upload android base code part6
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#include "GLESTextureUtils.h"
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#include "glUtils.h"
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#include <cutils/log.h>
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namespace GLESTextureUtils {
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// Based on computations in
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// https://swiftshader.googlesource.com/SwiftShader/+/master/src/OpenGL/common/Image.cpp
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// such as Image::loadImageData,
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// ComputePitch/ComputePackingOffset
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#define HIGHEST_MULTIPLE_OF(align, x) \
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(( ( x ) + ( align ) - 1) & ~( ( align ) - 1)) \
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static int computePixelSize(GLenum format, GLenum type) {
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#define FORMAT_ERROR(format, type) \
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ALOGE("%s:%d unknown format/type 0x%x 0x%x", __FUNCTION__, __LINE__, format, type) \
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switch(type) {
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case GL_BYTE:
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switch(format) {
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case GL_R8:
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case GL_R8I:
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case GL_R8_SNORM:
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case GL_RED: return sizeof(char);
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case GL_RED_INTEGER: return sizeof(char);
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case GL_RG8:
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case GL_RG8I:
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case GL_RG8_SNORM:
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case GL_RG: return sizeof(char) * 2;
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case GL_RG_INTEGER: return sizeof(char) * 2;
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case GL_RGB8:
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case GL_RGB8I:
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case GL_RGB8_SNORM:
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case GL_RGB: return sizeof(char) * 3;
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case GL_RGB_INTEGER: return sizeof(char) * 3;
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case GL_RGBA8:
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case GL_RGBA8I:
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case GL_RGBA8_SNORM:
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case GL_RGBA: return sizeof(char) * 4;
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case GL_RGBA_INTEGER: return sizeof(char) * 4;
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default: FORMAT_ERROR(format, type);
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}
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break;
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case GL_UNSIGNED_BYTE:
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switch(format) {
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case GL_R8:
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case GL_R8UI:
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case GL_RED: return sizeof(unsigned char);
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case GL_RED_INTEGER: return sizeof(unsigned char);
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case GL_ALPHA8_EXT:
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case GL_ALPHA: return sizeof(unsigned char);
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case GL_LUMINANCE8_EXT:
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case GL_LUMINANCE: return sizeof(unsigned char);
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case GL_LUMINANCE8_ALPHA8_EXT:
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case GL_LUMINANCE_ALPHA: return sizeof(unsigned char) * 2;
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case GL_RG8:
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case GL_RG8UI:
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case GL_RG: return sizeof(unsigned char) * 2;
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case GL_RG_INTEGER: return sizeof(unsigned char) * 2;
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case GL_RGB8:
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case GL_RGB8UI:
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case GL_SRGB8:
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case GL_RGB: return sizeof(unsigned char) * 3;
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case GL_RGB_INTEGER: return sizeof(unsigned char) * 3;
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case GL_RGBA8:
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case GL_RGBA8UI:
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case GL_SRGB8_ALPHA8:
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case GL_RGBA: return sizeof(unsigned char) * 4;
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case GL_RGBA_INTEGER: return sizeof(unsigned char) * 4;
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case GL_BGRA_EXT:
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case GL_BGRA8_EXT: return sizeof(unsigned char)* 4;
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default: FORMAT_ERROR(format, type);
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}
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break;
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case GL_SHORT:
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switch(format) {
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case GL_R16I:
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case GL_RED_INTEGER: return sizeof(short);
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case GL_RG16I:
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case GL_RG_INTEGER: return sizeof(short) * 2;
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case GL_RGB16I:
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case GL_RGB_INTEGER: return sizeof(short) * 3;
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case GL_RGBA16I:
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case GL_RGBA_INTEGER: return sizeof(short) * 4;
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default: FORMAT_ERROR(format, type);
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}
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break;
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case GL_UNSIGNED_SHORT:
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switch(format) {
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case GL_DEPTH_COMPONENT16:
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case GL_DEPTH_COMPONENT: return sizeof(unsigned short);
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case GL_R16UI:
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case GL_RED_INTEGER: return sizeof(unsigned short);
