| /* $Id: svgamesa16.c,v 1.1.1.1 2012/03/29 17:22:16 uid42307 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 "svgamesa16.h" |
| #include "swrast/swrast.h" |
| |
| |
| static void __svga_drawpixel16(int x, int y, unsigned long c) |
| { |
| unsigned long offset; |
| GLshort *shortBuffer=(void *)SVGABuffer.DrawBuffer; |
| y = SVGAInfo->height-y-1; |
| offset = y * SVGAInfo->width + x; |
| shortBuffer[offset]=c; |
| } |
| |
| static unsigned long __svga_getpixel16(int x, int y) |
| { |
| unsigned long offset; |
| |
| GLshort *shortBuffer=(void *)SVGABuffer.ReadBuffer; |
| y = SVGAInfo->height-y-1; |
| offset = y * SVGAInfo->width + x; |
| return shortBuffer[offset]; |
| } |
| |
| void __clear_color16( 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_hicolor = (col[0] >> 3) << 11 | |
| (col[1] >> 2) << 5 | |
| (col[2] >> 3); |
| /* SVGAMesa->clear_hicolor=(red)<<11 | (green)<<5 | (blue); */ |
| } |
| |
| void __clear16( 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) { |
| GLshort *shortBuffer=(void *)SVGABuffer.FrontBuffer; |
| for (i=0;i<SVGABuffer.BufferSize / 2;i++) |
| shortBuffer[i]=SVGAMesa->clear_hicolor; |
| } |
| else { |
| GLubyte *tmp = SVGABuffer.DrawBuffer; |
| SVGABuffer.DrawBuffer = SVGABuffer.FrontBuffer; |
| for (i=x;i<width;i++) |
| for (j=y;j<height;j++) |
| __svga_drawpixel16(i,j,SVGAMesa->clear_hicolor); |
| SVGABuffer.DrawBuffer = tmp; |
| } |
| mask &= ~DD_FRONT_LEFT_BIT; |
| } |
| if (mask & DD_BACK_LEFT_BIT) { |
| if (all) { |
| GLshort *shortBuffer=(void *)SVGABuffer.BackBuffer; |
| for (i=0;i<SVGABuffer.BufferSize / 2;i++) |
| shortBuffer[i]=SVGAMesa->clear_hicolor; |
| } |
| else { |
| GLubyte *tmp = SVGABuffer.DrawBuffer; |
| SVGABuffer.DrawBuffer = SVGABuffer.BackBuffer; |
| for (i=x;i<width;i++) |
| for (j=y;j<height;j++) |
| __svga_drawpixel16(i,j,SVGAMesa->clear_hicolor); |
| SVGABuffer.DrawBuffer = tmp; |
| } |
| mask &= ~DD_BACK_LEFT_BIT; |
| } |
| |
| if (mask) |
| _swrast_Clear( ctx, mask ); |
| } |
| |
| void __write_rgba_span16( 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_drawpixel16( x, y, (rgba[i][RCOMP]>>3)<<11 | \ |
| (rgba[i][GCOMP]>>2)<<5 | \ |
| (rgba[i][BCOMP]>>3)); |
| } |
| } |
| } |
| else { |
| /* draw all pixels */ |
| for (i=0; i<n; i++, x++) { |
| __svga_drawpixel16( x, y, (rgba[i][RCOMP]>>3)<<11 | \ |
| (rgba[i][GCOMP]>>2)<<5 | \ |
| (rgba[i][BCOMP]>>3)); |
| } |
| } |
| } |
| |
| void __write_mono_rgba_span16( const GLcontext *ctx, |
| GLuint n, GLint x, GLint y, |
| const GLchan color[4], const GLubyte mask[]) |
| { |
| GLushort hicolor=(color[RCOMP]>>3)<<11 | (color[GCOMP]>>2)<<5 | (color[BCOMP]>>3); |
| int i; |
| for (i=0; i<n; i++, x++) { |
| if (mask[i]) { |
| __svga_drawpixel16( x, y, hicolor); |
| } |
| } |
| } |
| |
| void __read_rgba_span16( const GLcontext *ctx, GLuint n, GLint x, GLint y, |
| GLubyte rgba[][4] ) |
| { |
| int i,pix; |
| for (i=0; i<n; i++, x++) { |
| pix = __svga_getpixel16( x, y ); |
| rgba[i][RCOMP] = ((pix>>11)<<3) & 0xff; |
| rgba[i][GCOMP] = ((pix>> 5)<<2) & 0xff; |
| rgba[i][BCOMP] = ((pix )<<3) & 0xff; |
| } |
| } |
| |
| void __write_rgba_pixels16( 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_drawpixel16( x[i], y[i], (rgba[i][RCOMP]>>3)<<11 | \ |
| (rgba[i][GCOMP]>>2)<<5 | \ |
| (rgba[i][BCOMP]>>3)); |
| } |
| } |
| } |
| |
| |
| void __write_mono_rgba_pixels16( const GLcontext *ctx, |
| GLuint n, |
| const GLint x[], const GLint y[], |
| const GLchan color[4], const GLubyte mask[] ) |
| { |
| GLushort hicolor=(color[RCOMP]>>3)<<11 | (color[GCOMP]>>2)<<5 | (color[BCOMP]>>3); |
| int i; |
| for (i=0; i<n; i++) { |
| if (mask[i]) { |
| __svga_drawpixel16( x[i], y[i], hicolor ); |
| } |
| } |
| } |
| |
| void __read_rgba_pixels16( const GLcontext *ctx, |
| GLuint n, const GLint x[], const GLint y[], |
| GLubyte rgba[][4], const GLubyte mask[] ) |
| { |
| int i,pix; |
| for (i=0; i<n; i++,x++) { |
| pix = __svga_getpixel16( x[i], y[i] ); |
| rgba[i][RCOMP] = ((pix>>11)<<3) & 0xff; |
| rgba[i][GCOMP] = ((pix>> 5)<<2) & 0xff; |
| rgba[i][BCOMP] = ((pix )<<3) & 0xff; |
| } |
| } |
| |
| #else |
| |
| |
| /* silence compiler warning */ |
| extern void _mesa_svga16_dummy_function(void); |
| void _mesa_svga16_dummy_function(void) |
| { |
| } |
| |
| |
| #endif |
