/* $Id: osmesa.c,v 1.45 2001/02/08 23:52:29 brianp Exp $ */ /* * Mesa 3-D graphics library * Version: 3.5 * * Copyright (C) 1999-2001 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. */ /* * Off-Screen Mesa rendering / Rendering into client memory space * * Note on thread safety: this driver is thread safe. All * functions are reentrant. The notion of current context is * managed by the core _mesa_make_current() and _mesa_get_current_context() * functions. Those functions are thread-safe. */ #include "glheader.h" #include "GL/osmesa.h" #include "context.h" #include "colormac.h" #include "depth.h" #include "extensions.h" #include "macros.h" #include "matrix.h" #include "mem.h" #include "mmath.h" #include "mtypes.h" #include "texstore.h" #include "array_cache/acache.h" #include "swrast/swrast.h" #include "swrast_setup/swrast_setup.h" #include "swrast/s_context.h" #include "swrast/s_depth.h" #include "swrast/s_lines.h" #include "swrast/s_triangle.h" #include "tnl/tnl.h" /* * This is the OS/Mesa context struct. * Notice how it includes a GLcontext. By doing this we're mimicking * C++ inheritance/derivation. * Later, we can cast a GLcontext pointer into an OSMesaContext pointer * or vice versa. */ struct osmesa_context { GLcontext gl_ctx; /* The core GL/Mesa context */ GLvisual *gl_visual; /* Describes the buffers */ GLframebuffer *gl_buffer; /* Depth, stencil, accum, etc buffers */ GLenum format; /* either GL_RGBA or GL_COLOR_INDEX */ void *buffer; /* the image buffer */ GLint width, height; /* size of image buffer */ GLint rowlength; /* number of pixels per row */ GLint userRowLength; /* user-specified number of pixels per row */ GLint rshift, gshift; /* bit shifts for RGBA formats */ GLint bshift, ashift; GLint rInd, gInd, bInd, aInd;/* index offsets for RGBA formats */ GLchan *rowaddr[MAX_HEIGHT]; /* address of first pixel in each image row */ GLboolean yup; /* TRUE -> Y increases upward */ /* FALSE -> Y increases downward */ }; /* A forward declaration: */ static void osmesa_update_state( GLcontext *ctx, GLuint newstate ); static void osmesa_register_swrast_functions( GLcontext *ctx ); #define OSMESA_CONTEXT(ctx) ((OSMesaContext) (ctx->DriverCtx)) /**********************************************************************/ /***** Public Functions *****/ /**********************************************************************/ /* * Create an Off-Screen Mesa rendering context. The only attribute needed is * an RGBA vs Color-Index mode flag. * * Input: format - either GL_RGBA or GL_COLOR_INDEX * sharelist - specifies another OSMesaContext with which to share * display lists. NULL indicates no sharing. * Return: an OSMesaContext or 0 if error */ OSMesaContext GLAPIENTRY OSMesaCreateContext( GLenum format, OSMesaContext sharelist ) { return OSMesaCreateContextExt(format, DEFAULT_SOFTWARE_DEPTH_BITS, 8, 16, sharelist); } /* * New in Mesa 3.5 * * Create context and specify size of ancillary buffers. */ OSMesaContext GLAPIENTRY OSMesaCreateContextExt( GLenum format, GLint depthBits, GLint stencilBits, GLint accumBits, OSMesaContext sharelist ) { OSMesaContext osmesa; GLint rshift, gshift, bshift, ashift; GLint rind, gind, bind, aind; GLint indexBits, redBits, greenBits, blueBits, alphaBits; GLboolean rgbmode; GLboolean swalpha; const GLuint i4 = 1; const GLubyte *i1 = (GLubyte *) &i4; const GLint little_endian = *i1; swalpha = GL_FALSE; rind = gind = bind = aind = 0; if (format==OSMESA_COLOR_INDEX) { indexBits = 8; rshift = gshift = bshift = ashift = 0; rgbmode = GL_FALSE; } else if (format==OSMESA_RGBA) { indexBits = 0; redBits = 8; greenBits = 8; blueBits = 8; alphaBits = 8; rind = 0; gind = 1; bind = 2; aind = 3; if (little_endian) { rshift = 0; gshift = 8; bshift = 16; ashift = 24; } else { rshift = 24; gshift = 16; bshift = 8; ashift = 0; } rgbmode = GL_TRUE; } else if (format==OSMESA_BGRA) { indexBits = 0; redBits = 8; greenBits = 8; blueBits = 8; alphaBits = 8; rind = 2; gind = 1; bind = 0; aind = 3; if (little_endian) { ashift = 0; rshift = 8; gshift = 16; bshift = 24; } else { bshift = 24; gshift = 16; rshift = 8; ashift = 0; } rgbmode = GL_TRUE; } else if (format==OSMESA_ARGB) { indexBits = 0; redBits = 8; greenBits = 8; blueBits = 8; alphaBits = 8; rind = 1; gind = 2; bind = 3; aind = 0; if (little_endian) { bshift = 0; gshift = 8; rshift = 16; ashift = 24; } else { ashift = 24; rshift = 16; gshift = 8; bshift = 0; } rgbmode = GL_TRUE; } else if (format==OSMESA_RGB) { indexBits = 0; redBits = 8; greenBits = 8; blueBits = 8; alphaBits = 0; bshift = 0; gshift = 8; rshift = 16; ashift = 24; rind = 0; gind = 1; bind = 2; rgbmode = GL_TRUE; swalpha = GL_TRUE; } else if (format==OSMESA_BGR) { indexBits = 0; redBits = 8; greenBits = 8; blueBits = 8; alphaBits = 0; bshift = 0; gshift = 8; rshift = 16; ashift = 24; rind = 2; gind = 1; bind = 0; rgbmode = GL_TRUE; swalpha = GL_TRUE; } else { return NULL; } osmesa = (OSMesaContext) CALLOC_STRUCT(osmesa_context); if (osmesa) { osmesa->gl_visual = _mesa_create_visual( rgbmode, GL_FALSE, /* double buffer */ GL_FALSE, /* stereo */ redBits, greenBits, blueBits, alphaBits, indexBits, depthBits, stencilBits, accumBits, accumBits, accumBits, alphaBits ? accumBits : 0, 1 /* num samples */ ); if (!osmesa->gl_visual) { FREE(osmesa); return NULL; } if (!