diff options
| author |  Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> | 2015-05-22 01:05:34 +0200 |
|---|---|---|
| committer | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> | 2015-06-28 14:31:13 +0100 |
| commit | 8ee814ec27b5ad8949e7e0c55ef0b6fc47bb88ad (patch) | |
| tree | 1a13bdaf8c79b161fd507d3073f9bb0ffdd3448e /src/core/hw | |
| parent | 6a0eea93e0dd46e6c2eb95b7c7e8beacd6534d6a (diff) | |
GPU: Use shifts instead of multiplications to calculate the actual size of the output.
Diffstat (limited to 'src/core/hw')
| -rw-r--r-- | src/core/hw/gpu.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/core/hw/gpu.cpp b/src/core/hw/gpu.cpp index 7471def5..2bc65000 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, |