455 lines
13 KiB
C++
455 lines
13 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <linux/fb.h>
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#include <linux/kd.h>
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#include <png.h>
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#include <pixelflinger/pixelflinger.h>
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#ifdef TW_INCLUDE_JPEG
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extern "C" {
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#include "jpeglib.h"
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}
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#endif
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#include "minuitwrp/minui.h"
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#define SURFACE_DATA_ALIGNMENT 8
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static GGLSurface* malloc_surface(size_t data_size) {
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size_t size = sizeof(GGLSurface) + data_size + SURFACE_DATA_ALIGNMENT;
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unsigned char* temp = reinterpret_cast<unsigned char*>(malloc(size));
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if (temp == NULL) return NULL;
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GGLSurface* surface = reinterpret_cast<GGLSurface*>(temp);
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surface->data = temp + sizeof(GGLSurface) +
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(SURFACE_DATA_ALIGNMENT - (sizeof(GGLSurface) % SURFACE_DATA_ALIGNMENT));
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return surface;
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}
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static int open_png(const char* name, png_structp* png_ptr, png_infop* info_ptr,
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png_uint_32* width, png_uint_32* height, png_byte* channels, FILE** fpp) {
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char resPath[256];
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unsigned char header[8];
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int result = 0;
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int color_type, bit_depth;
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size_t bytesRead;
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snprintf(resPath, sizeof(resPath)-1, TWRES "images/%s.png", name);
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resPath[sizeof(resPath)-1] = '\0';
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FILE* fp = fopen(resPath, "rb");
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if (fp == NULL) {
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fp = fopen(name, "rb");
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if (fp == NULL) {
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result = -1;
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goto exit;
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}
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}
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bytesRead = fread(header, 1, sizeof(header), fp);
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if (bytesRead != sizeof(header)) {
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result = -2;
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goto exit;
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}
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if (png_sig_cmp(header, 0, sizeof(header))) {
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result = -3;
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goto exit;
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}
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*png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (!*png_ptr) {
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result = -4;
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goto exit;
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}
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*info_ptr = png_create_info_struct(*png_ptr);
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if (!*info_ptr) {
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result = -5;
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goto exit;
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}
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if (setjmp(png_jmpbuf(*png_ptr))) {
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result = -6;
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goto exit;
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}
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png_init_io(*png_ptr, fp);
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png_set_sig_bytes(*png_ptr, sizeof(header));
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png_read_info(*png_ptr, *info_ptr);
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png_get_IHDR(*png_ptr, *info_ptr, width, height, &bit_depth,
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&color_type, NULL, NULL, NULL);
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*channels = png_get_channels(*png_ptr, *info_ptr);
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if (bit_depth == 8 && *channels == 3 && color_type == PNG_COLOR_TYPE_RGB) {
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// 8-bit RGB images: great, nothing to do.
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} else if (bit_depth <= 8 && *channels == 1 && color_type == PNG_COLOR_TYPE_GRAY) {
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// 1-, 2-, 4-, or 8-bit gray images: expand to 8-bit gray.
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png_set_expand_gray_1_2_4_to_8(*png_ptr);
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} else if (bit_depth <= 8 && *channels == 1 && color_type == PNG_COLOR_TYPE_PALETTE) {
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// paletted images: expand to 8-bit RGB. Note that we DON'T
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// currently expand the tRNS chunk (if any) to an alpha
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// channel, because minui doesn't support alpha channels in
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// general.
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png_set_palette_to_rgb(*png_ptr);
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*channels = 3;
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} else if (color_type == PNG_COLOR_TYPE_PALETTE) {
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png_set_palette_to_rgb(*png_ptr);
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}
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*fpp = fp;
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return result;
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exit:
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if (result < 0) {
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png_destroy_read_struct(png_ptr, info_ptr, NULL);
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}
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if (fp != NULL) {
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fclose(fp);
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}
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return result;
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}
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// "display" surfaces are transformed into the framebuffer's required
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// pixel format (currently only RGBX is supported) at load time, so
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// gr_blit() can be nothing more than a memcpy() for each row. The
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// next two functions are the only ones that know anything about the
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// framebuffer pixel format; they need to be modified if the
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// framebuffer format changes (but nothing else should).
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// Allocate and return a GRSurface* sufficient for storing an image of
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// the indicated size in the framebuffer pixel format.
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static GGLSurface* init_display_surface(png_uint_32 width, png_uint_32 height) {
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GGLSurface* surface = malloc_surface(width * height * 4);
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if (surface == NULL) return NULL;
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surface->version = sizeof(GGLSurface);
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surface->width = width;
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surface->height = height;
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surface->stride = width;
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return surface;
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}
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// Copy 'input_row' to 'output_row', transforming it to the
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// framebuffer pixel format. The input format depends on the value of
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// 'channels':
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//
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// 1 - input is 8-bit grayscale
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// 3 - input is 24-bit RGB
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// 4 - input is 32-bit RGBA/RGBX
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//
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// 'width' is the number of pixels in the row.
