1 /* 2 * Copyright 2011 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 */ 23 24 #include "brw_context.h" 25 #include "brw_state.h" 26 #include "brw_defines.h" 27 #include "intel_batchbuffer.h" 28 #include "main/fbobject.h" 29 #include "main/framebuffer.h" 30 #include "main/viewport.h" 31 32 static void 33 gen8_upload_sf_clip_viewport(struct brw_context *brw) 34 { 35 struct gl_context *ctx = &brw->ctx; 36 const struct gen_device_info *devinfo = &brw->screen->devinfo; 37 float y_scale, y_bias; 38 39 /* BRW_NEW_VIEWPORT_COUNT */ 40 const unsigned viewport_count = brw->clip.viewport_count; 41 42 /* _NEW_BUFFERS */ 43 struct gl_framebuffer *fb = ctx->DrawBuffer; 44 const bool render_to_fbo = _mesa_is_user_fbo(fb); 45 const uint32_t fb_width = _mesa_geometric_width(ctx->DrawBuffer); 46 const uint32_t fb_height = _mesa_geometric_height(ctx->DrawBuffer); 47 48 float *vp = brw_state_batch(brw, AUB_TRACE_SF_VP_STATE, 49 16 * 4 * viewport_count, 50 64, &brw->sf.vp_offset); 51 /* Also assign to clip.vp_offset in case something uses it. */ 52 brw->clip.vp_offset = brw->sf.vp_offset; 53 54 /* _NEW_BUFFERS */ 55 if (render_to_fbo) { 56 y_scale = 1.0; 57 y_bias = 0; 58 } else { 59 y_scale = -1.0; 60 y_bias = (float)fb_height; 61 } 62 63 for (unsigned i = 0; i < viewport_count; i++) { 64 float scale[3], translate[3]; 65 _mesa_get_viewport_xform(ctx, i, scale, translate); 66 67 /* _NEW_VIEWPORT: Viewport Matrix Elements */ 68 vp[0] = scale[0]; /* m00 */ 69 vp[1] = scale[1] * y_scale; /* m11 */ 70 vp[2] = scale[2]; /* m22 */ 71 vp[3] = translate[0]; /* m30 */ 72 vp[4] = translate[1] * y_scale + y_bias; /* m31 */ 73 vp[5] = translate[2]; /* m32 */ 74 75 /* Reserved */ 76 vp[6] = 0; 77 vp[7] = 0; 78 79 brw_calculate_guardband_size(devinfo, fb_width, fb_height, 80 vp[0], vp[1], vp[3], vp[4], 81 &vp[8], &vp[9], &vp[10], &vp[11]); 82 83 /* _NEW_VIEWPORT | _NEW_BUFFERS: Screen Space Viewport 84 * The hardware will take the intersection of the drawing rectangle, 85 * scissor rectangle, and the viewport extents. We don't need to be 86 * smart, and can therefore just program the viewport extents. 87 */ 88 float viewport_Xmax = ctx->ViewportArray[i].X + ctx->ViewportArray[i].Width; 89 float viewport_Ymax = ctx->ViewportArray[i].Y + ctx->ViewportArray[i].Height; 90 if (render_to_fbo) { 91 vp[12] = ctx->ViewportArray[i].X; 92 vp[13] = viewport_Xmax - 1; 93 vp[14] = ctx->ViewportArray[i].Y; 94 vp[15] = viewport_Ymax - 1; 95 } else { 96 vp[12] = ctx->ViewportArray[i].X; 97 vp[13] = viewport_Xmax - 1; 98 vp[14] = fb_height - viewport_Ymax; 99 vp[15] = fb_height - ctx->ViewportArray[i].Y - 1; 100 } 101 102 vp += 16; 103 } 104 105 BEGIN_BATCH(2); 106 OUT_BATCH(_3DSTATE_VIEWPORT_STATE_POINTERS_SF_CL << 16 | (2 - 2)); 107 OUT_BATCH(brw->sf.vp_offset); 108 ADVANCE_BATCH(); 109 } 110 111 const struct brw_tracked_state gen8_sf_clip_viewport = { 112 .dirty = { 113 .mesa = _NEW_BUFFERS | 114 _NEW_VIEWPORT, 115 .brw = BRW_NEW_BATCH | 116 BRW_NEW_BLORP | 117 BRW_NEW_VIEWPORT_COUNT, 118 }, 119 .emit = gen8_upload_sf_clip_viewport, 120 }; 121