Improved documentation

CHANGELOG.md

@@ -6,7 +6,7 @@ All notable changes to this project will be documented in this file.
 
 - Fixed compatibility issues with devkitPPC release 39.
 - Added `GRRLIB_LoadTTFFromFile()` to load a TTF from a file.
-- Fixed documentation for `GRRLIB_Camera3dSettings()`.
+- Fixed documentation for `GRRLIB_Camera3dSettings()`, `GRRLIB_Screen2Texture()` and `GRRLIB_CompoEnd()`.
 
 ## [4.4.1] - 2021-03-05
 

GRRLIB/GRRLIB/GRRLIB_3D.c

@@ -338,7 +338,7 @@ void GRRLIB_ObjectViewInv(f32 posx, f32 posy, f32 posz, f32 angx, f32 angy, f32
 /**
  * Set the texture to an object (contributed by chris_c aka DaShAmAn).
  * @param tex Pointer to an image texture (GRRLIB_texImg format).
- * @param rep Texture Repeat Mode, True will repeat it, False won't.
+ * @param rep Texture Repeat Mode, @c true will repeat it, @c false won't.
  */
 void GRRLIB_SetTexture(GRRLIB_texImg *tex, bool rep) {
     GXTexObj  texObj;
@@ -709,7 +709,7 @@ void GRRLIB_SetLightDiff(u8 num, guVector pos, f32 distattn, f32 brightness, u32
  * @param dir Direction of the specular ray (x/y/z).
  * @param shininess Shininess of the specular. ( between 4 and 254)
  * @param lightcolor Color of the light in RGBA format.
- * @param speccolor Specular color in RGBA format..
+ * @param speccolor Specular color in RGBA format.
  */
 void GRRLIB_SetLightSpec(u8 num, guVector dir, f32 shininess, u32 lightcolor, u32 speccolor) {
     Mtx mr,mv;

GRRLIB/GRRLIB/GRRLIB_fbAdvanced.c

@@ -1,5 +1,5 @@
 /*------------------------------------------------------------------------------
-Copyright (c) 2009-2019 The GRRLIB Team
+Copyright (c) 2009-2022 The GRRLIB Team
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -31,18 +31,16 @@ THE SOFTWARE.
  * @param y Specifies the y-coordinate of the circle.
  * @param radius The radius of the circle.
  * @param color The color of the circle in RGBA format.
- * @param filled Set to true to fill the circle.
+ * @param filled Set to @c true to fill the circle.
  */
 void  GRRLIB_Circle (const f32 x, const f32 y, const f32 radius,
                      const u32 color, const u8 filled) {
     guVector v[36];
     u32 ncolor[36];
-    u32 a;
+    const f32 G_DTOR = M_DTOR * 10;
-    f32 ra;
-    f32 G_DTOR = M_DTOR * 10;
 
-    for (a = 0; a < 36; a++) {
+    for (u32 a = 0; a < 36; a++) {
-        ra = a * G_DTOR;
+        const f32 ra = a * G_DTOR;
 
         v[a].x = cos(ra) * radius + x;
         v[a].y = sin(ra) * radius + y;

GRRLIB/GRRLIB/GRRLIB_fileIO.c

@@ -123,10 +123,10 @@ GRRLIB_ttfFont*  GRRLIB_LoadTTFFromFile(const char *filename) {
 
 /**
  * Make a PNG screenshot.
- * It should be called after drawing stuff on the screen, but before GRRLIB_Render.
+ * It should be called after drawing stuff on the screen, but before GRRLIB_Render().
  * libfat is required to use the function.
  * @param filename Name of the file to write.
- * @return bool true=everything worked, false=problems occurred.
+ * @return Returns @c true if everything worked, @c false if problems occurred.
  */
 bool  GRRLIB_ScrShot(const char* filename) {
     int     ret = -1;

GRRLIB/GRRLIB/GRRLIB_gecko.c

@@ -28,7 +28,7 @@ static bool geckoinit = false;
 