_mesa_initialize_context(&osmesa->gl_ctx, osmesa->gl_visual, sharelist ? &sharelist->gl_ctx : (GLcontext *) NULL, (void *) osmesa, GL_TRUE )) { _mesa_destroy_visual( osmesa->gl_visual ); FREE(osmesa); return NULL; } _mesa_enable_sw_extensions(&(osmesa->gl_ctx)); osmesa->gl_buffer = _mesa_create_framebuffer( osmesa->gl_visual, osmesa->gl_visual->depthBits > 0, osmesa->gl_visual->stencilBits > 0, osmesa->gl_visual->accumRedBits > 0, osmesa->gl_visual->alphaBits > 0 ); if (!osmesa->gl_buffer) { _mesa_destroy_visual( osmesa->gl_visual ); _mesa_free_context_data( &osmesa->gl_ctx ); FREE(osmesa); return NULL; } osmesa->format = format; osmesa->buffer = NULL; osmesa->width = 0; osmesa->height = 0; osmesa->userRowLength = 0; osmesa->rowlength = 0; osmesa->yup = GL_TRUE; osmesa->rshift = rshift; osmesa->gshift = gshift; osmesa->bshift = bshift; osmesa->ashift = ashift; osmesa->rInd = rind; osmesa->gInd = gind; osmesa->bInd = bind; osmesa->aInd = aind; /* Initialize the software rasterizer and helper modules. */ { GLcontext *ctx = &osmesa->gl_ctx; _swrast_CreateContext( ctx ); _ac_CreateContext( ctx ); _tnl_CreateContext( ctx ); _swsetup_CreateContext( ctx ); osmesa_register_swrast_functions( ctx ); } } return osmesa; } /* * Destroy an Off-Screen Mesa rendering context. * * Input: ctx - the context to destroy */ void GLAPIENTRY OSMesaDestroyContext( OSMesaContext ctx ) { if (ctx) { _mesa_destroy_visual( ctx->gl_visual ); _mesa_destroy_framebuffer( ctx->gl_buffer ); _mesa_free_context_data( &ctx->gl_ctx ); FREE( ctx ); } } /* * Recompute the values of the context's rowaddr array. */ static void compute_row_addresses( OSMesaContext ctx ) { GLint bytesPerPixel, bytesPerRow, i; GLubyte *origin = (GLubyte *) ctx->buffer; if (ctx->format == OSMESA_COLOR_INDEX) { /* CI mode */ bytesPerPixel = 1 * sizeof(GLchan); } else if ((ctx->format == OSMESA_RGB) || (ctx->format == OSMESA_BGR)) { /* RGB mode */ bytesPerPixel = 3 * sizeof(GLchan); } else { /* RGBA mode */ bytesPerPixel = 4 * sizeof(GLchan); } bytesPerRow = ctx->rowlength * bytesPerPixel; if (ctx->yup) { /* Y=0 is bottom line of window */ for (i = 0; i < MAX_HEIGHT; i++) { ctx->rowaddr[i] = (GLchan *) ((GLubyte *) origin + i * bytesPerRow); } } else { /* Y=0 is top line of window */ for (i = 0; i < MAX_HEIGHT; i++) { GLint j = ctx->height - i - 1; ctx->rowaddr[i] = (GLchan *) ((GLubyte *) origin + j * bytesPerRow); } } } /* * Bind an OSMesaContext to an image buffer. The image buffer is just a * block of memory which the client provides. Its size must be at least * as large as width*height*sizeof(type). Its address should be a multiple * of 4 if using RGBA mode. * * Image data is stored in the order of glDrawPixels: row-major order * with the lower-left image pixel stored in the first array position * (ie. bottom-to-top). * * Since the only type initially supported is GL_UNSIGNED_BYTE, if the * context is in RGBA mode, each pixel will be stored as a 4-byte RGBA * value. If the context is in color indexed mode, each pixel will be * stored as a 1-byte value. * * If the context's viewport hasn't been initialized yet, it will now be * initialized to (0,0,width,height). * * Input: ctx - the rendering context * buffer - the image buffer memory * type - data type for pixel components, only GL_UNSIGNED_BYTE * supported now * width, height - size of image buffer in pixels, at least 1 * Return: GL_TRUE if success, GL_FALSE if error because of invalid ctx, * invalid buffer address, type!=GL_UNSIGNED_BYTE, width<1, height<1, * width>internal limit or height>internal limit. */ GLboolean GLAPIENTRY OSMesaMakeCurrent( OSMesaContext ctx, void *buffer, GLenum type, GLsizei width, GLsizei height ) { if (!ctx || !buffer || type != CHAN_TYPE || width < 1 || height < 1 || width > MAX_WIDTH || height > MAX_HEIGHT) { return GL_FALSE; } osmesa_update_state( &ctx->gl_ctx, 0 ); _mesa_make_current( &ctx->gl_ctx, ctx->gl_buffer ); ctx->buffer = buffer; ctx->width = width; ctx->height = height; if (ctx->userRowLength) ctx->rowlength = ctx->userRowLength; else ctx->rowlength = width; compute_row_addresses( ctx ); /* init viewport */ if (ctx->gl_ctx.Viewport.Width==0) { /* initialize viewport and scissor box to buffer size */ _mesa_Viewport( 0, 0, width, height ); ctx->gl_ctx.Scissor.Width = width; ctx->gl_ctx.Scissor.Height = height; } return GL_TRUE; } OSMesaContext GLAPIENTRY OSMesaGetCurrentContext( void ) { GLcontext *ctx = _mesa_get_current_context(); if (ctx) return (OSMesaContext) ctx; else return NULL; } void GLAPIENTRY OSMesaPixelStore( GLint pname, GLint value ) { OSMesaContext ctx = OSMesaGetCurrentContext(); switch (pname) { case OSMESA_ROW_LENGTH: if (value<0) { gl_error( &ctx->gl_ctx, GL_INVALID_VALUE, "OSMesaPixelStore(value)" ); return; } ctx->userRowLength = value; ctx->rowlength = value; break; case OSMESA_Y_UP: ctx->yup = value ? GL_TRUE : GL_FALSE; break; default: gl_error( &ctx->gl_ctx, GL_INVALID_ENUM, "OSMesaPixelStore(pname)" ); return; } compute_row_addresses( ctx ); } void GLAPIENTRY OSMesaGetIntegerv( GLint pname, GLint *value ) { OSMesaContext ctx = OSMesaGetCurrentContext(); switch (pname) { case OSMESA_WIDTH: *value = ctx->width; return; case OSMESA_HEIGHT: *value = ctx->height; return; case OSMESA_FORMAT: *value = ctx->format; return; case OSMESA_TYPE: *value = GL_UNSIGNED_BYTE; return; case OSMESA_ROW_LENGTH: *value = ctx->rowlength; return; case OSMESA_Y_UP: *value = ctx->yup; return; default: gl_error(&ctx->gl_ctx, GL_INVALID_ENUM, "OSMesaGetIntergerv(pname)"); return; } } /* * Return the depth buffer associated with an OSMesa context. * Input: c - the OSMesa context * Output: width, height - size of buffer in pixels * bytesPerValue - bytes per depth value (2 or 4) * buffer - pointer to depth buffer values * Return: GL_TRUE or GL_FALSE to indicate success or failure. */ GLboolean GLAPIENTRY OSMesaGetDepthBuffer( OSMesaContext c, GLint *width, GLint *height, GLint *bytesPerValue, void **buffer ) { if ((!c->gl_buffer) || (!c->gl_buffer->DepthBuffer)) { *width = 0; *height = 0; *bytesPerValue = 0; *buffer = 0; return GL_FALSE; } else { *width = c->gl_buffer->Width; *height = c->gl_buffer->Height; if (c->gl_visual->depthBits <= 16) *bytesPerValue = sizeof(GLushort); else *bytesPerValue = sizeof(GLuint); *buffer = c->gl_buffer->DepthBuffer; return GL_TRUE; } } /* * Return the color buffer associated with an OSMesa context. * Input: c - the OSMesa context * Output: width, height - size of buffer in pixels * format - the pixel format (OSMESA_FORMAT) * buffer - pointer to color buffer values * Return: GL_TRUE or GL_FALSE to indicate success or failure. */ GLboolean GLAPIENTRY OSMesaGetColorBuffer( OSMesaContext c, GLint *width, GLint *height, GLint *format, void **buffer ) { if (!c->buffer) { *width = 0; *height = 0; *format = 0; *buffer = 0; return GL_FALSE; } else { *width = c->width; *height = c->height; *format = c->format; *buffer = c->buffer; return GL_TRUE; } } /**********************************************************************/ /*** Device Driver Functions ***/ /**********************************************************************/ /* * Useful macros: */ #define PACK_RGBA(DST, R, G, B, A) \ do { \ (DST)[osmesa->rInd] = R; \ (DST)[osmesa->gInd] = G; \ (DST)[osmesa->bInd] = B; \ (DST)[osmesa->aInd] = A; \ } while (0) #define PACK_RGB(DST, R, G, B) \ do { \ (DST)[0] = R; \ (DST)[1] = G; \ (DST)[2] = B; \ } while (0) #define PACK_BGR(DST, R, G, B) \ do { \ (DST)[0] = B; \ (DST)[1] = G; \ (DST)[2] = R; \ } while (0) #define UNPACK_RED(P) ( ((GLchan *) &(P))[osmesa->rInd] ) #define UNPACK_GREEN(P) ( ((GLchan *) &(P))[osmesa->gInd] ) #define UNPACK_BLUE(P) ( ((GLchan *) &(P))[osmesa->bInd] ) #define UNPACK_ALPHA(P) ( ((GLchan *) &(P))[osmesa->aInd] ) #define PIXELADDR1(X,Y) (osmesa->rowaddr[Y] + (X)) #define PIXELADDR3(X,Y) (osmesa->rowaddr[Y] + 3 * (X)) #define PIXELADDR4(X,Y) (osmesa->rowaddr[Y] + 4 * (X)) static GLboolean set_draw_buffer( GLcontext *ctx, GLenum mode ) { (void) ctx; if (mode==GL_FRONT_LEFT) { return GL_TRUE; } else { return GL_FALSE; } } static void set_read_buffer( GLcontext *ctx, GLframebuffer *buffer, GLenum mode ) { /* separate read buffer not supported */ ASSERT(buffer == ctx->DrawBuffer); ASSERT(mode == GL_FRONT_LEFT); } static void clear( GLcontext *ctx, GLbitfield mask, GLboolean all, GLint x, GLint y, GLint width, GLint height ) { OSMesaContext osmesa = OSMESA_CONTEXT(ctx); const GLuint *colorMask = (GLuint *) &ctx->Color.ColorMask; /* sanity check - we only have a front-left buffer */ ASSERT((mask & (DD_FRONT_RIGHT_BIT | DD_BACK_LEFT_BIT | DD_BACK_RIGHT_BIT)) == 0); if (*colorMask == 0xffffffff && ctx->Color.IndexMask == 0xffffffff) { if (mask & DD_FRONT_LEFT_BIT) { if (osmesa->format == OSMESA_COLOR_INDEX) { if (all) { /* Clear whole CI buffer */ #if CHAN_TYPE == GL_UNSIGNED_BYTE MEMSET(osmesa->buffer, ctx->Color.ClearIndex, osmesa->rowlength * osmesa->height); #else const GLint n = osmesa->rowlength * osmesa->height; GLchan *buffer = (GLchan *) osmesa->buffer; GLint i; for (i = 0; i < n; i ++) { buffer[i] = ctx->Color.ClearIndex; } #endif } else { /* Clear part of CI buffer */ const GLchan clearIndex = (GLchan) ctx->Color.ClearIndex; GLint i, j; for (i = 0; i < height; i++) { GLchan *ptr1 = PIXELADDR1(x, (y + i)); for (j = 0; j < width; j++) { *ptr1++ = clearIndex; } } } } else if (osmesa->format == OSMESA_RGB) { const GLchan r = ctx->Color.ClearColor[0]; const GLchan g = ctx->Color.ClearColor[1]; const GLchan b = ctx->Color.ClearColor[2]; if (all) { /* Clear whole RGB buffer */ GLuint n = osmesa->rowlength * osmesa->height; GLchan *ptr3 = (GLchan *) osmesa->buffer; GLuint i; for (i = 0; i < n; i++) { PACK_RGB(ptr3, r, g, b); ptr3 += 3; } } else { /* Clear part of RGB buffer */ GLint i, j; for (i = 0; i < height; i++) { GLchan *ptr3 = PIXELADDR3(x, (y + i)); for (j = 0; j < width; j++) { PACK_RGB(ptr3, r, g, b); ptr3 += 3; } } } } else if (osmesa->format == OSMESA_BGR) { const GLchan r = ctx->Color.ClearColor[0]; const GLchan g = ctx->Color.ClearColor[1]; const GLchan b = ctx->Color.ClearColor[2]; if (all) { /* Clear whole RGB buffer */ const GLint n = osmesa->rowlength * osmesa->height; GLchan *ptr3 = (GLchan *) osmesa->buffer; GLint i; for (i = 0; i < n; i++) { PACK_BGR(ptr3, r, g, b); ptr3 += 3; } } else { /* Clear part of RGB buffer */ GLint i, j; for (i = 0; i < height; i++) { GLchan *ptr3 = PIXELADDR3(x, (y + i)); for (j = 0; j < width; j++) { PACK_BGR(ptr3, r, g, b); ptr3 += 3; } } } } else { #if CHAN_TYPE == GL_UNSIGNED_BYTE /* 4-byte pixel value */ GLuint clearPixel; GLchan *clr = (GLchan *) &clearPixel; clr[osmesa->rInd] = ctx->Color.ClearColor[0]; clr[osmesa->gInd] = ctx->Color.ClearColor[1]; clr[osmesa->bInd] = ctx->Color.ClearColor[2]; clr[osmesa->aInd] = ctx->Color.ClearColor[3]; if (all) { /* Clear whole RGBA buffer */ const GLuint n = osmesa->rowlength * osmesa->height; GLuint *ptr4 = (GLuint *) osmesa->buffer; GLuint i; if (clearPixel) { for (i = 0; i < n; i++) { *ptr4++ = clearPixel; } } else { BZERO(ptr4, n * sizeof(GLuint)); } } else { /* Clear part of RGBA buffer */ GLint i, j; for (i = 0; i < height; i++) { GLuint *ptr4 = (GLuint *) PIXELADDR4(x, (y + i)); for (j = 0; j < width; j++) { *ptr4++ = clearPixel; } } } #else const GLchan r = ctx->Color.ClearColor[0]; const GLchan g = ctx->Color.ClearColor[1]; const GLchan b = ctx->Color.ClearColor[2]; const GLchan a = ctx->Color.ClearColor[3]; if (all) { /* Clear whole RGBA buffer */ const GLuint n = osmesa->rowlength * osmesa->height; GLchan *p = (GLchan *) osmesa->buffer; GLuint i; for (i = 0; i < n; i++) { PACK_RGBA(p, r, g, b, a); p += 4; } } else { /* Clear part of RGBA buffer */ GLint i, j; for (i = 0; i < height; i++) { GLchan *p = PIXELADDR4(x, (y + i)); for (j = 0; j < width; j++) { PACK_RGBA(p, r, g, b, a); p += 4; } } } #endif } mask &= ~DD_FRONT_LEFT_BIT; } } if (mask) _swrast_Clear( ctx, mask, all, x, y, width, height ); } static void buffer_size( GLcontext *ctx, GLuint *width, GLuint *height ) { OSMesaContext osmesa = OSMESA_CONTEXT(ctx); *width = osmesa->width; *height = osmesa->height; } /**********************************************************************/ /***** Read/write spans/arrays of RGBA pixels *****/ /**********************************************************************/ /* Write RGBA pixels to an RGBA (or permuted) buffer. */ static void write_rgba_span( const GLcontext *ctx, GLuint n, GLint x, GLint y, CONST GLchan rgba[][4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *p = PIXELADDR4(x, y); GLuint i; if (mask) { for (i = 0; i < n; i++, p += 4) { if (mask[i]) { PACK_RGBA(p, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP], rgba[i][ACOMP]); } } } else { for (i = 0; i < n; i++, p += 4) { PACK_RGBA(p, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP], rgba[i][ACOMP]); } } } /* Write RGBA pixels to an RGBA buffer. This is the fastest span-writer. */ static void write_rgba_span_rgba( const GLcontext *ctx, GLuint n, GLint x, GLint y, CONST GLchan rgba[][4], const GLubyte mask[] ) { OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint *ptr4 = (GLuint *) PIXELADDR4(x, y); const GLuint *rgba4 = (const GLuint *) rgba; GLuint i; ASSERT(CHAN_TYPE == GL_UNSIGNED_BYTE); if (mask) { for (i = 0; i < n; i++) { if (mask[i]) { ptr4[i] = rgba4[i]; } } } else { MEMCPY( ptr4, rgba4, n * 4 ); } } /* Write RGB pixels to an RGBA (or permuted) buffer. */ static void write_rgb_span( const GLcontext *ctx, GLuint n, GLint x, GLint y, CONST GLchan rgb[][3], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *p = PIXELADDR4(x, y); GLuint i; if (mask) { for (i = 0; i < n; i++, p+=4) { if (mask[i]) { PACK_RGBA(p, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP], 255); } } } else { for (i = 0; i < n; i++, p+=4) { PACK_RGBA(p, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP], 255); } } } static void write_monocolor_span( const GLcontext *ctx, GLuint n, GLint x, GLint y, const GLchan color[4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *p = PIXELADDR4(x, y); GLuint i; for (i = 0; i < n; i++, p += 4) { if (mask[i]) { PACK_RGBA(p, color[RCOMP], color[GCOMP], color[BCOMP], color[ACOMP]); } } } static void write_rgba_pixels( const GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], CONST GLchan rgba[][4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint i; for (i = 0; i < n; i++) { if (mask[i]) { GLchan *p = PIXELADDR4(x[i], y[i]); PACK_RGBA(p, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP], rgba[i][ACOMP]); } } } static void write_monocolor_pixels( const GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], const GLchan color[4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint i; for (i = 0; i < n; i++) { if (mask[i]) { GLchan *p = PIXELADDR4(x[i], y[i]); PACK_RGBA(p, color[RCOMP], color[GCOMP], color[BCOMP], color[ACOMP]); } } } static void