Rewrote test program for shaped windows. It definitely displays recognizable pictures now, but the resizing and shaping functionality isn't behaving correctly, possibly due to a miscalculation of alpha values.
--- a/src/video/SDL_shape.c Sun Jul 18 15:15:05 2010 -0400
+++ b/src/video/SDL_shape.c Sun Jul 18 21:31:22 2010 -0400
@@ -63,14 +63,17 @@
Uint32 bitmap_pixel;
if(SDL_MUSTLOCK(shape))
SDL_LockSurface(shape);
- for(x = 0;x<shape->w;x++)
- for(y = 0;y<shape->h;y++) {
- pixel = (Uint8 *)(shape->pixels) + (y*shape->pitch) + (x*shape->format->BytesPerPixel);
+ pixel = (Uint8*)shape->pixels;
+ for(y = 0;y<shape->h;y++) {
+ pixel = (Uint8 *)(shape->pixels) + y * shape->pitch;
+ for(x=0;x<shape->w;x++) {
alpha = 0;
SDL_GetRGBA(*(Uint32*)pixel,shape->format,&r,&g,&b,&alpha);
bitmap_pixel = y*shape->w + x;
bitmap[bitmap_pixel / ppb] |= (alpha >= alphacutoff ? value : 0) << ((ppb - 1) - (bitmap_pixel % ppb));
+ pixel += shape->format->BytesPerPixel;
}
+ }
if(SDL_MUSTLOCK(shape))
SDL_UnlockSurface(shape);
}
--- a/test/Makefile.in Sun Jul 18 15:15:05 2010 -0400
+++ b/test/Makefile.in Sun Jul 18 21:31:22 2010 -0400
@@ -7,7 +7,7 @@
CFLAGS = @CFLAGS@
LIBS = @LIBS@
-TARGETS = checkkeys$(EXE) graywin$(EXE) loopwave$(EXE) testalpha$(EXE) testatomic$(EXE) testaudioinfo$(EXE) testbitmap$(EXE) testblitspeed$(EXE) testcursor$(EXE) testdraw2$(EXE) testdyngles$(EXE) testdyngl$(EXE) testerror$(EXE) testeyes$(EXE) testfile$(EXE) testfill$(EXE) testgamma$(EXE) testgl2$(EXE) testgles$(EXE) testgl$(EXE) testhaptic$(EXE) testhread$(EXE) testiconv$(EXE) testime$(EXE) testintersections$(EXE) testjoystick$(EXE) testkeys$(EXE) testloadso$(EXE) testlock$(EXE) testmmousetablet$(EXE) testmultiaudio$(EXE) testoverlay2$(EXE) testoverlay$(EXE) testpalette$(EXE) testplatform$(EXE) testpower$(EXE) testresample$(EXE) testsem$(EXE) testsprite2$(EXE) testsprite$(EXE) testspriteminimal$(EXE) testtimer$(EXE) testver$(EXE) testvidinfo$(EXE) testwin$(EXE) testwm2$(EXE) testwm$(EXE) threadwin$(EXE) torturethread$(EXE)
+TARGETS = checkkeys$(EXE) graywin$(EXE) loopwave$(EXE) testalpha$(EXE) testatomic$(EXE) testaudioinfo$(EXE) testbitmap$(EXE) testblitspeed$(EXE) testcursor$(EXE) testdraw2$(EXE) testdyngles$(EXE) testdyngl$(EXE) testerror$(EXE) testfile$(EXE) testfill$(EXE) testgamma$(EXE) testgl2$(EXE) testgles$(EXE) testgl$(EXE) testhaptic$(EXE) testhread$(EXE) testiconv$(EXE) testime$(EXE) testintersections$(EXE) testjoystick$(EXE) testkeys$(EXE) testloadso$(EXE) testlock$(EXE) testmmousetablet$(EXE) testmultiaudio$(EXE) testoverlay2$(EXE) testoverlay$(EXE) testpalette$(EXE) testplatform$(EXE) testpower$(EXE) testresample$(EXE) testsem$(EXE) testshape$(EXE) testsprite2$(EXE) testsprite$(EXE) testspriteminimal$(EXE) testtimer$(EXE) testver$(EXE) testvidinfo$(EXE) testwin$(EXE) testwm2$(EXE) testwm$(EXE) threadwin$(EXE) torturethread$(EXE)
