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Added support for custom system cursors.

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This adds 3 functions to the GLFW API: glfwCreateCursor,
glfwDestroyCursor and glfwSetCursor.
This commit is contained in:
urraka 2013-12-04 10:19:22 -03:00 committed by Camilla Berglund
parent 30f86286f5
commit 40c04a7565
14 changed files with 836 additions and 12 deletions
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23
CMakeLists.txt
View File

@ -121,7 +121,7 @@ endif()
#--------------------------------------------------------------------
if (WIN32)
set(_GLFW_WIN32 1)
message(STATUS "Using Win32 for window creation")
message(STATUS "Using Win32 for window creation")
if (GLFW_USE_EGL)
set(_GLFW_EGL 1)
@ -137,7 +137,7 @@ elseif (APPLE)
message(STATUS "Using NSGL for context creation")
elseif (UNIX)
set(_GLFW_X11 1)
message(STATUS "Using X11 for window creation")
message(STATUS "Using X11 for window creation")
if (GLFW_USE_EGL)
set(_GLFW_EGL 1)
@ -250,7 +250,7 @@ if (_GLFW_X11)
# Check for Xkb (X keyboard extension)
if (NOT X11_Xkb_FOUND)
message(FATAL_ERROR "The X keyboard extension headers were not found")
endif()
endif()
list(APPEND glfw_INCLUDE_DIR ${X11_Xkb_INCLUDE_PATH})
@ -268,6 +268,15 @@ if (_GLFW_X11)
set(GLFW_PKG_LIBS "${GLFW_PKG_LIBS} -lm")
endif()
# Check for Xcursor
if (NOT X11_Xcursor_FOUND)
message(FATAL_ERROR "The Xcursor libraries and headers were not found")
endif()
list(APPEND glfw_INCLUDE_DIR ${X11_Xcursor_INCLUDE_PATH})
list(APPEND glfw_LIBRARIES ${X11_Xcursor_LIB})
set(GLFW_PKG_DEPS "${GLFW_PKG_DEPS} xcursor")
endif()
#--------------------------------------------------------------------
@ -338,7 +347,7 @@ endif()
# Use Cocoa for window creation and NSOpenGL for context creation
#--------------------------------------------------------------------
if (_GLFW_COCOA AND _GLFW_NSGL)
if (GLFW_USE_MENUBAR)
set(_GLFW_USE_MENUBAR 1)
endif()
@ -357,7 +366,7 @@ if (_GLFW_COCOA AND _GLFW_NSGL)
else()
message(STATUS "Building GLFW only for the native architecture")
endif()
# Set up library and include paths
find_library(COCOA_FRAMEWORK Cocoa)
find_library(IOKIT_FRAMEWORK IOKit)
@ -394,7 +403,7 @@ endif()
configure_file(${GLFW_SOURCE_DIR}/docs/Doxyfile.in
${GLFW_BINARY_DIR}/docs/Doxyfile @ONLY)
configure_file(${GLFW_SOURCE_DIR}/src/glfw_config.h.in
configure_file(${GLFW_SOURCE_DIR}/src/glfw_config.h.in
${GLFW_BINARY_DIR}/src/glfw_config.h @ONLY)
configure_file(${GLFW_SOURCE_DIR}/src/glfwConfig.cmake.in
@ -428,7 +437,7 @@ endif()
# The library is installed by src/CMakeLists.txt
#--------------------------------------------------------------------
if (GLFW_INSTALL)
install(DIRECTORY include/GLFW DESTINATION include
install(DIRECTORY include/GLFW DESTINATION include
FILES_MATCHING PATTERN glfw3.h PATTERN glfw3native.h)
install(FILES ${GLFW_BINARY_DIR}/src/glfwConfig.cmake