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static void transform_rgb_to_draw(unsigned char* input_row,
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unsigned char* output_row,
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int channels, int width) {
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int x;
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unsigned char* ip = input_row;
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unsigned char* op = output_row;
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switch (channels) {
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case 1:
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// expand gray level to RGBX
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for (x = 0; x < width; ++x) {
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*op++ = *ip;
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*op++ = *ip;
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*op++ = *ip;
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*op++ = 0xff;
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ip++;
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}
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break;
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case 3:
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// expand RGBA to RGBX
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for (x = 0; x < width; ++x) {
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*op++ = *ip++;
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*op++ = *ip++;
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*op++ = *ip++;
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*op++ = 0xff;
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}
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break;
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case 4:
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// copy RGBA to RGBX
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memcpy(output_row, input_row, width*4);
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break;
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}
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}
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int res_create_surface_png(const char* name, gr_surface* pSurface) {
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GGLSurface* surface = NULL;
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int result = 0;
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png_structp png_ptr = NULL;
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png_infop info_ptr = NULL;
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png_uint_32 width, height;
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png_byte channels;
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FILE* fp;
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unsigned char* p_row;
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unsigned int y;
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*pSurface = NULL;
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result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels, &fp);
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if (result < 0) return result;
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surface = init_display_surface(width, height);
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if (surface == NULL) {
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result = -8;
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goto exit;
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}
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#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
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png_set_bgr(png_ptr);
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#endif
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p_row = reinterpret_cast<unsigned char*>(malloc(width * 4));
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if (p_row == NULL) {
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result = -9;
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goto exit;
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}
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for (y = 0; y < height; ++y) {
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png_read_row(png_ptr, p_row, NULL);
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transform_rgb_to_draw(p_row, surface->data + y * width * 4, channels, width);
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}
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free(p_row);
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if (channels == 3)
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surface->format = GGL_PIXEL_FORMAT_RGBX_8888;
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else
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surface->format = GGL_PIXEL_FORMAT_RGBA_8888;
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*pSurface = (gr_surface) surface;
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exit:
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fclose(fp);
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png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
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if (result < 0 && surface != NULL) free(surface);
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return result;
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}
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#ifdef TW_INCLUDE_JPEG
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int res_create_surface_jpg(const char* name, gr_surface* pSurface) {
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GGLSurface* surface = NULL;
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int result = 0, y;
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struct jpeg_decompress_struct cinfo;
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struct jpeg_error_mgr jerr;
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unsigned char* pData;
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size_t width, height, stride, pixelSize;
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FILE* fp = fopen(name, "rb");
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if (fp == NULL) {
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char resPath[256];
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snprintf(resPath, sizeof(resPath)-1, TWRES "images/%s", name);
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resPath[sizeof(resPath)-1] = '\0';
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fp = fopen(resPath, "rb");
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if (fp == NULL) {
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result = -1;
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goto exit;
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}
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}
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cinfo.err = jpeg_std_error(&jerr);
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jpeg_create_decompress(&cinfo);
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/* Specify data source for decompression */
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jpeg_stdio_src(&cinfo, fp);
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/* Read file header, set default decompression parameters */
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if (jpeg_read_header(&cinfo, TRUE) != JPEG_HEADER_OK)
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goto exit;
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/* Start decompressor */
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(void) jpeg_start_decompress(&cinfo);
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width = cinfo.image_width;
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height = cinfo.image_height;
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stride = 4 * width;
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pixelSize = stride * height;
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surface = reinterpret_cast<GGLSurface*>(malloc(sizeof(GGLSurface) + pixelSize));
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//p_row = reinterpret_cast<unsigned char*>(malloc(width * 4));
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if (surface == NULL) {
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result = -8;
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goto exit;
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}
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pData = (unsigned char*) (surface + 1);
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surface->version = sizeof(GGLSurface);
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surface->width = width;
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surface->height = height;
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surface->stride = width; /* Yes, pixels, not bytes */
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surface->data = pData;
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surface->format = GGL_PIXEL_FORMAT_RGBX_8888;
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for (y = 0; y < (int) height; ++y) {
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unsigned char* pRow = pData + y * stride;
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jpeg_read_scanlines(&cinfo, &pRow, 1);
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int x;
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for(x = width - 1; x >= 0; x--) {
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int sx = x * 3;
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int dx = x * 4;
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unsigned char r = pRow[sx];
