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Pica/Rasterizer: Implement backface culling.

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This commit is contained in:
Tony Wasserka 2014-12-13 21:39:42 +01:00
parent 3b78af904e
commit 0f49424022
2 changed files with 36 additions and 10 deletions
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16
src/video_core/pica.h
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@ -50,7 +50,19 @@ struct Regs {
u32 trigger_irq;
INSERT_PADDING_WORDS(0x30);
INSERT_PADDING_WORDS(0x2f);
enum class CullMode : u32 {
// Select which polygons are considered to be "frontfacing".
KeepAll = 0,
KeepClockWise = 1,
KeepCounterClockWise = 2,
// TODO: What does the third value imply?
};
union {
BitField<0, 2, CullMode> cull_mode;
};
BitField<0, 24, u32> viewport_size_x;
@ -659,6 +671,7 @@ struct Regs {
} while(false)
ADD_FIELD(trigger_irq);
ADD_FIELD(cull_mode);
ADD_FIELD(viewport_size_x);
ADD_FIELD(viewport_size_y);
ADD_FIELD(viewport_depth_range);
@ -730,6 +743,7 @@ private:
#define ASSERT_REG_POSITION(field_name, position) static_assert(offsetof(Regs, field_name) == position * 4, "Field "#field_name" has invalid position")
ASSERT_REG_POSITION(trigger_irq, 0x10);
ASSERT_REG_POSITION(cull_mode, 0x40);
ASSERT_REG_POSITION(viewport_size_x, 0x41);
ASSERT_REG_POSITION(viewport_size_y, 0x43);
ASSERT_REG_POSITION(viewport_depth_range, 0x4d);