52
include/GLFW/glfw3.h
View File

@ -575,6 +575,14 @@ typedef struct GLFWmonitor GLFWmonitor;
*/
typedef struct GLFWwindow GLFWwindow;
/*! @brief Opaque cursor object.
*
* Opaque cursor object.
*
* @ingroup cursor
*/
typedef struct GLFWcursor GLFWcursor;
/*! @brief The function signature for error callbacks.
*
* This is the function signature for error callback functions.
@ -1926,6 +1934,50 @@ GLFWAPI void glfwGetCursorPos(GLFWwindow* window, double* xpos, double* ypos);
*/
GLFWAPI void glfwSetCursorPos(GLFWwindow* window, double xpos, double ypos);
/*! @brief Creates a cursor.
*
* @param[in] width The desired cursor width.
* @param[in] height The desired cursor height.
* @param[in] xhot The desired x-coordinate of the cursor hotspot.
* @param[in] yhot The desired y-coordinate of the cursor hotspot.
* @param[in] format Not used.
* @param[in] data The cursor image data in RGBA8 format, packed in rows from
* top to bottom.
*
* @return A new cursor ready to use or `NULL` if an error occurred. If you
* don't destroy the cursor by calling `glfwDestroyCursor` it will be destroyed
* automatically by `GLFW` on termination.
*
* @note This function may only be called from the main thread.
*
* @ingroup input
*/
GLFWAPI GLFWcursor* glfwCreateCursor(int width, int height, int xhot, int yhot, int format, const void* data);
/*! @brief Destroys a cursor.
*
* This function destroys a cursor previously created by a call to
* `glfwCreateCursor`. `GLFW` will destroy all cursors automatically on
* termination.
*
* @param[in] cursor The cursor to destroy.
*
* @note This function may only be called from the main thread.
*
* @ingroup input
*/
GLFWAPI void glfwDestroyCursor(GLFWcursor* cursor);
/*! @brief Sets the cursor for a given window.
*
* @param[in] window The window to set the cursor for.
* @param[in] cursor The cursor to change to, or `NULL` to switch back to the
* default system cursor.
*
* @ingroup input
*/
GLFWAPI void glfwSetCursor(GLFWwindow* window, GLFWcursor* cursor);
/*! @brief Sets the key callback.
*
* This function sets the key callback of the specific window, which is called

11
src/cocoa_platform.h
View File

@ -51,6 +51,7 @@ typedef void* id;
#define _GLFW_PLATFORM_WINDOW_STATE _GLFWwindowNS ns
#define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE _GLFWlibraryNS ns
#define _GLFW_PLATFORM_MONITOR_STATE _GLFWmonitorNS ns
#define _GLFW_PLATFORM_CURSOR_STATE _GLFWcursorNS ns
//========================================================================
@ -67,6 +68,7 @@ typedef struct _GLFWwindowNS
id delegate;
id view;
unsigned int modifierFlags;
int cursorInside;
} _GLFWwindowNS;
@ -123,6 +125,15 @@ typedef struct _GLFWmonitorNS
} _GLFWmonitorNS;
//------------------------------------------------------------------------
// Platform-specific cursor structure
//------------------------------------------------------------------------
typedef struct _GLFWcursorNS
{
id handle;
} _GLFWcursorNS;
//========================================================================
// Prototypes for platform specific internal functions
//========================================================================

