diff options
Diffstat (limited to 'src/mga_texstate.c')
| -rw-r--r-- | src/mga_texstate.c | 902 |
1 files changed, 902 insertions, 0 deletions
diff --git a/src/mga_texstate.c b/src/mga_texstate.c new file mode 100644 index 0000000..71d264b --- /dev/null +++ b/src/mga_texstate.c @@ -0,0 +1,902 @@ +/* + * Copyright 2000-2001 VA Linux Systems, Inc. + * (c) Copyright IBM Corporation 2002 + * 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, IBM AND/OR THEIR 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: + * Ian Romanick <idr@us.ibm.com> + * Keith Whitwell <keithw@tungstengraphics.com> + */ +/* $XFree86:$ */ + +#include <stdlib.h> +#include "mm.h" +#include "mgacontext.h" +#include "mgatex.h" +#include "mgaregs.h" +#include "mgatris.h" +#include "mgaioctl.h" + +#include "context.h" +#include "enums.h" +#include "macros.h" +#include "imports.h" + +#include "simple_list.h" +#include "texformat.h" + +#define MGA_USE_TABLE_FOR_FORMAT +#ifdef MGA_USE_TABLE_FOR_FORMAT +#define TMC_nr_tformat (MESA_FORMAT_YCBCR_REV + 1) +static const unsigned TMC_tformat[ TMC_nr_tformat ] = +{ + [MESA_FORMAT_ARGB8888] = TMC_tformat_tw32, + [MESA_FORMAT_RGB565] = TMC_tformat_tw16, + [MESA_FORMAT_ARGB4444] = TMC_tformat_tw12, + [MESA_FORMAT_ARGB1555] = TMC_tformat_tw15, + [MESA_FORMAT_AL88] = TMC_tformat_tw8al, + [MESA_FORMAT_I8] = TMC_tformat_tw8a, + [MESA_FORMAT_CI8] = TMC_tformat_tw8 , + [MESA_FORMAT_YCBCR] = TMC_tformat_tw422uyvy, + [MESA_FORMAT_YCBCR_REV] = TMC_tformat_tw422, +}; +#endif + +static void +mgaSetTexImages( mgaContextPtr mmesa, + const struct gl_texture_object * tObj ) +{ + mgaTextureObjectPtr t = (mgaTextureObjectPtr) tObj->DriverData; + struct gl_texture_image *baseImage = tObj->Image[0][ tObj->BaseLevel ]; + GLint totalSize; + GLint width, height; + GLint i; + GLint numLevels; + GLint log2Width, log2Height; + GLuint txformat = 0; + GLint ofs; + + /* Set the hardware texture format + */ +#ifndef MGA_USE_TABLE_FOR_FORMAT + switch (baseImage->TexFormat->MesaFormat) { + + case MESA_FORMAT_ARGB8888: txformat = TMC_tformat_tw32; break; + case MESA_FORMAT_RGB565: txformat = TMC_tformat_tw16; break; + case MESA_FORMAT_ARGB4444: txformat = TMC_tformat_tw12; break; + case MESA_FORMAT_ARGB1555: txformat = TMC_tformat_tw15; break; + case MESA_FORMAT_AL88: txformat = TMC_tformat_tw8al; break; + case MESA_FORMAT_I8: txformat = TMC_tformat_tw8a; break; + case MESA_FORMAT_CI8: txformat = TMC_tformat_tw8; break; + case MESA_FORMAT_YCBCR: txformat = TMC_tformat_tw422uyvy; break; + case MESA_FORMAT_YCBCR_REV: txformat = TMC_tformat_tw422; break; + + default: + _mesa_problem(NULL, "unexpected texture format in %s", __FUNCTION__); + return; + } +#else + if ( (baseImage->TexFormat->MesaFormat >= TMC_nr_tformat) + || (TMC_tformat[ baseImage->TexFormat->MesaFormat ] == 0) ) + { + _mesa_problem(NULL, "unexpected texture format in %s", __FUNCTION__); + return; + } + + txformat = TMC_tformat[ baseImage->TexFormat->MesaFormat ]; + +#endif /* MGA_USE_TABLE_FOR_FORMAT */ + + driCalculateTextureFirstLastLevel( (driTextureObject *) t ); + if (tObj->Target == GL_TEXTURE_RECTANGLE_NV) { + log2Width = 0; + log2Height = 0; + } else { + log2Width = tObj->Image[0][t->base.firstLevel]->WidthLog2; + log2Height = tObj->Image[0][t->base.firstLevel]->HeightLog2; + } + + width = tObj->Image[0][t->base.firstLevel]->Width; + height = tObj->Image[0][t->base.firstLevel]->Height; + + numLevels = MIN2( t->base.lastLevel - t->base.firstLevel + 1, + MGA_IS_G200(mmesa) ? G200_TEX_MAXLEVELS : G400_TEX_MAXLEVELS); + + + totalSize = 0; + for ( i = 0 ; i < numLevels ; i++ ) { + const struct gl_texture_image * const texImage = + tObj->Image[0][ i + t->base.firstLevel ]; + int size; + + if (texImage == NULL) + break; + + size = texImage->Width * texImage->Height * + baseImage->TexFormat->TexelBytes; + + t->offsets[i] = totalSize; + t->base.dirty_images[0] |= (1<<i); + + /* All mipmaps must be 32-byte aligned */ + totalSize += (size + 31) & ~31; + + /* Since G400 calculates the offsets in hardware + * it can't handle more than one < 32 byte mipmap. + * + * Further testing has indicated that it can't + * handle any < 32 byte mipmaps. + */ + if (MGA_IS_G400( mmesa ) && size <= 32) { + i++; + break; + } + } + + /* save these values */ + numLevels = i; + t->base.lastLevel = t->base.firstLevel + numLevels - 1; + t->base.totalSize = totalSize; + + /* setup hardware register values */ + t->setup.texctl &= (TMC_tformat_MASK & TMC_tpitch_MASK + & TMC_tpitchext_MASK); + t->setup.texctl |= txformat; + + + /* Set the texture width. In order to support non-power of 2 textures and + * textures larger than 1024 texels wide, "linear" pitch must be used. For + * the linear pitch, if the width is 2048, a value of zero is used. + */ + + t->setup.texctl |= TMC_tpitchlin_enable; + t->setup.texctl |= MGA_FIELD( TMC_tpitchext, width & (2048 - 1) ); + + + /* G400 specifies the number of mip levels in a strange way. Since there + * are up to 11 levels, it requires 4 bits. Three of the bits are at the + * high end of TEXFILTER. The other bit is in the middle. Weird. + */ + numLevels--; + t->setup.texfilter &= TF_mapnb_MASK & TF_mapnbhigh_MASK & TF_reserved_MASK; + t->setup.texfilter |= MGA_FIELD( TF_mapnb, numLevels & 0x7 ); + t->setup.texfilter |= MGA_FIELD( TF_mapnbhigh, (numLevels >> 3) & 0x1 ); + + /* warp texture registers */ + ofs = MGA_IS_G200(mmesa) ? 28 : 11; + + t->setup.texwidth = (MGA_FIELD(TW_twmask, width - 1) | + MGA_FIELD(TW_rfw, (10 - log2Width - 8) & 63 ) | + MGA_FIELD(TW_tw, (log2Width + ofs ) | 0x40 )); + + t->setup.texheight = (MGA_FIELD(TH_thmask, height - 1) | + MGA_FIELD(TH_rfh, (10 - log2Height - 8) & 63 ) | + MGA_FIELD(TH_th, (log2Height + ofs ) | 0x40 )); + + mgaUploadTexImages( mmesa, t ); +} + + +/* ================================================================ + * Texture unit state management + */ + +static void mgaUpdateTextureEnvG200( GLcontext *ctx, GLuint unit ) +{ + mgaContextPtr mmesa = MGA_CONTEXT(ctx); + struct gl_texture_object *tObj = ctx->Texture.Unit[0]._Current; + mgaTextureObjectPtr t = (mgaTextureObjectPtr) tObj->DriverData; + GLenum format = tObj->Image[0][tObj->BaseLevel]->_BaseFormat; + + if (tObj != ctx->Texture.Unit[0].Current2D && + tObj != ctx->Texture.Unit[0].CurrentRect) + return; + + + t->setup.texctl &= ~TMC_tmodulate_enable; + t->setup.texctl2 &= ~(TMC_decalblend_enable | + TMC_idecal_enable | + TMC_decaldis_enable); + + switch (ctx->Texture.Unit[0].EnvMode) { + case GL_REPLACE: + if (format == GL_ALPHA) + t->setup.texctl2 |= TMC_idecal_enable; + + if (format == GL_RGB || format == GL_LUMINANCE) + mmesa->hw.alpha_sel = AC_alphasel_diffused; + else + mmesa->hw.alpha_sel = AC_alphasel_fromtex; + break; + + case GL_MODULATE: + t->setup.texctl |= TMC_tmodulate_enable; + + if (format == GL_ALPHA) + t->setup.texctl2 |= (TMC_idecal_enable | + TMC_decaldis_enable); + + if (format == GL_RGB || format == GL_LUMINANCE) + mmesa->hw.alpha_sel = AC_alphasel_diffused; + else + mmesa->hw.alpha_sel = AC_alphasel_modulated; + break; + + case GL_DECAL: + if (format == GL_RGB || format == GL_RGBA) + t->setup.texctl2 |= TMC_decalblend_enable; + else + t->setup.texctl2 |= TMC_idecal_enable; + + mmesa->hw.alpha_sel = AC_alphasel_diffused; + break; + + case GL_BLEND: + if (format == GL_ALPHA) { + t->setup.texctl2 |= TMC_idecal_enable; + mmesa->hw.alpha_sel = AC_alphasel_modulated; + } else { + t->texenv_fallback = GL_TRUE; + } + break; + + default: + break; + } +} + + +#define MGA_REPLACE 0 +#define MGA_MODULATE 1 +#define MGA_DECAL 2 +#define MGA_ADD 3 +#define MGA_MAX_COMBFUNC 4 + +static const GLuint g400_color_combine[][MGA_MAX_COMBFUNC] = +{ + /* Unit 0: + */ + { + /* GL_REPLACE + * Cv = Cs + * Av = Af + */ + (TD0_color_sel_arg1 | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_arg2), + + /* GL_MODULATE + * Cv = Cf Cs + * Av = Af + */ + (TD0_color_arg2_diffuse | + TD0_color_sel_mul | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_arg2), + + /* GL_DECAL + * Cv = Cs + * Av = Af + */ + (TD0_color_sel_arg1 | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_arg2), + + /* GL_ADD + * Cv = Cf + Cs + * Av = Af + */ + (TD0_color_arg2_diffuse | + TD0_color_add_add | + TD0_color_sel_add | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_arg2), + }, + + /* Unit 1: + */ + { + /* GL_REPLACE + * Cv = Cs + * Av = Ap + */ + (TD0_color_sel_arg1 | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_arg2), + + /* GL_MODULATE + * Cv = Cp Cs + * Av = Ap + */ + (TD0_color_arg2_prevstage | + TD0_color_sel_mul | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_arg2), + + /* GL_DECAL + * Cv = Cs + * Av = Ap + */ + (TD0_color_sel_arg1 | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_arg2), + + /* GL_ADD + * Cv = Cp + Cs + * Av = Ap + */ + (TD0_color_arg2_prevstage | + TD0_color_add_add | + TD0_color_sel_add | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_arg2), + }, +}; + +static const GLuint g400_color_alpha_combine[][MGA_MAX_COMBFUNC] = +{ + /* Unit 0: + */ + { + /* GL_REPLACE + * Cv = Cs + * Av = As + */ + (TD0_color_sel_arg1 | + TD0_alpha_sel_arg1), + + /* GL_MODULATE + * Cv = Cf Cs + * Av = Af As + */ + (TD0_color_arg2_diffuse | + TD0_color_sel_mul | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_mul), + + /* GL_DECAL + * tmp = Cf ( 1 - As ) + * Cv = tmp + Cs As + * Av = Af + */ + (TD0_color_arg2_diffuse | + TD0_color_alpha_currtex | + TD0_color_alpha1inv_enable | + TD0_color_arg1mul_alpha1 | + TD0_color_blend_enable | + TD0_color_arg1add_mulout | + TD0_color_arg2add_mulout | + TD0_color_add_add | + TD0_color_sel_add | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_arg2), + + /* GL_ADD + * Cv = Cf + Cs + * Av = Af As + */ + (TD0_color_arg2_diffuse | + TD0_color_add_add | + TD0_color_sel_add | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_mul), + }, + + /* Unit 1: + */ + { + /* GL_REPLACE + * Cv = Cs + * Av = As + */ + (TD0_color_sel_arg1 | + TD0_alpha_sel_arg1), + + /* GL_MODULATE + * Cv = Cp Cs + * Av = Ap As + */ + (TD0_color_arg2_prevstage | + TD0_color_sel_mul | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_mul), + + /* GL_DECAL + * tmp = Cp ( 1 - As ) + * Cv = tmp + Cs As + * Av = Ap + */ + (TD0_color_arg2_prevstage | + TD0_color_alpha_currtex | + TD0_color_alpha1inv_enable | + TD0_color_arg1mul_alpha1 | + TD0_color_blend_enable | + TD0_color_arg1add_mulout | + TD0_color_arg2add_mulout | + TD0_color_add_add | + TD0_color_sel_add | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_arg2), + + /* GL_ADD + * Cv = Cp + Cs + * Av = Ap As + */ + (TD0_color_arg2_prevstage | + TD0_color_add_add | + TD0_color_sel_add | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_mul), + }, +}; + +static const GLuint g400_alpha_combine[][MGA_MAX_COMBFUNC] = +{ + /* Unit 0: + */ + { + /* GL_REPLACE + * Cv = Cf + * Av = As + */ + (TD0_color_arg2_diffuse | + TD0_color_sel_arg2 | + TD0_alpha_sel_arg1), + + /* GL_MODULATE + * Cv = Cf + * Av = Af As + */ + (TD0_color_arg2_diffuse | + TD0_color_sel_arg2 | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_mul), + + /* GL_DECAL (undefined) + * Cv = Cf + * Av = Af + */ + (TD0_color_arg2_diffuse | + TD0_color_sel_arg2 | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_arg2), + + /* GL_ADD + * Cv = Cf + * Av = Af As + */ + (TD0_color_arg2_diffuse | + TD0_color_sel_arg2 | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_mul), + }, + + /* Unit 1: + */ + { + /* GL_REPLACE + * Cv = Cp + * Av = As + */ + (TD0_color_arg2_prevstage | + TD0_color_sel_arg2 | + TD0_alpha_sel_arg1), + + /* GL_MODULATE + * Cv = Cp + * Av = Ap As + */ + (TD0_color_arg2_prevstage | + TD0_color_sel_arg2 | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_mul), + + /* GL_DECAL (undefined) + * Cv = Cp + * Av = Ap + */ + (TD0_color_arg2_prevstage | + TD0_color_sel_arg2 | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_arg2), + + /* GL_ADD + * Cv = Cp + * Av = Ap As + */ + (TD0_color_arg2_prevstage | + TD0_color_sel_arg2 | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_mul), + }, +}; + +static GLboolean mgaUpdateTextureEnvBlend( GLcontext *ctx, int unit ) +{ + mgaContextPtr mmesa = MGA_CONTEXT(ctx); + const int source = mmesa->tmu_source[unit]; + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source]; + const struct gl_texture_object *tObj = texUnit->_Current; + GLuint *reg = ((GLuint *)&mmesa->setup.tdualstage0 + unit); + GLenum format = tObj->Image[0][tObj->BaseLevel]->_BaseFormat; + + *reg = 0; + + if (format == GL_ALPHA) { + /* Cv = Cf */ + *reg |= (TD0_color_arg2_diffuse | + TD0_color_sel_arg2); + /* Av = Af As */ + *reg |= (TD0_alpha_arg2_diffuse | + TD0_alpha_sel_mul); + return