From 162bc831c93bf8632b25c11f116a1405b93a1704 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= Date: Sun, 21 Mar 2010 04:49:35 +0100 Subject: [PATCH] r300g: align misaligned ushort vertex indices --- src/gallium/drivers/r300/r300_render.c | 30 +++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/src/gallium/drivers/r300/r300_render.c b/src/gallium/drivers/r300/r300_render.c index afd871ae302..2fed263a7a9 100644 --- a/src/gallium/drivers/r300/r300_render.c +++ b/src/gallium/drivers/r300/r300_render.c @@ -303,7 +303,6 @@ static void r300_emit_draw_elements(struct r300_context *r300, #endif CS_LOCALS(r300); - assert((start * indexSize) % 4 == 0); assert(count < (1 << 24)); maxIndex = MIN2(maxIndex, r300->vertex_buffer_max_index); @@ -385,6 +384,32 @@ static void r300_shorten_ubyte_elts(struct r300_context* r300, *elts = new_elts; } +static void r300_align_ushort_elts(struct r300_context *r300, + struct pipe_buffer **elts, + unsigned start, unsigned count) +{ + struct pipe_screen* screen = r300->context.screen; + struct pipe_buffer* new_elts; + unsigned short *in_map; + unsigned short *out_map; + + new_elts = screen->buffer_create(screen, 32, + PIPE_BUFFER_USAGE_INDEX | + PIPE_BUFFER_USAGE_CPU_WRITE | + PIPE_BUFFER_USAGE_GPU_READ, + 2 * count); + + in_map = pipe_buffer_map(screen, *elts, PIPE_BUFFER_USAGE_CPU_READ); + out_map = pipe_buffer_map(screen, new_elts, PIPE_BUFFER_USAGE_CPU_WRITE); + + memcpy(out_map, in_map+start, 2 * count); + + pipe_buffer_unmap(screen, *elts); + pipe_buffer_unmap(screen, new_elts); + + *elts = new_elts; +} + /* This is the fast-path drawing & emission for HW TCL. */ void r300_draw_range_elements(struct pipe_context* pipe, struct pipe_buffer* indexBuffer, @@ -413,6 +438,9 @@ void r300_draw_range_elements(struct pipe_context* pipe, r300_shorten_ubyte_elts(r300, &indexBuffer, start, count); indexSize = 2; start = 0; + } else if (indexSize == 2 && start % 2 != 0) { + r300_align_ushort_elts(r300, &indexBuffer, start, count); + start = 0; } r300_update_derived_state(r300); -- 2.30.2