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Diffstat (limited to 'src/gallium/drivers/svga/svga_state_framebuffer.c')
-rw-r--r--src/gallium/drivers/svga/svga_state_framebuffer.c458
1 files changed, 458 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_state_framebuffer.c b/src/gallium/drivers/svga/svga_state_framebuffer.c
new file mode 100644
index 0000000000..cfdcae4ee4
--- /dev/null
+++ b/src/gallium/drivers/svga/svga_state_framebuffer.c
@@ -0,0 +1,458 @@
+/**********************************************************
+ * Copyright 2008-2009 VMware, Inc. 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, 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.
+ *
+ **********************************************************/
+
+#include "pipe/p_inlines.h"
+#include "pipe/p_defines.h"
+#include "util/u_math.h"
+
+#include "svga_context.h"
+#include "svga_state.h"
+#include "svga_cmd.h"
+#include "svga_debug.h"
+
+#include "svga_hw_reg.h"
+
+
+/***********************************************************************
+ * Hardware state update
+ */
+
+
+static int emit_framebuffer( struct svga_context *svga,
+ unsigned dirty )
+{
+ const struct pipe_framebuffer_state *curr = &svga->curr.framebuffer;
+ struct pipe_framebuffer_state *hw = &svga->state.hw_clear.framebuffer;
+ unsigned i;
+ enum pipe_error ret;
+
+ /* XXX: Need shadow state in svga->hw to eliminate redundant
+ * uploads, especially of NULL buffers.
+ */
+
+ for(i = 0; i < PIPE_MAX_COLOR_BUFS; ++i) {
+ if (curr->cbufs[i] != hw->cbufs[i]) {
+ if (svga->curr.nr_fbs++ > 8)
+ return PIPE_ERROR_OUT_OF_MEMORY;
+
+ ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_COLOR0 + i, curr->cbufs[i]);
+ if (ret != PIPE_OK)
+ return ret;
+
+ pipe_surface_reference(&hw->cbufs[i], curr->cbufs[i]);
+ }
+ }
+
+
+ if (curr->zsbuf != hw->zsbuf) {
+ ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_DEPTH, curr->zsbuf);
+ if (ret != PIPE_OK)
+ return ret;
+
+ if (curr->zsbuf &&
+ curr->zsbuf->format == PIPE_FORMAT_Z24S8_UNORM) {
+ ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_STENCIL, curr->zsbuf);
+ if (ret != PIPE_OK)
+ return ret;
+ }
+ else {
+ ret = SVGA3D_SetRenderTarget(svga->swc, SVGA3D_RT_STENCIL, NULL);
+ if (ret != PIPE_OK)
+ return ret;
+ }
+
+ pipe_surface_reference(&hw->zsbuf, curr->zsbuf);
+ }
+
+
+ return 0;
+}
+
+
+struct svga_tracked_state svga_hw_framebuffer =
+{
+ "hw framebuffer state",
+ SVGA_NEW_FRAME_BUFFER,
+ emit_framebuffer
+};
+
+
+
+
+/***********************************************************************
+ */
+
+static int emit_viewport( struct svga_context *svga,
+ unsigned dirty )
+{
+ const struct pipe_viewport_state *viewport = &svga->curr.viewport;
+ struct svga_prescale prescale;
+ SVGA3dRect rect;
+ /* Not sure if this state is relevant with POSITIONT. Probably
+ * not, but setting to 0,1 avoids some state pingponging.
+ */
+ float range_min = 0.0;
+ float range_max = 1.0;
+ float flip = -1.0;
+ boolean degenerate = FALSE;
+ enum pipe_error ret;
+
+ float fb_width = svga->curr.framebuffer.width;
+ float fb_height = svga->curr.framebuffer.height;
+
+ memset( &prescale, 0, sizeof(prescale) );
+
+ if (svga->curr.rast->templ.bypass_vs_clip_and_viewport) {
+
+ /* Avoid POSITIONT as it has a non trivial implementation outside the D3D
+ * API. Always generate a vertex shader.
+ */
+ rect.x = 0;
+ rect.y = 0;
+ rect.w = svga->curr.framebuffer.width;
+ rect.h = svga->curr.framebuffer.height;
+
+ prescale.scale[0] = 2.0 / (float)rect.w;
+ prescale.scale[1] = - 2.0 / (float)rect.h;
+ prescale.scale[2] = 1.0;
+ prescale.scale[3] = 1.0;
+ prescale.translate[0] = -1.0f;
+ prescale.translate[1] = 1.0f;
+ prescale.translate[2] = 0;
+ prescale.translate[3] = 0;
+ prescale.enabled = TRUE;
+ } else {
+
+ /* Examine gallium viewport transformation and produce a screen
+ * rectangle and possibly vertex shader pre-transformation to
+ * get the same results.