GL_TRUE; + } + + /* C1 = Cf ( 1 - Cs ) */ + *reg |= (TD0_color_arg1_inv_enable | + TD0_color_arg2_diffuse | + TD0_color_sel_mul); + + if (format == GL_RGB || format == GL_LUMINANCE) { + /* A1 = Af */ + *reg |= (TD0_alpha_arg2_diffuse | + TD0_alpha_sel_arg2); + } else + if (format == GL_RGBA || format == GL_LUMINANCE_ALPHA) { + /* A1 = Af As */ + *reg |= (TD0_alpha_arg2_diffuse | + TD0_alpha_sel_mul); + } else + if (format == GL_INTENSITY) { + /* A1 = Af ( 1 - As ) */ + *reg |= (TD0_alpha_arg1_inv_enable | + TD0_alpha_arg2_diffuse | + TD0_alpha_sel_mul); + } + + if (RGB_ZERO(mmesa->envcolor[source]) && + (format != GL_INTENSITY || ALPHA_ZERO(mmesa->envcolor[source]))) + return GL_TRUE; /* all done */ + + if (ctx->Texture._EnabledUnits == 0x03) + return GL_FALSE; /* need both units */ + + mmesa->force_dualtex = GL_TRUE; + reg = &mmesa->setup.tdualstage1; + *reg = 0; + + if (RGB_ZERO(mmesa->envcolor[source])) { + /* Cv = C1 */ + *reg |= (TD0_color_arg2_prevstage | + TD0_color_sel_arg2); + } else + if (RGB_ONE(mmesa->envcolor[source])) { + /* Cv = C1 + Cs */ + *reg |= (TD0_color_arg2_prevstage | + TD0_color_add_add | + TD0_color_sel_add); + } else + if (RGBA_EQUAL(mmesa->envcolor[source])) { + /* Cv = C1 + Cc Cs */ + *reg |= (TD0_color_arg2_prevstage | + TD0_color_alpha_fcol | + TD0_color_arg2mul_alpha2 | + TD0_color_arg1add_mulout | + TD0_color_add_add | + TD0_color_sel_add); + + mmesa->setup.fcol = mmesa->envcolor[source]; + } else { + return GL_FALSE; + } + + if (format != GL_INTENSITY || ALPHA_ZERO(mmesa->envcolor[source])) { + /* Av = A1 */ + *reg |= (TD0_alpha_arg2_prevstage | + TD0_alpha_sel_arg2); + } else + if (ALPHA_ONE(mmesa->envcolor[source])) { + /* Av = A1 + As */ + *reg |= (TD0_alpha_arg2_prevstage | + TD0_alpha_add_enable | + TD0_alpha_sel_add); + } else { + return GL_FALSE; + } + + return GL_TRUE; +} + +static void mgaUpdateTextureEnvG400( GLcontext *ctx, GLuint unit ) +{ + mgaContextPtr mmesa = MGA_CONTEXT( ctx ); + const int source = mmesa->tmu_source[unit]; + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source]; + const struct gl_texture_object *tObj = texUnit->_Current; + GLuint *reg = ((GLuint *)&mmesa->setup.tdualstage0 + unit); + mgaTextureObjectPtr t = (mgaTextureObjectPtr) tObj->DriverData; + GLenum format = tObj->Image[0][tObj->BaseLevel]->_BaseFormat; + + if (tObj != ctx->Texture.Unit[source].Current2D && + tObj != ctx->Texture.Unit[source].CurrentRect) + return; + + switch (ctx->Texture.Unit[source].EnvMode) { + case GL_REPLACE: + if (format == GL_ALPHA) { + *reg = g400_alpha_combine[unit][MGA_REPLACE]; + } else if (format == GL_RGB || format == GL_LUMINANCE) { + *reg = g400_color_combine[unit][MGA_REPLACE]; + } else { + *reg = g400_color_alpha_combine[unit][MGA_REPLACE]; + } + break; + + case GL_MODULATE: + if (format == GL_ALPHA) { + *reg = g400_alpha_combine[unit][MGA_MODULATE]; + } else if (format == GL_RGB || format == GL_LUMINANCE) { + *reg = g400_color_combine[unit][MGA_MODULATE]; + } else { + *reg = g400_color_alpha_combine[unit][MGA_MODULATE]; + } + break; + + case GL_DECAL: + if (format == GL_RGB) { + *reg = g400_color_combine[unit][MGA_DECAL]; + } else if (format == GL_RGBA) { + *reg = g400_color_alpha_combine[unit][MGA_DECAL]; + if (ctx->Texture._EnabledUnits != 0x03) { + /* Linear blending mode needs dual texturing enabled */ + *(reg+1) = (TD0_color_arg2_prevstage | + TD0_color_sel_arg2 | + TD0_alpha_arg2_prevstage | + TD0_alpha_sel_arg2); + mmesa->force_dualtex = GL_TRUE; + } + } else { + /* Undefined */ + *reg = g400_alpha_combine[unit][MGA_DECAL]; + } + break; + + case GL_ADD: + if (format == GL_ALPHA) { + *reg = g400_alpha_combine[unit][MGA_ADD]; + } else if (format == GL_RGB || format == GL_LUMINANCE) { + *reg = g400_color_combine[unit][MGA_ADD]; + } else if (format == GL_RGBA || format == GL_LUMINANCE_ALPHA) { + *reg = g400_color_alpha_combine[unit][MGA_ADD]; + } else if (format == GL_INTENSITY) { + /* Cv = Cf + Cs + * Av = Af + As + */ + if (unit == 0) { + *reg = (TD0_color_arg2_diffuse | + TD0_color_add_add | + TD0_color_sel_add | + TD0_alpha_arg2_diffuse | + TD0_alpha_add_enable | + TD0_alpha_sel_add); + } else { + *reg = (TD0_color_arg2_prevstage | + TD0_color_add_add | + TD0_color_sel_add | + TD0_alpha_arg2_prevstage | + TD0_alpha_add_enable | + TD0_alpha_sel_add); + } + } + break; + + case GL_BLEND: + if (!mgaUpdateTextureEnvBlend(ctx, unit)) + t->texenv_fallback = GL_TRUE; + break; + + case GL_COMBINE: + if (!mgaUpdateTextureEnvCombine(ctx, unit)) + t->texenv_fallback = GL_TRUE; + break; + default: + break; + } +} + +static void disable_tex( GLcontext *ctx, int unit ) +{ + mgaContextPtr mmesa = MGA_CONTEXT( ctx ); + + /* Texture unit disabled */ + + if ( mmesa->CurrentTexObj[unit] != NULL ) { + /* The old texture is no longer bound to this texture unit. + * Mark it as such. + */ + + mmesa->CurrentTexObj[unit]->base.bound &= ~(1UL << unit); + mmesa->CurrentTexObj[unit] = NULL; + } + + if ( unit != 0 && !mmesa->force_dualtex ) { + mmesa->setup.tdualstage1 = mmesa->setup.tdualstage0; + } + + if ( ctx->Texture._EnabledUnits == 0 ) { + mmesa->setup.dwgctl &= DC_opcod_MASK; + mmesa->setup.dwgctl |= DC_opcod_trap; + mmesa->hw.alpha_sel = AC_alphasel_diffused; + } + + mmesa->dirty |= MGA_UPLOAD_CONTEXT | (MGA_UPLOAD_TEX0 << unit); +} + +static GLboolean enable_tex( GLcontext *ctx, int unit ) +{ + mgaContextPtr mmesa = MGA_CONTEXT(ctx); + const int source = mmesa->tmu_source[unit]; + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source]; + const struct gl_texture_object *tObj = texUnit->_Current; + mgaTextureObjectPtr t = (mgaTextureObjectPtr) tObj->DriverData; + + /* Upload teximages (not pipelined) + */ + if (t->base.dirty_images[0]) { + FLUSH_BATCH( mmesa ); + mgaSetTexImages( mmesa, tObj ); + if ( t->base.memBlock == NULL ) { + return GL_FALSE; + } + } + + return GL_TRUE; +} + +static GLboolean update_tex_common( GLcontext *ctx, int unit ) +{ + mgaContextPtr mmesa = MGA_CONTEXT(ctx); + const int source = mmesa->tmu_source[unit]; + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source]; + struct gl_texture_object *tObj = texUnit->_Current; + mgaTextureObjectPtr t = (mgaTextureObjectPtr) tObj->DriverData; + + /* Fallback if there's a texture border */ + if ( tObj->Image[0][tObj->BaseLevel]->Border > 0 ) { + return GL_FALSE; + } + + + /* Update state if