 /**
  * Initialize USB Gecko.
- * @return bool true=everything worked, false=problems occurred.
+ * @return Returns @c true if everything worked, @c false if problems occurred.
  */
 bool GRRLIB_GeckoInit() {
     s32 geckoattached = usb_isgeckoalive(EXI_CHANNEL_1);

GRRLIB/GRRLIB/GRRLIB_snapshot.c

@@ -1,5 +1,5 @@
 /*------------------------------------------------------------------------------
-Copyright (c) 2009-2019 The GRRLIB Team
+Copyright (c) 2009-2022 The GRRLIB Team
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -24,13 +24,15 @@ THE SOFTWARE.
 
 /**
  * Make a snapshot of the screen in a texture WITHOUT ALPHA LAYER.
- * @param posx top left corner of the grabbed part.
+ * @param posx Top left corner of the grabbed part.
- * @param posy top left corner of the grabbed part.
+ * @param posy Top left corner of the grabbed part.
- * @param tex A pointer to a texture representing the screen or NULL if an error occurs.
+ * @param tex A pointer to a texture representing the screen.
- * @param clear When this flag is set to true, the screen is cleared after copy.
+ * @param clear When this flag is set to @c true, the screen is cleared after copy.
  */
 void  GRRLIB_Screen2Texture (int posx, int posy, GRRLIB_texImg *tex, bool clear) {
-    if(tex->data != NULL) {
+    if(tex == NULL || tex->data == NULL) {
+        return;
+    }
     GX_SetTexCopySrc(posx, posy, tex->w, tex->h);
     GX_SetTexCopyDst(tex->w, tex->h, GX_TF_RGBA8, GX_FALSE);
     GX_CopyTex(tex->data, GX_FALSE);
@@ -40,7 +42,6 @@ void  GRRLIB_Screen2Texture (int posx, int posy, GRRLIB_texImg *tex, bool clear)
         GX_CopyDisp(xfb[!fb], GX_TRUE);
     }
 }
-}
 
 /**
  * Start GX compositing process.
@@ -55,9 +56,9 @@ void GRRLIB_CompoStart (void) {
  * End GX compositing process (Make a snapshot of the screen in a texture WITH ALPHA LAYER).
  * EFB is cleared after this function.
  * @see GRRLIB_CompoStart
- * @param posx top left corner of the grabbed part.
+ * @param posx Top left corner of the grabbed part.
- * @param posy top left corner of the grabbed part.
+ * @param posy Top left corner of the grabbed part.
- * @param tex A pointer to a texture representing the screen or NULL if an error occurs.
+ * @param tex A pointer to a texture representing the screen.
  */
 void GRRLIB_CompoEnd(int posx, int posy, GRRLIB_texImg *tex) {
     GRRLIB_Screen2Texture(posx, posy, tex, GX_TRUE);

GRRLIB/GRRLIB/GRRLIB_texEdit.c

@@ -1,5 +1,5 @@
 /*------------------------------------------------------------------------------
-Copyright (c) 2009-2021 The GRRLIB Team
+Copyright (c) 2009-2022 The GRRLIB Team
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -154,13 +154,16 @@ GRRLIB_texImg*  GRRLIB_LoadTexture (const u8 *my_img) {
  *         If image size is not correct, the texture will be completely transparent.
  */
 GRRLIB_texImg*  GRRLIB_LoadTexturePNG (const u8 *my_png) {
-    int width = 0, height = 0;
-    PNGUPROP imgProp;
-    IMGCTX ctx;
     GRRLIB_texImg *my_texture = calloc(1, sizeof(GRRLIB_texImg));
 
