basics working on the playdate

examples/playdate-project-example/.gitignore

@@ -0,0 +1,2 @@
+clay_playdate_example.pdx
+Source/pdex.dylib

examples/playdate-project-example/CmakeLists.txt

@@ -0,0 +1,40 @@
+cmake_minimum_required(VERSION 3.27)
+set(CMAKE_C_STANDARD 99)
+
+set(ENVSDK $ENV{PLAYDATE_SDK_PATH})
+
+if (NOT ${ENVSDK} STREQUAL "")
+        # Convert path from Windows
+        file(TO_CMAKE_PATH ${ENVSDK} SDK)
+else()
+        execute_process(
+                        COMMAND bash -c "egrep '^\\s*SDKRoot' $HOME/.Playdate/config"
+                        COMMAND head -n 1
+                        COMMAND cut -c9-
+                        OUTPUT_VARIABLE SDK
+                        OUTPUT_STRIP_TRAILING_WHITESPACE
+        )
+endif()
+
+if (NOT EXISTS ${SDK})
+        message(FATAL_ERROR "SDK Path not found; set ENV value PLAYDATE_SDK_PATH")
+        return()
+endif()
+
+set(CMAKE_CONFIGURATION_TYPES "Debug;Release")
+set(CMAKE_XCODE_GENERATE_SCHEME TRUE)
+
+# Game Name Customization
+set(PLAYDATE_GAME_NAME clay_playdate_example)
+set(PLAYDATE_GAME_DEVICE clay_playdate_example_DEVICE)
+
+project(${PLAYDATE_GAME_NAME} C ASM)
+
+if (TOOLCHAIN STREQUAL "armgcc")
+        add_executable(${PLAYDATE_GAME_DEVICE} main.c)
+else()
+        add_library(${PLAYDATE_GAME_NAME} SHARED main.c)
+endif()
+
+include(${SDK}/C_API/buildsupport/playdate_game.cmake)
+

examples/playdate-project-example/Source/pdxinfo

@@ -0,0 +1,5 @@
+name=Clay Playdate Example
+author=Matthew Jennings
+description=A small demo of Clay running on the Playdate
+bundleID=dev.mattahj.clay_example
+imagePath=

examples/playdate-project-example/main.c

@@ -0,0 +1,103 @@
+
+#include "pd_api.h"
+#define CLAY_IMPLEMENTATION
+#include "../../clay.h"
+
+#include "../../renderers/playdate/clay_renderer_playdate.c"
+#include "../shared-layouts/clay-video-demo.c"
+
+static int update(void *userdata);
+const char *fontpath = "/System/Fonts/Asheville-Sans-14-Bold.pft";
+LCDFont *font = NULL;
+
+void HandleClayErrors(Clay_ErrorData errorData) {}
+
+struct TextUserData {
+  LCDFont *font;
+  PlaydateAPI *pd;
+};
+
+static struct TextUserData gTextUserData = {.font = NULL, .pd = NULL};
+static ClayVideoDemo_Data demoData;
+
+static Clay_Dimensions PlayDate_MeasureText(Clay_StringSlice text,
+                                            Clay_TextElementConfig *config,
+                                            void *userData) {
+  // TODO: playdate needs to load fonts at the given size, so need to do that
+  // before we can use different font sizes!
+  struct TextUserData *textUserData = userData;
+  int width = textUserData->pd->graphics->getTextWidth(
+      textUserData->font, text.chars,
+      utf8_count_codepoints(text.chars, text.length), kUTF8Encoding, 0);
+  int height = textUserData->pd->graphics->getFontHeight(textUserData->font);
+  return (Clay_Dimensions){
+      .width = (float)width,
+      .height = (float)height,
+  };
+}
+
+#ifdef _WINDLL
+__declspec(dllexport)
+#endif
+int eventHandler(PlaydateAPI* pd, PDSystemEvent event, uint32_t arg)
+{
+  (void)arg; // arg is currently only used for event = kEventKeyPressed
+
+  if (event == kEventInit) {
+    const char *err;
+    font = pd->graphics->loadFont(fontpath, &err);
+
+    if (font == NULL)
+      pd->system->error("%s:%i Couldn't load font %s: %s", __FILE__, __LINE__,
+                        fontpath, err);
+
+    gTextUserData.pd = pd;
+    gTextUserData.font = font;
+
+    // Note: If you set an update callback in the kEventInit handler, the system
+    // assumes the game is pure C and doesn't run any Lua code in the game
+    pd->system->setUpdateCallback(update, pd);
+
+    uint64_t totalMemorySize = Clay_MinMemorySize();
+    Clay_Arena clayMemory = Clay_CreateArenaWithCapacityAndMemory(
+        totalMemorySize, pd->system->realloc(NULL, totalMemorySize));
+    Clay_Initialize(clayMemory,
+                    (Clay_Dimensions){(float)pd->display->getWidth(),
+                                      (float)pd->display->getHeight()},
+                    (Clay_ErrorHandler){HandleClayErrors});
+    Clay_SetMeasureTextFunction(PlayDate_MeasureText, &gTextUserData);
+    demoData = ClayVideoDemo_Initialize(pd);
+  }
+
+  return 0;
+}
+
+#define TEXT_WIDTH 86
+#define TEXT_HEIGHT 16
+
+int x = (400 - TEXT_WIDTH) / 2;
+int y = (240 - TEXT_HEIGHT) / 2;
+int dx = 1;
+int dy = 2;
+
+static int update(void *userdata) {
+  PlaydateAPI *pd = userdata;
+
+  pd->graphics->clear(kColorWhite);
+  pd->graphics->setFont(font);
+
+  Clay_SetPointerState((Clay_Vector2){.x = pd->display->getWidth() / 2.0f,
+                                      .y = pd->display->getHeight() / 2.0f},
+                       false);
+  float crankDelta = pd->system->getCrankChange();
+  Clay_UpdateScrollContainers(true, (Clay_Vector2){0, crankDelta * 0.25f},
+                              pd->system->getElapsedTime());
+  Clay_RenderCommandArray renderCommands =
+      ClayVideoDemo_CreateLayout(&demoData);
+
+  Clay_Playdate_Render(pd, renderCommands, font);
+
+  pd->system->drawFPS(0, 0);
+
+  return 1;
+}