/**

* Original code: automated SDL platform test written by Edgar Simo "bobbens"

* Extended and extensively updated by aschiffler at ferzkopp dot net

*/

#include <stdio.h>

#include "SDL.h"

#include "SDL_test.h"

/* ================= Test Case Implementation ================== */

#define TESTRENDER_SCREEN_W 80

#define TESTRENDER_SCREEN_H 60

#define RENDER_COMPARE_FORMAT SDL_PIXELFORMAT_ARGB8888

#define RENDER_COMPARE_AMASK 0xff000000 /**< Alpha bit mask. */

#define RENDER_COMPARE_RMASK 0x00ff0000 /**< Red bit mask. */

#define RENDER_COMPARE_GMASK 0x0000ff00 /**< Green bit mask. */

#define RENDER_COMPARE_BMASK 0x000000ff /**< Blue bit mask. */

#define ALLOWABLE_ERROR_OPAQUE 0

#define ALLOWABLE_ERROR_BLENDED 64

/* Test window and renderer */

SDL_Window *window = NULL;

SDL_Renderer *renderer = NULL;

/* Prototypes for helper functions */

static int _clearScreen (void);

static void _compare(SDL_Surface *reference, int allowable_error);

static int _hasTexAlpha(void);

static int _hasTexColor(void);

static SDL_Texture *_loadTestFace(void);

static int _hasBlendModes(void);

static int _hasDrawColor(void);

static int _isSupported(int code);

/**

* Create software renderer for tests

*/

void InitCreateRenderer(void *arg)

{

int posX = 100, posY = 100, width = 320, height = 240;

renderer = NULL;

window = SDL_CreateWindow("render_testCreateRenderer", posX, posY, width, height, 0);

SDLTest_AssertPass("SDL_CreateWindow()");

SDLTest_AssertCheck(window != NULL, "Check SDL_CreateWindow result");

if (window == NULL) {

return;

}

renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);

SDLTest_AssertPass("SDL_CreateRenderer()");

SDLTest_AssertCheck(renderer != 0, "Check SDL_CreateRenderer result");

if (renderer == NULL) {

SDL_DestroyWindow(window);

return;

}

}

/*

* Destroy renderer for tests

*/

void CleanupDestroyRenderer(void *arg)

{

if (renderer != NULL) {

SDL_DestroyRenderer(renderer);

renderer = NULL;

SDLTest_AssertPass("SDL_DestroyRenderer()");

}

if (window != NULL) {

SDL_DestroyWindow(window);

window = NULL;

SDLTest_AssertPass("SDL_DestroyWindow");

}

}

/**

* @brief Tests call to SDL_GetNumRenderDrivers

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_GetNumRenderDrivers

*/

int

render_testGetNumRenderDrivers(void *arg)

{

int n;

n = SDL_GetNumRenderDrivers();

SDLTest_AssertCheck(n >= 1, "Number of renderers >= 1, reported as %i", n);

return TEST_COMPLETED;

}

/**

* @brief Tests the SDL primitives for rendering.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetRenderDrawColor

* http://wiki.libsdl.org/moin.cgi/SDL_RenderFillRect

* http://wiki.libsdl.org/moin.cgi/SDL_RenderDrawLine

*

*/

int render_testPrimitives (void *arg)

{

int ret;

int x, y;

SDL_Rect rect;

SDL_Surface *referenceSurface = NULL;

int checkFailCount1;

int checkFailCount2;

/* Need drawcolour or just skip test. */

SDLTest_AssertCheck(_hasDrawColor(), "_hasDrawColor");

/* Draw a rectangle. */

rect.x = 40;

rect.y = 0;

rect.w = 40;

rect.h = 80;

ret = SDL_SetRenderDrawColor(renderer, 13, 73, 200, SDL_ALPHA_OPAQUE );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawColor, expected: 0, got: %i", ret);

ret = SDL_RenderFillRect(renderer, &rect );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderFillRect, expected: 0, got: %i", ret);

/* Draw a rectangle. */

rect.x = 10;

rect.y = 10;

rect.w = 60;

rect.h = 40;

ret = SDL_SetRenderDrawColor(renderer, 200, 0, 100, SDL_ALPHA_OPAQUE );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawColor, expected: 0, got: %i", ret);

ret = SDL_RenderFillRect(renderer, &rect );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderFillRect, expected: 0, got: %i", ret);

/* Draw some points like so:

* X.X.X.X..

