icd/intel/shader.c

/*
 * XGL
 *
 * Copyright (C) 2014 LunarG, Inc.
 *
 * 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, sublicense,
 * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 * Authors:
 *   Courtney Goeltzenleuchter <courtney@lunarg.com>
 *   Chia-I Wu <olv@lunarg.com>
 */

#include "dev.h"
#include "shader.h"
#include "compiler/shader/compiler_interface.h"

static XGL_RESULT shader_parse_glsl(struct intel_shader *sh,
                                   const struct intel_gpu *gpu,
                                   const XGL_INTEL_COMPILE_GLSL *glsl_header,
                                   XGL_SIZE size)
{
    struct intel_ir *ir;

    ir = icd_alloc(sizeof(*ir), 0, XGL_SYSTEM_ALLOC_INTERNAL_SHADER);
    if (!ir)
        return XGL_ERROR_OUT_OF_MEMORY;

    // invoke our program creation as well
    ir->shader_program = shader_create_program(sh, glsl_header);
    if (!ir->shader_program)
        return XGL_ERROR_BAD_SHADER_CODE;

    // TODO: set necessary shader information. This should really
    // happen as result of create_program call.
    sh->ir = ir;
    switch (glsl_header->stage) {
    case XGL_SHADER_STAGE_VERTEX:
        sh->uses |= INTEL_SHADER_USE_VID;
        sh->in_count = 1;
        sh->out_count = 2;
        sh->urb_grf_start = 1;
        break;
    case XGL_SHADER_STAGE_FRAGMENT:
        sh->out_count = 1;
        sh->surface_count = 1;
        sh->urb_grf_start = 2;
        break;
    default:
        break;
    }

    return XGL_SUCCESS;
}

static XGL_RESULT shader_parse_bil(struct intel_shader *sh,
                                   const struct intel_gpu *gpu,
                                   const struct icd_bil_header *bil,
                                   XGL_SIZE size)
{
    struct intel_ir *ir;

    ir = icd_alloc(sizeof(*ir), 0, XGL_SYSTEM_ALLOC_INTERNAL_SHADER);
    if (!ir)
        return XGL_ERROR_OUT_OF_MEMORY;

    ir->size = size - sizeof(*bil);

    ir->kernel = icd_alloc(ir->size, 0, XGL_SYSTEM_ALLOC_INTERNAL_SHADER);
    if (!ir->kernel) {
        icd_free(ir);
        return XGL_ERROR_OUT_OF_MEMORY;
    }

    // TODO: Translate BIL header to internal-IR

    sh->ir = ir;

    return XGL_SUCCESS;
}

static void shader_destroy(struct intel_obj *obj)
{
    struct intel_shader *sh = intel_shader_from_obj(obj);

    shader_destroy_program(sh->ir->shader_program);
    icd_free(sh->ir);
    intel_base_destroy(&sh->obj.base);
}

static XGL_RESULT shader_create(struct intel_dev *dev,
                                const XGL_SHADER_CREATE_INFO *info,
                                struct intel_shader **sh_ret)
{
    const struct icd_bil_header *bil =
        (const struct icd_bil_header *) info->pCode;
    struct intel_shader *sh;
    XGL_RESULT ret;

    sh = (struct intel_shader *) intel_base_create(dev, sizeof(*sh),
            dev->base.dbg, XGL_DBG_OBJECT_SHADER, info, 0);
    if (!sh)
        return XGL_ERROR_OUT_OF_MEMORY;

    if (dev->exts[INTEL_EXT_COMPILE_GLSL] &&
        info->sType == (XGL_STRUCTURE_TYPE) XGL_INTEL_STRUCTURE_TYPE_SHADER_CREATE_INFO) {
        // use GLSL compiler extension
        ret = shader_parse_glsl(sh, dev->gpu, info->pCode, info->codeSize);
        if (ret != XGL_SUCCESS) {
            shader_destroy(&sh->obj);
            return ret;
        }
    } else {
        if (info->codeSize < sizeof(*bil))
            return XGL_ERROR_INVALID_MEMORY_SIZE;
        if (bil->magic != ICD_BIL_MAGIC)
            return XGL_ERROR_BAD_SHADER_CODE;


        ret = shader_parse_bil(sh, dev->gpu, bil, info->codeSize);
        if (ret != XGL_SUCCESS) {
            shader_destroy(&sh->obj);
            return ret;
        }
    }

    sh->obj.destroy = shader_destroy;

    *sh_ret = sh;

    return XGL_SUCCESS;
}

XGL_RESULT XGLAPI intelCreateShader(
        XGL_DEVICE                                  device,
        const XGL_SHADER_CREATE_INFO*               pCreateInfo,
        XGL_SHADER*                                 pShader)
{
    struct intel_dev *dev = intel_dev(device);

    return shader_create(dev, pCreateInfo, (struct intel_shader **) pShader);
}

XGL_RESULT XGLAPI intelCreateShaderfromGLSL(
        XGL_DEVICE                                  device,
        const XGL_SHADER_CREATE_INFO*               pCreateInfo,
        XGL_SHADER*                                 pShader)
{
    struct intel_dev *dev = intel_dev(device);

    return shader_create(dev, pCreateInfo, (struct intel_shader **) pShader);
}