| //======================================================================== |
| // Cursor & input mode tests |
| // Copyright (c) Camilla Löwy <elmindreda@glfw.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. |
| // |
| //======================================================================== |
| // |
| // This test provides an interface to the cursor image and cursor mode |
| // parts of the API. |
| // |
| // Custom cursor image generation by urraka. |
| // |
| //======================================================================== |
| |
| #include <glad/glad.h> |
| #include <GLFW/glfw3.h> |
| |
| #if defined(_MSC_VER) |
| // Make MS math.h define M_PI |
| #define _USE_MATH_DEFINES |
| #endif |
| |
| #include <math.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "linmath.h" |
| |
| #define CURSOR_FRAME_COUNT 60 |
| |
| static const char* vertex_shader_text = |
| "#version 110\n" |
| "uniform mat4 MVP;\n" |
| "attribute vec2 vPos;\n" |
| "void main()\n" |
| "{\n" |
| " gl_Position = MVP * vec4(vPos, 0.0, 1.0);\n" |
| "}\n"; |
| |
| static const char* fragment_shader_text = |
| "#version 110\n" |
| "void main()\n" |
| "{\n" |
| " gl_FragColor = vec4(1.0);\n" |
| "}\n"; |
| |
| static double cursor_x; |
| static double cursor_y; |
| static int swap_interval = 1; |
| static int wait_events = GLFW_TRUE; |
| static int animate_cursor = GLFW_FALSE; |
| static int track_cursor = GLFW_FALSE; |
| static GLFWcursor* standard_cursors[6]; |
| |
| static void error_callback(int error, const char* description) |
| { |
| fprintf(stderr, "Error: %s\n", description); |
| } |
| |
| static float star(int x, int y, float t) |
| { |
| const float c = 64 / 2.f; |
| |
| const float i = (0.25f * (float) sin(2.f * M_PI * t) + 0.75f); |
| const float k = 64 * 0.046875f * i; |
| |
| const float dist = (float) sqrt((x - c) * (x - c) + (y - c) * (y - c)); |
| |
| const float salpha = 1.f - dist / c; |
| const float xalpha = (float) x == c ? c : k / (float) fabs(x - c); |
| const float yalpha = (float) y == c ? c : k / (float) fabs(y - c); |
| |
| return (float) fmax(0.f, fmin(1.f, i * salpha * 0.2f + salpha * xalpha * yalpha)); |
| } |
| |
| static GLFWcursor* create_cursor_frame(float t) |
| { |
| int i = 0, x, y; |
| unsigned char buffer[64 * 64 * 4]; |
| const GLFWimage image = { 64, 64, buffer }; |
| |
| for (y = 0; y < image.width; y++) |
| { |
| for (x = 0; x < image.height; x++) |
| { |
| buffer[i++] = 255; |
| buffer[i++] = 255; |
| buffer[i++] = 255; |
| buffer[i++] = (unsigned char) (255 * star(x, y, t)); |
| } |
| } |
| |
| return glfwCreateCursor(&image, image.width / 2, image.height / 2); |
| } |
| |
| static void cursor_position_callback(GLFWwindow* window, double x, double y) |
| { |
| printf("%0.3f: Cursor position: %f %f (%+f %+f)\n", |
| glfwGetTime(), |
| x, y, x - cursor_x, y - cursor_y); |
| |
| cursor_x = x; |
| cursor_y = y; |
| } |
| |
| static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods) |
| { |
| if (action != GLFW_PRESS) |
| return; |
| |
| switch (key) |
| { |
| case GLFW_KEY_A: |
| { |
| animate_cursor = !animate_cursor; |
| if (!animate_cursor) |
| glfwSetCursor(window, NULL); |
| |
| break; |
| } |
| |
| case GLFW_KEY_ESCAPE: |