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case GL_RG16UI:
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case GL_RG_INTEGER: return sizeof(unsigned short) * 2;
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case GL_RGB16UI:
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case GL_RGB_INTEGER: return sizeof(unsigned short) * 3;
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case GL_RGBA16UI:
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case GL_RGBA_INTEGER: return sizeof(unsigned short) * 4;
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default: FORMAT_ERROR(format, type);
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}
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break;
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case GL_INT:
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switch(format) {
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case GL_R32I:
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case GL_RED_INTEGER: return sizeof(int);
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case GL_RG32I:
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case GL_RG_INTEGER: return sizeof(int) * 2;
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case GL_RGB32I:
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case GL_RGB_INTEGER: return sizeof(int) * 3;
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case GL_RGBA32I:
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case GL_RGBA_INTEGER: return sizeof(int) * 4;
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default: FORMAT_ERROR(format, type);
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}
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break;
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case GL_UNSIGNED_INT:
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switch(format) {
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case GL_DEPTH_COMPONENT16:
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case GL_DEPTH_COMPONENT24:
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case GL_DEPTH_COMPONENT32_OES:
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case GL_DEPTH_COMPONENT: return sizeof(unsigned int);
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case GL_R32UI:
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case GL_RED_INTEGER: return sizeof(unsigned int);
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case GL_RG32UI:
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case GL_RG_INTEGER: return sizeof(unsigned int) * 2;
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case GL_RGB32UI:
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case GL_RGB_INTEGER: return sizeof(unsigned int) * 3;
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case GL_RGBA32UI:
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case GL_RGBA_INTEGER: return sizeof(unsigned int) * 4;
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default: FORMAT_ERROR(format, type);
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}
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break;
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case GL_UNSIGNED_SHORT_4_4_4_4:
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case GL_UNSIGNED_SHORT_5_5_5_1:
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case GL_UNSIGNED_SHORT_5_6_5:
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case GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT:
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case GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT:
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return sizeof(unsigned short);
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case GL_UNSIGNED_INT_10F_11F_11F_REV:
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case GL_UNSIGNED_INT_5_9_9_9_REV:
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case GL_UNSIGNED_INT_2_10_10_10_REV:
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case GL_UNSIGNED_INT_24_8_OES:
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return sizeof(unsigned int);
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case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
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return sizeof(float) + sizeof(unsigned int);
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case GL_FLOAT:
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switch(format) {
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case GL_DEPTH_COMPONENT32F:
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case GL_DEPTH_COMPONENT: return sizeof(float);
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case GL_ALPHA32F_EXT:
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case GL_ALPHA: return sizeof(float);
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case GL_LUMINANCE32F_EXT:
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case GL_LUMINANCE: return sizeof(float);
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case GL_LUMINANCE_ALPHA32F_EXT:
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case GL_LUMINANCE_ALPHA: return sizeof(float) * 2;
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case GL_RED: return sizeof(float);
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case GL_R32F: return sizeof(float);
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case GL_RG: return sizeof(float) * 2;
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case GL_RG32F: return sizeof(float) * 2;
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case GL_RGB: return sizeof(float) * 3;
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case GL_RGB32F: return sizeof(float) * 3;
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case GL_RGBA: return sizeof(float) * 4;
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case GL_RGBA32F: return sizeof(float) * 4;
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default: FORMAT_ERROR(format, type);
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}
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break;
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case GL_HALF_FLOAT:
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case GL_HALF_FLOAT_OES:
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switch(format) {
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case GL_ALPHA16F_EXT:
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case GL_ALPHA: return sizeof(unsigned short);
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case GL_LUMINANCE16F_EXT:
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case GL_LUMINANCE: return sizeof(unsigned short);
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case GL_LUMINANCE_ALPHA16F_EXT:
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case GL_LUMINANCE_ALPHA: return sizeof(unsigned short) * 2;
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case GL_RED: return sizeof(unsigned short);
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case GL_R16F: return sizeof(unsigned short);
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case GL_RG: return sizeof(unsigned short) * 2;
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case GL_RG16F: return sizeof(unsigned short) * 2;
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case GL_RGB: return sizeof(unsigned short) * 3;
