1 files changed, 313 insertions, 0 deletions

diff --git a/src/contrib/SDL-3.2.20/test/testdraw.c b/src/contrib/SDL-3.2.20/test/testdraw.c
new file mode 100644
index 0000000..2ed6211
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/test/testdraw.c
@@ -0,0 +1,313 @@
+/*
+  Copyright (C) 1997-2025 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.
+*/
+
+/* Simple program:  draw as many random objects on the screen as possible */
+
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+#include <SDL3/SDL_test.h>
+
+#ifdef SDL_PLATFORM_EMSCRIPTEN
+#include <emscripten/emscripten.h>
+#endif
+
+#define NUM_OBJECTS 100
+
+static SDLTest_CommonState *state;
+static int num_objects;
+static bool cycle_color;
+static bool cycle_alpha;
+static int cycle_direction = 1;
+static int current_alpha = 255;
+static int current_color = 255;
+static SDL_BlendMode blendMode = SDL_BLENDMODE_NONE;
+static Uint64 next_fps_check;
+static Uint32 frames;
+static const int fps_check_delay = 5000;
+
+static int done;
+
+static void DrawPoints(SDL_Renderer *renderer)
+{
+    int i;
+    float x, y;
+    SDL_Rect viewport;
+
+    /* Query the sizes */
+    SDL_GetRenderViewport(renderer, &viewport);
+
+    for (i = 0; i < num_objects * 4; ++i) {
+        /* Cycle the color and alpha, if desired */
+        if (cycle_color) {
+            current_color += cycle_direction;
+            if (current_color < 0) {
+                current_color = 0;
+                cycle_direction = -cycle_direction;
+            }
+            if (current_color > 255) {
+                current_color = 255;
+                cycle_direction = -cycle_direction;
+            }
+        }
+        if (cycle_alpha) {
+            current_alpha += cycle_direction;
+            if (current_alpha < 0) {
+                current_alpha = 0;
+                cycle_direction = -cycle_direction;
+            }
+            if (current_alpha > 255) {
+                current_alpha = 255;
+                cycle_direction = -cycle_direction;
+            }
+        }
+        SDL_SetRenderDrawColor(renderer, 255, (Uint8)current_color,
+                               (Uint8)current_color, (Uint8)current_alpha);
+
+        x = (float)SDL_rand(viewport.w);
+        y = (float)SDL_rand(viewport.h);
+        SDL_RenderPoint(renderer, x, y);
+    }
+}
+
+static void DrawLines(SDL_Renderer *renderer)
+{
+    int i;
+    float x1, y1, x2, y2;
+    SDL_Rect viewport;
+
+    /* Query the sizes */
+    SDL_GetRenderViewport(renderer, &viewport);
+
+    for (i = 0; i < num_objects; ++i) {
+        /* Cycle the color and alpha, if desired */
+        if (cycle_color) {
+            current_color += cycle_direction;
+            if (current_color < 0) {
+                current_color = 0;
+                cycle_direction = -cycle_direction;
+            }
+            if (current_color > 255) {
+                current_color = 255;
+                cycle_direction = -cycle_direction;
+            }
+        }
+        if (cycle_alpha) {
+            current_alpha += cycle_direction;
+            if (current_alpha < 0) {
+                current_alpha = 0;
+                cycle_direction = -cycle_direction;
+            }
+            if (current_alpha > 255) {
+                current_alpha = 255;
+                cycle_direction = -cycle_direction;
+            }
+        }
+        SDL_SetRenderDrawColor(renderer, 255, (Uint8)current_color,
+                               (Uint8)current_color, (Uint8)current_alpha);
+
+        if (i == 0) {
+            SDL_RenderLine(renderer, 0.0f, 0.0f, (float)(viewport.w - 1), (float)(viewport.h - 1));
+            SDL_RenderLine(renderer, 0.0f, (float)(viewport.h - 1), (float)(viewport.w - 1), 0.0f);
+            SDL_RenderLine(renderer, 0.0f, (float)(viewport.h / 2), (float)(viewport.w - 1), (float)(viewport.h / 2));
+            SDL_RenderLine(renderer, (float)(viewport.w / 2), 0.0f, (float)(viewport.w / 2), (float)(viewport.h - 1));
+        } else {
+            x1 = (float)(SDL_rand(viewport.w * 2) - viewport.w);
+            x2 = (float)(SDL_rand(viewport.w * 2) - viewport.w);
+            y1 = (float)(SDL_rand(viewport.h * 2) - viewport.h);
+            y2 = (float)(SDL_rand(viewport.h * 2) - viewport.h);
+            SDL_RenderLine(renderer, x1, y1, x2, y2);
+        }
+    }
+}
+
+static void DrawRects(SDL_Renderer *renderer)
+{
+    int i;
+    SDL_FRect rect;
+    SDL_Rect viewport;
+
+    /* Query the sizes */
+    SDL_GetRenderViewport(renderer, &viewport);
+
+    for (i = 0; i < num_objects / 4; ++i) {
+        /* Cycle the color and alpha, if desired */
+        if (cycle_color) {
+            current_color += cycle_direction;
+            if (current_color < 0) {
+                current_color = 0;
+                cycle_direction = -cycle_direction;
+            }
+            if (current_color > 255) {
+                current_color = 255;
+                cycle_direction = -cycle_direction;
+            }
+        }
+        if (cycle_alpha) {
+            current_alpha += cycle_direction;
+            if (current_alpha < 0) {
+                current_alpha = 0;
+                cycle_direction = -cycle_direction;
