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Diffstat (limited to 'src/gallium/drivers/softpipe/sp_fs_exec.c')
-rw-r--r--src/gallium/drivers/softpipe/sp_fs_exec.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_fs_exec.c b/src/gallium/drivers/softpipe/sp_fs_exec.c
new file mode 100644
index 0000000000..4fea71c314
--- /dev/null
+++ b/src/gallium/drivers/softpipe/sp_fs_exec.c
@@ -0,0 +1,169 @@
+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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 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 TUNGSTEN GRAPHICS AND/OR ITS 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 "sp_context.h"
+#include "sp_state.h"
+#include "sp_fs.h"
+#include "sp_headers.h"
+
+
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "util/u_memory.h"
+#include "pipe/p_inlines.h"
+#include "tgsi/tgsi_exec.h"
+#include "tgsi/tgsi_parse.h"
+
+struct sp_exec_fragment_shader
+{
+ struct sp_fragment_shader base;
+ const struct tgsi_token *machine_tokens;
+};
+
+
+/** cast wrapper */
+static INLINE struct sp_exec_fragment_shader *
+sp_exec_fragment_shader(const struct sp_fragment_shader *base)
+{
+ return (struct sp_exec_fragment_shader *) base;
+}
+
+
+/**
+ * Compute quad X,Y,Z,W for the four fragments in a quad.
+ *
+ * This should really be part of the compiled shader.
+ */
+void
+sp_setup_pos_vector(const struct tgsi_interp_coef *coef,
+ float x, float y,
+ struct tgsi_exec_vector *quadpos)
+{
+ uint chan;
+ /* do X */
+ quadpos->xyzw[0].f[0] = x;
+ quadpos->xyzw[0].f[1] = x + 1;
+ quadpos->xyzw[0].f[2] = x;
+ quadpos->xyzw[0].f[3] = x + 1;
+
+ /* do Y */
+ quadpos->xyzw[1].f[0] = y;
+ quadpos->xyzw[1].f[1] = y;
+ quadpos->xyzw[1].f[2] = y + 1;
+ quadpos->xyzw[1].f[3] = y + 1;
+
+ /* do Z and W for all fragments in the quad */
+ for (chan = 2; chan < 4; chan++) {
+ const float dadx = coef->dadx[chan];
+ const float dady = coef->dady[chan];
+ const float a0 = coef->a0[chan] + dadx * x + dady * y;
+ quadpos->xyzw[chan].f[0] = a0;
+ quadpos->xyzw[chan].f[1] = a0 + dadx;
+ quadpos->xyzw[chan].f[2] = a0 + dady;
+ quadpos->xyzw[chan].f[3] = a0 + dadx + dady;
+ }
+}
+
+
+static void
+exec_prepare( const struct sp_fragment_shader *base,
+ struct tgsi_exec_machine *machine,
+ struct tgsi_sampler *samplers )
+{
+ struct sp_exec_fragment_shader *spefs =
+ sp_exec_fragment_shader(base);
+
+ /*
+ * Bind tokens/shader to the interpreter's machine state.
+ * Avoid redundant binding.
+ */
+ if (spefs->machine_tokens != base->shader.tokens) {
+ tgsi_exec_machine_bind_shader( machine,
+ base->shader.tokens,
+ PIPE_MAX_SAMPLERS,
+ samplers );
+ spefs->machine_tokens = base->shader.tokens;
+ }
+}
+
+
+
+
+/* TODO: hide the machine struct in here somewhere, remove from this
+ * interface:
+ */
+static unsigned
+exec_run( const struct sp_fragment_shader *base,
+ struct tgsi_exec_machine *machine,
+ struct quad_header *quad )
+{
+
+ /* Compute X, Y, Z, W vals for this quad */
+ sp_setup_pos_vector(quad->posCoef,
+ (float)quad->input.x0, (float)quad->input.y0,
+ &machine->QuadPos);
+
+ return tgsi_exec_machine_run( machine );
+}
+
+
+
+static void
+exec_delete( struct sp_fragment_shader *base )
+{
+ FREE((void *) base->shader.tokens);
+ FREE(base);
+}
+
+
+
+
+
+struct sp_fragment_shader *
+softpipe_create_fs_exec(struct softpipe_context *softpipe,
+ const struct pipe_shader_state *templ)
+{
+ struct sp_exec_fragment_shader *shader;
+
+ /* Decide whether we'll be codegenerating this shader and if so do
+ * that now.
+ */
+
+ shader = CALLOC_STRUCT(sp_exec_fragment_shader);
+ if (!shader)
+ return NULL;
+
+ /* we need to keep a local copy of the tokens */
+ shader->base.shader.tokens = tgsi_dup_tokens(templ->tokens);
+ shader->base.prepare = exec_prepare;
+ shader->base.run = exec_run;
+ shader->base.delete = exec_delete;
+
+ return &shader->base;
+}
+