-    if (my_texture != NULL) {
+    if (my_texture == NULL) {
-        ctx = PNGU_SelectImageFromBuffer(my_png);
+        return NULL;
+    }
+
+    int width = 0;
+    int height = 0;
+    PNGUPROP imgProp;
+    IMGCTX ctx = PNGU_SelectImageFromBuffer(my_png);
     PNGU_GetImageProperties(ctx, &imgProp);
     my_texture->data = PNGU_DecodeTo4x4RGBA8(ctx, imgProp.imgWidth, imgProp.imgHeight, &width, &height, NULL);
     if (my_texture->data != NULL) {
@@ -174,7 +177,7 @@ GRRLIB_texImg*  GRRLIB_LoadTexturePNG (const u8 *my_png) {
         GRRLIB_FlushTex( my_texture );
     }
     PNGU_ReleaseImageContext(ctx);
-    }
+
     return my_texture;
 }
 
@@ -204,14 +207,18 @@ static RGBQUAD*  GRRLIB_CreatePalette (const u8 *my_bmp, u32 Size) {
  * @return A GRRLIB_texImg structure filled with image information.
  */
 GRRLIB_texImg*  GRRLIB_LoadTextureBMP (const u8 *my_bmp) {
+    GRRLIB_texImg *my_texture = calloc(1, sizeof(GRRLIB_texImg));
+
+    if (my_texture == NULL) {
+        return NULL;
+    }
+
     BITMAPFILEHEADER MyBitmapFileHeader;
     BITMAPINFOHEADER MyBitmapHeader;
     u16 pal_ref;
     u32 BufferSize;
     s32 y, x, i;
-    GRRLIB_texImg *my_texture = calloc(1, sizeof(GRRLIB_texImg));
 
-    if (my_texture != NULL) {
     // Fill file header structure
     MyBitmapFileHeader.bfType      = (my_bmp[0]  | my_bmp[1]<<8);
     MyBitmapFileHeader.bfSize      = (my_bmp[2]  | my_bmp[3]<<8  | my_bmp[4]<<16 | my_bmp[5]<<24);
@@ -332,7 +339,7 @@ GRRLIB_texImg*  GRRLIB_LoadTextureBMP (const u8 *my_bmp) {
         GRRLIB_SetHandle( my_texture, 0, 0 );
         GRRLIB_FlushTex( my_texture );
     }
-    }
+
     return my_texture;
 }
 
@@ -365,14 +372,15 @@ GRRLIB_texImg*  GRRLIB_LoadTextureJPG (const u8 *my_jpg) {
  * @return A GRRLIB_texImg structure filled with image information.
  */
 GRRLIB_texImg*  GRRLIB_LoadTextureJPGEx (const u8 *my_jpg, const int my_size) {
-    struct jpeg_decompress_struct cinfo;
-    struct jpeg_error_mgr jerr;
     GRRLIB_texImg *my_texture = calloc(1, sizeof(GRRLIB_texImg));
 
     if (my_texture == NULL) {
         return NULL;
     }
 
+    struct jpeg_decompress_struct cinfo;
+    struct jpeg_error_mgr jerr;
+
     jpeg_create_decompress(&cinfo);
     cinfo.err = jpeg_std_error(&jerr);
     cinfo.progress = NULL;

