Moved the software rasterizer to a new directory.

1 files changed, 6 insertions, 453 deletions

diff --git a/src/mesa/main/accum.c b/src/mesa/main/accum.c
index a2c8d04880..a43472fb59 100644
--- a/src/mesa/main/accum.c
+++ b/src/mesa/main/accum.c
@@ -1,4 +1,4 @@
-/* $Id: accum.c,v 1.30 2000/10/30 13:31:59 keithw Exp $ */
+/* $Id: accum.c,v 1.31 2000/10/31 18:09:44 keithw Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -33,68 +33,12 @@
 #include "context.h"
 #include "macros.h"
 #include "mem.h"
-#include "masking.h"
-#include "span.h"
 #include "state.h"
 #include "types.h"
+#include "swrast/swrast.h"
 #endif
 
 
-/*
- * Accumulation buffer notes
- *
- * Normally, accumulation buffer values are GLshorts with values in
- * [-32767, 32767] which represent floating point colors in [-1, 1],
- * as suggested by the OpenGL specification.
- *
- * We optimize for the common case used for full-scene antialiasing:
- *    // start with accum buffer cleared to zero
- *    glAccum(GL_LOAD, w);   // or GL_ACCUM the first image
- *    glAccum(GL_ACCUM, w);
- *    ...
- *    glAccum(GL_ACCUM, w);
- *    glAccum(GL_RETURN, 1.0);
- * That is, we start with an empty accumulation buffer and accumulate
- * n images, each with weight w = 1/n.
- * In this scenario, we can simply store unscaled integer values in
- * the accum buffer instead of scaled integers.  We'll also keep track
- * of the w value so when we do GL_RETURN we simply divide the accumulated
- * values by n (=1/w).
- * This lets us avoid _many_ int->float->int conversions.
- */
-
-
-#if CHAN_BITS == 8
-#define USE_OPTIMIZED_ACCUM   /* enable the optimization */
-#endif
-
-
-
-void
-_mesa_alloc_accum_buffer( GLcontext *ctx )
-{
-   GLint n;
-
-   if (ctx->DrawBuffer->Accum) {
-      FREE( ctx->DrawBuffer->Accum );
-      ctx->DrawBuffer->Accum = NULL;
-   }
-
-   /* allocate accumulation buffer if not already present */
-   n = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height * 4 * sizeof(GLaccum);
-   ctx->DrawBuffer->Accum = (GLaccum *) MALLOC( n );
-   if (!ctx->DrawBuffer->Accum) {
-      /* unable to setup accumulation buffer */
-      gl_error( ctx, GL_OUT_OF_MEMORY, "glAccum" );
-   }
-#ifdef USE_OPTIMIZED_ACCUM
-   ctx->IntegerAccumMode = GL_TRUE;
-#else
-   ctx->IntegerAccumMode = GL_FALSE;
-#endif
-   ctx->IntegerAccumScaler = 0.0;
-}
-
 
 
 void
@@ -111,42 +55,11 @@ _mesa_ClearAccum( GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha )
 }
 
 
-
-/*
- * This is called when we fall out of optimized/unscaled accum buffer mode.
- * That is, we convert each unscaled accum buffer value into a scaled value
- * representing the range[-1, 1].
- */
-static void rescale_accum( GLcontext *ctx )
-{
-   const GLuint n = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height * 4;
-   const GLfloat fChanMax = (1 << (sizeof(GLchan) * 8)) - 1;
-   const GLfloat s = ctx->IntegerAccumScaler * (32767.0 / fChanMax);
-   GLaccum *accum = ctx->DrawBuffer->Accum;
-   GLuint i;
-
-   assert(ctx->IntegerAccumMode);
-   assert(accum);
-
-   for (i = 0; i < n; i++) {
-      accum[i] = (GLaccum) (accum[i] * s);
-   }
-
-   ctx->IntegerAccumMode = GL_FALSE;
-}
-
-
-
 void
 _mesa_Accum( GLenum op, GLfloat value )
 {
    GET_CURRENT_CONTEXT(ctx);
-   GLuint xpos, ypos, width, height, width4;
-   GLfloat acc_scale;
-   GLchan rgba[MAX_WIDTH][4];
-   const GLuint colorMask = *((GLuint *) &ctx->Color.ColorMask);
-   const GLint iChanMax = (1 << (sizeof(GLchan) * 8)) - 1;
-   const GLfloat fChanMax = (1 << (sizeof(GLchan) * 8)) - 1;
+   GLuint xpos, ypos, width, height;
    
