Fix typo

[mesa.git] / src / mesa / swrast / s_accum.c

diff --git a/src/mesa/swrast/s_accum.c b/src/mesa/swrast/s_accum.c
index ff12c5305032259a2b2c3ad8200070272e2d148b..d7f7dd9e0da9f93c2dff1c815d9a4ba5b4dd5745 100644 (file)
--- a/src/mesa/swrast/s_accum.c
+++ b/src/mesa/swrast/s_accum.c
@@ -1,10 +1,10 @@
-/* $Id: s_accum.c,v 1.2 2000/11/05 18:24:40 keithw Exp $ */
+/* $Id: s_accum.c,v 1.5 2001/03/03 20:33:30 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
  * Version:  3.5
  * 
- * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2001  Brian Paul   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"),
@@ -30,6 +30,7 @@
 #include "mem.h"
 
 #include "s_accum.h"
+#include "s_alphabuf.h"
 #include "s_context.h"
 #include "s_masking.h"
 #include "s_span.h"
@@ -68,6 +69,7 @@
 void
 _mesa_alloc_accum_buffer( GLcontext *ctx )
 {
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
    GLint n;
 
    if (ctx->DrawBuffer->Accum) {
@@ -80,14 +82,14 @@ _mesa_alloc_accum_buffer( GLcontext *ctx )
    ctx->DrawBuffer->Accum = (GLaccum *) MALLOC( n );
    if (!ctx->DrawBuffer->Accum) {
       /* unable to setup accumulation buffer */
-      gl_error( ctx, GL_OUT_OF_MEMORY, "glAccum" );
+      _mesa_error( ctx, GL_OUT_OF_MEMORY, "glAccum" );
    }
 #ifdef USE_OPTIMIZED_ACCUM
-   ctx->IntegerAccumMode = GL_TRUE;
+   swrast->_IntegerAccumMode = GL_TRUE;
 #else
-   ctx->IntegerAccumMode = GL_FALSE;
+   swrast->_IntegerAccumMode = GL_FALSE;
 #endif
-   ctx->IntegerAccumScaler = 0.0;
+   swrast->_IntegerAccumScaler = 0.0;
 }
 
 
@@ -102,20 +104,21 @@ _mesa_alloc_accum_buffer( GLcontext *ctx )
  */
 static void rescale_accum( GLcontext *ctx )
 {
+   SWcontext *swrast = SWRAST_CONTEXT(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);
+   const GLfloat s = swrast->_IntegerAccumScaler * (32767.0 / fChanMax);
    GLaccum *accum = ctx->DrawBuffer->Accum;
    GLuint i;
 
-   assert(ctx->IntegerAccumMode);
+   assert(swrast->_IntegerAccumMode);
    assert(accum);
 
    for (i = 0; i < n; i++) {
       accum[i] = (GLaccum) (accum[i] * s);
    }
 
-   ctx->IntegerAccumMode = GL_FALSE;
+   swrast->_IntegerAccumMode = GL_FALSE;
 }
 
 
@@ -129,10 +132,11 @@ static void rescale_accum( GLcontext *ctx )
 void
 _mesa_clear_accum_buffer( GLcontext *ctx )
 {
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
    GLuint buffersize;
    GLfloat acc_scale;
 
-   if (ctx->Visual.AccumRedBits==0) {
+   if (ctx->Visual.accumRedBits==0) {
       /* No accumulation buffer! */
       return;
    }
@@ -169,12 +173,12 @@ _mesa_clear_accum_buffer( GLcontext *ctx )
         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;
+         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);
+               + 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;
@@ -217,14 +221,14 @@ _mesa_clear_accum_buffer( GLcontext *ctx )
       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;
+         swrast->_IntegerAccumMode = GL_TRUE;
 #else
-         ctx->IntegerAccumMode = GL_FALSE;
+         swrast->_IntegerAccumMode = GL_FALSE;
 #endif
-         ctx->IntegerAccumScaler = 0.0;  /* denotes empty accum buffer */
+         swrast->_IntegerAccumScaler = 0.0;  /* denotes empty accum buffer */
       }
       else {
-         ctx->IntegerAccumMode = GL_FALSE;
+         swrast->_IntegerAccumMode = GL_FALSE;
       }
    }
 }
@@ -236,6 +240,7 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
               GLint width, GLint height )
 
