This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
surface.c
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/**
* Automated SDL_Surface test.
*
* Written by Edgar Simo "bobbens"
*
* Released under Public Domain.
*/
#include "SDL.h"
#include "SDL_at.h"
#if (SDL_BYTEORDER == SDL_BIG_ENDIAN)
# define RMASK 0xff000000 /**< Red bit mask. */
# define GMASK 0x00ff0000 /**< Green bit mask. */
# define BMASK 0x0000ff00 /**< Blue bit mask. */
# define AMASK 0x000000ff /**< Alpha bit mask. */
#else
# define RMASK 0x000000ff /**< Red bit mask. */
# define GMASK 0x0000ff00 /**< Green bit mask. */
# define BMASK 0x00ff0000 /**< Blue bit mask. */
# define AMASK 0xff000000 /**< Alpha bit mask. */
#endif
typedef struct SurfaceImage_s {
unsigned int width;
unsigned int height;
unsigned int bytes_per_pixel; /* 3:RGB, 4:RGBA */
const unsigned char pixel_data[];
} SurfaceImage_t;
/*
* Pull in images for testcases.
*/
#include "primitives.c"
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#include "blend.c"
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#include "face.c"
#include "blit.c"
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/**
* @brief Compares a surface and a surface image for equality.
*
* @param sur Surface to compare.
* @param img Image to compare against.
* @return 0 if they are the same, -1 on error and positive if different.
*/
static int surface_compare( SDL_Surface *sur, const SurfaceImage_t *img )
{
int ret;
int i,j;
Uint32 pix;
int bpp;
Uint8 *p, *pd;
/* Make sure size is the same. */
if ((sur->w != img->width) || (sur->h != img->height))
return -1;
SDL_LockSurface( sur );
ret = 0;
bpp = sur->format->BytesPerPixel;
/* Compare image - should be same format. */
for (j=0; j<sur->h; j++) {
for (i=0; i<sur->w; i++) {
p = (Uint8 *)sur->pixels + j * sur->pitch + i * bpp;
pd = (Uint8 *)img->pixel_data + (j*img->width + i) * img->bytes_per_pixel;
switch (bpp) {
case 1:
/* Paletted not supported atm. */
ret += 1;
break;
case 2:
/* 16 BPP not supported atm. */
ret += 1;
break;
case 3:
/* 24 BPP not supported atm. */
ret += 1;
break;
case 4:
ret += !( (p[0] == pd[0]) &&
(p[1] == pd[1]) &&
(p[2] == pd[2]) );
break;
}
}
}
SDL_UnlockSurface( sur );
return ret;
}
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/**
* @brief Tests sprite loading.
*/
static void surface_testLoad (void)
{
int ret;
SDL_Surface *face, *rface, *testsur;
SDL_ATbegin( "Load Test" );
/* Create the blit surface. */
face = SDL_LoadBMP("../icon.bmp");
if (SDL_ATassert( "SDL_CreateLoadBmp", face != NULL))
return;
/* Set transparent pixel as the pixel at (0,0) */
if (face->format->palette) {
ret = SDL_SetColorKey(face, (SDL_SRCCOLORKEY | SDL_RLEACCEL),
*(Uint8 *) face->pixels);
if (SDL_ATassert( "SDL_SetColorKey", ret == 0))
return;
}
/* Create the test surface. */
testsur = SDL_CreateRGBSurface( 0, 80, 60, 32,
RMASK, GMASK, BMASK, AMASK );
if (SDL_ATassert( "SDL_CreateRGBSurface", testsur != NULL))
return;
/* Convert to 32 bit to compare. */
rface = SDL_ConvertSurface( face, testsur->format, 0 );
if (SDL_ATassert( "SDL_ConvertSurface", rface != NULL))
return;
/* See if it's the same. */
if (SDL_ATassert( "Primitives output not the same.",
surface_compare( rface, &img_face)==0 ))
return;
/* Clean up. */
SDL_FreeSurface( testsur );
SDL_FreeSurface( rface );
SDL_FreeSurface( face );
SDL_ATend();
}
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/**
* @brief Tests the SDL primitives for rendering.
*/
static void surface_testPrimitives (void)
{
int ret;
int x, y;
SDL_Rect rect;
SDL_Surface *testsur;
SDL_ATbegin( "Primitives Test" );
/* Create the surface. */
testsur = SDL_CreateRGBSurface( 0, 80, 60, 32,
RMASK, GMASK, BMASK, AMASK );
if (SDL_ATassert( "SDL_CreateRGBSurface", testsur != NULL))
return;
/* Draw a rectangle. */
rect.x = 40;
rect.y = 0;
rect.w = 40;
rect.h = 80;
ret = SDL_FillRect( testsur, &rect,
SDL_MapRGB( testsur->format, 13, 73, 200 ) );
if (SDL_ATassert( "SDL_FillRect", ret == 0))
return;
/* Draw a rectangle. */
rect.x = 10;
rect.y = 10;
rect.w = 60;
rect.h = 40;
ret = SDL_FillRect( testsur, &rect,
SDL_MapRGB( testsur->format, 200, 0, 100 ) );
if (SDL_ATassert( "SDL_FillRect", ret == 0))
return;
/* Draw some points like so:
* X.X.X.X..