    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glAccum");
 
@@ -155,22 +68,6 @@ _mesa_Accum( GLenum op, GLfloat value )
       return;
    }
 
-   if (!ctx->DrawBuffer->Accum) {
-      _mesa_warning(ctx, "Calling glAccum() without an accumulation buffer (low memory?)");
-      return;
-   }
-
-   if (sizeof(GLaccum)==1) {
-      acc_scale = 127.0;
-   }
-   else if (sizeof(GLaccum)==2) {
-      acc_scale = 32767.0;
-   }
-   else {
-      /* sizeof(GLaccum) > 2 (Cray) */
-      acc_scale = (float) SHRT_MAX;
-   }
-
    if (ctx->NewState)
       gl_update_state( ctx );
 
@@ -189,351 +86,7 @@ _mesa_Accum( GLenum op, GLfloat value )
       height = ctx->DrawBuffer->Height;
    }
 
-   width4 = 4 * width;
-
-   switch (op) {
-      case GL_ADD:
-         if (value != 0.0F) {
-	    const GLaccum intVal = (GLaccum) (value * acc_scale);
-	    GLuint j;
-            /* Leave optimized accum buffer mode */
-            if (ctx->IntegerAccumMode)
-               rescale_accum(ctx);
-	    for (j = 0; j < height; j++) {
-	       GLaccum * acc = ctx->DrawBuffer->Accum + ypos * width4 + 4 * xpos;
-               GLuint i;
-	       for (i = 0; i < width4; i++) {
-                  acc[i] += intVal;
-	       }
-	       ypos++;
-	    }
-	 }
-	 break;
-
-      case GL_MULT:
-         if (value != 1.0F) {
-	    GLuint j;
-            /* Leave optimized accum buffer mode */
-            if (ctx->IntegerAccumMode)
-               rescale_accum(ctx);
-	    for (j = 0; j < height; j++) {
-	       GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + 4 * xpos;
-               GLuint i;
-	       for (i = 0; i < width4; i++) {
-                  acc[i] = (GLaccum) ( (GLfloat) acc[i] * value );
-	       }
-	       ypos++;
-	    }
-	 }
-	 break;
-
-      case GL_ACCUM:
-         if (value == 0.0F)
-            return;
-
-         (*ctx->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
-                                       ctx->Pixel.DriverReadBuffer );
-
-         /* May have to leave optimized accum buffer mode */
-         if (ctx->IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
-            ctx->IntegerAccumScaler = value;
-         if (ctx->IntegerAccumMode && value != ctx->IntegerAccumScaler)
-            rescale_accum(ctx);
-            
-         RENDER_START(ctx);
-
-         if (ctx->IntegerAccumMode) {
-            /* simply add integer color values into accum buffer */
-            GLuint j;
-            GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos * 4;
-            assert(ctx->IntegerAccumScaler > 0.0);
-            assert(ctx->IntegerAccumScaler <= 1.0);
-            for (j = 0; j < height; j++) {
-               
-               GLuint i, i4;
-               gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
-               for (i = i4 = 0; i < width; i++, i4+=4) {
-                  acc[i4+0] += rgba[i][RCOMP];
-                  acc[i4+1] += rgba[i][GCOMP];
-                  acc[i4+2] += rgba[i][BCOMP];
-                  acc[i4+3] += rgba[i][ACOMP];
-               }
-               acc += width4;
-               ypos++;
-            }
-         }
-         else {
-            /* scaled integer accum buffer */
-            const GLfloat rscale = value * acc_scale / fChanMax;
-            const GLfloat gscale = value * acc_scale / fChanMax;
-            const GLfloat bscale = value * acc_scale / fChanMax;
-            const GLfloat ascale = value * acc_scale / fChanMax;
