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Added a function to create color cursors: SDL_CreateColorCursor()

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This commit is contained in:
Sam Lantinga
2011-03-11 14:14:38 -08:00
parent 9f072787a7
commit 2d4e47a5a7
3 changed files with 84 additions and 21 deletions
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62
src/events/SDL_mouse.c
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@@ -360,24 +360,15 @@ SDL_CreateCursor(const Uint8 * data, const Uint8 * mask,
const Uint32 white = 0xFFFFFFFF;
const Uint32 transparent = 0x00000000;
if (!mouse->CreateCursor) {
SDL_SetError("Cursors are not currently supported");
return NULL;
}
/* Sanity check the hot spot */
if ((hot_x < 0) || (hot_y < 0) || (hot_x >= w) || (hot_y >= h)) {
SDL_SetError("Cursor hot spot doesn't lie within cursor");
return NULL;
}
/* Make sure the width is a multiple of 8 */
w = ((w + 7) & ~7);
/* Create the surface from a bitmap */
surface =
SDL_CreateRGBSurface(0, w, h, 32, 0x00FF0000, 0x0000FF00, 0x000000FF,
0xFF000000);
surface = SDL_CreateRGBSurface(0, w, h, 32,
0x00FF0000,
0x0000FF00,
0x000000FF,
0xFF000000);
if (!surface) {
return NULL;
}
@@ -398,13 +389,54 @@ SDL_CreateCursor(const Uint8 * data, const Uint8 * mask,
}
}
cursor = SDL_CreateColorCursor(surface, hot_x, hot_y);
SDL_FreeSurface(surface);
return cursor;
}
SDL_Cursor *
SDL_CreateColorCursor(SDL_Surface *surface, int hot_x, int hot_y)
{
SDL_Mouse *mouse = SDL_GetMouse();
SDL_Surface *temp = NULL;
SDL_Cursor *cursor;
if (!surface) {
SDL_SetError("Passed NULL cursor surface");
return NULL;
}
if (!mouse->CreateCursor) {
SDL_SetError("Cursors are not currently supported");
return NULL;
}
/* Sanity check the hot spot */
if ((hot_x < 0) || (hot_y < 0) ||
(hot_x >= surface->w) || (hot_y >= surface->h)) {
SDL_SetError("Cursor hot spot doesn't lie within cursor");
return NULL;
}
if (surface->format->format != SDL_PIXELFORMAT_ARGB8888) {
temp = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888, 0);
if (!temp) {
return NULL;
}
surface = temp;
}
cursor = mouse->CreateCursor(surface, hot_x, hot_y);
if (cursor) {
cursor->next = mouse->cursors;
mouse->cursors = cursor;
}
SDL_FreeSurface(surface);
if (temp) {
SDL_FreeSurface(temp);
}
return cursor;
}