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[CHG] Documentation improvement

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[CHG] Avoid divisions by zero in GRRLIB_InitTileSet
This commit is contained in:
Crayon2000 2009-02-26 22:05:58 +00:00
parent ca422e6867
commit 971bc0f9b5
2 changed files with 24 additions and 23 deletions
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31
GRRLIB/GRRLIB/GRRLIB.c
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@ -13,7 +13,7 @@
#include "../lib/libjpeg/jpeglib.h" #include "../lib/libjpeg/jpeglib.h"
#include "GRRLIB.h" #include "GRRLIB.h"
#define DEFAULT_FIFO_SIZE (256 * 1024) #define DEFAULT_FIFO_SIZE (256 * 1024) /**< GX fifo buffer size. */
u32 fb = 0; u32 fb = 0;
static void *xfb[2] = {NULL, NULL}; static void *xfb[2] = {NULL, NULL};
@ -36,7 +36,7 @@ inline void GRRLIB_FillScreen(u32 color) {
* Draw a dot. * Draw a dot.
* @param x specifies the x-coordinate of the dot. * @param x specifies the x-coordinate of the dot.
* @param y specifies the y-coordinate of the dot. * @param y specifies the y-coordinate of the dot.
* @param color the color of the dot. * @param color the color of the dot in RGBA format.
*/ */
inline void GRRLIB_Plot(f32 x, f32 y, u32 color) { inline void GRRLIB_Plot(f32 x, f32 y, u32 color) {
Vector v[] = {{x,y,0.0f}}; Vector v[] = {{x,y,0.0f}};
@ -60,7 +60,7 @@ void GRRLIB_NPlot(Vector v[], u32 color, long n) {
* @param y1 start point for line for the y coordinate. * @param y1 start point for line for the y coordinate.
* @param x2 end point for line for the x coordinate. * @param x2 end point for line for the x coordinate.
* @param y2 end point for line for the x coordinate. * @param y2 end point for line for the x coordinate.
* @param color line color. * @param color line color in RGBA format.
*/ */
inline void GRRLIB_Line(f32 x1, f32 y1, f32 x2, f32 y2, u32 color) { inline void GRRLIB_Line(f32 x1, f32 y1, f32 x2, f32 y2, u32 color) {
Vector v[] = {{x1,y1,0.0f}, {x2,y2,0.0f}}; Vector v[] = {{x1,y1,0.0f}, {x2,y2,0.0f}};
@ -74,7 +74,7 @@ inline void GRRLIB_Line(f32 x1, f32 y1, f32 x2, f32 y2, u32 color) {
* @param y specifies the y-coordinate of the upper-left corner of the rectangle. * @param y specifies the y-coordinate of the upper-left corner of the rectangle.
* @param width the width of the rectangle. * @param width the width of the rectangle.
* @param height the height of the rectangle. * @param height the height of the rectangle.
* @param color the color of the rectangle. * @param color the color of the rectangle in RGBA format.
* @param filled true to fill the rectangle with a color. * @param filled true to fill the rectangle with a color.
*/ */
inline void GRRLIB_Rectangle(f32 x, f32 y, f32 width, f32 height, u32 color, u8 filled) { inline void GRRLIB_Rectangle(f32 x, f32 y, f32 width, f32 height, u32 color, u8 filled) {
@ -93,7 +93,7 @@ inline void GRRLIB_Rectangle(f32 x, f32 y, f32 width, f32 height, u32 color, u8
/** /**
* Draw a polygon. * Draw a polygon.
* @param v * @param v
* @param color * @param color the color of the polygon in RGBA format.
* @param n * @param n
*/ */
void GRRLIB_NGone(Vector v[], u32 color, long n) { void GRRLIB_NGone(Vector v[], u32 color, long n) {
@ -103,7 +103,7 @@ void GRRLIB_NGone(Vector v[], u32 color, long n) {
/** /**
* Draw a filled polygon. * Draw a filled polygon.
* @param v * @param v
* @param color * @param color the color of the filled polygon in RGBA format.
* @param n * @param n
*/ */
void GRRLIB_NGoneFilled(Vector v[], u32 color, long n) { void GRRLIB_NGoneFilled(Vector v[], u32 color, long n) {
@ -112,16 +112,18 @@ void GRRLIB_NGoneFilled(Vector v[], u32 color, long n) {
/** /**
* Initialize a tile set. * Initialize a tile set.
* @param tex * @param tex texture to initialize.
* @param tilew * @param tilew widht of the tile.