* .X.X.X.X.
* X.X.X.X.. */
for (y=0; y<3; y++) {
x = y % 2;
for (; x<80; x+=2)
ret = SDL_DrawPoint( testsur, x, y,
SDL_MapRGB( testsur->format, x*y, x*y/2, x*y/3 ) );
if (SDL_ATassert( "SDL_DrawPoint", ret == 0))
return;
}
/* Draw some lines. */
ret = SDL_DrawLine( testsur, 0, 30, 80, 30,
SDL_MapRGB( testsur->format, 0, 255, 0 ) );
if (SDL_ATassert( "SDL_DrawLine", ret == 0))
return;
ret = SDL_DrawLine( testsur, 40, 30, 40, 60,
SDL_MapRGB( testsur->format, 55, 55, 5 ) );
if (SDL_ATassert( "SDL_DrawLine", ret == 0))
return;
ret = SDL_DrawLine( testsur, 0, 60, 80, 0,
SDL_MapRGB( testsur->format, 5, 105, 105 ) );
if (SDL_ATassert( "SDL_DrawLine", ret == 0))
return;
/* See if it's the same. */
if (SDL_ATassert( "Primitives output not the same.",
surface_compare( testsur, &img_primitives )==0 ))
return;
/* Clean up. */
SDL_FreeSurface( testsur );
SDL_ATend();
}
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/**
* @brief Tests the SDL primitives with alpha for rendering.
*/
static void surface_testPrimitivesAlpha (void)
{
int ret;
int i, j;
SDL_Rect rect;
SDL_Surface *testsur;
SDL_ATbegin( "Primitives Alpha Test" );
/* Create the surface. */
testsur = SDL_CreateRGBSurface( 0, 80, 60, 32,
RMASK, GMASK, BMASK, AMASK );
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if (SDL_ATassert( "SDL_CreateRGBSurface", testsur != NULL))
return;
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/* Create some rectangles for each blend mode. */
ret = SDL_BlendRect( testsur, NULL, SDL_BLENDMODE_NONE, 255, 255, 255, 0 );
if (SDL_ATassert( "SDL_BlendRect", ret == 0))
return;
rect.x = 10;
rect.y = 25;
rect.w = 40;
rect.h = 25;
ret = SDL_BlendRect( testsur, &rect, SDL_BLENDMODE_ADD, 240, 10, 10, 75 );
if (SDL_ATassert( "SDL_BlendRect", ret == 0))
return;
rect.x = 30;
rect.y = 40;
rect.w = 45;
rect.h = 15;
ret = SDL_BlendRect( testsur, &rect, SDL_BLENDMODE_BLEND, 10, 240, 10, 100 );
if (SDL_ATassert( "SDL_BlendRect", ret == 0))
return;
rect.x = 25;
rect.y = 25;
rect.w = 25;
rect.h = 25;
ret = SDL_BlendRect( testsur, &rect, SDL_BLENDMODE_MOD, 10, 10, 240, 125 );
if (SDL_ATassert( "SDL_BlendRect", ret == 0))
return;
/* Draw blended lines, lines for everyone. */
for (i=0; i<testsur->w; i+=2) {
ret = SDL_BlendLine( testsur, 0, 0, i, 59,
(((i/2)%3)==0) ? SDL_BLENDMODE_BLEND :
(((i/2)%3)==1) ? SDL_BLENDMODE_ADD : SDL_BLENDMODE_MOD,
60+2*j, 240-2*j, 50, 3*j );
if (SDL_ATassert( "SDL_BlendLine", ret == 0))
return;
}
for (i=0; i<testsur->h; i+=2) {
ret = SDL_BlendLine( testsur, 0, 0, 79, i,
(((i/2)%3)==0) ? SDL_BLENDMODE_BLEND :
(((i/2)%3)==1) ? SDL_BLENDMODE_ADD : SDL_BLENDMODE_MOD,
60+2*j, 240-2*j, 50, 3*j );
if (SDL_ATassert( "SDL_BlendLine", ret == 0))
return;
}
/* Draw points. */
for (j=0; j<testsur->h; j+=3) {
for (i=0; i<testsur->w; i+=3) {
ret = SDL_BlendPoint( testsur, i, j,
((((i+j)/3)%3)==0) ? SDL_BLENDMODE_BLEND :
((((i+j)/3)%3)==1) ? SDL_BLENDMODE_ADD : SDL_BLENDMODE_MOD,
j*4, i*3, j*4, i*3 );
if (SDL_ATassert( "SDL_BlendPoint", ret == 0))
return;
}
}
/* See if it's the same. */
if (SDL_ATassert( "Primitives output not the same.",
surface_compare( testsur, &img_blend )==0 ))
return;
/* Clean up. */
SDL_FreeSurface( testsur );
SDL_ATend();
}
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/**
* @brief Tests some blitting routines.
