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path: root/src/gallium/drivers/r300/r300_fs.c
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Diffstat (limited to 'src/gallium/drivers/r300/r300_fs.c')
-rw-r--r--src/gallium/drivers/r300/r300_fs.c190
1 files changed, 151 insertions, 39 deletions
diff --git a/src/gallium/drivers/r300/r300_fs.c b/src/gallium/drivers/r300/r300_fs.c
index 29ddc84c41..60ea9c171d 100644
--- a/src/gallium/drivers/r300/r300_fs.c
+++ b/src/gallium/drivers/r300/r300_fs.c
@@ -1,6 +1,7 @@
/*
* Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
* Joakim Sindholt <opensource@zhasha.com>
+ * Copyright 2009 Marek Olšák <maraeo@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
@@ -21,6 +22,9 @@
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE. */
+#include "util/u_math.h"
+#include "util/u_memory.h"
+
#include "tgsi/tgsi_dump.h"
#include "r300_context.h"
@@ -31,6 +35,45 @@
#include "radeon_code.h"
#include "radeon_compiler.h"
+/* Convert info about FS input semantics to r300_shader_semantics. */
+void r300_shader_read_fs_inputs(struct tgsi_shader_info* info,
+ struct r300_shader_semantics* fs_inputs)
+{
+ int i;
+ unsigned index;
+
+ r300_shader_semantics_reset(fs_inputs);
+
+ for (i = 0; i < info->num_inputs; i++) {
+ index = info->input_semantic_index[i];
+
+ switch (info->input_semantic_name[i]) {
+ case TGSI_SEMANTIC_COLOR:
+ assert(index <= ATTR_COLOR_COUNT);
+ fs_inputs->color[index] = i;
+ break;
+
+ case TGSI_SEMANTIC_GENERIC:
+ assert(index <= ATTR_GENERIC_COUNT);
+ fs_inputs->generic[index] = i;
+ break;
+
+ case TGSI_SEMANTIC_FOG:
+ assert(index == 0);
+ fs_inputs->fog = i;
+ break;
+
+ case TGSI_SEMANTIC_POSITION:
+ assert(index == 0);
+ fs_inputs->wpos = i;
+ break;
+
+ default:
+ assert(0);
+ }
+ }
+}
+
static void find_output_registers(struct r300_fragment_program_compiler * compiler,
struct r300_fragment_shader * fs)
{
@@ -58,61 +101,69 @@ static void allocate_hardware_inputs(
void (*allocate)(void * data, unsigned input, unsigned hwreg),
void * mydata)
{
- struct tgsi_shader_info* info = &((struct r300_fragment_shader*)c->UserData)->info;
- int total_colors = 0;
- int colors = 0;
- int total_generic = 0;
- int generic = 0;
- int i;
-
- for (i = 0; i < info->num_inputs; i++) {
- switch (info->input_semantic_name[i]) {
- case TGSI_SEMANTIC_COLOR:
- total_colors++;
- break;
- case TGSI_SEMANTIC_FOG:
- case TGSI_SEMANTIC_GENERIC:
- total_generic++;
- break;
+ struct r300_shader_semantics* inputs =
+ (struct r300_shader_semantics*)c->UserData;
+ int i, reg = 0;
+
+ /* Allocate input registers. */
+ for (i = 0; i < ATTR_COLOR_COUNT; i++) {
+ if (inputs->color[i] != ATTR_UNUSED) {
+ allocate(mydata, inputs->color[i], reg++);
+ }
+ }
+ for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
+ if (inputs->generic[i] != ATTR_UNUSED) {
+ allocate(mydata, inputs->generic[i], reg++);
}
}
+ if (inputs->fog != ATTR_UNUSED) {
+ allocate(mydata, inputs->fog, reg++);
+ }
+ if (inputs->wpos != ATTR_UNUSED) {
+ allocate(mydata, inputs->wpos, reg++);
+ }
+}
- for(i = 0; i < info->num_inputs; i++) {
- switch (info->input_semantic_name[i]) {
- case TGSI_SEMANTIC_COLOR:
- allocate(mydata, i, colors);
- colors++;
- break;
- case TGSI_SEMANTIC_FOG:
- case TGSI_SEMANTIC_GENERIC:
- allocate(mydata, i, total_colors + generic);
- generic++;
- break;
+static void get_compare_state(
+ struct r300_context* r300,
+ struct r300_fragment_program_external_state* state,
+ unsigned shadow_samplers)
+{
+ memset(state, 0, sizeof(*state));
+
+ for (int i = 0; i < r300->sampler_count; i++) {
+ struct r300_sampler_state* s = r300->sampler_states[i];
+
+ if (s && s->state.compare_mode == PIPE_TEX_COMPARE_R_TO_TEXTURE) {
+ /* XXX Gallium doesn't provide us with any information regarding
