From 5f57f2e3467ac8b698e956473a010290cc0a39c8 Mon Sep 17 00:00:00 2001
From: Crayon2000 <crayon1@rocketmail.com>
Date: Mon, 16 Feb 2009 04:38:16 +0000
Subject: [PATCH] [NEW] GRRLIB_BMFX_FlipH and GRRLIB_BMFX_FlipV for flipping a
 texture

---
 GRRLIB/GRRLIB/GRRLIB.c         | 34 ++++++++++++++++++++++++++++++++++
 GRRLIB/GRRLIB/GRRLIB.h         |  2 ++
 examples/lesson2/source/main.c | 30 ++++++++++++++++++++++++++----
 readme.txt                     | 10 ++++++++--
 4 files changed, 70 insertions(+), 6 deletions(-)

diff --git a/GRRLIB/GRRLIB/GRRLIB.c b/GRRLIB/GRRLIB/GRRLIB.c
index 138a9da..c46d9e6 100644
--- a/GRRLIB/GRRLIB/GRRLIB.c
+++ b/GRRLIB/GRRLIB/GRRLIB.c
@@ -551,6 +551,40 @@ void GRRLIB_BMFX_Invert(GRRLIB_texImg texsrc, GRRLIB_texImg texdest) {
     }
 }
 
+/**
+ * Flip texture horizontal.
+ * @see GRRLIB_FlushTex
+ * @param texsrc the texture source.
+ * @param texdest the texture destination.
+ */
+void GRRLIB_BMFX_FlipH(GRRLIB_texImg texsrc, GRRLIB_texImg texdest) {
+    unsigned int x, y, txtWidth = texsrc.w - 1;
+
+    for(y=0; y<texsrc.h; y++) {
+        for(x=0; x<texsrc.w; x++) {
+            GRRLIB_SetPixelTotexImg(txtWidth - x, y, texdest,
+                GRRLIB_GetPixelFromtexImg(x, y, texsrc));
+        }
+    }
+}
+
+/**
+ * Flip texture vertical.
+ * @see GRRLIB_FlushTex
+ * @param texsrc the texture source.
+ * @param texdest the texture destination.
+ */
+void GRRLIB_BMFX_FlipV(GRRLIB_texImg texsrc, GRRLIB_texImg texdest) {
+    unsigned int x, y, texHeight = texsrc.h - 1;
+
+    for(y=0; y<texsrc.h; y++) {
+        for(x=0; x<texsrc.w; x++) {
+            GRRLIB_SetPixelTotexImg(x, texHeight - y, texdest,
+                GRRLIB_GetPixelFromtexImg(x, y, texsrc));
+        }
+    }
+}
+
 /**
  * Blur a texture.
  * @see GRRLIB_FlushTex
diff --git a/GRRLIB/GRRLIB/GRRLIB.h b/GRRLIB/GRRLIB/GRRLIB.h
index 1d81b19..d5d6a68 100644
--- a/GRRLIB/GRRLIB/GRRLIB.h
+++ b/GRRLIB/GRRLIB/GRRLIB.h
@@ -69,6 +69,8 @@ void GRRLIB_FlushTex(GRRLIB_texImg tex);
 
 void GRRLIB_BMFX_Grayscale(GRRLIB_texImg texsrc, GRRLIB_texImg texdest);
 void GRRLIB_BMFX_Invert(GRRLIB_texImg texsrc, GRRLIB_texImg texdest);
+void GRRLIB_BMFX_FlipH(GRRLIB_texImg texsrc, GRRLIB_texImg texdest);
+void GRRLIB_BMFX_FlipV(GRRLIB_texImg texsrc, GRRLIB_texImg texdest);
 void GRRLIB_BMFX_Blur(GRRLIB_texImg texsrc, GRRLIB_texImg texdest, int factor);
 void GRRLIB_BMFX_Scatter(GRRLIB_texImg texsrc, GRRLIB_texImg texdest, int factor);
 void GRRLIB_BMFX_Pixelate(GRRLIB_texImg texsrc, GRRLIB_texImg texdest, int factor);
diff --git a/examples/lesson2/source/main.c b/examples/lesson2/source/main.c
index 44e60ef..a9ce346 100644
--- a/examples/lesson2/source/main.c
+++ b/examples/lesson2/source/main.c
@@ -48,6 +48,9 @@ int main() {
     GRRLIB_texImg tex_scatter4 = GRRLIB_CreateEmptyTexture(tex_pirate.w, tex_pirate.h);
     GRRLIB_texImg tex_scatter5 = GRRLIB_CreateEmptyTexture(tex_pirate.w, tex_pirate.h);
     GRRLIB_texImg tex_scatter6 = GRRLIB_CreateEmptyTexture(tex_pirate.w, tex_pirate.h);
+    GRRLIB_texImg tex_fliph = GRRLIB_CreateEmptyTexture(tex_pirate.w, tex_pirate.h);
+    GRRLIB_texImg tex_flipv = GRRLIB_CreateEmptyTexture(tex_pirate.w, tex_pirate.h);
+    GRRLIB_texImg tex_fliphv = GRRLIB_CreateEmptyTexture(tex_pirate.w, tex_pirate.h);
 
