/****************************************************************************
 * Copyright (C) 2015 Dimok
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ****************************************************************************/
#include <malloc.h>
#include <string.h>
#include <gui/video/shaders/Shader3D.h>

static const uint32_t cpVertexShaderProgram[] = {
    0x00000000,0x00008009,0x20000000,0x0000e4a1,
    0x00c00100,0x88048093,0x01c00300,0x98060014,
    0x9a000000,0x000058a0,0x3c200200,0x88062094,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x0765a101,0x9000e00f,0x0761a101,0x9000e02f,
    0x01081f00,0x900ce040,0x01041f00,0x900ce060,
    0x01001f80,0x900ce000,0x02001f00,0x900c6000,
    0x02041f00,0x900c6020,0x076da101,0x9000e04f,
    0x0769a181,0x9000e06f,0x0745a101,0x9000c00f,
    0x0741a181,0x9000c02f,0x074da101,0x9000c04f,
    0x0749a181,0x9000c06f,0x0bc9a000,0x7f00e20f,
    0x0bc92080,0x7f04e22f,0x0bc9a001,0x7f08e24f,
    0x0bc92081,0x7f0ce26f,0x0725a101,0x9000a00f,
    0x0721a181,0x9000a02f,0x072da101,0x9000a04f,
    0x0729a181,0x9000a06f,0x0ac9a000,0x7e00c20f,
    0x0ac92080,0x7e04c22f,0x0ac9a001,0x7e08c24f,
    0x0ac92081,0x7e0cc26f,0x0ba5a000,0x7f00e20f,
    0x0ba52080,0x7f04e22f,0x0ba5a001,0x7f08e24f,
    0x0ba52081,0x7f0ce26f,0x08eda000,0x9000800f,
    0x08ed2080,0x9000802f,0x08eda001,0x9000804f,
    0x08ed2081,0x9000806f,0x09c9a000,0x7d00a20f,
    0x09c92080,0x7d04a22f,0x09c9a001,0x7d08a24f,
    0x09c92081,0x7d0ca26f,0x0aa5a000,0x7e00c20f,
    0x0aa52080,0x7e04c22f,0x0aa5a001,0x7e08c24f,
    0x0aa52081,0x7e0cc26f,0x0b81a000,0x7f004200,
    0x0b812080,0x7f044220,0x0b81a001,0x7f082240,
    0x0b812081,0x7f0c0260,0x08c9a000,0x7c00820f,
    0x08c92080,0x7c04822f,0x08c9a001,0x7c08824f,
    0x08c92081,0x7c0c826f,0x09a5a000,0x7d00a20f,
    0x09a52080,0x7d04a22f,0x09a5a001,0x7d08a24f,
    0x09a52081,0x7d0ca26f,0x0a81a000,0x7e000200,
    0x0a812080,0x7e040220,0x0a81a001,0x7e080240,
    0x0a812081,0x7e0c2260,0x0240a001,0x9000c00f,
    0x0244a001,0x9000c02f,0x0148a001,0x9000c04f,
    0x004ca001,0x9000c06f,0x0264a081,0x9000e02f,
    0x0260a001,0x9000e00f,0x0224a001,0x90002020,
    0x0168a001,0x9000e04f,0x006ca001,0x9000e06f,
    0x0220a081,0x90002000,0x08a5a000,0x7c00820f,
    0x08a52080,0x7c04822f,0x08a5a001,0x7c08824f,
    0x08a52081,0x7c0c826f,0x0981a000,0x7d008200,
    0x09812080,0x7d048220,0x0981a001,0x7d084240,
    0x09812081,0x7d0c4260,0x02090000,0x7e00c20f,
    0x02098000,0x7e04c22f,0x0128a001,0x9000a04f,
    0x002ca001,0x9000c06f,0x02298081,0x7e0caa6f,
    0x03090000,0x7f00e20f,0x03098000,0x7f04e22f,
    0x02090001,0x7e08f64f,0x03298001,0x7f0ce26f,
    0x03090081,0x7f08ca4f,0x0881a000,0x7c00c200,
    0x08812080,0x7c04e220,0x0881a001,0x7c08a240,
    0x08812081,0x7c0c8260,0x0200a001,0x9000800f,
    0x0204a001,0x9000802f,0x0108a001,0x9000804f,
    0x000ca001,0x9000806f,0x01098080,0x0104aa2f,
    0x01090000,0x0100a20f,0x02858000,0x7e04c22f,
    0x01090001,0x7d08a24f,0x01298081,0x7e0cc26f,
    0x02850000,0x7e00f60f,0x03858000,0x7f04622f,
    0x02450001,0x7f08e24f,0x02458001,0x7d0ca26f,
    0x03850080,0x7f00ca0f,0x00090000,0x7c004200,
    0x00098000,0x7c04b220,0x03450001,0x7e08c24f,
    0x03458001,0x7f0ce26f,0x03e18080,0xfe042620,
    0x01850000,0x7d00a200,0x01858000,0x7d04622f,
    0x00090001,0x7c086240,0x00298081,0x7c0c0260,
    0x02c10000,0x7f000200,0x02e18000,0x7e040620,
    0x01450001,0x7d088240,0x01458001,0x7e0c6260,
    0x01e18080,0xfe04c620,0x03c10000,0x7e002200,
    0x03818001,0x7f0c4220,0x02a10001,0x7f081640,
    0x02818001,0x7d0c3660,0x03a10081,0x7e082a40,
    0x07080000,0x0100c20f,0x07088000,0x0104622f,
    0x00458001,0x000cea4f,0x07288081,0x0204f66f,
    0x00850000,0x0200620f,0x00858000,0x05046a2f,
    0x07080001,0x0108c24f,0x01818001,0x030c726f,
    0x07cc8080,0xfe04c22f,0x01c10000,0x0500660f,
    0x00e18000,0xfe04622f,0x00450001,0x0308624f,
    0x07cc9f01,0x7f0ce26f,0x00c10080,0xfe00e60f,
    0x07cc1f00,0x7e00660f,0x00a10001,0xfe08c22f,
    0x01a10001,0x0408624f,0x00818001,0x7f086a6f,
    0x07c09f80,0x7e048200,0x07e00f00,0xfe008220,
    0x07cc1f01,0x7e086a4f,0x07c09f81,0x7f0c8240,
    0x07c08f80,0xfe088260,0x2c34800d,0xe3b4f15e,
    0x7642ed30,0x7408600d
};

