gallium/noop: no operation gallium driver

This driver is a fake swdri driver that perform no operations
beside allocation gallium structure and buffer for upper layer
usage.

It's purpose is to help profiling core mesa/gallium without
having pipe driver overhead hidding hot spot of core code.

scons file are likely inadequate i am unfamiliar with this
build system.

To use it simply rename is to swrast_dri.so and properly set
LIBGL_DRIVERS_PATH env variable.

Signed-off-by: Jerome Glisse <[email protected]>

1 files changed, 256 insertions, 0 deletions

diff --git a/src/gallium/drivers/noop/noop_state.c b/src/gallium/drivers/noop/noop_state.c
new file mode 100644
index 00000000000..048ed42a9b6
--- /dev/null
+++ b/src/gallium/drivers/noop/noop_state.c
@@ -0,0 +1,256 @@
+/*
+ * Copyright 2010 Red Hat Inc.
+ *
+ * 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 <stdio.h>
+#include <errno.h>
+#include <pipe/p_defines.h>
+#include <pipe/p_state.h>
+#include <pipe/p_context.h>
+#include <pipe/p_screen.h>
+#include <util/u_memory.h>
+#include <util/u_inlines.h>
+
+static void noop_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *info)
+{
+}
+
+static void noop_set_blend_color(struct pipe_context *ctx,
+					const struct pipe_blend_color *state)
+{
+}
+
+static void *noop_create_blend_state(struct pipe_context *ctx,
+					const struct pipe_blend_state *state)
+{
+	struct pipe_blend_state *nstate = CALLOC_STRUCT(pipe_blend_state);
+
+	if (nstate == NULL) {
+		return NULL;
+	}
+	*nstate = *state;
+	return nstate;
+}
+
+static void *noop_create_dsa_state(struct pipe_context *ctx,
+				   const struct pipe_depth_stencil_alpha_state *state)
+{
+	struct pipe_depth_stencil_alpha_state *nstate = CALLOC_STRUCT(pipe_depth_stencil_alpha_state);
+
+	if (nstate == NULL) {
+		return NULL;
+	}
+	*nstate = *state;
+	return nstate;
+}
+
+static void *noop_create_rs_state(struct pipe_context *ctx,
+					const struct pipe_rasterizer_state *state)
+{
+	struct pipe_rasterizer_state *nstate = CALLOC_STRUCT(pipe_rasterizer_state);
+
+	if (nstate == NULL) {
+		return NULL;
+	}
+	*nstate = *state;
+	return nstate;
+}
+
+static void *noop_create_sampler_state(struct pipe_context *ctx,
+					const struct pipe_sampler_state *state)
+{
+	struct pipe_sampler_state *nstate = CALLOC_STRUCT(pipe_sampler_state);
+
+	if (nstate == NULL) {
+		return NULL;
+	}
+	*nstate = *state;
+	return nstate;
+}
+
+static struct pipe_sampler_view *noop_create_sampler_view(struct pipe_context *ctx,
+							struct pipe_resource *texture,
+							const struct pipe_sampler_view *state)
+{
+	struct pipe_sampler_view *sampler_view = CALLOC_STRUCT(pipe_sampler_view);
+
+	if (sampler_view == NULL)
+		return NULL;
+	/* initialize base object */
+	pipe_resource_reference(&sampler_view->texture, texture);
+	pipe_reference_init(&sampler_view->reference, 1);
+	sampler_view->context = ctx;
+	return sampler_view;
+}
+
+static void noop_set_vs_sampler_view(struct pipe_context *ctx, unsigned count,
+					struct pipe_sampler_view **views)
+{
+}
+
+static void noop_set_ps_sampler_view(struct pipe_context *ctx, unsigned count,
+					struct pipe_sampler_view **views)
+{
+}
+
+static void noop_bind_sampler(struct pipe_context *ctx, unsigned count, void **states)
+{
+}
+
+static void noop_set_clip_state(struct pipe_context *ctx,
+				const struct pipe_clip_state *state)
+{
+}
+
+static void noop_set_polygon_stipple(struct pipe_context *ctx,
+					 const struct pipe_poly_stipple *state)
+{
+}
+
+static void noop_set_sample_mask(struct pipe_context *pipe, unsigned sample_mask)
+{
+}
+
+static void noop_set_scissor_state(struct pipe_context *ctx,
+					const struct pipe_scissor_state *state)
+{
+}
+
+static void noop_set_stencil_ref(struct pipe_context *ctx,
