Got rendering a triangle working
This commit is contained in:
parent
2c2660bf1b
commit
797f4a49a4
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@ -0,0 +1,12 @@
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#!/usr/bin/env bash
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mkdir -p dependencies/build/
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gcc -o dependencies/build/glad.o \
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-c dependencies/sources/glad/glad.c \
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-I dependencies/include/
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gcc -o techneck.elf \
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code/source-c/*.c dependencies/build/glad.o \
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-I dependencies/include -lGL -lSDL2
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@ -0,0 +1,218 @@
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#include <glad/glad.h>
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#include <SDL2/SDL.h>
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#include <stdbool.h>
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#include <linmath.h>
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SDL_Window *window = NULL;
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SDL_GLContext gl_context;
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int main_shader = 0;
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float triangle_vertices[9] = {
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0.0f, 0.0f, 0.0f,
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0.0f, 1.0f, 0.0f,
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1.0f, 0.0f, 0.0f
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};
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typedef struct tc_vec3
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{
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float x;
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float y;
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float z;
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} tc_vec3_s;
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typedef struct tc_object
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{
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int vbo;
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int vao;
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} tc_object_s;
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typedef struct tc_block
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{
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tc_vec3_s position;
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tc_object_s drawing;
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} tc_block_s;
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tc_block_s block;
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void render_block(tc_block_s block)
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{
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glBindBuffer(GL_ARRAY_BUFFER, block.drawing.vbo);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void *) 0);
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glEnableVertexAttribArray(0);
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glUseProgram(main_shader);
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glDrawArrays(GL_TRIANGLES, 0, 3);
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}
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tc_block_s tc_new_block_at_3f(float x, float y, float z)
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{
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tc_block_s block;
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block.position.x = x;
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block.position.y = y;
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block.position.z = z;
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glGenBuffers(1, &block.drawing.vbo);
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glBindBuffer(GL_ARRAY_BUFFER, block.drawing.vbo);
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glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 9, &triangle_vertices[0], GL_STATIC_DRAW);
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return block;
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}
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char * load_file(char *path, int *out_len)
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{
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FILE *file = NULL;
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if((file = fopen(path, "r")) != NULL)
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{
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fseek(file, 0, SEEK_END);
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int length = ftell(file);
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fseek(file, 0, SEEK_SET);
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char *content = malloc(length+1);
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fread(content, 1, length, file);
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if(out_len != NULL)
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{
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*out_len = length;
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}
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return content;
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}
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return NULL;
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}
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int setup_shaders(char *vertex_path, char *fragment_path)
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{
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int vertex_shader = glCreateShader(GL_VERTEX_SHADER);
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int fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
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int len_vertex_source = 0;
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char *vertex_source = load_file(vertex_path, &len_vertex_source);
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int len_fragment_source = 0;
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char *fragment_source = load_file(fragment_path, &len_fragment_source);
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glShaderSource(vertex_shader, 1, &vertex_source, &len_vertex_source);
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glShaderSource(fragment_shader, 1, &fragment_source, &len_fragment_source);
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glCompileShader(vertex_shader);
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glCompileShader(fragment_shader);
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int vertex_compile_status = 0;
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glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &vertex_compile_status);
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if(vertex_compile_status != GL_TRUE)
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{
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int log_length = 0;
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glGetShaderiv(vertex_shader, GL_INFO_LOG_LENGTH, &log_length);
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char *info_log = malloc(log_length+1);
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glGetShaderInfoLog(vertex_shader, log_length, &log_length, info_log);
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printf("VERTEX SHADER FAILED COMPILING! ERROR: %s\n", info_log);
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return -1;
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}
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int fragment_compile_status = 0;
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glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &fragment_compile_status);
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if(fragment_compile_status != GL_TRUE)
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{
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int log_length = 0;
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glGetShaderiv(fragment_shader, GL_INFO_LOG_LENGTH, &log_length);
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char *info_log = malloc(log_length+1);
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glGetShaderInfoLog(fragment_shader, log_length, &log_length, info_log);
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printf("FRAGMENT SHADER FAILED COMPILING! ERROR: %s\n", info_log);
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return -1;
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}
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int program = glCreateProgram();
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glAttachShader(program, vertex_shader);
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glAttachShader(program, fragment_shader);
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glLinkProgram(program);
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return program;
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}
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void cleanup()
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{
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SDL_GL_DeleteContext(gl_context);
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SDL_DestroyWindow(window);
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}
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void render()
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{
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float color[4] = { 0.0f, 1.0f, 0.0f, 1.0f };
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glClearBufferfv(GL_COLOR, 0, color);
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render_block(block);
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SDL_GL_SwapWindow(window);
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}
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int main(int argc, char **argv)
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{
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SDL_Init(SDL_INIT_EVERYTHING);
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window = SDL_CreateWindow(
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"Techneck",
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SDL_WINDOWPOS_CENTERED,
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SDL_WINDOWPOS_CENTERED,
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1200,
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800,
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SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE
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);
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gl_context = SDL_GL_CreateContext(window);
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gladLoadGLLoader(&SDL_GL_GetProcAddress);