* .X.X.X.X.

* X.X.X.X.. */

checkFailCount1 = 0;

checkFailCount2 = 0;

for (y=0; y<3; y++) {

for (x = y % 2; x<TESTRENDER_SCREEN_W; x+=2) {

ret = SDL_SetRenderDrawColor(renderer, x*y, x*y/2, x*y/3, SDL_ALPHA_OPAQUE );

if (ret != 0) checkFailCount1++;

ret = SDL_RenderDrawPoint(renderer, x, y );

if (ret != 0) checkFailCount2++;

}

}

SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_SetRenderDrawColor, expected: 0, got: %i", checkFailCount1);

SDLTest_AssertCheck(checkFailCount2 == 0, "Validate results from calls to SDL_RenderDrawPoint, expected: 0, got: %i", checkFailCount2);

/* Draw some lines. */

ret = SDL_SetRenderDrawColor(renderer, 0, 255, 0, SDL_ALPHA_OPAQUE );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawColor");

ret = SDL_RenderDrawLine(renderer, 0, 30, TESTRENDER_SCREEN_W, 30 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderDrawLine, expected: 0, got: %i", ret);

ret = SDL_SetRenderDrawColor(renderer, 55, 55, 5, SDL_ALPHA_OPAQUE );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawColor, expected: 0, got: %i", ret);

ret = SDL_RenderDrawLine(renderer, 40, 30, 40, 60 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderDrawLine, expected: 0, got: %i", ret);

ret = SDL_SetRenderDrawColor(renderer, 5, 105, 105, SDL_ALPHA_OPAQUE );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawColor, expected: 0, got: %i", ret);

ret = SDL_RenderDrawLine(renderer, 0, 0, 29, 29 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderDrawLine, expected: 0, got: %i", ret);

ret = SDL_RenderDrawLine(renderer, 29, 30, 0, 59 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderDrawLine, expected: 0, got: %i", ret);

ret = SDL_RenderDrawLine(renderer, 79, 0, 50, 29 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderDrawLine, expected: 0, got: %i", ret);

ret = SDL_RenderDrawLine(renderer, 79, 59, 50, 30 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderDrawLine, expected: 0, got: %i", ret);

/* See if it's the same. */

referenceSurface = SDLTest_ImagePrimitives();

_compare(referenceSurface, ALLOWABLE_ERROR_OPAQUE );

/* Clean up. */

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

return TEST_COMPLETED;

}

/**

* @brief Tests the SDL primitives with alpha for rendering.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetRenderDrawColor

* http://wiki.libsdl.org/moin.cgi/SDL_SetRenderDrawBlendMode

* http://wiki.libsdl.org/moin.cgi/SDL_RenderFillRect

*/

int render_testPrimitivesBlend (void *arg)

{

int ret;

int i, j;

SDL_Rect rect;

SDL_Surface *referenceSurface = NULL;

int checkFailCount1;

int checkFailCount2;

int checkFailCount3;

/* Need drawcolour and blendmode or just skip test. */

SDLTest_AssertCheck(_hasDrawColor(), "_hasDrawColor");

SDLTest_AssertCheck(_hasBlendModes(), "_hasBlendModes");

/* Create some rectangles for each blend mode. */

ret = SDL_SetRenderDrawColor(renderer, 255, 255, 255, 0 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawColor, expected: 0, got: %i", ret);

ret = SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_NONE );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawBlendMode, expected: 0, got: %i", ret);

ret = SDL_RenderFillRect(renderer, NULL );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderFillRect, expected: 0, got: %i", ret);

rect.x = 10;

rect.y = 25;

rect.w = 40;

rect.h = 25;

ret = SDL_SetRenderDrawColor(renderer, 240, 10, 10, 75 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawColor, expected: 0, got: %i", ret);

ret = SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_ADD );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawBlendMode, expected: 0, got: %i", ret);

ret = SDL_RenderFillRect(renderer, &rect );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderFillRect, expected: 0, got: %i", ret);

rect.x = 30;

rect.y = 40;

rect.w = 45;

rect.h = 15;