this is a different texture object to last + * time. + */ + if ( mmesa->CurrentTexObj[unit] != t ) { + if ( mmesa->CurrentTexObj[unit] != NULL ) { + /* The old texture is no longer bound to this texture unit. + * Mark it as such. + */ + + mmesa->CurrentTexObj[unit]->base.bound &= ~(1UL << unit); + } + + mmesa->CurrentTexObj[unit] = t; + t->base.bound |= (1UL << unit); + + driUpdateTextureLRU( (driTextureObject *) t ); /* done too often */ + } + + /* register setup */ + if ( unit == 1 ) { + mmesa->setup.tdualstage1 = mmesa->setup.tdualstage0; + } + + t->texenv_fallback = GL_FALSE; + + /* Set this before mgaUpdateTextureEnvG400() since + * GL_ARB_texture_env_crossbar may have to disable texturing. + */ + mmesa->setup.dwgctl &= DC_opcod_MASK; + mmesa->setup.dwgctl |= DC_opcod_texture_trap; + + /* FIXME: The Radeon has some cached state so that it can avoid calling + * FIXME: UpdateTextureEnv in some cases. Is that possible here? + */ + if (MGA_IS_G400(mmesa)) { + /* G400: Regardless of texture env mode, we use the alpha from the + * texture unit (AC_alphasel_fromtex) since it will have already + * been modulated by the incoming fragment color, if needed. + * We don't want (AC_alphasel_modulate) since that'll effectively + * do the modulation twice. + */ + mmesa->hw.alpha_sel = AC_alphasel_fromtex; + + mgaUpdateTextureEnvG400( ctx, unit ); + } else { + mgaUpdateTextureEnvG200( ctx, unit ); + } + + t->setup.texctl2 &= TMC_dualtex_MASK; + if (ctx->Texture._EnabledUnits == 0x03 || mmesa->force_dualtex) { + t->setup.texctl2 |= TMC_dualtex_enable; + } + + mmesa->dirty |= MGA_UPLOAD_CONTEXT | (MGA_UPLOAD_TEX0 << unit); + + FALLBACK( ctx, MGA_FALLBACK_BORDER_MODE, t->border_fallback ); + return !t->border_fallback && !t->texenv_fallback; +} + + +static GLboolean updateTextureUnit( GLcontext *ctx, int unit ) +{ + mgaContextPtr mmesa = MGA_CONTEXT( ctx ); + const int source = mmesa->tmu_source[unit]; + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[source]; + + + if ( texUnit->_ReallyEnabled == TEXTURE_2D_BIT || + texUnit->_ReallyEnabled == TEXTURE_RECT_BIT ) { + return(enable_tex( ctx, unit ) && + update_tex_common( ctx, unit )); + } + else if ( texUnit->_ReallyEnabled ) { + return GL_FALSE; + } + else { + disable_tex( ctx, unit ); + return GL_TRUE; + } +} + +/* The G400 is now programmed quite differently wrt texture environment. + */ +void mgaUpdateTextureState( GLcontext *ctx ) +{ + mgaContextPtr mmesa = MGA_CONTEXT( ctx ); + GLboolean ok; + unsigned i; + + mmesa->force_dualtex = GL_FALSE; + mmesa->fcol_used = GL_FALSE; + + /* This works around a quirk with the MGA hardware. If only OpenGL + * TEXTURE1 is enabled, then the hardware TEXTURE0 must be used. The + * hardware TEXTURE1 can ONLY be used when hardware TEXTURE0 is also used. + */ + + mmesa->tmu_source[0] = 0; + mmesa->tmu_source[1] = 1; + + if ((ctx->Texture._EnabledUnits & 0x03) == 0x02) { + /* only texture 1 enabled */ + mmesa->tmu_source[0] = 1; + mmesa->tmu_source[1] = 0; + } + + for ( i = 0, ok = GL_TRUE + ; (i < ctx->Const.MaxTextureUnits) && ok + ; i++ ) { + ok = updateTextureUnit( ctx, i ); + } + + FALLBACK( ctx, MGA_FALLBACK_TEXTURE, !ok ); +} |