read_rgba_span( const GLcontext *ctx, GLuint n, GLint x, GLint y, GLchan rgba[][4] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint i; GLchan *p = PIXELADDR4(x, y); for (i = 0; i < n; i++, p += 4) { rgba[i][RCOMP] = UNPACK_RED(p); rgba[i][GCOMP] = UNPACK_GREEN(p); rgba[i][BCOMP] = UNPACK_BLUE(p); rgba[i][ACOMP] = UNPACK_ALPHA(p); } } /* Read RGBA pixels from an RGBA buffer */ static void read_rgba_span_rgba( const GLcontext *ctx, GLuint n, GLint x, GLint y, GLchan rgba[][4] ) { OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint *ptr4 = (GLuint *) PIXELADDR4(x, y); MEMCPY( rgba, ptr4, n * 4 * sizeof(GLchan) ); } static void read_rgba_pixels( const GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], GLchan rgba[][4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint i; for (i = 0; i < n; i++) { if (mask[i]) { const GLchan *p = PIXELADDR4(x[i], y[i]); rgba[i][RCOMP] = UNPACK_RED(p); rgba[i][GCOMP] = UNPACK_GREEN(p); rgba[i][BCOMP] = UNPACK_BLUE(p); rgba[i][ACOMP] = UNPACK_ALPHA(p); } } } /**********************************************************************/ /***** 3 byte RGB pixel support funcs *****/ /**********************************************************************/ /* Write RGBA pixels to an RGB buffer. */ static void write_rgba_span_RGB( const GLcontext *ctx, GLuint n, GLint x, GLint y, CONST GLchan rgba[][4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *p = PIXELADDR3(x, y); GLuint i; if (mask) { for (i = 0; i < n; i++, p += 3) { if (mask[i]) { PACK_RGB(p, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); } } } else { for (i = 0; i < n; i++, p += 3) { PACK_RGB(p, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); } } } /* Write RGBA pixels to an BGR buffer. */ static void write_rgba_span_BGR( const GLcontext *ctx, GLuint n, GLint x, GLint y, CONST GLchan rgba[][4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *p = PIXELADDR3(x, y); GLuint i; if (mask) { for (i = 0; i < n; i++, p += 3) { if (mask[i]) { PACK_BGR(p, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); } } } else { for (i = 0; i < n; i++, p += 3) { PACK_BGR(p, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); } } } /* Write RGB pixels to an RGB buffer. */ static void write_rgb_span_RGB( const GLcontext *ctx, GLuint n, GLint x, GLint y, CONST GLchan rgb[][3], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *p = PIXELADDR3(x, y); GLuint i; if (mask) { for (i = 0; i < n; i++, p += 3) { if (mask[i]) { PACK_RGB(p, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]); } } } else { for (i = 0; i < n; i++, p += 3) { PACK_RGB(p, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]); } } } /* Write RGB pixels to an BGR buffer. */ static void write_rgb_span_BGR( const GLcontext *ctx, GLuint n, GLint x, GLint y, CONST GLchan rgb[][3], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *p = PIXELADDR3(x, y); GLuint i; if (mask) { for (i = 0; i < n; i++, p += 3) { if (mask[i]) { PACK_BGR(p, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]); } } } else { for (i = 0; i < n; i++, p += 3) { PACK_BGR(p, rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP]); } } } static void write_monocolor_span_RGB( const GLcontext *ctx, GLuint n, GLint x, GLint y, const GLchan color[4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *p = PIXELADDR3(x, y); GLuint i; for (i = 0; i < n; i++, p += 3) { if (mask[i]) { PACK_RGB(p, color[RCOMP], color[GCOMP], color[BCOMP]); } } } static void write_monocolor_span_BGR( const GLcontext *ctx, GLuint n, GLint x, GLint y, const GLchan color[4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *p = PIXELADDR3(x, y); GLuint i; for (i = 0; i < n; i++, p += 3) { if (mask[i]) { PACK_BGR(p, color[RCOMP], color[GCOMP], color[BCOMP]); } } } static void write_rgba_pixels_RGB( const GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], CONST GLchan rgba[][4], const GLubyte mask[] ) { const OSMesaContext osmesa = (const OSMesaContext) ctx; GLuint i; for (i = 0; i < n; i++) { if (mask[i]) { GLchan *p = PIXELADDR3(x[i], y[i]); PACK_RGB(p, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); } } } static void write_rgba_pixels_BGR( const GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], CONST GLchan rgba[][4], const GLubyte mask[] ) { const OSMesaContext osmesa = (const OSMesaContext) ctx; GLuint i; for (i = 0; i < n; i++) { if (mask[i]) { GLchan *p = PIXELADDR3(x[i], y[i]); PACK_BGR(p, rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]); } } } static void write_monocolor_pixels_RGB( const GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], const GLchan color[4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint i; for (i = 0; i < n; i++) { if (mask[i]) { GLchan *p = PIXELADDR3(x[i], y[i]); PACK_RGB(p, color[RCOMP], color[GCOMP], color[BCOMP]); } } } static void write_monocolor_pixels_BGR( const GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], const GLchan color[4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint i; for (i = 0; i < n; i++) { if (mask[i]) { GLchan *p = PIXELADDR3(x[i], y[i]); PACK_BGR(p, color[RCOMP], color[GCOMP], color[BCOMP]); } } } static void read_rgba_span3( const GLcontext *ctx, GLuint n, GLint x, GLint y, GLchan rgba[][4] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint i; const GLchan *p = PIXELADDR3(x, y); for (i = 0; i < n; i++, p += 3) { rgba[i][RCOMP] = UNPACK_RED(p); rgba[i][GCOMP] = UNPACK_GREEN(p); rgba[i][BCOMP] = UNPACK_BLUE(p); rgba[i][ACOMP] = 255; } } static void read_rgba_pixels3( const GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], GLchan rgba[][4], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLuint i; for (i = 0; i < n; i++) { if (mask[i]) { const GLchan *p = PIXELADDR3(x[i], y[i]); rgba[i][RCOMP] = UNPACK_RED(p); rgba[i][GCOMP] = UNPACK_GREEN(p); rgba[i][BCOMP] = UNPACK_BLUE(p); rgba[i][ACOMP] = 255; } } } /**********************************************************************/ /***** Read/write spans/arrays of CI pixels *****/ /**********************************************************************/ /* Write 32-bit color index to buffer */ static void write_index32_span( const GLcontext *ctx, GLuint n, GLint x, GLint y, const GLuint index[], const GLubyte mask[] ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); GLchan *ptr1 = PIXELADDR1(x, y); GLuint i; if (mask) { for (i=0;icolor; #define INTERP_XY 1 #define CLIP_HACK 1 #define PLOT(X, Y) \ do { \ GLchan *p = PIXELADDR4(X, Y); \ PACK_RGBA(p, color[0], color[1], color[2], color[3]); \ } while (0) #ifdef WIN32 #include "..\swrast\s_linetemp.h" #else #include "swrast/s_linetemp.h" #endif } /* * Draw a flat-shaded, Z-less, RGB line into an osmesa buffer. */ static void flat_rgba_z_line(GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); const GLchan *color = vert0->color; #define INTERP_XY 1 #define INTERP_Z 1 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE #define CLIP_HACK 1 #define PLOT(X, Y) \ do { \ if (Z < *zPtr) { \ GLchan *p = PIXELADDR4(X, Y); \ PACK_RGBA(p, color[RCOMP], color[GCOMP], \ color[BCOMP], color[ACOMP]); \ *zPtr = Z; \ } \ } while (0) #ifdef WIN32 #include "..\swrast\s_linetemp.h" #else #include "swrast/s_linetemp.h" #endif } /* * Draw a flat-shaded, alpha-blended, RGB line into an osmesa buffer. * XXX update for GLchan */ static void flat_blend_rgba_line( GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1 ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); const GLint rshift = osmesa->rshift; const GLint gshift = osmesa->gshift; const GLint bshift = osmesa->bshift; const GLint avalue = vert0->color[3]; const GLint msavalue = 255 - avalue; const GLint rvalue = vert0->color[0]*avalue; const GLint gvalue = vert0->color[1]*avalue; const GLint bvalue = vert0->color[2]*avalue; #define INTERP_XY 1 #define CLIP_HACK 1 #define PLOT(X,Y) \ { GLuint *ptr4 = (GLuint *) PIXELADDR4(X, Y); \ GLuint pixel = 0; \ pixel |=((((((*ptr4) >> rshift) & 0xff)*msavalue+rvalue)>>8) << rshift);\ pixel |=((((((*ptr4) >> gshift) & 0xff)*msavalue+gvalue)>>8) << gshift);\ pixel |=((((((*ptr4) >> bshift) & 0xff)*msavalue+bvalue)>>8) << bshift);\ *ptr4 = pixel; \ } #ifdef WIN32 #include "..\swrast\s_linetemp.h" #else #include "swrast/s_linetemp.h" #endif } /* * Draw a flat-shaded, Z-less, alpha-blended, RGB line into an osmesa buffer. * XXX update for GLchan */ static void flat_blend_rgba_z_line( GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1 ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); const GLint rshift = osmesa->rshift; const GLint gshift = osmesa->gshift; const GLint bshift = osmesa->bshift; const GLint avalue = vert0->color[3]; const GLint msavalue = 256 - avalue; const GLint rvalue = vert0->color[0]*avalue; const GLint gvalue = vert0->color[1]*avalue; const GLint bvalue = vert0->color[2]*avalue; #define INTERP_XY 1 #define INTERP_Z 1 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE #define CLIP_HACK 1 #define PLOT(X,Y) \ if (Z < *zPtr) { \ GLuint *ptr4 = (GLuint *) PIXELADDR4(X, Y); \ GLuint pixel = 0; \ pixel |=((((((*ptr4) >> rshift) & 0xff)*msavalue+rvalue)>>8) << rshift); \ pixel |=((((((*ptr4) >> gshift) & 0xff)*msavalue+gvalue)>>8) << gshift); \ pixel |=((((((*ptr4) >> bshift) & 0xff)*msavalue+bvalue)>>8) << bshift); \ *ptr4 = pixel; \ } #ifdef WIN32 #include "..\swrast\s_linetemp.h" #else #include "swrast/s_linetemp.h" #endif } /* * Draw a flat-shaded, Z-less, alpha-blended, RGB line into an osmesa buffer. * XXX update for GLchan */ static void flat_blend_rgba_z_line_write( GLcontext *ctx, const SWvertex *vert0, const SWvertex *vert1 ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); const GLint rshift = osmesa->rshift; const GLint gshift = osmesa->gshift; const GLint bshift = osmesa->bshift; const GLint avalue = vert0->color[3]; const GLint msavalue = 256 - avalue; const GLint rvalue = vert0->color[0]*avalue; const GLint gvalue = vert0->color[1]*avalue; const GLint bvalue = vert0->color[2]*avalue; #define INTERP_XY 1 #define INTERP_Z 1 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE #define CLIP_HACK 1 #define PLOT(X,Y) \ if (Z < *zPtr) { \ GLuint *ptr4 = (GLuint *) PIXELADDR4(X, Y); \ GLuint pixel = 0; \ pixel |=((((((*ptr4) >> rshift) & 0xff)*msavalue+rvalue)>>8) << rshift); \ pixel |=((((((*ptr4) >> gshift) & 0xff)*msavalue+gvalue)>>8) << gshift); \ pixel |=((((((*ptr4) >> bshift) & 0xff)*msavalue+bvalue)>>8) << bshift); \ *ptr4 = pixel; \ *zPtr = Z; \ } #ifdef WIN32 #include "..