diff options
Diffstat (limited to 'libs/glfw-3.3.8/tests/gamma.c')
| -rw-r--r-- | libs/glfw-3.3.8/tests/gamma.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/libs/glfw-3.3.8/tests/gamma.c b/libs/glfw-3.3.8/tests/gamma.c new file mode 100644 index 0000000..7419592 --- /dev/null +++ b/libs/glfw-3.3.8/tests/gamma.c @@ -0,0 +1,185 @@ +//======================================================================== +// Gamma correction test program +// 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 program is used to test the gamma correction functionality for +// both full screen and windowed mode windows +// +//======================================================================== + +#include <glad/gl.h> +#define GLFW_INCLUDE_NONE +#include <GLFW/glfw3.h> + +#define NK_IMPLEMENTATION +#define NK_INCLUDE_FIXED_TYPES +#define NK_INCLUDE_FONT_BAKING +#define NK_INCLUDE_DEFAULT_FONT +#define NK_INCLUDE_DEFAULT_ALLOCATOR +#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT +#define NK_INCLUDE_STANDARD_VARARGS +#define NK_BUTTON_TRIGGER_ON_RELEASE +#include <nuklear.h> + +#define NK_GLFW_GL2_IMPLEMENTATION +#include <nuklear_glfw_gl2.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +static void error_callback(int error, const char* description) +{ + fprintf(stderr, "Error: %s\n", description); +} + +static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods) +{ + if (action == GLFW_PRESS && key == GLFW_KEY_ESCAPE) + glfwSetWindowShouldClose(window, GLFW_TRUE); +} + +static void chart_ramp_array(struct nk_context* nk, + struct nk_color color, + int count, unsigned short int* values) +{ + if (nk_chart_begin_colored(nk, NK_CHART_LINES, + color, nk_rgb(255, 255, 255), + count, 0, 65535)) + { + int i; + for (i = 0; i < count; i++) + { + char buffer[1024]; + if (nk_chart_push(nk, values[i])) + { + snprintf(buffer, sizeof(buffer), "#%u: %u (%0.5f) ", + i, values[i], values[i] / 65535.f); + nk_tooltip(nk, buffer); + } + } + + nk_chart_end(nk); + } +} + +int main(int argc, char** argv) +{ + GLFWmonitor* monitor = NULL; + GLFWwindow* window; + GLFWgammaramp orig_ramp; + struct nk_context* nk; + struct nk_font_atlas* atlas; + float gamma_value = 1.f; + + glfwSetErrorCallback(error_callback); + + if (!glfwInit()) + exit(EXIT_FAILURE); + + monitor = glfwGetPrimaryMonitor(); + + glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_TRUE); + + window = glfwCreateWindow(800, 400, "Gamma Test", NULL, NULL); + if (!window) + { + glfwTerminate(); + exit(EXIT_FAILURE); + } + + { + const GLFWgammaramp* ramp = glfwGetGammaRamp(monitor); + if (!ramp) + { + glfwTerminate(); + exit(EXIT_FAILURE); + } + + const size_t array_size = ramp->size * sizeof(short); + orig_ramp.size = ramp->size; + orig_ramp.red = malloc(array_size); + orig_ramp.green = malloc(array_size); + orig_ramp.blue = malloc(array_size); + memcpy(orig_ramp.red, ramp->red, array_size); + memcpy(orig_ramp.green, ramp->green, array_size); + memcpy(orig_ramp.blue, ramp->blue, array_size); + } + + glfwMakeContextCurrent(window); + gladLoadGL(glfwGetProcAddress); + glfwSwapInterval(1); + + nk = nk_glfw3_init(window, NK_GLFW3_INSTALL_CALLBACKS); + nk_glfw3_font_stash_begin(&atlas); + nk_glfw3_font_stash_end(); + + glfwSetKeyCallback(window, key_callback); + + while (!glfwWindowShouldClose(window)) + { + int width, height; + struct nk_rect area; + + glfwGetWindowSize(window, &width, &height); + area = nk_rect(0.f, 0.f, (float) width, (float) height); + nk_window_set_bounds(nk, "", area); + + glClear(GL_COLOR_BUFFER_BIT); + nk_glfw3_new_frame(); + if (nk_begin(nk, "", area, 0)) + { + const GLFWgammaramp* ramp; + + nk_layout_row_dynamic(nk, 30, 3); + if (nk_slider_float(nk, 0.1f, &gamma_value, 5.f, 0.1f)) + glfwSetGamma(monitor, gamma_value); + nk_labelf(nk, NK_TEXT_LEFT, "%0.1f", gamma_value); + if (nk_button_label(nk, "Revert")) + glfwSetGammaRamp(monitor, &orig_ramp); + + ramp = glfwGetGammaRamp(monitor); + + nk_layout_row_dynamic(nk, height - 60.f, 3); + chart_ramp_array(nk, nk_rgb(255, 0, 0), ramp->size, ramp->red); + chart_ramp_array(nk, nk_rgb(0, 255, 0), ramp->size, ramp->green); + chart_ramp_array(nk, nk_rgb(0, 0, 255), ramp->size, ramp->blue); + } + + nk_end(nk); + nk_glfw3_render(NK_ANTI_ALIASING_ON); + + glfwSwapBuffers(window); + glfwWaitEventsTimeout(1.0); + } + + free(orig_ramp.red); + free(orig_ramp.green); + free(orig_ramp.blue); + + nk_glfw3_shutdown(); + glfwTerminate(); + exit(EXIT_SUCCESS); +} + |