From 3c4c35e6e5cf23310212bfd4719139175fb54784 Mon Sep 17 00:00:00 2001
From: yellows8 <yellows8@users.noreply.github.com>
Date: Thu, 22 Feb 2018 20:31:51 -0500
Subject: [PATCH] Added gfxSetDrawFlip() and gfxConfigureTransform().

---
 nx/include/switch/gfx/gfx.h |  9 ++++++++-
 nx/source/gfx/gfx.c         | 14 +++++++++++++-
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/nx/include/switch/gfx/gfx.h b/nx/include/switch/gfx/gfx.h
index f1c93e64..8a39503c 100644
--- a/nx/include/switch/gfx/gfx.h
+++ b/nx/include/switch/gfx/gfx.h
@@ -83,6 +83,12 @@ size_t gfxGetFramebufferSize(void);
 /// Sets the \ref GfxMode.
 void gfxSetMode(GfxMode mode);
 
+/// Controls whether a vertical-flip is done when determining the pixel-offset within the actual framebuffer. By default this is enabled.
+void gfxSetDrawFlip(bool flip);
+
+/// Configures transform. See the NATIVE_WINDOW_TRANSFORM_* enums in buffer_producer.h. The default is NATIVE_WINDOW_TRANSFORM_FLIP_V.
+void gfxConfigureTransform(u32 transform);
+
 /// Flushes the framebuffer in the data cache. When \ref GfxMode is GfxMode_LinearDouble, this also transfers the linear-framebuffer to the actual framebuffer.
 void gfxFlushBuffers(void);
 
@@ -94,10 +100,11 @@ static inline u32 gfxGetFramebufferDisplayOffset(u32 x, u32 y) {
 
     extern size_t g_gfx_framebuf_aligned_width;
     extern size_t g_gfx_framebuf_display_height;
+    extern bool g_gfx_drawflip;
 
     //if (x >= g_gfx_framebuf_width || y >= g_gfx_framebuf_display_height) return (gfxGetFramebufferSize()-4)/4;//Return the last pixel-offset in the buffer, the data located here is not displayed due to alignment. (Disabled for perf)
 
-    y = g_gfx_framebuf_display_height-1-y;
+    if (g_gfx_drawflip) y = g_gfx_framebuf_display_height-1-y;
 
     tmp_pos = ((y & 127) / 16) + (x/16*8) + ((y/16/8)*(g_gfx_framebuf_aligned_width/16*8));
     tmp_pos *= 16*16 * 4;
diff --git a/nx/source/gfx/gfx.c b/nx/source/gfx/gfx.c
index a70ae5fe..8bfa2208 100644
--- a/nx/source/gfx/gfx.c
+++ b/nx/source/gfx/gfx.c
@@ -40,6 +40,8 @@ size_t g_gfx_framebuf_display_width=0, g_gfx_framebuf_display_height=0;
 size_t g_gfx_singleframebuf_size=0;
 size_t g_gfx_singleframebuf_linear_size=0;
 
+bool g_gfx_drawflip = true;
+
 static AppletHookCookie g_gfx_autoresolution_applethookcookie;
 static bool g_gfx_autoresolution_enabled;
 
@@ -55,7 +57,6 @@ extern nvioctl_fence g_nvgfx_nvhostgpu_gpfifo_fence;
 
 //static Result _gfxGetDisplayResolution(u64 *width, u64 *height);
 
-//TODO: Let the user configure some of this?
 static bufferProducerQueueBufferInput g_gfxQueueBufferData = {
     .timestamp = 0x0,
     .isAutoTimestamp = 0x1,
@@ -178,6 +179,9 @@ static Result _gfxInit(ViServiceType servicetype, const char *DisplayName, u32 L
     g_gfxFramebufSize = 0;
     g_gfxMode = GfxMode_LinearDouble;
 
+    g_gfx_drawflip = true;
+    g_gfxQueueBufferData.transform = NATIVE_WINDOW_TRANSFORM_FLIP_V;
+
     memset(g_gfx_ProducerSlotsRequested, 0, sizeof(g_gfx_ProducerSlotsRequested));
     memset(&g_gfx_DequeueBuffer_fence, 0, sizeof(g_gfx_DequeueBuffer_fence));
 
@@ -539,6 +543,14 @@ void gfxSetMode(GfxMode mode) {
     g_gfxMode = mode;
 }
 
+void gfxSetDrawFlip(bool flip) {
+    g_gfx_drawflip = flip;
+}
+
+void gfxConfigureTransform(u32 transform) {
+    g_gfxQueueBufferData.transform = transform;
+}
+
 void gfxFlushBuffers(void) {
     u32 *actual_framebuf = (u32*)&g_gfxFramebuf[g_gfxCurrentBuffer*g_gfx_singleframebuf_size];