From: Kenneth Graunke Date: Thu, 11 May 2017 06:49:27 +0000 (-0700) Subject: i965: Move the scissoring code up near the viewport code. X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c6b623f60127a4ef913f927dcde0b44f9d46eb64;p=mesa.git i965: Move the scissoring code up near the viewport code. These are fairly related. Gen4-5 combine the scissor rectangle and SF_VIEWPORT. Co-locating them will allow me to avoid forward declarations of helper functions in a few patches. Reviewed-by: Topi Pohjolainen --- diff --git a/src/mesa/drivers/dri/i965/genX_state_upload.c b/src/mesa/drivers/dri/i965/genX_state_upload.c index 1041126d37f..44e3e99d33d 100644 --- a/src/mesa/drivers/dri/i965/genX_state_upload.c +++ b/src/mesa/drivers/dri/i965/genX_state_upload.c @@ -1952,6 +1952,92 @@ const struct brw_tracked_state genX(cc_vp) = { /* ---------------------------------------------------------------------- */ +#if GEN_GEN >= 6 +static void +genX(upload_scissor_state)(struct brw_context *brw) +{ + struct gl_context *ctx = &brw->ctx; + const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer); + struct GENX(SCISSOR_RECT) scissor; + uint32_t scissor_state_offset; + const unsigned int fb_width = _mesa_geometric_width(ctx->DrawBuffer); + const unsigned int fb_height = _mesa_geometric_height(ctx->DrawBuffer); + uint32_t *scissor_map; + + /* BRW_NEW_VIEWPORT_COUNT */ + const unsigned viewport_count = brw->clip.viewport_count; + + scissor_map = brw_state_batch( + brw, GENX(SCISSOR_RECT_length) * sizeof(uint32_t) * viewport_count, + 32, &scissor_state_offset); + + /* _NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT */ + + /* The scissor only needs to handle the intersection of drawable and + * scissor rect. Clipping to the boundaries of static shared buffers + * for front/back/depth is covered by looping over cliprects in brw_draw.c. + * + * Note that the hardware's coordinates are inclusive, while Mesa's min is + * inclusive but max is exclusive. + */ + for (unsigned i = 0; i < viewport_count; i++) { + int bbox[4]; + + bbox[0] = MAX2(ctx->ViewportArray[i].X, 0); + bbox[1] = MIN2(bbox[0] + ctx->ViewportArray[i].Width, fb_width); + bbox[2] = MAX2(ctx->ViewportArray[i].Y, 0); + bbox[3] = MIN2(bbox[2] + ctx->ViewportArray[i].Height, fb_height); + _mesa_intersect_scissor_bounding_box(ctx, i, bbox); + + if (bbox[0] == bbox[1] || bbox[2] == bbox[3]) { + /* If the scissor was out of bounds and got clamped to 0 width/height + * at the bounds, the subtraction of 1 from maximums could produce a + * negative number and thus not clip anything. Instead, just provide + * a min > max scissor inside the bounds, which produces the expected + * no rendering. + */ + scissor.ScissorRectangleXMin = 1; + scissor.ScissorRectangleXMax = 0; + scissor.ScissorRectangleYMin = 1; + scissor.ScissorRectangleYMax = 0; + } else if (render_to_fbo) { + /* texmemory: Y=0=bottom */ + scissor.ScissorRectangleXMin = bbox[0]; + scissor.ScissorRectangleXMax = bbox[1] - 1; + scissor.ScissorRectangleYMin = bbox[2]; + scissor.ScissorRectangleYMax = bbox[3] - 1; + } else { + /* memory: Y=0=top */ + scissor.ScissorRectangleXMin = bbox[0]; + scissor.ScissorRectangleXMax = bbox[1] - 1; + scissor.ScissorRectangleYMin = fb_height - bbox[3]; + scissor.ScissorRectangleYMax = fb_height - bbox[2] - 1; + } + + GENX(SCISSOR_RECT_pack)( + NULL, scissor_map + i * GENX(SCISSOR_RECT_length), &scissor); + } + + brw_batch_emit(brw, GENX(3DSTATE_SCISSOR_STATE_POINTERS), ptr) { + ptr.ScissorRectPointer = scissor_state_offset; + } +} + +static const struct brw_tracked_state genX(scissor_state) = { + .dirty = { + .mesa = _NEW_BUFFERS | + _NEW_SCISSOR | + _NEW_VIEWPORT, + .brw = BRW_NEW_BATCH | + BRW_NEW_BLORP | + BRW_NEW_VIEWPORT_COUNT, + }, + .emit = genX(upload_scissor_state), +}; +#endif + +/* ---------------------------------------------------------------------- */ + #if GEN_GEN >= 6 static void brw_calculate_guardband_size(uint32_t fb_width, uint32_t fb_height, @@ -2552,92 +2638,6 @@ static const struct brw_tracked_state genX(blend_state) = { /* ---------------------------------------------------------------------- */ -#if GEN_GEN >= 6 -static void -genX(upload_scissor_state)(struct brw_context *brw) -{ - struct gl_context *ctx = &brw->ctx; - const bool render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer); - struct GENX(SCISSOR_RECT) scissor; - uint32_t scissor_state_offset; - const unsigned int fb_width = _mesa_geometric_width(ctx->DrawBuffer); - const unsigned int fb_height = _mesa_geometric_height(ctx->DrawBuffer); - uint32_t *scissor_map; - - /* BRW_NEW_VIEWPORT_COUNT */ - const unsigned viewport_count = brw->clip.viewport_count; - - scissor_map = brw_state_batch( - brw, GENX(SCISSOR_RECT_length) * sizeof(uint32_t) * viewport_count, - 32, &scissor_state_offset); - - /* _NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT */ - - /* The scissor only needs to handle the intersection of drawable and - * scissor rect. Clipping to the boundaries of static shared buffers - * for front/back/depth is covered by looping over cliprects in brw_draw.c. - * - * Note that the hardware's coordinates are inclusive, while Mesa's min is - * inclusive but max is exclusive. - */ - for (unsigned i = 0; i < viewport_count; i++) { - int bbox[4]; - - bbox[0] = MAX2(ctx->ViewportArray[i].X, 0); - bbox[1] = MIN2(bbox[0] + ctx->ViewportArray[i].Width, fb_width); - bbox[2] = MAX2(ctx->ViewportArray[i].Y, 0); - bbox[3] = MIN2(bbox[2] + ctx->ViewportArray[i].Height, fb_height); - _mesa_intersect_scissor_bounding_box(ctx, i, bbox); - - if (bbox[0] == bbox[1] || bbox[2] == bbox[3]) { - /* If the scissor was out of bounds and got clamped to 0 width/height - * at the bounds, the subtraction of 1 from maximums could produce a - * negative number and thus not clip anything. Instead, just provide - * a min > max scissor inside the bounds, which produces the expected - * no rendering. - */ - scissor.ScissorRectangleXMin = 1; - scissor.ScissorRectangleXMax = 0; - scissor.ScissorRectangleYMin = 1; - scissor.ScissorRectangleYMax = 0; - } else if (render_to_fbo) { - /* texmemory: Y=0=bottom */ - scissor.ScissorRectangleXMin = bbox[0]; - scissor.ScissorRectangleXMax = bbox[1] - 1; - scissor.ScissorRectangleYMin = bbox[2]; - scissor.ScissorRectangleYMax = bbox[3] - 1; - } else { - /* memory: Y=0=top */ - scissor.ScissorRectangleXMin = bbox[0]; - scissor.ScissorRectangleXMax = bbox[1] - 1; - scissor.ScissorRectangleYMin = fb_height - bbox[3]; - scissor.ScissorRectangleYMax = fb_height - bbox[2] - 1; - } - - GENX(SCISSOR_RECT_pack)( - NULL, scissor_map + i * GENX(SCISSOR_RECT_length), &scissor); - } - - brw_batch_emit(brw, GENX(3DSTATE_SCISSOR_STATE_POINTERS), ptr) { - ptr.ScissorRectPointer = scissor_state_offset; - } -} - -static const struct brw_tracked_state genX(scissor_state) = { - .dirty = { - .mesa = _NEW_BUFFERS | - _NEW_SCISSOR | - _NEW_VIEWPORT, - .brw = BRW_NEW_BATCH | - BRW_NEW_BLORP | - BRW_NEW_VIEWPORT_COUNT, - }, - .emit = genX(upload_scissor_state), -}; -#endif - -/* ---------------------------------------------------------------------- */ - #if GEN_GEN >= 7 UNUSED static const uint32_t push_constant_opcodes[] = { [MESA_SHADER_VERTEX] = 21,