all: Makefile $(TARGETS)
@@ -62,9 +62,6 @@
testerror$(EXE): $(srcdir)/testerror.c
$(CC) -o $@ $? $(CFLAGS) $(LIBS)
-testeyes$(EXE): $(srcdir)/testeyes.c
- $(CC) -o $@ $? -std=c99 $(CFLAGS) $(LIBS)
-
testfile$(EXE): $(srcdir)/testfile.c
$(CC) -o $@ $? $(CFLAGS) $(LIBS)
@@ -113,6 +110,9 @@
testsem$(EXE): $(srcdir)/testsem.c
$(CC) -o $@ $? $(CFLAGS) $(LIBS)
+testshape$(EXE): $(srcdir)/testshape.c
+ $(CC) -o $@ $? -std=c99 $(CFLAGS) $(LIBS)
+
testspriteminimal$(EXE): $(srcdir)/testspriteminimal.c
$(CC) -o $@ $? $(CFLAGS) $(LIBS) @MATHLIB@
--- a/test/README Sun Jul 18 15:15:05 2010 -0400
+++ b/test/README Sun Jul 18 21:31:22 2010 -0400
@@ -12,7 +12,6 @@
testcursor Tests custom mouse cursor
testdyngl Tests dynamically loading OpenGL library
testerror Tests multi-threaded error handling
- testeyes Tests shaped windows
testfile Tests RWops layer
testgamma Tests video device gamma ramp
testgl A very simple example of using OpenGL with SDL
@@ -29,6 +28,7 @@
testpalette Tests palette color cycling
testplatform Tests types, endianness and cpu capabilities
testsem Tests SDL's semaphore implementation
+ testshape Tests shaped windows
testsprite Example of fast sprite movement on the screen
testsprite2 Improved version of testsprite
testtimer Test the timer facilities
--- a/test/testeyes.c Sun Jul 18 15:15:05 2010 -0400
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,232 +0,0 @@
-#include <stdlib.h>
-#include <math.h>
-#include <SDL_events.h>
-#include <SDL_rect.h>
-#include <SDL_pixels.h>
-#include <SDL_video.h>
-#include <SDL_shape.h>
-#include "testeyes_bitmap.h"
-#include "testeyes_mask_bitmap.h"
-
-/* The following code for the calculation of pupil positions has been taken and rewritten from the original xeyes. The
- copyright notice is included as follows, and the code is now under the same license as the rest of this file. */
-/*
-
-Copyright (c) 1991 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be included
-in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of the X Consortium shall
-not be used in advertising or otherwise to promote the sale, use or
-other dealings in this Software without prior written authorization
-from the X Consortium.