ret = SDL_SetRenderDrawColor(renderer, 10, 240, 10, 100 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawColor, expected: 0, got: %i", ret);

ret = SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawBlendMode, expected: 0, got: %i", ret);

ret = SDL_RenderFillRect(renderer, &rect );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderFillRect, expected: 0, got: %i", ret);

rect.x = 25;

rect.y = 25;

rect.w = 25;

rect.h = 25;

ret = SDL_SetRenderDrawColor(renderer, 10, 10, 240, 125 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawColor, expected: 0, got: %i", ret);

ret = SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_NONE );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetRenderDrawBlendMode, expected: 0, got: %i", ret);

ret = SDL_RenderFillRect(renderer, &rect );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_RenderFillRect, expected: 0, got: %i", ret);

/* Draw blended lines, lines for everyone. */

checkFailCount1 = 0;

checkFailCount2 = 0;

checkFailCount3 = 0;

for (i=0; i<TESTRENDER_SCREEN_W; i+=2) {

ret = SDL_SetRenderDrawColor(renderer, 60+2*i, 240-2*i, 50, 3*i );

if (ret != 0) checkFailCount1++;

ret = SDL_SetRenderDrawBlendMode(renderer,(((i/2)%3)==0) ? SDL_BLENDMODE_BLEND :

(((i/2)%3)==1) ? SDL_BLENDMODE_ADD : SDL_BLENDMODE_NONE );

if (ret != 0) checkFailCount2++;

ret = SDL_RenderDrawLine(renderer, 0, 0, i, 59 );

if (ret != 0) checkFailCount3++;

}

SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_SetRenderDrawColor, expected: 0, got: %i", checkFailCount1);

SDLTest_AssertCheck(checkFailCount2 == 0, "Validate results from calls to SDL_SetRenderDrawBlendMode, expected: 0, got: %i", checkFailCount2);

SDLTest_AssertCheck(checkFailCount3 == 0, "Validate results from calls to SDL_RenderDrawLine, expected: 0, got: %i", checkFailCount3);

checkFailCount1 = 0;

checkFailCount2 = 0;

checkFailCount3 = 0;

for (i=0; i<TESTRENDER_SCREEN_H; i+=2) {

ret = SDL_SetRenderDrawColor(renderer, 60+2*i, 240-2*i, 50, 3*i );

if (ret != 0) checkFailCount1++;

ret = SDL_SetRenderDrawBlendMode(renderer,(((i/2)%3)==0) ? SDL_BLENDMODE_BLEND :

(((i/2)%3)==1) ? SDL_BLENDMODE_ADD : SDL_BLENDMODE_NONE );

if (ret != 0) checkFailCount2++;

ret = SDL_RenderDrawLine(renderer, 0, 0, 79, i );

if (ret != 0) checkFailCount3++;

}

SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_SetRenderDrawColor, expected: 0, got: %i", checkFailCount1);

SDLTest_AssertCheck(checkFailCount2 == 0, "Validate results from calls to SDL_SetRenderDrawBlendMode, expected: 0, got: %i", checkFailCount2);

SDLTest_AssertCheck(checkFailCount3 == 0, "Validate results from calls to SDL_RenderDrawLine, expected: 0, got: %i", checkFailCount3);

/* Draw points. */

checkFailCount1 = 0;

checkFailCount2 = 0;

checkFailCount3 = 0;

for (j=0; j<TESTRENDER_SCREEN_H; j+=3) {

for (i=0; i<TESTRENDER_SCREEN_W; i+=3) {

ret = SDL_SetRenderDrawColor(renderer, j*4, i*3, j*4, i*3 );

if (ret != 0) checkFailCount1++;

ret = SDL_SetRenderDrawBlendMode(renderer, ((((i+j)/3)%3)==0) ? SDL_BLENDMODE_BLEND :

((((i+j)/3)%3)==1) ? SDL_BLENDMODE_ADD : SDL_BLENDMODE_NONE );

if (ret != 0) checkFailCount2++;

ret = SDL_RenderDrawPoint(renderer, i, j );

if (ret != 0) checkFailCount3++;

}

}

SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_SetRenderDrawColor, expected: 0, got: %i", checkFailCount1);