 {
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
    GLuint width4;
    GLfloat acc_scale;
    GLchan rgba[MAX_WIDTH][4];
@@ -273,7 +278,7 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
            const GLaccum intVal = (GLaccum) (value * acc_scale);
            GLuint j;
             /* Leave optimized accum buffer mode */
-            if (ctx->IntegerAccumMode)
+            if (swrast->_IntegerAccumMode)
                rescale_accum(ctx);
            for (j = 0; j < height; j++) {
               GLaccum * acc = ctx->DrawBuffer->Accum + ypos * width4 + 4 * xpos;
@@ -290,7 +295,7 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
          if (value != 1.0F) {
            GLuint j;
             /* Leave optimized accum buffer mode */
-            if (ctx->IntegerAccumMode)
+            if (swrast->_IntegerAccumMode)
                rescale_accum(ctx);
            for (j = 0; j < height; j++) {
               GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + 4 * xpos;
@@ -311,23 +316,23 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
                                        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)
+         if (swrast->_IntegerAccumScaler == 0.0 && value > 0.0 && value <= 1.0)
+            swrast->_IntegerAccumScaler = value;
+         if (swrast->_IntegerAccumMode && value != swrast->_IntegerAccumScaler)
             rescale_accum(ctx);
             
          RENDER_START(ctx);
 
-         if (ctx->IntegerAccumMode) {
+         if (swrast->_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);
+            assert(swrast->_IntegerAccumScaler > 0.0);
+            assert(swrast->_IntegerAccumScaler <= 1.0);
             for (j = 0; j < height; j++) {
                
                GLuint i, i4;
-               gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
+               _mesa_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];
@@ -348,7 +353,7 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
             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);
+               _mesa_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++;
@@ -371,27 +376,27 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
          /* 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;
+            swrast->_IntegerAccumMode = GL_TRUE;
 #else
-            ctx->IntegerAccumMode = GL_FALSE;
+            swrast->_IntegerAccumMode = GL_FALSE;
 #endif
-            ctx->IntegerAccumScaler = value;
+            swrast->_IntegerAccumScaler = value;
          }
          else {
-            ctx->IntegerAccumMode = GL_FALSE;
-            ctx->IntegerAccumScaler = 0.0;
+            swrast->_IntegerAccumMode = GL_FALSE;
+            swrast->_IntegerAccumScaler = 0.0;
          }
 
          RENDER_START(ctx);
-         if (ctx->IntegerAccumMode) {
+         if (swrast->_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);
+            assert(swrast->_IntegerAccumScaler > 0.0);
+            assert(swrast->_IntegerAccumScaler <= 1.0);
             for (j = 0; j < height; j++) {
                GLuint i, i4;
-               gl_read_rgba_span(ctx, ctx->DrawBuffer, width, xpos, ypos, rgba);
+               _mesa_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];
@@ -412,7 +417,7 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
             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);
+               _mesa_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);
@@ -431,15 +436,15 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
 
       case GL_RETURN:
          /* May have to leave optimized accum buffer mode */
-         if (ctx->IntegerAccumMode && value != 1.0)
+         if (swrast->_IntegerAccumMode && value != 1.0)
             rescale_accum(ctx);
 
          RENDER_START(ctx);
-         if (ctx->IntegerAccumMode && ctx->IntegerAccumScaler > 0) {
+         if (swrast->_IntegerAccumMode && swrast->_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 GLfloat mult = swrast->_IntegerAccumScaler;
             const GLint max = MIN2((GLint) (256 / mult), 32767);
             GLuint j;
             if (mult != prevMult) {
@@ -448,8 +453,8 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
                prevMult = mult;
             }
 
-            assert(ctx->IntegerAccumScaler > 0.0);
-            assert(ctx->IntegerAccumScaler <= 1.0);
+            assert(swrast->_IntegerAccumScaler > 0.0);
+            assert(swrast->_IntegerAccumScaler <= 1.0);
             for (j = 0; j < height; j++) {
                const GLaccum *acc = ctx->DrawBuffer->Accum + ypos * width4 + xpos*4;
                GLuint i, i4;
@@ -468,6 +473,11 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
                }
                (*ctx->Driver.WriteRGBASpan)( ctx, width, xpos, ypos, 
                                              (const GLchan (*)[4])rgba, NULL );
+               if (ctx->DrawBuffer->UseSoftwareAlphaBuffers
+                   && ctx->Color.ColorMask[ACOMP]) {
+                  _mesa_write_alpha_span(ctx, width, xpos, ypos,
+                                         (CONST GLubyte (*)[4]) rgba, NULL);
+               }
                ypos++;
             }
          }
@@ -495,6 +505,11 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
                }
                (*ctx->Driver.WriteRGBASpan)( ctx, width, xpos, ypos, 
                                              (const GLchan (*)[4])rgba, NULL );
+               if (ctx->DrawBuffer->UseSoftwareAlphaBuffers
+                   && ctx->Color.ColorMask[ACOMP]) {
+                  _mesa_write_alpha_span(ctx, width, xpos, ypos,
+                                         (CONST GLubyte (*)[4]) rgba, NULL);
+               }
                ypos++;
             }
         }
@@ -502,6 +517,6 @@ _swrast_Accum( GLcontext *ctx, GLenum op, GLfloat value,
         break;
 
       default:
-         gl_error( ctx, GL_INVALID_ENUM, "glAccum" );
+         _mesa_error( ctx, GL_INVALID_ENUM, "glAccum" );
    }
 }