format is a compressed format. |
| */ |
| |
| GLsizei (*CompressedImageSize)(GLcontext *ctx, |
| GLenum internalFormat, |
| GLuint numDimensions, |
| GLuint width, |
| GLuint height, |
| GLuint depth); |
| /* Calculate the size of a compressed image, given the image's |
| * format and dimensions. |
| */ |
| |
| void (*GetCompressedTexImage)( GLcontext *ctx, GLenum target, |
| GLint lod, void *image, |
| const struct gl_texture_object *texObj, |
| struct gl_texture_image *texImage ); |
| /* Called by glGetCompressedTexImageARB. |
| * <target>, <lod>, <image> are specified by user. |
| * <texObj> is the source texture object. |
| * <texImage> is the source texture image. |
| */ |
| |
| void (*TexEnv)( GLcontext *ctx, GLenum target, GLenum pname, |
| const GLfloat *param ); |
| /* Called by glTexEnv*(). |
| */ |
| |
| void (*TexParameter)( GLcontext *ctx, GLenum target, |
| struct gl_texture_object *texObj, |
| GLenum pname, const GLfloat *params ); |
| /* Called by glTexParameter*(). |
| * <target> is user specified |
| * <texObj> the texture object to modify |
| * <pname> is one of GL_TEXTURE_MIN_FILTER, GL_TEXTURE_MAG_FILTER, |
| * GL_TEXTURE_WRAP_[STR], or GL_TEXTURE_BORDER_COLOR. |
| * <params> is user specified. |
| */ |
| |
| void (*BindTexture)( GLcontext *ctx, GLenum target, |
| struct gl_texture_object *tObj ); |
| /* Called by glBindTexture(). |
| */ |
| |
| void (*DeleteTexture)( GLcontext *ctx, struct gl_texture_object *tObj ); |
| /* Called when a texture object is about to be deallocated. Driver |
| * should free anything attached to the DriverData pointers. |
| */ |
| |
| GLboolean (*IsTextureResident)( GLcontext *ctx, |
| struct gl_texture_object *t ); |
| /* Called by glAreTextureResident(). |
| */ |
| |
| void (*PrioritizeTexture)( GLcontext *ctx, struct gl_texture_object *t, |
| GLclampf priority ); |
| /* Called by glPrioritizeTextures(). |
| */ |
| |
| void (*ActiveTexture)( GLcontext *ctx, GLuint texUnitNumber ); |
| /* Called by glActiveTextureARB to set current texture unit. |
| */ |
| |
| void (*UpdateTexturePalette)( GLcontext *ctx, |
| struct gl_texture_object *tObj ); |
| /* Called when the texture's color lookup table is changed. |
| * If tObj is NULL then the shared texture palette ctx->Texture.Palette |
| * is to be updated. |
| */ |
| |
| |
| |
| /*** |
| *** Accelerated point, line, polygon, quad and rect functions: |
| ***/ |
| |
| points_func PointsFunc; |
| line_func LineFunc; |
| triangle_func TriangleFunc; |
| quad_func QuadFunc; |
| rect_func RectFunc; |
| |
| |
| /*** |
| *** Transformation/Rendering functions |
| ***/ |
| |
| void (*RenderStart)( GLcontext *ctx ); |
| void (*RenderFinish)( GLcontext *ctx ); |
| /* KW: These replace Begin and End, and have more relaxed semantics. |
| * They are called prior-to and after one or more vb flush, and are |
| * thus decoupled from the gl_begin/gl_end pairs, which are possibly |
| * more frequent. If a begin/end pair covers >1 vertex buffer, these |
| * are called at most once for the pair. (a bit broken at present) |
| */ |
| |
| void (*RasterSetup)( struct vertex_buffer *VB, GLuint start, GLuint end ); |
| /* This function, if not NULL, is called whenever new window coordinates |
| * are put in the vertex buffer. The vertices in question are those n |
| * such that start <= n < end. |
| * The device driver can convert the window coords to its own specialized |
| * format. The 3Dfx driver uses this. |
| * |
| * Note: Deprecated in favour of RegisterPipelineStages, below. |
| */ |
| |
| render_func *RenderVBClippedTab; |
| render_func *RenderVBCulledTab; |
| render_func *RenderVBRawTab; |
| /* These function tables allow the device driver to rasterize an |
| * entire begin/end group of primitives at once. See the |
| * gl_render_vb() function in vbrender.c for more details. |
| */ |
| |
| GLboolean (*MultipassFunc)( struct vertex_buffer *VB, 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. |
| */ |
| |
| /*** |
| *** NEW in Mesa 3.x |
| ***/ |
| void (*LightingSpaceChange)( GLcontext *ctx ); |