-
-*/
-# define NUM_EYES 2
-# define EYE_X(n) ((n) * 2.0)
-# define EYE_Y(n) (0.0)
-# define EYE_THICK (0.175) /* thickness of eye rim */
-# define EYE_OFFSET (0.1) /* padding between eyes */
-# define EYE_WIDTH (2.0 - (EYE_THICK + EYE_OFFSET) * 2)
-# define EYE_HEIGHT EYE_WIDTH
-# define EYE_HWIDTH (EYE_WIDTH / 2.0)
-# define EYE_HHEIGHT (EYE_HEIGHT / 2.0)
-# define BALL_WIDTH (0.3)
-# define BALL_HEIGHT BALL_WIDTH
-# define BALL_PAD (0.05)
-# define BALL_DIST ((EYE_WIDTH - BALL_WIDTH) / 2.0 - BALL_PAD)
-
-SDL_Point computePupil (int num,SDL_Point mouse) {
- double dx = mouse.x - EYE_X(num);
- double dy = mouse.y - EYE_Y(num);
- double cx = 0.0,cy = 0.0;
- if(dx == 0 && dy == 0) {
- cx = EYE_X(num);
- cy = EYE_Y(num);
- }
- else {
- double angle = atan2((double)dy,(double)dx);
- double cosa = cos(angle);
- double sina = sin(angle);
- double hypotenuse = hypot(EYE_HHEIGHT * cosa, EYE_HWIDTH * sina);
- double dist = BALL_DIST * hypot((EYE_HWIDTH * EYE_HHEIGHT) * cosa / hypotenuse,
- (EYE_HWIDTH * EYE_HHEIGHT) * sina / hypotenuse);
- if(dist > hypot((double)dx,(double)dy)) {
- cx = dx + EYE_X(num);
- cy = dy + EYE_Y(num);
- }
- else {
- cx = dist * cosa + EYE_X(num);
- cy = dist * sina + EYE_Y(num);
- }
- }
- SDL_Point ret = {cx,cy};
- return ret;
-}
-
-/* Here begins the code exclusively and entirely written by Eli Gottlieb in May 2010. */
-typedef struct {
- SDL_Rect left;
- SDL_Rect right;
-} Pupil_Pair;
-typedef struct {
- SDL_Point left;
- SDL_Point right;
-} Pupil_Points;
-
-Pupil_Pair compute_pupil_positions(SDL_Point target) {
- Pupil_Pair result;
- Pupil_Points points;
- points.left = computePupil(0,target);
- points.right = computePupil(1,target);
- result.left.x = points.left.x - BALL_WIDTH / 2.0;
- result.left.y = points.left.y - BALL_HEIGHT / 2.0;
- result.right.x = points.right.x - BALL_WIDTH / 2.0;
- result.right.y = points.right.y - BALL_HEIGHT / 2.0;
- result.left.w = result.right.w = BALL_WIDTH;
- result.left.h = result.left.w = BALL_HEIGHT;
- return result;
-}
-
-void render_eyes(SDL_Window *window,SDL_Texture *eyes_texture,Pupil_Pair pupils) {
- SDL_SelectRenderer(window);
-
- //Clear render-target to blue.
- SDL_SetRenderDrawColor(0x00,0x00,0xff,0xff);
- SDL_RenderClear();
-
- //Render the whites of the eyes.
- SDL_Rect srcdestrect = {0,0,eyes_width,eyes_height};
- SDL_RenderCopy(eyes_texture,&srcdestrect,&srcdestrect);
-
- //Render the pupils.
- SDL_SetRenderDrawColor(0x00,0x00,0x00,0xff);
- const SDL_Rect eyes[2] = {pupils.left,pupils.right};
- SDL_RenderFillRects((const SDL_Rect**)&eyes,2);
-
- SDL_RenderPresent();
-}
-
-int main(int argc,char** argv) {
- if(SDL_VideoInit(NULL,0) == -1) {
- printf("Could not initialize SDL video.\n");
- exit(-1);
- }
-
- SDL_Window *window = SDL_CreateShapedWindow("Big Brother is watching you.",eyes_x_hot,eyes_y_hot,eyes_width,eyes_height,SDL_WINDOW_RESIZABLE | SDL_WINDOW_SHOWN);
- if(window == NULL) {
- SDL_VideoQuit();
- printf("Could not create shaped window for eyes.\n");