static const uint32_t cpVertexShaderRegs[] = {
    0x00000108,0x00000000,0x00000002,0x00000001,
    0xffff0001,0xffffffff,0xffffffff,0xffffffff,
    0xffffffff,0xffffffff,0xffffffff,0xffffffff,
    0xffffffff,0xffffffff,0x00000000,0xfffffffc,
    0x00000002,0x00000000,0x00000001,0x000000ff,
    0x000000ff,0x000000ff,0x000000ff,0x000000ff,
    0x000000ff,0x000000ff,0x000000ff,0x000000ff,
    0x000000ff,0x000000ff,0x000000ff,0x000000ff,
    0x000000ff,0x000000ff,0x000000ff,0x000000ff,
    0x000000ff,0x000000ff,0x000000ff,0x000000ff,
    0x000000ff,0x000000ff,0x000000ff,0x000000ff,
    0x000000ff,0x000000ff,0x000000ff,0x000000ff,
    0x000000ff,0x00000000,0x0000000e,0x00000010
};

static const uint32_t cPixelShaderProgram[] = {
    0x20000000,0x000008a4,0x03000000,0x01004085,
    0x23000000,0x000044a8,0x35000000,0x000000a4,
    0x06000000,0x01004085,0x36000000,0x00002ca8,
    0x50000000,0x0000c080,0x42000000,0x00001ca0,
    0x00800000,0x88062094,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0xfd001f80,0x900c0060,0x0000803f,0x00000000,
    0x02011f80,0x8c110000,0xf8402000,0x9006a00f,
    0x02552001,0x00000020,0x01248082,0x80020060,
    0xfe3c1f00,0x1000e04f,0xfe041f80,0x1033c00f,
    0xfe482081,0x80060020,0xfee40f81,0x0289e30f,
    0x02c51f80,0x80060060,0xfeec0f80,0x0285634f,
    0xfec80f80,0x80000060,0xfe4ca081,0x9000e04f,
    0xfe281f00,0x80060000,0xf8c01f81,0x9006e02f,
    0xfee00f81,0xfd80636f,0x0000803f,0x00000000,
    0x7fc49f81,0xf880e34f,0xfe381f80,0x00000000,
    0x7de00f81,0xfe800360,0x01011f80,0x8c100000,
    0x00a81f00,0x9000e02f,0x00000082,0x80020060,
    0x00002040,0x00000000,0xfeac9f80,0xfd00624f,
    0x3333333f,0x00002040,0xfee88f80,0x0101620f,
    0x00cc1f80,0x9000e06f,0xf8c09f01,0x80060020,
    0xfe2c1f80,0x9006e04f,0xfee48f81,0xf880630f,
    0x7fc81f80,0xfd800360,0x0000803f,0x00000000,
    0x000ca001,0x80000000,0x00091f00,0x800c0020,
    0x00051f00,0x800c0040,0x00011f80,0x800c0060,
    0xfe2c0000,0x90002000,0xfe288000,0x90002020,
    0xfe240001,0x90002040,0xfe208081,0x90002060,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x10000100,0x01100df0,0x00008010,0xecdfea0d,
    0x99720984,0x041cab0d,0xa28a9ccd,0x95d199a5
};
static const uint32_t cPixelShaderRegs[] = {
    0x00000102,0x00000002,0x14000002,0x00000000,
    0x00000002,0x00000100,0x00000101,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x00000000,0x00000000,0x00000000,
    0x00000000,0x0000000f,0x00000001,0x00000010,
    0x00000000
};

Shader3D * Shader3D::shaderInstance = NULL;