64
src/cocoa_window.m
View File

@ -44,7 +44,12 @@ static void centerCursor(_GLFWwindow *window)
static void setModeCursor(_GLFWwindow* window)
{
if (window->cursorMode == GLFW_CURSOR_NORMAL)
[[NSCursor arrowCursor] set];
{
if (window->cursor)
[(NSCursor*) window->cursor->ns.handle set];
else
[[NSCursor arrowCursor] set];
}
else
[(NSCursor*) _glfw.ns.cursor set];
}
@ -556,11 +561,13 @@ static int translateKey(unsigned int key)
- (void)mouseExited:(NSEvent *)event
{
window->ns.cursorInside = GL_FALSE;
_glfwInputCursorEnter(window, GL_FALSE);
}
- (void)mouseEntered:(NSEvent *)event
{
window->ns.cursorInside = GL_TRUE;
_glfwInputCursorEnter(window, GL_TRUE);
}
@ -1194,6 +1201,61 @@ void _glfwPlatformApplyCursorMode(_GLFWwindow* window)
CGAssociateMouseAndMouseCursorPosition(true);
}
int _glfwPlatformCreateCursor(_GLFWcursor* cursor, int width, int height, int cx, int cy,
int format, const void* data)
{
NSImage* image;
NSBitmapImageRep* rep;
rep = [[NSBitmapImageRep alloc]
initWithBitmapDataPlanes:NULL
pixelsWide:width
pixelsHigh:height
bitsPerSample:8
samplesPerPixel:4
hasAlpha:YES
isPlanar:NO
colorSpaceName:NSCalibratedRGBColorSpace
bitmapFormat:NSAlphaNonpremultipliedBitmapFormat
bytesPerRow:width * 4
bitsPerPixel:32];
if (rep == nil)
return GL_FALSE;
memcpy([rep bitmapData], data, 4 * width * height);
image = [[NSImage alloc] initWithSize:NSMakeSize(width, height)];
[image addRepresentation: rep];
cursor->ns.handle = [[NSCursor alloc] initWithImage:image
hotSpot:NSMakePoint(cx, cy)];
[image release];
[rep release];
if (cursor->ns.handle == nil)
return GL_FALSE;
return GL_TRUE;
}
void _glfwPlatformDestroyCursor(_GLFWcursor* cursor)
{
[(NSCursor*) cursor->ns.handle release];
}
void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
{
if (window->cursorMode == GLFW_CURSOR_NORMAL && window->ns.cursorInside)
{
if (cursor)
[(NSCursor*) cursor->ns.handle set];
else
[[NSCursor arrowCursor] set];
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////

4
src/init.c
View File

@ -156,6 +156,10 @@ GLFWAPI void glfwTerminate(void)
while (_glfw.windowListHead)
glfwDestroyWindow((GLFWwindow*) _glfw.windowListHead);
// Destroy all cursors
while (_glfw.cursorListHead)
glfwDestroyCursor((GLFWcursor*) _glfw.cursorListHead);
for (i = 0; i < _glfw.monitorCount; i++)
{
_GLFWmonitor* monitor = _glfw.monitors[i];

75
src/input.c
View File

@ -27,6 +27,11 @@
#include "internal.h"
#include <stdlib.h>
#if defined(_MSC_VER)
#include <malloc.h>
#endif
// Internal key state used for sticky keys
#define _GLFW_STICK 3
@ -348,6 +353,76 @@ GLFWAPI void glfwSetCursorPos(GLFWwindow* handle, double xpos, double ypos)
_glfwPlatformSetCursorPos(window, xpos, ypos);
}
GLFWAPI GLFWcursor* glfwCreateCursor(int width, int height, int cx, int cy,
int format, const void* data)
{
_GLFWcursor* cursor;
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
cursor = calloc(1, sizeof(_GLFWcursor));
if (!_glfwPlatformCreateCursor(cursor, width, height, cx, cy, format, data))
{
free(cursor);
return NULL;
}
cursor->next = _glfw.cursorListHead;
_glfw.cursorListHead = cursor;
return (GLFWcursor*) cursor;
}
GLFWAPI void glfwDestroyCursor(GLFWcursor* handle)
{
_GLFWcursor* cursor = (_GLFWcursor*) handle;
_GLFW_REQUIRE_INIT();
if (cursor == NULL)
return;
// Make sure the cursor is not being used by any window
{
_GLFWwindow* window = _glfw.windowListHead;
while (window)
{
if (window->cursor == cursor)
glfwSetCursor((GLFWwindow*) window, NULL);
window = window->next;
}
}
_glfwPlatformDestroyCursor(cursor);
// Unlink cursor from global linked list
{
_GLFWcursor** prev = &_glfw.cursorListHead;
while (*prev != cursor)
prev = &((*prev)->next);
*prev = cursor->next;
}
free(cursor);
}
GLFWAPI void glfwSetCursor(GLFWwindow* windowHandle, GLFWcursor* cursorHandle)
{
_GLFWwindow* window = (_GLFWwindow*) windowHandle;
_GLFWcursor* cursor = (_GLFWcursor*) cursorHandle;
_GLFW_REQUIRE_INIT();
_glfwPlatformSetCursor(window, cursor);
window->cursor = cursor;
}
GLFWAPI GLFWkeyfun glfwSetKeyCallback(GLFWwindow* handle, GLFWkeyfun cbfun)
{
_GLFWwindow* window = (_GLFWwindow*) handle;