SDLTest_AssertCheck(checkFailCount2 == 0, "Validate results from calls to SDL_SetRenderDrawBlendMode, expected: 0, got: %i", checkFailCount2);

SDLTest_AssertCheck(checkFailCount3 == 0, "Validate results from calls to SDL_RenderDrawPoint, expected: 0, got: %i", checkFailCount3);

/* See if it's the same. */

referenceSurface = SDLTest_ImagePrimitivesBlend();

_compare(referenceSurface, ALLOWABLE_ERROR_BLENDED );

/* Clean up. */

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

return TEST_COMPLETED;

}

/**

* @brief Tests some blitting routines.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_RenderCopy

* http://wiki.libsdl.org/moin.cgi/SDL_DestroyTexture

*/

int

render_testBlit(void *arg)

{

int ret;

SDL_Rect rect;

SDL_Texture *tface;

SDL_Surface *referenceSurface = NULL;

Uint32 tformat;

int taccess, tw, th;

int i, j, ni, nj;

int checkFailCount1;

/* Need drawcolour or just skip test. */

SDLTest_AssertCheck(_hasDrawColor(), "_hasDrawColor)");

/* Create face surface. */

tface = _loadTestFace();

SDLTest_AssertCheck(tface != NULL, "Verify _loadTestFace() result");

if (tface == NULL) {

return TEST_ABORTED;

}

/* Constant values. */

ret = SDL_QueryTexture(tface, &tformat, &taccess, &tw, &th);

SDLTest_AssertCheck(ret == 0, "Verify result from SDL_QueryTexture, expected 0, got %i", ret);

rect.w = tw;

rect.h = th;

ni = TESTRENDER_SCREEN_W - tw;

nj = TESTRENDER_SCREEN_H - th;

/* Loop blit. */

checkFailCount1 = 0;

for (j=0; j <= nj; j+=4) {

for (i=0; i <= ni; i+=4) {

/* Blitting. */

rect.x = i;

rect.y = j;

ret = SDL_RenderCopy(renderer, tface, NULL, &rect );

if (ret != 0) checkFailCount1++;

}

}

SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_RenderCopy, expected: 0, got: %i", checkFailCount1);

/* See if it's the same */

referenceSurface = SDLTest_ImageBlit();

_compare(referenceSurface, ALLOWABLE_ERROR_OPAQUE );

/* Clean up. */

SDL_DestroyTexture( tface );

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

return TEST_COMPLETED;

}

/**

* @brief Blits doing colour tests.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetTextureColorMod

* http://wiki.libsdl.org/moin.cgi/SDL_RenderCopy

* http://wiki.libsdl.org/moin.cgi/SDL_DestroyTexture

*/

int

render_testBlitColor (void *arg)

{

int ret;

SDL_Rect rect;

SDL_Texture *tface;

SDL_Surface *referenceSurface = NULL;

Uint32 tformat;

int taccess, tw, th;

int i, j, ni, nj;

int checkFailCount1;

int checkFailCount2;

/* Create face surface. */

tface = _loadTestFace();

SDLTest_AssertCheck(tface != NULL, "Verify _loadTestFace() result");

if (tface == NULL) {

return TEST_ABORTED;

}

/* Constant values. */

ret = SDL_QueryTexture(tface, &tformat, &taccess, &tw, &th);

SDLTest_AssertCheck(ret == 0, "Verify result from SDL_QueryTexture, expected 0, got %i", ret);

rect.w = tw;

rect.h = th;

ni = TESTRENDER_SCREEN_W - tw;

nj = TESTRENDER_SCREEN_H - th;

/* Test blitting with colour mod. */

checkFailCount1 = 0;

checkFailCount2 = 0;

for (j=0; j <= nj; j+=4) {

for (i=0; i <= ni; i+=4) {

/* Set colour mod. */

ret = SDL_SetTextureColorMod( tface, (255/nj)*j, (255/ni)*i, (255/nj)*j );

if (ret != 0) checkFailCount1++;

/* Blitting. */

rect.x = i;

rect.y = j;

ret = SDL_RenderCopy(renderer, tface, NULL, &rect );

if (ret != 0) checkFailCount2++;

}

}

SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_SetTextureColorMod, expected: 0, got: %i", checkFailCount1);

