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r300g: Switch to immediate mode for tiny renders. 

Useful for e.g. blitter.
This commit is contained in:
Corbin Simpson 2010-01-12 21:50:14 -08:00
parent 50ae9c6073
commit 948b7e97a6
1 changed files with 40 additions and 4 deletions
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44
src/gallium/drivers/r300/r300_render.c
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@ -114,6 +114,39 @@ static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
return color_control;
}
static void r300_emit_draw_immediate(struct r300_context *r300,
unsigned mode,
unsigned start,
unsigned count)
{
struct pipe_buffer* vbo = r300->vertex_buffer[0].buffer;
unsigned vertex_size = r300->vertex_buffer[0].stride / sizeof(float);
unsigned i;
uint32_t* map;
CS_LOCALS(r300);
map = (uint32_t*)pipe_buffer_map_range(r300->context.screen, vbo,
start * vertex_size, count * vertex_size,
PIPE_BUFFER_USAGE_CPU_READ);
BEGIN_CS(10 + count * vertex_size);
OUT_CS_REG(R300_GA_COLOR_CONTROL,
r300_provoking_vertex_fixes(r300, mode));
OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, count * vertex_size);
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (count << 16) |
r300_translate_primitive(mode));
for (i = 0; i < count * vertex_size; i++) {
OUT_CS(*map);
map++;
}
END_CS;
pipe_buffer_unmap(r300->context.screen, vbo);
}
static void r300_emit_draw_arrays(struct r300_context *r300,
unsigned mode,
unsigned count)
@ -264,7 +297,7 @@ void r300_draw_elements(struct pipe_context* pipe,
}
void r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
unsigned start, unsigned count)
unsigned start, unsigned count)
{
struct r300_context* r300 = r300_context(pipe);
@ -287,9 +320,12 @@ void r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
r300_emit_dirty_state(r300);
r300_emit_aos(r300, start);
r300_emit_draw_arrays(r300, mode, count);
if (count < 10 && r300->vertex_buffer_count == 1) {
r300_emit_draw_immediate(r300, mode, start, count);
} else {
r300_emit_aos(r300, start);
r300_emit_draw_arrays(r300, mode, count);
}
}
/****************************************************************************