From fb8f47060bb9c7d6b77824a50782e05b37ad0281 Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Sat, 14 Mar 2015 14:40:40 -0500
Subject: [PATCH] GPU: Implemented the flip_data (bit 0) bit in display
transfers.
---
src/core/hw/gpu.cpp | 19 ++++++++++++++-----
src/core/hw/gpu.h | 2 +-
2 files changed, 15 insertions(+), 6 deletions(-)
diff --git a/src/core/hw/gpu.cpp b/src/core/hw/gpu.cpp
index f933a5e8d3..07443616e8 100644
--- a/src/core/hw/gpu.cpp
+++ b/src/core/hw/gpu.cpp
@@ -146,8 +146,17 @@ inline void Write(u32 addr, const T data) {
for (u32 x = 0; x < output_width; ++x) {
Math::Vec4<u8> src_color = { 0, 0, 0, 0 };
- u32 scaled_x = x * horizontal_scale;
- u32 scaled_y = y * vertical_scale;
+ // Calculate the [x,y] position of the input image
+ // based on the current output position and the scale
+ u32 input_x = x * horizontal_scale;
+ u32 input_y = y * vertical_scale;
+
+ if (config.flip_vertically) {
+ // Flip the y value of the output data,
+ // we do this after calculating the [x,y] position of the input image
+ // to account for the scaling options.
+ y = output_height - y - 1;
+ }
u32 dst_bytes_per_pixel = GPU::Regs::BytesPerPixel(config.output_format);
u32 src_bytes_per_pixel = GPU::Regs::BytesPerPixel(config.input_format);
@@ -159,14 +168,14 @@ inline void Write(u32 addr, const T data) {
u32 coarse_y = y & ~7;
u32 stride = output_width * dst_bytes_per_pixel;
- src_offset = (scaled_x + scaled_y * config.input_width) * src_bytes_per_pixel;
+ src_offset = (input_x + input_y * config.input_width) * src_bytes_per_pixel;
dst_offset = VideoCore::GetMortonOffset(x, y, dst_bytes_per_pixel) + coarse_y * stride;
} else {
// Interpret the input as tiled and the output as linear
- u32 coarse_y = scaled_y & ~7;
+ u32 coarse_y = input_y & ~7;
u32 stride = config.input_width * src_bytes_per_pixel;
- src_offset = VideoCore::GetMortonOffset(scaled_x, scaled_y, src_bytes_per_pixel) + coarse_y * stride;
+ src_offset = VideoCore::GetMortonOffset(input_x, input_y, src_bytes_per_pixel) + coarse_y * stride;
dst_offset = (x + y * output_width) * dst_bytes_per_pixel;
}
diff --git a/src/core/hw/gpu.h b/src/core/hw/gpu.h
index 5b7f0a4e97..e8552d8547 100644
--- a/src/core/hw/gpu.h
+++ b/src/core/hw/gpu.h
@@ -191,7 +191,7 @@ struct Regs {
union {
u32 flags;
- BitField< 0, 1, u32> flip_data; // flips input data horizontally (TODO) if true
+ BitField< 0, 1, u32> flip_vertically; // flips input data vertically
BitField< 1, 1, u32> output_tiled; // Converts from linear to tiled format
BitField< 3, 1, u32> raw_copy; // Copies the data without performing any processing
BitField< 8, 3, PixelFormat> input_format;