| /* $Id: svgamesa24.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 "svgamesa24.h" |
| #include "swrast/swrast.h" |
| |
| |
| #if 0 |
| /* this doesn't compile with GCC on RedHat 6.1 */ |
| static INLINE int RGB2BGR24(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 RGB2BGR24(unsigned long color) |
| { |
| return (color & 0xff00)|(color>>16)|((color & 0xff)<<16); |
| } |
| #endif |
| |
| static void __svga_drawpixel24(int x, int y, GLubyte r, GLubyte g, GLubyte b) |
| { |
| unsigned long offset; |
| |
| _RGB *rgbBuffer=(void *)SVGABuffer.DrawBuffer; |
| y = SVGAInfo->height-y-1; |
| offset = y * SVGAInfo->width + x; |
| |
| rgbBuffer[offset].r=r; |
| rgbBuffer[offset].g=g; |
| rgbBuffer[offset].b=b; |
| } |
| |
| static unsigned long __svga_getpixel24(int x, int y) |
| { |
| unsigned long offset; |
| |
| _RGB *rgbBuffer=(void *)SVGABuffer.ReadBuffer; |
| y = SVGAInfo->height-y-1; |
| offset = y * SVGAInfo->width + x; |
| return rgbBuffer[offset].r<<16 | rgbBuffer[offset].g<<8 | rgbBuffer[offset].b; |
| } |
| |
| void __clear_color24( 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_red = col[0]; |
| SVGAMesa->clear_green = col[1]; |
| SVGAMesa->clear_blue = col[2]; |
| /* SVGAMesa->clear_truecolor = red<<16 | green<<8 | blue; */ |
| } |
| |
| void __clear24( 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) { |
| _RGB *rgbBuffer=(void *)SVGABuffer.FrontBuffer; |
| for (i=0;i<SVGABuffer.BufferSize / 3;i++) { |
| rgbBuffer[i].r=SVGAMesa->clear_red; |
| rgbBuffer[i].g=SVGAMesa->clear_green; |
| rgbBuffer[i].b=SVGAMesa->clear_blue; |
| } |
| } |
| else { |
| GLubyte *tmp = SVGABuffer.DrawBuffer; |
| SVGABuffer.DrawBuffer = SVGABuffer.FrontBuffer; |
| for (i=x;i<width;i++) |
| for (j=y;j<height;j++) |
| __svga_drawpixel24( i, j, SVGAMesa->clear_red, |
| SVGAMesa->clear_green, |
| SVGAMesa->clear_blue); |
| SVGABuffer.DrawBuffer = tmp; |
| } |
| mask &= ~DD_FRONT_LEFT_BIT; |
| } |
| if (mask & DD_BACK_LEFT_BIT) { |
| if (all) { |
| _RGB *rgbBuffer=(void *)SVGABuffer.BackBuffer; |
| for (i=0;i<SVGABuffer.BufferSize / 3;i++) { |
| rgbBuffer[i].r=SVGAMesa->clear_red; |
| rgbBuffer[i].g=SVGAMesa->clear_green; |
| rgbBuffer[i].b=SVGAMesa->clear_blue; |
| } |
| } |
| else { |
| GLubyte *tmp = SVGABuffer.DrawBuffer; |
| SVGABuffer.DrawBuffer = SVGABuffer.BackBuffer; |
| for (i=x;i<width;i++) |
| for (j=y;j<height;j++) |
| __svga_drawpixel24( i, j, SVGAMesa->clear_red, |
| SVGAMesa->clear_green, |
| SVGAMesa->clear_blue); |
| SVGABuffer.DrawBuffer = tmp; |
| } |
| mask &= ~DD_BACK_LEFT_BIT; |
| } |
| |
| if (mask) |
| _swrast_Clear( ctx, mask ); |
| } |
| |
| void __write_rgba_span24( 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_drawpixel24( x, y, rgba[i][RCOMP], |
| rgba[i][GCOMP], |
| rgba[i][BCOMP]); |
| } |
| } |
| } |
| else { |
| /* draw all pixels */ |
| for (i=0; i<n; i++, x++) { |
| __svga_drawpixel24( x, y, rgba[i][RCOMP], |
| rgba[i][GCOMP], |
| rgba[i][BCOMP]); |
| } |
| } |
| } |
| |
| void __write_mono_rgba_span24( const GLcontext *ctx, |
| GLuint n, GLint x, GLint y, |
| const GLchan color[4], const GLubyte mask[]) |
| { |
| int i; |
| for (i=0; i<n; i++, x++) { |
| if (mask[i]) { |
| __svga_drawpixel24( x, y, color[RCOMP], color[GCOMP], color[BCOMP]); |
| } |
| } |
| } |
| |
| void __read_rgba_span24( const GLcontext *ctx, GLuint n, GLint x, GLint y, |
| GLubyte rgba[][4] ) |
| { |
| int i; |
| for (i=0; i<n; i++, x++) { |
| *((GLint*)rgba[i]) = RGB2BGR24(__svga_getpixel24( x, y)); |
| } |
| } |
| |
| void __write_rgba_pixels24( 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_drawpixel24( x[i], y[i], rgba[i][RCOMP], |
| rgba[i][GCOMP], |
| rgba[i][BCOMP]); |
| } |
| } |
| } |
| |
| void __write_mono_rgba_pixels24( const GLcontext *ctx, |
| GLuint n, |
| const GLint x[], const GLint y[], |
| const GLchan color[4], const GLubyte mask[] ) |
| { |
| int i; |
| for (i=0; i<n; i++) { |
| if (mask[i]) { |
| __svga_drawpixel24( x[i], y[i], |
| color[RCOMP], color[GCOMP], color[BCOMP] ); |
| } |
| } |
| } |
| |
| void __read_rgba_pixels24( 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]) = RGB2BGR24(__svga_getpixel24( x[i], y[i])); |
| } |
| } |
| |
| #else |
| |
| |
| /* silence compiler warning */ |
| extern void _mesa_svga24_dummy_function(void); |
| void _mesa_svga24_dummy_function(void) |
| { |
| } |
| |
| |
| #endif |