+ * this mode, so we are screwed. I'm setting 0 = LUMINANCE. */
+ state->unit[i].depth_texture_mode = 0;
+
+ /* Fortunately, no need to translate this. */
+ state->unit[i].texture_compare_func = s->state.compare_func;
}
}
}
-void r300_translate_fragment_shader(struct r300_context* r300,
- struct r300_fragment_shader* fs)
+static void r300_translate_fragment_shader(
+ struct r300_context* r300,
+ struct r300_fragment_shader_code* shader)
{
+ struct r300_fragment_shader* fs = r300->fs;
struct r300_fragment_program_compiler compiler;
struct tgsi_to_rc ttr;
+ int wpos = fs->inputs.wpos;
+ /* Setup the compiler. */
memset(&compiler, 0, sizeof(compiler));
rc_init(&compiler.Base);
compiler.Base.Debug = DBG_ON(r300, DBG_FP);
- compiler.code = &fs->code;
+ compiler.code = &shader->code;
+ compiler.state = shader->compare_state;
compiler.is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
compiler.AllocateHwInputs = &allocate_hardware_inputs;
- compiler.UserData = fs;
-
- /* TODO: Program compilation depends on texture compare modes,
- * which are sampler state. Therefore, programs need to be recompiled
- * depending on this state as in the classic Mesa driver.
- *
- * This is not yet handled correctly.
- */
+ compiler.UserData = &fs->inputs;
find_output_registers(&compiler, fs);
@@ -127,15 +178,76 @@ void r300_translate_fragment_shader(struct r300_context* r300,
r300_tgsi_to_rc(&ttr, fs->state.tokens);
+ fs->shadow_samplers = compiler.Base.Program.ShadowSamplers;
+
+ /**
+ * Transform the program to support WPOS.
+ *
+ * Introduce a small fragment at the start of the program that will be
+ * the only code that directly reads the WPOS input.
+ * All other code pieces that reference that input will be rewritten
+ * to read from a newly allocated temporary. */
+ if (wpos != ATTR_UNUSED) {
+ /* Moving the input to some other reg is not really necessary. */
+ rc_transform_fragment_wpos(&compiler.Base, wpos, wpos, TRUE);
+ }
+
/* Invoke the compiler */
r3xx_compile_fragment_program(&compiler);
if (compiler.Base.Error) {
/* XXX failover maybe? */
DBG(r300, DBG_FP, "r300: Error compiling fragment program: %s\n",
compiler.Base.ErrorMsg);
+ assert(0);
}
/* And, finally... */
rc_destroy(&compiler.Base);
- fs->translated = TRUE;
+}
+
+boolean r300_pick_fragment_shader(struct r300_context* r300)
+{
+ struct r300_fragment_shader* fs = r300->fs;
+ struct r300_fragment_program_external_state state;
+ struct r300_fragment_shader_code* ptr;
+
+ if (!fs->first) {
+ /* Build the fragment shader for the first time. */
+ fs->first = fs->shader = CALLOC_STRUCT(r300_fragment_shader_code);
+
+ /* BTW shadow samplers will be known after the first translation,
+ * therefore we set ~0, which means it should look at all sampler
+ * states. This choice doesn't have any impact on the correctness. */
+ get_compare_state(r300, &fs->shader->compare_state, ~0);
+ r300_translate_fragment_shader(r300, fs->shader);
+ return TRUE;
+
+ } else if (fs->shadow_samplers) {
+ get_compare_state(r300, &state, fs->shadow_samplers);
+
+ /* Check if the currently-bound shader has been compiled
+ * with the texture-compare state we need. */
+ if (memcmp(&fs->shader->compare_state, &state, sizeof(state)) != 0) {
+ /* Search for the right shader. */
+ ptr = fs->first;
+ while (ptr) {
+ if (memcmp(&ptr->compare_state, &state, sizeof(state)) == 0) {
+ fs->shader = ptr;
+ return TRUE;
+ }
+ ptr = ptr->next;
+ }
+
+ /* Not found, gotta compile a new one. */
+ ptr = CALLOC_STRUCT(r300_fragment_shader_code);
+ ptr->next = fs->first;
+ fs->first = fs->shader = ptr;
+
+ ptr->compare_state = state;
+ r300_translate_fragment_shader(r300, ptr);
+ return TRUE;
+ }
+ }
+
+ return FALSE;
}
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