21
src/internal.h
View File

@ -65,6 +65,7 @@ typedef struct _GLFWfbconfig _GLFWfbconfig;
typedef struct _GLFWwindow _GLFWwindow;
typedef struct _GLFWlibrary _GLFWlibrary;
typedef struct _GLFWmonitor _GLFWmonitor;
typedef struct _GLFWcursor _GLFWcursor;
#if defined(_GLFW_COCOA)
#include "cocoa_platform.h"
@ -218,6 +219,7 @@ struct _GLFWwindow
void* userPointer;
GLFWvidmode videoMode;
_GLFWmonitor* monitor;
_GLFWcursor* cursor;
// Window input state
GLboolean stickyKeys;
@ -285,6 +287,17 @@ struct _GLFWmonitor
};
/*! @brief Cursor structure
*/
struct _GLFWcursor
{
_GLFWcursor* next;
// This is defined in the window API's platform.h
_GLFW_PLATFORM_CURSOR_STATE;
};
/*! @brief Library global data.
*/
struct _GLFWlibrary
@ -319,6 +332,8 @@ struct _GLFWlibrary
double cursorPosX, cursorPosY;
_GLFWcursor* cursorListHead;
_GLFWwindow* windowListHead;
_GLFWwindow* focusedWindow;
@ -573,6 +588,12 @@ int _glfwPlatformExtensionSupported(const char* extension);
*/
GLFWglproc _glfwPlatformGetProcAddress(const char* procname);
int _glfwPlatformCreateCursor(_GLFWcursor* cursor, int width, int height, int cx, int cy,
int format, const void* data);
void _glfwPlatformDestroyCursor(_GLFWcursor* cursor);
void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor);
//========================================================================
// Event API functions

10
src/win32_platform.h
View File

@ -164,6 +164,7 @@ typedef HRESULT (WINAPI * DWMISCOMPOSITIONENABLED_T)(BOOL*);
#define _GLFW_PLATFORM_WINDOW_STATE _GLFWwindowWin32 win32
#define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE _GLFWlibraryWin32 win32
#define _GLFW_PLATFORM_MONITOR_STATE _GLFWmonitorWin32 win32
#define _GLFW_PLATFORM_CURSOR_STATE _GLFWcursorWin32 win32
//========================================================================
@ -250,6 +251,15 @@ typedef struct _GLFWmonitorWin32
} _GLFWmonitorWin32;
//------------------------------------------------------------------------
// Platform-specific cursor structure
//------------------------------------------------------------------------
typedef struct _GLFWcursorWin32
{
HCURSOR handle;
} _GLFWcursorWin32;
//========================================================================
// Prototypes for platform specific internal functions
//========================================================================

