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Re: [PATCH] hw/display/sm501: Implement more 2D raster operations


From: Daniel Henrique Barboza
Subject: Re: [PATCH] hw/display/sm501: Implement more 2D raster operations
Date: Fri, 24 Feb 2023 13:55:48 -0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.8.0



On 2/16/23 11:40, BALATON Zoltan wrote:
Add simple implementation for two raster operations that are used by
AmigaOS which fixes graphics problems in some progtams using these.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>


And queued in ppc-next. Thanks,


Daniel

For definitions of these see:
https://learn.microsoft.com/en-us/windows/win32/gdi/ternary-raster-operations

  hw/display/sm501.c | 30 +++++++++++++++++++++++++++++-
  1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/hw/display/sm501.c b/hw/display/sm501.c
index e1d0591d36..58bc9701ee 100644
--- a/hw/display/sm501.c
+++ b/hw/display/sm501.c
@@ -753,7 +753,7 @@ static void sm501_2d_operation(SM501State *s)
          }
if ((rop_mode && rop == 0x5) || (!rop_mode && rop == 0x55)) {
-            /* Invert dest, is there a way to do this with pixman? */
+            /* DSTINVERT, is there a way to do this with pixman? */
              unsigned int x, y, i;
              uint8_t *d = s->local_mem + dst_base;
@@ -763,6 +763,34 @@ static void sm501_2d_operation(SM501State *s)
                      stn_he_p(&d[i], bypp, ~ldn_he_p(&d[i], bypp));
                  }
              }
+        } else if (!rop_mode && rop == 0x99) {
+            /* DSxn, is there a way to do this with pixman? */
+            unsigned int x, y, i, j;
+            uint8_t *sp = s->local_mem + src_base;
+            uint8_t *d = s->local_mem + dst_base;
+
+            for (y = 0; y < height; y++) {
+                i = (dst_x + (dst_y + y) * dst_pitch) * bypp;
+                j = (src_x + (src_y + y) * src_pitch) * bypp;
+                for (x = 0; x < width; x++, i += bypp, j += bypp) {
+                    stn_he_p(&d[i], bypp,
+                             ~(ldn_he_p(&sp[j], bypp) ^ ldn_he_p(&d[i], 
bypp)));
+                }
+            }
+        } else if (!rop_mode && rop == 0xee) {
+            /* SRCPAINT, is there a way to do this with pixman? */
+            unsigned int x, y, i, j;
+            uint8_t *sp = s->local_mem + src_base;
+            uint8_t *d = s->local_mem + dst_base;
+
+            for (y = 0; y < height; y++) {
+                i = (dst_x + (dst_y + y) * dst_pitch) * bypp;
+                j = (src_x + (src_y + y) * src_pitch) * bypp;
+                for (x = 0; x < width; x++, i += bypp, j += bypp) {
+                    stn_he_p(&d[i], bypp,
+                             ldn_he_p(&sp[j], bypp) | ldn_he_p(&d[i], bypp));
+                }
+            }
          } else {
              /* Do copy src for unimplemented ops, better than unpainted area 
*/
              if ((rop_mode && (rop != 0xc || rop2_source_is_pattern)) ||



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