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GPU: Implemented register 0x22A.

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This is the equivalent of the "first" parameter in glDrawArrays, it tells the GPU the vertex index at which to start rendering.

Register 0x22A doesn't affect indexed rendering.
This commit is contained in:
Subv 2015-08-22 22:09:00 -05:00
parent ef7eb8bc4c
commit 12a11472f1
2 changed files with 8 additions and 2 deletions
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3
src/video_core/command_processor.cpp
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@ -231,7 +231,8 @@ static void WritePicaReg(u32 id, u32 value, u32 mask) {
for (unsigned int index = 0; index < regs.num_vertices; ++index)
{
unsigned int vertex = is_indexed ? (index_u16 ? index_address_16[index] : index_address_8[index]) : index;
// Indexed rendering doesn't use the start offset
unsigned int vertex = is_indexed ? (index_u16 ? index_address_16[index] : index_address_8[index]) : (index + regs.vertex_offset);
// -1 is a common special value used for primitive restart. Since it's unknown if
// the PICA supports it, and it would mess up the caching, guard against it here.

7
src/video_core/pica.h
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@ -757,7 +757,12 @@ struct Regs {
// Number of vertices to render
u32 num_vertices;
INSERT_PADDING_WORDS(0x5);
INSERT_PADDING_WORDS(0x1);
// The index of the first vertex to render
u32 vertex_offset;
INSERT_PADDING_WORDS(0x3);
// These two trigger rendering of triangles
u32 trigger_draw;