95
src/win32_window.c
View File

@ -100,7 +100,12 @@ static void restoreCursor(_GLFWwindow* window)
if (GetCursorPos(&pos))
{
if (WindowFromPoint(pos) == window->win32.handle)
SetCursor(LoadCursorW(NULL, IDC_ARROW));
{
if (window->cursor)
SetCursor(window->cursor->win32.handle);
else
SetCursor(LoadCursorW(NULL, IDC_ARROW));
}
}
}
@ -720,6 +725,11 @@ static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg,
SetCursor(NULL);
return TRUE;
}
else if (window->cursor)
{
SetCursor(window->cursor->win32.handle);
return TRUE;
}
}
break;
@ -1213,6 +1223,89 @@ void _glfwPlatformApplyCursorMode(_GLFWwindow* window)
}
}
int _glfwPlatformCreateCursor(_GLFWcursor* cursor, int width, int height, int cx, int cy,
int format, const void* data)
{
HDC hdc;
HBITMAP hBitmap, hMonoBitmap;
BITMAPV5HEADER bi;
ICONINFO ii;
DWORD *buffer = 0;
BYTE *image = (BYTE*) data;
int i, size = width * height;
ZeroMemory(&bi, sizeof(BITMAPV5HEADER));
bi.bV5Size = sizeof(BITMAPV5HEADER);
bi.bV5Width = width;
bi.bV5Height = -height;
bi.bV5Planes = 1;
bi.bV5BitCount = 32;
bi.bV5Compression = BI_BITFIELDS;
bi.bV5RedMask = 0x00FF0000;
bi.bV5GreenMask = 0x0000FF00;
bi.bV5BlueMask = 0x000000FF;
bi.bV5AlphaMask = 0xFF000000;
hdc = GetDC(NULL);
hBitmap = CreateDIBSection(hdc, (BITMAPINFO*) &bi, DIB_RGB_COLORS, (void**) &buffer,
NULL, (DWORD) 0);
ReleaseDC(NULL, hdc);
if (hBitmap == NULL)
return GL_FALSE;
hMonoBitmap = CreateBitmap(width, height, 1, 1, NULL);
if (hMonoBitmap == NULL)
{
DeleteObject(hBitmap);
return GL_FALSE;
}
for (i = 0; i < size; i++, buffer++, image += 4)
*buffer = (image[3] << 24) | (image[0] << 16) | (image[1] << 8) | image[2];
ii.fIcon = FALSE;
ii.xHotspot = cx;
ii.yHotspot = cy;
ii.hbmMask = hMonoBitmap;
ii.hbmColor = hBitmap;
cursor->win32.handle = (HCURSOR) CreateIconIndirect(&ii);
DeleteObject(hBitmap);
DeleteObject(hMonoBitmap);
if (cursor->win32.handle == NULL)
return GL_FALSE;
return GL_TRUE;
}
void _glfwPlatformDestroyCursor(_GLFWcursor* cursor)
{
DestroyIcon((HICON) cursor->win32.handle);
}
void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
{
// It should be guaranteed that the cursor is not being used by this window if
// the following condition is not met. That way it should be safe to destroy the
// cursor after calling glfwSetCursor(window, NULL) on all windows using the cursor.
if (window->cursorMode == GLFW_CURSOR_NORMAL && _glfw.focusedWindow == window &&
window->win32.cursorInside)
{
if (cursor)
SetCursor(cursor->win32.handle);
else
SetCursor(LoadCursor(NULL, IDC_ARROW));
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////

11
src/x11_platform.h
View File

@ -34,6 +34,7 @@
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <X11/Xcursor/Xcursor.h>
// The Xf86VidMode extension provides fallback gamma control
#include <X11/extensions/xf86vmode.h>
@ -62,6 +63,7 @@
#define _GLFW_PLATFORM_WINDOW_STATE _GLFWwindowX11 x11
#define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE _GLFWlibraryX11 x11
#define _GLFW_PLATFORM_MONITOR_STATE _GLFWmonitorX11 x11
#define _GLFW_PLATFORM_CURSOR_STATE _GLFWcursorX11 x11
//========================================================================
@ -232,6 +234,15 @@ typedef struct _GLFWmonitorX11
} _GLFWmonitorX11;
//------------------------------------------------------------------------
// Platform-specific cursor structure
//------------------------------------------------------------------------
typedef struct _GLFWcursorX11
{
Cursor handle;
} _GLFWcursorX11;
//========================================================================
// Prototypes for platform specific internal functions
//========================================================================

