gallium: initial implemenation of auto mipmap generation in state tracker

Use hardware rendering to compute/render mipmap levels.
The fallback path (which will be used for non-renderable texture formats)
isn't working yet.

4 files changed, 414 insertions, 7 deletions

diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index 8db4a804ab..3350254654 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -42,6 +42,7 @@
 #include "state_tracker/st_cb_texture.h"
 #include "state_tracker/st_format.h"
 #include "state_tracker/st_texture.h"
+#include "state_tracker/st_gen_mipmap.h"
 
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
@@ -703,13 +704,9 @@ st_TexImage(GLcontext * ctx,
       texImage->Data = NULL;
    }
 
-#if 0
-   /* GL_SGIS_generate_mipmap -- this can be accelerated now.
-    */
+#if 01
    if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
-      intel_generate_mipmap(ctx, target,
-                            &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
-                            texObj);
+      ctx->Driver.GenerateMipmap(ctx, target, texObj);
    }
 #endif
 }
@@ -1538,7 +1535,7 @@ st_init_texture_functions(struct dd_function_table *functions)
    functions->CopyTexSubImage1D = st_CopyTexSubImage1D;
    functions->CopyTexSubImage2D = st_CopyTexSubImage2D;
    functions->CopyTexSubImage3D = st_CopyTexSubImage3D;
-   functions->GenerateMipmap = _mesa_generate_mipmap;
+   functions->GenerateMipmap = st_generate_mipmap;
 
    functions->GetTexImage = st_GetTexImage;
 
diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index 9c206c057a..bf4618bed8 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -49,6 +49,7 @@
 #include "st_atom.h"
 #include "st_draw.h"
 #include "st_extensions.h"
+#include "st_gen_mipmap.h"
 #include "st_program.h"
 #include "pipe/p_context.h"
 #include "pipe/p_winsys.h"
@@ -96,6 +97,7 @@ st_create_context_priv( GLcontext *ctx, struct pipe_context *pipe )
 
    st_init_atoms( st );
    st_init_draw( st );
+   st_init_generate_mipmap(st);
 
