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8bit sdl surfaces

 
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crazyc



Joined: 17 Jun 2005
Posts: 410
PostPosted: Sat Aug 27, 2005 7:07 am    Post subject: 8bit sdl surfaces Reply with quote
Here's a patch to add support for 8bit software surfaces in SDL.

Code:
--- SDL_pspvideo.c.orig   Fri Aug 26 15:58:10 2005
+++ SDL_pspvideo.c   Fri Aug 26 15:54:56 2005
@@ -35,6 +35,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <malloc.h>
 
 #include "SDL.h"
 #include "SDL_error.h"
@@ -205,7 +206,13 @@
         sceGuInit();
         sceGuStart(GU_DIRECT, list);
         sceGuDispBuffer(SCREEN_WIDTH, SCREEN_HEIGHT, (void*)0, PSP_LINE_SIZE);
-        sceGuDrawBuffer(gu_format, (void*)0, PSP_LINE_SIZE);
+      if(gu_format == GU_PSM_T8)
+      {
+         sceGuDrawBuffer(GU_PSM_8888, (void*)0, PSP_LINE_SIZE);
+         sceGuClutMode(GU_PSM_8888, 0, 255, 0);
+      }
+      else
+           sceGuDrawBuffer(gu_format, (void*)0, PSP_LINE_SIZE);
         sceGuClear(GU_COLOR_BUFFER_BIT | GU_DEPTH_BUFFER_BIT);
         sceGuDepthBuffer((void*) 0x110000, PSP_LINE_SIZE);
         sceGuOffset(2048 - (SCREEN_WIDTH / 2), 2048 - (SCREEN_HEIGHT / 2));
@@ -236,6 +243,13 @@
         }
 
         switch(bpp) {
+      case 8:
+            Amask = 0;
+            Rmask = 0;
+            Gmask = 0;
+            Bmask = 0;
+            pixel_format = PSP_DISPLAY_PIXEL_FORMAT_8888;
+            gu_format = GU_PSM_T8;
         case 15: /* 5-5-5-1 */
                 pitch = 512 * 2;
                 Amask = 0x00008000;
@@ -301,6 +315,8 @@
 
                 this->hidden->gu_format = gu_format;
                 this->UpdateRects = PSP_GuUpdateRects;
+            if(bpp == 8 && !this->hidden->gu_palette)
+               this->hidden->gu_palette = memalign(16, 4 * 256);
     }
 
         this->hidden->pixel_format = pixel_format;
@@ -448,8 +464,20 @@
 
 int PSP_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
 {
-        /* do nothing of note. */
-        return(1);
+   int i, j;
+   unsigned int *palette = this->hidden->gu_palette;
+
+   if (this->hidden->gu_format != GU_PSM_T8) return 0;
+   
+   for (i=firstcolor, j=0; j < ncolors; i++, j++)
+      palette[i] = (colors[j].b << 16) | (colors[j].g << 8) | (colors[j].r);
+      
+   sceKernelDcacheWritebackAll();
+   sceGuStart(GU_DIRECT, list);
+   sceGuClutLoad(32, this->hidden->gu_palette);
+   sceGuFinish();
+   
+   return 1;
 }
 
 /* Note:  If we are terminated, this could be called in the middle of


Also "unsigned int *gu_palette" should be added to the SDL_PrivateVideoData struct
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stefan



Joined: 14 Nov 2004
Posts: 10
PostPosted: Sat Aug 27, 2005 10:42 am    Post subject: Reply with quote
Applied with minor changes. Untested.
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vtrucco



Joined: 05 Aug 2005
Posts: 1
PostPosted: Tue Aug 30, 2005 10:51 am    Post subject: Reply with quote
Doesn't work for me. I tested with /SDL/test/testsprite.c

"8-bit surfaces are only supported on software surfaces."
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urchin



Joined: 02 Jun 2005
Posts: 121
PostPosted: Thu Oct 27, 2005 6:57 am    Post subject: Reply with quote
If you specify double buffering when setting the video mode to 8bit, it will be forced into hardware surface mode and fail.
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