/************************************************************************** * * Copyright 2008 VMware, Inc. * All Rights Reserved. * **************************************************************************/ /** * Implementation of glDrawTex() for GL_OES_draw_tex */ #include "main/image.h" #include "main/macros.h" #include "main/teximage.h" #include "main/framebuffer.h" #include "program/program.h" #include "program/prog_print.h" #include "st_context.h" #include "st_atom.h" #include "st_cb_bitmap.h" #include "st_cb_drawtex.h" #include "st_nir.h" #include "st_util.h" #include "pipe/p_context.h" #include "pipe/p_defines.h" #include "util/u_inlines.h" #include "pipe/p_shader_tokens.h" #include "util/u_draw_quad.h" #include "util/u_simple_shaders.h" #include "util/u_upload_mgr.h" #include "cso_cache/cso_context.h" struct cached_shader { void *handle; uint num_attribs; uint semantic_names[2 + MAX_TEXTURE_UNITS]; uint semantic_indexes[2 + MAX_TEXTURE_UNITS]; }; #define MAX_SHADERS (2 * MAX_TEXTURE_UNITS) /** * Simple linear list cache. * Most of the time there'll only be one cached shader. * XXX This should be per-st_context state. */ static struct cached_shader CachedShaders[MAX_SHADERS]; static GLuint NumCachedShaders = 0; static gl_vert_attrib semantic_to_vert_attrib(unsigned semantic) { switch (semantic) { case TGSI_SEMANTIC_POSITION: return VERT_ATTRIB_POS; case TGSI_SEMANTIC_COLOR: return VERT_ATTRIB_COLOR0; case TGSI_SEMANTIC_GENERIC: case TGSI_SEMANTIC_TEXCOORD: return VERT_ATTRIB_GENERIC0; default: unreachable("unhandled semantic"); } } static gl_varying_slot semantic_to_varying_slot(unsigned semantic) { switch (semantic) { case TGSI_SEMANTIC_POSITION: return VARYING_SLOT_POS; case TGSI_SEMANTIC_COLOR: return VARYING_SLOT_COL0; case TGSI_SEMANTIC_GENERIC: case TGSI_SEMANTIC_TEXCOORD: return VARYING_SLOT_TEX0; default: unreachable("unhandled semantic"); } } static void * lookup_shader(struct st_context *st, uint num_attribs, const enum tgsi_semantic *semantic_names, const uint *semantic_indexes) { struct pipe_context *pipe = st->pipe; struct pipe_screen *screen = st->screen; GLuint i, j; /* look for existing shader with same attributes */ for (i = 0; i < NumCachedShaders; i++) { if (CachedShaders[i].num_attribs == num_attribs) { GLboolean match = GL_TRUE; for (j = 0; j < num_attribs; j++) { if (semantic_names[j] != CachedShaders[i].semantic_names[j] || semantic_indexes[j] != CachedShaders[i].semantic_indexes[j]) { match = GL_FALSE; break; } } if (match) return CachedShaders[i].handle; } } /* not found - create new one now */ if (NumCachedShaders >= MAX_SHADERS) { return NULL; } CachedShaders[i].num_attribs = num_attribs; for (j = 0; j < num_attribs; j++) { CachedShaders[i].semantic_names[j] = semantic_names[j]; CachedShaders[i].semantic_indexes[j] = semantic_indexes[j]; } enum pipe_shader_ir preferred_ir = screen->get_shader_param(screen, PIPE_SHADER_VERTEX, PIPE_SHADER_CAP_PREFERRED_IR); if (preferred_ir == PIPE_SHADER_IR_NIR) { unsigned inputs[2 + MAX_TEXTURE_UNITS]; unsigned outputs[2 + MAX_TEXTURE_UNITS]; for (int j = 0; j < num_attribs; j++) { inputs[j] = semantic_to_vert_attrib(semantic_names[j]); outputs[j] = semantic_to_varying_slot(semantic_names[j]); } CachedShaders[i].handle = st_nir_make_passthrough_shader(st, "st/drawtex VS", MESA_SHADER_VERTEX, num_attribs, inputs, outputs, NULL, 0); } else { CachedShaders[i].handle = util_make_vertex_passthrough_shader(pipe, num_attribs, semantic_names, semantic_indexes, FALSE); } NumCachedShaders++; return CachedShaders[i].handle; } static void st_DrawTex(struct gl_context *ctx, GLfloat x, GLfloat y, GLfloat z, GLfloat width, GLfloat height) { struct st_context *st = ctx->st; struct pipe_context *pipe = st->pipe; struct cso_context *cso = st->cso_context; struct pipe_resource *vbuffer = NULL; GLuint i, numTexCoords, numAttribs; GLboolean emitColor; enum tgsi_semantic semantic_names[2 + MAX_TEXTURE_UNITS]; uint semantic_indexes[2 + MAX_TEXTURE_UNITS]; struct cso_velems_state velems; unsigned offset; st_flush_bitmap_cache(st); st_invalidate_readpix_cache(st); st_validate_state(st, ST_PIPELINE_META); /* determine if we need vertex color */ if (ctx->FragmentProgram._Current->info.inputs_read & VARYING_BIT_COL0) emitColor = GL_TRUE; else emitColor = GL_FALSE; /* determine how many enabled sets of texcoords */ numTexCoords = 0; for (i = 0; i < ctx->Const.MaxTextureUnits; i++) { if (ctx->Texture.Unit[i]._Current && ctx->Texture.Unit[i]._Current->Target == GL_TEXTURE_2D) { numTexCoords++; } } /* total number of attributes per vertex */ numAttribs = 1 + emitColor + numTexCoords; /* load vertex buffer */ { #define SET_ATTRIB(VERT, ATTR, X, Y, Z, W) \ do { \ GLuint k = (((VERT) * numAttribs + (ATTR)) * 4); \ assert(k < 4 * 4 * numAttribs); \ vbuf[k + 0] = X; \ vbuf[k + 1] = Y; \ vbuf[k + 2] = Z; \ vbuf[k + 3] = W; \ } while (0) const GLfloat x0 = x, y0 = y, x1 = x + width, y1 = y + height; GLfloat *vbuf = NULL; GLuint tex_attr; u_upload_alloc(pipe->stream_uploader, 0, numAttribs * 4 * 4 * sizeof(GLfloat), 4, &offset, &vbuffer, (void **) &vbuf); if (!vbuffer) { return; } z = SATURATE(z); /* positions (in clip coords) */ { const struct gl_framebuffer *fb = ctx->DrawBuffer; const GLfloat fb_width = (GLfloat)_mesa_geometric_width(fb); const GLfloat fb_height = (GLfloat)_mesa_geometric_height(fb); const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0); const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0); const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0); const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0); SET_ATTRIB(0, 0, clip_x0, clip_y0, z, 1.0f); /* lower left */ SET_ATTRIB(1, 0, clip_x1, clip_y0, z, 1.0f); /* lower right */ SET_ATTRIB(2, 0, clip_x1, clip_y1, z, 1.0f); /* upper right */ SET_ATTRIB(3, 0, clip_x0, clip_y1, z, 1.0f); /* upper left */ semantic_names[0] = TGSI_SEMANTIC_POSITION; semantic_indexes[0] = 0; } /* colors */ if (emitColor) { const GLfloat *c = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; SET_ATTRIB(0, 1, c[0], c[1], c[2], c[3]); SET_ATTRIB(1, 1, c[0], c[1], c[2], c[3]); SET_ATTRIB(2, 1, c[0], c[1], c[2], c[3]); SET_ATTRIB(3, 1, c[0], c[1], c[2], c[3]); semantic_names[1] = TGSI_SEMANTIC_COLOR; semantic_indexes[1] = 0; tex_attr = 2; } else { tex_attr = 1; } /* texcoords */ for (i = 0; i < ctx->Const.MaxTextureUnits; i++) { if (ctx->Texture.Unit[i]._Current && ctx->Texture.Unit[i]._Current->Target == GL_TEXTURE_2D) { struct gl_texture_object *obj = ctx->Texture.Unit[i]._Current; const struct gl_texture_image *img = _mesa_base_tex_image(obj); const GLfloat wt = (GLfloat) img->Width; const GLfloat ht = (GLfloat) img->Height; const GLfloat s0 = obj->CropRect[0] / wt; const GLfloat t0 = obj->CropRect[1] / ht; const GLfloat s1 = (obj->CropRect[0] + obj->CropRect[2]) / wt; const GLfloat t1 = (obj->CropRect[1] + obj->CropRect[3]) / ht; /*printf("crop texcoords: %g, %g .. %g, %g\n", s0, t0, s1, t1);*/ SET_ATTRIB(0, tex_attr, s0, t0, 0.0f, 1.0f); /* lower left */ SET_ATTRIB(1, tex_attr, s1, t0, 0.0f, 1.0f); /* lower right */ SET_ATTRIB(2, tex_attr, s1, t1, 0.0f, 1.0f); /* upper right */ SET_ATTRIB(3, tex_attr, s0, t1, 0.0f, 1.0f); /* upper left */ semantic_names[tex_attr] = st->needs_texcoord_semantic ? TGSI_SEMANTIC_TEXCOORD : TGSI_SEMANTIC_GENERIC; /* XXX: should this use semantic index i instead of 0 ? */ semantic_indexes[tex_attr] = 0; tex_attr++; } } u_upload_unmap(pipe->stream_uploader); #undef SET_ATTRIB } cso_save_state(cso, (CSO_BIT_VIEWPORT | CSO_BIT_STREAM_OUTPUTS | CSO_BIT_VERTEX_SHADER | CSO_BIT_TESSCTRL_SHADER | CSO_BIT_TESSEVAL_SHADER | CSO_BIT_GEOMETRY_SHADER | CSO_BIT_VERTEX_ELEMENTS)); { void *vs = lookup_shader(st, numAttribs, semantic_names, semantic_indexes); cso_set_vertex_shader_handle(cso, vs); } cso_set_tessctrl_shader_handle(cso, NULL); cso_set_tesseval_shader_handle(cso, NULL); cso_set_geometry_shader_handle(cso, NULL); for (i = 0; i < numAttribs; i++) { velems.velems[i].src_offset = i * 4 * sizeof(float); velems.velems[i].instance_divisor = 0; velems.velems[i].vertex_buffer_index = 0; velems.velems[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; velems.velems[i].dual_slot = false; } velems.count = numAttribs; cso_set_vertex_elements(cso, &velems); cso_set_stream_outputs(cso, 0, NULL, NULL); /* viewport state: viewport matching window dims */ { const struct gl_framebuffer *fb = ctx->DrawBuffer; const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP); const GLfloat width = (GLfloat)_mesa_geometric_width(fb); const GLfloat height = (GLfloat)_mesa_geometric_height(fb); struct pipe_viewport_state vp; vp.scale[0] = 0.5f * width; vp.scale[1] = height * (invert ? -0.5f : 0.5f); vp.scale[2] = 1.0f; vp.translate[0] = 0.5f * width; vp.translate[1] = 0.5f * height; vp.translate[2] = 0.0f; vp.swizzle_x = PIPE_VIEWPORT_SWIZZLE_POSITIVE_X; vp.swizzle_y = PIPE_VIEWPORT_SWIZZLE_POSITIVE_Y; vp.swizzle_z = PIPE_VIEWPORT_SWIZZLE_POSITIVE_Z; vp.swizzle_w = PIPE_VIEWPORT_SWIZZLE_POSITIVE_W; cso_set_viewport(cso, &vp); } util_draw_vertex_buffer(pipe, cso, vbuffer, 0, offset, /* offset */ PIPE_PRIM_TRIANGLE_FAN, 4, /* verts */ numAttribs); /* attribs/vert */ st->last_num_vbuffers = MAX2(st->last_num_vbuffers, 1); pipe_resource_reference(&vbuffer, NULL); /* restore state */ cso_restore_state(cso, 0); st->dirty |= ST_NEW_VERTEX_ARRAYS; } void st_init_drawtex_functions(struct dd_function_table *functions) { functions->DrawTex = st_DrawTex; } /** * Free any cached shaders */ void st_destroy_drawtex(struct st_context *st) { GLuint i; for (i = 0; i < NumCachedShaders; i++) { st->pipe->delete_vs_state(st->pipe, CachedShaders[i].handle); } NumCachedShaders = 0; }