ascension: src/glcontext.c@9c44c55d327a

consistently refer to windows by ID - fixes #381

This change discovered that the font cache is completely broken. We created issue #387 for this.

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  * Copyright 2023 Mike Becker. All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions are met:

     7  *

     8  *   1. Redistributions of source code must retain the above copyright

     9  *      notice, this list of conditions and the following disclaimer.

    10  *

    11  *   2. Redistributions in binary form must reproduce the above copyright

    12  *      notice, this list of conditions and the following disclaimer in the

    13  *      documentation and/or other materials provided with the distribution.

    14  *

    15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    16  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    18  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    19  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    20  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    21  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    24  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    25  * POSSIBILITY OF SUCH DAMAGE.

    26  */

    28 #include "ascension/glcontext.h"

    29 #include "ascension/error.h"

    31 #include <cx/printf.h>

    33 #include <GL/glew.h>

    35 static void asc_gl_debug_callback(

    36         GLenum source, GLenum type, GLuint id, GLenum severity,

    37         GLsizei length, const GLchar* message,

    38         const void* userParam

    39 ) {

    40     cxmutstr buf = cx_asprintf(

    41             "source = %d, id = %u, type = %d, severity= %d, message = %.*s",

    42             source, id, type, severity, length, message);

    43     if (type == GL_DEBUG_TYPE_ERROR) {

    44         asc_error(buf.ptr);

    45     } else {

    46         asc_dprintf("GL debug: %.*s", (int)buf.length, buf.ptr);

    47     }

    48     cx_strfree(&buf);

    49 }

    51 static void asc_shader_initialize_predefined(AscGLContext *ctx) {

    52     AscShaderSprite *sprite = &ctx->shader.sprite;

    53     sprite->base = asc_shader_easy_compile_and_link("shader/sprite_vtx.glsl", "shader/sprite_frag.glsl");

    54     sprite->depth = glGetUniformLocation(sprite->base.id, "depth");

    55     sprite->tex = glGetUniformLocation(sprite->base.id, "texture");

    56 }

    58 static void asc_shader_destroy_predefined(AscGLContext *ctx) {

    59     asc_shader_program_destroy(ctx->shader.sprite.base);

    60 }

    62 bool asc_gl_context_initialize(

    63         AscGLContext *ctx,

    64         SDL_Window *window,

    65         AscGLContextSettings const *settings

    66 ) {

    67     SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);

    68     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, settings->gl_major_version);

    69     SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, settings->gl_minor_version);

    70     SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, settings->depth_size);

    71     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

    72     ctx->glctx = SDL_GL_CreateContext(window);

    73     if (ctx->glctx == NULL) return false;

    74     ctx->window = window;

    76     glewExperimental = GL_TRUE;

    77     GLenum err = glewInit();

    78     if (err == GLEW_OK) {

    79         SDL_GL_SetSwapInterval(settings->vsync);

    81         glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

    82         glEnable(GL_DEBUG_OUTPUT);

    83         glDebugMessageCallback(asc_gl_debug_callback, NULL);

    85         if (!asc_primitives_init(&ctx->primitives)) {

    86             asc_error("Creating primitive meshes failed");

    87             SDL_GL_DeleteContext(ctx->glctx);

    88             return false;

    89         }

    91         asc_shader_initialize_predefined(ctx);

    93         return true;

    94     } else {

    95         asc_error(glewGetErrorString(err));

    96         SDL_GL_DeleteContext(ctx->glctx);

    97         return false;

    98     }

    99 }

   101 void asc_gl_context_destroy(AscGLContext *ctx) {

   102     if (ctx->glctx == NULL) return;

   103     SDL_GL_MakeCurrent(ctx->window, ctx->glctx);

   105     asc_shader_destroy_predefined(ctx);

   106     asc_primitives_destroy(&ctx->primitives);

   108     // destroy the GL context and the window

   109     SDL_GL_DeleteContext(ctx->glctx);

   110     ctx->glctx = NULL;

   111 }

Mercurial > hg > ascension / file revision