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author | Marek Olšák <maraeo@gmail.com> | 2010-04-11 10:15:12 +0200 |
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committer | Marek Olšák <maraeo@gmail.com> | 2010-04-11 19:29:31 +0200 |
commit | 6eae8e4482b6d5e3d46e10473b05f16381736a5a (patch) | |
tree | 93d97efabee49a97a9eb8d1f1ee43bac8abcce6a /src/gallium/drivers/r300/r300_vs.c | |
parent | 69019afa67d66cf3e5d2b4d5b286bf2ac1bd87af (diff) | |
download | external_mesa3d-6eae8e4482b6d5e3d46e10473b05f16381736a5a.zip external_mesa3d-6eae8e4482b6d5e3d46e10473b05f16381736a5a.tar.gz external_mesa3d-6eae8e4482b6d5e3d46e10473b05f16381736a5a.tar.bz2 |
r300g: use a dummy replacement vertex shader if the shader compilation fails
Diffstat (limited to 'src/gallium/drivers/r300/r300_vs.c')
-rw-r--r-- | src/gallium/drivers/r300/r300_vs.c | 53 |
1 files changed, 40 insertions, 13 deletions
diff --git a/src/gallium/drivers/r300/r300_vs.c b/src/gallium/drivers/r300/r300_vs.c index af5a4d7..b71972d 100644 --- a/src/gallium/drivers/r300/r300_vs.c +++ b/src/gallium/drivers/r300/r300_vs.c @@ -31,6 +31,7 @@ #include "tgsi/tgsi_dump.h" #include "tgsi/tgsi_parse.h" +#include "tgsi/tgsi_ureg.h" #include "radeon_compiler.h" @@ -250,24 +251,43 @@ static void set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c) } } -void r300_vertex_shader_common_init(struct r300_vertex_shader *vs, - const struct pipe_shader_state *shader) +static void r300_dummy_vertex_shader( + struct r300_context* r300, + struct r300_vertex_shader* shader) { - /* Copy state directly into shader. */ - vs->state = *shader; - vs->state.tokens = tgsi_dup_tokens(shader->tokens); - tgsi_scan_shader(shader->tokens, &vs->info); + struct pipe_shader_state state; + struct ureg_program *ureg; + struct ureg_dst dst; + struct ureg_src imm; - r300_shader_read_vs_outputs(&vs->info, &vs->outputs); - r300_init_vs_output_mapping(vs); + /* Make a simple vertex shader which outputs (0, 0, 0, 1), + * effectively rendering nothing. */ + ureg = ureg_create(TGSI_PROCESSOR_VERTEX); + dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0); + imm = ureg_imm4f(ureg, 0, 0, 0, 1); + + ureg_MOV(ureg, dst, imm); + ureg_END(ureg); + + state.tokens = ureg_finalize(ureg); + + shader->dummy = TRUE; + r300_translate_vertex_shader(r300, shader, state.tokens); + + ureg_destroy(ureg); } void r300_translate_vertex_shader(struct r300_context* r300, - struct r300_vertex_shader* vs) + struct r300_vertex_shader* vs, + const struct tgsi_token *tokens) { struct r300_vertex_program_compiler compiler; struct tgsi_to_rc ttr; + tgsi_scan_shader(tokens, &vs->info); + r300_shader_read_vs_outputs(&vs->info, &vs->outputs); + r300_init_vs_output_mapping(vs); + /* Setup the compiler */ rc_init(&compiler.Base); @@ -277,7 +297,7 @@ void r300_translate_vertex_shader(struct r300_context* r300, if (compiler.Base.Debug) { debug_printf("r300: Initial vertex program\n"); - tgsi_dump(vs->state.tokens, 0); + tgsi_dump(tokens, 0); } /* Translate TGSI to our internal representation */ @@ -285,7 +305,7 @@ void r300_translate_vertex_shader(struct r300_context* r300, ttr.info = &vs->info; ttr.use_half_swizzles = FALSE; - r300_tgsi_to_rc(&ttr, vs->state.tokens); + r300_tgsi_to_rc(&ttr, tokens); compiler.RequiredOutputs = ~(~0 << (vs->info.num_outputs+1)); compiler.SetHwInputOutput = &set_vertex_inputs_outputs; @@ -299,8 +319,15 @@ void r300_translate_vertex_shader(struct r300_context* r300, r3xx_compile_vertex_program(&compiler); if (compiler.Base.Error) { /* XXX We should fallback using Draw. */ - fprintf(stderr, "r300 VP: Compiler error:\n%s", compiler.Base.ErrorMsg); - abort(); + fprintf(stderr, "r300 VP: Compiler error:\n%sUsing a dummy shader" + " instead.\n", compiler.Base.ErrorMsg); + + if (vs->dummy) { + fprintf(stderr, "r300 VP: Cannot compile the dummy shader! " + "Giving up...\n"); + abort(); + } + r300_dummy_vertex_shader(r300, vs); } /* And, finally... */ |