SDLTest_AssertCheck(checkFailCount2 == 0, "Validate results from calls to SDL_RenderCopy, expected: 0, got: %i", checkFailCount2);

/* See if it's the same. */

referenceSurface = SDLTest_ImageBlitColor();

_compare(referenceSurface, ALLOWABLE_ERROR_OPAQUE );

/* Clean up. */

SDL_DestroyTexture( tface );

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

return TEST_COMPLETED;

}

/**

* @brief Tests blitting with alpha.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetTextureAlphaMod

* http://wiki.libsdl.org/moin.cgi/SDL_RenderCopy

* http://wiki.libsdl.org/moin.cgi/SDL_DestroyTexture

*/

int

render_testBlitAlpha (void *arg)

{

int ret;

SDL_Rect rect;

SDL_Texture *tface;

SDL_Surface *referenceSurface = NULL;

Uint32 tformat;

int taccess, tw, th;

int i, j, ni, nj;

int checkFailCount1;

int checkFailCount2;

/* Need alpha or just skip test. */

SDLTest_AssertCheck(_hasTexAlpha(), "_hasTexAlpha");

/* Create face surface. */

tface = _loadTestFace();

SDLTest_AssertCheck(tface != NULL, "Verify _loadTestFace() result");

if (tface == NULL) {

return TEST_ABORTED;

}

/* Constant values. */

ret = SDL_QueryTexture(tface, &tformat, &taccess, &tw, &th);

SDLTest_AssertCheck(ret == 0, "Verify result from SDL_QueryTexture, expected 0, got %i", ret);

rect.w = tw;

rect.h = th;

ni = TESTRENDER_SCREEN_W - tw;

nj = TESTRENDER_SCREEN_H - th;

/* Test blitting with alpha mod. */

checkFailCount1 = 0;

checkFailCount2 = 0;

for (j=0; j <= nj; j+=4) {

for (i=0; i <= ni; i+=4) {

/* Set alpha mod. */

ret = SDL_SetTextureAlphaMod( tface, (255/ni)*i );

if (ret != 0) checkFailCount1++;

/* Blitting. */

rect.x = i;

rect.y = j;

ret = SDL_RenderCopy(renderer, tface, NULL, &rect );

if (ret != 0) checkFailCount2++;

}

}

SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_SetTextureAlphaMod, expected: 0, got: %i", checkFailCount1);

SDLTest_AssertCheck(checkFailCount2 == 0, "Validate results from calls to SDL_RenderCopy, expected: 0, got: %i", checkFailCount2);

/* See if it's the same. */

referenceSurface = SDLTest_ImageBlitAlpha();

_compare(referenceSurface, ALLOWABLE_ERROR_BLENDED );

/* Clean up. */

SDL_DestroyTexture( tface );

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

return TEST_COMPLETED;

}

/* Helper functions */

/**

* @brief Tests a blend mode.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetTextureBlendMode

* http://wiki.libsdl.org/moin.cgi/SDL_RenderCopy

*/

static void

_testBlitBlendMode( SDL_Texture * tface, int mode )

{

int ret;

Uint32 tformat;

int taccess, tw, th;

int i, j, ni, nj;

SDL_Rect rect;

int checkFailCount1;

int checkFailCount2;

/* Clear surface. */

_clearScreen();

/* Constant values. */

ret = SDL_QueryTexture(tface, &tformat, &taccess, &tw, &th);

SDLTest_AssertCheck(ret == 0, "Verify result from SDL_QueryTexture, expected 0, got %i", ret);

rect.w = tw;

rect.h = th;

ni = TESTRENDER_SCREEN_W - tw;

nj = TESTRENDER_SCREEN_H - th;

/* Test blend mode. */

checkFailCount1 = 0;

checkFailCount2 = 0;

for (j=0; j <= nj; j+=4) {

for (i=0; i <= ni; i+=4) {

/* Set blend mode. */

ret = SDL_SetTextureBlendMode( tface, (SDL_BlendMode)mode );

if (ret != 0) checkFailCount1++;

/* Blitting. */

rect.x = i;

rect.y = j;

ret = SDL_RenderCopy(renderer, tface, NULL, &rect );

if (ret != 0) checkFailCount2++;

}

}

SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_SetTextureBlendMode, expected: 0, got: %i", checkFailCount1);

