From ee61062aa13d5b7c090d22cb7c01494a5c784e37 Mon Sep 17 00:00:00 2001
From: Arisotura <thetotalworm@gmail.com>
Date: Sun, 17 Apr 2022 14:53:57 +0200
Subject: [PATCH] basic provision for feeding external pictures to the cameras

---
 src/DSi_Camera.cpp           | 24 ++++++++++++++++++++++++
 src/DSi_Camera.h             |  2 ++
 src/NDS.cpp                  | 15 +++++++++++++++
 src/NDS.h                    |  1 +
 src/frontend/qt_sdl/main.cpp |  8 +++++++-
 5 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/src/DSi_Camera.cpp b/src/DSi_Camera.cpp
index f2d75211..06549396 100644
--- a/src/DSi_Camera.cpp
+++ b/src/DSi_Camera.cpp
@@ -758,6 +758,30 @@ void Camera::MCU_Write(u16 addr, u8 val)
     MCURegs[addr] = val;
 }
 
+
+void Camera::InputFrame(u32* data, int width, int height)
+{
+    // TODO: double-buffering?
+
+    if (width == 640 && height == 480)
+    {
+        memcpy(FrameBuffer, data, 640*480*sizeof(u32));
+        return;
+    }
+
+    for (int dy = 0; dy < 480; dy++)
+    {
+        int sy = (dy * height) / 480;
+
+        for (int dx = 0; dx < 640; dx++)
+        {
+            int sx = (dx * width) / 640;
+
+            FrameBuffer[dy*640 + dx] = data[sy*width + sx];
+        }
+    }
+}
+
 }
 
 
diff --git a/src/DSi_Camera.h b/src/DSi_Camera.h
index 554d41f5..ed2342be 100644
--- a/src/DSi_Camera.h
+++ b/src/DSi_Camera.h
@@ -68,6 +68,8 @@ public:
     u8 I2C_Read(bool last);
     void I2C_Write(u8 val, bool last);
 
+    void InputFrame(u32* data, int width, int height);
+
     u32 Num;
 
 private:
diff --git a/src/NDS.cpp b/src/NDS.cpp
index b6d0171c..9d436cbb 100644
--- a/src/NDS.cpp
+++ b/src/NDS.cpp
@@ -1261,6 +1261,21 @@ void SetLidClosed(bool closed)
     }
 }
 
+void CamInputFrame(int cam, u32* data, int width, int height)
+{
+    // TODO: support things like the GBA-slot camera addon
+    // whenever these are emulated
+
+    if (ConsoleType == 1)
+    {
+        switch (cam)
+        {
+        case 0: return DSi_CamModule::Camera0->InputFrame(data, width, height);
+        case 1: return DSi_CamModule::Camera1->InputFrame(data, width, height);
+        }
+    }
+}
+
 void MicInputFrame(s16* data, int samples)
 {
     return SPI_TSC::MicInputFrame(data, samples);
diff --git a/src/NDS.h b/src/NDS.h
index 80a1c6d7..5b6e083e 100644
--- a/src/NDS.h
+++ b/src/NDS.h
@@ -260,6 +260,7 @@ void SetKeyMask(u32 mask);
 bool IsLidClosed();
 void SetLidClosed(bool closed);
 
+void CamInputFrame(int cam, u32* data, int width, int height);
 void MicInputFrame(s16* data, int samples);
 
 void ScheduleEvent(u32 id, bool periodic, s32 delay, void (*func)(u32), u32 param);
diff --git a/src/frontend/qt_sdl/main.cpp b/src/frontend/qt_sdl/main.cpp
index c6eebf29..4282f644 100644
--- a/src/frontend/qt_sdl/main.cpp
+++ b/src/frontend/qt_sdl/main.cpp
@@ -430,6 +430,9 @@ void EmuThread::run()
 
     char melontitle[100];
 
+    QImage testimg("test.jpg");
+    QImage testimg_conv = testimg.convertToFormat(QImage::Format_RGB32);
+
     while (EmuRunning != 0)
     {
         Input::Process();
@@ -510,6 +513,9 @@ void EmuThread::run()
                 OSD::AddMessage(0, lid ? "Lid closed" : "Lid opened");
             }
 
+            // camera input test
+            NDS::CamInputFrame(0, (u32*)testimg_conv.bits(), testimg_conv.width(), testimg_conv.height());
+
             // microphone input
             micProcess();
 
@@ -1834,7 +1840,7 @@ void MainWindow::keyPressEvent(QKeyEvent* event)
     if (event->isAutoRepeat()) return;
 
     // TODO!! REMOVE ME IN RELEASE BUILDS!!
-    //if (event->key() == Qt::Key_F11) NDS::debug(0);
+    if (event->key() == Qt::Key_F11) NDS::debug(0);
 
     Input::KeyPress(event);
 }