| /* $Id: svgamesa8.c,v 1.1.1.1 2012/03/29 17:22:16 uid42307 Exp $ */ |
| |
| /* |
| * Mesa 3-D graphics library |
| * Version: 3.3 |
| * Copyright (C) 1995-2000 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 "svgamesa8.h" |
| #include "swrast/swrast.h" |
| |
| |
| static void __svga_drawpixel8(int x, int y, unsigned long c) |
| { |
| unsigned long offset; |
| y = SVGAInfo->height-y-1; |
| offset = y * SVGAInfo->linewidth + x; |
| SVGABuffer.DrawBuffer[offset]=c; |
| } |
| |
| static unsigned long __svga_getpixel8(int x, int y) |
| { |
| unsigned long offset; |
| y = SVGAInfo->height-y-1; |
| offset = y * SVGAInfo->linewidth + x; |
| return SVGABuffer.ReadBuffer[offset]; |
| } |
| |
| void __clear_index8( GLcontext *ctx, GLuint index ) |
| { |
| SVGAMesa->clear_index = index; |
| } |
| |
| void __clear8( 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) { |
| memset(SVGABuffer.FrontBuffer, SVGAMesa->clear_index, SVGABuffer.BufferSize); |
| } |
| else { |
| GLubyte *tmp = SVGABuffer.DrawBuffer; |
| SVGABuffer.DrawBuffer = SVGABuffer.FrontBuffer; |
| for (i=x;i<width;i++) |
| for (j=y;j<height;j++) |
| __svga_drawpixel8(i,j,SVGAMesa->clear_index); |
| SVGABuffer.DrawBuffer = tmp; |
| } |
| mask &= ~DD_FRONT_LEFT_BIT; |
| } |
| if (mask & DD_BACK_LEFT_BIT) { |
| if (all) { |
| memset(SVGABuffer.BackBuffer, SVGAMesa->clear_index, SVGABuffer.BufferSize); |
| } |
| else { |
| GLubyte *tmp = SVGABuffer.DrawBuffer; |
| SVGABuffer.DrawBuffer = SVGABuffer.BackBuffer; |
| for (i=x;i<width;i++) |
| for (j=y;j<height;j++) |
| __svga_drawpixel8(i,j,SVGAMesa->clear_index); |
| SVGABuffer.DrawBuffer = tmp; |
| } |
| mask &= ~DD_BACK_LEFT_BIT; |
| } |
| |
| if (mask) |
| _swrast_Clear( ctx, mask ); |
| } |
| |
| void __write_ci32_span8( const GLcontext *ctx, struct gl_renderbuffer *rb, |
| GLuint n, GLint x, GLint y, |
| const GLuint index[], const GLubyte mask[] ) |
| { |
| int i; |
| for (i=0;i<n;i++,x++) { |
| if (mask[i]) { |
| __svga_drawpixel8( x, y, index[i]); |
| } |
| } |
| } |
| |
| void __write_ci8_span8( const GLcontext *ctx, struct gl_renderbuffer *rb, |
| GLuint n, GLint x, GLint y, |
| const GLubyte index[], const GLubyte mask[] ) |
| { |
| int i; |
| |
| for (i=0;i<n;i++,x++) { |
| if (mask[i]) { |
| __svga_drawpixel8( x, y, index[i]); |
| } |
| } |
| } |
| |
| void __write_mono_ci_span8( const GLcontext *ctx, struct gl_renderbuffer *rb, |
| GLuint n, GLint x, GLint y, |
| GLuint colorIndex, const GLubyte mask[] ) |
| { |
| int i; |
| for (i=0;i<n;i++,x++) { |
| if (mask[i]) { |
| __svga_drawpixel8( x, y, colorIndex); |
| } |
| } |
| } |
| |
| void __read_ci32_span8( const GLcontext *ctx, struct gl_renderbuffer *rb, |
| GLuint n, GLint x, GLint y, GLuint index[]) |
| { |
| int i; |
| for (i=0; i<n; i++,x++) { |
| index[i] = __svga_getpixel8( x, y); |
| } |
| } |
| |
| void __write_ci32_pixels8( const GLcontext *ctx, struct gl_renderbuffer *rb, |
| GLuint n, const GLint x[], const GLint y[], |
| const GLuint index[], const GLubyte mask[] ) |
| { |
| int i; |
| for (i=0; i<n; i++) { |
| if (mask[i]) { |
| __svga_drawpixel8( x[i], y[i], index[i]); |
| } |
| } |
| } |
| |
| |
| void __write_mono_ci_pixels8( const GLcontext *ctx, struct gl_renderbuffer *rb, |
| GLuint n, const GLint x[], const GLint y[], |
| GLuint colorIndex, const GLubyte mask[] ) |
| { |
| int i; |
| for (i=0; i<n; i++) { |
| if (mask[i]) { |
| __svga_drawpixel8( x[i], y[i], colorIndex); |
| } |
| } |
| } |
| |
| void __read_ci32_pixels8( const GLcontext *ctx, struct gl_renderbuffer *rb, |
| GLuint n, const GLint x[], const GLint y[], |
| GLuint index[], const GLubyte mask[] ) |
| { |
| int i; |
| for (i=0; i<n; i++,x++) { |
| index[i] = __svga_getpixel8( x[i], y[i]); |
| } |
| } |
| |
| |
| #else |
| |
| |
| /* silence compiler warning */ |
| extern void _mesa_svga8_dummy_function(void); |
| void _mesa_svga8_dummy_function(void) |
| { |
| } |
| |
| |
| #endif |