\swrast\s_linetemp.h" #else #include "swrast/s_linetemp.h" #endif } /* * Analyze context state to see if we can provide a fast line drawing * function, like those in lines.c. Otherwise, return NULL. */ static swrast_line_func osmesa_choose_line_function( GLcontext *ctx ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); const SWcontext *swrast = SWRAST_CONTEXT(ctx); if (CHAN_BITS != 8) return NULL; if (ctx->RenderMode != GL_RENDER) return NULL; if (ctx->Line.SmoothFlag) return NULL; if (ctx->Texture._ReallyEnabled) return NULL; if (ctx->Light.ShadeModel != GL_FLAT) return NULL; if (ctx->Line.Width != 1.0F) return NULL; if (ctx->Line.StippleFlag) return NULL; if (ctx->Line.SmoothFlag) return NULL; if (osmesa->format != OSMESA_RGBA && osmesa->format != OSMESA_BGRA && osmesa->format != OSMESA_ARGB) return NULL; if (swrast->_RasterMask==DEPTH_BIT && ctx->Depth.Func==GL_LESS && ctx->Depth.Mask==GL_TRUE && ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS) { return flat_rgba_z_line; } if (swrast->_RasterMask == 0) { return flat_rgba_line; } if (swrast->_RasterMask==(DEPTH_BIT|BLEND_BIT) && ctx->Depth.Func==GL_LESS && ctx->Depth.Mask==GL_TRUE && ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS && ctx->Color.BlendSrcRGB==GL_SRC_ALPHA && ctx->Color.BlendDstRGB==GL_ONE_MINUS_SRC_ALPHA && ctx->Color.BlendSrcA==GL_SRC_ALPHA && ctx->Color.BlendDstA==GL_ONE_MINUS_SRC_ALPHA && ctx->Color.BlendEquation==GL_FUNC_ADD_EXT) { return flat_blend_rgba_z_line_write; } if (swrast->_RasterMask==(DEPTH_BIT|BLEND_BIT) && ctx->Depth.Func==GL_LESS && ctx->Depth.Mask==GL_FALSE && ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS && ctx->Color.BlendSrcRGB==GL_SRC_ALPHA && ctx->Color.BlendDstRGB==GL_ONE_MINUS_SRC_ALPHA && ctx->Color.BlendSrcA==GL_SRC_ALPHA && ctx->Color.BlendDstA==GL_ONE_MINUS_SRC_ALPHA && ctx->Color.BlendEquation==GL_FUNC_ADD_EXT) { return flat_blend_rgba_z_line; } if (swrast->_RasterMask==BLEND_BIT && ctx->Color.BlendSrcRGB==GL_SRC_ALPHA && ctx->Color.BlendDstRGB==GL_ONE_MINUS_SRC_ALPHA && ctx->Color.BlendSrcA==GL_SRC_ALPHA && ctx->Color.BlendDstA==GL_ONE_MINUS_SRC_ALPHA && ctx->Color.BlendEquation==GL_FUNC_ADD_EXT) { return flat_blend_rgba_line; } return NULL; } /**********************************************************************/ /***** Optimized triangle rendering *****/ /**********************************************************************/ /* * Smooth-shaded, z-less triangle, RGBA color. */ static void smooth_rgba_z_triangle( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1, const SWvertex *v2 ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define INTERP_Z 1 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE #define INTERP_RGB 1 #define INTERP_ALPHA 1 #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, len = RIGHT-LEFT; \ GLchan *img = PIXELADDR4(LEFT, Y); \ (void) fffog; \ for (i = 0; i < len; i++, img += 4) { \ GLdepth z = FixedToDepth(ffz); \ if (z < zRow[i]) { \ PACK_RGBA(img, FixedToInt(ffr), FixedToInt(ffg), \ FixedToInt(ffb), FixedToInt(ffa)); \ zRow[i] = z; \ } \ ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; ffa += fdadx;\ ffz += fdzdx; \ } \ } #ifdef WIN32 #include "..\swrast\s_tritemp.h" #else #include "swrast/s_tritemp.h" #endif } /* * Flat-shaded, z-less triangle, RGBA color. */ static void flat_rgba_z_triangle( GLcontext *ctx, const SWvertex *v0, const SWvertex *v1, const SWvertex *v2 ) { const OSMesaContext osmesa = OSMESA_CONTEXT(ctx); #define INTERP_Z 1 #define DEPTH_TYPE DEFAULT_SOFTWARE_DEPTH_TYPE #define SETUP_CODE \ GLuint pixel; \ PACK_RGBA((GLchan *) &pixel, v0->color[0], v0->color[1], \ v0->color[2], v0->color[3]); #define INNER_LOOP( LEFT, RIGHT, Y ) \ { \ GLint i, len = RIGHT-LEFT; \ GLuint *img = (GLuint *) PIXELADDR4(LEFT, Y); \ (void) fffog; \ for (i=0;iRenderMode != GL_RENDER) return (swrast_tri_func) NULL; if (ctx->Polygon.SmoothFlag) return (swrast_tri_func) NULL; if (ctx->Polygon.StippleFlag) return (swrast_tri_func) NULL; if (ctx->Texture._ReallyEnabled) return (swrast_tri_func) NULL; if (osmesa->format != OSMESA_RGBA && osmesa->format != OSMESA_BGRA && osmesa->format != OSMESA_ARGB) return (swrast_tri_func) NULL; if (swrast->_RasterMask == DEPTH_BIT && ctx->Depth.Func == GL_LESS && ctx->Depth.Mask == GL_TRUE && ctx->Visual.depthBits == DEFAULT_SOFTWARE_DEPTH_BITS) { if (ctx->Light.ShadeModel == GL_SMOOTH) { return smooth_rgba_z_triangle; } else { return flat_rgba_z_triangle; } } return (swrast_tri_func) NULL; } /* Override for the swrast triangle-selection function. Try to use one * of our internal triangle functions, otherwise fall back to the * standard swrast functions. */ static void