Texture.cpp revision ab12c1fe73734a18ac19a06b97f276528f6d027a 
1/*
2 * Copyright (C) 2013 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 "Caches.h"
18#include "Texture.h"
19#include "utils/GLUtils.h"
20#include "utils/TraceUtils.h"
21
22#include <utils/Log.h>
23
24#include <SkCanvas.h>
25
26namespace android {
27namespace uirenderer {
28
29// Number of bytes used by a texture in the given format
30static int bytesPerPixel(GLint glFormat) {
31    switch (glFormat) {
32    // The wrapped-texture case, usually means a SurfaceTexture
33    case 0:
34        return 0;
35    case GL_LUMINANCE:
36    case GL_ALPHA:
37        return 1;
38    case GL_SRGB8:
39    case GL_RGB:
40        return 3;
41    case GL_SRGB8_ALPHA8:
42    case GL_RGBA:
43        return 4;
44    case GL_RGBA16F:
45        return 8;
46    default:
47        LOG_ALWAYS_FATAL("UNKNOWN FORMAT %d", glFormat);
48    }
49}
50
51void Texture::setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture, bool force) {
52
53    if (force || wrapS != mWrapS || wrapT != mWrapT) {
54        mWrapS = wrapS;
55        mWrapT = wrapT;
56
57        if (bindTexture) {
58            mCaches.textureState().bindTexture(mTarget, mId);
59        }
60
61        glTexParameteri(mTarget, GL_TEXTURE_WRAP_S, wrapS);
62        glTexParameteri(mTarget, GL_TEXTURE_WRAP_T, wrapT);
63    }
64}
65
66void Texture::setFilterMinMag(GLenum min, GLenum mag, bool bindTexture, bool force) {
67    if (force || min != mMinFilter || mag != mMagFilter) {
68        mMinFilter = min;
69        mMagFilter = mag;
70
71        if (bindTexture) {
72            mCaches.textureState().bindTexture(mTarget, mId);
73        }
74
75        if (mipMap && min == GL_LINEAR) min = GL_LINEAR_MIPMAP_LINEAR;
76
77        glTexParameteri(mTarget, GL_TEXTURE_MIN_FILTER, min);
78        glTexParameteri(mTarget, GL_TEXTURE_MAG_FILTER, mag);
79    }
80}
81
82void Texture::deleteTexture() {
83    mCaches.textureState().deleteTexture(mId);
84    mId = 0;
85    mTarget = GL_NONE;
86    if (mEglImageHandle != EGL_NO_IMAGE_KHR) {
87        EGLDisplay eglDisplayHandle = eglGetCurrentDisplay();
88        eglDestroyImageKHR(eglDisplayHandle, mEglImageHandle);
89        mEglImageHandle = EGL_NO_IMAGE_KHR;
90    }
91}
92
93bool Texture::updateSize(uint32_t width, uint32_t height, GLint internalFormat,
94        GLint format, GLenum target) {
95    if (mWidth == width
96            && mHeight == height
97            && mFormat == format
98            && mInternalFormat == internalFormat
99            && mTarget == target) {
100        return false;
101    }
102    mWidth = width;
103    mHeight = height;
104    mFormat = format;
105    mInternalFormat = internalFormat;
106    mTarget = target;
107    notifySizeChanged(mWidth * mHeight * bytesPerPixel(internalFormat));
108    return true;
109}
110
111void Texture::resetCachedParams() {
112    mWrapS = GL_REPEAT;
113    mWrapT = GL_REPEAT;
114    mMinFilter = GL_NEAREST_MIPMAP_LINEAR;
115    mMagFilter = GL_LINEAR;
116}
117
118void Texture::upload(GLint internalFormat, uint32_t width, uint32_t height,
119        GLenum format, GLenum type, const void* pixels) {
120    GL_CHECKPOINT(MODERATE);
121    bool needsAlloc = updateSize(width, height, internalFormat, format, GL_TEXTURE_2D);
122    if (!mId) {
123        glGenTextures(1, &mId);
124        needsAlloc = true;
125        resetCachedParams();
126    }
127    mCaches.textureState().bindTexture(GL_TEXTURE_2D, mId);
128    if (needsAlloc) {
129        glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, mWidth, mHeight, 0,
130                format, type, pixels);
131    } else if (pixels) {
132        glTexSubImage2D(GL_TEXTURE_2D, 0, internalFormat, mWidth, mHeight, 0,
133                format, type, pixels);
134    }
135    GL_CHECKPOINT(MODERATE);
