savagestate.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/*
 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2003 S3 Graphics, 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
 * 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
 * VIA, S3 GRAPHICS, 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.
 */


#include <stdio.h>

#include "mtypes.h"
#include "enums.h"
#include "macros.h"
#include "dd.h"

#include "mm.h"
#include "savagedd.h"
#include "savagecontext.h"

#include "savagestate.h"
#include "savagetex.h"
#include "savagetris.h"
#include "savageioctl.h"
#include "savage_bci.h"

#include "swrast/swrast.h"
#include "vbo/vbo.h"
#include "tnl/tnl.h"
#include "swrast_setup/swrast_setup.h"

#include "xmlpool.h"

/* Savage4, ProSavage[DDR], SuperSavage watermarks */
#define S4_ZRLO 24
#define S4_ZRHI 24
#define S4_ZWLO 0
#define S4_ZWHI 0

#define S4_DRLO 0
#define S4_DRHI 0
#define S4_DWLO 0
#define S4_DWHI 0

#define S4_TR   15

/* Savage3D/MX/IX watermarks */
#define S3D_ZRLO 8
#define S3D_ZRHI 24
#define S3D_ZWLO 0
#define S3D_ZWHI 24

#define S3D_DRLO 0
#define S3D_DRHI 0
#define S3D_DWLO 0
#define S3D_DWHI 0

#define S3D_TR   15

static void savageBlendFunc_s4(GLcontext *);
static void savageBlendFunc_s3d(GLcontext *);

static INLINE GLuint savagePackColor(GLuint format, 
                                         GLubyte r, GLubyte g, 
                                         GLubyte b, GLubyte a)
{
    switch (format) {
        case DV_PF_8888:
            return SAVAGEPACKCOLOR8888(r,g,b,a);
        case DV_PF_565:
            return SAVAGEPACKCOLOR565(r,g,b);
        default:
            
            return 0;
    }
}


static void savageDDAlphaFunc_s4(GLcontext *ctx, GLenum func, GLfloat ref)
{
    savageBlendFunc_s4(ctx);
}
static void savageDDAlphaFunc_s3d(GLcontext *ctx, GLenum func, GLfloat ref)
{
    savageBlendFunc_s3d(ctx);
}

static void savageDDBlendEquationSeparate(GLcontext *ctx,
					  GLenum modeRGB, GLenum modeA)
{
    assert( modeRGB == modeA );

    /* BlendEquation sets ColorLogicOpEnabled in an unexpected 
     * manner.  
     */
    FALLBACK( ctx, SAVAGE_FALLBACK_LOGICOP,
	      (ctx->Color.ColorLogicOpEnabled && 
	       ctx->Color.LogicOp != GL_COPY));

   /* Can only do blend addition, not min, max, subtract, etc. */
   FALLBACK( ctx, SAVAGE_FALLBACK_BLEND_EQ,
	     modeRGB != GL_FUNC_ADD);
}


static void savageBlendFunc_s4(GLcontext *ctx)
{
    savageContextPtr imesa = SAVAGE_CONTEXT(ctx);
    u_int32_t drawLocalCtrl = imesa->regs.s4.drawLocalCtrl.ui;
    u_int32_t drawCtrl0 = imesa->regs.s4.drawCtrl0.ui;
    u_int32_t drawCtrl1 = imesa->regs.s4.drawCtrl1.ui;

    /* set up draw control register (including blending, alpha
     * test, and shading model)
     */

    imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites = GL_FALSE;

    /*
     * blend modes
     */
    if(ctx->Color.BlendEnabled){
        switch (ctx->Color.BlendDstRGB)
        {
            case GL_ZERO:
                imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode = DAM_Zero;
                break;

            case GL_ONE:
                imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode = DAM_One;
                imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_SRC_COLOR:
                imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode = DAM_SrcClr;
                imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_ONE_MINUS_SRC_COLOR:
                imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode = DAM_1SrcClr;
                imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_SRC_ALPHA:
                imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode = DAM_SrcAlpha;
                imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_ONE_MINUS_SRC_ALPHA:
                imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode = DAM_1SrcAlpha;
                imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_DST_ALPHA:
                if (imesa->glCtx->Visual.alphaBits == 0)
                {
                    imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode = DAM_One;
                }
                else
                {
                    imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode= DAM_DstAlpha;
                }
                imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_ONE_MINUS_DST_ALPHA:
                if (imesa->glCtx->Visual.alphaBits == 0)
                {
                    imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode = DAM_Zero;
                }
                else
                {
                    imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode=DAM_1DstAlpha;
                    imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites= GL_TRUE;
                }
                break;
        }

        switch (ctx->Color.BlendSrcRGB)
        {
            case GL_ZERO:
                imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode = SAM_Zero;
                break;

            case GL_ONE:
                imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode = SAM_One;
                break;

            case GL_DST_COLOR:
                imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode = SAM_DstClr;
                imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_ONE_MINUS_DST_COLOR:
                imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode = SAM_1DstClr;
                imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_SRC_ALPHA:
                imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode = SAM_SrcAlpha;
                break;

            case GL_ONE_MINUS_SRC_ALPHA:
                imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode = SAM_1SrcAlpha;
                break;

            case GL_DST_ALPHA:
                if (imesa->glCtx->Visual.alphaBits == 0)
                {
                    imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode = SAM_One;
                }
                else
                {
                    imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode= SAM_DstAlpha;
                    imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites= GL_TRUE;
                }
                break;

            case GL_ONE_MINUS_DST_ALPHA:
                if (imesa->glCtx->Visual.alphaBits == 0)          
                {
                    imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode = SAM_Zero;
                }
                else
                {
                    imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode=SAM_1DstAlpha;
                    imesa->regs.s4.drawLocalCtrl.ni.flushPdDestWrites= GL_TRUE;
                }
                break;
        }
    }
    else
    {
        imesa->regs.s4.drawLocalCtrl.ni.dstAlphaMode = DAM_Zero;
        imesa->regs.s4.drawLocalCtrl.ni.srcAlphaMode = SAM_One;
    }