-            GLuint j;
-            for (j=0;j<height;j++) {
-               GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos * 4;
-               GLuint i;
-               gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
-               for (i=0;i<width;i++) {
-                  *acc += (GLaccum) ( (GLfloat) rgba[i][RCOMP] * rscale );  acc++;
-                  *acc += (GLaccum) ( (GLfloat) rgba[i][GCOMP] * gscale );  acc++;
-                  *acc += (GLaccum) ( (GLfloat) rgba[i][BCOMP] * bscale );  acc++;
-                  *acc += (GLaccum) ( (GLfloat) rgba[i][ACOMP] * ascale );  acc++;
-               }
-               ypos++;
-            }
-         }
-         /* restore read buffer = draw buffer (the default) */
-         (*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
-                                       ctx->Color.DriverDrawBuffer );
-         RENDER_FINISH(ctx);
-	 break;
-
-      case GL_LOAD:
-         (*ctx->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
-                                       ctx->Pixel.DriverReadBuffer );
-
-         /* This is a change to go into optimized accum buffer mode */
-         if (value > 0.0 && value <= 1.0) {
-#ifdef USE_OPTIMIZED_ACCUM
-            ctx->IntegerAccumMode = GL_TRUE;
-#else
-            ctx->IntegerAccumMode = GL_FALSE;
-#endif
-            ctx->IntegerAccumScaler = value;
-         }
-         else {
-            ctx->IntegerAccumMode = GL_FALSE;
-            ctx->IntegerAccumScaler = 0.0;
-         }
-
-         RENDER_START(ctx);
-         if (ctx->IntegerAccumMode) {
-            /* just copy values into accum buffer */
-            GLuint j;
-            GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos * 4;
-            assert(ctx->IntegerAccumScaler > 0.0);
-            assert(ctx->IntegerAccumScaler <= 1.0);
-            for (j = 0; j < height; j++) {
-               GLuint i, i4;
-               gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
-               for (i = i4 = 0; i < width; i++, i4 += 4) {
-                  acc[i4+0] = rgba[i][RCOMP];
-                  acc[i4+1] = rgba[i][GCOMP];
-                  acc[i4+2] = rgba[i][BCOMP];
-                  acc[i4+3] = rgba[i][ACOMP];
-               }
-               acc += width4;
-               ypos++;
-            }
-         }
-         else {
-            /* scaled integer accum buffer */
-            const GLfloat rscale = value * acc_scale / fChanMax;
-            const GLfloat gscale = value * acc_scale / fChanMax;
-            const GLfloat bscale = value * acc_scale / fChanMax;
-            const GLfloat ascale = value * acc_scale / fChanMax;
-            const GLfloat d = 3.0 / acc_scale;
-            GLuint i, j;
-            for (j = 0; j < height; j++) {
-               GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos * 4;
-               gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
-               for (i=0;i<width;i++) {
-                  *acc++ = (GLaccum) ((GLfloat) rgba[i][RCOMP] * rscale + d);
-                  *acc++ = (GLaccum) ((GLfloat) rgba[i][GCOMP] * gscale + d);
-                  *acc++ = (GLaccum) ((GLfloat) rgba[i][BCOMP] * bscale + d);
-                  *acc++ = (GLaccum) ((GLfloat) rgba[i][ACOMP] * ascale + d);
-               }
-               ypos++;
-            }
-         }
-
-         /* restore read buffer = draw buffer (the default) */