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gladLoadGL();
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main_shader = setup_shaders("vertex_shader.glsl", "fragment_shader.glsl");
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block = tc_new_block_at_3f(0.0, 0.0, 0.0);
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int64_t frame_index = 1;
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while(frame_index > 0)
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{
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SDL_Event event;
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while(SDL_PollEvent(&event))
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{
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switch(event.type)
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{
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case SDL_QUIT:
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SDL_HideWindow(window);
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frame_index = -1;
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break;
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break;
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case SDL_WINDOWEVENT:
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{
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if(event.window.event == SDL_WINDOWEVENT_RESIZED)
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{
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puts("RESIZED");
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}
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} break;
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}
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}
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render();
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if(frame_index == 1)
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{
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SDL_ShowWindow(window);
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}
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++frame_index;
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SDL_Delay(1000/60);
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}
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cleanup();
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SDL_Quit();
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return 0;
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}
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#ifndef __khrplatform_h_
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#define __khrplatform_h_
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/*
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** Copyright (c) 2008-2018 The Khronos Group Inc.
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**
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** Permission is hereby granted, free of charge, to any person obtaining a
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** copy of this software and/or associated documentation files (the
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** "Materials"), to deal in the Materials without restriction, including
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** without limitation the rights to use, copy, modify, merge, publish,
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** distribute, sublicense, and/or sell copies of the Materials, and to
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** permit persons to whom the Materials are furnished to do so, subject to
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** the following conditions:
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**
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** The above copyright notice and this permission notice shall be included
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** in all copies or substantial portions of the Materials.
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**
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** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
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** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
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** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
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** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
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*/
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/* Khronos platform-specific types and definitions.
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*
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* The master copy of khrplatform.h is maintained in the Khronos EGL
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* Registry repository at https://github.com/KhronosGroup/EGL-Registry
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* The last semantic modification to khrplatform.h was at commit ID:
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* 67a3e0864c2d75ea5287b9f3d2eb74a745936692
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*
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* Adopters may modify this file to suit their platform. Adopters are
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* encouraged to submit platform specific modifications to the Khronos
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* group so that they can be included in future versions of this file.
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* Please submit changes by filing pull requests or issues on
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* the EGL Registry repository linked above.
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*
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*
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* See the Implementer's Guidelines for information about where this file
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* should be located on your system and for more details of its use:
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* http://www.khronos.org/registry/implementers_guide.pdf
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*
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* This file should be included as
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* #include <KHR/khrplatform.h>
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* by Khronos client API header files that use its types and defines.
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*
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* The types in khrplatform.h should only be used to define API-specific types.
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*
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* Types defined in khrplatform.h:
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* khronos_int8_t signed 8 bit
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* khronos_uint8_t unsigned 8 bit
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* khronos_int16_t signed 16 bit
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* khronos_uint16_t unsigned 16 bit
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* khronos_int32_t signed 32 bit
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* khronos_uint32_t unsigned 32 bit
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* khronos_int64_t signed 64 bit
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* khronos_uint64_t unsigned 64 bit
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* khronos_intptr_t signed same number of bits as a pointer
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* khronos_uintptr_t unsigned same number of bits as a pointer
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* khronos_ssize_t signed size
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* khronos_usize_t unsigned size
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* khronos_float_t signed 32 bit floating point
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* khronos_time_ns_t unsigned 64 bit time in nanoseconds
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||||
* khronos_utime_nanoseconds_t unsigned time interval or absolute time in
|
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* nanoseconds
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||||
* khronos_stime_nanoseconds_t signed time interval in nanoseconds
|
||||
* khronos_boolean_enum_t enumerated boolean type. This should
|
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* only be used as a base type when a client API's boolean type is
|
||||
* an enum. Client APIs which use an integer or other type for
|
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* booleans cannot use this as the base type for their boolean.
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*
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* Tokens defined in khrplatform.h:
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*
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* KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
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*
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* KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
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* KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
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*
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* Calling convention macros defined in this file:
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* KHRONOS_APICALL
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* KHRONOS_APIENTRY
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* KHRONOS_APIATTRIBUTES
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*
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* These may be used in function prototypes as:
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*
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* KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
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* int arg1,
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* int arg2) KHRONOS_APIATTRIBUTES;
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*/
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#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
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# define KHRONOS_STATIC 1
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#endif
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|
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/*-------------------------------------------------------------------------
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* Definition of KHRONOS_APICALL
|
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*-------------------------------------------------------------------------
|
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* This precedes the return type of the function in the function prototype.
