diff options
Diffstat (limited to 'src/mesa/drivers/svga/svgamesa32.c')
| -rw-r--r-- | src/mesa/drivers/svga/svgamesa32.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/src/mesa/drivers/svga/svgamesa32.c b/src/mesa/drivers/svga/svgamesa32.c new file mode 100644 index 0000000000..5a3a6776ce --- /dev/null +++ b/src/mesa/drivers/svga/svgamesa32.c @@ -0,0 +1,224 @@ +/* $Id: svgamesa32.c,v 1.13 2006/11/01 19:35:23 brianp Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 5.0 + * Copyright (C) 1995-2002 Brian Paul + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the Free + * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + + +/* + * SVGA driver for Mesa. + * Original author: Brian Paul + * Additional authors: Slawomir Szczyrba <steev@hot.pl> (Mesa 3.2) + */ + +#ifdef HAVE_CONFIG_H +#include "conf.h" +#endif + +#ifdef SVGA + +#include "svgapix.h" +#include "svgamesa32.h" +#include "swrast/swrast.h" + + +#if 0 +/* this doesn't compile with GCC on RedHat 6.1 */ +static inline int RGB2BGR32(int c) +{ + asm("rorw $8, %0\n" + "rorl $16, %0\n" + "rorw $8, %0\n" + "shrl $8, %0\n" + : "=q"(c):"0"(c)); + return c; +} +#else +static unsigned long RGB2BGR32(unsigned long color) +{ + return (color & 0xff00)|(color>>16)|((color & 0xff)<<16); +} +#endif + +static void __svga_drawpixel32(int x, int y, unsigned long c) +{ + unsigned long offset; + + GLint *intBuffer=(void *)SVGABuffer.DrawBuffer; + y = SVGAInfo->height-y-1; + offset = y * SVGAInfo->width + x; + intBuffer[offset]=c; +} + +static unsigned long __svga_getpixel32(int x, int y) +{ + unsigned long offset; + + const GLint *intBuffer=(void *)SVGABuffer.ReadBuffer; + y = SVGAInfo->height-y-1; + offset = y * SVGAInfo->width + x; + return intBuffer[offset]; +} + +void __clear_color32( GLcontext *ctx, const GLfloat color[4] ) +{ + GLubyte col[3]; + CLAMPED_FLOAT_TO_UBYTE(col[0], color[0]); + CLAMPED_FLOAT_TO_UBYTE(col[1], color[1]); + CLAMPED_FLOAT_TO_UBYTE(col[2], color[2]); + SVGAMesa->clear_truecolor = (col[0] << 16) | (col[1] << 8) | col[2]; +} + +void __clear32( GLcontext *ctx, GLbitfield mask ) +{ + int i,j; + int x = ctx->DrawBuffer->_Xmin; + int y = ctx->DrawBuffer->_Ymin; + int width = ctx->DrawBuffer->_Xmax - x; + int height = ctx->DrawBuffer->_Ymax - y; + GLboolean all = (width == ctx->DrawBuffer->Width && height == ctx->DrawBuffer->height) + + if (mask & DD_FRONT_LEFT_BIT) { + if (all) { + GLint *intBuffer=(void *)SVGABuffer.FrontBuffer; + for (i=0;i<SVGABuffer.BufferSize / 4;i++) + intBuffer[i]=SVGAMesa->clear_truecolor; + } + else { + GLubyte *tmp = SVGABuffer.DrawBuffer; + SVGABuffer.DrawBuffer = SVGABuffer.FrontBuffer; + for (i=x;i<width;i++) + for (j=y;j<height;j++) + __svga_drawpixel32(i,j,SVGAMesa->clear_truecolor); + SVGABuffer.DrawBuffer = tmp; + } + mask &= ~DD_FRONT_LEFT_BIT; + } + if (mask & DD_BACK_LEFT_BIT) { + if (all) { + GLint *intBuffer=(void *)SVGABuffer.BackBuffer; + for (i=0;i<SVGABuffer.BufferSize / 4;i++) + intBuffer[i]=SVGAMesa->clear_truecolor; + } + else { + GLubyte *tmp = SVGABuffer.DrawBuffer; + SVGABuffer.DrawBuffer = SVGABuffer.BackBuffer; + for (i=x;i<width;i++) + for (j=y;j<height;j++) + __svga_drawpixel32(i,j,SVGAMesa->clear_truecolor); + SVGABuffer.DrawBuffer = tmp; + } + mask &= ~DD_BACK_LEFT_BIT; + } + + if (mask) + _swrast_Clear( ctx, mask ); +} + +void __write_rgba_span32( const GLcontext *ctx, GLuint n, GLint x, GLint y, + const GLubyte rgba[][4], const GLubyte mask[] ) +{ + int i; + if (mask) { + /* draw some pixels */ + for (i=0; i<n; i++, x++) { + if (mask[i]) { + __svga_drawpixel32( x, y, RGB2BGR32(*((GLint*)rgba[i]))); + } + } + } + else { + /* draw all pixels */ + for (i=0; i<n; i++, x++) { + __svga_drawpixel32( x, y, RGB2BGR32(*((GLint*)rgba[i]))); + } + } +} + +void __write_mono_rgba_span32( const GLcontext *ctx, + GLuint n, GLint x, GLint y, + const GLchan color[4], const GLubyte mask[]) +{ + int i; + GLuint truecolor = color[RCOMP]<<16 | color[GCOMP]<<8 | color[BCOMP]; + for (i=0; i<n; i++, x++) { + if (mask[i]) { + __svga_drawpixel32( x, y, truecolor); + } + } +} + +void __read_rgba_span32( const GLcontext *ctx, GLuint n, GLint x, GLint y, + GLubyte rgba[][4] ) +{ + int i; + for (i=0; i<n; i++, x++) { + *((GLint*)rgba[i]) = RGB2BGR32(__svga_getpixel32( x, y )); + } +} + +void __write_rgba_pixels32( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + const GLubyte rgba[][4], const GLubyte mask[] ) +{ + int i; + for (i=0; i<n; i++) { + if (mask[i]) { + __svga_drawpixel32( x[i], y[i], RGB2BGR32(*((GLint*)rgba[i]))); + } + } +} + +void __write_mono_rgba_pixels32( const GLcontext *ctx, + GLuint n, + const GLint x[], const GLint y[], + const GLchan color[4], const GLubyte mask[] ) +{ + GLuint truecolor = color[RCOMP]<<16 | color[GCOMP]<<8 | color[BCOMP]; + int i; + for (i=0; i<n; i++) { + if (mask[i]) { + __svga_drawpixel32( x[i], y[i], truecolor ); + } + } +} + +void __read_rgba_pixels32( const GLcontext *ctx, + GLuint n, const GLint x[], const GLint y[], + GLubyte rgba[][4], const GLubyte mask[] ) +{ + int i; + for (i=0; i<n; i++,x++) { + *((GLint*)rgba[i]) = RGB2BGR32(__svga_getpixel32( x[i], y[i] )); + } +} + + +#else + + +/* silence compiler warning */ +extern void _mesa_svga32_dummy_function(void); +void _mesa_svga32_dummy_function(void) +{ +} + + +#endif + |