     // Let's precalculte the grayscale texture
     GRRLIB_BMFX_Grayscale(tex_pirate, tex_gray);
@@ -99,6 +102,14 @@ int main() {
     GRRLIB_BMFX_Scatter(tex_pirate, tex_scatter6, 12);
     GRRLIB_FlushTex(tex_pixel6);
 
+    // Let's precalculte for flipping the texture
+    GRRLIB_BMFX_FlipH(tex_pirate, tex_fliph);
+    GRRLIB_FlushTex(tex_fliph);
+    GRRLIB_BMFX_FlipV(tex_pirate, tex_flipv);
+    GRRLIB_FlushTex(tex_flipv);
+    GRRLIB_BMFX_FlipV(tex_fliph, tex_fliphv);
+    GRRLIB_FlushTex(tex_fliphv);
+
     GRRLIB_Init();
     WPAD_Init();
 
@@ -123,6 +134,14 @@ int main() {
                 GRRLIB_DrawImg(10+tex_pirate.w*1, 60, tex_invert, 0, 1, 1, 0xFFFFFFFF);
                 break;
             case 3:
+                GRRLIB_Printf(10, 10, text_font1, 0X000000FF, 1, "FLIPH AND FLIPV FX");
+
+                GRRLIB_DrawImg(10, 60, tex_pirate, 0, 1, 1, 0xFFFFFFFF);
+                GRRLIB_DrawImg(10+tex_pirate.w*1, 60, tex_fliph, 0, 1, 1, 0xFFFFFFFF);
+                GRRLIB_DrawImg(10+tex_pirate.w*2, 60, tex_flipv, 0, 1, 1, 0xFFFFFFFF);
+                GRRLIB_DrawImg(10+tex_pirate.w*3, 60, tex_fliphv, 0, 1, 1, 0xFFFFFFFF);
+                break;
+            case 4:
                 GRRLIB_Printf(10, 10, text_font1, 0X000000FF, 1, "BLUR FX");
 
                 GRRLIB_DrawImg(10, 60, tex_pirate, 0, 1, 1, 0xFFFFFFFF);
@@ -133,7 +152,7 @@ int main() {
                 GRRLIB_DrawImg(10+tex_pirate.w*1, 60+tex_pirate.h*1, tex_blur5, 0, 1, 1, 0xFFFFFFFF);
                 GRRLIB_DrawImg(10+tex_pirate.w*2, 60+tex_pirate.h*1, tex_blur6, 0, 1, 1, 0xFFFFFFFF);
                 break;
-            case 4:
+            case 5:
                 GRRLIB_Printf(10, 10, text_font1, 0X000000FF, 1, "PIXELATE FX");
 
                 GRRLIB_DrawImg(10, 60, tex_pirate, 0, 1, 1, 0xFFFFFFFF);
@@ -144,7 +163,7 @@ int main() {
                 GRRLIB_DrawImg(10+tex_pirate.w*1, 60+tex_pirate.h*1, tex_pixel5, 0, 1, 1, 0xFFFFFFFF);
                 GRRLIB_DrawImg(10+tex_pirate.w*2, 60+tex_pirate.h*1, tex_pixel6, 0, 1, 1, 0xFFFFFFFF);
                 break;
-            case 5:
+            case 6:
                 GRRLIB_Printf(10, 10, text_font1, 0X000000FF, 1, "SCATTER FX");
 
                 GRRLIB_DrawImg(10, 60, tex_pirate, 0, 1, 1, 0xFFFFFFFF);
@@ -170,17 +189,20 @@ int main() {
         }
         if(wpaddown & WPAD_BUTTON_MINUS) {
             page--;
-            if(page < 0) page = 5;
+            if(page < 0) page = 6;
         }
         if(wpaddown & WPAD_BUTTON_PLUS) {
             page++;
-            if(page > 5) page = 0;
+            if(page > 6) page = 0;
         }
     }
     GRRLIB_Exit(); // Be a good boy, clear the memory allocated by GRRLIB
     free(tex_pirate.data);
     free(tex_gray.data);
     free(tex_invert.data);
+    free(tex_fliph.data);
+    free(tex_flipv.data);
+    free(tex_fliphv.data);
     free(tex_blur1.data);
     free(tex_blur2.data);
     free(tex_blur3.data);
diff --git a/readme.txt b/readme.txt
index 1950aec..0b7c6b9 100644
--- a/readme.txt
+++ b/readme.txt
@@ -56,7 +56,14 @@ ChangeLog :
 
 * GRRLIB_CreateEmptyTexture and GRRLIB_FlushTex
 
-* New Bitmap FX: GRRLIB_BMFX_Grayscale, GRRLIB_BMFX_Invert,  GRRLIB_BMFX_Scatter, GRRLIB_BMFX_Blur, GRRLIB_BMFX_Pixelate
+* New Bitmap FX:
+    - GRRLIB_BMFX_Grayscale
+    - GRRLIB_BMFX_Invert
+    - GRRLIB_BMFX_FlipH
+    - GRRLIB_BMFX_FlipV
+    - GRRLIB_BMFX_Scatter
+    - GRRLIB_BMFX_Blur
+    - GRRLIB_BMFX_Pixelate
 
 * add GRRLIB_Exit to free the memory allocated by GRRLIB
 
@@ -69,4 +76,3 @@ Contact me to provide me all your patch/addon/new functions...
 
 NoNameNo.
 
-