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*/
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#if defined(KHRONOS_STATIC)
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/* If the preprocessor constant KHRONOS_STATIC is defined, make the
|
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* header compatible with static linking. */
|
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# define KHRONOS_APICALL
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#elif defined(_WIN32)
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# define KHRONOS_APICALL __declspec(dllimport)
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#elif defined (__SYMBIAN32__)
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# define KHRONOS_APICALL IMPORT_C
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#elif defined(__ANDROID__)
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# define KHRONOS_APICALL __attribute__((visibility("default")))
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#else
|
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# define KHRONOS_APICALL
|
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#endif
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|
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/*-------------------------------------------------------------------------
|
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* Definition of KHRONOS_APIENTRY
|
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*-------------------------------------------------------------------------
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* This follows the return type of the function and precedes the function
|
||||
* name in the function prototype.
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*/
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#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
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||||
/* Win32 but not WinCE */
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# define KHRONOS_APIENTRY __stdcall
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#else
|
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# define KHRONOS_APIENTRY
|
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#endif
|
||||
|
||||
/*-------------------------------------------------------------------------
|
||||
* Definition of KHRONOS_APIATTRIBUTES
|
||||
*-------------------------------------------------------------------------
|
||||
* This follows the closing parenthesis of the function prototype arguments.
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*/
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||||
#if defined (__ARMCC_2__)
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#define KHRONOS_APIATTRIBUTES __softfp
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#else
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#define KHRONOS_APIATTRIBUTES
|
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#endif
|
||||
|
||||
/*-------------------------------------------------------------------------
|
||||
* basic type definitions
|
||||
*-----------------------------------------------------------------------*/
|
||||
#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
|
||||
|
||||
|
||||
/*
|
||||
* Using <stdint.h>
|
||||
*/
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||||
#include <stdint.h>
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||||
typedef int32_t khronos_int32_t;
|
||||
typedef uint32_t khronos_uint32_t;
|
||||
typedef int64_t khronos_int64_t;
|
||||
typedef uint64_t khronos_uint64_t;
|
||||
#define KHRONOS_SUPPORT_INT64 1
|
||||
#define KHRONOS_SUPPORT_FLOAT 1
|
||||
/*
|
||||
* To support platform where unsigned long cannot be used interchangeably with
|
||||
* inptr_t (e.g. CHERI-extended ISAs), we can use the stdint.h intptr_t.
|
||||
* Ideally, we could just use (u)intptr_t everywhere, but this could result in
|
||||
* ABI breakage if khronos_uintptr_t is changed from unsigned long to
|
||||
* unsigned long long or similar (this results in different C++ name mangling).
|
||||
* To avoid changes for existing platforms, we restrict usage of intptr_t to
|
||||
* platforms where the size of a pointer is larger than the size of long.
|
||||
*/
|
||||
#if defined(__SIZEOF_LONG__) && defined(__SIZEOF_POINTER__)
|
||||
#if __SIZEOF_POINTER__ > __SIZEOF_LONG__
|
||||
#define KHRONOS_USE_INTPTR_T
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#elif defined(__VMS ) || defined(__sgi)
|
||||
|
||||
/*
|
||||
* Using <inttypes.h>
|
||||
*/
|
||||
#include <inttypes.h>
|
||||
typedef int32_t khronos_int32_t;
|
||||
typedef uint32_t khronos_uint32_t;
