--- /dev/null
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2012-2015 LunarG, 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
+ * 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 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:
+ * Chia-I Wu <olv@lunarg.com>
+ */
+
+#include "ilo_debug.h"
+#include "ilo_state_viewport.h"
+
+static void
+viewport_matrix_get_gen6_guardband(const struct ilo_dev *dev,
+ const struct ilo_state_viewport_matrix_info *mat,
+ float *min_gbx, float *max_gbx,
+ float *min_gby, float *max_gby)
+{
+ /*
+ * From the Sandy Bridge PRM, volume 2 part 1, page 234:
+ *
+ * "Per-Device Guardband Extents
+ *
+ * - Supported X,Y ScreenSpace "Guardband" Extent: [-16K,16K-1]
+ * - Maximum Post-Clamp Delta (X or Y): 16K"
+ *
+ * "In addition, in order to be correctly rendered, objects must have a
+ * screenspace bounding box not exceeding 8K in the X or Y direction.
+ * This additional restriction must also be comprehended by software,
+ * i.e., enforced by use of clipping."
+ *
+ * From the Ivy Bridge PRM, volume 2 part 1, page 248:
+ *
+ * "Per-Device Guardband Extents
+ *
+ * - Supported X,Y ScreenSpace "Guardband" Extent: [-32K,32K-1]
+ * - Maximum Post-Clamp Delta (X or Y): N/A"
+ *
+ * "In addition, in order to be correctly rendered, objects must have a
+ * screenspace bounding box not exceeding 8K in the X or Y direction.
+ * This additional restriction must also be comprehended by software,
+ * i.e., enforced by use of clipping."
+ *
+ * Combined, the bounding box of any object can not exceed 8K in both
+ * width and height.
+ *
+ * Below we set the guardband as a squre of length 8K, centered at where
+ * the viewport is. This makes sure all objects passing the GB test are
+ * valid to the renderer, and those failing the XY clipping have a
+ * better chance of passing the GB test.
+ */
+ const int max_extent = (ilo_dev_gen(dev) >= ILO_GEN(7)) ? 32768 : 16384;
+ const int half_len = 8192 / 2;
+ int center_x = (int) mat->translate[0];
+ int center_y = (int) mat->translate[1];
+ float scale_x, scale_y;
+
+ ILO_DEV_ASSERT(dev, 6, 8);
+
+ /* make sure the guardband is within the valid range */
+ if (center_x - half_len < -max_extent)
+ center_x = -max_extent + half_len;
+ else if (center_x + half_len > max_extent - 1)
+ center_x = max_extent - half_len;
+
+ if (center_y - half_len < -max_extent)
+ center_y = -max_extent + half_len;
+ else if (center_y + half_len > max_extent - 1)
+ center_y = max_extent - half_len;
+
+ scale_x = fabsf(mat->scale[0]);
+ scale_y = fabsf(mat->scale[1]);
+ /*
+ * From the Haswell PRM, volume 2d, page 292-293:
+ *
+ * "Note: Minimum allowed value for this field (X/Y Min Clip Guardband)
+ * is -16384."
+ *
+ * "Note: Maximum allowed value for this field (X/Y Max Clip Guardband)
+ * is 16383."
+ *
+ * Avoid small scales.