    /* alpha test*/

    if(ctx->Color.AlphaEnabled) 
    {
        ACmpFunc a;
	GLubyte alphaRef;

	CLAMPED_FLOAT_TO_UBYTE(alphaRef,ctx->Color.AlphaRef);
         
        switch(ctx->Color.AlphaFunc)  { 
	case GL_NEVER: a = CF_Never; break;
	case GL_ALWAYS: a = CF_Always; break;
	case GL_LESS: a = CF_Less; break; 
	case GL_LEQUAL: a = CF_LessEqual; break;
	case GL_EQUAL: a = CF_Equal; break;
	case GL_GREATER: a = CF_Greater; break;
	case GL_GEQUAL: a = CF_GreaterEqual; break;
	case GL_NOTEQUAL: a = CF_NotEqual; break;
	default:return;
        }   
      
	imesa->regs.s4.drawCtrl1.ni.alphaTestEn = GL_TRUE;
	imesa->regs.s4.drawCtrl1.ni.alphaTestCmpFunc = a;
	imesa->regs.s4.drawCtrl0.ni.alphaRefVal = alphaRef;
    }
    else
    {
	imesa->regs.s4.drawCtrl1.ni.alphaTestEn      = GL_FALSE;
    }

    /* Set/Reset Z-after-alpha*/

    imesa->regs.s4.drawLocalCtrl.ni.wrZafterAlphaTst =
	imesa->regs.s4.drawCtrl1.ni.alphaTestEn;
    /*imesa->regs.s4.drawLocalCtrl.ni.zUpdateEn =
        ~drawLocalCtrl.ni.wrZafterAlphaTst;*/

    if (drawLocalCtrl != imesa->regs.s4.drawLocalCtrl.ui)
	imesa->dirty |= SAVAGE_UPLOAD_LOCAL;
    if (drawCtrl0 != imesa->regs.s4.drawCtrl0.ui ||
	drawCtrl1 != imesa->regs.s4.drawCtrl1.ui)
	imesa->dirty |= SAVAGE_UPLOAD_GLOBAL;
}
static void savageBlendFunc_s3d(GLcontext *ctx)
{
    savageContextPtr imesa = SAVAGE_CONTEXT(ctx);
    u_int32_t drawCtrl = imesa->regs.s3d.drawCtrl.ui;
    u_int32_t zBufCtrl = imesa->regs.s3d.zBufCtrl.ui;

    /* set up draw control register (including blending, alpha
     * test, dithering, and shading model)
     */

    imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = 0;

    /*
     * blend modes
     */
    if(ctx->Color.BlendEnabled){
        switch (ctx->Color.BlendDstRGB)
        {
            case GL_ZERO:
                imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_Zero;
                break;

            case GL_ONE:
                imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_One;
                imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_SRC_COLOR:
                imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_SrcClr;
                imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_ONE_MINUS_SRC_COLOR:
                imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_1SrcClr;
                imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_SRC_ALPHA:
                imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_SrcAlpha;
                imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_ONE_MINUS_SRC_ALPHA:
                imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_1SrcAlpha;
                imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_DST_ALPHA:
                if (imesa->glCtx->Visual.alphaBits == 0)
                {
                    imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_One;
                }
                else
                {
                    imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_DstAlpha;
                }
                imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_ONE_MINUS_DST_ALPHA:
                if (imesa->glCtx->Visual.alphaBits == 0)
                {
                    imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_Zero;
                }
                else
                {
                    imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_1DstAlpha;
                    imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                }
                break;
        }

        switch (ctx->Color.BlendSrcRGB)
        {
            case GL_ZERO:
                imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_Zero;
                break;

            case GL_ONE:
                imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_One;
                break;

            case GL_DST_COLOR:
                imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_DstClr;
                imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_ONE_MINUS_DST_COLOR:
                imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_1DstClr;
                imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                break;

            case GL_SRC_ALPHA:
                imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_SrcAlpha;
                break;

            case GL_ONE_MINUS_SRC_ALPHA:
                imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_1SrcAlpha;
                break;

            case GL_DST_ALPHA:
                if (imesa->glCtx->Visual.alphaBits == 0)
                {
                    imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_One;
                }
                else
                {
                    imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_DstAlpha;
                    imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                }
                break;

            case GL_ONE_MINUS_DST_ALPHA:
                if (imesa->glCtx->Visual.alphaBits == 0)          
                {
                    imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_Zero;
                }
                else
                {
                    imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_1DstAlpha;
                    imesa->regs.s3d.drawCtrl.ni.flushPdDestWrites = GL_TRUE;
                }
                break;
        }
    }
    else
    {
        imesa->regs.s3d.drawCtrl.ni.dstAlphaMode = DAM_Zero;
        imesa->regs.s3d.drawCtrl.ni.srcAlphaMode = SAM_One;
    }

    /* alpha test*/

    if(ctx->Color.AlphaEnabled) 
    {
        ACmpFunc a;
	GLubyte alphaRef;