1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <GLES/gl.h>
18#include <GLES2/gl2.h>
19#include <GLES/glext.h>
20
21#include <rs_hal.h>
22#include <rsContext.h>
23#include <rsMesh.h>
24
25#include "rsdAllocation.h"
26#include "rsdMeshObj.h"
27#include "rsdGL.h"
28
29#include <string>
30
31using android::renderscript::Allocation;
32using android::renderscript::Context;
33using android::renderscript::Element;
34using android::renderscript::Mesh;
35
36RsdMeshObj::RsdMeshObj(const Context *rsc, const Mesh *rsMesh) {
37    mRSMesh = rsMesh;
38
39    mAttribs = nullptr;
40    mAttribAllocationIndex = nullptr;
41    mGLPrimitives = nullptr;
42
43    mAttribCount = 0;
44}
45
46RsdMeshObj::~RsdMeshObj() {
47    if (mAttribs) {
48        delete[] mAttribs;
49        delete[] mAttribAllocationIndex;
50    }
51    if (mGLPrimitives) {
52        delete[] mGLPrimitives;
53    }
54}
55
56bool RsdMeshObj::isValidGLComponent(const Element *elem, uint32_t fieldIdx) {
57    // Only GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT, GL_FIXED, GL_FLOAT are accepted.
58    // Filter rs types accordingly
59    RsDataType dt = elem->mHal.state.fields[fieldIdx]->mHal.state.dataType;
60    if (dt != RS_TYPE_FLOAT_32 && dt != RS_TYPE_UNSIGNED_8 &&
61        dt != RS_TYPE_UNSIGNED_16 && dt != RS_TYPE_SIGNED_8 &&
62        dt != RS_TYPE_SIGNED_16) {
63        return false;
64    }
65
66    // Now make sure they are not arrays
67    uint32_t arraySize = elem->mHal.state.fieldArraySizes[fieldIdx];
68    if (arraySize != 1) {
69        return false;
70    }
71
72    return true;
73}
74
75bool RsdMeshObj::init(const Context *rsc) {
76
77    updateGLPrimitives(rsc);
78
79    // Count the number of gl attrs to initialize
80    mAttribCount = 0;
81    for (uint32_t ct=0; ct < mRSMesh->mHal.state.vertexBuffersCount; ct++) {
82        const Element *elem = mRSMesh->mHal.state.vertexBuffers[ct]->getType()->getElement();
83        for (uint32_t ct=0; ct < elem->mHal.state.fieldsCount; ct++) {
84            if (isValidGLComponent(elem, ct)) {
85                mAttribCount ++;
86            }
87        }
88    }
89
90    if (mAttribs) {
91        delete [] mAttribs;
92        delete [] mAttribAllocationIndex;
93        mAttribs = nullptr;
94        mAttribAllocationIndex = nullptr;
95    }
96    if (!mAttribCount) {
97        return false;
98    }
99
100    mAttribs = new RsdVertexArray::Attrib[mAttribCount];
101    mAttribAllocationIndex = new uint32_t[mAttribCount];
102
103    uint32_t userNum = 0;
104    for (uint32_t ct=0; ct < mRSMesh->mHal.state.vertexBuffersCount; ct++) {
105        const Element *elem = mRSMesh->mHal.state.vertexBuffers[ct]->getType()->getElement();
106        uint32_t stride = elem->mHal.state.elementSizeBytes;
107        for (uint32_t fieldI=0; fieldI < elem->mHal.state.fieldsCount; fieldI++) {
108            const Element *f = elem->mHal.state.fields[fieldI];
109
110            if (!isValidGLComponent(elem, fieldI)) {
111                continue;
112            }
113
114            mAttribs[userNum].size = f->mHal.state.vectorSize;
115            mAttribs[userNum].offset = elem->mHal.state.fieldOffsetBytes[fieldI];
116            mAttribs[userNum].type = rsdTypeToGLType(f->mHal.state.dataType);
117            mAttribs[userNum].normalized = f->mHal.state.dataType != RS_TYPE_FLOAT_32;
118            mAttribs[userNum].stride = stride;
119            std::string tmp(RS_SHADER_ATTR);
120            tmp.append(elem->mHal.state.fieldNames[fieldI]);
121            mAttribs[userNum].name = tmp;
122
123            // Remember which allocation this attribute came from
