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HostDisplay: Use floats internally for draw rectangle calculation

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This commit is contained in:
Albert Liu 2020-11-14 17:23:22 -08:00
parent e0f3a4f17b
commit 11fbf26045
2 changed files with 29 additions and 24 deletions
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49
src/core/host_display.cpp
View file

@ -135,9 +135,10 @@ void HostDisplay::ClearSoftwareCursor()
m_cursor_texture_scale = 1.0f; m_cursor_texture_scale = 1.0f;
} }
void HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32* out_left, s32* out_top, s32* out_width, void HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, float* out_left, float* out_top,
s32* out_height, s32* out_left_padding, s32* out_top_padding, float* out_scale, float* out_width, float* out_height, float* out_left_padding,
float* out_x_scale, bool apply_aspect_ratio /* = true */) const float* out_top_padding, float* out_scale, float* out_x_scale,
bool apply_aspect_ratio /* = true */) const
{ {
const float x_scale = const float x_scale =
apply_aspect_ratio ? apply_aspect_ratio ?
@ -166,24 +167,25 @@ void HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32* ou
if (out_left_padding) if (out_left_padding)
{ {
if (m_display_integer_scaling) if (m_display_integer_scaling)
*out_left_padding = std::max<s32>((window_width - static_cast<s32>(display_width * scale)) / 2, 0); *out_left_padding = std::max<float>((static_cast<float>(window_width) - display_width * scale) / 2.0f, 0.0f);
else else
*out_left_padding = 0; *out_left_padding = 0.0f;
} }
if (out_top_padding) if (out_top_padding)
{ {
switch (m_display_alignment) switch (m_display_alignment)
{ {
case Alignment::LeftOrTop: case Alignment::LeftOrTop:
*out_top_padding = 0; *out_top_padding = 0.0f;
break; break;
case Alignment::Center: case Alignment::Center:
*out_top_padding = std::max<s32>((window_height - static_cast<s32>(display_height * scale)) / 2, 0); *out_top_padding =
std::max<float>((static_cast<float>(window_height) - (display_height * scale)) / 2.0f, 0.0f);
break; break;
case Alignment::RightOrBottom: case Alignment::RightOrBottom:
*out_top_padding = std::max<s32>(window_height - static_cast<s32>(display_height * scale), 0); *out_top_padding = std::max<float>(static_cast<float>(window_height) - (display_height * scale), 0.0f);
break; break;
} }
} }
@ -200,15 +202,16 @@ void HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32* ou
switch (m_display_alignment) switch (m_display_alignment)
{ {
case Alignment::LeftOrTop: case Alignment::LeftOrTop:
*out_left_padding = 0; *out_left_padding = 0.0f;
break; break;
case Alignment::Center: case Alignment::Center:
*out_left_padding = std::max<s32>((window_width - static_cast<s32>(display_width * scale)) / 2, 0); *out_left_padding =
std::max<float>((static_cast<float>(window_width) - (display_width * scale)) / 2.0f, 0.0f);
break; break;
case Alignment::RightOrBottom: case Alignment::RightOrBottom:
*out_left_padding = std::max<s32>(window_width - static_cast<s32>(display_width * scale), 0); *out_left_padding = std::max<float>(static_cast<float>(window_width) - (display_width * scale), 0.0f);
break; break;
} }
} }
@ -216,16 +219,16 @@ void HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32* ou
if (out_top_padding) if (out_top_padding)
{ {
if (m_display_integer_scaling) if (m_display_integer_scaling)
*out_top_padding = std::max<s32>((window_height - static_cast<s32>(display_height * scale)) / 2, 0); *out_top_padding = std::max<float>((static_cast<float>(window_height) - (display_height * scale)) / 2.0f, 0.0f);
else else
*out_top_padding = 0; *out_top_padding = 0.0f;
} }
} }
*out_width = static_cast<s32>(active_width * scale); *out_width = active_width * scale;
*out_height = static_cast<s32>(active_height * scale); *out_height = active_height * scale;
