gallium: new mipmap generation code

Based on code from Mesa's state tracker.
Still need to implement fallbacks for those texture formats which can't
generally be rendered to.

2 files changed, 558 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/util/u_gen_mipmap.c b/src/gallium/auxiliary/util/u_gen_mipmap.c
new file mode 100644
index 00000000000..f0b822929ea
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_gen_mipmap.c
@@ -0,0 +1,495 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+/**
+ * @file
+ * Mipmap generation utility
+ *  
+ * @author Brian Paul
+ */
+
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_util.h"
+#include "pipe/p_winsys.h"
+#include "pipe/p_shader_tokens.h"
+
+#include "util/u_draw_quad.h"
+#include "util/u_gen_mipmap.h"
+
+#include "tgsi/util/tgsi_build.h"
+#include "tgsi/util/tgsi_dump.h"
+#include "tgsi/util/tgsi_parse.h"
+
+
+/**
+ * Make simple fragment shader:
+ *  TEX OUT[0], IN[0], SAMP[0], 2D;
+ *  END;
+ */
+static void
+make_fragment_shader(struct gen_mipmap_state *ctx)
+{
+   struct pipe_context *pipe = ctx->pipe;
+   uint maxTokens = 100;
+   struct tgsi_token *tokens;
+   struct tgsi_header *header;
+   struct tgsi_processor *processor;
+   struct tgsi_full_declaration decl;
+   struct tgsi_full_instruction inst;
+   const uint procType = TGSI_PROCESSOR_FRAGMENT;
+   uint ti = 0;
+   struct pipe_shader_state shader;
+
+   tokens = (struct tgsi_token *) malloc(maxTokens * sizeof(tokens[0]));
+
+   /* shader header
+    */
+   *(struct tgsi_version *) &tokens[0] = tgsi_build_version();
+
+   header = (struct tgsi_header *) &tokens[1];
+   *header = tgsi_build_header();
+
+   processor = (struct tgsi_processor *) &tokens[2];
+   *processor = tgsi_build_processor( procType, header );
+
+   ti = 3;
+
+   /* declare TEX[0] input */
+   decl = tgsi_default_full_declaration();
+   decl.Declaration.File = TGSI_FILE_INPUT;
+   decl.Declaration.Semantic = 1;
+   decl.Semantic.SemanticName = TGSI_SEMANTIC_GENERIC;
+   decl.Semantic.SemanticIndex = 0;
+   /* XXX this could be linear... */
+   decl.Declaration.Interpolate = 1;
+   decl.Interpolation.Interpolate = TGSI_INTERPOLATE_PERSPECTIVE;
+   decl.u.DeclarationRange.First = 
+   decl.u.DeclarationRange.Last = 0;
+   ti += tgsi_build_full_declaration(&decl,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti);
+
+   /* declare color[0] output */
+   decl = tgsi_default_full_declaration();
+   decl.Declaration.File = TGSI_FILE_OUTPUT;
+   decl.Declaration.Semantic = 1;
+   decl.Semantic.SemanticName = TGSI_SEMANTIC_COLOR;
+   decl.Semantic.SemanticIndex = 0;
+   decl.u.DeclarationRange.First = 
+   decl.u.DeclarationRange.Last = 0;
+   ti += tgsi_build_full_declaration(&decl,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti);
+
+   /* declare sampler */
+   decl = tgsi_default_full_declaration();
+   decl.Declaration.File = TGSI_FILE_SAMPLER;
+   decl.u.DeclarationRange.First = 
+   decl.u.DeclarationRange.Last = 0;
+   ti += tgsi_build_full_declaration(&decl,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti);
+
+   /* TEX instruction */
+   inst = tgsi_default_full_instruction();
+   inst.Instruction.Opcode = TGSI_OPCODE_TEX;
+   inst.Instruction.NumDstRegs = 1;
+   inst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_OUTPUT;
+   inst.FullDstRegisters[0].DstRegister.Index = 0;
+   inst.Instruction.NumSrcRegs = 2;
+   inst.InstructionExtTexture.Texture = TGSI_TEXTURE_2D;
+   inst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT;
+   inst.FullSrcRegisters[0].SrcRegister.Index = 0;
+   inst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER;
+   inst.FullSrcRegisters[1].SrcRegister.Index = 0;
+   ti += tgsi_build_full_instruction(&inst,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti );
+
+   /* END instruction */
+   inst = tgsi_default_full_instruction();
+   inst.Instruction.Opcode = TGSI_OPCODE_END;
+   inst.Instruction.NumDstRegs = 0;
+   inst.Instruction.NumSrcRegs = 0;
+   ti += tgsi_build_full_instruction(&inst,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti );
+
+#if 0 /*debug*/
+   tgsi_dump(tokens, 0);
+#endif
+
+   shader.tokens = tokens;
+   ctx->fs = pipe->create_fs_state(pipe, &shader);
+}
+
+
+/**
+ * Make simple fragment shader:
+ *  MOV OUT[0], IN[0];
+ *  MOV OUT[1], IN[1];
+ *  END;
+ *
+ * XXX eliminate this when vertex passthrough-mode is more solid.