SDLTest_AssertCheck(checkFailCount2 == 0, "Validate results from calls to SDL_RenderCopy, expected: 0, got: %i", checkFailCount2);

}

/**

* @brief Tests some more blitting routines.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetTextureColorMod

* http://wiki.libsdl.org/moin.cgi/SDL_SetTextureAlphaMod

* http://wiki.libsdl.org/moin.cgi/SDL_SetTextureBlendMode

* http://wiki.libsdl.org/moin.cgi/SDL_DestroyTexture

*/

int

render_testBlitBlend (void *arg)

{

int ret;

SDL_Rect rect;

SDL_Texture *tface;

SDL_Surface *referenceSurface = NULL;

Uint32 tformat;

int taccess, tw, th;

int i, j, ni, nj;

int mode;

int checkFailCount1;

int checkFailCount2;

int checkFailCount3;

int checkFailCount4;

SDLTest_AssertCheck(_hasBlendModes(), "_hasBlendModes");

SDLTest_AssertCheck(_hasTexColor(), "_hasTexColor");

SDLTest_AssertCheck(_hasTexAlpha(), "_hasTexAlpha");

/* Create face surface. */

tface = _loadTestFace();

SDLTest_AssertCheck(tface != NULL, "Verify _loadTestFace() result");

if (tface == NULL) {

return TEST_ABORTED;

}

/* Constant values. */

ret = SDL_QueryTexture(tface, &tformat, &taccess, &tw, &th);

SDLTest_AssertCheck(ret == 0, "Verify result from SDL_QueryTexture, expected 0, got %i", ret);

rect.w = tw;

rect.h = th;

ni = TESTRENDER_SCREEN_W - tw;

nj = TESTRENDER_SCREEN_H - th;

/* Set alpha mod. */

ret = SDL_SetTextureAlphaMod( tface, 100 );

SDLTest_AssertCheck(ret == 0, "Validate result from SDL_SetTextureAlphaMod, expected: 0, got: %i", ret);

/* Test None. */

_testBlitBlendMode( tface, SDL_BLENDMODE_NONE );

referenceSurface = SDLTest_ImageBlitBlendNone();

_compare(referenceSurface, ALLOWABLE_ERROR_OPAQUE );

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

/* Test Blend. */

_testBlitBlendMode( tface, SDL_BLENDMODE_BLEND );

referenceSurface = SDLTest_ImageBlitBlend();

_compare(referenceSurface, ALLOWABLE_ERROR_BLENDED );

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

/* Test Add. */

_testBlitBlendMode( tface, SDL_BLENDMODE_ADD );

referenceSurface = SDLTest_ImageBlitBlendAdd();

_compare(referenceSurface, ALLOWABLE_ERROR_BLENDED );

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

/* Test Mod. */

_testBlitBlendMode( tface, SDL_BLENDMODE_MOD);

referenceSurface = SDLTest_ImageBlitBlendMod();

_compare(referenceSurface, ALLOWABLE_ERROR_BLENDED );

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

/* Clear surface. */

_clearScreen();

/* Loop blit. */

checkFailCount1 = 0;

checkFailCount2 = 0;

checkFailCount3 = 0;

checkFailCount4 = 0;

for (j=0; j <= nj; j+=4) {

for (i=0; i <= ni; i+=4) {

/* Set colour mod. */

ret = SDL_SetTextureColorMod( tface, (255/nj)*j, (255/ni)*i, (255/nj)*j );

if (ret != 0) checkFailCount1++;

/* Set alpha mod. */

ret = SDL_SetTextureAlphaMod( tface, (100/ni)*i );

if (ret != 0) checkFailCount2++;

/* Crazy blending mode magic. */

mode = (i/4*j/4) % 4;

if (mode==0) mode = SDL_BLENDMODE_NONE;

else if (mode==1) mode = SDL_BLENDMODE_BLEND;

else if (mode==2) mode = SDL_BLENDMODE_ADD;

else if (mode==3) mode = SDL_BLENDMODE_MOD;

ret = SDL_SetTextureBlendMode( tface, (SDL_BlendMode)mode );

if (ret != 0) checkFailCount3++;

/* Blitting. */

rect.x = i;

rect.y = j;

ret = SDL_RenderCopy(renderer, tface, NULL, &rect );

if (ret != 0) checkFailCount4++;

