1 files changed, 137 insertions, 0 deletions
diff --git a/src/gallium/drivers/r300/r300_fs.c b/src/gallium/drivers/r300/r300_fs.c
new file mode 100644
index 0000000000..36463b9a2e
--- /dev/null
+++ b/src/gallium/drivers/r300/r300_fs.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
+ *                Joakim Sindholt <opensource@zhasha.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE. */
+
+#include "r300_fs.h"
+
+#include "r300_tgsi_to_rc.h"
+
+#include "radeon_compiler.h"
+
+static void find_output_registers(struct r300_fragment_program_compiler * compiler,
+                                  struct r300_fragment_shader * fs)
+{
+    unsigned i;
+
+    /* Mark the outputs as not present initially */
+    compiler->OutputColor = fs->info.num_outputs;
+    compiler->OutputDepth = fs->info.num_outputs;
+
+    /* Now see where they really are. */
+    for(i = 0; i < fs->info.num_outputs; ++i) {
+        switch(fs->info.output_semantic_name[i]) {
+            case TGSI_SEMANTIC_COLOR:
+                compiler->OutputColor = i;
+                break;
+            case TGSI_SEMANTIC_POSITION:
+                compiler->OutputDepth = i;
+                break;
+        }
+    }
+}
+
+static void allocate_hardware_inputs(
+    struct r300_fragment_program_compiler * c,
+    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;
+        }
+    }
+
+    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;
+        }
+    }
+}
+
+void r300_translate_fragment_shader(struct r300_context* r300,
+                                    struct r300_fragment_shader* fs)
+{
+    struct r300_fragment_program_compiler compiler;
+    struct tgsi_to_rc ttr;
+
+    memset(&compiler, 0, sizeof(compiler));
+    rc_init(&compiler.Base);
+    compiler.Base.Debug = 1;
+
+    compiler.code = &fs->code;
+    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.
+     */
+
+    find_output_registers(&compiler, fs);
+
+    if (compiler.Base.Debug) {
+        debug_printf("r300: Initial fragment program\n");
+        tgsi_dump(fs->state.tokens, 0);
+    }
+
+    /* Translate TGSI to our internal representation */
+    ttr.compiler = &compiler.Base;
+    ttr.info = &fs->info;
+
+    r300_tgsi_to_rc(&ttr, fs->state.tokens);
+
+    /* Invoke the compiler */
+    r3xx_compile_fragment_program(&compiler);
+    if (compiler.Base.Error) {
+        /* Todo: Fail gracefully */
+        fprintf(stderr, "r300 FP: Compiler error\n");
+        abort();
+    }
+
+    /* And, finally... */
+    rc_destroy(&compiler.Base);
+    fs->translated = TRUE;
+}