124            mAttribAllocationIndex[userNum] = ct;
125            userNum ++;
126        }
127    }
128
129    return true;
130}
131
132void RsdMeshObj::renderPrimitiveRange(const Context *rsc, uint32_t primIndex,
133                                      size_t start, uint32_t len) const {
134    if (len < 1 || primIndex >= mRSMesh->mHal.state.primitivesCount || mAttribCount == 0) {
135        rsc->setError(RS_ERROR_FATAL_DRIVER, "Invalid mesh or parameters");
136        return;
137    }
138
139    for (uint32_t ct=0; ct < mRSMesh->mHal.state.vertexBuffersCount; ct++) {
140        const Allocation *alloc = mRSMesh->mHal.state.vertexBuffers[ct];
141        DrvAllocation *drv = (DrvAllocation *)alloc->mHal.drv;
142        if (drv->uploadDeferred) {
143            rsdAllocationSyncAll(rsc, alloc, RS_ALLOCATION_USAGE_SCRIPT);
144        }
145    }
146
147    // update attributes with either buffer information or data ptr based on their current state
148    for (uint32_t ct=0; ct < mAttribCount; ct++) {
149        uint32_t allocIndex = mAttribAllocationIndex[ct];
150        Allocation *alloc = mRSMesh->mHal.state.vertexBuffers[allocIndex];
151        DrvAllocation *drvAlloc = (DrvAllocation *)alloc->mHal.drv;
152
153        if (drvAlloc->bufferID) {
154            mAttribs[ct].buffer = drvAlloc->bufferID;
155            mAttribs[ct].ptr = nullptr;
156        } else {
157            mAttribs[ct].buffer = 0;
158            mAttribs[ct].ptr = (const uint8_t*)alloc->mHal.drvState.lod[0].mallocPtr;
159        }
160    }
161
162    RsdVertexArray va(mAttribs, mAttribCount);
163    va.setup(rsc);
164
165    const Allocation *idxAlloc = mRSMesh->mHal.state.indexBuffers[primIndex];
166    if (idxAlloc) {
167        DrvAllocation *drvAlloc = (DrvAllocation *)idxAlloc->mHal.drv;
168        if (drvAlloc->uploadDeferred) {
169            rsdAllocationSyncAll(rsc, idxAlloc, RS_ALLOCATION_USAGE_SCRIPT);
170        }
171
172        if (drvAlloc->bufferID) {
173            RSD_CALL_GL(glBindBuffer, GL_ELEMENT_ARRAY_BUFFER, drvAlloc->bufferID);
174            RSD_CALL_GL(glDrawElements, mGLPrimitives[primIndex], len, GL_UNSIGNED_SHORT,
175                        (uint16_t *)(start * 2));
176        } else {
177            RSD_CALL_GL(glBindBuffer, GL_ELEMENT_ARRAY_BUFFER, 0);
178            RSD_CALL_GL(glDrawElements, mGLPrimitives[primIndex], len, GL_UNSIGNED_SHORT,
179                        idxAlloc->mHal.drvState.lod[0].mallocPtr);
180        }
181    } else {
182        RSD_CALL_GL(glDrawArrays, mGLPrimitives[primIndex], start, len);
183    }
184
185    rsdGLCheckError(rsc, "Mesh::renderPrimitiveRange");
186}
187
188void RsdMeshObj::updateGLPrimitives(const Context *rsc) {
189    mGLPrimitives = new uint32_t[mRSMesh->mHal.state.primitivesCount];
190    for (uint32_t i = 0; i < mRSMesh->mHal.state.primitivesCount; i ++) {
191        switch (mRSMesh->mHal.state.primitives[i]) {
192            case RS_PRIMITIVE_POINT:          mGLPrimitives[i] = GL_POINTS; break;
193            case RS_PRIMITIVE_LINE:           mGLPrimitives[i] = GL_LINES; break;
194            case RS_PRIMITIVE_LINE_STRIP:     mGLPrimitives[i] = GL_LINE_STRIP; break;
195            case RS_PRIMITIVE_TRIANGLE:       mGLPrimitives[i] = GL_TRIANGLES; break;
196            case RS_PRIMITIVE_TRIANGLE_STRIP: mGLPrimitives[i] = GL_TRIANGLE_STRIP; break;
197            case RS_PRIMITIVE_TRIANGLE_FAN:   mGLPrimitives[i] = GL_TRIANGLE_FAN; break;
198            default: rsc->setError(RS_ERROR_FATAL_DRIVER, "Invalid mesh primitive"); break;
199        }
200    }
201}
202