    /* we want all vertex data to be placed in buffer objects */
    vbo_use_buffer_objects(ctx);
diff --git a/src/mesa/state_tracker/st_gen_mipmap.c b/src/mesa/state_tracker/st_gen_mipmap.c
new file mode 100644
index 0000000000..16f9e4cd27
--- /dev/null
+++ b/src/mesa/state_tracker/st_gen_mipmap.c
@@ -0,0 +1,362 @@
+/**************************************************************************
+ * 
+ * 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.
+ * 
+ **************************************************************************/
+
+
+#include "main/imports.h"
+#include "main/mipmap.h"
+#include "main/teximage.h"
+
+#include "shader/prog_instruction.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/cso_cache/cso_cache.h"
+
+#include "st_context.h"
+#include "st_draw.h"
+#include "st_gen_mipmap.h"
+#include "st_program.h"
+#include "st_cb_texture.h"
+
+
+
+static void *blend_cso = NULL;
+static void *depthstencil_cso = NULL;
+static void *rasterizer_cso = NULL;
+static void *sampler_cso = NULL;
+
+static struct st_fragment_program *stfp = NULL;
+static struct st_vertex_program *stvp = NULL;
+
+
+
+static struct st_fragment_program *
+make_tex_fragment_program(GLcontext *ctx)
+{
+   struct st_fragment_program *stfp;
+   struct gl_program *p;
+   GLuint ic = 0;
+
+   p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
+   if (!p)
+      return NULL;
+
+   p->NumInstructions = 2;
+
+   p->Instructions = _mesa_alloc_instructions(p->NumInstructions);
+   if (!p->Instructions) {
+      ctx->Driver.DeleteProgram(ctx, p);
+      return NULL;
+   }
+   _mesa_init_instructions(p->Instructions, p->NumInstructions);
+
+   /* TEX result.color, fragment.texcoord[0], texture[0], 2D; */
+   p->Instructions[ic].Opcode = OPCODE_TEX;
+   p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT;
+   p->Instructions[ic].DstReg.Index = FRAG_RESULT_COLR;
+   p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT;
+   p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
+   p->Instructions[ic].TexSrcUnit = 0;
+   p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX;
+   ic++;
+
+   /* END; */
+   p->Instructions[ic++].Opcode = OPCODE_END;
+
+   assert(ic == p->NumInstructions);
+
+   p->InputsRead = FRAG_BIT_TEX0;
+   p->OutputsWritten = (1 << FRAG_RESULT_COLR);
+
+   stfp = (struct st_fragment_program *) p;
+
+   st_translate_fragment_program(ctx->st, stfp, NULL,
+                                 stfp->tokens, ST_MAX_SHADER_TOKENS);
+
+   return stfp;
+}
+
+
+
+
+/**
+ * one-time init for generate mipmap
+ * XXX Note: there may be other times we need no-op/simple state like this.
+ * In that case, some code refactoring would be good.
+ */
+void
+st_init_generate_mipmap(struct st_context *st)
+{
+   struct pipe_context *pipe = st->pipe;
+   struct pipe_blend_state blend;
+   struct pipe_rasterizer_state rasterizer;
+   struct pipe_sampler_state sampler;
+   struct pipe_depth_stencil_alpha_state depthstencil;
+
+   assert(!blend_cso);
+
+   memset(&blend, 0, sizeof(blend));
+   blend.colormask = PIPE_MASK_RGBA;
+   blend_cso = pipe->create_blend_state(pipe, &blend);
+
+   memset(&depthstencil, 0, sizeof(depthstencil));
+   depthstencil_cso = pipe->create_depth_stencil_alpha_state(pipe, &depthstencil);
+
+   memset(&rasterizer, 0, sizeof(rasterizer));
+   rasterizer_cso = pipe->create_rasterizer_state(pipe, &rasterizer);
+
+   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_NONE;
+   sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
+   sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
+   sampler.normalized_coords = 1;
+   sampler_cso = pipe->create_sampler_state(pipe, &sampler);
+
+   stfp = make_tex_fragment_program(st->ctx);
+   stvp = st_make_passthrough_vertex_shader(st, GL_FALSE);
+}
+
+
+void
+st_destroy_generate_mipmpap(struct st_context *st)
+{
+   struct pipe_context *pipe = st->pipe;
+
+   pipe->delete_blend_state(pipe, blend_cso);
+   pipe->delete_depth_stencil_alpha_state(pipe, depthstencil_cso);
+   pipe->delete_rasterizer_state(pipe, rasterizer_cso);
+   pipe->delete_sampler_state(pipe, sampler_cso);
+
+   /* XXX free stfp, stvp */
+
+   blend_cso = NULL;
+   depthstencil_cso = NULL;
+   rasterizer_cso = NULL;
+   sampler_cso = NULL;
+}
+
+
+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);
+}
+
+
+
+/*
+ * Draw simple [-1,1]x[-1,1] quad
+ */
+static void
+draw_quad(GLcontext *ctx)
+{
+   GLfloat verts[4][2][4]; /* four verts, two attribs, XYZW */
+   GLuint i;
+   GLfloat sLeft = 0.0, sRight = 1.0;
+   GLfloat tTop = 1.0, tBot = 0.0;
+   GLfloat x0 = -1.0, x1 = 1.0;
+   GLfloat y0 = -1.0, y1 = 1.0;
+
+   /* upper-left */
+   verts[0][0][0] = x0;    /* attr[0].x */
+   verts[0][0][1] = y0;    /* attr[0].y */
+   verts[0][1][0] = sLeft; /* attr[1].s */
+   verts[0][1][1] = tTop;  /* attr[1].t */
+
+   /* upper-right */
+   verts[1][0][0] = x1;
+   verts[1][0][1] = y0;
+   verts[1][1][0] = sRight;
+   verts[1][1][1] = tTop;
+
+   /* lower-right */
+   verts[2][0][0] = x1;
+   verts[2][0][1] = y1;
+   verts[2][1][0] = sRight;
+   verts[2][1][1] = tBot;
+
+   /* lower-left */