136}
137
138void Texture::uploadHardwareBitmapToTexture(GraphicBuffer* buffer) {
139    EGLDisplay eglDisplayHandle = eglGetCurrentDisplay();
140    if (mEglImageHandle != EGL_NO_IMAGE_KHR) {
141        eglDestroyImageKHR(eglDisplayHandle, mEglImageHandle);
142        mEglImageHandle = EGL_NO_IMAGE_KHR;
143    }
144    mEglImageHandle = eglCreateImageKHR(eglDisplayHandle, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
145            buffer->getNativeBuffer(), 0);
146    glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, mEglImageHandle);
147}
148
149static void uploadToTexture(bool resize, GLint internalFormat, GLenum format, GLenum type,
150        GLsizei stride, GLsizei bpp, GLsizei width, GLsizei height, const GLvoid * data) {
151
152    const bool useStride = stride != width
153            && Caches::getInstance().extensions().hasUnpackRowLength();
154    if ((stride == width) || useStride) {
155        if (useStride) {
156            glPixelStorei(GL_UNPACK_ROW_LENGTH, stride);
157        }
158
159        if (resize) {
160            glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, type, data);
161        } else {
162            glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, data);
163        }
164
165        if (useStride) {
166            glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
167        }
168    } else {
169        //  With OpenGL ES 2.0 we need to copy the bitmap in a temporary buffer
170        //  if the stride doesn't match the width
171
172        GLvoid * temp = (GLvoid *) malloc(width * height * bpp);
173        if (!temp) return;
174
175        uint8_t * pDst = (uint8_t *)temp;
176        uint8_t * pSrc = (uint8_t *)data;
177        for (GLsizei i = 0; i < height; i++) {
178            memcpy(pDst, pSrc, width * bpp);
179            pDst += width * bpp;
180            pSrc += stride * bpp;
181        }
182
183        if (resize) {
184            glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, type, temp);
185        } else {
186            glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, temp);
187        }
188
189        free(temp);
190    }
191}
192
193void Texture::colorTypeToGlFormatAndType(const Caches& caches, SkColorType colorType,
194        bool needSRGB, GLint* outInternalFormat, GLint* outFormat, GLint* outType) {
195    switch (colorType) {
196    case kAlpha_8_SkColorType:
197        *outFormat = GL_ALPHA;
198        *outInternalFormat = GL_ALPHA;
199        *outType = GL_UNSIGNED_BYTE;
200        break;
201    case kRGB_565_SkColorType:
202        if (needSRGB) {
203            // We would ideally use a GL_RGB/GL_SRGB8 texture but the
204            // intermediate Skia bitmap needs to be ARGB_8888
205            *outFormat = GL_RGBA;
206            *outInternalFormat = caches.rgbaInternalFormat();
207            *outType = GL_UNSIGNED_BYTE;
208        } else {
209            *outFormat = GL_RGB;
210            *outInternalFormat = GL_RGB;
211            *outType = GL_UNSIGNED_SHORT_5_6_5;
212        }
213        break;
214    // ARGB_4444 and Index_8 are both upconverted to RGBA_8888
215    case kARGB_4444_SkColorType:
216    case kIndex_8_SkColorType:
217    case kN32_SkColorType:
218        *outFormat = GL_RGBA;
219        *outInternalFormat = caches.rgbaInternalFormat(needSRGB);
220        *outType = GL_UNSIGNED_BYTE;
221        break;
222    case kGray_8_SkColorType:
223        // TODO: Handle sRGB
224        *outFormat = GL_LUMINANCE;
225        *outInternalFormat = GL_LUMINANCE;
226        *outType = GL_UNSIGNED_BYTE;
227        break;
228    default:
229        LOG_ALWAYS_FATAL("Unsupported bitmap colorType: %d", colorType);
230        break;
231    }
232}
233
234SkBitmap Texture::uploadToN32(const SkBitmap& bitmap, bool hasSRGB, sk_sp<SkColorSpace> sRGB) {