Shader3D::Shader3D()
    : vertexShader(cuAttributeCount) {
    //! create pixel shader
    pixelShader.setProgram(cPixelShaderProgram, sizeof(cPixelShaderProgram), cPixelShaderRegs, sizeof(cPixelShaderRegs));

    colorIntensityLocation = 0;
    fadeDistanceLocation = 4;
    fadeOutLocation = 8;
    pixelShader.addUniformVar((GX2UniformVar) {
        "unf_color_intensity", GX2_SHADER_VAR_TYPE_FLOAT4, 1, colorIntensityLocation, -1
    });
    pixelShader.addUniformVar((GX2UniformVar) {
        "unf_fade_distance", GX2_SHADER_VAR_TYPE_FLOAT, 1, fadeDistanceLocation, -1
    });
    pixelShader.addUniformVar((GX2UniformVar) {
        "unf_fade_out_alpha", GX2_SHADER_VAR_TYPE_FLOAT4, 1, fadeOutLocation, -1
    });

    samplerLocation = 0;
    pixelShader.addSamplerVar((GX2SamplerVar) {
        "sampl_texture", GX2_SAMPLER_VAR_TYPE_SAMPLER_2D, samplerLocation
    });
    //! create vertex shader
    vertexShader.setProgram(cpVertexShaderProgram, sizeof(cpVertexShaderProgram), cpVertexShaderRegs, sizeof(cpVertexShaderRegs));

    modelMatrixLocation = 0;
    projectionMatrixLocation = 16;
    viewMatrixLocation = 32;
    vertexShader.addUniformVar((GX2UniformVar) {
        "modelMatrix", GX2_SHADER_VAR_TYPE_MATRIX4X4, 1, modelMatrixLocation, -1
    });
    vertexShader.addUniformVar((GX2UniformVar) {
        "viewMatrix", GX2_SHADER_VAR_TYPE_MATRIX4X4, 1, projectionMatrixLocation, -1
    });
    vertexShader.addUniformVar((GX2UniformVar) {
        "projectionMatrix", GX2_SHADER_VAR_TYPE_MATRIX4X4, 1, viewMatrixLocation, -1
    });

    positionLocation = 0;
    texCoordLocation = 1;
    vertexShader.addAttribVar((GX2AttribVar) {
        "attr_position", GX2_SHADER_VAR_TYPE_FLOAT4, 0, positionLocation
    });
    vertexShader.addAttribVar((GX2AttribVar) {
        "attr_texture_coord", GX2_SHADER_VAR_TYPE_FLOAT2, 0, texCoordLocation
    });

    //! setup attribute streams
    GX2InitAttribStream(vertexShader.getAttributeBuffer(0), positionLocation, 0, 0, GX2_ATTRIB_FORMAT_FLOAT_32_32_32);
    GX2InitAttribStream(vertexShader.getAttributeBuffer(1), texCoordLocation, 1, 0, GX2_ATTRIB_FORMAT_FLOAT_32_32);

    //! create fetch shader
    fetchShader = new FetchShader(vertexShader.getAttributeBuffer(), vertexShader.getAttributesCount());

    //! initialize default quad texture vertexes as those are very commonly used
    //! model vertex has to be align and cannot be in unknown regions for GX2 like 0xBCAE1000
    posVtxs = (float*)memalign(GX2_VERTEX_BUFFER_ALIGNMENT, ciPositionVtxsSize);
    texCoords = (float*)memalign(GX2_VERTEX_BUFFER_ALIGNMENT, ciTexCoordsVtxsSize);

    //! position vertex structure and texture coordinate vertex structure
    int32_t i = 0;
    posVtxs[i++] = -1.0f;
    posVtxs[i++] = -1.0f;
    posVtxs[i++] = 0.0f;
    posVtxs[i++] =  1.0f;
    posVtxs[i++] = -1.0f;
    posVtxs[i++] = 0.0f;
    posVtxs[i++] =  1.0f;
    posVtxs[i++] =  1.0f;
    posVtxs[i++] = 0.0f;
    posVtxs[i++] = -1.0f;
    posVtxs[i++] =  1.0f;
    posVtxs[i++] = 0.0f;
    GX2Invalidate(GX2_INVALIDATE_MODE_CPU_ATTRIBUTE_BUFFER, posVtxs, ciPositionVtxsSize);

    i = 0;
    texCoords[i++] = 0.0f;
    texCoords[i++] = 1.0f;
    texCoords[i++] = 1.0f;
    texCoords[i++] = 1.0f;
    texCoords[i++] = 1.0f;
    texCoords[i++] = 0.0f;
    texCoords[i++] = 0.0f;
    texCoords[i++] = 0.0f;
    GX2Invalidate(GX2_INVALIDATE_MODE_CPU_ATTRIBUTE_BUFFER, texCoords, ciTexCoordsVtxsSize);
}

Shader3D::~Shader3D() {
    if(posVtxs) {
        free(posVtxs);
        posVtxs = NULL;
    }
    if(texCoords) {
        free(texCoords);
        texCoords = NULL;
    }

    delete fetchShader;
    fetchShader = NULL;
}