[Renderers/Playdate] Playdate console example (#404)

examples/playdate-project-example/main.c

@@ -0,0 +1,115 @@
+#include "pd_api.h"
+#define CLAY_IMPLEMENTATION
+#include "../../clay.h"
+
+#include "../../renderers/playdate/clay_renderer_playdate.c"
+#include "clay-video-demo-playdate.c"
+
+static int update(void *userdata);
+
+#define NUM_FONTS 2
+const char *fontsToLoad[NUM_FONTS] = {
+    "/System/Fonts/Asheville-Sans-14-Bold.pft",
+    "/System/Fonts/Roobert-10-Bold.pft"
+};
+
+void HandleClayErrors(Clay_ErrorData errorData) {}
+
+struct TextUserData {
+    LCDFont *font[NUM_FONTS];
+    PlaydateAPI *pd;
+};
+
+static struct TextUserData textUserData = { .font = { NULL }, .pd = NULL };
+
+static Clay_Dimensions PlayDate_MeasureText(Clay_StringSlice text, Clay_TextElementConfig *config, void *userData) {
+    struct TextUserData *textUserData = userData;
+    int width = textUserData->pd->graphics->getTextWidth(
+        textUserData->font[config->fontId],
+        text.chars,
+        Clay_Playdate_CountUtf8Codepoints(text.chars, text.length),
+        kUTF8Encoding,
+        0
+    );
+    int height = textUserData->pd->graphics->getFontHeight(textUserData->font[config->fontId]);
+    return (Clay_Dimensions){
+        .width = (float)width,
+        .height = (float)height,
+    };
+}
+
+#ifdef _WINDLL
+__declspec(dllexport)
+#endif
+int eventHandler(PlaydateAPI* pd, PDSystemEvent event, uint32_t eventArg) {
+    if (event == kEventInit) {
+        const char *err;
+        for (int i = 0; i < NUM_FONTS; ++i) {
+
+            textUserData.font[i] = pd->graphics->loadFont(fontsToLoad[i], &err);
+            if (textUserData.font[i] == NULL) {
+                pd->system->error("%s:%i Couldn't load font %s: %s", __FILE__, __LINE__, fontsToLoad[i], err);
+            }
+        }
+
+        textUserData.pd = pd;
+        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, &textUserData);
+        ClayVideoDemoPlaydate_Initialize(pd);
+    }
+
+    return 0;
+}
+
+int selectedDocumentIndex = 0;
+#define WRAP_RANGE(x, N) ((((x) % (N)) + (N)) % (N))
+
+static int update(void *userdata) {
+    PlaydateAPI *pd = userdata;
+    PDButtons pushedButtons;
+    pd->system->getButtonState(NULL, &pushedButtons, NULL);
+
+    if (pushedButtons & kButtonDown) {
+        selectedDocumentIndex = WRAP_RANGE(selectedDocumentIndex + 1, MAX_DOCUMENTS);
+    } else if (pushedButtons & kButtonUp) {
+        selectedDocumentIndex = WRAP_RANGE(selectedDocumentIndex - 1, MAX_DOCUMENTS);
+    }
+
+    pd->graphics->clear(kColorWhite);
+
+    // A bit hacky, setting the cursor on to the document view so it can be
+    // scrolled..
+    Clay_SetPointerState(
+        (Clay_Vector2){
+            .x = pd->display->getWidth() / 2.0f,
+            .y = pd->display->getHeight() / 2.0f
+        },
+        false
+    );
+
+    float crankDelta = pd->system->getCrankChange();
+    Clay_UpdateScrollContainers(
+        false,
+        (Clay_Vector2){ 0, -crankDelta * 0.25f },
+        pd->system->getElapsedTime()
+    );
+
+    Clay_RenderCommandArray renderCommands = ClayVideoDemoPlaydate_CreateLayout(selectedDocumentIndex);
+    Clay_Playdate_Render(pd, renderCommands, textUserData.font);
+
+    return 1;
+}