|
||||
typedef int64_t khronos_int64_t;
|
||||
typedef uint64_t khronos_uint64_t;
|
||||
#define KHRONOS_SUPPORT_INT64 1
|
||||
#define KHRONOS_SUPPORT_FLOAT 1
|
||||
|
||||
#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
|
||||
|
||||
/*
|
||||
* Win32
|
||||
*/
|
||||
typedef __int32 khronos_int32_t;
|
||||
typedef unsigned __int32 khronos_uint32_t;
|
||||
typedef __int64 khronos_int64_t;
|
||||
typedef unsigned __int64 khronos_uint64_t;
|
||||
#define KHRONOS_SUPPORT_INT64 1
|
||||
#define KHRONOS_SUPPORT_FLOAT 1
|
||||
|
||||
#elif defined(__sun__) || defined(__digital__)
|
||||
|
||||
/*
|
||||
* Sun or Digital
|
||||
*/
|
||||
typedef int khronos_int32_t;
|
||||
typedef unsigned int khronos_uint32_t;
|
||||
#if defined(__arch64__) || defined(_LP64)
|
||||
typedef long int khronos_int64_t;
|
||||
typedef unsigned long int khronos_uint64_t;
|
||||
#else
|
||||
typedef long long int khronos_int64_t;
|
||||
typedef unsigned long long int khronos_uint64_t;
|
||||
#endif /* __arch64__ */
|
||||
#define KHRONOS_SUPPORT_INT64 1
|
||||
#define KHRONOS_SUPPORT_FLOAT 1
|
||||
|
||||
#elif 0
|
||||
|
||||
/*
|
||||
* Hypothetical platform with no float or int64 support
|
||||
*/
|
||||
typedef int khronos_int32_t;
|
||||
typedef unsigned int khronos_uint32_t;
|
||||
#define KHRONOS_SUPPORT_INT64 0
|
||||
#define KHRONOS_SUPPORT_FLOAT 0
|
||||
|
||||
#else
|
||||
|
||||
/*
|
||||
* Generic fallback
|
||||
*/
|
||||
#include <stdint.h>
|
||||
typedef int32_t khronos_int32_t;
|
||||
typedef uint32_t khronos_uint32_t;
|
||||
typedef int64_t khronos_int64_t;
|
||||
typedef uint64_t khronos_uint64_t;
|
||||
#define KHRONOS_SUPPORT_INT64 1
|
||||
#define KHRONOS_SUPPORT_FLOAT 1
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
* Types that are (so far) the same on all platforms
|
||||
*/
|
||||
typedef signed char khronos_int8_t;
|
||||
typedef unsigned char khronos_uint8_t;
|
||||
typedef signed short int khronos_int16_t;
|
||||
typedef unsigned short int khronos_uint16_t;
|
||||
|
||||
/*
|
||||
* Types that differ between LLP64 and LP64 architectures - in LLP64,
|
||||
* pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
|
||||
* to be the only LLP64 architecture in current use.
|
||||
*/
|
||||
#ifdef KHRONOS_USE_INTPTR_T
|
||||
typedef intptr_t khronos_intptr_t;
|
||||
typedef uintptr_t khronos_uintptr_t;
|
||||
#elif defined(_WIN64)
|
||||
typedef signed long long int khronos_intptr_t;
|
||||
typedef unsigned long long int khronos_uintptr_t;
|
||||
#else
|
||||
typedef signed long int khronos_intptr_t;
|
||||
typedef unsigned long int khronos_uintptr_t;
|
||||
#endif
|
||||
|
||||
#if defined(_WIN64)
|
||||
typedef signed long long int khronos_ssize_t;
|
||||
typedef unsigned long long int khronos_usize_t;
|
||||
#else
|
||||
typedef signed long int khronos_ssize_t;
|
||||
typedef unsigned long int khronos_usize_t;
|
||||
#endif
|
||||
|
||||
#if KHRONOS_SUPPORT_FLOAT
|
||||
/*
|
||||
* Float type
|
||||
*/
|
||||
typedef float khronos_float_t;
|
||||
#endif
|
||||
|
||||
#if KHRONOS_SUPPORT_INT64
|
||||
/* Time types
|
||||
*
|
||||
* These types can be used to represent a time interval in nanoseconds or
|
||||
* an absolute Unadjusted System Time. Unadjusted System Time is the number
|
||||
* of nanoseconds since some arbitrary system event (e.g. since the last
|
||||
* time the system booted). The Unadjusted System Time is an unsigned
|
||||
* 64 bit value that wraps back to 0 every 584 years. Time intervals
|
||||
* may be either signed or unsigned.
|
||||
*/
|
||||
typedef khronos_uint64_t khronos_utime_nanoseconds_t;
|
||||
typedef khronos_int64_t khronos_stime_nanoseconds_t;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Dummy value used to pad enum types to 32 bits.
|
||||
*/
|
||||
#ifndef KHRONOS_MAX_ENUM
|
||||
#define KHRONOS_MAX_ENUM 0x7FFFFFFF
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Enumerated boolean type
|
||||
*
|
||||
* Values other than zero should be considered to be true. Therefore
|
||||
* comparisons should not be made against KHRONOS_TRUE.
|
||||
*/
|
||||
typedef enum {
|
||||
KHRONOS_FALSE = 0,
|
||||
KHRONOS_TRUE = 1,
|
||||
KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
|
||||
} khronos_boolean_enum_t;
|
||||
|
||||
#endif /* __khrplatform_h_ */
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,10 @@
|
|||
#version 420 core
|
||||
|
||||
out vec4 color;
|
||||
|
||||
void main() {
|
||||
|
||||
color = vec4(1.0, 0.0, 0.0, 1.0);
|
||||
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
#version 420 core
|
||||
|
||||
layout(location=0) in vec3 pos;
|
||||
|
||||
void main() {
|
||||
|
||||
gl_Position = vec4(pos, 1.0);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue