1/*
2 * Copyright (C) 2009 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 <GLES/glext.h>
19
20#include "rsContext.h"
21#include "rsSampler.h"
22
23
24using namespace android;
25using namespace android::renderscript;
26
27
28Sampler::Sampler(Context *rsc) : ObjectBase(rsc)
29{
30    mAllocFile = __FILE__;
31    mAllocLine = __LINE__;
32    // Should not get called.
33    rsAssert(0);
34}
35
36Sampler::Sampler(Context *rsc,
37                 RsSamplerValue magFilter,
38                 RsSamplerValue minFilter,
39                 RsSamplerValue wrapS,
40                 RsSamplerValue wrapT,
41                 RsSamplerValue wrapR) : ObjectBase(rsc)
42{
43    mAllocFile = __FILE__;
44    mAllocLine = __LINE__;
45    mMagFilter = magFilter;
46    mMinFilter = minFilter;
47    mWrapS = wrapS;
48    mWrapT = wrapT;
49    mWrapR = wrapR;
50}
51
52Sampler::~Sampler()
53{
54}
55
56void Sampler::setupGL(const Context *rsc, bool npot)
57{
58    GLenum trans[] = {
59        GL_NEAREST, //RS_SAMPLER_NEAREST,
60        GL_LINEAR, //RS_SAMPLER_LINEAR,
61        GL_LINEAR_MIPMAP_LINEAR, //RS_SAMPLER_LINEAR_MIP_LINEAR,
62        GL_REPEAT, //RS_SAMPLER_WRAP,
63        GL_CLAMP_TO_EDGE, //RS_SAMPLER_CLAMP
64
65    };
66
67    bool forceNonMip = false;
68    if (!rsc->ext_OES_texture_npot() && npot) {
69        forceNonMip = true;
70    }
71
72    if ((mMinFilter == RS_SAMPLER_LINEAR_MIP_LINEAR) && forceNonMip) {
73        if (rsc->ext_GL_IMG_texture_npot()) {
74            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
75        } else {
76            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
77        }
78    } else {
79        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, trans[mMinFilter]);
80    }
81    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, trans[mMagFilter]);
82    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, trans[mWrapS]);
83    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, trans[mWrapT]);
84
85
86    rsc->checkError("ProgramFragment::setupGL2 tex env");
87}
88
89void Sampler::bindToContext(SamplerState *ss, uint32_t slot)
90{
91    ss->mSamplers[slot].set(this);
92    mBoundSlot = slot;
93}
94
95void Sampler::unbindFromContext(SamplerState *ss)
96{
97    int32_t slot = mBoundSlot;
98    mBoundSlot = -1;
99    ss->mSamplers[slot].clear();
100}
101/*
102void SamplerState::setupGL()
103{
104    for (uint32_t ct=0; ct < RS_MAX_SAMPLER_SLOT; ct++) {
105        Sampler *s = mSamplers[ct].get();
106        if (s) {
107            s->setupGL(rsc);
108        } else {
109            glBindTexture(GL_TEXTURE_2D, 0);
110        }
111    }
112}*/
113
114////////////////////////////////
115
116namespace android {
117namespace renderscript {
118
119
120void rsi_SamplerBegin(Context *rsc)
121{
122    SamplerState * ss = &rsc->mStateSampler;
123
124    ss->mMagFilter = RS_SAMPLER_LINEAR;
125    ss->mMinFilter = RS_SAMPLER_LINEAR;
126    ss->mWrapS = RS_SAMPLER_WRAP;
127    ss->mWrapT = RS_SAMPLER_WRAP;
128    ss->mWrapR = RS_SAMPLER_WRAP;
129}
130
131void rsi_SamplerSet(Context *rsc, RsSamplerParam param, RsSamplerValue value)
132{
133    SamplerState * ss = &rsc->mStateSampler;
134
135    switch(param) {
136    case RS_SAMPLER_MAG_FILTER:
137        ss->mMagFilter = value;
138        break;
139    case RS_SAMPLER_MIN_FILTER:
140        ss->mMinFilter = value;
141        break;
142    case RS_SAMPLER_WRAP_S:
143        ss->mWrapS = value;
144        break;
145    case RS_SAMPLER_WRAP_T:
146        ss->mWrapT = value;
147        break;
148    case RS_SAMPLER_WRAP_R:
149        ss->mWrapR = value;
150        break;
151    }
152
153}
154
155RsSampler rsi_SamplerCreate(Context *rsc)
156{
157    SamplerState * ss = &rsc->mStateSampler;
158
159
160    Sampler * s = new Sampler(rsc,
161                              ss->mMagFilter,
162                              ss->mMinFilter,
163                              ss->mWrapS,
164                              ss->mWrapT,
165                              ss->mWrapR);
166    s->incUserRef();
167    return s;
168}
169
170
171}}
172