| /* Notify driver that the special derived value _NeedEyeCoords has |
| * changed. |
| */ |
| |
| |
| void (*RegisterVB)( struct vertex_buffer *VB ); |
| void (*UnregisterVB)( struct vertex_buffer *VB ); |
| /* When Mesa creates a new vertex buffer it calls Driver.RegisterVB() |
| * so the device driver can allocate its own vertex buffer data and |
| * hook it to the VB->driver_data pointer. |
| * When Mesa destroys a vertex buffer it calls Driver.UnegisterVB() |
| * so the driver can deallocate its own data attached to VB->driver_data. |
| */ |
| |
| |
| void (*ResetVB)( struct vertex_buffer *VB ); |
| void (*ResetCvaVB)( struct vertex_buffer *VB, GLuint stages ); |
| /* Do any reset operations necessary to the driver data associated |
| * with these vertex buffers. |
| */ |
| |
| GLuint RenderVectorFlags; |
| /* What do the render tables require of the vectors they deal |
| * with? |
| */ |
| |
| GLuint (*RegisterPipelineStages)( struct gl_pipeline_stage *out, |
| const struct gl_pipeline_stage *in, |
| GLuint nr ); |
| /* Register new pipeline stages, or modify existing ones. See also |
| * the OptimizePipeline() functions. |
| */ |
| |
| |
| GLboolean (*BuildPrecalcPipeline)( GLcontext *ctx ); |
| GLboolean (*BuildEltPipeline)( GLcontext *ctx ); |
| /* Perform the full pipeline build, or return false. |
| */ |
| |
| |
| void (*OptimizePrecalcPipeline)( GLcontext *ctx, struct gl_pipeline *pipe ); |
| void (*OptimizeImmediatePipeline)( GLcontext *ctx, struct gl_pipeline *pipe); |
| /* Check to see if a fast path exists for this combination of stages |
| * in the precalc and immediate (elt) pipelines. |
| */ |
| |
| |
| /* |
| * State-changing functions (drawing functions are above) |
| * |
| * These functions are called by their corresponding OpenGL API functions. |
| * They're ALSO called by the gl_PopAttrib() function!!! |
| * May add more functions like these to the device driver in the future. |
| * This should reduce the amount of state checking that |
| * the driver's UpdateState() function must do. |
| */ |
| void (*AlphaFunc)(GLcontext *ctx, GLenum func, GLclampf ref); |
| void (*BlendEquation)(GLcontext *ctx, GLenum mode); |
| void (*BlendFunc)(GLcontext *ctx, GLenum sfactor, GLenum dfactor); |
| void (*BlendFuncSeparate)( GLcontext *ctx, GLenum sfactorRGB, |
| GLenum dfactorRGB, GLenum sfactorA, |
| GLenum dfactorA ); |
| void (*ClearDepth)(GLcontext *ctx, GLclampd d); |
| void (*ColorMask)(GLcontext *ctx, GLboolean rmask, GLboolean gmask, |
| GLboolean bmask, GLboolean amask ); |
| void (*CullFace)(GLcontext *ctx, GLenum mode); |
| void (*FrontFace)(GLcontext *ctx, GLenum mode); |
| void (*DepthFunc)(GLcontext *ctx, GLenum func); |
| void (*DepthMask)(GLcontext *ctx, GLboolean flag); |
| void (*DepthRange)(GLcontext *ctx, GLclampd nearval, GLclampd farval); |
| void (*Enable)(GLcontext* ctx, GLenum cap, GLboolean state); |
| void (*Fogfv)(GLcontext *ctx, GLenum pname, const GLfloat *params); |
| void (*Hint)(GLcontext *ctx, GLenum target, GLenum mode); |
| void (*IndexMask)(GLcontext *ctx, GLuint mask); |
| void (*Lightfv)(GLcontext *ctx, GLenum light, |
| GLenum pname, const GLfloat *params ); |
| void (*LightModelfv)(GLcontext *ctx, GLenum pname, const GLfloat *params); |
| void (*LineStipple)(GLcontext *ctx, GLint factor, GLushort pattern ); |
| void (*LineWidth)(GLcontext *ctx, GLfloat width); |
| void (*LogicOpcode)(GLcontext *ctx, GLenum opcode); |
| void (*PolygonMode)(GLcontext *ctx, GLenum face, GLenum mode); |
| void (*PolygonStipple)(GLcontext *ctx, const GLubyte *mask ); |
| void (*Scissor)(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h); |
| void (*ShadeModel)(GLcontext *ctx, GLenum mode); |
| void (*ClearStencil)(GLcontext *ctx, GLint s); |
| void (*StencilFunc)(GLcontext *ctx, GLenum func, GLint ref, GLuint mask); |
| void (*StencilMask)(GLcontext *ctx, GLuint mask); |
| void (*StencilOp)(GLcontext *ctx, GLenum fail, GLenum zfail, GLenum zpass); |
| 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); |
| }; |
| |
| |
| |
| #endif |
| |