-         (*ctx->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
-                                       ctx->Color.DriverDrawBuffer );
-         RENDER_FINISH(ctx);
-	 break;
-
-      case GL_RETURN:
-         /* May have to leave optimized accum buffer mode */
-         if (ctx->IntegerAccumMode && value != 1.0)
-            rescale_accum(ctx);
-
-         RENDER_START(ctx);
-         if (ctx->IntegerAccumMode && ctx->IntegerAccumScaler > 0) {
-            /* build lookup table to avoid many floating point multiplies */
-            static GLchan multTable[32768];
-            static GLfloat prevMult = 0.0;
-            const GLfloat mult = ctx->IntegerAccumScaler;
-            const GLint max = MIN2((GLint) (256 / mult), 32767);
-            GLuint j;
-            if (mult != prevMult) {
-               for (j = 0; j < max; j++)
-                  multTable[j] = (GLint) ((GLfloat) j * mult + 0.5F);
-               prevMult = mult;
-            }
-
-            assert(ctx->IntegerAccumScaler > 0.0);
-            assert(ctx->IntegerAccumScaler <= 1.0);
-            for (j = 0; j < height; j++) {
-               const GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos*4;
-               GLuint i, i4;
-               for (i = i4 = 0; i < width; i++, i4 += 4) {
-                  ASSERT(acc[i4+0] < max);
-                  ASSERT(acc[i4+1] < max);
-                  ASSERT(acc[i4+2] < max);
-                  ASSERT(acc[i4+3] < max);
-                  rgba[i][RCOMP] = multTable[acc[i4+0]];
-                  rgba[i][GCOMP] = multTable[acc[i4+1]];
-                  rgba[i][BCOMP] = multTable[acc[i4+2]];
-                  rgba[i][ACOMP] = multTable[acc[i4+3]];
-               }
-               if (colorMask != 0xffffffff) {
-                  _mesa_mask_rgba_span( ctx, width, xpos, ypos, rgba );
-               }
-               (*ctx->Driver.WriteRGBASpan)( ctx, width, xpos, ypos, 
-                                             (const GLchan (*)[4])rgba, NULL );
-               ypos++;
-            }
-         }
-         else {
-            const GLfloat rscale = value / acc_scale * fChanMax;
-            const GLfloat gscale = value / acc_scale * fChanMax;
-            const GLfloat bscale = value / acc_scale * fChanMax;
-            const GLfloat ascale = value / acc_scale * fChanMax;
-            GLuint i, j;
-            for (j=0;j<height;j++) {
-               const GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos*4;
-               for (i=0;i<width;i++) {
-                  GLint r, g, b, a;
-                  r = (GLint) ( (GLfloat) (*acc++) * rscale + 0.5F );
-                  g = (GLint) ( (GLfloat) (*acc++) * gscale + 0.5F );
-                  b = (GLint) ( (GLfloat) (*acc++) * bscale + 0.5F );
-                  a = (GLint) ( (GLfloat) (*acc++) * ascale + 0.5F );
-                  rgba[i][RCOMP] = CLAMP( r, 0, iChanMax );
-                  rgba[i][GCOMP] = CLAMP( g, 0, iChanMax );
-                  rgba[i][BCOMP] = CLAMP( b, 0, iChanMax );
-                  rgba[i][ACOMP] = CLAMP( a, 0, iChanMax );
-               }
-               if (colorMask != 0xffffffff) {
-                  _mesa_mask_rgba_span( ctx, width, xpos, ypos, rgba );
-               }
-               (*ctx->Driver.WriteRGBASpan)( ctx, width, xpos, ypos, 
-                                             (const GLchan (*)[4])rgba, NULL );
-               ypos++;
-            }
