tests/gem_render_copy: Add a simple render copy test

The goal is here to both: demonstrate a simple usage of render copy with
the possibility to write pngs to visualize what it's doing and to
provide a test bed to port the render copy function to new
architectures.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

tests/.gitignore

@@ -58,6 +58,7 @@ gem_readwrite
 gem_reg_read
 gem_reloc_overflow
 gem_reloc_vs_gpu
+gem_render_copy
 gem_render_linear_blits
 gem_render_tiled_blits
 gem_ringfill

tests/Makefile.am

@@ -88,6 +88,7 @@ TESTS_progs = \
 	gem_pin \
 	gem_pipe_control_store_loop \
 	gem_reg_read \
+	gem_render_copy \
 	gem_render_linear_blits \
 	gem_render_tiled_blits \
 	gem_ring_sync_loop \

tests/gem_render_copy.c

@@ -0,0 +1,127 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * 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, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Authors:
+ *    Damien Lespiau <damien.lespiau@intel.com>
+ */
+
+/*
+ * This file is a basic test for the render_copy() function, a very simple
+ * workload for the 3D engine.
+ */
+
+#include <stdbool.h>
+
+#include "rendercopy.h"
+
+#define WIDTH 512
+#define STRIDE (WIDTH*4)
+#define HEIGHT 512
+#define SIZE (HEIGHT*STRIDE)
+
+#define SRC_COLOR	0xffff00ff
+#define DST_COLOR	0xfff0ff00
+
+typedef struct {
+	int drm_fd;
+	uint32_t devid;
+	drm_intel_bufmgr *bufmgr;
+	uint32_t linear[WIDTH * HEIGHT];
+} data_t;
+
+static void scratch_buf_init(data_t *data, struct scratch_buf *buf,
+			     int width, int height, int stride, uint32_t color)
+{
+	drm_intel_bo *bo;
+	int i;
+
+	bo = drm_intel_bo_alloc(data->bufmgr, "", SIZE, 4096);
+	for (i = 0; i < width * height; i++)
+		data->linear[i] = color;
+	gem_write(data->drm_fd, bo->handle, 0, data->linear,
+		  sizeof(data->linear));
+
+	buf->bo = bo;
+	buf->stride = stride;
+	buf->tiling = I915_TILING_NONE;
+	buf->size = SIZE;
+}
+
+static void
+scratch_buf_check(data_t *data, struct scratch_buf *buf, int x, int y,
+		  uint32_t color)
+{
+	uint32_t val;
+
+	gem_read(data->drm_fd, buf->bo->handle, 0,
+		 data->linear, sizeof(data->linear));
+	val = data->linear[y * WIDTH + x];
+	if (val != color) {
+		fprintf(stderr, "Expected 0x%08x, found 0x%08x at (%d,%d)\n",
+			color, val, x, y);
+		abort();
+	}
+}
+
+int main(int argc, char **argv)
+{
+	data_t data = {0, };
+	struct intel_batchbuffer *batch = NULL;
+	struct scratch_buf src, dst;
+	render_copyfunc_t render_copy = NULL;
+	int opt_dump_png = false;
+
+	igt_fixture {
+		data.drm_fd = drm_open_any();
+		data.devid = intel_get_drm_devid(data.drm_fd);
+
+		data.bufmgr = drm_intel_bufmgr_gem_init(data.drm_fd, 4096);
+		igt_assert(data.bufmgr);
+
+		render_copy = get_render_copyfunc(data.devid);
+		igt_require_f(render_copy,
+			      "no render-copy function\n");
+
+		batch = intel_batchbuffer_alloc(data.bufmgr, data.devid);
+		igt_assert(batch);
+	}
+
+	scratch_buf_init(&data, &src, WIDTH, HEIGHT, STRIDE, SRC_COLOR);
+	scratch_buf_init(&data, &dst, WIDTH, HEIGHT, STRIDE, DST_COLOR);
+
+	scratch_buf_check(&data, &src, WIDTH / 2, HEIGHT / 2, SRC_COLOR);
+	scratch_buf_check(&data, &dst, WIDTH / 2, HEIGHT / 2, DST_COLOR);
+
+	scratch_buf_write_to_png(&src, "source.png");
+	scratch_buf_write_to_png(&dst, "destination.png");
+
+	render_copy(batch,
+		    &src, 0, 0, WIDTH, HEIGHT,
+		    &dst, WIDTH / 2, HEIGHT / 2);
+
+	scratch_buf_check(&data, &dst, 10, 10, DST_COLOR);
+	scratch_buf_check(&data, &dst, WIDTH - 10, HEIGHT - 10, SRC_COLOR);
+
+	scratch_buf_write_to_png(&dst, "result.png");
+
+	return 0;
+}