+ */
+ if (scale_x < 1.0f)
+ scale_x = 1.0f;
+ if (scale_y < 1.0f)
+ scale_y = 1.0f;
+
+ /* in NDC space */
+ *min_gbx = ((float) (center_x - half_len) - mat->translate[0]) / scale_x;
+ *max_gbx = ((float) (center_x + half_len) - mat->translate[0]) / scale_x;
+ *min_gby = ((float) (center_y - half_len) - mat->translate[1]) / scale_y;
+ *max_gby = ((float) (center_y + half_len) - mat->translate[1]) / scale_y;
+}
+
+static void
+viewport_matrix_get_extent(const struct ilo_state_viewport_matrix_info *mat,
+ int axis, float *min, float *max)
+{
+ const float scale_abs = fabsf(mat->scale[axis]);
+
+ *min = -1.0f * scale_abs + mat->translate[axis];
+ *max = 1.0f * scale_abs + mat->translate[axis];
+}
+
+static bool
+viewport_matrix_set_gen7_SF_CLIP_VIEWPORT(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ const struct ilo_state_viewport_matrix_info *matrices,
+ uint8_t count)
+{
+ uint8_t i;
+
+ ILO_DEV_ASSERT(dev, 6, 8);
+
+ for (i = 0; i < count; i++) {
+ const struct ilo_state_viewport_matrix_info *mat = &matrices[i];
+ float min_gbx, max_gbx, min_gby, max_gby;
+ uint32_t dw[16];
+
+ viewport_matrix_get_gen6_guardband(dev, mat,
+ &min_gbx, &max_gbx, &min_gby, &max_gby);
+
+ dw[0] = fui(mat->scale[0]);
+ dw[1] = fui(mat->scale[1]);
+ dw[2] = fui(mat->scale[2]);
+ dw[3] = fui(mat->translate[0]);
+ dw[4] = fui(mat->translate[1]);
+ dw[5] = fui(mat->translate[2]);
+ dw[6] = 0;
+ dw[7] = 0;
+
+ dw[8] = fui(min_gbx);
+ dw[9] = fui(max_gbx);
+ dw[10] = fui(min_gby);
+ dw[11] = fui(max_gby);
+
+ if (ilo_dev_gen(dev) >= ILO_GEN(8)) {
+ float min_x, max_x, min_y, max_y;
+
+ viewport_matrix_get_extent(mat, 0, &min_x, &max_x);
+ viewport_matrix_get_extent(mat, 1, &min_y, &max_y);
+
+ dw[12] = fui(min_x);
+ dw[13] = fui(max_x - 1.0f);
+ dw[14] = fui(min_y);
+ dw[15] = fui(max_y - 1.0f);
+ } else {
+ dw[12] = 0;
+ dw[13] = 0;
+ dw[14] = 0;
+ dw[15] = 0;
+ }
+
+ STATIC_ASSERT(ARRAY_SIZE(vp->sf_clip[i]) >= 16);
+ memcpy(vp->sf_clip[i], dw, sizeof(dw));
+ }
+
+ return true;
+}
+
+static bool
+viewport_matrix_set_gen6_CC_VIEWPORT(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ const struct ilo_state_viewport_matrix_info *matrices,
+ uint8_t count)
+{
+ uint8_t i;
+
+ ILO_DEV_ASSERT(dev, 6, 8);
+
+ for (i = 0; i < count; i++) {
+ const struct ilo_state_viewport_matrix_info *mat = &matrices[i];
+ float min_z, max_z;
+
+ viewport_matrix_get_extent(mat, 2, &min_z, &max_z);
+
+ STATIC_ASSERT(ARRAY_SIZE(vp->cc[i]) >= 2);
+ vp->cc[i][0] = fui(min_z);
+ vp->cc[i][1] = fui(max_z);
+ }
+
+ return true;
+}
+
+static bool
+viewport_scissor_set_gen6_SCISSOR_RECT(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ const struct ilo_state_viewport_scissor_info *scissors,
+ uint8_t count)
+{
+ const uint16_t max_size = (ilo_dev_gen(dev) >= ILO_GEN(7)) ? 16384 : 8192;
+ uint8_t i;
+
+ ILO_DEV_ASSERT(dev, 6, 8);
+
+ for (i = 0; i < count; i++) {
+ const struct ilo_state_viewport_scissor_info *scissor = &scissors[i];
+ uint16_t min_x, min_y, max_x, max_y;
+ uint32_t dw0, dw1;
+
+ min_x = (scissor->min_x < max_size) ? scissor->min_x : max_size - 1;
+ min_y = (scissor->min_y < max_size) ? scissor->min_y : max_size - 1;
+ max_x = (scissor->max_x < max_size) ? scissor->max_x : max_size - 1;
+ max_y = (scissor->max_y < max_size) ? scissor->max_y : max_size - 1;
+
+ dw0 = min_y << GEN6_SCISSOR_DW0_MIN_Y__SHIFT |
+ min_x << GEN6_SCISSOR_DW0_MIN_X__SHIFT;