- exit(-2);
- }
- if(SDL_CreateRenderer(window,-1,SDL_RENDERER_PRESENTFLIP2) == -1) {
- SDL_DestroyWindow(window);
- SDL_VideoQuit();
- printf("Could not create rendering context for SDL_Eyes window.\n");
- exit(-3);
- }
-
- int bpp = 0;
- Uint32 r = 0,g = 0,b = 0,a = 0;
- SDL_PixelFormatEnumToMasks(SDL_PIXELFORMAT_ARGB4444,&bpp,&r,&g,&b,&a);
- SDL_Surface *eyes = SDL_CreateRGBSurface(0,eyes_width,eyes_height,bpp,r,g,b,a);
- if(eyes == NULL) {
- SDL_DestroyRenderer(window);
- SDL_DestroyWindow(window);
- SDL_VideoQuit();
- printf("Could not create eyes surface.\n");
- exit(-4);
- }
-
- void *pixels = NULL;
- int pitch = 0;
- SDL_Rect rect = {0,0,eyes_width,eyes_height};
- if(SDL_MUSTLOCK(eyes))
- SDL_LockSurface(eyes);
- pixels = eyes->pixels;
- pitch = eyes->pitch;
- for(int y=0;y<eyes_height;y++)
- for(int x=0;x<eyes_width;x++) {
- Uint8 brightness = *(Uint8*)(eyes_bits+(eyes_width/8)*y+(x/8)) & (1 << (7 - x % 8)) ? 255 : 0;
- *(Uint16*)(pixels+pitch*y+x*16/8) = SDL_MapRGBA(eyes->format,brightness,brightness,brightness,255);
- }
- if(SDL_MUSTLOCK(eyes))
- SDL_UnlockSurface(eyes);
- SDL_Texture *eyes_texture = SDL_CreateTextureFromSurface(0,eyes);
- if(eyes_texture == NULL) {
- SDL_FreeSurface(eyes);
- SDL_DestroyRenderer(window);
- SDL_DestroyWindow(window);
- SDL_VideoQuit();
- printf("Could not create eyes texture.\n");
- exit(-5);
- }
-
- SDL_PixelFormatEnumToMasks(SDL_PIXELFORMAT_ARGB4444,&bpp,&r,&g,&b,&a);
- SDL_Surface *mask = SDL_CreateRGBSurface(0,eyesmask_width,eyesmask_height,bpp,r,g,b,a);
- if(mask == NULL) {
- SDL_DestroyTexture(eyes_texture);
- SDL_FreeSurface(eyes);
- SDL_DestroyRenderer(window);
- SDL_DestroyWindow(window);
- SDL_VideoQuit();
- printf("Could not create shape mask texture.\n");
- exit(-5);
- }
-
- if(SDL_MUSTLOCK(mask))
- SDL_LockSurface(mask);
- pixels = mask->pixels;
- pitch = mask->pitch;
- for(int y=0;y<eyesmask_height;y++)
- for(int x=0;x<eyesmask_width;x++) {
- Uint8 alpha = *(Uint8*)(eyesmask_bits+(eyesmask_width/8)*y+(x/8)) & (1 << (7 - x % 8)) ? 1 : 0;
- *(Uint16*)(pixels+pitch*y+x*bpp/8) = SDL_MapRGBA(mask->format,0,0,0,alpha);
- }
- if(SDL_MUSTLOCK(mask))
- SDL_UnlockSurface(mask);
-
- SDL_WindowShapeMode mode = {ShapeModeDefault,1};
- SDL_SetWindowShape(window,mask,&mode);
-
- SDL_Event event;
- int event_pending = 0;
- event_pending = SDL_PollEvent(&event);
- SDL_Point mouse_position;
- Pupil_Pair pupil_positions;
- SDL_SelectMouse(0);
- SDL_GetMouseState(&mouse_position.x,&mouse_position.y);
- pupil_positions = compute_pupil_positions(mouse_position);
- while(event.type != SDL_QUIT) {
- if(event.type == SDL_MOUSEMOTION) {
- mouse_position.x = event.motion.x;
- mouse_position.y = event.motion.y;
- pupil_positions = compute_pupil_positions(mouse_position);
- }
- render_eyes(window,eyes_texture,pupil_positions);
- event_pending = SDL_PollEvent(&event);
- }
-
- SDL_FreeSurface(mask);
- SDL_DestroyTexture(eyes_texture);
- SDL_DestroyWindow(window);
- //Call SDL_VideoQuit() before quitting.
- SDL_VideoQuit();
-}
--- a/test/testeyes_bitmap.h Sun Jul 18 15:15:05 2010 -0400
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,21 +0,0 @@
-#define eyes_width 48
-#define eyes_height 32
-#define eyes_x_hot 0
-#define eyes_y_hot 0
-static unsigned char eyes_bits[] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x78, 0x00, 0x00, 0x1e, 0x00, 0x00, 0xfe, 0x01, 0x80, 0x7f, 0x00,
- 0x00, 0x87, 0x03, 0xc0, 0xe1, 0x00, 0x80, 0x01, 0x06, 0x60, 0x80, 0x01,
- 0xc0, 0x00, 0x0c, 0x30, 0x00, 0x03, 0x60, 0x00, 0x18, 0x18, 0x00, 0x06,
- 0x30, 0x00, 0x30, 0x0c, 0x00, 0x0c, 0x30, 0x00, 0x30, 0x0c, 0x00, 0x0c,
- 0x10, 0x00, 0x20, 0x04, 0x00, 0x08, 0x18, 0x00, 0x60, 0x06, 0x00, 0x18,
- 0x18, 0x00, 0x60, 0x06, 0x00, 0x18, 0x18, 0x00, 0x60, 0x06, 0x00, 0x18,
- 0x18, 0x00, 0x60, 0x06, 0x00, 0x18, 0x18, 0x00, 0x60, 0x06, 0x00, 0x18,
- 0x18, 0x00, 0x60, 0x06, 0x00, 0x18, 0x18, 0x80, 0x63, 0x06, 0x00, 0x18,
- 0x18, 0x80, 0x63, 0x06, 0xe0, 0x18, 0x18, 0x80, 0x63, 0x06, 0xe0, 0x18,
- 0x18, 0x00, 0x60, 0x06, 0xe0, 0x18, 0x18, 0x00, 0x20, 0x06, 0x00, 0x08,
- 0x10, 0x00, 0x30, 0x04, 0x00, 0x0c, 0x10, 0x00, 0x10, 0x04, 0x00, 0x04,
- 0x30, 0x00, 0x18, 0x0c, 0x00, 0x06, 0x60, 0x00, 0x08, 0x18, 0x00, 0x02,
- 0x40, 0x00, 0x0c, 0x10, 0x00, 0x03, 0xc0, 0x00, 0x06, 0x30, 0x80, 0x01,
- 0x80, 0x83, 0x03, 0xe0, 0xe0, 0x00, 0x00, 0xff, 0x01, 0xc0, 0x7f, 0x00,
- 0x00, 0xfe, 0x00, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
--- a/test/testeyes_mask_bitmap.h Sun Jul 18 15:15:05 2010 -0400
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,21 +0,0 @@
-#define eyesmask_width 48
-#define eyesmask_height 32
-#define eyesmask_x_hot 0
-#define eyesmask_y_hot 0
-static unsigned char eyesmask_bits[] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x78, 0x00, 0x00, 0x1e, 0x00, 0x00, 0xfe, 0x01, 0x80, 0x7f, 0x00,
- 0x00, 0xff, 0x03, 0xc0, 0xff, 0x00, 0x80, 0xff, 0x07, 0xe0, 0xff, 0x01,
- 0xc0, 0xff, 0x0f, 0xf0, 0xff, 0x03, 0xe0, 0xff, 0x1f, 0xf8, 0xff, 0x07,
- 0xf0, 0xff, 0x3f, 0xfc, 0xff, 0x0f, 0xf0, 0xff, 0x3f, 0xfc, 0xff, 0x0f,
- 0xf0, 0xff, 0x3f, 0xfc, 0xff, 0x0f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f,
- 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f,
- 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f,
- 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f,
- 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f,
- 0xf8, 0xff, 0x7f, 0xfe, 0xff, 0x1f, 0xf8, 0xff, 0x3f, 0xfe, 0xff, 0x0f,
- 0xf0, 0xff, 0x3f, 0xfc, 0xff, 0x0f, 0xf0, 0xff, 0x1f, 0xfc, 0xff, 0x07,
- 0xf0, 0xff, 0x1f, 0xfc, 0xff, 0x07, 0xe0, 0xff, 0x0f, 0xf8, 0xff, 0x03,
- 0xc0, 0xff, 0x0f, 0xf0, 0xff, 0x03, 0xc0, 0xff, 0x07, 0xf0, 0xff, 0x01,
- 0x80, 0xff, 0x03, 0xe0, 0xff, 0x00, 0x00, 0xff, 0x01, 0xc0, 0x7f, 0x00,
