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Xbox: Use slightly more memory efficient way of performing draw calls

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This commit is contained in:
UnknownShadow200 2025-09-04 07:54:05 +10:00
parent 06da3877db
commit df692aeaba
2 changed files with 35 additions and 26 deletions
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31
src/xbox/Graphics_Xbox.c
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@ -620,44 +620,23 @@ void Gfx_SetVertexFormat(VertexFormat fmt) {
}
}
static void DrawArrays(int mode, int start, int count) {
uint32_t *p = pb_begin();
p = pb_push1(p, NV097_SET_BEGIN_END, mode);
// NV097_DRAW_ARRAYS_COUNT is an 8 bit mask, so must be <= 256
while (count > 0)
{
int batch_count = min(count, 256);
p = pb_push1(p, NV2A_WRITE_SAME_REGISTER | NV097_DRAW_ARRAYS,
MASK(NV097_DRAW_ARRAYS_COUNT, (batch_count-1)) |
MASK(NV097_DRAW_ARRAYS_START_INDEX, start));
start += batch_count;
count -= batch_count;
}
p = pb_push1(p, NV097_SET_BEGIN_END, NV097_SET_BEGIN_END_OP_END);
pb_end(p);
}
void Gfx_DrawVb_Lines(int verticesCount) {
DrawArrays(NV097_SET_BEGIN_END_OP_LINES, 0, verticesCount);
NV2A_DrawArrays(NV097_SET_BEGIN_END_OP_LINES, 0, verticesCount);
}
static void DrawIndexedVertices(int verticesCount, int startVertex) {
DrawArrays(NV097_SET_BEGIN_END_OP_QUADS, startVertex, verticesCount);
NV2A_DrawArrays(NV097_SET_BEGIN_END_OP_QUADS, startVertex, verticesCount);
}
void Gfx_DrawVb_IndexedTris_Range(int verticesCount, int startVertex, DrawHints hints) {
DrawIndexedVertices(verticesCount, startVertex);
NV2A_DrawArrays(NV097_SET_BEGIN_END_OP_QUADS, startVertex, verticesCount);
}
void Gfx_DrawVb_IndexedTris(int verticesCount) {
DrawIndexedVertices(verticesCount, 0);
NV2A_DrawArrays(NV097_SET_BEGIN_END_OP_QUADS, 0, verticesCount);
}
void Gfx_DrawIndexedTris_T2fC4b(int verticesCount, int startVertex) {
DrawIndexedVertices(verticesCount, startVertex);
NV2A_DrawArrays(NV097_SET_BEGIN_END_OP_QUADS, startVertex, verticesCount);
}

30
src/xbox/nv2a_gpu.h
View File

@ -118,6 +118,36 @@ static CC_INLINE uint32_t* NV2A_set_cull_face_mode(uint32_t* p, int mode) {
}
/*########################################################################################################################*
*-----------------------------------------------------Primitive drawing---------------------------------------------------*
*#########################################################################################################################*/
// NV097_DRAW_ARRAYS_COUNT is an 8 bit mask, so each draw call count must be <= 256
#define DA_BATCH_SIZE 256
static void NV2A_DrawArrays(int mode, unsigned start, unsigned count) {
uint32_t *p = pb_begin();
p = NV2A_push1(p, NV097_SET_BEGIN_END, mode);
// Ceiling division by DA_BATCH_SIZE
unsigned num_batches = (count + DA_BATCH_SIZE - 1) / DA_BATCH_SIZE;
*p++ = NV2A_3D_COMMAND(NV2A_WRITE_SAME_REGISTER | NV097_DRAW_ARRAYS, num_batches);
while (count > 0)
{
int batch_count = min(count, DA_BATCH_SIZE);
*p++ = MASK(NV097_DRAW_ARRAYS_COUNT, batch_count-1) |
MASK(NV097_DRAW_ARRAYS_START_INDEX, start);
start += batch_count;
count -= batch_count;
}
p = NV2A_push1(p, NV097_SET_BEGIN_END, NV097_SET_BEGIN_END_OP_END);
pb_end(p);
}
/*########################################################################################################################*
*--------------------------------------------------Vertex shader constants------------------------------------------------*
*#########################################################################################################################*/