*out_left = static_cast<s32>(active_left * scale); *out_left = active_left * scale;
*out_top = static_cast<s32>(active_top * scale); *out_top = active_top * scale;
if (out_scale) if (out_scale)
*out_scale = scale; *out_scale = scale;
} }
@ -233,10 +236,12 @@ void HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32* ou
std::tuple<s32, s32, s32, s32> HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32 top_margin, std::tuple<s32, s32, s32, s32> HostDisplay::CalculateDrawRect(s32 window_width, s32 window_height, s32 top_margin,
bool apply_aspect_ratio /* = true */) const bool apply_aspect_ratio /* = true */) const
{ {
s32 left, top, width, height, left_padding, top_padding; float left, top, width, height, left_padding, top_padding;
CalculateDrawRect(window_width, window_height - top_margin, &left, &top, &width, &height, &left_padding, &top_padding, CalculateDrawRect(window_width, window_height - top_margin, &left, &top, &width, &height, &left_padding, &top_padding,
nullptr, nullptr, apply_aspect_ratio); nullptr, nullptr, apply_aspect_ratio);
return std::make_tuple(left + left_padding, top + top_padding + top_margin, width, height);
return std::make_tuple(static_cast<s32>(left + left_padding), static_cast<s32>(top + top_padding) + top_margin,
static_cast<s32>(width), static_cast<s32>(height));
} }
std::tuple<s32, s32, s32, s32> HostDisplay::CalculateSoftwareCursorDrawRect() const std::tuple<s32, s32, s32, s32> HostDisplay::CalculateSoftwareCursorDrawRect() const
@ -262,14 +267,14 @@ std::tuple<float, float> HostDisplay::ConvertWindowCoordinatesToDisplayCoordinat
s32 window_width, s32 window_height, s32 window_width, s32 window_height,
s32 top_margin) const s32 top_margin) const
{ {
s32 left, top, width, height, left_padding, top_padding; float left, top, width, height, left_padding, top_padding;
float scale, x_scale; float scale, x_scale;
CalculateDrawRect(window_width, window_height - top_margin, &left, &top, &width, &height, &left_padding, &top_padding, CalculateDrawRect(window_width, window_height - top_margin, &left, &top, &width, &height, &left_padding, &top_padding,
&scale, &x_scale); &scale, &x_scale);
// convert coordinates to active display region, then to full display region // convert coordinates to active display region, then to full display region
const float scaled_display_x = static_cast<float>(window_x - (left_padding)); const float scaled_display_x = static_cast<float>(window_x) - left_padding;
const float scaled_display_y = static_cast<float>(window_y - (top_padding + top_margin)); const float scaled_display_y = static_cast<float>(window_y) - top_padding + static_cast<float>(top_margin);
// scale back to internal resolution // scale back to internal resolution
const float display_x = scaled_display_x / scale / x_scale; const float display_x = scaled_display_x / scale / x_scale;

4
src/core/host_display.h
View file

@ -213,8 +213,8 @@ protected:
ALWAYS_INLINE bool HasSoftwareCursor() const { return static_cast<bool>(m_cursor_texture); } ALWAYS_INLINE bool HasSoftwareCursor() const { return static_cast<bool>(m_cursor_texture); }
ALWAYS_INLINE bool HasDisplayTexture() const { return (m_display_texture_handle != nullptr); } ALWAYS_INLINE bool HasDisplayTexture() const { return (m_display_texture_handle != nullptr); }
void CalculateDrawRect(s32 window_width, s32 window_height, s32* out_left, s32* out_top, s32* out_width, void CalculateDrawRect(s32 window_width, s32 window_height, float* out_left, float* out_top, float* out_width,
s32* out_height, s32* out_left_padding, s32* out_top_padding, float* out_scale, float* out_height, float* out_left_padding, float* out_top_padding, float* out_scale,
float* out_x_scale, bool apply_aspect_ratio = true) const; float* out_x_scale, bool apply_aspect_ratio = true) const;
std::tuple<s32, s32, s32, s32> CalculateSoftwareCursorDrawRect() const; std::tuple<s32, s32, s32, s32> CalculateSoftwareCursorDrawRect() const;