* @param tileh * @param tileh height of the tile.
* @param tilestart * @param tilestart offset for starting position.
*/ */
void GRRLIB_InitTileSet(struct GRRLIB_texImg *tex, unsigned int tilew, unsigned int tileh, unsigned int tilestart) { void GRRLIB_InitTileSet(struct GRRLIB_texImg *tex, unsigned int tilew, unsigned int tileh, unsigned int tilestart) {
tex->tilew = tilew; tex->tilew = tilew;
tex->tileh = tileh; tex->tileh = tileh;
tex->nbtilew = tex->w / tilew; if(tilew) // Avoid division by zero
tex->nbtileh = tex->h / tileh; tex->nbtilew = tex->w / tilew;
if(tileh) // Avoid division by zero
tex->nbtileh = tex->h / tileh;
tex->tilestart = tilestart; tex->tilestart = tilestart;
} }
@ -369,7 +371,6 @@ void GRRLIB_FreeBMF(GRRLIB_bytemapFont bmf)
* @return A GRRLIB_texImg structure filled with imgage informations. * @return A GRRLIB_texImg structure filled with imgage informations.
*/ */
GRRLIB_texImg GRRLIB_LoadTexture(const unsigned char my_img[]) { GRRLIB_texImg GRRLIB_LoadTexture(const unsigned char my_img[]) {
if(my_img[0]==0xFF && my_img[1]==0xD8 && my_img[2]==0xFF) { if(my_img[0]==0xFF && my_img[1]==0xD8 && my_img[2]==0xFF) {
return(GRRLIB_LoadTextureJPG(my_img)); return(GRRLIB_LoadTextureJPG(my_img));
} }
@ -601,7 +602,7 @@ bool GRRLIB_RectOnRect(int rect1x, int rect1y, int rect1w, int rect1h, int rect2
* @param x specifies the x-coordinate of the pixel in the texture. * @param x specifies the x-coordinate of the pixel in the texture.
* @param y specifies the y-coordinate of the pixel in the texture. * @param y specifies the y-coordinate of the pixel in the texture.
* @param tex texture to get the color from. * @param tex texture to get the color from.
* @return The color of a pixel. * @return The color of a pixel in RGBA format.
*/ */
u32 GRRLIB_GetPixelFromtexImg(int x, int y, GRRLIB_texImg tex) { u32 GRRLIB_GetPixelFromtexImg(int x, int y, GRRLIB_texImg tex) {
u8 *truc = (u8*)tex.data; u8 *truc = (u8*)tex.data;
@ -624,7 +625,7 @@ u32 GRRLIB_GetPixelFromtexImg(int x, int y, GRRLIB_texImg tex) {
* @param x specifies the x-coordinate of the pixel in the texture. * @param x specifies the x-coordinate of the pixel in the texture.
* @param y specifies the y-coordinate of the pixel in the texture. * @param y specifies the y-coordinate of the pixel in the texture.
* @param tex texture to set the color to. * @param tex texture to set the color to.
* @param color the color of the pixel. * @param color the color of the pixel in RGBA format.
*/ */
void GRRLIB_SetPixelTotexImg(int x, int y, GRRLIB_texImg tex, u32 color) { void GRRLIB_SetPixelTotexImg(int x, int y, GRRLIB_texImg tex, u32 color) {
u8 *truc = (u8*)tex.data; u8 *truc = (u8*)tex.data;

16
GRRLIB/GRRLIB/GRRLIB.h
View file

@ -23,14 +23,14 @@
* Structure to hold the texture informations. * Structure to hold the texture informations.
*/ */
typedef struct GRRLIB_texImg{ typedef struct GRRLIB_texImg{
unsigned int w; /**< width of the texture. */ unsigned int w; /**< Width of the texture. */
unsigned int h; /**< height of the texture. */ unsigned int h; /**< Height of the texture. */
unsigned int tilew; /**< widht of a tile. */ unsigned int tilew; /**< Widht of a tile. */
unsigned int tileh; /**< height of a tile. */ unsigned int tileh; /**< Height of a tile. */
unsigned int nbtilew; /**< number of tiles for the x axis. */ unsigned int nbtilew; /**< Number of tiles for the x axis. */
unsigned int nbtileh; /**< number of tiles for the y axis. */ unsigned int nbtileh; /**< Number of tiles for the y axis. */
unsigned int tilestart; /**< offset for starting position. */ unsigned int tilestart; /**< Offset for starting position. */
void *data; /**< pointer to the texture data. */ void *data; /**< Pointer to the texture data. */
} GRRLIB_texImg; } GRRLIB_texImg;
/** /**