diff options
Diffstat (limited to 'src/mesa/drivers/osmesa/osmesa.c')
| -rw-r--r-- | src/mesa/drivers/osmesa/osmesa.c | 1594 |
1 files changed, 1594 insertions, 0 deletions
diff --git a/src/mesa/drivers/osmesa/osmesa.c b/src/mesa/drivers/osmesa/osmesa.c new file mode 100644 index 00000000000..25bba5b5e84 --- /dev/null +++ b/src/mesa/drivers/osmesa/osmesa.c @@ -0,0 +1,1594 @@ +/* $Id: osmesa.c,v 1.1 1999/08/19 00:55:42 jtg Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.1 + * + * Copyright (C) 1999 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 + */ + + +#ifdef PC_HEADER +#include "all.h" +#else +#include <stdlib.h> +#include <string.h> +#include "GL/osmesa.h" +#include "context.h" +#include "depth.h" +#include "macros.h" +#include "matrix.h" +#include "types.h" +#include "vb.h" +#endif + + +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 */ + GLuint pixel; /* current color index or RGBA pixel value */ + GLuint clearpixel; /* pixel for clearing the color 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; /* index offsets for RGBA formats */ + void *rowaddr[MAX_HEIGHT]; /* address of first pixel in each image row */ + GLboolean yup; /* TRUE -> Y increases upward */ + /* FALSE -> Y increases downward */ +}; + + + +#ifdef THREADS + +#include "mthreads.h" /* Mesa platform independent threads interface */ + +static MesaTSD osmesa_ctx_tsd; + +static void osmesa_ctx_thread_init() { + MesaInitTSD(&osmesa_ctx_tsd); +} + +static OSMesaContext osmesa_get_thread_context( void ) { + return (OSMesaContext) MesaGetTSD(&osmesa_ctx_tsd); +} + +static void osmesa_set_thread_context( OSMesaContext ctx ) { + MesaSetTSD(&osmesa_ctx_tsd, ctx, osmesa_ctx_thread_init); +} + + +#else + /* One current context for address space, all threads */ + static OSMesaContext Current = NULL; +#endif + + + +/* A forward declaration: */ +static void osmesa_update_state( GLcontext *ctx ); + + + +/**********************************************************************/ +/***** 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 ) +{ + OSMesaContext osmesa; + GLint rshift, gshift, bshift, ashift; + GLint rind, gind, bind; + GLint indexBits, alphaBits; + GLboolean rgbmode; + GLboolean swalpha; + GLuint i4 = 1; + GLubyte *i1 = (GLubyte *) &i4; + GLint little_endian = *i1; + + swalpha = GL_FALSE; + rind = gind = bind = 0; + if (format==OSMESA_COLOR_INDEX) { + indexBits = 8; + rshift = gshift = bshift = ashift = 0; + rgbmode = GL_FALSE; + } + else if (format==OSMESA_RGBA) { + indexBits = 0; + alphaBits = 8; + 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; + alphaBits = 8; + 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; + alphaBits = 8; + 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; + alphaBits = 0; + bshift = 0; + gshift = 8; + rshift = 16; + ashift = 24; + bind = 2; + gind = 1; + rind = 0; + rgbmode = GL_TRUE; + swalpha = GL_TRUE; + } + else if (format==OSMESA_BGR) { + indexBits = 0; + alphaBits = 0; + bshift = 0; + gshift = 8; + rshift = 16; + ashift = 24; + bind = 0; + gind = 1; + rind = 2; + rgbmode = GL_TRUE; + swalpha = GL_TRUE; + } + else { + return NULL; + } + + + osmesa = (OSMesaContext) calloc( 1, sizeof(struct osmesa_context) ); + if (osmesa) { + osmesa->gl_visual = gl_create_visual( rgbmode, + swalpha, /* software alpha */ + GL_FALSE, /* double buffer */ + GL_FALSE, /* stereo */ + DEPTH_BITS, + STENCIL_BITS, + ACCUM_BITS, + indexBits, + 8, 8, 8, alphaBits ); + if (!osmesa->gl_visual) { + return NULL; + } + + osmesa->gl_ctx = gl_create_context( osmesa->gl_visual, + sharelist ? sharelist->gl_ctx : (GLcontext *) NULL, + (void *) osmesa, GL_TRUE ); + if (!osmesa->gl_ctx) { + gl_destroy_visual( osmesa->gl_visual ); + free(osmesa); + return NULL; + } + osmesa->gl_buffer = gl_create_framebuffer( osmesa->gl_visual ); + if (!osmesa->gl_buffer) { + gl_destroy_visual( osmesa->gl_visual ); + gl_destroy_context( osmesa->gl_ctx ); + free(osmesa); + return NULL; + } + osmesa->format = format; + osmesa->buffer = NULL; + osmesa->width = 0; + osmesa->height = 0; + osmesa->pixel = 0; + osmesa->clearpixel = 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; + } + return osmesa; +} + + + +/* + * Destroy an Off-Screen Mesa rendering context. + * + * Input: ctx - the context to destroy + */ +void GLAPIENTRY OSMesaDestroyContext( OSMesaContext ctx ) +{ + if (ctx) { + gl_destroy_visual( ctx->gl_visual ); + gl_destroy_framebuffer( ctx->gl_buffer ); + gl_destroy_context( ctx->gl_ctx ); + free( ctx ); + } +} + + + +/* + * Recompute the values of the context's rowaddr array. + */ +static void compute_row_addresses( OSMesaContext ctx ) +{ + GLint i; + + if (ctx->yup) { + /* Y=0 is bottom line of window */ + if (ctx->format==OSMESA_COLOR_INDEX) { + /* 1-byte CI mode */ + GLubyte *origin = (GLubyte *) ctx->buffer; + for (i=0;i<MAX_HEIGHT;i++) { + ctx->rowaddr[i] = origin + i * ctx->rowlength; + } + } + else { + if ((ctx->format==OSMESA_RGB) || (ctx->format==OSMESA_BGR)) { + /* 3-byte RGB mode */ + GLubyte *origin = (GLubyte *) ctx->buffer; + for (i=0;i<MAX_HEIGHT;i++) { + ctx->rowaddr[i] = origin + (i * (ctx->rowlength*3)); + } + } else { + /* 4-byte RGBA mode */ + GLuint *origin = (GLuint *) ctx->buffer; + for (i=0;i<MAX_HEIGHT;i++) { + ctx->rowaddr[i] = origin + i * ctx->rowlength; + } + } + } + } + else { + /* Y=0 is top line of window */ + if (ctx->format==OSMESA_COLOR_INDEX) { + /* 1-byte CI mode */ + GLubyte *origin = (GLubyte *) ctx->buffer; + for (i=0;i<MAX_HEIGHT;i++) { + ctx->rowaddr[i] = origin + (ctx->height-i-1) * ctx->rowlength; + } + } + else { + if ((ctx->format==OSMESA_RGB) || (ctx->format==OSMESA_BGR)) { + /* 3-byte RGB mode */ + GLubyte *origin = (GLubyte *) ctx->buffer; + for (i=0;i<MAX_HEIGHT;i++) { + ctx->rowaddr[i] = origin + ((ctx->height-i-1) * (ctx->rowlength*3)); + } + } else { + /* 4-byte RGBA mode */ + GLuint *origin = (GLuint *) ctx->buffer; + for (i=0;i<MAX_HEIGHT;i++) { + ctx->rowaddr[i] = origin + (ctx->height-i-1) * ctx->rowlength; + } + } + } + } +} + + +/* + * 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!=GL_UNSIGNED_BYTE + || width<1 || height<1 || width>MAX_WIDTH || height>MAX_HEIGHT) { + return GL_FALSE; + } + + osmesa_update_state( ctx->gl_ctx ); + gl_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; + +#ifdef THREADS + /* Set current context for the calling thread */ + osmesa_set_thread_context(ctx); +#else + /* Set current context for the address space, all threads */ + Current = ctx; +#endif + + compute_row_addresses( ctx ); + + /* init viewport */ + if (ctx->gl_ctx->Viewport.Width==0) { + /* initialize viewport and scissor box to buffer size */ + gl_Viewport( ctx->gl_ctx, 0, 0, width, height ); + ctx->gl_ctx->Scissor.Width = width; + ctx->gl_ctx->Scissor.Height = height; + } + + return GL_TRUE; +} + + + + +OSMesaContext GLAPIENTRY OSMesaGetCurrentContext( void ) +{ +#ifdef THREADS + /* Return current handle for the calling thread */ + return osmesa_get_thread_context(); +#else + /* Return current handle for the address space, all threads */ + return Current; +#endif +} + + + +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->Depth)) { + *width = 0; + *height = 0; + *bytesPerValue = 0; + *buffer = 0; + return GL_FALSE; + } + else { + *width = c->gl_buffer->Width; + *height = c->gl_buffer->Height; + *bytesPerValue = sizeof(GLdepth); + *buffer = c->gl_buffer->Depth; + return GL_TRUE; + } +} + + + + +/**********************************************************************/ +/*** Device Driver Functions ***/ +/**********************************************************************/ + + +/* + * Useful macros: + */ +#define PACK_RGBA(R,G,B,A) ( ((R) << osmesa->rshift) \ + | ((G) << osmesa->gshift) \ + | ((B) << osmesa->bshift) \ + | ((A) << osmesa->ashift) ) + +#define PACK_RGBA2(R,G,B,A) ( ((R) << rshift) \ + | ((G) << gshift) \ + | ((B) << bshift) \ + | ((A) << ashift) ) + +#define UNPACK_RED(P) (((P) >> osmesa->rshift) & 0xff) +#define UNPACK_GREEN(P) (((P) >> osmesa->gshift) & 0xff) +#define UNPACK_BLUE(P) (((P) >> osmesa->bshift) & 0xff) +#define UNPACK_ALPHA(P) (((P) >> osmesa->ashift) & 0xff) + +#define PIXELADDR1(X,Y) ((GLubyte *) osmesa->rowaddr[Y] + (X)) +#define PIXELADDR3(X,Y) ((GLubyte *) osmesa->rowaddr[Y] + ((X)*3)) +#define PIXELADDR4(X,Y) ((GLuint *) osmesa->rowaddr[Y] + (X)) + + + + +static GLboolean set_buffer( GLcontext *ctx, GLenum mode ) +{ + (void) ctx; + if (mode==GL_FRONT_LEFT) { + return GL_TRUE; + } + else { + return GL_FALSE; + } +} + + +static void clear_index( GLcontext *ctx, GLuint index ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + osmesa->clearpixel = index; +} + + + +static void clear_color( GLcontext *ctx, + GLubyte r, GLubyte g, GLubyte b, GLubyte a ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + osmesa->clearpixel = PACK_RGBA( r, g, b, a ); +} + + + +static GLbitfield clear( GLcontext *ctx, GLbitfield mask, GLboolean all, + GLint x, GLint y, GLint width, GLint height ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + if (mask & GL_COLOR_BUFFER_BIT) { + if (osmesa->format==OSMESA_COLOR_INDEX) { + if (all) { + /* Clear whole CI buffer */ + MEMSET(osmesa->buffer, osmesa->clearpixel, + osmesa->rowlength * osmesa->height); + } + else { + /* Clear part of CI buffer */ + GLint i, j; + for (i=0;i<height;i++) { + GLubyte *ptr1 = PIXELADDR1( x, (y+i) ); + for (j=0;j<width;j++) { + *ptr1++ = osmesa->clearpixel; + } + } + } + } + else if ((osmesa->format==OSMESA_RGB)||(osmesa->format==OSMESA_BGR)) { + GLubyte rval = UNPACK_RED(osmesa->clearpixel); + GLubyte gval = UNPACK_GREEN(osmesa->clearpixel); + GLubyte bval = UNPACK_BLUE(osmesa->clearpixel); + GLint rind = osmesa->rind; + GLint gind = osmesa->gind; + GLint bind = osmesa->bind; + if (all) { + GLuint i, n; + GLubyte *ptr3 = (GLubyte *) osmesa->buffer; + /* Clear whole RGB buffer */ + n = osmesa->rowlength * osmesa->height; + for (i=0;i<n;i++) { + ptr3[rind] = rval; + ptr3[gind] = gval; + ptr3[bind] = bval; + ptr3 += 3; + } + } + else { + /* Clear part of RGB buffer */ + GLint i, j; + for (i=0;i<height;i++) { + GLubyte *ptr3 = PIXELADDR3( x, (y+i) ); + for (j=0;j<width;j++) { + ptr3[rind] = rval; + ptr3[gind] = gval; + ptr3[bind] = bval; + ptr3 += 3; + } + } + } + } + else { + if (all) { + /* Clear whole RGBA buffer */ + GLuint i, n, *ptr4; + n = osmesa->rowlength * osmesa->height; + ptr4 = (GLuint *) osmesa->buffer; + for (i=0;i<n;i++) { + *ptr4++ = osmesa->clearpixel; + } + } + else { + /* Clear part of RGBA buffer */ + GLint i, j; + for (i=0;i<height;i++) { + GLuint *ptr4 = PIXELADDR4( x, (y+i) ); + for (j=0;j<width;j++) { + *ptr4++ = osmesa->clearpixel; + } + } + } + } + } + return mask & (~GL_COLOR_BUFFER_BIT); +} + + + +static void set_index( GLcontext *ctx, GLuint index ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + osmesa->pixel = index; +} + + + +static void set_color( GLcontext *ctx, + GLubyte r, GLubyte g, GLubyte b, GLubyte a ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + osmesa->pixel = PACK_RGBA( r, g, b, a ); +} + + + +static void buffer_size( GLcontext *ctx, GLuint *width, GLuint *height ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + *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 GLubyte rgba[][4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint *ptr4 = PIXELADDR4( x, y ); + GLuint i; + GLint rshift = osmesa->rshift; + GLint gshift = osmesa->gshift; + GLint bshift = osmesa->bshift; + GLint ashift = osmesa->ashift; + if (mask) { + for (i=0;i<n;i++,ptr4++) { + if (mask[i]) { + *ptr4 = PACK_RGBA2( rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP], rgba[i][ACOMP] ); + } + } + } + else { + for (i=0;i<n;i++,ptr4++) { + *ptr4 = PACK_RGBA2( 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 GLubyte rgba[][4], + const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint *ptr4 = PIXELADDR4( x, y ); + const GLuint *rgba4 = (const GLuint *) rgba; + GLuint i; + 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 GLubyte rgb[][3], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint *ptr4 = PIXELADDR4( x, y ); + GLuint i; + GLint rshift = osmesa->rshift; + GLint gshift = osmesa->gshift; + GLint bshift = osmesa->bshift; + GLint ashift = osmesa->ashift; + if (mask) { + for (i=0;i<n;i++,ptr4++) { + if (mask[i]) { + *ptr4 = PACK_RGBA2( rgb[i][RCOMP], rgb[i][GCOMP], rgb[i][BCOMP], 255 ); + } + } + } + else { + for (i=0;i<n;i++,ptr4++) { + *ptr4 = PACK_RGBA2( 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 GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint *ptr4 = PIXELADDR4(x,y); + GLuint i; + for (i=0;i<n;i++,ptr4++) { + if (mask[i]) { + *ptr4 = osmesa->pixel; + } + } +} + + + +static void write_rgba_pixels( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + CONST GLubyte rgba[][4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + GLint rshift = osmesa->rshift; + GLint gshift = osmesa->gshift; + GLint bshift = osmesa->bshift; + GLint ashift = osmesa->ashift; + for (i=0;i<n;i++) { + if (mask[i]) { + GLuint *ptr4 = PIXELADDR4(x[i],y[i]); + *ptr4 = PACK_RGBA2( 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 GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + for (i=0;i<n;i++) { + if (mask[i]) { + GLuint *ptr4 = PIXELADDR4(x[i],y[i]); + *ptr4 = osmesa->pixel; + } + } +} + + +static void read_rgba_span( const GLcontext *ctx, GLuint n, GLint x, GLint y, + GLubyte rgba[][4] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + GLuint *ptr4 = PIXELADDR4(x,y); + for (i=0;i<n;i++) { + GLuint pixel = *ptr4++; + rgba[i][RCOMP] = UNPACK_RED(pixel); + rgba[i][GCOMP] = UNPACK_GREEN(pixel); + rgba[i][BCOMP] = UNPACK_BLUE(pixel); + rgba[i][ACOMP] = UNPACK_ALPHA(pixel); + } +} + + +/* Read RGBA pixels from an RGBA buffer */ +static void read_rgba_span_rgba( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + GLubyte rgba[][4] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint *ptr4 = PIXELADDR4(x,y); + MEMCPY( rgba, ptr4, n * 4 * sizeof(GLubyte) ); +} + + +static void read_rgba_pixels( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + GLubyte rgba[][4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + for (i=0;i<n;i++) { + if (mask[i]) { + GLuint *ptr4 = PIXELADDR4(x[i],y[i]); + GLuint pixel = *ptr4; + rgba[i][RCOMP] = UNPACK_RED(pixel); + rgba[i][GCOMP] = UNPACK_GREEN(pixel); + rgba[i][BCOMP] = UNPACK_BLUE(pixel); + rgba[i][ACOMP] = UNPACK_ALPHA(pixel); + } + } +} + +/**********************************************************************/ +/***** 3 byte RGB pixel support funcs *****/ +/**********************************************************************/ + +/* Write RGBA pixels to an RGB or BGR buffer. */ +static void write_rgba_span3( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + CONST GLubyte rgba[][4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLubyte *ptr3 = PIXELADDR3( x, y); + GLuint i; + GLint rind = osmesa->rind; + GLint gind = osmesa->gind; + GLint bind = osmesa->bind; + if (mask) { + for (i=0;i<n;i++,ptr3+=3) { + if (mask[i]) { + ptr3[rind] = rgba[i][RCOMP]; + ptr3[gind] = rgba[i][GCOMP]; + ptr3[bind] = rgba[i][BCOMP]; + } + } + } + else { + for (i=0;i<n;i++,ptr3+=3) { + ptr3[rind] = rgba[i][RCOMP]; + ptr3[gind] = rgba[i][GCOMP]; + ptr3[bind] = rgba[i][BCOMP]; + } + } +} + +/* Write RGB pixels to an RGB or BGR buffer. */ +static void write_rgb_span3( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + CONST GLubyte rgb[][3], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLubyte *ptr3 = PIXELADDR3( x, y); + GLuint i; + GLint rind = osmesa->rind; + GLint gind = osmesa->gind; + GLint bind = osmesa->bind; + if (mask) { + for (i=0;i<n;i++,ptr3+=3) { + if (mask[i]) { + ptr3[rind] = rgb[i][RCOMP]; + ptr3[gind] = rgb[i][GCOMP]; + ptr3[bind] = rgb[i][BCOMP]; + } + } + } + else { + for (i=0;i<n;i++,ptr3+=3) { + ptr3[rind] = rgb[i][RCOMP]; + ptr3[gind] = rgb[i][GCOMP]; + ptr3[bind] = rgb[i][BCOMP]; + } + } +} + + +static void write_monocolor_span3( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + + GLubyte rval = UNPACK_RED(osmesa->pixel); + GLubyte gval = UNPACK_GREEN(osmesa->pixel); + GLubyte bval = UNPACK_BLUE(osmesa->pixel); + GLint rind = osmesa->rind; + GLint gind = osmesa->gind; + GLint bind = osmesa->bind; + + + GLubyte *ptr3 = PIXELADDR3( x, y); + GLuint i; + for (i=0;i<n;i++,ptr3+=3) { + if (mask[i]) { + ptr3[rind] = rval; + ptr3[gind] = gval; + ptr3[bind] = bval; + } + } +} + +static void write_rgba_pixels3( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + CONST GLubyte rgba[][4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + GLint rind = osmesa->rind; + GLint gind = osmesa->gind; + GLint bind = osmesa->bind; + + for (i=0;i<n;i++) { + if (mask[i]) { + GLubyte *ptr3 = PIXELADDR3(x[i],y[i]); + ptr3[rind] = rgba[i][RCOMP]; + ptr3[gind] = rgba[i][GCOMP]; + ptr3[bind] = rgba[i][BCOMP]; + } + } +} + +static void write_monocolor_pixels3( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + GLint rind = osmesa->rind; + GLint gind = osmesa->gind; + GLint bind = osmesa->bind; + GLubyte rval = UNPACK_RED(osmesa->pixel); + GLubyte gval = UNPACK_GREEN(osmesa->pixel); + GLubyte bval = UNPACK_BLUE(osmesa->pixel); + for (i=0;i<n;i++) { + if (mask[i]) { + GLubyte *ptr3 = PIXELADDR3(x[i],y[i]); + ptr3[rind] = rval; + ptr3[gind] = gval; + ptr3[bind] = bval; + } + } +} + +static void read_rgba_span3( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + GLubyte rgba[][4] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + GLint rind = osmesa->rind; + GLint gind = osmesa->gind; + GLint bind = osmesa->bind; + GLubyte *ptr3 = PIXELADDR3( x, y); + for (i=0;i<n;i++,ptr3+=3) { + rgba[i][RCOMP] = ptr3[rind]; + rgba[i][GCOMP] = ptr3[gind]; + rgba[i][BCOMP] = ptr3[bind]; + rgba[i][ACOMP] = 0; + } +} + +static void read_rgba_pixels3( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + GLubyte rgba[][4], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + GLint rind = osmesa->rind; + GLint gind = osmesa->gind; + GLint bind = osmesa->bind; + for (i=0;i<n;i++) { + if (mask[i]) { + GLubyte *ptr3 = PIXELADDR3(x[i],y[i]); + rgba[i][RCOMP] = ptr3[rind]; + rgba[i][GCOMP] = ptr3[gind]; + rgba[i][BCOMP] = ptr3[bind]; + rgba[i][ACOMP] = 0; + } + } +} + + +/**********************************************************************/ +/***** 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[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLubyte *ptr1 = PIXELADDR1(x,y); + GLuint i; + if (mask) { + for (i=0;i<n;i++,ptr1++) { + if (mask[i]) { + *ptr1 = (GLubyte) index[i]; + } + } + } + else { + for (i=0;i<n;i++,ptr1++) { + *ptr1 = (GLubyte) index[i]; + } + } +} + + +/* Write 8-bit color index to buffer */ +static void write_index8_span( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + const GLubyte index[], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLubyte *ptr1 = PIXELADDR1(x,y); + GLuint i; + if (mask) { + for (i=0;i<n;i++,ptr1++) { + if (mask[i]) { + *ptr1 = (GLubyte) index[i]; + } + } + } + else { + MEMCPY( ptr1, index, n ); + } +} + + +static void write_monoindex_span( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLubyte *ptr1 = PIXELADDR1(x,y); + GLuint i; + for (i=0;i<n;i++,ptr1++) { + if (mask[i]) { + *ptr1 = (GLubyte) osmesa->pixel; + } + } +} + + +static void write_index_pixels( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + const GLuint index[], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + for (i=0;i<n;i++) { + if (mask[i]) { + GLubyte *ptr1 = PIXELADDR1(x[i],y[i]); + *ptr1 = (GLubyte) index[i]; + } + } +} + + +static void write_monoindex_pixels( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + for (i=0;i<n;i++) { + if (mask[i]) { + GLubyte *ptr1 = PIXELADDR1(x[i],y[i]); + *ptr1 = (GLubyte) osmesa->pixel; + } + } +} + + +static void read_index_span( const GLcontext *ctx, + GLuint n, GLint x, GLint y, GLuint index[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + GLubyte *ptr1 = PIXELADDR1(x,y); + for (i=0;i<n;i++,ptr1++) { + index[i] = (GLuint) *ptr1; + } +} + + +static void read_index_pixels( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + GLuint index[], const GLubyte mask[] ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLuint i; + for (i=0;i<n;i++) { + if (mask[i] ) { + GLubyte *ptr1 = PIXELADDR1(x[i],y[i]); + index[i] = (GLuint) *ptr1; + } + } +} + + + +/**********************************************************************/ +/***** Optimized line rendering *****/ +/**********************************************************************/ + + +/* + * Draw a flat-shaded, RGB line into an osmesa buffer. + */ +static void flat_rgba_line( GLcontext *ctx, + GLuint vert0, GLuint vert1, GLuint pvert ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLubyte *color = ctx->VB->ColorPtr->data[pvert]; + unsigned long pixel = PACK_RGBA( color[0], color[1], color[2], color[3] ); + +#define INTERP_XY 1 +#define CLIP_HACK 1 +#define PLOT(X,Y) { GLuint *ptr4 = PIXELADDR4(X,Y); *ptr4 = pixel; } + +#ifdef WIN32 +#include "..\linetemp.h" +#else +#include "linetemp.h" +#endif +} + + +/* + * Draw a flat-shaded, Z-less, RGB line into an osmesa buffer. + */ +static void flat_rgba_z_line( GLcontext *ctx, + GLuint vert0, GLuint vert1, GLuint pvert ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLubyte *color = ctx->VB->ColorPtr->data[pvert]; + unsigned long pixel = PACK_RGBA( color[0], color[1], color[2], color[3] ); + +#define INTERP_XY 1 +#define INTERP_Z 1 +#define CLIP_HACK 1 +#define PLOT(X,Y) \ + if (Z < *zPtr) { \ + GLuint *ptr4 = PIXELADDR4(X,Y); \ + *ptr4 = pixel; \ + *zPtr = Z; \ + } + +#ifdef WIN32 +#include "..\linetemp.h" +#else +#include "linetemp.h" +#endif +} + + +/* + * Draw a flat-shaded, alpha-blended, RGB line into an osmesa buffer. + */ +static void flat_blend_rgba_line( GLcontext *ctx, + GLuint vert0, GLuint vert1, GLuint pvert ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + struct vertex_buffer *VB = ctx->VB; + GLint rshift = osmesa->rshift; + GLint gshift = osmesa->gshift; + GLint bshift = osmesa->bshift; + GLint avalue = VB->ColorPtr->data[pvert][3]; + GLint msavalue = 255 - avalue; + GLint rvalue = VB->ColorPtr->data[pvert][0]*avalue; + GLint gvalue = VB->ColorPtr->data[pvert][1]*avalue; + GLint bvalue = VB->ColorPtr->data[pvert][2]*avalue; + +#define INTERP_XY 1 +#define CLIP_HACK 1 +#define PLOT(X,Y) \ + { GLuint *ptr4 = 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 "..