}

}

SDLTest_AssertCheck(checkFailCount1 == 0, "Validate results from calls to SDL_SetTextureColorMod, expected: 0, got: %i", checkFailCount1);

SDLTest_AssertCheck(checkFailCount2 == 0, "Validate results from calls to SDL_SetTextureAlphaMod, expected: 0, got: %i", checkFailCount2);

SDLTest_AssertCheck(checkFailCount3 == 0, "Validate results from calls to SDL_SetTextureBlendMode, expected: 0, got: %i", checkFailCount3);

SDLTest_AssertCheck(checkFailCount4 == 0, "Validate results from calls to SDL_RenderCopy, expected: 0, got: %i", checkFailCount4);

/* Clean up. */

SDL_DestroyTexture( tface );

/* Check to see if final image matches. */

referenceSurface = SDLTest_ImageBlitBlendAll();

_compare(referenceSurface, ALLOWABLE_ERROR_BLENDED);

if (referenceSurface != NULL) {

SDL_FreeSurface(referenceSurface);

referenceSurface = NULL;

}

return TEST_COMPLETED;

}

/**

* @brief Checks to see if functionality is supported. Helper function.

*/

static int

_isSupported( int code )

{

return (code == 0);

}

/**

* @brief Test to see if we can vary the draw colour. Helper function.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetRenderDrawColor

* http://wiki.libsdl.org/moin.cgi/SDL_GetRenderDrawColor

*/

static int

_hasDrawColor (void)

{

int ret, fail;

Uint8 r, g, b, a;

fail = 0;

/* Set colour. */

ret = SDL_SetRenderDrawColor(renderer, 100, 100, 100, 100 );

if (!_isSupported(ret))

fail = 1;

ret = SDL_GetRenderDrawColor(renderer, &r, &g, &b, &a );

if (!_isSupported(ret))

fail = 1;

/* Restore natural. */

ret = SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE );

if (!_isSupported(ret))

fail = 1;

/* Something failed, consider not available. */

if (fail)

return 0;

/* Not set properly, consider failed. */

else if ((r != 100) || (g != 100) || (b != 100) || (a != 100))

return 0;

return 1;

}

/**

* @brief Test to see if we can vary the blend mode. Helper function.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetRenderDrawBlendMode

* http://wiki.libsdl.org/moin.cgi/SDL_GetRenderDrawBlendMode

*/

static int

_hasBlendModes (void)

{

int fail;

int ret;

SDL_BlendMode mode;

fail = 0;

ret = SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND );

if (!_isSupported(ret))

fail = 1;

ret = SDL_GetRenderDrawBlendMode(renderer, &mode );

if (!_isSupported(ret))

fail = 1;

ret = (mode != SDL_BLENDMODE_BLEND);

if (!_isSupported(ret))

fail = 1;

ret = SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_ADD );

if (!_isSupported(ret))

fail = 1;

ret = SDL_GetRenderDrawBlendMode(renderer, &mode );

if (!_isSupported(ret))

fail = 1;

ret = (mode != SDL_BLENDMODE_ADD);

if (!_isSupported(ret))

fail = 1;

ret = SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_MOD );

if (!_isSupported(ret))

fail = 1;

ret = SDL_GetRenderDrawBlendMode(renderer, &mode );

if (!_isSupported(ret))

fail = 1;

ret = (mode != SDL_BLENDMODE_MOD);

if (!_isSupported(ret))

fail = 1;

ret = SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_NONE );

if (!_isSupported(ret))

fail = 1;

ret = SDL_GetRenderDrawBlendMode(renderer, &mode );

if (!_isSupported(ret))

fail = 1;

ret = (mode != SDL_BLENDMODE_NONE);

if (!_isSupported(ret))

fail = 1;

return !fail;

}

/**

* @brief Loads the test image 'Face' as texture. Helper function.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_CreateTextureFromSurface

*/

static SDL_Texture *

_loadTestFace(void)

{

SDL_Surface *face;

SDL_Texture *tface;

face = SDLTest_ImageFace();

if (face == NULL) {

return NULL;

}

tface = SDL_CreateTextureFromSurface(renderer, face);

if (tface == NULL) {

SDLTest_LogError("SDL_CreateTextureFromSurface() failed with error: %s", SDL_GetError());

