sna/gen4+: Specialise linear vertex emission

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 179 insertions, 0 deletions

diff --git a/src/sna/gen4_source.c b/src/sna/gen4_source.c
new file mode 100644
index 00000000..8ea16175
--- /dev/null
+++ b/src/sna/gen4_source.c
@@ -0,0 +1,179 @@
+/*
+ * Copyright © 2011,2012,2013 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:
+ *    Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "sna.h"
+#include "sna_render.h"
+#include "sna_render_inline.h"
+#include "gen4_source.h"
+#include "gen4_render.h"
+
+bool
+gen4_channel_init_solid(struct sna *sna,
+			struct sna_composite_channel *channel,
+			uint32_t color)
+{
+	channel->filter = PictFilterNearest;
+	channel->repeat = RepeatNormal;
+	channel->is_affine = true;
+	channel->is_solid  = true;
+	channel->transform = NULL;
+	channel->width  = 1;
+	channel->height = 1;
+	channel->pict_format = PICT_a8r8g8b8;
+	channel->card_format = GEN4_SURFACEFORMAT_B8G8R8A8_UNORM;
+
+	channel->bo = sna_render_get_solid(sna, color);
+
+	channel->scale[0]  = channel->scale[1]  = 1;
+	channel->offset[0] = channel->offset[1] = 0;
+	return channel->bo != NULL;
+}
+
+
+bool
+gen4_channel_init_linear(struct sna *sna,
+			 PicturePtr picture,
+			 struct sna_composite_channel *channel,
+			 int x, int y,
+			 int w, int h,
+			 int dst_x, int dst_y)
+{
+	PictLinearGradient *linear =
+		(PictLinearGradient *)picture->pSourcePict;
+	pixman_fixed_t tx, ty;
+	float x0, y0, sf;
+	float dx, dy;
+
+	DBG(("%s: p1=(%f, %f), p2=(%f, %f), src=(%d, %d), dst=(%d, %d), size=(%d, %d)\n",
+	     __FUNCTION__,
+	     pixman_fixed_to_double(linear->p1.x), pixman_fixed_to_double(linear->p1.y),
+	     pixman_fixed_to_double(linear->p2.x), pixman_fixed_to_double(linear->p2.y),
+	     x, y, dst_x, dst_y, w, h));
+
+	if (linear->p2.x == linear->p1.x && linear->p2.y == linear->p1.y)
+		return 0;
+
+	if (!sna_transform_is_affine(picture->transform)) {
+		DBG(("%s: fallback due to projective transform\n",
+		     __FUNCTION__));
+		return sna_render_picture_fixup(sna, picture, channel,
+						x, y, w, h, dst_x, dst_y);
+	}
+
+	channel->bo = sna_render_get_gradient(sna, (PictGradient *)linear);
+	if (!channel->bo)
+		return 0;
+
+	channel->filter = PictFilterNearest;
+	channel->repeat = picture->repeat ? picture->repeatType : RepeatNone;
+	channel->width  = channel->bo->pitch / 4;
+	channel->height = 1;
+	channel->pict_format = PICT_a8r8g8b8;
+	channel->card_format = GEN4_SURFACEFORMAT_B8G8R8A8_UNORM;
+	channel->is_linear = 1;
+	channel->is_affine = 1;
+
+	channel->scale[0]  = channel->scale[1]  = 1;
+	channel->offset[0] = channel->offset[1] = 0;
+
+	if (sna_transform_is_translation(picture->transform, &tx, &ty)) {
+		dx = pixman_fixed_to_double(linear->p2.x - linear->p1.x);
+		dy = pixman_fixed_to_double(linear->p2.y - linear->p1.y);
+
+		x0 = pixman_fixed_to_double(linear->p1.x);
+		y0 = pixman_fixed_to_double(linear->p1.y);
+
+		if (tx | ty) {
+			x0 -= pixman_fixed_to_double(tx);
+			y0 -= pixman_fixed_to_double(ty);
+		}
+	} else {
+		struct pixman_f_vector p1, p2;
+		struct pixman_f_transform m, inv;
+
+		pixman_f_transform_from_pixman_transform(&m, picture->transform);
+		DBG(("%s: transform = [%f %f %f, %f %f %f, %f %f %f]\n",
+		     __FUNCTION__,
+		     m.m[0][0], m.m[0][1], m.m[0][2],
+		     m.m[1][0], m.m[1][1], m.m[1][2],
+		     m.m[2][0], m.m[2][1], m.m[2][2]));
+		if (!pixman_f_transform_invert(&inv, &m))
+			return 0;
+
+		p1.v[0] = pixman_fixed_to_double(linear->p1.x);
+		p1.v[1] = pixman_fixed_to_double(linear->p1.y);
+		p1.v[2] = 1.;
+		pixman_f_transform_point(&inv, &p1);
+
+		p2.v[0] = pixman_fixed_to_double(linear->p2.x);
+		p2.v[1] = pixman_fixed_to_double(linear->p2.y);
+		p2.v[2] = 1.;
+		pixman_f_transform_point(&inv, &p2);
+
+		DBG(("%s: untransformed: p1=(%f, %f, %f), p2=(%f, %f, %f)\n",
+		     __FUNCTION__,
+		     p1.v[0], p1.v[1], p1.v[2],
+		     p2.v[0], p2.v[1], p2.v[2]));
+
+		dx = p2.v[0] - p1.v[0];
+		dy = p2.v[1] - p1.v[1];
+
+		x0 = p1.v[0];
+		y0 = p1.v[1];
+	}
+
+	sf = dx*dx + dy*dy;
+	dx /= sf;
+	dy /= sf;
+
+	channel->u.linear.dx = dx;
+	channel->u.linear.dy = dy;
+	channel->u.linear.offset = -dx*(x0+dst_x-x) + -dy*(y0+dst_y-y);
+
+	channel->embedded_transform.matrix[0][0] = pixman_double_to_fixed(dx);
+	channel->embedded_transform.matrix[0][1] = pixman_double_to_fixed(dy);
+	channel->embedded_transform.matrix[0][2] = pixman_double_to_fixed(channel->u.linear.offset);
+
+	channel->embedded_transform.matrix[1][0] = 0;
+	channel->embedded_transform.matrix[1][1] = 0;
+	channel->embedded_transform.matrix[1][2] = pixman_double_to_fixed(.5);
+
+	channel->embedded_transform.matrix[2][0] = 0;
+	channel->embedded_transform.matrix[2][1] = 0;
+	channel->embedded_transform.matrix[2][2] = pixman_fixed_1;
+
+	channel->transform = &channel->embedded_transform;
+
+	DBG(("%s: dx=%f, dy=%f, offset=%f\n",
+	     __FUNCTION__, dx, dy, channel->u.linear.offset));
+
+	return channel->bo != NULL;
+}