+ */
+static void
+make_vertex_shader(struct gen_mipmap_state *ctx)
+{
+   struct pipe_context *pipe = ctx->pipe;
+   uint maxTokens = 100;
+   struct tgsi_token *tokens;
+   struct tgsi_header *header;
+   struct tgsi_processor *processor;
+   struct tgsi_full_declaration decl;
+   struct tgsi_full_instruction inst;
+   const uint procType = TGSI_PROCESSOR_VERTEX;
+   uint ti = 0;
+   struct pipe_shader_state shader;
+
+   tokens = (struct tgsi_token *) malloc(maxTokens * sizeof(tokens[0]));
+
+   /* shader header
+    */
+   *(struct tgsi_version *) &tokens[0] = tgsi_build_version();
+
+   header = (struct tgsi_header *) &tokens[1];
+   *header = tgsi_build_header();
+
+   processor = (struct tgsi_processor *) &tokens[2];
+   *processor = tgsi_build_processor( procType, header );
+
+   ti = 3;
+
+   /* declare POS input */
+   decl = tgsi_default_full_declaration();
+   decl.Declaration.File = TGSI_FILE_INPUT;
+   /*
+   decl.Declaration.Semantic = 1;
+   decl.Semantic.SemanticName = TGSI_SEMANTIC_POSITION;
+   decl.Semantic.SemanticIndex = 0;
+   */
+   decl.u.DeclarationRange.First = 
+   decl.u.DeclarationRange.Last = 0;
+   ti += tgsi_build_full_declaration(&decl,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti);
+   /* declare TEX[0] input */
+   decl = tgsi_default_full_declaration();
+   decl.Declaration.File = TGSI_FILE_INPUT;
+   /*
+   decl.Declaration.Semantic = 1;
+   decl.Semantic.SemanticName = TGSI_SEMANTIC_GENERIC;
+   decl.Semantic.SemanticIndex = 0;
+   */
+   decl.u.DeclarationRange.First = 
+   decl.u.DeclarationRange.Last = 1;
+   ti += tgsi_build_full_declaration(&decl,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti);
+
+   /* declare POS output */
+   decl = tgsi_default_full_declaration();
+   decl.Declaration.File = TGSI_FILE_OUTPUT;
+   decl.Declaration.Semantic = 1;
+   decl.Semantic.SemanticName = TGSI_SEMANTIC_POSITION;
+   decl.Semantic.SemanticIndex = 0;
+   decl.u.DeclarationRange.First = 
+   decl.u.DeclarationRange.Last = 0;
+   ti += tgsi_build_full_declaration(&decl,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti);
+
+   /* declare TEX[0] output */
+   decl = tgsi_default_full_declaration();
+   decl.Declaration.File = TGSI_FILE_OUTPUT;
+   decl.Declaration.Semantic = 1;
+   decl.Semantic.SemanticName = TGSI_SEMANTIC_GENERIC;
+   decl.Semantic.SemanticIndex = 0;
+   decl.u.DeclarationRange.First = 
+   decl.u.DeclarationRange.Last = 1;
+   ti += tgsi_build_full_declaration(&decl,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti);
+
+   /* MOVE out[0], in[0];  # POS */
+   inst = tgsi_default_full_instruction();
+   inst.Instruction.Opcode = TGSI_OPCODE_MOV;
+   inst.Instruction.NumDstRegs = 1;
+   inst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_OUTPUT;
+   inst.FullDstRegisters[0].DstRegister.Index = 0;
+   inst.Instruction.NumSrcRegs = 1;
+   inst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT;
+   inst.FullSrcRegisters[0].SrcRegister.Index = 0;
+   ti += tgsi_build_full_instruction(&inst,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti );
+
+   /* MOVE out[1], in[1];  # TEX */
+   inst = tgsi_default_full_instruction();
+   inst.Instruction.Opcode = TGSI_OPCODE_MOV;
+   inst.Instruction.NumDstRegs = 1;
+   inst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_OUTPUT;
+   inst.FullDstRegisters[0].DstRegister.Index = 1;
+   inst.Instruction.NumSrcRegs = 1;
+   inst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT;
+   inst.FullSrcRegisters[0].SrcRegister.Index = 1;
+   ti += tgsi_build_full_instruction(&inst,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti );
+
+   /* END instruction */
+   inst = tgsi_default_full_instruction();
+   inst.Instruction.Opcode = TGSI_OPCODE_END;
+   inst.Instruction.NumDstRegs = 0;
+   inst.Instruction.NumSrcRegs = 0;
+   ti += tgsi_build_full_instruction(&inst,
+                                     &tokens[ti],
+                                     header,
+                                     maxTokens - ti );
+
+#if 0 /*debug*/
+   tgsi_dump(tokens, 0);
+#endif
+
+   shader.tokens = tokens;
+   ctx->vs = pipe->create_vs_state(pipe, &shader);
+}
+
+
+/**
+ * Create a mipmap generation context.
