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GPU: Calculate the correct viewport dimensions based on the scale and translate registers.

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This is how nouveau calculates the viewport width and height. For some reason some games set 0xFFFF in the VIEWPORT_HORIZ and VIEWPORT_VERT registers, maybe those are a misnomer and actually refer to something else?
This commit is contained in:
Subv 2018-06-04 16:36:54 -05:00
parent 049ce242a4
commit 5d55403f94
2 changed files with 30 additions and 14 deletions
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40
src/video_core/engines/maxwell_3d.h
View file

@ -354,10 +354,35 @@ public:
f32 scale_x;
f32 scale_y;
f32 scale_z;
u32 translate_x;
u32 translate_y;
u32 translate_z;
f32 translate_x;
f32 translate_y;
f32 translate_z;
INSERT_PADDING_WORDS(2);
MathUtil::Rectangle<s32> GetRect() const {
return {
GetX(), // left
GetY() + GetHeight(), // top
GetX() + GetWidth(), // right
GetY() // bottom
};
};
s32 GetX() const {
return static_cast<s32>(std::max(0.0f, translate_x - std::fabs(scale_x)));
}
s32 GetY() const {
return static_cast<s32>(std::max(0.0f, translate_y - std::fabs(scale_y)));
}
s32 GetWidth() const {
return static_cast<s32>(translate_x + std::fabs(scale_x)) - GetX();
}
s32 GetHeight() const {
return static_cast<s32>(translate_y + std::fabs(scale_y)) - GetY();
}
} viewport_transform[NumViewports];
struct {
@ -371,15 +396,6 @@ public:
};
float depth_range_near;
float depth_range_far;
MathUtil::Rectangle<s32> GetRect() const {
return {
static_cast<s32>(x), // left
static_cast<s32>(y + height), // top
static_cast<s32>(x + width), // right
static_cast<s32>(y) // bottom
};
};
} viewport[NumViewports];
INSERT_PADDING_WORDS(0x1D);

4
src/video_core/renderer_opengl/gl_rasterizer.cpp
View file

@ -298,7 +298,7 @@ void RasterizerOpenGL::DrawArrays() {
const bool has_stencil = false;
const bool using_color_fb = true;
const bool using_depth_fb = false;
const MathUtil::Rectangle<s32> viewport_rect{regs.viewport[0].GetRect()};
const MathUtil::Rectangle<s32> viewport_rect{regs.viewport_transform[0].GetRect()};
const bool write_color_fb =
state.color_mask.red_enabled == GL_TRUE || state.color_mask.green_enabled == GL_TRUE ||
@ -702,7 +702,7 @@ void RasterizerOpenGL::BindFramebufferSurfaces(const Surface& color_surface,
void RasterizerOpenGL::SyncViewport(const MathUtil::Rectangle<u32>& surfaces_rect, u16 res_scale) {
const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
const MathUtil::Rectangle<s32> viewport_rect{regs.viewport[0].GetRect()};
const MathUtil::Rectangle<s32> viewport_rect{regs.viewport_transform[0].GetRect()};
state.viewport.x = static_cast<GLint>(surfaces_rect.left) + viewport_rect.left * res_scale;
state.viewport.y = static_cast<GLint>(surfaces_rect.bottom) + viewport_rect.bottom * res_scale;