--- /dev/null
+/**************************************************************************
+ *
+ * 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 */
+}
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