58
src/x11_window.c
View File

@ -394,7 +394,14 @@ static void disableCursor(_GLFWwindow* window)
static void restoreCursor(_GLFWwindow* window)
{
XUngrabPointer(_glfw.x11.display, CurrentTime);
XUndefineCursor(_glfw.x11.display, window->x11.handle);
if (window->cursor)
{
XDefineCursor(_glfw.x11.display, window->x11.handle,
window->cursor->x11.handle);
}
else
XUndefineCursor(_glfw.x11.display, window->x11.handle);
}
// Enter fullscreen mode
@ -1349,6 +1356,55 @@ void _glfwPlatformApplyCursorMode(_GLFWwindow* window)
}
}
int _glfwPlatformCreateCursor(_GLFWcursor* cursor, int width, int height, int cx, int cy,
int format, const void* data)
{
XcursorImage* cursorImage;
XcursorPixel* buffer;
unsigned char* image = (unsigned char*) data;
int i, size = width * height;
cursorImage = XcursorImageCreate(width, height);
if (cursorImage == NULL)
return GL_FALSE;
cursorImage->xhot = cx;
cursorImage->yhot = cy;
buffer = cursorImage->pixels;
for (i = 0; i < size; i++, buffer++, image += 4)
*buffer = (image[3] << 24) | (image[0] << 16) | (image[1] << 8) | image[2];
cursor->x11.handle = XcursorImageLoadCursor(_glfw.x11.display, cursorImage);
XcursorImageDestroy(cursorImage);
if (cursor->x11.handle == None)
return GL_FALSE;
return GL_TRUE;
}
void _glfwPlatformDestroyCursor(_GLFWcursor* cursor)
{
XFreeCursor(_glfw.x11.display, cursor->x11.handle);
}
void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
{
if (window->cursorMode == GLFW_CURSOR_NORMAL)
{
if (cursor)
XDefineCursor(_glfw.x11.display, window->x11.handle, cursor->x11.handle);
else
XUndefineCursor(_glfw.x11.display, window->x11.handle);
XFlush(_glfw.x11.display);
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////

8
tests/CMakeLists.txt
View File

@ -32,6 +32,10 @@ add_executable(joysticks joysticks.c)
add_executable(modes modes.c ${GETOPT})
add_executable(peter peter.c)
add_executable(reopen reopen.c)
add_executable(cursor cursor.c)
add_executable(cursoranim WIN32 MACOSX_BUNDLE cursoranim.c)
set_target_properties(cursoranim PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Cursor animation")
add_executable(accuracy WIN32 MACOSX_BUNDLE accuracy.c)
set_target_properties(accuracy PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Accuracy")
@ -57,9 +61,9 @@ set_target_properties(windows PROPERTIES MACOSX_BUNDLE_BUNDLE_NAME "Windows")
target_link_libraries(empty ${CMAKE_THREAD_LIBS_INIT} ${RT_LIBRARY})
target_link_libraries(threads ${CMAKE_THREAD_LIBS_INIT} ${RT_LIBRARY})
set(WINDOWS_BINARIES accuracy empty sharing tearing threads title windows)
set(WINDOWS_BINARIES accuracy empty sharing tearing threads title windows cursoranim)
set(CONSOLE_BINARIES clipboard defaults events fsaa gamma glfwinfo
iconify joysticks modes peter reopen)
iconify joysticks modes peter reopen cursor)
if (MSVC)
# Tell MSVC to use main instead of WinMain for Windows subsystem executables

