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GPU: Flip the triangle front face winding if the GPU is configured to not flip the triangles. 

OpenGL's default behavior is already correct when the GPU is configured to flip the triangles.

This fixes 1-2 Switch's splash screen.
master
Subv 2018-07-04 10:26:46 +07:00
parent 81a44d38ee
commit c1bebdef5e
2 changed files with 29 additions and 3 deletions
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22
src/video_core/engines/maxwell_3d.h
Unescape Escape View File

@ -478,7 +478,9 @@ public:
u32 depth_write_enabled;
INSERT_PADDING_WORDS(0x8);
INSERT_PADDING_WORDS(0x7);
u32 d3d_cull_mode;
BitField<0, 3, ComparisonOp> depth_test_func;
@ -498,7 +500,13 @@ public:
u32 enable[NumRenderTargets];
} blend;
INSERT_PADDING_WORDS(0x2D);
INSERT_PADDING_WORDS(0xB);
union {
BitField<4, 1, u32> triangle_rast_flip;
} screen_y_control;
INSERT_PADDING_WORDS(0x21);
u32 vb_element_base;
@ -528,7 +536,12 @@ public:
}
} tic;
INSERT_PADDING_WORDS(0x22);
INSERT_PADDING_WORDS(0x21);
union {
BitField<2, 1, u32> coord_origin;
BitField<3, 10, u32> enable;
} point_coord_replace;
struct {
u32 code_address_high;
@ -818,11 +831,14 @@ ASSERT_REG_POSITION(rt_control, 0x487);
ASSERT_REG_POSITION(depth_test_enable, 0x4B3);
ASSERT_REG_POSITION(independent_blend_enable, 0x4B9);
ASSERT_REG_POSITION(depth_write_enabled, 0x4BA);
ASSERT_REG_POSITION(d3d_cull_mode, 0x4C2);
ASSERT_REG_POSITION(depth_test_func, 0x4C3);
ASSERT_REG_POSITION(blend, 0x4CF);
ASSERT_REG_POSITION(screen_y_control, 0x4EB);
ASSERT_REG_POSITION(vb_element_base, 0x50D);
ASSERT_REG_POSITION(tsc, 0x557);
ASSERT_REG_POSITION(tic, 0x55D);
ASSERT_REG_POSITION(point_coord_replace, 0x581);
ASSERT_REG_POSITION(code_address, 0x582);
ASSERT_REG_POSITION(draw, 0x585);
ASSERT_REG_POSITION(index_array, 0x5F2);

10
src/video_core/renderer_opengl/gl_rasterizer.cpp
Unescape Escape View File

@ -771,6 +771,16 @@ void RasterizerOpenGL::SyncCullMode() {
if (state.cull.enabled) {
state.cull.front_face = MaxwellToGL::FrontFace(regs.cull.front_face);
state.cull.mode = MaxwellToGL::CullFace(regs.cull.cull_face);
// If the GPU is configured to flip the rasterized triangles, then we need to flip the
// notion of front and back. Note: We flip the triangles when the value of the register is 0
// because OpenGL already does it for us.
if (regs.screen_y_control.triangle_rast_flip == 0) {
if (state.cull.front_face == GL_CCW)
state.cull.front_face = GL_CW;
else if (state.cull.front_face == GL_CW)
state.cull.front_face = GL_CCW;
}
}
}