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SDL/test/testwm.c
Sam Lantinga 4f55271571 Removed temporary memory from the API 
It was intended to make the API easier to use, but various automatic garbage collection all had flaws, and making the application periodically clean up temporary memory added cognitive load to using the API, and in many cases was it was difficult to restructure threaded code to handle this.

So, we're largely going back to the original system, where the API returns allocated results and you free them.

In addition, to solve the problems we originally wanted temporary memory for:
* Short strings with a finite count, like device names, get stored in a per-thread string pool.
* Events continue to use temporary memory internally, which is cleaned up on the next event processing cycle.
2024-07-26 20:59:14 -07:00

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/*
Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.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.
*/
#include <SDL3/SDL_test_common.h>
#include <SDL3/SDL_test_font.h>
#include <SDL3/SDL_main.h>
#ifdef SDL_PLATFORM_EMSCRIPTEN
#include <emscripten/emscripten.h>
#endif
static SDLTest_CommonState *state;
static int done;
static const char *cursorNames[] = {
"arrow",
"ibeam",
"wait",
"crosshair",
"waitarrow",
"sizeNWSE",
"sizeNESW",
"sizeWE",
"sizeNS",
"sizeALL",
"NO",
"hand",
"window top left",
"window top",
"window top right",
"window right",
"window bottom right",
"window bottom",
"window bottom left",
"window left"
};
SDL_COMPILE_TIME_ASSERT(cursorNames, SDL_arraysize(cursorNames) == SDL_NUM_SYSTEM_CURSORS);
static int system_cursor = -1;
static SDL_Cursor *cursor = NULL;
static const SDL_DisplayMode *highlighted_mode = NULL;
/* Draws the modes menu, and stores the mode index under the mouse in highlighted_mode */
static void
draw_modes_menu(SDL_Window *window, SDL_Renderer *renderer, SDL_FRect viewport)
{
SDL_DisplayMode **modes;
char text[1024];
const int lineHeight = 10;
int i, j;
int column_chars = 0;
int text_length;
float x, y;
float table_top;
SDL_FPoint mouse_pos = { -1.0f, -1.0f };
SDL_DisplayID *displays;
/* Get mouse position */
if (SDL_GetMouseFocus() == window) {
float window_x, window_y;
float logical_x, logical_y;
SDL_GetMouseState(&window_x, &window_y);
SDL_RenderCoordinatesFromWindow(renderer, window_x, window_y, &logical_x, &logical_y);
mouse_pos.x = logical_x;
mouse_pos.y = logical_y;
}
x = 0.0f;
y = viewport.y;
y += lineHeight;
SDL_strlcpy(text, "Click on a mode to set it with SDL_SetWindowFullscreenMode", sizeof(text));
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
SDLTest_DrawString(renderer, x, y, text);
y += lineHeight;
SDL_strlcpy(text, "Press Ctrl+Enter to toggle SDL_WINDOW_FULLSCREEN", sizeof(text));
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
SDLTest_DrawString(renderer, x, y, text);
y += lineHeight;
table_top = y;
/* Clear the cached mode under the mouse */
if (window == SDL_GetMouseFocus()) {
highlighted_mode = NULL;
}
displays = SDL_GetDisplays(NULL);
if (displays) {
for (i = 0; displays[i]; ++i) {
SDL_DisplayID display = displays[i];
modes = SDL_GetFullscreenDisplayModes(display, NULL);
for (j = 0; modes[j]; ++j) {
SDL_FRect cell_rect;
const SDL_DisplayMode *mode = modes[j];
(void)SDL_snprintf(text, sizeof(text), "%s mode %d: %dx%d@%gx %gHz",
SDL_GetDisplayName(display),
j, mode->w, mode->h, mode->pixel_density, mode->refresh_rate);
/* Update column width */
text_length = (int)SDL_strlen(text);
column_chars = SDL_max(column_chars, text_length);
/* Check if under mouse */
cell_rect.x = x;
cell_rect.y = y;
cell_rect.w = (float)(text_length * FONT_CHARACTER_SIZE);
cell_rect.h = (float)lineHeight;
if (SDL_PointInRectFloat(&mouse_pos, &cell_rect)) {
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
/* Update cached mode under the mouse */
if (window == SDL_GetMouseFocus()) {
highlighted_mode = mode;
}