- 0x00, 0xfe, 0x00, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/testshape.c Sun Jul 18 21:31:22 2010 -0400
@@ -0,0 +1,168 @@
+#include <stdlib.h>
+#include <math.h>
+#include <SDL_events.h>
+#include <SDL_rect.h>
+#include <SDL_pixels.h>
+#include <SDL_video.h>
+#include <SDL_shape.h>
+
+#define SHAPED_WINDOW_X 150
+#define SHAPED_WINDOW_Y 150
+#define SHAPED_WINDOW_DIMENSION 640
+
+int main(int argc,char** argv) {
+ if(argc < 2) {
+ printf("SDL_Shape requires at least one bitmap file as argument.\n");
+ exit(-1);
+ }
+
+ if(SDL_VideoInit(NULL,0) == -1) {
+ printf("Could not initialize SDL video.\n");
+ exit(-2);
+ }
+
+ Uint8 num_pictures = argc - 1;
+ SDL_Surface **pictures = malloc(sizeof(SDL_Surface*)*num_pictures);
+ int i = 0;
+ for(i=0;i<num_pictures;i++)
+ pictures[i] = NULL;
+ for(i=0;i<num_pictures;i++) {
+ SDL_Surface *original = SDL_LoadBMP(argv[i+1]);
+ if(original == NULL) {
+ int j = 0;
+ for(j=0;j<num_pictures;j++)
+ if(pictures[j] != NULL)
+ SDL_FreeSurface(pictures[j]);
+ free(pictures);
+ SDL_VideoQuit();
+ printf("Could not load surface from named bitmap file.\n");
+ exit(-3);
+ }
+ //THIS CONVERSION ROUTINE IS FRAGILE! It relies in the fact that only certain portions of the format structure must be filled in to use it.
+ SDL_PixelFormat format = {NULL,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+ SDL_PixelFormatEnumToMasks(SDL_PIXELFORMAT_RGBA8888,&format.BitsPerPixel,&format.Rmask,&format.Gmask,&format.Bmask,&format.Amask);
+ format.BytesPerPixel = format.BitsPerPixel / 8 + (format.BitsPerPixel % 8 > 0 ? 1 : 0);
+ pictures[i] = SDL_ConvertSurface(original,&format,0);
+ //We have no more need of the original now that we have our desired format.
+ SDL_FreeSurface(original);
+ if(pictures[i] == NULL) {
+ int j = 0;
+ for(j=0;j<num_pictures;j++)
+ if(pictures[j] != NULL)
+ SDL_FreeSurface(pictures[j]);
+ free(pictures);
+ SDL_VideoQuit();
+ printf("Could not convert bitmap surface to desired format.\n");
+ exit(-3);
+ }
+
+ if(SDL_MUSTLOCK(pictures[i]))
+ SDL_LockSurface(pictures[i]);
+
+ void* pixels = pictures[i]->pixels;
+ unsigned int pitch = pictures[i]->pitch;
+ int y =0,x = 0;
+ for(y=0;y<pictures[i]->h;y++)
+ for(x=0;x<pictures[i]->w;x++) {
+ Uint32* pixel = pixels+y*pitch+x*pictures[i]->format->BytesPerPixel;
+ Uint8 r = 0,g = 0,b = 0;
+ SDL_GetRGB(*pixel,pictures[i]->format,&r,&g,&b);
+ if(r == g == b == 0x00)
+ *pixel = SDL_MapRGBA(pictures[i]->format,r,g,b,0);
+ }
+
+ if(SDL_MUSTLOCK(pictures[i]))
+ SDL_UnlockSurface(pictures[i]);
+ }
+
+ SDL_Window *window = SDL_CreateShapedWindow("SDL_Shape test",SHAPED_WINDOW_X,SHAPED_WINDOW_Y,SHAPED_WINDOW_DIMENSION,SHAPED_WINDOW_DIMENSION,SDL_WINDOW_RESIZABLE | SDL_WINDOW_SHOWN);
+ if(window == NULL) {