\linetemp.h" +#else +#include "linetemp.h" +#endif +} + +/* + * Draw a flat-shaded, Z-less, alpha-blended, RGB line into an osmesa buffer. + */ +static void flat_blend_rgba_z_line( GLcontext *ctx, + GLuint vert0, GLuint vert1, GLuint pvert ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + struct vertex_buffer *VB = ctx->VB; + GLint rshift = osmesa->rshift; + GLint gshift = osmesa->gshift; + GLint bshift = osmesa->bshift; + GLint avalue = VB->ColorPtr->data[pvert][3]; + GLint msavalue = 256 - avalue; + GLint rvalue = VB->ColorPtr->data[pvert][0]*avalue; + GLint gvalue = VB->ColorPtr->data[pvert][1]*avalue; + GLint bvalue = VB->ColorPtr->data[pvert][2]*avalue; + +#define INTERP_XY 1 +#define INTERP_Z 1 +#define CLIP_HACK 1 +#define PLOT(X,Y) \ + if (Z < *zPtr) { \ + { GLuint *ptr4 = 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 "..\linetemp.h" +#else +#include "linetemp.h" +#endif +} + +/* + * Draw a flat-shaded, Z-less, alpha-blended, RGB line into an osmesa buffer. + */ +static void flat_blend_rgba_z_line_write( GLcontext *ctx, + GLuint vert0, GLuint vert1, GLuint pvert ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + struct vertex_buffer *VB = ctx->VB; + GLint rshift = osmesa->rshift; + GLint gshift = osmesa->gshift; + GLint bshift = osmesa->bshift; + GLint avalue = VB->ColorPtr->data[pvert][3]; + GLint msavalue = 256 - avalue; + GLint rvalue = VB->ColorPtr->data[pvert][0]*avalue; + GLint gvalue = VB->ColorPtr->data[pvert][1]*avalue; + GLint bvalue = VB->ColorPtr->data[pvert][2]*avalue; + +#define INTERP_XY 1 +#define INTERP_Z 1 +#define CLIP_HACK 1 +#define PLOT(X,Y) \ + if (Z < *zPtr) { \ + { GLuint *ptr4 = 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 "..\linetemp.h" +#else +#include "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 line_func choose_line_function( GLcontext *ctx ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + + if (ctx->Line.SmoothFlag) return NULL; + if (ctx->Texture.Enabled) return NULL; + if (ctx->Light.ShadeModel!=GL_FLAT) return NULL; + + if (ctx->Line.Width==1.0F + && ctx->Line.StippleFlag==GL_FALSE) { + + if (ctx->RasterMask==DEPTH_BIT + && ctx->Depth.Func==GL_LESS + && ctx->Depth.Mask==GL_TRUE) { + switch(osmesa->format) { + case OSMESA_RGBA: + case OSMESA_BGRA: + case OSMESA_ARGB: + return flat_rgba_z_line; + default: + return NULL; + } + } + + if (ctx->RasterMask==0) { + switch(osmesa->format) { + case OSMESA_RGBA: + case OSMESA_BGRA: + case OSMESA_ARGB: + return flat_rgba_line; + default: + return NULL; + } + } + + if (ctx->RasterMask==(DEPTH_BIT|BLEND_BIT) + && ctx->Depth.Func==GL_LESS + && ctx->Depth.Mask==GL_TRUE + && 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) { + switch(osmesa->format) { + case OSMESA_RGBA: + case OSMESA_BGRA: + case OSMESA_ARGB: + return flat_blend_rgba_z_line_write; + default: + return NULL; + } + } + + if (ctx->RasterMask==(DEPTH_BIT|BLEND_BIT) + && ctx->Depth.Func==GL_LESS + && ctx->Depth.Mask==GL_FALSE + && 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) { + switch(osmesa->format) { + case OSMESA_RGBA: + case OSMESA_BGRA: + case OSMESA_ARGB: + return flat_blend_rgba_z_line; + default: + return NULL; + } + } + + if (ctx->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) { + switch(osmesa->format) { + case OSMESA_RGBA: + case OSMESA_BGRA: + case OSMESA_ARGB: + return flat_blend_rgba_line; + default: + return NULL; + } + } + + } + return NULL; +} + + +/**********************************************************************/ +/***** Optimized triangle rendering *****/ +/**********************************************************************/ + + +/* + * Smooth-shaded, z-less triangle, RGBA color. + */ +static void smooth_rgba_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1, + GLuint v2, GLuint pv ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + GLint rshift = osmesa->rshift; + GLint gshift = osmesa->gshift; + GLint