+   verts[3][0][0] = x0;
+   verts[3][0][1] = y1;
+   verts[3][1][0] = sLeft;
+   verts[3][1][1] = tBot;
+
+   /* same for all verts: */
+   for (i = 0; i < 4; i++) {
+      verts[i][0][2] = 0.0; /*Z*/
+      verts[i][0][3] = 1.0; /*W*/
+      verts[i][1][2] = 0.0; /*R*/
+      verts[i][1][3] = 1.0; /*Q*/
+   }
+
+   st_draw_vertices(ctx, PIPE_PRIM_QUADS, 4, (float *) verts, 2, GL_TRUE);
+}
+
+
+
+/**
+ * Generate mipmap levels using hardware rendering.
+ * \return TRUE if successful, FALSE if not possible
+ */
+static boolean
+st_render_mipmap(struct st_context *st,
+                 struct pipe_texture *pt,
+                 uint baseLevel, uint lastLevel)
+{
+   struct pipe_context *pipe = st->pipe;
+   struct pipe_framebuffer_state fb;
+   const uint face = 0, zslice = 0;
+   const uint first_level_save = pt->first_level;
+   uint dstLevel;
+
+   /* check if we can render in the texture's format */
+   if (!pipe->is_format_supported(pipe, pt->format, PIPE_SURFACE)) {
+      return FALSE;
+   }
+
+   /* init framebuffer state */
+   memset(&fb, 0, sizeof(fb));
+   fb.num_cbufs = 1;
+
+   /* bind CSOs */
+   pipe->bind_blend_state(pipe, blend_cso);
+   pipe->bind_depth_stencil_alpha_state(pipe, depthstencil_cso);
+   pipe->bind_rasterizer_state(pipe, rasterizer_cso);
+   pipe->bind_sampler_state(pipe, 0, sampler_cso);
+
+   /* bind shaders */
+   pipe->bind_fs_state(pipe, stfp->fs->data);
+   pipe->bind_vs_state(pipe, stvp->cso->data);
+
+   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
+      const uint srcLevel = dstLevel - 1;
+
+      /*
+       * Setup framebuffer / dest surface
+       */
+      fb.cbufs[0] = pipe->get_tex_surface(pipe, pt, face, dstLevel, zslice);
+      pipe->set_framebuffer_state(pipe, &fb);
+
+      simple_viewport(pipe, pt->width[dstLevel], pt->height[dstLevel]);
+
+      /*
+       * Setup src texture, override pt->first_level so we sample from
+       * the right mipmap level.
+       */
+      pt->first_level = srcLevel;
+      pipe->set_sampler_texture(pipe, 0, pt);
+
+      draw_quad(st->ctx);
+   }
+
+   /* restore first_level */
+   pt->first_level = first_level_save;
+
+   /* restore pipe state */
+   if (st->state.rasterizer)
+      pipe->bind_rasterizer_state(pipe, st->state.rasterizer->data);
+   if (st->state.fs)
+      pipe->bind_fs_state(pipe, st->state.fs->data);
+   if (st->state.vs)
+      pipe->bind_vs_state(pipe, st->state.vs->cso->data);
+   if (st->state.sampler[0])
+      pipe->bind_sampler_state(pipe, 0, st->state.sampler[0]->data);
+   pipe->set_sampler_texture(pipe, 0, st->state.sampler_texture[0]);
+   pipe->set_viewport_state(pipe, &st->state.viewport);
+
+   return TRUE;
+}
+
+
+
+void
+st_generate_mipmap(GLcontext *ctx, GLenum target,
+                   struct gl_texture_object *texObj)
+{
+   struct st_context *st = ctx->st;
+   struct pipe_texture *pt = st_get_texobj_texture(texObj);
+   const uint baseLevel = texObj->BaseLevel;
+   const uint lastLevel = pt->last_level;
+   uint dstLevel;
+
+   if (!st_render_mipmap(st, pt, baseLevel, lastLevel)) {
+      abort();
+      /* XXX the following won't really work at this time */
+      _mesa_generate_mipmap(ctx, target, texObj);
+      return;
+   }
+
+   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
+      const uint srcLevel = dstLevel - 1;
+      const struct gl_texture_image *srcImage
+         = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
+      struct gl_texture_image *dstImage;
+      struct st_texture_image *stImage;
+      uint dstWidth = pt->width[dstLevel];
+      uint dstHeight = pt->height[dstLevel];
+      uint dstDepth = pt->depth[dstLevel];
+      uint border = srcImage->Border;
+
+
+      dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
+      if (!dstImage) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
+         return;
+      }
+
+      if (dstImage->ImageOffsets)
+         _mesa_free(dstImage->ImageOffsets);
+
+      /* Free old image data */
+      if (dstImage->Data)
+         ctx->Driver.FreeTexImageData(ctx, dstImage);
+
+      /* initialize new image */
+      _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
+                                 dstDepth, border, srcImage->InternalFormat);
+
+      dstImage->TexFormat = srcImage->TexFormat;
+
+      stImage = (struct st_texture_image *) dstImage;
+      stImage->pt = pt;
+   }
+
+}
diff --git a/src/mesa/state_tracker/st_gen_mipmap.h b/src/mesa/state_tracker/st_gen_mipmap.h
new file mode 100644
index 0000000000..7668c1e44e
--- /dev/null
+++ b/src/mesa/state_tracker/st_gen_mipmap.h
@@ -0,0 +1,46 @@
+/**************************************************************************
+ * 
+ * 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 ST_GEN_MIPMAP_H
+#define ST_GEN_MIPMAP_H
+
+
+extern void
+st_init_generate_mipmap(struct st_context *st);
+
+
+extern void
+st_destroy_generate_mipmpap(struct st_context *st);
+
+
+extern void
+st_generate_mipmap(GLcontext *ctx, GLenum target,
+                   struct gl_texture_object *texObj);
+
+
+#endif /* ST_GEN_MIPMAP_H */