+ * The idea is to create one of these and re-use it each time we need to
+ * generate a mipmap.
+ */
+struct gen_mipmap_state *
+util_create_gen_mipmap(struct pipe_context *pipe)
+{
+   struct pipe_blend_state blend;
+   struct pipe_depth_stencil_alpha_state depthstencil;
+   struct pipe_rasterizer_state rasterizer;
+   struct gen_mipmap_state *ctx;
+
+   ctx = CALLOC_STRUCT(gen_mipmap_state);
+   if (!ctx)
+      return NULL;
+
+   ctx->pipe = pipe;
+
+   /* we don't use blending, but need to set valid values */
+   memset(&blend, 0, sizeof(blend));
+   blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
+   blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
+   blend.colormask = PIPE_MASK_RGBA;
+   ctx->blend = pipe->create_blend_state(pipe, &blend);
+
+   /* depth/stencil/alpha */
+   memset(&depthstencil, 0, sizeof(depthstencil));
+   ctx->depthstencil = pipe->create_depth_stencil_alpha_state(pipe, &depthstencil);
+
+   /* rasterizer */
+   memset(&rasterizer, 0, sizeof(rasterizer));
+   rasterizer.front_winding = PIPE_WINDING_CW;
+   rasterizer.cull_mode = PIPE_WINDING_NONE;
+   rasterizer.bypass_clipping = 1;  /* bypasses viewport too */
+   //rasterizer.bypass_vs = 1;
+   ctx->rasterizer = pipe->create_rasterizer_state(pipe, &rasterizer);
+
+#if 0
+   /* viewport */
+   ctx->viewport.scale[0] = 1.0;
+   ctx->viewport.scale[1] = 1.0;
+   ctx->viewport.scale[2] = 1.0;
+   ctx->viewport.scale[3] = 1.0;
+   ctx->viewport.translate[0] = 0.0;
+   ctx->viewport.translate[1] = 0.0;
+   ctx->viewport.translate[2] = 0.0;
+   ctx->viewport.translate[3] = 0.0;
+#endif
+
+   make_vertex_shader(ctx);
+   make_fragment_shader(ctx);
+
+   return ctx;
+}
+
+
+/**
+ * Destroy a mipmap generation context
+ */
+void
+util_destroy_gen_mipmap(struct gen_mipmap_state *ctx)
+{
+   struct pipe_context *pipe = ctx->pipe;
+
+   pipe->delete_blend_state(pipe, ctx->blend);
+   pipe->delete_depth_stencil_alpha_state(pipe, ctx->depthstencil);
+   pipe->delete_rasterizer_state(pipe, ctx->rasterizer);
+   pipe->delete_vs_state(pipe, ctx->vs);
+   pipe->delete_fs_state(pipe, ctx->fs);
+
+   FREE(ctx);
+}
+
+
+#if 0
+static void
+simple_viewport(struct pipe_context *pipe, uint width, uint height)
+{
+   struct pipe_viewport_state vp;
+
+   vp.scale[0] =  0.5 * width;
+   vp.scale[1] = -0.5 * height;
+   vp.scale[2] = 1.0;
+   vp.scale[3] = 1.0;
+   vp.translate[0] = 0.5 * width;
+   vp.translate[1] = 0.5 * height;
+   vp.translate[2] = 0.0;
+   vp.translate[3] = 0.0;
+
+   pipe->set_viewport_state(pipe, &vp);
+}
+#endif
+
+
+/**
+ * Generate mipmap images.  It's assumed all needed texture memory is
+ * already allocated.
