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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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8
tests/CMakeLists.txt
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@@ -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
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@@ -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);
}

133
tests/cursoranim.c Normal file
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@@ -0,0 +1,133 @@
//========================================================================
// 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);
}