+				const struct pipe_stencil_ref *state)
+{
+}
+
+static void noop_set_viewport_state(struct pipe_context *ctx,
+					const struct pipe_viewport_state *state)
+{
+}
+
+static void noop_set_framebuffer_state(struct pipe_context *ctx,
+					const struct pipe_framebuffer_state *state)
+{
+}
+
+static void noop_set_constant_buffer(struct pipe_context *ctx,
+					uint shader, uint index,
+					struct pipe_resource *buffer)
+{
+}
+
+
+static void noop_sampler_view_destroy(struct pipe_context *ctx,
+				struct pipe_sampler_view *state)
+{
+	pipe_resource_reference(&state->texture, NULL);
+	FREE(state);
+}
+
+static void noop_bind_state(struct pipe_context *ctx, void *state)
+{
+}
+
+static void noop_delete_state(struct pipe_context *ctx, void *state)
+{
+	FREE(state);
+}
+
+static void noop_delete_vertex_element(struct pipe_context *ctx, void *state)
+{
+	FREE(state);
+}
+
+
+static void noop_set_index_buffer(struct pipe_context *ctx,
+					const struct pipe_index_buffer *ib)
+{
+}
+
+static void noop_set_vertex_buffers(struct pipe_context *ctx, unsigned count,
+					const struct pipe_vertex_buffer *buffers)
+{
+}
+
+static void *noop_create_vertex_elements(struct pipe_context *ctx,
+					unsigned count,
+					const struct pipe_vertex_element *state)
+{
+	struct pipe_vertex_element *nstate = CALLOC_STRUCT(pipe_vertex_element);
+
+	if (nstate == NULL) {
+		return NULL;
+	}
+	*nstate = *state;
+	return nstate;
+}
+
+static void *noop_create_shader_state(struct pipe_context *ctx,
+					const struct pipe_shader_state *state)
+{
+	struct pipe_shader_state *nstate = CALLOC_STRUCT(pipe_shader_state);
+
+	if (nstate == NULL) {
+		return NULL;
+	}
+	*nstate = *state;
+	return nstate;
+}
+
+void noop_init_state_functions(struct pipe_context *ctx)
+{
+	ctx->create_blend_state = noop_create_blend_state;
+	ctx->create_depth_stencil_alpha_state = noop_create_dsa_state;
+	ctx->create_fs_state = noop_create_shader_state;
+	ctx->create_rasterizer_state = noop_create_rs_state;
+	ctx->create_sampler_state = noop_create_sampler_state;
+	ctx->create_sampler_view = noop_create_sampler_view;
+	ctx->create_vertex_elements_state = noop_create_vertex_elements;
+	ctx->create_vs_state = noop_create_shader_state;
+	ctx->bind_blend_state = noop_bind_state;
+	ctx->bind_depth_stencil_alpha_state = noop_bind_state;
+	ctx->bind_fragment_sampler_states = noop_bind_sampler;
+	ctx->bind_fs_state = noop_bind_state;
+	ctx->bind_rasterizer_state = noop_bind_state;
+	ctx->bind_vertex_elements_state = noop_bind_state;
+	ctx->bind_vertex_sampler_states = noop_bind_sampler;
+	ctx->bind_vs_state = noop_bind_state;
+	ctx->delete_blend_state = noop_delete_state;
+	ctx->delete_depth_stencil_alpha_state = noop_delete_state;
+	ctx->delete_fs_state = noop_delete_state;
+	ctx->delete_rasterizer_state = noop_delete_state;
+	ctx->delete_sampler_state = noop_delete_state;
+	ctx->delete_vertex_elements_state = noop_delete_vertex_element;
+	ctx->delete_vs_state = noop_delete_state;
+	ctx->set_blend_color = noop_set_blend_color;
+	ctx->set_clip_state = noop_set_clip_state;
+	ctx->set_constant_buffer = noop_set_constant_buffer;
+	ctx->set_fragment_sampler_views = noop_set_ps_sampler_view;
+	ctx->set_framebuffer_state = noop_set_framebuffer_state;
+	ctx->set_polygon_stipple = noop_set_polygon_stipple;
+	ctx->set_sample_mask = noop_set_sample_mask;
+	ctx->set_scissor_state = noop_set_scissor_state;
+	ctx->set_stencil_ref = noop_set_stencil_ref;
+	ctx->set_vertex_buffers = noop_set_vertex_buffers;
+	ctx->set_index_buffer = noop_set_index_buffer;
+	ctx->set_vertex_sampler_views = noop_set_vs_sampler_view;
+	ctx->set_viewport_state = noop_set_viewport_state;
+	ctx->sampler_view_destroy = noop_sampler_view_destroy;
+	ctx->draw_vbo = noop_draw_vbo;
+}