+ dw1 = max_y << GEN6_SCISSOR_DW1_MAX_Y__SHIFT |
+ max_x << GEN6_SCISSOR_DW1_MAX_X__SHIFT;
+
+ STATIC_ASSERT(ARRAY_SIZE(vp->scissor[i]) >= 2);
+ vp->scissor[i][0] = dw0;
+ vp->scissor[i][1] = dw1;
+ }
+
+ return true;
+}
+
+bool
+ilo_state_viewport_init(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ const struct ilo_state_viewport_info *info)
+{
+ const size_t elem_size = ilo_state_viewport_data_size(dev, 1);
+
+ assert(ilo_is_zeroed(vp, sizeof(*vp)));
+ assert(ilo_is_zeroed(info->data, info->data_size));
+
+ vp->data = info->data;
+
+ if (info->data_size / elem_size < ILO_STATE_VIEWPORT_MAX_COUNT)
+ vp->array_size = info->data_size / elem_size;
+ else
+ vp->array_size = ILO_STATE_VIEWPORT_MAX_COUNT;
+
+ return ilo_state_viewport_set_params(vp, dev, &info->params, false);
+}
+
+bool
+ilo_state_viewport_init_data_only(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ void *data, size_t data_size)
+{
+ struct ilo_state_viewport_info info;
+
+ memset(&info, 0, sizeof(info));
+ info.data = data;
+ info.data_size = data_size;
+
+ return ilo_state_viewport_init(vp, dev, &info);
+}
+
+bool
+ilo_state_viewport_init_for_rectlist(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ void *data, size_t data_size)
+{
+ struct ilo_state_viewport_info info;
+ struct ilo_state_viewport_matrix_info mat;
+ struct ilo_state_viewport_scissor_info sci;
+
+ memset(&info, 0, sizeof(info));
+ memset(&mat, 0, sizeof(mat));
+ memset(&sci, 0, sizeof(sci));
+
+ info.data = data;
+ info.data_size = data_size;
+ info.params.matrices = &mat;
+ info.params.scissors = &sci;
+ info.params.count = 1;
+
+ mat.scale[0] = 1.0f;
+ mat.scale[1] = 1.0f;
+ mat.scale[2] = 1.0f;
+
+ return ilo_state_viewport_init(vp, dev, &info);
+}
+
+static void
+viewport_set_count(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ uint8_t count)
+{
+ assert(count <= vp->array_size);
+
+ vp->count = count;
+ vp->sf_clip = (uint32_t (*)[16]) vp->data;
+ vp->cc = (uint32_t (*)[ 2]) (vp->sf_clip + count);
+ vp->scissor = (uint32_t (*)[ 2]) (vp->cc + count);
+}
+
+bool
+ilo_state_viewport_set_params(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ const struct ilo_state_viewport_params_info *params,
+ bool scissors_only)
+{
+ bool ret = true;
+
+ if (scissors_only) {
+ assert(vp->count == params->count);
+
+ ret &= viewport_scissor_set_gen6_SCISSOR_RECT(vp, dev,
+ params->scissors, params->count);
+ } else {
+ viewport_set_count(vp, dev, params->count);
+
+ ret &= viewport_matrix_set_gen7_SF_CLIP_VIEWPORT(vp, dev,
+ params->matrices, params->count);
+ ret &= viewport_matrix_set_gen6_CC_VIEWPORT(vp, dev,
+ params->matrices, params->count);
+ ret &= viewport_scissor_set_gen6_SCISSOR_RECT(vp, dev,
+ params->scissors, params->count);
+ }
+
+ assert(ret);
+
+ return ret;
+}
+
+void
+ilo_state_viewport_full_delta(const struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ struct ilo_state_viewport_delta *delta)
+{
+ delta->dirty = ILO_STATE_VIEWPORT_SF_CLIP_VIEWPORT |
+ ILO_STATE_VIEWPORT_CC_VIEWPORT |
+ ILO_STATE_VIEWPORT_SCISSOR_RECT;
+}
+
+void
+ilo_state_viewport_get_delta(const struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ const struct ilo_state_viewport *old,
+ struct ilo_state_viewport_delta *delta)
+{
+ const size_t sf_clip_size = sizeof(vp->sf_clip[0]) * vp->count;
+ const size_t cc_size = sizeof(vp->cc[0]) * vp->count;