-	 }
-         RENDER_FINISH(ctx);
-	 break;
-
-      default:
-         gl_error( ctx, GL_INVALID_ENUM, "glAccum" );
-   }
-}
-
-
-
-/*
- * Clear the accumulation Buffer.
- */
-void
-_mesa_clear_accum_buffer( GLcontext *ctx )
-{
-   GLuint buffersize;
-   GLfloat acc_scale;
-
-   if (ctx->Visual.AccumRedBits==0) {
-      /* No accumulation buffer! */
-      return;
-   }
-
-   if (sizeof(GLaccum)==1) {
-      acc_scale = 127.0;
-   }
-   else if (sizeof(GLaccum)==2) {
-      acc_scale = 32767.0;
-   }
-   else {
-      /* sizeof(GLaccum) > 2 (Cray) */
-      acc_scale = (float) SHRT_MAX;
-   }
-
-   /* number of pixels */
-   buffersize = ctx->DrawBuffer->Width * ctx->DrawBuffer->Height;
-
-   if (!ctx->DrawBuffer->Accum) {
-      /* try to alloc accumulation buffer */
-      ctx->DrawBuffer->Accum = (GLaccum *)
-	                   MALLOC( buffersize * 4 * sizeof(GLaccum) );
-   }
-
-   if (ctx->DrawBuffer->Accum) {
-      if (ctx->Scissor.Enabled) {
-	 /* Limit clear to scissor box */
-	 GLaccum r, g, b, a;
-	 GLint i, j;
-         GLint width, height;
-         GLaccum *row;
-	 r = (GLaccum) (ctx->Accum.ClearColor[0] * acc_scale);
-	 g = (GLaccum) (ctx->Accum.ClearColor[1] * acc_scale);
-	 b = (GLaccum) (ctx->Accum.ClearColor[2] * acc_scale);
-	 a = (GLaccum) (ctx->Accum.ClearColor[3] * acc_scale);
-         /* size of region to clear */
-         width = 4 * (ctx->DrawBuffer->Xmax - ctx->DrawBuffer->Xmin);
-         height = ctx->DrawBuffer->Ymax - ctx->DrawBuffer->Ymin;
-         /* ptr to first element to clear */
-         row = ctx->DrawBuffer->Accum
-               + 4 * (ctx->DrawBuffer->Ymin * ctx->DrawBuffer->Width
-                      + ctx->DrawBuffer->Xmin);
-         for (j=0;j<height;j++) {
-            for (i=0;i<width;i+=4) {
-               row[i+0] = r;
-               row[i+1] = g;
-               row[i+2] = b;
-               row[i+3] = a;
-	    }
-            row += 4 * ctx->DrawBuffer->Width;
-	 }
-      }
-      else {
-	 /* clear whole buffer */
-	 if (ctx->Accum.ClearColor[0]==0.0 &&
-	     ctx->Accum.ClearColor[1]==0.0 &&
-	     ctx->Accum.ClearColor[2]==0.0 &&
-	     ctx->Accum.ClearColor[3]==0.0) {
-	    /* Black */
-	    BZERO( ctx->DrawBuffer->Accum, buffersize * 4 * sizeof(GLaccum) );
-	 }
-	 else {
-	    /* Not black */
-	    GLaccum *acc, r, g, b, a;
-	    GLuint i;
-
-	    acc = ctx->DrawBuffer->Accum;
-	    r = (GLaccum) (ctx->Accum.ClearColor[0] * acc_scale);
-	    g = (GLaccum) (ctx->Accum.ClearColor[1] * acc_scale);
-	    b = (GLaccum) (ctx->Accum.ClearColor[2] * acc_scale);
-	    a = (GLaccum) (ctx->Accum.ClearColor[3] * acc_scale);
-	    for (i=0;i<buffersize;i++) {
-	       *acc++ = r;
-	       *acc++ = g;
-	       *acc++ = b;
-	       *acc++ = a;
-	    }
-	 }
-      }
-
-      /* update optimized accum state vars */
-      if (ctx->Accum.ClearColor[0] == 0.0 && ctx->Accum.ClearColor[1] == 0.0 &&
-          ctx->Accum.ClearColor[2] == 0.0 && ctx->Accum.ClearColor[3] == 0.0) {
-#ifdef USE_OPTIMIZED_ACCUM
-         ctx->IntegerAccumMode = GL_TRUE;
-#else
-         ctx->IntegerAccumMode = GL_FALSE;
-#endif
-         ctx->IntegerAccumScaler = 0.0;  /* denotes empty accum buffer */
-      }
-      else {
-         ctx->IntegerAccumMode = GL_FALSE;
-      }
-   }
+   if (!ctx->Driver.Accum ||
+       !ctx->Driver.Accum( ctx, op, value, xpos, ypos, width, height ))
+      _swrast_Accum( ctx, op, value, xpos, ypos, width, height );
 }