From 65272c421b7ddc2fe51bad7cc53ae62f3dd3cdf7 Mon Sep 17 00:00:00 2001
From: twinaphex
Date: Fri, 12 Dec 2014 01:17:36 +0100
Subject: And another one pt. 5

---
 video.c | 128 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 126 insertions(+), 2 deletions(-)

(limited to 'video.c')

diff --git a/video.c b/video.c
index 888d11b..35b2054 100644
--- a/video.c
+++ b/video.c
@@ -2145,7 +2145,69 @@ static void render_scanline_text_base_alpha(u32 layer,
       */
 
      /* Render a single scanline of text tiles */
-     tile_render(8bpp, base, alpha);
+     u32 vertical_pixel_offset = (vertical_offset % 8) *
+        tile_width_8bpp;
+     u32 vertical_pixel_flip =
+        ((tile_size_8bpp - tile_width_8bpp) -
+         vertical_pixel_offset) - vertical_pixel_offset;
+     tile_extra_variables_8bpp();
+     u8 *tile_base = vram + (((bg_control >> 2) & 0x03) * (1024 * 16)) +
+        vertical_pixel_offset;
+     u32 pixel_run = 256 - (horizontal_offset % 256);
+     u32 current_tile;
+
+     map_base += ((vertical_offset % 256) / 8) * 32;
+     partial_tile_offset = (horizontal_offset % 8);
+
+     if(pixel_run >= end)
+     {
+        if(partial_tile_offset)
+        {
+           partial_tile_run = 8 - partial_tile_offset;
+           if(end < partial_tile_run)
+           {
+              partial_tile_run = end;
+              partial_tile_mid_map(base, 8bpp, alpha);
+              return;
+           }
+           else
+           {
+              end -= partial_tile_run;
+              partial_tile_right_map(base, 8bpp, alpha);
+           }
+        }
+
+        tile_run = end / 8;
+        multiple_tile_map(base, 8bpp, alpha);
+
+        partial_tile_run = end % 8;
+
+        if(partial_tile_run)
+        {
+           partial_tile_left_map(base, 8bpp, alpha);
+        }
+     }
+     else
+     {
+        if(partial_tile_offset)
+        {
+           partial_tile_run = 8 - partial_tile_offset;
+           partial_tile_right_map(base, 8bpp, alpha);
+        }
+
+        tile_run = (pixel_run - partial_tile_run) / 8;
+        multiple_tile_map(base, 8bpp, alpha);
+        map_ptr = second_ptr;
+        end -= pixel_run;
+        tile_run = end / 8;
+        multiple_tile_map(base, 8bpp, alpha);
+
+        partial_tile_run = end % 8;
+        if(partial_tile_run)
+        {
+           partial_tile_left_map(base, 8bpp, alpha);
+        }
+     }
   }
   else
   {
@@ -2155,7 +2217,69 @@ static void render_scanline_text_base_alpha(u32 layer,
       */
 
      /* Render a single scanline of text tiles */
-     tile_render(4bpp, base, alpha);
+     u32 vertical_pixel_offset = (vertical_offset % 8) *
+        tile_width_4bpp;
+     u32 vertical_pixel_flip =
+        ((tile_size_4bpp - tile_width_4bpp) -
+         vertical_pixel_offset) - vertical_pixel_offset;
+     tile_extra_variables_4bpp();
+     u8 *tile_base = vram + (((bg_control >> 2) & 0x03) * (1024 * 16)) +
+        vertical_pixel_offset;
+     u32 pixel_run = 256 - (horizontal_offset % 256);
+     u32 current_tile;
+
+     map_base += ((vertical_offset % 256) / 8) * 32;
+     partial_tile_offset = (horizontal_offset % 8);
+
+     if(pixel_run >= end)
+     {
+        if(partial_tile_offset)
+        {
+           partial_tile_run = 8 - partial_tile_offset;
+           if(end < partial_tile_run)
+           {
+              partial_tile_run = end;
+              partial_tile_mid_map(base, 4bpp, alpha);
+              return;
+           }
+           else
+           {
+              end -= partial_tile_run;
+              partial_tile_right_map(base, 4bpp, alpha);
+           }
+        }
+
+        tile_run = end / 8;
+        multiple_tile_map(base, 4bpp, alpha);
+
+        partial_tile_run = end % 8;
+
+        if(partial_tile_run)
+        {
+           partial_tile_left_map(base, 4bpp, alpha);
+        }
+     }
+     else
+     {
+        if(partial_tile_offset)
+        {
+           partial_tile_run = 8 - partial_tile_offset;
+           partial_tile_right_map(base, 4bpp, alpha);
+        }
+
+        tile_run = (pixel_run - partial_tile_run) / 8;
+        multiple_tile_map(base, 4bpp, alpha);
+        map_ptr = second_ptr;
+        end -= pixel_run;
+        tile_run = end / 8;
+        multiple_tile_map(base, 4bpp, alpha);
+
+        partial_tile_run = end % 8;
+        if(partial_tile_run)
+        {
+           partial_tile_left_map(base, 4bpp, alpha);
+        }
+     }
   }
 }
 
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