283
tests/cursor.c Normal file
View File

@ -0,0 +1,283 @@
//========================================================================
// Cursor & input mode tests
// Copyright (c) Camilla Berglund <elmindreda@elmindreda.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
//
// System cursors and input modes tests.
//
//========================================================================
#define GLFW_INCLUDE_GLU
#include <GLFW/glfw3.h>
#include <stdio.h>
#include <stdlib.h>
static int W = 640;
static int H = 480;
static int delay = 0;
static GLFWwindow* windows[2] = {NULL, NULL};
static GLFWwindow* activeWindow = NULL;
static GLFWcursor* cursor = NULL;
static struct { int key; double time; } commands[] = {
{GLFW_KEY_H, 0},
{GLFW_KEY_C, 0},
{GLFW_KEY_D, 0},
{GLFW_KEY_S, 0},
{GLFW_KEY_N, 0},
{GLFW_KEY_1, 0},
{GLFW_KEY_2, 0},
{GLFW_KEY_3, 0}
};
static int CommandCount = sizeof(commands) / sizeof(commands[0]);
static struct { int w, h; } cursorSize[] = {
{24, 24}, {13, 37}, {5, 53}, {43, 64}, {300, 300}
};
static int SizeCount = sizeof(cursorSize) / sizeof(cursorSize[0]);
static int currentSize = 0;
static void command_callback(int key)
{
switch (key)
{
case GLFW_KEY_H:
{
printf("H: show this help\n");
printf("C: call glfwCreateCursor()\n");
printf("D: call glfwDestroyCursor()\n");
printf("S: call glfwSetCursor()\n");
printf("N: call glfwSetCursor() with NULL\n");
printf("1: set GLFW_CURSOR_NORMAL\n");
printf("2: set GLFW_CURSOR_HIDDEN\n");
printf("3: set GLFW_CURSOR_DISABLED\n");
printf("T: enable 3s delay for all previous commands\n");
}
break;
case GLFW_KEY_C:
{
if (cursor == NULL)
{
int w = cursorSize[currentSize].w;
int h = cursorSize[currentSize].h;
int x, y, i = 0;
unsigned char *image = malloc(4 * w * h);
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
image[i++] = 0xFF;
image[i++] = 0;
image[i++] = 255 * y / h;
image[i++] = 255 * x / w;
}
}
cursor = glfwCreateCursor(w, h, w / 2, h / 2, 0, image);
currentSize = (currentSize + 1) % SizeCount;
free(image);
}
}
break;
case GLFW_KEY_D:
{
if (cursor != NULL)
{
glfwDestroyCursor(cursor);
cursor = NULL;
}
}
break;
case GLFW_KEY_S:
{
if (cursor != NULL)
glfwSetCursor(activeWindow, cursor);
else
printf("The cursor is not created\n");
}
break;
case GLFW_KEY_N:
{
glfwSetCursor(activeWindow, NULL);
}
break;
case GLFW_KEY_1:
{
glfwSetInputMode(activeWindow, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
}
break;
case GLFW_KEY_2:
{
glfwSetInputMode(activeWindow, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
}
break;
case GLFW_KEY_3:
{
glfwSetInputMode(activeWindow, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
}
break;
}
}
static void error_callback(int error, const char* description)
{
fprintf(stderr, "Error: %s\n", description);
}
static void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
W = width;
H = height;
glViewport(0, 0, W, H);
}
static void refresh_callback(GLFWwindow* window)
{
glfwMakeContextCurrent(window);
glClearColor(0.0f, window == activeWindow ? 0.8f : 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
glfwSwapBuffers(window);
}
static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
if (action != GLFW_PRESS)
return;
switch (key)
{
case GLFW_KEY_ESCAPE:
glfwSetWindowShouldClose(window, GL_TRUE);
break;
case GLFW_KEY_T:
delay = !delay;
printf("Delay %s.\n", delay ? "enabled" : "disabled");
break;
default:
{
if (delay)
{
int i = 0;
while (i < CommandCount && commands[i].key != key)
i++;
if (i < CommandCount)
commands[i].time = glfwGetTime();
}
else
{
command_callback(key);
}
}
break;
}
}
static void focus_callback(GLFWwindow* window, int focused)
{
if (focused)
{
activeWindow = window;
refresh_callback(windows[0]);
refresh_callback(windows[1]);
}
}
int main(void)
{
int i;
GLboolean running = GL_TRUE;
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
for (i = 0; i < 2; i++)
{
windows[i] = glfwCreateWindow(W, H, "Cursor testing", NULL, NULL);
if (!windows[i])
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwSetWindowPos(windows[i], 100 + (i & 1) * (W + 50), 100);
glfwSetWindowRefreshCallback(windows[i], refresh_callback);
glfwSetFramebufferSizeCallback(windows[i], framebuffer_size_callback);
glfwSetKeyCallback(windows[i], key_callback);
glfwSetWindowFocusCallback(windows[i], focus_callback);
glfwMakeContextCurrent(windows[i]);
glClear(GL_COLOR_BUFFER_BIT);
glfwSwapBuffers(windows[i]);
}
activeWindow = windows[0];
key_callback(NULL, GLFW_KEY_H, 0, GLFW_PRESS, 0);
while (running)
{
if (delay)
{
int i;
double t = glfwGetTime();
for (i = 0; i < CommandCount; i++)
{
if (commands[i].time != 0 && t - commands[i].time >= 3.0)
{
command_callback(commands[i].key);
commands[i].time = 0;
}
}
}
running = !(glfwWindowShouldClose(windows[0]) || glfwWindowShouldClose(windows[1]));
glfwPollEvents();
}
glfwTerminate();
exit(EXIT_SUCCESS);
}