GRRLIB/GRRLIB/grrlib/GRRLIB_collision.h

@@ -33,7 +33,7 @@ THE SOFTWARE.
  * @param hoth The height of the rectangle.
  * @param wpadx Specifies the x-coordinate of the point.
  * @param wpady Specifies the y-coordinate of the point.
- * @return If the specified point lies within the rectangle, the return value is true otherwise it's false.
+ * @return If the specified point lies within the rectangle, the return value is @c true otherwise it's @c false.
  */
 INLINE
 bool  GRRLIB_PtInRect (const int hotx,   const int hoty,
@@ -53,7 +53,7 @@ bool  GRRLIB_PtInRect (const int hotx,   const int hoty,
  * @param rect2y Specifies the y-coordinate of the upper-left corner of the rectangle.
  * @param rect2w Specifies the width of the rectangle.
  * @param rect2h Specifies the height of the rectangle.
- * @return If the specified rectangle lies within the other rectangle, the return value is true otherwise it's false.
+ * @return If the specified rectangle lies within the other rectangle, the return value is @c true otherwise it's @c false.
  */
 INLINE
 bool  GRRLIB_RectInRect (const int rect1x, const int rect1y,
@@ -75,7 +75,7 @@ bool  GRRLIB_RectInRect (const int rect1x, const int rect1y,
  * @param rect2y Specifies the y-coordinate of the upper-left corner of the second rectangle.
  * @param rect2w Specifies the width of the second rectangle.
  * @param rect2h Specifies the height of the second rectangle.
- * @return If the specified rectangle lies on the other rectangle, the return value is true otherwise it's false.
+ * @return If the specified rectangle lies on the other rectangle, the return value is @c true otherwise it's @c false.
  */
 INLINE
 bool  GRRLIB_RectOnRect (const int rect1x, const int rect1y,

GRRLIB/GRRLIB/grrlib/GRRLIB_fbSimple.h

@@ -76,7 +76,7 @@ void  GRRLIB_Line (const f32 x1, const f32 y1,
  * @param width The width of the rectangle.
  * @param height The height of the rectangle.
  * @param color The color of the rectangle in RGBA format.
- * @param filled Set to true to fill the rectangle.
+ * @param filled Set to @c true to fill the rectangle.
  */
 INLINE
 void  GRRLIB_Rectangle (const f32 x,      const f32 y,

GRRLIB/GRRLIB/grrlib/GRRLIB_settings.h

@@ -73,7 +73,7 @@ GRRLIB_blendMode  GRRLIB_GetBlend (void) {
 
 /**
  * Turn anti-aliasing on/off.
- * @param aa Set to true to enable anti-aliasing (Default: Enabled).
+ * @param aa Set to @c true to enable anti-aliasing (Default: Enabled).
  */
 INLINE
 void  GRRLIB_SetAntiAliasing (const bool aa) {
@@ -82,10 +82,9 @@ void  GRRLIB_SetAntiAliasing (const bool aa) {
 
 /**
  * Get current anti-aliasing setting.
- * @return True if anti-aliasing is enabled.
+ * @return Returns @c true if anti-aliasing is enabled.
  */
 INLINE
 bool  GRRLIB_GetAntiAliasing (void) {
     return GRRLIB_Settings.antialias;
 }
-

GRRLIB/lib/pngu/pngu.c

@@ -671,7 +671,7 @@ PNGU_u8 * PNGU_DecodeTo4x4RGBA8 (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, in
 	return dst;
 }
 
-// Coded by Tantric for libwiigui (http://code.google.com/p/libwiigui)
+// Coded by Tantric for libwiigui (https://github.com/dborth/libwiigui)
 int PNGU_EncodeFromRGB (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride)
 {
 	png_uint_32 rowbytes;

GRRLIB/lib/pngu/pngu.h

@@ -55,7 +55,7 @@ typedef struct
 	PNGU_u32 imgBitDepth; // In bitx
 	PNGU_u32 imgColorType; // PNGU_COLOR_TYPE_*
 	PNGU_u32 validBckgrnd; // Non zero if there is a background color
-	PNGUCOLOR bckgrnd; // Backgroun color
+	PNGUCOLOR bckgrnd; // Background color
 	PNGU_u32 numTrans; // Number of transparent colors
 	PNGUCOLOR *trans; // Transparent colors
 } PNGUPROP;

README.md

@@ -43,7 +43,7 @@ to allow real-time loading and saving of graphical data, and thus requires
 libgrrlib          <- 2D/3D graphics library
 ├── libfat         <- File I/O
 ├── libjpeg        <- JPEG image processor
-├── libpngu        <- Wii wrapper for libpng
+├── libpngu        <- Wrapper for libpng
 │   └── libpng     <- PNG image processor
 └── libfreetype    <- TrueType font processor
 ```