+ for(i=0;i<num_pictures;i++)
+ SDL_FreeSurface(pictures[i]);
+ free(pictures);
+ SDL_VideoQuit();
+ printf("Could not create shaped window for SDL_Shape.\n");
+ exit(-4);
+ }
+ if(SDL_CreateRenderer(window,-1,SDL_RENDERER_PRESENTFLIP2) == -1) {
+ SDL_DestroyWindow(window);
+ for(i=0;i<num_pictures;i++)
+ SDL_FreeSurface(pictures[i]);
+ free(pictures);
+ SDL_VideoQuit();
+ printf("Could not create rendering context for SDL_Shape window.\n");
+ exit(-5);
+ }
+
+ SDL_Texture **textures = malloc(sizeof(SDL_Texture*)*num_pictures);
+ for(i=0;i<num_pictures;i++)
+ textures[i] = NULL;
+ for(i=0;i<num_pictures;i++) {
+ textures[i] = SDL_CreateTextureFromSurface(0,pictures[i]);
+ if(textures[i] == NULL) {
+ int j = 0;
+ for(j=0;j<num_pictures;i++)
+ if(textures[i] != NULL)
+ SDL_DestroyTexture(textures[i]);
+ free(textures);
+ for(i=0;i<num_pictures;i++)
+ SDL_FreeSurface(pictures[i]);
+ free(pictures);
+ SDL_DestroyRenderer(window);
+ SDL_DestroyWindow(window);
+ SDL_VideoQuit();
+ printf("Could not create texture for SDL_shape.\n");
+ exit(-6);
+ }
+ }
+
+ SDL_Event event;
+ int event_pending = 0;
+ event_pending = SDL_PollEvent(&event);
+ unsigned int current_picture = 0;
+ SDL_WindowShapeMode mode = {ShapeModeDefault,1};
+ SDL_SetWindowShape(window,pictures[current_picture],&mode);
+ int mouse_down = 0;
+ Uint32 format,access;
+ SDL_Rect texture_dimensions = {0,0,0,0};
+ SDL_QueryTexture(textures[current_picture],&format,&access,&texture_dimensions.w,&texture_dimensions.h);
+ SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);
+ while(event.type != SDL_QUIT) {
+ if(event.type == SDL_MOUSEBUTTONDOWN)
+ mouse_down = 1;
+ if(mouse_down && event.type == SDL_MOUSEBUTTONUP) {
+ mouse_down = 0;
+ current_picture += 1;
+ if(current_picture >= num_pictures)
+ current_picture = 0;
+ SDL_QueryTexture(textures[current_picture],&format,&access,&texture_dimensions.w,&texture_dimensions.h);
+ SDL_SetWindowSize(window,texture_dimensions.w,texture_dimensions.h);
+ SDL_SetWindowShape(window,pictures[current_picture],&mode);
+ }
+
+ SDL_SelectRenderer(window);
+
+ //Clear render-target to blue.
+ SDL_SetRenderDrawColor(0x00,0x00,0xff,0xff);
+ SDL_RenderClear();
+
+ //Render the texture.
+ SDL_RenderCopy(textures[current_picture],&texture_dimensions,&texture_dimensions);
+
+ SDL_RenderPresent();
+ event_pending = SDL_PollEvent(&event);
+ }
+
+ //Free the textures.
+ for(i=0;i<num_pictures;i++)
+ SDL_DestroyTexture(textures[i]);
+ free(textures);
+ //Destroy the window.
+ SDL_DestroyWindow(window);
+ //Free the original surfaces backing the textures.
+ for(i=0;i<num_pictures;i++)
+ SDL_FreeSurface(pictures[i]);
+ free(pictures);
+ //Call SDL_VideoQuit() before quitting.
+ SDL_VideoQuit();
+}