Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 428 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c
new file mode 100644
index 000000000..b67a29701
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_zoom.c
@@ -0,0 +1,428 @@
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  5.1
+ *
+ * Copyright (C) 1999-2003  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"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL 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 "glheader.h"
+#include "macros.h"
+#include "imports.h"
+#include "colormac.h"
+
+#include "s_context.h"
+#include "s_span.h"
+#include "s_stencil.h"
+#include "s_zoom.h"
+
+
+/*
+ * Helper function called from _swrast_write_zoomed_rgba/rgb/index_span().
+ */
+static void
+zoom_span( GLcontext *ctx, const struct sw_span *span,
+           const GLvoid *src, GLint y0, GLenum format, GLint skipPixels )
+{
+   GLint r0, r1, row;
+   GLint c0, c1, skipCol;
+   GLint i, j;
+   const GLuint maxWidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
+   struct sw_span zoomed;
+   struct span_arrays zoomed_arrays;  /* this is big! */
+
+   /* no pixel arrays! must be horizontal spans. */
+   ASSERT((span->arrayMask & SPAN_XY) == 0);
+   ASSERT(span->primitive == GL_BITMAP);
+
+   INIT_SPAN(zoomed, GL_BITMAP, 0, 0, 0);
+   zoomed.array = &zoomed_arrays;
+
+   /* copy fog interp info */
+   zoomed.fog = span->fog;
+   zoomed.fogStep = span->fogStep;
+   /* XXX copy texcoord info? */
+
+   if (format == GL_RGBA || format == GL_RGB) {
+      /* copy Z info */
+      zoomed.z = span->z;
+      zoomed.zStep = span->zStep;
+      /* we'll generate an array of colorss */
+      zoomed.interpMask = span->interpMask & ~SPAN_RGBA;
+      zoomed.arrayMask |= SPAN_RGBA;
+   }
+   else if (format == GL_COLOR_INDEX) {
+      /* copy Z info */
+      zoomed.z = span->z;
+      zoomed.zStep = span->zStep;
+      /* we'll generate an array of color indexes */
+      zoomed.interpMask = span->interpMask & ~SPAN_INDEX;
+      zoomed.arrayMask |= SPAN_INDEX;
+   }
+   else {
+      assert(format == GL_DEPTH_COMPONENT);
+      /* Copy color info */
+      zoomed.red = span->red;
+      zoomed.green = span->green;
+      zoomed.blue = span->blue;
+      zoomed.alpha = span->alpha;
+      zoomed.redStep = span->redStep;
+      zoomed.greenStep = span->greenStep;
+      zoomed.blueStep = span->blueStep;
+      zoomed.alphaStep = span->alphaStep;
+      /* we'll generate an array of depth values */
+      zoomed.interpMask = span->interpMask & ~SPAN_Z;
+      zoomed.arrayMask |= SPAN_Z;
+   }
+
+   /*
+    * Compute which columns to draw: [c0, c1)
+    */
+   c0 = (GLint) (span->x + skipPixels * ctx->Pixel.ZoomX);
+   c1 = (GLint) (span->x + (skipPixels + span->end) * ctx->Pixel.ZoomX);
+   if (c0 == c1) {
+      return;
+   }
+   else if (c1 < c0) {
+      /* swap */
+      GLint ctmp = c1;
+      c1 = c0;
+      c0 = ctmp;
+   }
+   if (c0 < 0) {
+      zoomed.x = 0;
+      zoomed.start = 0;
+      zoomed.end = c1;
+      skipCol = -c0;
+   }
+   else {
+      zoomed.x = c0;
+      zoomed.start = 0;
+      zoomed.end = c1 - c0;
+      skipCol = 0;
+   }
+   if (zoomed.end > maxWidth)
+      zoomed.end = maxWidth;
+
+   /*
+    * Compute which rows to draw: [r0, r1)
+    */
+   row = span->y - y0;
+   r0 = y0 + (GLint) (row * ctx->Pixel.ZoomY);
+   r1 = y0 + (GLint) ((row+1) * ctx->Pixel.ZoomY);
+   if (r0 == r1) {
+      return;
+   }
+   else if (r1 < r0) {
+      /* swap */
+      GLint rtmp = r1;
+      r1 = r0;
+      r0 = rtmp;
+   }
+
+   ASSERT(r0 < r1);
+   ASSERT(c0 < c1);
+
+   /*
+    * Trivial clip rejection testing.
