From 8ee814ec27b5ad8949e7e0c55ef0b6fc47bb88ad Mon Sep 17 00:00:00 2001 From: Emmanuel Gil Peyrot Date: Fri, 22 May 2015 01:05:34 +0200 Subject: [PATCH] GPU: Use shifts instead of multiplications to calculate the actual size of the output. --- src/core/hw/gpu.cpp | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/src/core/hw/gpu.cpp b/src/core/hw/gpu.cpp index 7471def578..2bc6500026 100644 --- a/src/core/hw/gpu.cpp +++ b/src/core/hw/gpu.cpp @@ -125,11 +125,11 @@ inline void Write(u32 addr, const T data) { break; } - unsigned horizontal_scale = (config.scaling != config.NoScale) ? 2 : 1; - unsigned vertical_scale = (config.scaling == config.ScaleXY) ? 2 : 1; + bool horizontal_scale = config.scaling != config.NoScale; + bool vertical_scale = config.scaling == config.ScaleXY; - u32 output_width = config.output_width / horizontal_scale; - u32 output_height = config.output_height / vertical_scale; + u32 output_width = config.output_width >> horizontal_scale; + u32 output_height = config.output_height >> vertical_scale; u32 input_size = config.input_width * config.input_height * GPU::Regs::BytesPerPixel(config.input_format); u32 output_size = output_width * output_height * GPU::Regs::BytesPerPixel(config.output_format); @@ -161,8 +161,8 @@ inline void Write(u32 addr, const T data) { // 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; + u32 input_x = x << horizontal_scale; + u32 input_y = y << vertical_scale; if (config.flip_vertically) { // Flip the y value of the output data,