diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 116 |
1 files changed, 109 insertions, 7 deletions
@@ -19,13 +19,10 @@ no_warn_end #if _WIN32 #include <shellapi.h> #endif +#include "gl.c" #include "unicode.h" -#if DEBUG -#include "text.h" -#else #include "text.c" -#endif #include "util.c" #define MATH_GL #include "math.c" @@ -37,6 +34,7 @@ no_warn_end #error "Unrecognized operating system." #endif + #include "command.h" #include "colors.h" #include "time.c" @@ -84,6 +82,15 @@ static Rect error_box_rect(Ted *ted) { V2(menu_get_width(ted), 3 * char_height + 2 * padding)); } +#if DEBUG +static void APIENTRY gl_message_callback(GLenum source, GLenum type, unsigned int id, GLenum severity, + GLsizei length, const char *message, const void *userParam) { + (void)source; (void)type; (void)id; (void)length; (void)userParam; + if (severity == GL_DEBUG_SEVERITY_NOTIFICATION) return; + debug_println("Message from OpenGL: %s.", message); +} +#endif + #if _WIN32 INT WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR lpCmdLine, INT nCmdShow) { @@ -237,15 +244,103 @@ int main(int argc, char **argv) { } // if we can't find the icon file, it's no big deal } - SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2); - SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0); + gl_version_major = 4; + gl_version_minor = 3; + SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, gl_version_major); + SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, gl_version_minor); +#if DEBUG + SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_DEBUG_FLAG); +#endif SDL_GLContext *glctx = SDL_GL_CreateContext(window); if (!glctx) { - die("%s", SDL_GetError()); + debug_println("Couldn't get GL 4.3 context. Falling back to 2.0."); + gl_version_major = 2; + gl_version_minor = 0; + SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, gl_version_major); + SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, gl_version_minor); + SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0); + glctx = SDL_GL_CreateContext(window); + if (!glctx) + die("%s", SDL_GetError()); + } + gl_get_procs(); + +#if DEBUG + if (gl_version_major * 100 + gl_version_minor >= 403) { + GLint flags = 0; + glGetIntegerv(GL_CONTEXT_FLAGS, &flags); + glEnable(GL_DEBUG_OUTPUT); + glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS); + if (flags & GL_CONTEXT_FLAG_DEBUG_BIT) { + // set up debug message callback + glDebugMessageCallback(gl_message_callback, NULL); + glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, NULL, GL_TRUE); + } } +#endif SDL_GL_SetSwapInterval(1); // vsync + char const *vshader_code = "#version 110\n\ +attribute vec2 v_pos;\n\ +uniform vec2 window_size;\n\ +void main() {\n\ + float x = v_pos.x / window_size.x * 2.0 - 1.0;\n\ + float y = 1.0 - v_pos.y / window_size.y * 2.0;\n\ + gl_Position = vec4(x, y, 0.0, 1.0);\n\ +}\n\ +"; + char const *fshader_code = "#version 110\n\ +uniform vec4 color;\n\ +void main() {\n\ + gl_FragColor = color;\n\ +}\n\ +"; + float vertices[][2] = { + {0, 0}, + {50, 0}, + {0, 50}, + }; + GLuint program = gl_compile_and_link_shaders(vshader_code, fshader_code); + GLuint v_pos = gl_attrib_loc(program, "v_pos"); + GLint u_window_size = gl_uniform_loc(program, "window_size"); + GLint u_color = gl_uniform_loc(program, "color"); + + GLuint vbo = 0, vao = 0; + glGenBuffers(1, &vbo); + glGenVertexArrays(1, &vao); + + glBindVertexArray(vao); + glBindBuffer(GL_ARRAY_BUFFER, vbo); + glBufferData(GL_ARRAY_BUFFER, sizeof vertices, vertices, GL_STATIC_DRAW); + glVertexAttribPointer(v_pos, 2, GL_FLOAT, 0, 2 * sizeof(float), (void *)0); + glEnableVertexAttribArray(v_pos); + glBindVertexArray(0); + + while (1) { + int w, h; + SDL_GetWindowSize(window, &w, &h); + + SDL_Event event; + while (SDL_PollEvent(&event)) if (event.type == SDL_QUIT) return 0; + + glViewport(0, 0, w, h); + glClearColor(0,0,0,1); + glClear(GL_COLOR_BUFFER_BIT); + + + glUseProgram(program); + glUniform4f(u_color, 1, 1, 0, 1); + glUniform2f(u_window_size, (float)w, (float)h); + glBindVertexArray(vao); + + glDrawArrays(GL_TRIANGLES, 0, 3); + SDL_GL_SwapWindow(window); + } + + return 0; + + ted_load_fonts(ted); if (ted_haserr(ted)) die("Error loading font: %s", ted_geterr(ted)); @@ -339,6 +434,9 @@ int main(int argc, char **argv) { case SDL_QUIT: command_execute(ted, CMD_QUIT, 1); break; + int w, h; + SDL_GetWindowSize(window, &w, &h); + case SDL_MOUSEWHEEL: { // scroll with mouse wheel Sint32 dx = event.wheel.x, dy = -event.wheel.y; @@ -398,6 +496,7 @@ int main(int argc, char **argv) { } } ted->drag_buffer = buffer; + } } } break; @@ -549,6 +648,9 @@ int main(int argc, char **argv) { } for (u16 i = 0; i < TED_MAX_BUFFERS; ++i) { TextBuffer *buffer = &ted->buffers[i]; + int w, h; + SDL_GetWindowSize(window, &w, &h); + if (buffer_haserr(buffer)) { ted_seterr_to_buferr(ted, buffer); buffer_clearerr(buffer); |