+            }
+            if (current_alpha > 255) {
+                current_alpha = 255;
+                cycle_direction = -cycle_direction;
+            }
+        }
+        SDL_SetRenderDrawColor(renderer, 255, (Uint8)current_color,
+                               (Uint8)current_color, (Uint8)current_alpha);
+
+        rect.w = (float)SDL_rand(viewport.h / 2);
+        rect.h = (float)SDL_rand(viewport.h / 2);
+        rect.x = (SDL_rand(viewport.w * 2) - viewport.w) - (rect.w / 2);
+        rect.y = (SDL_rand(viewport.h * 2) - viewport.h) - (rect.h / 2);
+        SDL_RenderFillRect(renderer, &rect);
+    }
+}
+
+static void loop(void)
+{
+    Uint64 now;
+    int i;
+    SDL_Event event;
+
+    /* Check for events */
+    while (SDL_PollEvent(&event)) {
+        SDLTest_CommonEvent(state, &event, &done);
+    }
+    for (i = 0; i < state->num_windows; ++i) {
+        SDL_Renderer *renderer = state->renderers[i];
+        if (state->windows[i] == NULL) {
+            continue;
+        }
+        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
+        SDL_RenderClear(renderer);
+
+        DrawRects(renderer);
+        DrawLines(renderer);
+        DrawPoints(renderer);
+
+        SDL_RenderPresent(renderer);
+    }
+#ifdef SDL_PLATFORM_EMSCRIPTEN
+    if (done) {
+        emscripten_cancel_main_loop();
+    }
+#endif
+    frames++;
+    now = SDL_GetTicks();
+    if (now >= next_fps_check) {
+        /* Print out some timing information */
+        const Uint64 then = next_fps_check - fps_check_delay;
+        const double fps = ((double)frames * 1000) / (now - then);
+        SDL_Log("%2.2f frames per second", fps);
+        next_fps_check = now + fps_check_delay;
+        frames = 0;
+    }
+}
+
+int main(int argc, char *argv[])
+{
+    int i;
+    /* Initialize parameters */
+    num_objects = NUM_OBJECTS;
+
+    /* Initialize test framework */
+    state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
+    if (!state) {
+        return 1;
+    }
+
+    for (i = 1; i < argc;) {
+        int consumed;
+
+        consumed = SDLTest_CommonArg(state, i);
+        if (consumed == 0) {
+            consumed = -1;
+            if (SDL_strcasecmp(argv[i], "--blend") == 0) {
+                if (argv[i + 1]) {
+                    if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
+                        blendMode = SDL_BLENDMODE_NONE;
+                        consumed = 2;
+                    } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
+                        blendMode = SDL_BLENDMODE_BLEND;
+                        consumed = 2;
+                    } else if (SDL_strcasecmp(argv[i + 1], "blend_premultiplied") == 0) {
+                        blendMode = SDL_BLENDMODE_BLEND_PREMULTIPLIED;
+                        consumed = 2;
+                    } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
+                        blendMode = SDL_BLENDMODE_ADD;
+                        consumed = 2;
+                    } else if (SDL_strcasecmp(argv[i + 1], "add_premultiplied") == 0) {
+                        blendMode = SDL_BLENDMODE_ADD_PREMULTIPLIED;
+                        consumed = 2;
+                    } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
+                        blendMode = SDL_BLENDMODE_MOD;
+                        consumed = 2;
+                    } else if (SDL_strcasecmp(argv[i + 1], "mul") == 0) {
+                        blendMode = SDL_BLENDMODE_MUL;
+                        consumed = 2;
+                    }
+                }
+            } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
+                cycle_color = true;
+                consumed = 1;
+            } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
+                cycle_alpha = true;
+                consumed = 1;
+            } else if (SDL_isdigit(*argv[i])) {
+                num_objects = SDL_atoi(argv[i]);
+                consumed = 1;
+            }
+        }
+        if (consumed < 0) {
+            static const char *options[] = {
+                "[--blend none|blend|blend_premultiplied|add|add_premultiplied|mod|mul]",
+                "[--cyclecolor]",
+                "[--cyclealpha]",
+                "[num_objects]",
+                NULL
+            };
+            SDLTest_CommonLogUsage(state, argv[0], options);
+            return 1;
+        }
+        i += consumed;
+    }
+    if (!SDLTest_CommonInit(state)) {
+        return 2;
+    }
+
+    /* Create the windows and initialize the renderers */
+    for (i = 0; i < state->num_windows; ++i) {
+        SDL_Renderer *renderer = state->renderers[i];
+        SDL_SetRenderDrawBlendMode(renderer, blendMode);
+        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
+        SDL_RenderClear(renderer);
+    }
+
+    /* Main render loop */
+    frames = 0;
+    next_fps_check = SDL_GetTicks() + fps_check_delay;
+    done = 0;
+
+#ifdef SDL_PLATFORM_EMSCRIPTEN
+    emscripten_set_main_loop(loop, 0, 1);
+#else
+    while (!done) {
+        loop();
+    }
+#endif
+
+    SDLTest_CleanupTextDrawing();
+    SDLTest_CommonQuit(state);
+
+    return 0;
+}