add glfw library

1 files changed, 493 insertions, 0 deletions

diff --git a/libs/glfw-3.3.8/tests/cursor.c b/libs/glfw-3.3.8/tests/cursor.c
new file mode 100644
index 0000000..b6288f6
--- /dev/null
+++ b/libs/glfw-3.3.8/tests/cursor.c
@@ -0,0 +1,493 @@
+//========================================================================
+// 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);
+}
+