} else {
SDL_SetRenderDrawColor(renderer, 170, 170, 170, 255);
}
SDLTest_DrawString(renderer, x, y, text);
y += lineHeight;
if ((y + lineHeight) > (viewport.y + viewport.h)) {
/* Advance to next column */
x += (column_chars + 1) * FONT_CHARACTER_SIZE;
y = table_top;
column_chars = 0;
}
}
SDL_free(modes);
}
SDL_free(displays);
}
}
static void loop(void)
{
int i;
SDL_Event event;
#ifdef TEST_WAITEVENTTIMEOUT
/* Wait up to 20 ms for input, as a test */
Uint64 then = SDL_GetTicks();
if (SDL_WaitEventTimeout(NULL, 20)) {
SDL_Log("Got an event!\n");
}
Uint64 now = SDL_GetTicks();
SDL_Log("Waited %d ms for events\n", (int)(now - then));
#endif
while (SDL_PollEvent(&event)) {
SDLTest_CommonEvent(state, &event, &done);
if (event.type == SDL_EVENT_WINDOW_RESIZED) {
SDL_Window *window = SDL_GetWindowFromID(event.window.windowID);
if (window) {
SDL_Log("Window %" SDL_PRIu32 " resized to %" SDL_PRIs32 "x%" SDL_PRIs32 "\n",
event.window.windowID,
event.window.data1,
event.window.data2);
}
}
if (event.type == SDL_EVENT_WINDOW_MOVED) {
SDL_Window *window = SDL_GetWindowFromID(event.window.windowID);
if (window) {
SDL_Log("Window %" SDL_PRIu32 " moved to %" SDL_PRIs32 ",%" SDL_PRIs32 " (display %s)\n",
event.window.windowID,
event.window.data1,
event.window.data2,
SDL_GetDisplayName(SDL_GetDisplayForWindow(window)));
}
}
if (event.type == SDL_EVENT_KEY_UP) {
SDL_bool updateCursor = SDL_FALSE;
if (event.key.key == SDLK_A) {
SDL_assert(!"Keyboard generated assert");
} else if (event.key.key == SDLK_LEFT) {
--system_cursor;
if (system_cursor < 0) {
system_cursor = SDL_NUM_SYSTEM_CURSORS - 1;
}
updateCursor = SDL_TRUE;
} else if (event.key.key == SDLK_RIGHT) {
++system_cursor;
if (system_cursor >= SDL_NUM_SYSTEM_CURSORS) {
system_cursor = 0;
}
updateCursor = SDL_TRUE;
}
if (updateCursor) {
SDL_Log("Changing cursor to \"%s\"", cursorNames[system_cursor]);
SDL_DestroyCursor(cursor);
cursor = SDL_CreateSystemCursor((SDL_SystemCursor)system_cursor);
SDL_SetCursor(cursor);
}
}
if (event.type == SDL_EVENT_MOUSE_BUTTON_UP) {
SDL_Window *window = SDL_GetMouseFocus();
if (highlighted_mode && window) {
SDL_memcpy(&state->fullscreen_mode, highlighted_mode, sizeof(state->fullscreen_mode));
SDL_SetWindowFullscreenMode(window, highlighted_mode);
}
}
}
for (i = 0; i < state->num_windows; ++i) {
SDL_Window *window = state->windows[i];
SDL_Renderer *renderer = state->renderers[i];
if (window && renderer) {
float y = 0.0f;
SDL_Rect viewport;
SDL_FRect menurect;
SDL_SetRenderViewport(renderer, NULL);
SDL_GetRenderSafeArea(renderer, &viewport);
SDL_SetRenderViewport(renderer, &viewport);
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
SDL_RenderClear(renderer);
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
SDLTest_CommonDrawWindowInfo(renderer, state->windows[i], &y);
menurect.x = 0.0f;
menurect.y = y;
menurect.w = (float)viewport.w;
menurect.h = (float)viewport.h - y;
draw_modes_menu(window, renderer, menurect);
SDL_Delay(16);
SDL_RenderPresent(renderer);
}
}
#ifdef SDL_PLATFORM_EMSCRIPTEN
if (done) {
emscripten_cancel_main_loop();
}
#endif
}
int main(int argc, char *argv[])
{
int i;
/* Initialize test framework */
state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
if (!state) {
return 1;
}
/* Enable standard application logging */
SDL_SetLogPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
if (!SDLTest_CommonDefaultArgs(state, argc, argv) || !SDLTest_CommonInit(state)) {
SDLTest_CommonQuit(state);
return 1;
}
for (i = 0; i < state->num_windows; ++i) {
SDL_Renderer *renderer = state->renderers[i];
SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
SDL_RenderClear(renderer);
}
/* Main render loop */
done = 0;
#ifdef SDL_PLATFORM_EMSCRIPTEN
emscripten_set_main_loop(loop, 0, 1);
#else
while (!done) {
loop();
}
#endif
SDL_DestroyCursor(cursor);
SDLTest_CleanupTextDrawing();
SDLTest_CommonQuit(state);
return 0;
}
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