*/
static void surface_testBlit (void)
{
int ret;
SDL_Rect rect;
SDL_Surface *face, *testsur;
int i, j, ni, nj;
int mode;
SDL_ATbegin( "Blit Test" );
/* Create the blit surface. */
face = SDL_LoadBMP("../icon.bmp");
if (SDL_ATassert( "SDL_CreateLoadBmp", face != NULL))
return;
/* Set transparent pixel as the pixel at (0,0) */
if (face->format->palette)
SDL_SetColorKey(face, (SDL_SRCCOLORKEY | SDL_RLEACCEL),
*(Uint8 *) face->pixels);
/*
face = SDL_CreateRGBSurfaceFrom( (void*)img_face.pixel_data,
img_face.width, img_face.height, 32, img_face.width*4,
RMASK, GMASK, BMASK, AMASK );
if (SDL_ATassert( "SDL_CreateRGBSurfaceFrom", face != NULL))
return;
*/
/* Create the test surface. */
testsur = SDL_CreateRGBSurface( 0, 80, 60, 32,
RMASK, GMASK, BMASK, AMASK );
if (SDL_ATassert( "SDL_CreateRGBSurface", testsur != NULL))
return;
/* Steps to take. */
ni = 40;
nj = 30;
/* Constant values. */
rect.w = face->w;
rect.h = face->h;
/* Loop blit. */
for (j=0; j <= testsur->h - face->h; j+=4) {
for (i=0; i <= testsur->w - face->w; i+=4) {
/* Blitting. */
rect.x = i;
rect.y = j;
ret = SDL_BlitSurface( face, NULL, testsur, &rect );
if (SDL_ATassert( "SDL_BlitSurface", ret == 0))
return;
}
}
/* See if it's the same. */
if (SDL_ATassert( "Blitting output not the same.",
surface_compare( testsur, &img_blit )==0 ))
return;
/* Clean up. */
SDL_FreeSurface( face );
SDL_FreeSurface( testsur );
SDL_ATend();
}
/**
* @brief Tests some more blitting routines.
*/
static void surface_testBlitAlpha (void)
{
int ret;
SDL_Rect rect;
SDL_Surface *face, *testsur;
int i, j, ni, nj;
int mode;
SDL_ATbegin( "Blit Alpha Test" );
/* Create the blit surface. */
face = SDL_CreateRGBSurfaceFrom( (void*)img_face.pixel_data,
img_face.width, img_face.height, 32, img_face.width*4,
RMASK, GMASK, BMASK, AMASK );
if (SDL_ATassert( "SDL_CreateRGBSurfaceFrom", face != NULL))
return;
/* Create the test surface. */
testsur = SDL_CreateRGBSurface( 0, 80, 60, 32,
RMASK, GMASK, BMASK, AMASK );
if (SDL_ATassert( "SDL_CreateRGBSurface", testsur != NULL))
return;
/* Steps to take. */
ni = 40;
nj = 30;
/* Constant values. */
rect.w = face->w;
rect.h = face->h;
/* Loop blit. */
for (j=0; j <= testsur->h - face->h; j+=4) {
for (i=0; i <= testsur->w - face->w; i+=4) {
/* Set colour mod. */
ret = SDL_SetSurfaceColorMod( face, (255/nj)*j, (255/ni)*i, (255/nj)*j );
if (SDL_ATassert( "SDL_SetSurfaceColorMod", ret == 0))
return;
/* Set alpha mod. */
ret = SDL_SetSurfaceAlphaMod( face, (255/ni)*i );
if (SDL_ATassert( "SDL_SetSurfaceAlphaMod", ret == 0))
return;
/* Crazy blending mode magic. */
mode = (i*j)%5;
if (mode==0) mode = SDL_BLENDMODE_NONE;
else if (mode==1) mode = SDL_BLENDMODE_MASK;
else if (mode==2) mode = SDL_BLENDMODE_BLEND;
else if (mode==3) mode = SDL_BLENDMODE_ADD;
else if (mode==4) mode = SDL_BLENDMODE_MOD;
ret = SDL_SetSurfaceBlendMode( face, mode );
if (SDL_ATassert( "SDL_SetSurfaceBlendMode", ret == 0))
return;
/* Blitting. */
rect.x = i;
rect.y = j;
ret = SDL_BlitSurface( face, NULL, testsur, &rect );
if (SDL_ATassert( "SDL_BlitSurface", ret == 0))
return;
}
}
SDL_SaveBMP( testsur, "blit.bmp" );
/* Clean up. */
SDL_FreeSurface( face );
SDL_FreeSurface( testsur );
SDL_ATend();
}
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/**
* @brief Entry point.
*/
int main( int argc, const char *argv[] )
{
SDL_ATinit( "SDL_Surface" );
/* Initializes the SDL subsystems. */
SDL_Init(0);
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surface_testLoad();
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surface_testPrimitives();
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surface_testPrimitivesAlpha();
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surface_testBlit();
/*surface_testBlitAlpha();*/
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/* Exit SDL. */
SDL_Quit();
return SDL_ATfinish(1);
}