| { |
| if (glfwGetInputMode(window, GLFW_CURSOR) != GLFW_CURSOR_DISABLED) |
| { |
| glfwSetWindowShouldClose(window, GLFW_TRUE); |
| break; |
| } |
| |
| /* FALLTHROUGH */ |
| } |
| |
| case GLFW_KEY_N: |
| glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL); |
| printf("(( cursor is normal ))\n"); |
| break; |
| |
| case GLFW_KEY_D: |
| glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED); |
| printf("(( cursor is disabled ))\n"); |
| break; |
| |
| case GLFW_KEY_H: |
| glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN); |
| printf("(( cursor is hidden ))\n"); |
| break; |
| |
| case GLFW_KEY_R: |
| if (!glfwRawMouseMotionSupported()) |
| break; |
| |
| if (glfwGetInputMode(window, GLFW_RAW_MOUSE_MOTION)) |
| { |
| glfwSetInputMode(window, GLFW_RAW_MOUSE_MOTION, GLFW_FALSE); |
| printf("(( raw input is disabled ))\n"); |
| } |
| else |
| { |
| glfwSetInputMode(window, GLFW_RAW_MOUSE_MOTION, GLFW_TRUE); |
| printf("(( raw input is enabled ))\n"); |
| } |
| break; |
| |
| case GLFW_KEY_SPACE: |
| swap_interval = 1 - swap_interval; |
| printf("(( swap interval: %i ))\n", swap_interval); |
| glfwSwapInterval(swap_interval); |
| break; |
| |
| case GLFW_KEY_W: |
| wait_events = !wait_events; |
| printf("(( %sing for events ))\n", wait_events ? "wait" : "poll"); |
| break; |
| |
| case GLFW_KEY_T: |
| track_cursor = !track_cursor; |
| break; |
| |
| case GLFW_KEY_0: |
| glfwSetCursor(window, NULL); |
| break; |
| |
| case GLFW_KEY_1: |
| glfwSetCursor(window, standard_cursors[0]); |
| break; |
| |
| case GLFW_KEY_2: |
| glfwSetCursor(window, standard_cursors[1]); |
| break; |
| |
| case GLFW_KEY_3: |
| glfwSetCursor(window, standard_cursors[2]); |
| break; |
| |
| case GLFW_KEY_4: |
| glfwSetCursor(window, standard_cursors[3]); |
| break; |
| |
| case GLFW_KEY_5: |
| glfwSetCursor(window, standard_cursors[4]); |
| break; |
| |
| case GLFW_KEY_6: |
| glfwSetCursor(window, standard_cursors[5]); |
| break; |
| } |
| } |
| |
| int main(void) |
| { |
| int i; |
| GLFWwindow* window; |
| GLFWcursor* star_cursors[CURSOR_FRAME_COUNT]; |
| GLFWcursor* current_frame = NULL; |
| GLuint vertex_buffer, vertex_shader, fragment_shader, program; |
| GLint mvp_location, vpos_location; |
| |
| glfwSetErrorCallback(error_callback); |
| |
| if (!glfwInit()) |
| exit(EXIT_FAILURE); |
| |
| for (i = 0; i < CURSOR_FRAME_COUNT; i++) |
| { |
| star_cursors[i] = create_cursor_frame(i / (float) CURSOR_FRAME_COUNT); |
| if (!star_cursors[i]) |
| { |
| glfwTerminate(); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| for (i = 0; i < sizeof(standard_cursors) / sizeof(standard_cursors[0]); i++) |
| { |
| const int shapes[] = { |
| GLFW_ARROW_CURSOR, |
| GLFW_IBEAM_CURSOR, |
| GLFW_CROSSHAIR_CURSOR, |
| GLFW_HAND_CURSOR, |
| GLFW_HRESIZE_CURSOR, |
| GLFW_VRESIZE_CURSOR |
| }; |
| |
| standard_cursors[i] = glfwCreateStandardCursor(shapes[i]); |
| if (!standard_cursors[i]) |
| { |
| glfwTerminate(); |
| exit(EXIT_FAILURE); |
| } |
| } |
| |
| glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2); |
| glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0); |
| |
| window = glfwCreateWindow(640, 480, "Cursor Test", NULL, NULL); |
| if (!window) |
| { |
| glfwTerminate(); |
| exit(EXIT_FAILURE); |
| } |
| |
| glfwMakeContextCurrent(window); |
| gladLoadGLLoader((GLADloadproc) glfwGetProcAddress); |
| |
| glGenBuffers(1, &vertex_buffer); |
| glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer); |
| |
| vertex_shader = glCreateShader(GL_VERTEX_SHADER); |
| glShaderSource(vertex_shader, 1, &vertex_shader_text, NULL); |
| glCompileShader(vertex_shader); |
| |
| fragment_shader = glCreateShader(GL_FRAGMENT_SHADER); |
| glShaderSource(fragment_shader, 1, &fragment_shader_text, NULL); |
| glCompileShader(fragment_shader); |
| |
| program = glCreateProgram(); |
| glAttachShader(program, vertex_shader); |
| glAttachShader(program, fragment_shader); |
| glLinkProgram(program); |
| |
| mvp_location = glGetUniformLocation(program, "MVP"); |
| vpos_location = glGetAttribLocation(program, "vPos"); |
| |
| glEnableVertexAttribArray(vpos_location); |
| glVertexAttribPointer(vpos_location, 2, GL_FLOAT, GL_FALSE, |
| sizeof(vec2), (void*) 0); |
| glUseProgram(program); |
| |
| glfwGetCursorPos(window, &cursor_x, &cursor_y); |
| printf("Cursor position: %f %f\n", cursor_x, cursor_y); |
| |
| glfwSetCursorPosCallback(window, cursor_position_callback); |
| glfwSetKeyCallback(window, key_callback); |
| |
| while (!glfwWindowShouldClose(window)) |
| { |
| glClear(GL_COLOR_BUFFER_BIT); |
| |
| if (track_cursor) |
| { |
| int wnd_width, wnd_height, fb_width, fb_height; |
| float scale; |
| vec2 vertices[4]; |
| mat4x4 mvp; |
| |
| glfwGetWindowSize(window, &wnd_width, &wnd_height); |
| glfwGetFramebufferSize(window, &fb_width, &fb_height); |
| |
| glViewport(0, 0, fb_width, fb_height); |
| |
| scale = (float) fb_width / (float) wnd_width; |
| vertices[0][0] = 0.f; |
| vertices[0][1] = (float) (fb_height - cursor_y * scale); |
| vertices[1][0] = (float) fb_width; |
| vertices[1][1] = (float) (fb_height - cursor_y * scale); |
| vertices[2][0] = (float) (cursor_x * scale); |
| vertices[2][1] = 0.f; |
| vertices[3][0] = (float) (cursor_x * scale); |
| vertices[3][1] = (float) fb_height; |
| |
| glBufferData(GL_ARRAY_BUFFER, |
| sizeof(vertices), |
| vertices, |
| GL_STREAM_DRAW); |
| |
| mat4x4_ortho(mvp, 0.f, (float) fb_width, 0.f, (float) fb_height, 0.f, 1.f); |
| glUniformMatrix4fv(mvp_location, 1, GL_FALSE, (const GLfloat*) mvp); |
| |
| glDrawArrays(GL_LINES, 0, 4); |
| } |
| |
| glfwSwapBuffers(window); |
| |
| if (animate_cursor) |
| { |
| const int i = (int) (glfwGetTime() * 30.0) % CURSOR_FRAME_COUNT; |
| if (current_frame != star_cursors[i]) |
| { |
| glfwSetCursor(window, star_cursors[i]); |
| current_frame = star_cursors[i]; |
| } |
| } |
| else |
| current_frame = NULL; |
| |
| if (wait_events) |
| { |
| if (animate_cursor) |
| glfwWaitEventsTimeout(1.0 / 30.0); |
| else |
| glfwWaitEvents(); |
| } |
| else |
| glfwPollEvents(); |
| |
| // Workaround for an issue with msvcrt and mintty |
| fflush(stdout); |
| } |
| |
| glfwDestroyWindow(window); |
| |
| for (i = 0; i < CURSOR_FRAME_COUNT; i++) |
| glfwDestroyCursor(star_cursors[i]); |
| |
| for (i = 0; i < sizeof(standard_cursors) / sizeof(standard_cursors[0]); i++) |
| glfwDestroyCursor(standard_cursors[i]); |
| |
| glfwTerminate(); |
| exit(EXIT_SUCCESS); |
| } |
| |