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//========================================================================
// Cursor animation
// Copyright (c) Camilla Berglund <elmindreda@elmindreda.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
//
// Cursor animation test.
//
//========================================================================
#include <GLFW/glfw3.h>
#include <stdlib.h>
#include <math.h>
#ifdef min
#undef min
#endif
#ifdef max
#undef max
#endif
#define SIZE 64 // cursor size (width & height)
#define N 60 // number of frames
unsigned char buffer[4 * SIZE * SIZE];
static float max(float a, float b) { return a > b ? a : b; }
static float min(float a, float b) { return a < b ? a : b; }
static float star(int x, int y, float t)
{
float c = SIZE / 2.0f;
float i = (0.25f * (float)sin(2.0f * 3.1415926f * t) + 0.75f);
float k = SIZE * 0.046875f * i;
float dist = (float)sqrt((x - c) * (x - c) + (y - c) * (y - c));
float salpha = 1.0f - dist / c;
float xalpha = (float)x == c ? c : k / (float)fabs(x - c);
float yalpha = (float)y == c ? c : k / (float)fabs(y - c);
return max(0.0f, min(1.0f, i * salpha * 0.2f + salpha * xalpha * yalpha));
}
static GLFWcursor* load_frame(float t)
{
int i = 0, x, y;
for (y = 0; y < SIZE; y++)
{
for (x = 0; x < SIZE; x++)
{
buffer[i++] = 255;
buffer[i++] = 255;
buffer[i++] = 255;
buffer[i++] = (unsigned char)(255 * star(x, y, t));
}
}
return glfwCreateCursor(SIZE, SIZE, SIZE / 2, SIZE / 2, 0, buffer);
}
int main(void)
{
int i;
double t0, t1, frameTime = 0.0;
GLFWwindow* window;
GLFWcursor* frames[N];
if (!glfwInit())
exit(EXIT_FAILURE);
window = glfwCreateWindow(640, 480, "Cursor animation", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwMakeContextCurrent(window);
glfwSwapInterval(1);
for (i = 0; i < N; i++)
frames[i] = load_frame(i / (float)N);
i = 0;
t0 = glfwGetTime();
while (!glfwWindowShouldClose(window))
{
glClear(GL_COLOR_BUFFER_BIT);
glfwSetCursor(window, frames[i]);
glfwSwapBuffers(window);
glfwPollEvents();
t1 = glfwGetTime();
frameTime += t1 - t0;
t0 = t1;
while (frameTime > 1.0 / (double)N)
{
i = (i + 1) % N;
frameTime -= 1.0 / (double)N;
}
}
glfwTerminate();
exit(EXIT_SUCCESS);
}