235    SkBitmap rgbaBitmap;
236    rgbaBitmap.allocPixels(SkImageInfo::MakeN32(bitmap.width(), bitmap.height(),
237            bitmap.info().alphaType(), hasSRGB ? sRGB : nullptr));
238    rgbaBitmap.eraseColor(0);
239    SkCanvas canvas(rgbaBitmap);
240    canvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
241    return rgbaBitmap;
242}
243
244bool Texture::hasUnsupportedColorType(const SkImageInfo& info, bool hasSRGB, SkColorSpace* sRGB) {
245    bool needSRGB = info.colorSpace() == sRGB;
246    return info.colorType() == kARGB_4444_SkColorType
247        || info.colorType() == kIndex_8_SkColorType
248        || (info.colorType() == kRGB_565_SkColorType && hasSRGB && needSRGB);
249}
250
251
252void Texture::upload(Bitmap& bitmap) {
253    if (!bitmap.readyToDraw()) {
254        ALOGE("Cannot generate texture from bitmap");
255        return;
256    }
257
258    ATRACE_FORMAT("Upload %ux%u Texture", bitmap.width(), bitmap.height());
259
260    // We could also enable mipmapping if both bitmap dimensions are powers
261    // of 2 but we'd have to deal with size changes. Let's keep this simple
262    const bool canMipMap = mCaches.extensions().hasNPot();
263
264    // If the texture had mipmap enabled but not anymore,
265    // force a glTexImage2D to discard the mipmap levels
266    bool needsAlloc = canMipMap && mipMap && !bitmap.hasHardwareMipMap();
267    bool setDefaultParams = false;
268
269    if (!mId) {
270        glGenTextures(1, &mId);
271        needsAlloc = true;
272        setDefaultParams = true;
273    }
274
275    sk_sp<SkColorSpace> sRGB = SkColorSpace::MakeNamed(SkColorSpace::kSRGB_Named);
276    bool needSRGB = bitmap.info().colorSpace() == sRGB.get();
277
278    GLint internalFormat, format, type;
279    colorTypeToGlFormatAndType(mCaches, bitmap.colorType(), needSRGB, &internalFormat, &format, &type);
280
281    GLenum target = bitmap.isHardware() ? GL_TEXTURE_EXTERNAL_OES : GL_TEXTURE_2D;
282    needsAlloc |= updateSize(bitmap.width(), bitmap.height(), internalFormat, format, target);
283
284    blend = !bitmap.isOpaque();
285    mCaches.textureState().bindTexture(mTarget, mId);
286
287    // TODO: Handle sRGB gray bitmaps
288    bool hasSRGB = mCaches.extensions().hasSRGB();
289    if (CC_UNLIKELY(hasUnsupportedColorType(bitmap.info(), hasSRGB, sRGB.get()))) {
290        SkBitmap skBitmap;
291        bitmap.getSkBitmap(&skBitmap);
292        SkBitmap rgbaBitmap = uploadToN32(skBitmap, hasSRGB, std::move(sRGB));
293        uploadToTexture(needsAlloc, internalFormat, format, type, rgbaBitmap.rowBytesAsPixels(),
294                rgbaBitmap.bytesPerPixel(), rgbaBitmap.width(),
295                rgbaBitmap.height(), rgbaBitmap.getPixels());
296    } else if (bitmap.isHardware()) {
297        uploadHardwareBitmapToTexture(bitmap.graphicBuffer());
298    } else {
299        uploadToTexture(needsAlloc, internalFormat, format, type, bitmap.rowBytesAsPixels(),
300                bitmap.info().bytesPerPixel(), bitmap.width(), bitmap.height(), bitmap.pixels());
301    }
302
303    if (canMipMap) {
304        mipMap = bitmap.hasHardwareMipMap();
305        if (mipMap) {
306            glGenerateMipmap(GL_TEXTURE_2D);
307        }
308    }
309
310    if (setDefaultParams) {
311        setFilter(GL_NEAREST);
312        setWrap(GL_CLAMP_TO_EDGE);
313    }
314}
315
316void Texture::wrap(GLuint id, uint32_t width, uint32_t height,
317        GLint internalFormat, GLint format, GLenum target) {
318    mId = id;
319    mWidth = width;
320    mHeight = height;
321    mFormat = format;
322    mInternalFormat = internalFormat;
323    mTarget = target;
324    // We're wrapping an existing texture, so don't double count this memory
325    notifySizeChanged(0);
326}
327
328}; // namespace uirenderer
329}; // namespace android
330