+ const size_t scissor_size = sizeof(vp->scissor[0]) * vp->count;
+
+ /* no shallow copying */
+ assert(vp->data != old->data);
+
+ if (vp->count != old->count) {
+ ilo_state_viewport_full_delta(vp, dev, delta);
+ return;
+ }
+
+ delta->dirty = 0;
+
+ if (memcmp(vp->sf_clip, old->sf_clip, sf_clip_size))
+ delta->dirty |= ILO_STATE_VIEWPORT_SF_CLIP_VIEWPORT;
+
+ if (memcmp(vp->cc, old->cc, cc_size))
+ delta->dirty |= ILO_STATE_VIEWPORT_CC_VIEWPORT;
+
+ if (memcmp(vp->scissor, old->scissor, scissor_size))
+ delta->dirty |= ILO_STATE_VIEWPORT_SCISSOR_RECT;
+}
--- /dev/null
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2015 LunarG, 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
+ * 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 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:
+ * Chia-I Wu <olv@lunarg.com>
+ */
+
+#ifndef ILO_STATE_VIEWPORT_H
+#define ILO_STATE_VIEWPORT_H
+
+#include "genhw/genhw.h"
+
+#include "ilo_core.h"
+#include "ilo_dev.h"
+
+/*
+ * From the Sandy Bridge PRM, volume 2 part 1, page 38:
+ *
+ * "... 16 sets of viewport (VP) state parameters in the Clip unit's
+ * VertexClipTest function and in the SF unit's ViewportMapping and
+ * Scissor functions."
+ */
+#define ILO_STATE_VIEWPORT_MAX_COUNT 16
+
+enum ilo_state_viewport_dirty_bits {
+ ILO_STATE_VIEWPORT_SF_CLIP_VIEWPORT = (1 << 0),
+ ILO_STATE_VIEWPORT_CC_VIEWPORT = (1 << 1),
+ ILO_STATE_VIEWPORT_SCISSOR_RECT = (1 << 2),
+};
+
+struct ilo_state_viewport_matrix_info {
+ float scale[3];
+ float translate[3];
+};
+
+struct ilo_state_viewport_scissor_info {
+ /* all inclusive */
+ uint16_t min_x;
+ uint16_t min_y;
+ uint16_t max_x;
+ uint16_t max_y;
+};
+
+struct ilo_state_viewport_params_info {
+ const struct ilo_state_viewport_matrix_info *matrices;
+ const struct ilo_state_viewport_scissor_info *scissors;
+ uint8_t count;
+};
+
+struct ilo_state_viewport_info {
+ void *data;
+ size_t data_size;
+
+ struct ilo_state_viewport_params_info params;
+};
+
+struct ilo_state_viewport {
+ void *data;
+ uint8_t array_size;
+
+ uint8_t count;
+ uint32_t (*sf_clip)[16];
+ uint32_t (*cc)[2];
+ uint32_t (*scissor)[2];
+};
+
+struct ilo_state_viewport_delta {
+ uint32_t dirty;
+};
+
+static inline size_t
+ilo_state_viewport_data_size(const struct ilo_dev *dev, uint8_t array_size)
+{
+ const struct ilo_state_viewport *vp = NULL;
+ return (sizeof(vp->sf_clip[0]) +
+ sizeof(vp->cc[0]) +
+ sizeof(vp->scissor[0])) * array_size;
+}
+
+bool
+ilo_state_viewport_init(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ const struct ilo_state_viewport_info *info);
+
+bool
+ilo_state_viewport_init_data_only(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ void *data, size_t data_size);
+
+bool
+ilo_state_viewport_init_for_rectlist(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ void *data, size_t data_size);
+
+bool
+ilo_state_viewport_set_params(struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ const struct ilo_state_viewport_params_info *params,
+ bool scissors_only);
+
+void
+ilo_state_viewport_full_delta(const struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ struct ilo_state_viewport_delta *delta);
+
+void
+ilo_state_viewport_get_delta(const struct ilo_state_viewport *vp,
+ const struct ilo_dev *dev,
+ const struct ilo_state_viewport *old,
+ struct ilo_state_viewport_delta *delta);
+
+#endif /* ILO_STATE_VIEWPORT_H */
projects / mesa.git / commitdiff