/* * Copyright 2000-2001 VA Linux Systems, Inc. * 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"), * to deal in the Software without restriction, including without limitation * on the rights to use, copy, modify, merge, publish, distribute, sub * license, and/or sell copies of the Software, and to permit persons to whom * the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: * Keith Whitwell */ /* $XFree86: xc/lib/GL/mesa/src/drv/mga/mgaspan.c,v 1.11 2002/10/30 12:51:36 alanh Exp $ */ #include "mtypes.h" #include "mgadd.h" #include "mgacontext.h" #include "mgaspan.h" #include "mgaioctl.h" #include "swrast/swrast.h" #define DBG 0 #define LOCAL_VARS \ __DRIdrawablePrivate *dPriv = mmesa->mesa_drawable; \ mgaScreenPrivate *mgaScreen = mmesa->mgaScreen; \ __DRIscreenPrivate *sPriv = mmesa->driScreen; \ GLuint pitch = mgaScreen->frontPitch; \ GLuint height = dPriv->h; \ char *read_buf = (char *)(sPriv->pFB + \ mmesa->readOffset + \ dPriv->x * mgaScreen->cpp + \ dPriv->y * pitch); \ char *buf = (char *)(sPriv->pFB + \ mmesa->drawOffset + \ dPriv->x * mgaScreen->cpp + \ dPriv->y * pitch); \ GLuint p; \ (void) read_buf; (void) buf; (void) p #define LOCAL_DEPTH_VARS \ __DRIdrawablePrivate *dPriv = mmesa->mesa_drawable; \ mgaScreenPrivate *mgaScreen = mmesa->mgaScreen; \ __DRIscreenPrivate *sPriv = mmesa->driScreen; \ GLuint pitch = mgaScreen->frontPitch; \ GLuint height = dPriv->h; \ char *buf = (char *)(sPriv->pFB + \ mgaScreen->depthOffset + \ dPriv->x * mgaScreen->cpp + \ dPriv->y * pitch) #define LOCAL_STENCIL_VARS LOCAL_DEPTH_VARS #define CLIPPIXEL(_x,_y) (_x >= minx && _x < maxx && \ _y >= miny && _y < maxy) #define CLIPSPAN( _x, _y, _n, _x1, _n1, _i ) \ if ( _y < miny || _y >= maxy ) { \ _n1 = 0, _x1 = x; \ } else { \ _n1 = _n; \ _x1 = _x; \ if ( _x1 < minx ) _i += (minx-_x1), n1 -= (minx-_x1), _x1 = minx; \ if ( _x1 + _n1 >= maxx ) n1 -= (_x1 + n1 - maxx); \ } #define HW_LOCK() \ mgaContextPtr mmesa = MGA_CONTEXT(ctx); \ FLUSH_BATCH(mmesa); \ LOCK_HARDWARE_QUIESCENT(mmesa); #define HW_CLIPLOOP() \ do { \ int _nc = mmesa->numClipRects; \ while (_nc--) { \ int minx = mmesa->pClipRects[_nc].x1 - mmesa->drawX; \ int miny = mmesa->pClipRects[_nc].y1 - mmesa->drawY; \ int maxx = mmesa->pClipRects[_nc].x2 - mmesa->drawX; \ int maxy = mmesa->pClipRects[_nc].y2 - mmesa->drawY; #define HW_ENDCLIPLOOP() \ } \ } while (0) #define HW_UNLOCK() \ UNLOCK_HARDWARE(mmesa); /* 16 bit, 565 rgb color spanline and pixel functions */ #define Y_FLIP(_y) (height - _y - 1) #undef INIT_MONO_PIXEL #define INIT_MONO_PIXEL(p, color) \ p = PACK_COLOR_565( color[0], color[1], color[2] ) #define WRITE_RGBA( _x, _y, r, g, b, a ) \ *(GLushort *)(buf + _x*2 + _y*pitch) = ( (((int)r & 0xf8) << 8) | \ (((int)g & 0xfc) << 3) | \ (((int)b & 0xf8) >> 3)) #define WRITE_PIXEL( _x, _y, p ) \ *(GLushort *)(buf + _x*2 + _y*pitch) = p #define READ_RGBA( rgba, _x, _y ) \ do { \ GLushort p = *(GLushort *)(read_buf + _x*2 + _y*pitch); \ rgba[0] = (((p >> 11) & 0x1f) * 255) / 31; \ rgba[1] = (((p >> 5) & 0x3f) * 255) / 63; \ rgba[2] = (((p >> 0) & 0x1f) * 255) / 31; \ rgba[3] = 255; \ } while(0) #define TAG(x) mga##x##_565 #include "spantmp.h" /* 32 bit, 8888 argb color spanline and pixel functions */ #undef INIT_MONO_PIXEL #define INIT_MONO_PIXEL(p, color) \ p = PACK_COLOR_8888( color[3], color[0], color[1], color[2] ) #define WRITE_RGBA(_x, _y, r, g, b, a) \ *(GLuint *)(buf + _x*4 + _y*pitch) = ((r << 16) | \ (g << 8) | \ (b << 0) | \ (a << 24) ) #define WRITE_PIXEL(_x, _y, p) \ *(GLuint *)(buf + _x*4 + _y*pitch) = p #define READ_RGBA(rgba, _x, _y) \ do { \ GLuint p = *(GLuint *)(read_buf + _x*4 + _y*pitch); \ rgba[0] = (p >> 16) & 0xff; \ rgba[1] = (p >> 8) & 0xff; \ rgba[2] = (p >> 0) & 0xff; \ rgba[3] = 0xff; \ } while (0) #define TAG(x) mga##x##_8888 #include "spantmp.h" /* 16 bit depthbuffer functions. */ #define WRITE_DEPTH( _x, _y, d ) \ *(GLushort *)(buf + _x*2 + _y*pitch) = d; #define READ_DEPTH( d, _x, _y ) \ d = *(GLushort *)(buf + _x*2 + _y*pitch); #define TAG(x) mga##x##_16 #include "depthtmp.h" /* 32 bit depthbuffer functions. */ #define WRITE_DEPTH( _x, _y, d ) \ *(GLuint *)(buf + _x*4 + _y*pitch) = d; #define READ_DEPTH( d, _x, _y ) \ d = *(GLuint *)(buf + _x*4 + _y*pitch); #define TAG(x) mga##x##_32 #include "depthtmp.h" /* 24/8 bit interleaved depth/stencil functions */ #define WRITE_DEPTH( _x, _y, d ) { \ GLuint tmp = *(GLuint *)(buf + _x*4 + _y*pitch); \ tmp &= 0xff; \ tmp |= (d) << 8; \ *(GLuint *)(buf + _x*4 + _y*pitch) = tmp; \ } #define READ_DEPTH( d, _x, _y ) { \ d = (*(GLuint *)(buf + _x*4 + _y*pitch) & ~0xff) >> 8; \ } #define TAG(x) mga##x##_24_8 #include "depthtmp.h" #define WRITE_STENCIL( _x, _y, d ) { \ GLuint tmp = *(GLuint *)(buf + _x*4 + _y*pitch); \ tmp &= 0xffffff00; \ tmp |= d & 0xff; \ *(GLuint *)(buf + _x*4 + _y*pitch) = tmp; \ } #define READ_STENCIL( d, _x, _y ) \ d = *(GLuint *)(buf + _x*4 + _y*pitch) & 0xff; #define TAG(x) mga##x##_24_8 #include "stenciltmp.h" /* * This function is called to specify which buffer to read and write * for software rasterization (swrast) fallbacks. This doesn't necessarily * correspond to glDrawBuffer() or glReadBuffer() calls. */ static void mgaDDSetBuffer(GLcontext *ctx, GLframebuffer *buffer, GLuint bufferBit) { mgaContextPtr mmesa = MGA_CONTEXT(ctx); unsigned int offset; assert((bufferBit == DD_FRONT_LEFT_BIT) || (bufferBit == DD_BACK_LEFT_BIT)); offset = (bufferBit == DD_FRONT_LEFT_BIT) ? mmesa->mgaScreen->frontOffset : mmesa->mgaScreen->backOffset; mmesa->drawOffset = offset; mmesa->readOffset = offset; assert( (buffer == mmesa->driDrawable->driverPrivate) || (buffer == mmesa->driReadable->driverPrivate) ); mmesa->mesa_drawable = (buffer == mmesa->driDrawable->driverPrivate) ? mmesa->driDrawable : mmesa->driReadable; } void mgaDDInitSpanFuncs( GLcontext *ctx ) { mgaContextPtr mmesa = MGA_CONTEXT(ctx); struct swrast_device_driver *swdd = _swrast_GetDeviceDriverReference(ctx); swdd->SetBuffer = mgaDDSetBuffer; switch (mmesa->mgaScreen->cpp) { case 2: swdd->WriteRGBASpan = mgaWriteRGBASpan_565; swdd->WriteRGBSpan = mgaWriteRGBSpan_565; swdd->WriteMonoRGBASpan = mgaWriteMonoRGBASpan_565; swdd->WriteRGBAPixels = mgaWriteRGBAPixels_565; swdd->WriteMonoRGBAPixels = mgaWriteMonoRGBAPixels_565; swdd->ReadRGBASpan = mgaReadRGBASpan_565; swdd->ReadRGBAPixels = mgaReadRGBAPixels_565; swdd->ReadDepthSpan = mgaReadDepthSpan_16; swdd->WriteDepthSpan = mgaWriteDepthSpan_16; swdd->ReadDepthPixels = mgaReadDepthPixels_16; swdd->WriteDepthPixels = mgaWriteDepthPixels_16; break; case 4: swdd->WriteRGBASpan = mgaWriteRGBASpan_8888; swdd->WriteRGBSpan = mgaWriteRGBSpan_8888; swdd->WriteMonoRGBASpan = mgaWriteMonoRGBASpan_8888; swdd->WriteRGBAPixels = mgaWriteRGBAPixels_8888; swdd->WriteMonoRGBAPixels = mgaWriteMonoRGBAPixels_8888; swdd->ReadRGBASpan = mgaReadRGBASpan_8888; swdd->ReadRGBAPixels = mgaReadRGBAPixels_8888; if (!mmesa->hw_stencil) { swdd->ReadDepthSpan = mgaReadDepthSpan_32; swdd->WriteDepthSpan = mgaWriteDepthSpan_32; swdd->ReadDepthPixels = mgaReadDepthPixels_32; swdd->WriteDepthPixels = mgaWriteDepthPixels_32; } else { swdd->ReadDepthSpan = mgaReadDepthSpan_24_8; swdd->WriteDepthSpan = mgaWriteDepthSpan_24_8; swdd->ReadDepthPixels = mgaReadDepthPixels_24_8; swdd->WriteDepthPixels = mgaWriteDepthPixels_24_8; swdd->ReadStencilSpan = mgaReadStencilSpan_24_8; swdd->WriteStencilSpan = mgaWriteStencilSpan_24_8; swdd->ReadStencilPixels = mgaReadStencilPixels_24_8; swdd->WriteStencilPixels = mgaWriteStencilPixels_24_8; } break; } }