bshift = osmesa->bshift; + GLint ashift = osmesa->ashift; + (void) pv; +#define INTERP_Z 1 +#define INTERP_RGB 1 +#define INTERP_ALPHA 1 +#define INNER_LOOP( LEFT, RIGHT, Y ) \ +{ \ + GLint i, len = RIGHT-LEFT; \ + GLuint *img = PIXELADDR4(LEFT,Y); \ + for (i=0;i<len;i++,img++) { \ + GLdepth z = FixedToDepth(ffz); \ + if (z < zRow[i]) { \ + *img = PACK_RGBA2( FixedToInt(ffr), FixedToInt(ffg), \ + FixedToInt(ffb), FixedToInt(ffa) ); \ + zRow[i] = z; \ + } \ + ffr += fdrdx; ffg += fdgdx; ffb += fdbdx; ffa += fdadx;\ + ffz += fdzdx; \ + } \ +} +#ifdef WIN32 +#include "..\tritemp.h" +#else +#include "tritemp.h" +#endif +} + + + + +/* + * Flat-shaded, z-less triangle, RGBA color. + */ +static void flat_rgba_z_triangle( GLcontext *ctx, GLuint v0, GLuint v1, + GLuint v2, GLuint pv ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; +#define INTERP_Z 1 +#define SETUP_CODE \ + GLubyte r = VB->ColorPtr->data[pv][0]; \ + GLubyte g = VB->ColorPtr->data[pv][1]; \ + GLubyte b = VB->ColorPtr->data[pv][2]; \ + GLubyte a = VB->ColorPtr->data[pv][3]; \ + GLuint pixel = PACK_RGBA(r,g,b,a); + +#define INNER_LOOP( LEFT, RIGHT, Y ) \ +{ \ + GLint i, len = RIGHT-LEFT; \ + GLuint *img = PIXELADDR4(LEFT,Y); \ + for (i=0;i<len;i++,img++) { \ + GLdepth z = FixedToDepth(ffz); \ + if (z < zRow[i]) { \ + *img = pixel; \ + zRow[i] = z; \ + } \ + ffz += fdzdx; \ + } \ +} +#ifdef WIN32 +#include "..\tritemp.h" +#else +#include "tritemp.h" +#endif +} + + + +/* + * Return pointer to an accelerated triangle function if possible. + */ +static triangle_func choose_triangle_function( GLcontext *ctx ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + + if ((osmesa->format==OSMESA_RGB)||(osmesa->format==OSMESA_BGR)) return NULL; + + if (ctx->Polygon.SmoothFlag) return NULL; + if (ctx->Polygon.StippleFlag) return NULL; + if (ctx->Texture.Enabled) return NULL; + + if (ctx->RasterMask==DEPTH_BIT + && ctx->Depth.Func==GL_LESS + && ctx->Depth.Mask==GL_TRUE + && osmesa->format!=OSMESA_COLOR_INDEX) { + if (ctx->Light.ShadeModel==GL_SMOOTH) { + return smooth_rgba_z_triangle; + } + else { + return flat_rgba_z_triangle; + } + } + return NULL; +} + + + +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 ) +{ + OSMesaContext osmesa = (OSMesaContext) ctx->DriverCtx; + + ctx->Driver.GetString = get_string; + ctx->Driver.UpdateState = osmesa_update_state; + + ctx->Driver.SetBuffer = set_buffer; + ctx->Driver.Color = set_color; + ctx->Driver.Index = set_index; + ctx->Driver.ClearIndex = clear_index; + ctx->Driver.ClearColor = clear_color; + ctx->Driver.Clear = clear; + + ctx->Driver.GetBufferSize = buffer_size; + + ctx->Driver.PointsFunc = NULL; + ctx->Driver.LineFunc = choose_line_function( ctx ); + ctx->Driver.TriangleFunc = choose_triangle_function( ctx ); + + + /* RGB(A) span/pixel functions */ + if ((osmesa->format==OSMESA_RGB) || (osmesa->format==OSMESA_BGR)) { + /* 3 bytes / pixel in frame buffer */ + ctx->Driver.WriteRGBASpan = write_rgba_span3; + ctx->Driver.WriteRGBSpan = write_rgb_span3; + ctx->Driver.WriteRGBAPixels = write_rgba_pixels3; + ctx->Driver.WriteMonoRGBASpan = write_monocolor_span3; + ctx->Driver.WriteMonoRGBAPixels = write_monocolor_pixels3; + ctx->Driver.ReadRGBASpan = read_rgba_span3; + ctx->Driver.ReadRGBAPixels = read_rgba_pixels3; + } + else { + /* 4 bytes / pixel in frame buffer */ + if (osmesa->format==OSMESA_RGBA + && RCOMP==0 && GCOMP==1 && BCOMP==2 && ACOMP==3) + ctx->Driver.WriteRGBASpan = write_rgba_span_rgba; + else + ctx->Driver.WriteRGBASpan = write_rgba_span; + 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 + && RCOMP==0 && GCOMP==1 && BCOMP==2 && ACOMP==3) + ctx->Driver.ReadRGBASpan = read_rgba_span_rgba; + else + 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; +} |