From 7c652d77220610ecc19aaefa20876216b035e961 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Mon, 13 Mar 2000 18:31:51 +0000 Subject: fixed polygon stipple packing/unpacking --- src/mesa/main/image.c | 153 ++++++++++++++++++++++++++++++++++++++---------- src/mesa/main/image.h | 20 ++++--- src/mesa/main/polygon.c | 13 ++-- 3 files changed, 140 insertions(+), 46 deletions(-) (limited to 'src/mesa/main') diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c index a1a0fe20ee..6c7e66dd64 100644 --- a/src/mesa/main/image.c +++ b/src/mesa/main/image.c @@ -1,4 +1,4 @@ -/* $Id: image.c,v 1.18 2000/03/03 17:47:39 brianp Exp $ */ +/* $Id: image.c,v 1.19 2000/03/13 18:31:51 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -493,22 +493,25 @@ GLvoid *gl_pixel_addr_in_image( const struct gl_pixelstore_attrib *packing, * Unpack a 32x32 pixel polygon stipple from user memory using the * current pixel unpack settings. */ -void gl_unpack_polygon_stipple( const GLcontext *ctx, - const GLubyte *pattern, GLuint dest[32] ) +void +_mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32], + const struct gl_pixelstore_attrib *unpacking ) { - GLint i; - for (i = 0; i < 32; i++) { - GLubyte *src = (GLubyte *) gl_pixel_addr_in_image( &ctx->Unpack, pattern, - 32, 32, GL_COLOR_INDEX, GL_BITMAP, 0, i, 0 ); - dest[i] = (src[0] << 24) - | (src[1] << 16) - | (src[2] << 8) - | (src[3] ); - } - - /* Bit flipping within each byte */ - if (ctx->Unpack.LsbFirst) { - gl_flip_bytes( (GLubyte *) dest, 32 * 4 ); + GLubyte *ptrn = _mesa_unpack_bitmap( 32, 32, pattern, unpacking ); + if (ptrn) { + /* Convert pattern from GLubytes to GLuints and handle big/little + * endian differences + */ + GLubyte *p = ptrn; + GLint i; + for (i = 0; i < 32; i++) { + dest[i] = (p[0] << 24) + | (p[1] << 16) + | (p[2] << 8) + | (p[3] ); + p += 4; + } + FREE(ptrn); } } @@ -518,24 +521,23 @@ void gl_unpack_polygon_stipple( const GLcontext *ctx, * Pack polygon stipple into user memory given current pixel packing * settings. */ -void gl_pack_polygon_stipple( const GLcontext *ctx, - const GLuint pattern[32], - GLubyte *dest ) +void +_mesa_pack_polygon_stipple( const GLuint pattern[32], GLubyte *dest, + const struct gl_pixelstore_attrib *packing ) { + /* Convert pattern from GLuints to GLubytes to handle big/little + * endian differences. + */ + GLubyte ptrn[32*4]; GLint i; for (i = 0; i < 32; i++) { - GLubyte *dst = (GLubyte *) gl_pixel_addr_in_image( &ctx->Pack, dest, - 32, 32, GL_COLOR_INDEX, GL_BITMAP, 0, i, 0 ); - dst[0] = (pattern[i] >> 24) & 0xff; - dst[1] = (pattern[i] >> 16) & 0xff; - dst[2] = (pattern[i] >> 8) & 0xff; - dst[3] = (pattern[i] ) & 0xff; - - /* Bit flipping within each byte */ - if (ctx->Pack.LsbFirst) { - gl_flip_bytes( (GLubyte *) dst, 4 ); - } + ptrn[i * 4 + 0] = (GLubyte) ((pattern[i] >> 24) & 0xff); + ptrn[i * 4 + 1] = (GLubyte) ((pattern[i] >> 16) & 0xff); + ptrn[i * 4 + 2] = (GLubyte) ((pattern[i] >> 8 ) & 0xff); + ptrn[i * 4 + 3] = (GLubyte) ((pattern[i] ) & 0xff); } + + _mesa_pack_bitmap(32, 32, ptrn, dest, packing); } @@ -2827,3 +2829,94 @@ _mesa_unpack_bitmap( GLint width, GLint height, const GLubyte *pixels, return buffer; } + + +/* + * Pack bitmap data. + */ +void +_mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source, + GLubyte *dest, const struct gl_pixelstore_attrib *packing ) +{ + GLint row, width_in_bytes; + const GLubyte *src; + + if (!source) + return; + + width_in_bytes = CEILING( width, 8 ); + src = source; + for (row = 0; row < height; row++) { + GLubyte *dst = gl_pixel_addr_in_image( packing, dest, width, height, + GL_COLOR_INDEX, GL_BITMAP, + 0, row, 0 ); + if (!dst) + return; + + if (packing->SkipPixels == 0) { + MEMCPY( dst, src, width_in_bytes ); + if (packing->LsbFirst) { + gl_flip_bytes( dst, width_in_bytes ); + } + } + else { + /* handling SkipPixels is a bit tricky (no pun intended!) */ + GLint i; + if (packing->LsbFirst) { + GLubyte srcMask = 1 << (packing->SkipPixels & 0x7); + GLubyte dstMask = 128; + const GLubyte *s = src; + GLubyte *d = dst; + *d = 0; + for (i = 0; i < width; i++) { + if (*s & srcMask) { + *d |= dstMask; + } + if (srcMask == 128) { + srcMask = 1; + s++; + } + else { + srcMask = srcMask << 1; + } + if (dstMask == 1) { + dstMask = 128; + d++; + *d = 0; + } + else { + dstMask = dstMask >> 1; + } + } + } + else { + GLubyte srcMask = 128 >> (packing->SkipPixels & 0x7); + GLubyte dstMask = 128; + const GLubyte *s = src; + GLubyte *d = dst; + *d = 0; + for (i = 0; i < width; i++) { + if (*s & srcMask) { + *d |= dstMask; + } + if (srcMask == 1) { + srcMask = 128; + s++; + } + else { + srcMask = srcMask >> 1; + } + if (dstMask == 1) { + dstMask = 128; + d++; + *d = 0; + } + else { + dstMask = dstMask >> 1; + } + } + } + } + src += width_in_bytes; + } +} diff --git a/src/mesa/main/image.h b/src/mesa/main/image.h index 03651cc14a..252363c8da 100644 --- a/src/mesa/main/image.h +++ b/src/mesa/main/image.h @@ -1,10 +1,10 @@ -/* $Id: image.h,v 1.3 1999/11/11 01:22:27 brianp Exp $ */ +/* $Id: image.h,v 1.4 2000/03/13 18:31:51 brianp Exp $ */ /* * Mesa 3-D graphics library - * Version: 3.1 + * Version: 3.3 * - * Copyright (C) 1999 Brian Paul All Rights Reserved. + * 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"), @@ -62,15 +62,13 @@ gl_pixel_addr_in_image( const struct gl_pixelstore_attrib *packing, extern void -gl_unpack_polygon_stipple( const GLcontext *ctx, - const GLubyte *pattern, - GLuint dest[32] ); +_mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32], + const struct gl_pixelstore_attrib *unpacking ); extern void -gl_pack_polygon_stipple( const GLcontext *ctx, - const GLuint pattern[32], - GLubyte *dest ); +_mesa_pack_polygon_stipple( const GLuint pattern[32], GLubyte *dest, + const struct gl_pixelstore_attrib *packing ); extern void @@ -123,5 +121,9 @@ extern GLvoid * _mesa_unpack_bitmap( GLint width, GLint height, const GLubyte *pixels, const struct gl_pixelstore_attrib *packing ); +extern void +_mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source, + GLubyte *dest, const struct gl_pixelstore_attrib *packing ); + #endif diff --git a/src/mesa/main/polygon.c b/src/mesa/main/polygon.c index b461ac2998..5fb07b4120 100644 --- a/src/mesa/main/polygon.c +++ b/src/mesa/main/polygon.c @@ -1,10 +1,10 @@ -/* $Id: polygon.c,v 1.9 2000/03/03 17:47:39 brianp Exp $ */ +/* $Id: polygon.c,v 1.10 2000/03/13 18:31:51 brianp Exp $ */ /* * Mesa 3-D graphics library * Version: 3.3 * - * Copyright (C) 1999 Brian Paul All Rights Reserved. + * 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"), @@ -136,23 +136,22 @@ _mesa_PolygonMode( GLenum face, GLenum mode ) * NOTE: stipple pattern has already been unpacked. */ void -_mesa_PolygonStipple( const GLubyte *mask ) +_mesa_PolygonStipple( const GLubyte *pattern ) { GET_CURRENT_CONTEXT(ctx); - GLuint *pattern = (GLuint *) mask; /* XXX verify */ ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glPolygonStipple"); if (MESA_VERBOSE&VERBOSE_API) fprintf(stderr, "glPolygonStipple\n"); - MEMCPY( ctx->PolygonStipple, pattern, 32 * 4 ); + _mesa_unpack_polygon_stipple(pattern, ctx->PolygonStipple, &ctx->Unpack); if (ctx->Polygon.StippleFlag) { ctx->NewState |= NEW_RASTER_OPS; } if (ctx->Driver.PolygonStipple) - ctx->Driver.PolygonStipple( ctx, mask ); + ctx->Driver.PolygonStipple( ctx, (const GLubyte *) ctx->PolygonStipple ); } @@ -166,7 +165,7 @@ _mesa_GetPolygonStipple( GLubyte *dest ) if (MESA_VERBOSE&VERBOSE_API) fprintf(stderr, "glGetPolygonStipple\n"); - gl_pack_polygon_stipple( ctx, ctx->PolygonStipple, dest ); + _mesa_pack_polygon_stipple(ctx->PolygonStipple, dest, &ctx->Pack); } -- cgit v1.2.3