+    */
+   if (r1 < 0) /* below window */
+      return;
+   if (r0 >= (GLint) ctx->DrawBuffer->Height) /* above window */
+      return;
+   if (c1 < 0) /* left of window */
+      return;
+   if (c0 >= (GLint) ctx->DrawBuffer->Width) /* right of window */
+      return;
+
+   /* zoom the span horizontally */
+   if (format == GL_RGBA) {
+      const GLchan (*rgba)[4] = (const GLchan (*)[4]) src;
+      if (ctx->Pixel.ZoomX == -1.0F) {
+         /* common case */
+         for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+            i = span->end - (j + skipCol) - 1;
+            COPY_CHAN4(zoomed.array->rgba[j], rgba[i]);
+         }
+      }
+      else {
+         /* general solution */
+         const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+         for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+            i = (GLint) ((j + skipCol) * xscale);
+            if (ctx->Pixel.ZoomX < 0.0) {
+               ASSERT(i <= 0);
+               i = span->end + i - 1;
+            }
+            ASSERT(i >= 0);
+            ASSERT(i < (GLint)  span->end);
+            COPY_CHAN4(zoomed.array->rgba[j], rgba[i]);
+         }
+      }
+   }
+   else if (format == GL_RGB) {
+      const GLchan (*rgb)[3] = (const GLchan (*)[3]) src;
+      if (ctx->Pixel.ZoomX == -1.0F) {
+         /* common case */
+         for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+            i = span->end - (j + skipCol) - 1;
+            zoomed.array->rgba[j][0] = rgb[i][0];
+            zoomed.array->rgba[j][1] = rgb[i][1];
+            zoomed.array->rgba[j][2] = rgb[i][2];
+            zoomed.array->rgba[j][3] = CHAN_MAX;
+         }
+      }
+      else {
+         /* general solution */
+         const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+         for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+            i = (GLint) ((j + skipCol) * xscale);
+            if (ctx->Pixel.ZoomX < 0.0) {
+               ASSERT(i <= 0);
+               i = span->end + i - 1;
+            }
+            ASSERT(i >= 0);
+            ASSERT(i < (GLint) span->end);
+            zoomed.array->rgba[j][0] = rgb[i][0];
+            zoomed.array->rgba[j][1] = rgb[i][1];
+            zoomed.array->rgba[j][2] = rgb[i][2];
+            zoomed.array->rgba[j][3] = CHAN_MAX;
+         }
+      }
+   }
+   else if (format == GL_COLOR_INDEX) {
+      const GLuint *indexes = (const GLuint *) src;
+      if (ctx->Pixel.ZoomX == -1.0F) {
+         /* common case */
+         for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+            i = span->end - (j + skipCol) - 1;
+            zoomed.array->index[j] = indexes[i];
+         }
+      }
+      else {
+         /* general solution */
+         const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+         for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+            i = (GLint) ((j + skipCol) * xscale);
+            if (ctx->Pixel.ZoomX < 0.0) {
+               ASSERT(i <= 0);
+               i = span->end + i - 1;
+            }
+            ASSERT(i >= 0);
+            ASSERT(i < (GLint) span->end);
+            zoomed.array->index[j] = indexes[i];
+         }
+      }
+   }
+   else {
+      const GLdepth *zValues = (const GLuint *) src;
+      assert(format == GL_DEPTH_COMPONENT);
+      if (ctx->Pixel.ZoomX == -1.0F) {
+         /* common case */
+         for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+            i = span->end - (j + skipCol) - 1;
+            zoomed.array->z[j] = zValues[i];
+         }
+      }
+      else {
+         /* general solution */
+         const GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+         for (j = (GLint) zoomed.start; j < (GLint) zoomed.end; j++) {
+            i = (GLint) ((j + skipCol) * xscale);
+            if (ctx->Pixel.ZoomX < 0.0) {
+               ASSERT(i <= 0);
+               i = span->end + i - 1;
+            }
+            ASSERT(i >= 0);
+            ASSERT(i < (GLint) span->end);
+            zoomed.array->z[j] = zValues[i];
+         }
+      }
+      /* Now, fall into either the RGB or COLOR_INDEX path below */
+      if (ctx->Visual.rgbMode)
+         format = GL_RGBA;
+      else
+         format = GL_COLOR_INDEX;
+   }
+
+
+   /* write the span in rows [r0, r1) */
+   if (format == GL_RGBA || format == GL_RGB) {
+      /* Writing the span may modify the colors, so make a backup now if we're
+       * going to call _swrast_write_zoomed_span() more than once.
+       * Also, clipping may change the span end value, so store it as well.