+ */
+ float fx = viewport->scale[0] * -1.0 + viewport->translate[0];
+ float fy = flip * viewport->scale[1] * -1.0 + viewport->translate[1];
+ float fw = viewport->scale[0] * 2;
+ float fh = flip * viewport->scale[1] * 2;
+
+ SVGA_DBG(DEBUG_VIEWPORT,
+ "\ninitial %f,%f %fx%f\n",
+ fx,
+ fy,
+ fw,
+ fh);
+
+ prescale.scale[0] = 1.0;
+ prescale.scale[1] = 1.0;
+ prescale.scale[2] = 1.0;
+ prescale.scale[3] = 1.0;
+ prescale.translate[0] = 0;
+ prescale.translate[1] = 0;
+ prescale.translate[2] = 0;
+ prescale.translate[3] = 0;
+ prescale.enabled = TRUE;
+
+
+
+ if (fw < 0) {
+ prescale.scale[0] *= -1.0;
+ prescale.translate[0] += -fw;
+ fw = -fw;
+ fx = viewport->scale[0] * 1.0 + viewport->translate[0];
+ }
+
+ if (fh < 0) {
+ prescale.scale[1] *= -1.0;
+ prescale.translate[1] += -fh;
+ fh = -fh;
+ fy = flip * viewport->scale[1] * 1.0 + viewport->translate[1];
+ }
+
+ if (fx < 0) {
+ prescale.translate[0] += fx;
+ prescale.scale[0] *= fw / (fw + fx);
+ fw += fx;
+ fx = 0;
+ }
+
+ if (fy < 0) {
+ prescale.translate[1] += fy;
+ prescale.scale[1] *= fh / (fh + fy);
+ fh += fy;
+ fy = 0;
+ }
+
+ if (fx + fw > fb_width) {
+ prescale.scale[0] *= fw / (fb_width - fx);
+ prescale.translate[0] -= fx * (fw / (fb_width - fx));
+ prescale.translate[0] += fx;
+ fw = fb_width - fx;
+
+ }
+
+ if (fy + fh > fb_height) {
+ prescale.scale[1] *= fh / (fb_height - fy);
+ prescale.translate[1] -= fy * (fh / (fb_height - fy));
+ prescale.translate[1] += fy;
+ fh = fb_height - fy;
+ }
+
+ if (fw < 0 || fh < 0) {
+ fw = fh = fx = fy = 0;
+ degenerate = TRUE;
+ goto out;
+ }
+
+
+ /* D3D viewport is integer space. Convert fx,fy,etc. to
+ * integers.
+ *
+ * TODO: adjust pretranslate correct for any subpixel error
+ * introduced converting to integers.
+ */
+ rect.x = fx;
+ rect.y = fy;
+ rect.w = fw;
+ rect.h = fh;
+
+ SVGA_DBG(DEBUG_VIEWPORT,
+ "viewport error %f,%f %fx%f\n",
+ fabs((float)rect.x - fx),
+ fabs((float)rect.y - fy),
+ fabs((float)rect.w - fw),
+ fabs((float)rect.h - fh));
+
+ SVGA_DBG(DEBUG_VIEWPORT,
+ "viewport %d,%d %dx%d\n",
+ rect.x,
+ rect.y,
+ rect.w,
+ rect.h);
+
+
+ /* Finally, to get GL rasterization rules, need to tweak the
+ * screen-space coordinates slightly relative to D3D which is
+ * what hardware implements natively.
+ */
+ if (svga->curr.rast->templ.gl_rasterization_rules) {
+ float adjust_x = 0.0;
+ float adjust_y = 0.0;
+
+ switch (svga->curr.reduced_prim) {
+ case PIPE_PRIM_LINES:
+ adjust_x = -0.5;
+ adjust_y = 0;
+ break;
+ case PIPE_PRIM_POINTS:
+ case PIPE_PRIM_TRIANGLES:
+ adjust_x = -0.375;
+ adjust_y = -0.5;
+ break;
+ }
+
+ prescale.translate[0] += adjust_x;
+ prescale.translate[1] += adjust_y;
+ prescale.translate[2] = 0.5; /* D3D clip space */
+ prescale.scale[2] = 0.5; /* D3D clip space */
+ }
+
+
+ range_min = viewport->scale[2] * -1.0 + viewport->translate[2];
+ range_max = viewport->scale[2] * 1.0 + viewport->translate[2];
+
+ /* D3D (and by implication SVGA) doesn't like dealing with zmax
+ * less than zmin. Detect that case, flip the depth range and
+ * invert our z-scale factor to achieve the same effect.
