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fix zoom/clipping bug 689964

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This commit is contained in:
Brian Paul
2003-02-21 00:17:58 +00:00
parent 19b3b0a0ff
commit ea20dfa7a8
1 changed files with 6 additions and 1 deletions
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src/mesa/swrast/s_zoom.c
+6 -1
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@@ -1,4 +1,4 @@
/* $Id: s_zoom.c,v 1.20 2003/02/17 15:41:05 brianp Exp $ */
/* $Id: s_zoom.c,v 1.21 2003/02/21 00:17:58 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -220,12 +220,15 @@ zoom_span( GLcontext *ctx, const struct sw_span *span,
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 _mesa_write_zoomed_span() more than once.
* Also, clipping may change the span end value, so store it as well.
*/
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++) {
_mesa_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));
@@ -233,11 +236,13 @@ zoom_span( GLcontext *ctx, const struct sw_span *span,
}
}
else if (format == GL_COLOR_INDEX) {
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++) {
_mesa_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));