osmesa_choose_triangle( GLcontext *ctx ) { SWcontext *swrast = SWRAST_CONTEXT(ctx); swrast->Triangle = osmesa_choose_triangle_function( ctx ); if (!swrast->Triangle) _swrast_choose_triangle( ctx ); } static void osmesa_choose_line( GLcontext *ctx ) { SWcontext *swrast = SWRAST_CONTEXT(ctx); swrast->Line = osmesa_choose_line_function( ctx ); if (!swrast->Line) _swrast_choose_line( ctx ); } #define OSMESA_NEW_LINE (_NEW_LINE | \ _NEW_TEXTURE | \ _NEW_LIGHT | \ _NEW_DEPTH | \ _NEW_RENDERMODE | \ _SWRAST_NEW_RASTERMASK) #define OSMESA_NEW_TRIANGLE (_NEW_POLYGON | \ _NEW_TEXTURE | \ _NEW_LIGHT | \ _NEW_DEPTH | \ _NEW_RENDERMODE | \ _SWRAST_NEW_RASTERMASK) /* Extend the software rasterizer with our line and triangle * functions. */ static void osmesa_register_swrast_functions( GLcontext *ctx ) { SWcontext *swrast = SWRAST_CONTEXT( ctx ); swrast->choose_line = osmesa_choose_line; swrast->choose_triangle = osmesa_choose_triangle; swrast->invalidate_line |= OSMESA_NEW_LINE; swrast->invalidate_triangle |= OSMESA_NEW_TRIANGLE; } static const GLubyte *get_string( GLcontext *ctx, GLenum name ) { (void) ctx; switch (name) { case GL_RENDERER: return (const GLubyte *) "Mesa OffScreen"; default: return NULL; } } static void osmesa_update_state( GLcontext *ctx, GLuint new_state ) { OSMesaContext osmesa = OSMESA_CONTEXT(ctx); ASSERT((void *) osmesa == (void *) ctx->DriverCtx); /* * XXX these function pointers could be initialized just once during * context creation since they don't depend on any state changes. */ ctx->Driver.GetString = get_string; ctx->Driver.UpdateState = osmesa_update_state; ctx->Driver.SetDrawBuffer = set_draw_buffer; ctx->Driver.SetReadBuffer = set_read_buffer; ctx->Driver.Accum = _swrast_Accum; ctx->Driver.Bitmap = _swrast_Bitmap; ctx->Driver.Clear = clear; ctx->Driver.CopyPixels = _swrast_CopyPixels; ctx->Driver.DrawPixels = _swrast_DrawPixels; ctx->Driver.ReadPixels = _swrast_ReadPixels; ctx->Driver.ResizeBuffersMESA = _swrast_alloc_buffers; ctx->Driver.GetBufferSize = buffer_size; ctx->Driver.TexImage1D = _mesa_store_teximage1d; ctx->Driver.TexImage2D = _mesa_store_teximage2d; ctx->Driver.TexImage3D = _mesa_store_teximage3d; ctx->Driver.TexSubImage1D = _mesa_store_texsubimage1d; ctx->Driver.TexSubImage2D = _mesa_store_texsubimage2d; ctx->Driver.TexSubImage3D = _mesa_store_texsubimage3d; ctx->Driver.TestProxyTexImage = _mesa_test_proxy_teximage; ctx->Driver.PointsFunc = _swsetup_Points; ctx->Driver.LineFunc = _swsetup_Line; ctx->Driver.TriangleFunc = _swsetup_Triangle; ctx->Driver.QuadFunc = _swsetup_Quad; ctx->Driver.BuildProjectedVertices = _swsetup_BuildProjectedVertices; ctx->Driver.RenderPrimitive = _swsetup_RenderPrimitive; ctx->Driver.RenderStart = _swsetup_RenderStart; ctx->Driver.RenderFinish = _swsetup_RenderFinish; ctx->Driver.RenderInterp = _swsetup_RenderInterp; ctx->Driver.RenderCopyPV = _swsetup_RenderCopyPV; ctx->Driver.RenderClippedLine = _swsetup_RenderClippedLine; ctx->Driver.RenderClippedPolygon = _swsetup_RenderClippedPolygon; /* RGB(A) span/pixel functions */ if (osmesa->format == OSMESA_RGB) { ctx->Driver.WriteRGBASpan = write_rgba_span_RGB; ctx->Driver.WriteRGBSpan = write_rgb_span_RGB; ctx->Driver.WriteMonoRGBASpan = write_monocolor_span_RGB; ctx->Driver.WriteRGBAPixels = write_rgba_pixels_RGB; ctx->Driver.WriteMonoRGBAPixels = write_monocolor_pixels_RGB; ctx->Driver.ReadRGBASpan = read_rgba_span3; ctx->Driver.ReadRGBAPixels = read_rgba_pixels3; } else if (osmesa->format == OSMESA_BGR) { ctx->Driver.WriteRGBASpan = write_rgba_span_BGR; ctx->Driver.WriteRGBSpan = write_rgb_span_BGR; ctx->Driver.WriteMonoRGBASpan = write_monocolor_span_BGR; ctx->Driver.WriteRGBAPixels = write_rgba_pixels_BGR; ctx->Driver.WriteMonoRGBAPixels = write_monocolor_pixels_BGR; ctx->Driver.ReadRGBASpan = read_rgba_span3; ctx->Driver.ReadRGBAPixels = read_rgba_pixels3; } else { /* 4 bytes / pixel in frame buffer */ ctx->Driver.WriteRGBSpan = write_rgb_span; ctx->Driver.WriteRGBAPixels = write_rgba_pixels; ctx->Driver.WriteMonoRGBASpan = write_monocolor_span; ctx->Driver.WriteMonoRGBAPixels = write_monocolor_pixels; if (osmesa->format == OSMESA_RGBA && CHAN_TYPE == GL_UNSIGNED_BYTE && RCOMP==0 && GCOMP==1 && BCOMP==2 && ACOMP==3) { /* special, fast case */ ctx->Driver.WriteRGBASpan = write_rgba_span_rgba; ctx->Driver.ReadRGBASpan = read_rgba_span_rgba; } else { ctx->Driver.WriteRGBASpan = write_rgba_span; ctx->Driver.ReadRGBASpan = read_rgba_span; } ctx->Driver.ReadRGBAPixels = read_rgba_pixels; } /* CI span/pixel functions */ ctx->Driver.WriteCI32Span = write_index32_span; ctx->Driver.WriteCI8Span = write_index8_span; ctx->Driver.WriteMonoCISpan = write_monoindex_span; ctx->Driver.WriteCI32Pixels = write_index_pixels; ctx->Driver.WriteMonoCIPixels = write_monoindex_pixels; ctx->Driver.ReadCI32Span = read_index_span; ctx->Driver.ReadCI32Pixels = read_index_pixels; _swrast_InvalidateState( ctx, new_state ); _swsetup_InvalidateState( ctx, new_state ); _ac_InvalidateState( ctx, new_state ); _tnl_InvalidateState( ctx, new_state ); }