+ *
+ * \param pt  the texture to generate mipmap levels for
+ * \param face  which cube face to generate mipmaps for (0 for non-cube maps)
+ * \param baseLevel  the first mipmap level to use as a src
+ * \param lastLevel  the last mipmap level to generate
+ */
+void
+util_gen_mipmap(struct gen_mipmap_state *ctx,
+                struct pipe_texture *pt,
+                uint face, uint baseLevel, uint lastLevel)
+{
+   struct pipe_context *pipe = ctx->pipe;
+   struct pipe_screen *screen = pipe->screen;
+   struct pipe_framebuffer_state fb;
+   struct pipe_sampler_state sampler;
+   void *sampler_cso;
+   uint dstLevel;
+   uint zslice = 0;
+
+   /* check if we can render in the texture's format */
+   if (!screen->is_format_supported(screen, pt->format, PIPE_SURFACE)) {
+#if 0
+      fallback_gen_mipmap(ctx, pt, face, baseLevel, lastLevel);
+#endif
+      return;
+   }
+
+   /* init framebuffer state */
+   memset(&fb, 0, sizeof(fb));
+   fb.num_cbufs = 1;
+
+   /* sampler state */
+   memset(&sampler, 0, sizeof(sampler));
+   sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+   sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+   sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+   sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
+   sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
+   sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
+   sampler.normalized_coords = 1;
+
+   /* bind our state */
+   pipe->bind_blend_state(pipe, ctx->blend);
+   pipe->bind_depth_stencil_alpha_state(pipe, ctx->depthstencil);
+   pipe->bind_rasterizer_state(pipe, ctx->rasterizer);
+   pipe->bind_vs_state(pipe, ctx->vs);
+   pipe->bind_fs_state(pipe, ctx->fs);
+#if 0
+   pipe->set_viewport_state(pipe, &ctx->viewport);
+#endif
+
+   /*
+    * XXX for small mipmap levels, it may be faster to use the software
+    * fallback path...
+    */
+   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
+      const uint srcLevel = dstLevel - 1;
+
+      /*
+       * Setup framebuffer / dest surface
+       */
+      fb.cbufs[0] = screen->get_tex_surface(screen, pt, face, dstLevel, zslice);
+      pipe->set_framebuffer_state(pipe, &fb);
+
+      /*
+       * Setup sampler state
+       * Note: we should only have to set the min/max LOD clamps to ensure
+       * we grab texels from the right mipmap level.  But some hardware
+       * has trouble with min clamping so we also set the lod_bias to
+       * try to work around that.
+       */
+      sampler.min_lod = sampler.max_lod = srcLevel;
+      sampler.lod_bias = srcLevel;
+      sampler_cso = pipe->create_sampler_state(pipe, &sampler);
+      pipe->bind_sampler_states(pipe, 1, &sampler_cso);
+
+#if 0
+      simple_viewport(pipe, pt->width[dstLevel], pt->height[dstLevel]);
+#endif
+
+      pipe->set_sampler_textures(pipe, 1, &pt);
+
+      /* quad coords in window coords (bypassing clipping, viewport mapping) */
+      util_draw_texquad(pipe,
+                        0.0F, 0.0F, /* x0, y0 */
+                        (float) pt->width[dstLevel], /* x1 */
+                        (float) pt->height[dstLevel], /* y1 */
+                        0.0F);  /* z */
+
+
+      pipe->flush(pipe, PIPE_FLUSH_WAIT);
+
+      /*pipe->texture_update(pipe, pt);  not really needed */
+
+      pipe->delete_sampler_state(pipe, sampler_cso);
+   }
+
+   /* Note: caller must restore pipe/gallium state at this time */
+}
diff --git a/src/gallium/auxiliary/util/u_gen_mipmap.h b/src/gallium/auxiliary/util/u_gen_mipmap.h
new file mode 100644
index 00000000000..6ee909f0a6f
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_gen_mipmap.h
@@ -0,0 +1,63 @@
+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
+ *
+ **************************************************************************/
+
+#ifndef U_GENMIPMAP_H
+#define U_GENMIPMAP_H
+
+#include "pipe/p_state.h"
+
+
+struct gen_mipmap_state
+{
+   struct pipe_context *pipe;
+
+   void *blend;
+   void *depthstencil;
+   void *rasterizer;
+   /*struct pipe_viewport_state viewport;*/
+   struct pipe_sampler_state *vs;
+   struct pipe_sampler_state *fs;
+};
+
+
+
+extern struct gen_mipmap_state *
+util_create_gen_mipmap(struct pipe_context *pipe);
+
+
+extern void
+util_destroy_gen_mipmap(struct gen_mipmap_state *ctx);
+
+
+
+extern void
+util_gen_mipmap(struct gen_mipmap_state *ctx,
+                struct pipe_texture *pt,
+                uint face, uint baseLevel, uint lastLevel);
+
+
+#endif