Home | History | Annotate | Download | only in opengl 
      1 /*-------------------------------------------------------------------------
      2  * drawElements Quality Program OpenGL ES Utilities
      3  * ------------------------------------------------
      4  *
      5  * Copyright 2014 The Android Open Source Project
      6  *
      7  * Licensed under the Apache License, Version 2.0 (the "License");
      8  * you may not use this file except in compliance with the License.
      9  * You may obtain a copy of the License at
     10  *
     11  *      http://www.apache.org/licenses/LICENSE-2.0
     12  *
     13  * Unless required by applicable law or agreed to in writing, software
     14  * distributed under the License is distributed on an "AS IS" BASIS,
     15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     16  * See the License for the specific language governing permissions and
     17  * limitations under the License.
     18  *
     19  *//*!
     20  * \file
     21  * \brief OpenGL ES Pixel Transfer Utilities.
     22  *//*--------------------------------------------------------------------*/
     23 
     24 #include "gluPixelTransfer.hpp"
     25 #include "gluTextureUtil.hpp"
     26 #include "gluRenderContext.hpp"
     27 #include "glwEnums.hpp"
     28 #include "glwFunctions.hpp"
     29 #include "tcuTexture.hpp"
     30 #include "tcuSurface.hpp"
     31 #include "deMemory.h"
     32 
     33 namespace glu
     34 {
     35 
     36 static inline int getTransferAlignment (tcu::TextureFormat format)
     37 {
     38 	int pixelSize = format.getPixelSize();
     39 	if (deIsPowerOfTwo32(pixelSize))
     40 		return de::min(pixelSize, 8);
     41 	else
     42 		return 1;
     43 }
     44 
     45 /*--------------------------------------------------------------------*//*!
     46  * \brief Read pixels to pixel buffer access.
     47  * \note Stride must be default stride for format.
     48  *//*--------------------------------------------------------------------*/
     49 void readPixels (const RenderContext& context, int x, int y, const tcu::PixelBufferAccess& dst)
     50 {
     51 	const glw::Functions& gl = context.getFunctions();
     52 
     53 	TCU_CHECK_INTERNAL(dst.getDepth() == 1);
     54 	TCU_CHECK_INTERNAL(dst.getRowPitch() == dst.getFormat().getPixelSize()*dst.getWidth());
     55 
     56 	int				width		= dst.getWidth();
     57 	int				height		= dst.getHeight();
     58 	TransferFormat	format		= getTransferFormat(dst.getFormat());
     59 
     60 	gl.pixelStorei(GL_PACK_ALIGNMENT, getTransferAlignment(dst.getFormat()));
     61 	gl.readPixels(x, y, width, height, format.format, format.dataType, dst.getDataPtr());
     62 }
     63 
     64 /*--------------------------------------------------------------------*//*!
     65  * \brief Upload pixels from pixel buffer access.
     66  * \note Stride must be default stride for format.
     67  *//*--------------------------------------------------------------------*/
     68 void texImage2D (const RenderContext& context, deUint32 target, int level, deUint32 internalFormat, const tcu::ConstPixelBufferAccess& src)
     69 {
     70 	const glw::Functions& gl = context.getFunctions();
     71 
     72 	TCU_CHECK_INTERNAL(src.getDepth() == 1);
     73 	TCU_CHECK_INTERNAL(src.getRowPitch() == src.getFormat().getPixelSize()*src.getWidth());
     74 
     75 	int				width		= src.getWidth();
     76 	int				height		= src.getHeight();
     77 	TransferFormat	format		= getTransferFormat(src.getFormat());
     78 
     79 	gl.pixelStorei(GL_UNPACK_ALIGNMENT, getTransferAlignment(src.getFormat()));
     80 	gl.texImage2D(target, level, internalFormat, width, height, 0, format.format, format.dataType, src.getDataPtr());
     81 }
     82 
     83 /*--------------------------------------------------------------------*//*!
     84  * \brief Upload pixels from pixel buffer access.
     85  * \note Stride must be default stride for format.
     86  *//*--------------------------------------------------------------------*/
     87 void texImage3D (const RenderContext& context, deUint32 target, int level, deUint32 internalFormat, const tcu::ConstPixelBufferAccess& src)
     88 {
     89 	const glw::Functions& gl = context.getFunctions();
     90 
     91 	TCU_CHECK_INTERNAL(src.getRowPitch() == src.getFormat().getPixelSize()*src.getWidth());
     92 	TCU_CHECK_INTERNAL(src.getSlicePitch() == src.getRowPitch()*src.getHeight());
     93 
     94 	int				width		= src.getWidth();
     95 	int				height		= src.getHeight();
     96 	int				depth		= src.getDepth();
     97 	TransferFormat	format		= getTransferFormat(src.getFormat());
     98 
     99 	gl.pixelStorei(GL_UNPACK_ALIGNMENT, getTransferAlignment(src.getFormat()));
    100 	gl.texImage3D(target, level, internalFormat, width, height, depth, 0, format.format, format.dataType, src.getDataPtr());
    101 }
    102 
    103 /*--------------------------------------------------------------------*//*!
    104  * \brief Upload pixels from pixel buffer access.
    105  * \note Stride must be default stride for format.
    106  *//*--------------------------------------------------------------------*/
    107 void texSubImage2D (const RenderContext& context, deUint32 target, int level, int x, int y, const tcu::ConstPixelBufferAccess& src)
    108 {
    109 	const glw::Functions& gl = context.getFunctions();
    110 
    111 	TCU_CHECK_INTERNAL(src.getDepth() == 1);
    112 	TCU_CHECK_INTERNAL(src.getRowPitch() == src.getFormat().getPixelSize()*src.getWidth());
    113 
    114 	int				width		= src.getWidth();
    115 	int				height		= src.getHeight();
    116 	TransferFormat	format		= getTransferFormat(src.getFormat());
    117 
    118 	gl.pixelStorei(GL_UNPACK_ALIGNMENT, getTransferAlignment(src.getFormat()));
    119 	gl.texSubImage2D(target, level, x, y, width, height, format.format, format.dataType, src.getDataPtr());
    120 }
    121 
    122 /*--------------------------------------------------------------------*//*!
    123  * \brief Upload pixels from pixel buffer access.
    124  * \note Stride must be default stride for format.
    125  *//*--------------------------------------------------------------------*/
    126 void texSubImage3D (const RenderContext& context, deUint32 target, int level, int x, int y, int z, const tcu::ConstPixelBufferAccess& src)
    127 {
    128 	const glw::Functions& gl = context.getFunctions();
    129 
    130 	TCU_CHECK_INTERNAL(src.getRowPitch() == src.getFormat().getPixelSize()*src.getWidth());
    131 	TCU_CHECK_INTERNAL(src.getSlicePitch() == src.getRowPitch()*src.getHeight());
    132 
    133 	int				width		= src.getWidth();
    134 	int				height		= src.getHeight();
    135 	int				depth		= src.getDepth();
    136 	TransferFormat	format		= getTransferFormat(src.getFormat());
    137 
    138 	gl.pixelStorei(GL_UNPACK_ALIGNMENT, getTransferAlignment(src.getFormat()));
    139 	gl.texSubImage3D(target, level, x, y, z, width, height, depth, format.format, format.dataType, src.getDataPtr());
    140 }
    141 
    142 } // glu
    143