+ */
+ if (range_min > range_max) {
+ float range_tmp;
+ range_tmp = range_min;
+ range_min = range_max;
+ range_max = range_tmp;
+ prescale.scale[2] = -prescale.scale[2];
+ }
+ }
+
+ if (prescale.enabled) {
+ float H[2];
+ float J[2];
+ int i;
+
+ SVGA_DBG(DEBUG_VIEWPORT,
+ "prescale %f,%f %fx%f\n",
+ prescale.translate[0],
+ prescale.translate[1],
+ prescale.scale[0],
+ prescale.scale[1]);
+
+ H[0] = (float)rect.w / 2.0;
+ H[1] = -(float)rect.h / 2.0;
+ J[0] = (float)rect.x + (float)rect.w / 2.0;
+ J[1] = (float)rect.y + (float)rect.h / 2.0;
+
+ SVGA_DBG(DEBUG_VIEWPORT,
+ "H %f,%f\n"
+ "J %fx%f\n",
+ H[0],
+ H[1],
+ J[0],
+ J[1]);
+
+ /* Adjust prescale to take into account the fact that it is
+ * going to be applied prior to the perspective divide and
+ * viewport transformation.
+ *
+ * Vwin = H(Vc/Vc.w) + J
+ *
+ * We want to tweak Vwin with scale and translation from above,
+ * as in:
+ *
+ * Vwin' = S Vwin + T
+ *
+ * But we can only modify the values at Vc. Plugging all the
+ * above together, and rearranging, eventually we get:
+ *
+ * Vwin' = H(Vc'/Vc'.w) + J
+ * where:
+ * Vc' = SVc + KVc.w
+ * K = (T + (S-1)J) / H
+ *
+ * Overwrite prescale.translate with values for K:
+ */
+ for (i = 0; i < 2; i++) {
+ prescale.translate[i] = ((prescale.translate[i] +
+ (prescale.scale[i] - 1.0) * J[i]) / H[i]);
+ }
+
+ SVGA_DBG(DEBUG_VIEWPORT,
+ "clipspace %f,%f %fx%f\n",
+ prescale.translate[0],
+ prescale.translate[1],
+ prescale.scale[0],
+ prescale.scale[1]);
+ }
+
+out:
+ if (degenerate) {
+ rect.x = 0;
+ rect.y = 0;
+ rect.w = 1;
+ rect.h = 1;
+ prescale.enabled = FALSE;
+ }
+
+ if (memcmp(&rect, &svga->state.hw_clear.viewport, sizeof(rect)) != 0) {
+ ret = SVGA3D_SetViewport(svga->swc, &rect);
+ if(ret != PIPE_OK)
+ return ret;
+
+ memcpy(&svga->state.hw_clear.viewport, &rect, sizeof(rect));
+ assert(sizeof(rect) == sizeof(svga->state.hw_clear.viewport));
+ }
+
+ if (svga->state.hw_clear.depthrange.zmin != range_min ||
+ svga->state.hw_clear.depthrange.zmax != range_max)
+ {
+ ret = SVGA3D_SetZRange(svga->swc, range_min, range_max );
+ if(ret != PIPE_OK)
+ return ret;
+
+ svga->state.hw_clear.depthrange.zmin = range_min;
+ svga->state.hw_clear.depthrange.zmax = range_max;
+ }
+
+ if (memcmp(&prescale, &svga->state.hw_clear.prescale, sizeof prescale) != 0) {
+ svga->dirty |= SVGA_NEW_PRESCALE;
+ svga->state.hw_clear.prescale = prescale;
+ }
+
+ return 0;
+}
+
+
+struct svga_tracked_state svga_hw_viewport =
+{
+ "hw viewport state",
+ ( SVGA_NEW_FRAME_BUFFER |
+ SVGA_NEW_VIEWPORT |
+ SVGA_NEW_RAST |
+ SVGA_NEW_REDUCED_PRIMITIVE ),
+ emit_viewport
+};
+
+
+/***********************************************************************
+ * Scissor state
+ */
+static int emit_scissor_rect( struct svga_context *svga,
+ unsigned dirty )
+{
+ const struct pipe_scissor_state *scissor = &svga->curr.scissor;
+ SVGA3dRect rect;
+
+ rect.x = scissor->minx;
+ rect.y = scissor->miny;
+ rect.w = scissor->maxx - scissor->minx; /* + 1 ?? */
+ rect.h = scissor->maxy - scissor->miny; /* + 1 ?? */
+
+ return SVGA3D_SetScissorRect(svga->swc, &rect);
+}
+
+
+struct svga_tracked_state svga_hw_scissor =
+{
+ "hw scissor state",
+ SVGA_NEW_SCISSOR,
+ emit_scissor_rect
+};
+
+
+/***********************************************************************
+ * Userclip state
+ */
+
+static int emit_clip_planes( struct svga_context *svga,
+ unsigned dirty )
+{
+ unsigned i;
+ enum pipe_error ret;
+
+ /* TODO: just emit directly from svga_set_clip_state()?
+ */
+ for (i = 0; i < svga->curr.clip.nr; i++) {
+ ret = SVGA3D_SetClipPlane( svga->swc,
+ i,
+ svga->curr.clip.ucp[i] );
+ if(ret != PIPE_OK)
+ return ret;
+ }
+
+ return 0;
+}
+
+
+struct svga_tracked_state svga_hw_clip_planes =
+{
+ "hw viewport state",
+ SVGA_NEW_CLIP,
+ emit_clip_planes
+};
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