+       */
+      GLchan rgbaSave[MAX_WIDTH][4];
+      const GLint end = zoomed.end; /* save */
+      if (r1 - r0 > 1) {
+         MEMCPY(rgbaSave, zoomed.array->rgba, zoomed.end * 4 * sizeof(GLchan));
+      }
+      for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
+         _swrast_write_rgba_span(ctx, &zoomed);
+         zoomed.end = end;  /* restore */
+         if (r1 - r0 > 1) {
+            /* restore the colors */
+            MEMCPY(zoomed.array->rgba, rgbaSave, zoomed.end*4 * sizeof(GLchan));
+         }
+      }
+   }
+   else if (format == GL_COLOR_INDEX) {
+      GLuint indexSave[MAX_WIDTH];
+      const GLint end = zoomed.end; /* save */
+      if (r1 - r0 > 1) {
+         MEMCPY(indexSave, zoomed.array->index, zoomed.end * sizeof(GLuint));
+      }
+      for (zoomed.y = r0; zoomed.y < r1; zoomed.y++) {
+         _swrast_write_index_span(ctx, &zoomed);
+         zoomed.end = end;  /* restore */
+         if (r1 - r0 > 1) {
+            /* restore the colors */
+            MEMCPY(zoomed.array->index, indexSave, zoomed.end * sizeof(GLuint));
+         }
+      }
+   }
+}
+
+
+void
+_swrast_write_zoomed_rgba_span( GLcontext *ctx, const struct sw_span *span,
+                              CONST GLchan rgba[][4], GLint y0,
+                              GLint skipPixels )
+{
+   zoom_span(ctx, span, (const GLvoid *) rgba, y0, GL_RGBA, skipPixels);
+}
+
+
+void
+_swrast_write_zoomed_rgb_span( GLcontext *ctx, const struct sw_span *span,
+                             CONST GLchan rgb[][3], GLint y0,
+                             GLint skipPixels )
+{
+   zoom_span(ctx, span, (const GLvoid *) rgb, y0, GL_RGB, skipPixels);
+}
+
+
+void
+_swrast_write_zoomed_index_span( GLcontext *ctx, const struct sw_span *span,
+                               GLint y0, GLint skipPixels )
+{
+   zoom_span(ctx, span, (const GLvoid *) span->array->index, y0,
+             GL_COLOR_INDEX, skipPixels);
+}
+
+
+void
+_swrast_write_zoomed_depth_span( GLcontext *ctx, const struct sw_span *span,
+                                 GLint y0, GLint skipPixels )
+{
+   zoom_span(ctx, span, (const GLvoid *) span->array->z, y0,
+             GL_DEPTH_COMPONENT, skipPixels);
+}
+
+
+/*
+ * As above, but write stencil values.
+ */
+void
+_swrast_write_zoomed_stencil_span( GLcontext *ctx,
+                                 GLuint n, GLint x, GLint y,
+                                 const GLstencil stencil[], GLint y0,
+                                 GLint skipPixels )
+{
+   GLint m;
+   GLint r0, r1, row, r;
+   GLint i, j, skipcol;
+   GLstencil zstencil[MAX_WIDTH];  /* zoomed stencil values */
+   GLint maxwidth = MIN2( ctx->DrawBuffer->Width, MAX_WIDTH );
+
+   (void) skipPixels;  /* XXX this shouldn't be ignored */
+
+   /* compute width of output row */
+   m = (GLint) FABSF( n * ctx->Pixel.ZoomX );
+   if (m==0) {
+      return;
+   }
+   if (ctx->Pixel.ZoomX<0.0) {
+      /* adjust x coordinate for left/right mirroring */
+      x = x - m;
+   }
+
+   /* compute which rows to draw */
+   row = y - y0;
+   r0 = y0 + (GLint) (row * ctx->Pixel.ZoomY);
+   r1 = y0 + (GLint) ((row+1) * ctx->Pixel.ZoomY);
+   if (r0==r1) {
+      return;
+   }
+   else if (r1<r0) {
+      GLint rtmp = r1;
+      r1 = r0;
+      r0 = rtmp;
+   }
+
+   /* return early if r0...r1 is above or below window */
+   if (r0<0 && r1<0) {
+      /* below window */
+      return;
+   }
+   if (r0 >= (GLint) ctx->DrawBuffer->Height &&
+       r1 >= (GLint) ctx->DrawBuffer->Height) {
+      /* above window */
+      return;
+   }
+
+   /* check if left edge is outside window */
+   skipcol = 0;
+   if (x<0) {
+      skipcol = -x;
+      m += x;
+   }
+   /* make sure span isn't too long or short */
+   if (m>maxwidth) {
+      m = maxwidth;
+   }
+   else if (m<=0) {
+      return;
+   }
+
+   ASSERT( m <= MAX_WIDTH );
+
+   /* zoom the span horizontally */
+   if (ctx->Pixel.ZoomX==-1.0F) {
+      /* n==m */
+      for (j=0;j<m;j++) {
+         i = n - (j+skipcol) - 1;
+         zstencil[j] = stencil[i];
+      }
+   }
+   else {
+      GLfloat xscale = 1.0F / ctx->Pixel.ZoomX;
+      for (j=0;j<m;j++) {
+         i = (GLint) ((j+skipcol) * xscale);
+         if (i<0)  i = n + i - 1;
+         zstencil[j] = stencil[i];
+      }
+   }
+
+   /* write the span */
+   for (r=r0; r<r1; r++) {
+      _swrast_write_stencil_span( ctx, m, x+skipcol, r, zstencil );
+   }
+}