diff options
Diffstat (limited to 'src/renderer/backends/backend_opengl.c')
| -rw-r--r-- | src/renderer/backends/backend_opengl.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/src/renderer/backends/backend_opengl.c b/src/renderer/backends/backend_opengl.c deleted file mode 100644 index 4cd97b5..0000000 --- a/src/renderer/backends/backend_opengl.c +++ /dev/null @@ -1,171 +0,0 @@ -#include <stdlib.h> -#include "camera.h" -#define CEL_PLATFORM_LINUX - -#include "defines.h" -#include "file.h" -#include "log.h" -#include "maths_types.h" -#include "ral.h" - -#if CEL_REND_BACKEND_OPENGL - -#include <glad/glad.h> - -#include <glfw3.h> - -/** @brief Internal backend state */ -typedef struct opengl_state { -} opengl_state; - -bool gfx_backend_init(renderer *ren) { - INFO("loading OpenGL backend"); - - // glfwInit(); // Already handled in `renderer_init` - glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4); - glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1); - glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); - glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); - - // glad: load all OpenGL function pointers - if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) { - ERROR("Failed to initialise GLAD \n"); - - return false; - } - - glEnable(GL_DEPTH_TEST); - - opengl_state *internal = malloc(sizeof(opengl_state)); - ren->backend_context = (void *)internal; - - return true; -} - -void gfx_backend_draw_frame(renderer *ren, camera *cam, mat4 model, texture *tex) {} - -void gfx_backend_shutdown(renderer *ren) {} - -void uniform_vec3f(u32 program_id, const char *uniform_name, vec3 *value) { - glUniform3fv(glGetUniformLocation(program_id, uniform_name), 1, &value->x); -} -void uniform_f32(u32 program_id, const char *uniform_name, f32 value) { - glUniform1f(glGetUniformLocation(program_id, uniform_name), value); -} -void uniform_i32(u32 program_id, const char *uniform_name, i32 value) { - glUniform1i(glGetUniformLocation(program_id, uniform_name), value); -} -void uniform_mat4f(u32 program_id, const char *uniform_name, mat4 *value) { - glUniformMatrix4fv(glGetUniformLocation(program_id, uniform_name), 1, GL_FALSE, value->data); -} - -void clear_screen(vec3 colour) { - glClearColor(colour.x, colour.y, colour.z, 1.0f); - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); -} - -void texture_data_upload(texture *tex) { - printf("Texture name %s\n", tex->name); - TRACE("Upload texture data"); - u32 texture_id; - glGenTextures(1, &texture_id); - glBindTexture(GL_TEXTURE_2D, texture_id); - tex->texture_id = texture_id; - - // set the texture wrapping parameters - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, - GL_REPEAT); // set texture wrapping to GL_REPEAT (default wrapping method) - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - // set texture filtering parameters - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, tex->width, tex->height, 0, tex->channel_type, - GL_UNSIGNED_BYTE, tex->image_data); - glGenerateMipmap(GL_TEXTURE_2D); - DEBUG("Freeing texture image data after uploading to GPU"); - // stbi_image_free(tex->image_data); // data is on gpu now so we dont need it around -} - -void bind_texture(shader s, texture *tex, u32 slot) { - // printf("bind texture slot %d with texture id %d \n", slot, tex->texture_id); - glActiveTexture(GL_TEXTURE0 + slot); - glBindTexture(GL_TEXTURE_2D, tex->texture_id); -} - -void bind_mesh_vertex_buffer(void *_backend, mesh *mesh) { glBindVertexArray(mesh->vao); } - -static inline GLenum to_gl_prim_topology(enum cel_primitive_topology primitive) { - switch (primitive) { - case CEL_PRIMITIVE_TOPOLOGY_TRIANGLE: - return GL_TRIANGLES; - case CEL_PRIMITIVE_TOPOLOGY_POINT: - case CEL_PRIMITIVE_TOPOLOGY_LINE: - case CEL_PRIMITIVE_TOPOLOGY_LINE_STRIP: - case CEL_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP: - case CEL_PRIMITIVE_TOPOLOGY_COUNT: - break; - } -} - -void draw_primitives(cel_primitive_topology primitive, u32 start_index, u32 count) { - u32 gl_primitive = to_gl_prim_topology(primitive); - glDrawArrays(gl_primitive, start_index, count); -} - -shader shader_create_separate(const char *vert_shader, const char *frag_shader) { - INFO("Load shaders at %s and %s", vert_shader, frag_shader); - int success; - char info_log[512]; - - u32 vertex = glCreateShader(GL_VERTEX_SHADER); - const char *vertex_shader_src = string_from_file(vert_shader); - if (vertex_shader_src == NULL) { - ERROR("EXIT: couldnt load shader"); - exit(-1); - } - glShaderSource(vertex, 1, &vertex_shader_src, NULL); - glCompileShader(vertex); - glGetShaderiv(vertex, GL_COMPILE_STATUS, &success); - if (!success) { - glGetShaderInfoLog(vertex, 512, NULL, info_log); - printf("%s\n", info_log); - ERROR("EXIT: vertex shader compilation failed"); - exit(-1); - } - - // fragment shader - u32 fragment = glCreateShader(GL_FRAGMENT_SHADER); - const char *fragment_shader_src = string_from_file(frag_shader); - if (fragment_shader_src == NULL) { - ERROR("EXIT: couldnt load shader"); - exit(-1); - } - glShaderSource(fragment, 1, &fragment_shader_src, NULL); - glCompileShader(fragment); - glGetShaderiv(fragment, GL_COMPILE_STATUS, &success); - if (!success) { - glGetShaderInfoLog(fragment, 512, NULL, info_log); - printf("%s\n", info_log); - ERROR("EXIT: fragment shader compilation failed"); - exit(-1); - } - - u32 shader_prog; - shader_prog = glCreateProgram(); - - glAttachShader(shader_prog, vertex); - glAttachShader(shader_prog, fragment); - glLinkProgram(shader_prog); - glDeleteShader(vertex); - glDeleteShader(fragment); - free((char *)vertex_shader_src); - free((char *)fragment_shader_src); - - shader s = { .program_id = shader_prog }; - return s; -} - -void set_shader(shader s) { glUseProgram(s.program_id); } - -#endif
\ No newline at end of file |