ref: 0103f2696b737956e09b2fbdd735c7042a947cf2
dir: /external/glfw/tests/cursor.c/
//======================================================================== // 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/gl.h> #define GLFW_INCLUDE_NONE #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 GLFWcursor* tracking_cursor = NULL; 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 GLFWcursor* create_tracking_cursor(void) { int i = 0, x, y; unsigned char buffer[32 * 32 * 4]; const GLFWimage image = { 32, 32, buffer }; for (y = 0; y < image.width; y++) { for (x = 0; x < image.height; x++) { if (x == 7 || y == 7) { buffer[i++] = 255; buffer[i++] = 0; buffer[i++] = 0; buffer[i++] = 255; } else { buffer[i++] = 0; buffer[i++] = 0; buffer[i++] = 0; buffer[i++] = 0; } } } return glfwCreateCursor(&image, 7, 7); } 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); glfwGetCursorPos(window, &cursor_x, &cursor_y); 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; if (track_cursor) glfwSetCursor(window, tracking_cursor); else glfwSetCursor(window, NULL); break; case GLFW_KEY_P: { double x, y; glfwGetCursorPos(window, &x, &y); printf("Query before set: %f %f (%+f %+f)\n", x, y, x - cursor_x, y - cursor_y); cursor_x = x; cursor_y = y; glfwSetCursorPos(window, cursor_x, cursor_y); glfwGetCursorPos(window, &x, &y); printf("Query after set: %f %f (%+f %+f)\n", x, y, x - cursor_x, y - cursor_y); cursor_x = x; cursor_y = y; break; } case GLFW_KEY_UP: glfwSetCursorPos(window, 0, 0); glfwGetCursorPos(window, &cursor_x, &cursor_y); break; case GLFW_KEY_DOWN: { int width, height; glfwGetWindowSize(window, &width, &height); glfwSetCursorPos(window, width - 1, height - 1); glfwGetCursorPos(window, &cursor_x, &cursor_y); 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; case GLFW_KEY_F11: case GLFW_KEY_ENTER: { static int x, y, width, height; if (mods != GLFW_MOD_ALT) return; if (glfwGetWindowMonitor(window)) glfwSetWindowMonitor(window, NULL, x, y, width, height, 0); else { GLFWmonitor* monitor = glfwGetPrimaryMonitor(); const GLFWvidmode* mode = glfwGetVideoMode(monitor); glfwGetWindowPos(window, &x, &y); glfwGetWindowSize(window, &width, &height); glfwSetWindowMonitor(window, monitor, 0, 0, mode->width, mode->height, mode->refreshRate); } glfwGetCursorPos(window, &cursor_x, &cursor_y); 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); tracking_cursor = create_tracking_cursor(); if (!tracking_cursor) { glfwTerminate(); 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); gladLoadGL(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] = 0.5f; vertices[0][1] = (float) (fb_height - floor(cursor_y * scale) - 1.f + 0.5f); vertices[1][0] = (float) fb_width + 0.5f; vertices[1][1] = (float) (fb_height - floor(cursor_y * scale) - 1.f + 0.5f); vertices[2][0] = (float) floor(cursor_x * scale) + 0.5f; vertices[2][1] = 0.5f; vertices[3][0] = (float) floor(cursor_x * scale) + 0.5f; vertices[3][1] = (float) fb_height + 0.5f; 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); }