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case GL_RGB16F: return sizeof(unsigned short) * 3;
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case GL_RGBA: return sizeof(unsigned short) * 4;
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case GL_RGBA16F: return sizeof(unsigned short) * 4;
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default: FORMAT_ERROR(format, type);
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}
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break;
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default: FORMAT_ERROR(format, type);
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}
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return 0;
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}
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static int computePitch(GLsizei inputWidth, GLenum format, GLenum type, int align) {
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GLsizei unaligned_width = computePixelSize(format, type) * inputWidth;
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return HIGHEST_MULTIPLE_OF(align, unaligned_width);
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}
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static int computePackingOffset(GLenum format, GLenum type, GLsizei width, GLsizei height, int align, int skipPixels, int skipRows, int skipImages) {
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GLsizei alignedPitch = computePitch(width, format, type, align);
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int packingOffsetRows =
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(skipImages * height + skipRows);
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return packingOffsetRows * alignedPitch + skipPixels * computePixelSize(format, type);
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}
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void computeTextureStartEnd(
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GLsizei width, GLsizei height, GLsizei depth,
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GLenum format, GLenum type,
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int unpackAlignment,
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int unpackRowLength,
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int unpackImageHeight,
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int unpackSkipPixels,
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int unpackSkipRows,
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int unpackSkipImages,
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int* start,
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int* end) {
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GLsizei inputWidth = (unpackRowLength == 0) ? width : unpackRowLength;
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GLsizei inputPitch = computePitch(inputWidth, format, type, unpackAlignment);
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GLsizei inputHeight = (unpackImageHeight == 0) ? height : unpackImageHeight;
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ALOGV("%s: input idim %d %d %d w p h %d %d %d:", __FUNCTION__, width, height, depth, inputWidth, inputPitch, inputHeight);
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int startVal = computePackingOffset(format, type, inputWidth, inputHeight, unpackAlignment, unpackSkipPixels, unpackSkipRows, unpackSkipImages);
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int endVal = startVal + inputPitch * inputHeight * depth;
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if (start) *start = startVal;
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if (end) *end = endVal;
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ALOGV("%s: start/end: %d %d", __FUNCTION__, *start, *end);
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}
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int computeTotalImageSize(
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GLsizei width, GLsizei height, GLsizei depth,
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GLenum format, GLenum type,
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int unpackAlignment,
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int unpackRowLength,
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int unpackImageHeight,
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int unpackSkipPixels,
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int unpackSkipRows,
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int unpackSkipImages) {
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int start, end;
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computeTextureStartEnd(
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width, height, depth,
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format, type,
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unpackAlignment,
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unpackRowLength,
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unpackImageHeight,
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unpackSkipPixels,
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unpackSkipRows,
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unpackSkipImages,
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&start,
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&end);
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return end;
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}
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int computeNeededBufferSize(
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GLsizei width, GLsizei height, GLsizei depth,
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GLenum format, GLenum type,
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int unpackAlignment,
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int unpackRowLength,
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int unpackImageHeight,
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int unpackSkipPixels,
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int unpackSkipRows,
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int unpackSkipImages) {
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int start, end;
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computeTextureStartEnd(
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width, height, depth,
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format, type,
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unpackAlignment,
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unpackRowLength,
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unpackImageHeight,
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unpackSkipPixels,
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unpackSkipRows,
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unpackSkipImages,
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&start,
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&end);
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return end - start;
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}
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} // namespace GLESTextureUtils
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