}

SDL_FreeSurface(face);

return tface;

}

/**

* @brief Test to see if can set texture colour mode. Helper function.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetTextureColorMod

* http://wiki.libsdl.org/moin.cgi/SDL_GetTextureColorMod

* http://wiki.libsdl.org/moin.cgi/SDL_DestroyTexture

*/

static int

_hasTexColor (void)

{

int fail;

int ret;

SDL_Texture *tface;

Uint8 r, g, b;

/* Get test face. */

tface = _loadTestFace();

if (tface == NULL)

return 0;

/* See if supported. */

fail = 0;

ret = SDL_SetTextureColorMod( tface, 100, 100, 100 );

if (!_isSupported(ret))

fail = 1;

ret = SDL_GetTextureColorMod( tface, &r, &g, &b );

if (!_isSupported(ret))

fail = 1;

/* Clean up. */

SDL_DestroyTexture( tface );

if (fail)

return 0;

else if ((r != 100) || (g != 100) || (b != 100))

return 0;

return 1;

}

/**

* @brief Test to see if we can vary the alpha of the texture. Helper function.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_SetTextureAlphaMod

* http://wiki.libsdl.org/moin.cgi/SDL_GetTextureAlphaMod

* http://wiki.libsdl.org/moin.cgi/SDL_DestroyTexture

*/

static int

_hasTexAlpha(void)

{

int fail;

int ret;

SDL_Texture *tface;

Uint8 a;

/* Get test face. */

tface = _loadTestFace();

if (tface == NULL)

return 0;

/* See if supported. */

fail = 0;

ret = SDL_SetTextureAlphaMod( tface, 100 );

if (!_isSupported(ret))

fail = 1;

ret = SDL_GetTextureAlphaMod( tface, &a );

if (!_isSupported(ret))

fail = 1;

/* Clean up. */

SDL_DestroyTexture( tface );

if (fail)

return 0;

else if (a != 100)

return 0;

return 1;

}

/**

* @brief Compares screen pixels with image pixels. Helper function.

*

* @param msg Message on failure.

* @param s Image to compare against.

* @return 0 on success.

*

* \sa

* http://wiki.libsdl.org/moin.cgi/SDL_RenderReadPixels

* http://wiki.libsdl.org/moin.cgi/SDL_CreateRGBSurfaceFrom

* http://wiki.libsdl.org/moin.cgi/SDL_FreeSurface

*/

static void

_compare(SDL_Surface *referenceSurface, int allowable_error)

{

int result;

SDL_Rect rect;

Uint8 *pixels;

SDL_Surface *testSurface;

/* Read pixels. */

pixels = (Uint8 *)SDL_malloc(4*TESTRENDER_SCREEN_W*TESTRENDER_SCREEN_H);

SDLTest_AssertCheck(pixels != NULL, "Validate allocated temp pixel buffer");

if (pixels == NULL) return;

/* Explicitly specify the rect in case the window isn't the expected size... */

rect.x = 0;

rect.y = 0;

rect.w = TESTRENDER_SCREEN_W;

rect.h = TESTRENDER_SCREEN_H;

result = SDL_RenderReadPixels(renderer, &rect, RENDER_COMPARE_FORMAT, pixels, 80*4 );

SDLTest_AssertCheck(result == 0, "Validate result from SDL_RenderReadPixels, expected: 0, got: %i", result);

/* Create surface. */

testSurface = SDL_CreateRGBSurfaceFrom(pixels, TESTRENDER_SCREEN_W, TESTRENDER_SCREEN_H, 32, TESTRENDER_SCREEN_W*4,

RENDER_COMPARE_RMASK, RENDER_COMPARE_GMASK, RENDER_COMPARE_BMASK, RENDER_COMPARE_AMASK);

SDLTest_AssertCheck(testSurface != NULL, "Verify result from SDL_CreateRGBSurfaceFrom is not NULL");

/* Compare surface. */

result = SDLTest_CompareSurfaces( testSurface, referenceSurface, allowable_error );

SDLTest_AssertCheck(result == 0, "Validate result from SDLTest_CompareSurfaces, expected: 0, got: %i", result);

/* Clean up. */

if (pixels != NULL) {