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unsigned char g = pRow[sx + 1];
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unsigned char b = pRow[sx + 2];
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unsigned char a = 0xff;
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#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
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pRow[dx ] = b; // r
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pRow[dx + 1] = g; // g
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pRow[dx + 2] = r; // b
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pRow[dx + 3] = a;
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#else
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pRow[dx ] = r; // r
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pRow[dx + 1] = g; // g
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pRow[dx + 2] = b; // b
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pRow[dx + 3] = a;
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#endif
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}
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}
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*pSurface = (gr_surface) surface;
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exit:
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if (fp != NULL)
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{
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if (surface)
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{
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(void) jpeg_finish_decompress(&cinfo);
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if (result < 0)
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{
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free(surface);
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}
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}
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jpeg_destroy_decompress(&cinfo);
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fclose(fp);
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}
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return result;
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}
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#endif
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int res_create_surface(const char* name, gr_surface* pSurface) {
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int ret;
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if (!name) return -1;
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#ifdef TW_INCLUDE_JPEG
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if (strlen(name) > 4 && strcmp(name + strlen(name) - 4, ".jpg") == 0)
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return res_create_surface_jpg(name,pSurface);
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#endif
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ret = res_create_surface_png(name, pSurface);
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#ifdef TW_INCLUDE_JPEG
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if (ret < 0)
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ret = res_create_surface_jpg(name,pSurface);
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#endif
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return ret;
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}
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void res_free_surface(gr_surface surface) {
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GGLSurface* pSurface = (GGLSurface*) surface;
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if (pSurface) {
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free(pSurface);
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}
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}
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// Scale image function
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int res_scale_surface(gr_surface source, gr_surface* destination, float scale_w, float scale_h) {
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GGLContext *gl = NULL;
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GGLSurface* sc_mem_surface = NULL;
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*destination = NULL;
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GGLSurface *surface = (GGLSurface*)source;
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int w = gr_get_width(source), h = gr_get_height(source);
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int sx = 0, sy = 0, dx = 0, dy = 0;
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float dw = (float)w * scale_w;
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float dh = (float)h * scale_h;
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// Create a new surface that is the appropriate size
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sc_mem_surface = init_display_surface((int)dw, (int)dh);
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if (!sc_mem_surface) {
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printf("gr_scale_surface failed to init_display_surface\n");
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return -1;
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}
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sc_mem_surface->format = surface->format;
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// Initialize the context
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gglInit(&gl);
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gl->colorBuffer(gl, sc_mem_surface);
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gl->activeTexture(gl, 0);
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// Enable or disable blending based on source surface format
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if (surface->format == GGL_PIXEL_FORMAT_RGBX_8888) {
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gl->disable(gl, GGL_BLEND);
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} else {
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gl->enable(gl, GGL_BLEND);
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gl->blendFunc(gl, GGL_ONE, GGL_ZERO);
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}
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// Bind our source surface to the context
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gl->bindTexture(gl, surface);
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// Deal with the scaling
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gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_MIN_FILTER, GGL_LINEAR);
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gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_MAG_FILTER, GGL_LINEAR);
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gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_WRAP_S, GGL_CLAMP);
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gl->texParameteri(gl, GGL_TEXTURE_2D, GGL_TEXTURE_WRAP_T, GGL_CLAMP);
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gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
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gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_AUTOMATIC);
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gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_AUTOMATIC);
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gl->enable(gl, GGL_TEXTURE_2D);
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int32_t grad[8];
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memset(grad, 0, sizeof(grad));
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// s, dsdx, dsdy, scale, t, dtdx, dtdy, tscale <- this is wrong!
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// This api uses block floating-point for S and T texture coordinates.
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// All values are given in 16.16, scaled by 'scale'. In other words,
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// set scale to 0, for 16.16 values.
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// s, dsdx, dsdy, t, dtdx, dtdy, sscale, tscale
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float dsdx = (float)w / dw;
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float dtdy = (float)h / dh;
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grad[0] = ((float)sx - (dsdx * dx)) * 65536;
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grad[1] = dsdx * 65536;
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grad[3] = ((float)sy - (dtdy * dy)) * 65536;
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grad[5] = dtdy * 65536;
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// printf("blit: w=%d h=%d dx=%d dy=%d dw=%f dh=%f dsdx=%f dtdy=%f s0=%x dsdx=%x t0=%x dtdy=%x\n",
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// w, h, dx, dy, dw, dh, dsdx, dtdy, grad[0], grad[1], grad[3], grad[5]);
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gl->texCoordGradScale8xv(gl, 0 /*tmu*/, grad);
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// draw / scale the source surface to our target context
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gl->recti(gl, dx, dy, dx + dw, dy + dh);
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gglUninit(gl);
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gl = NULL;
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// put the scaled surface in our destination
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*destination = (gr_surface*) sc_mem_surface;
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// free memory used in the source
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res_free_surface(source);
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source = NULL;
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return 0;
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}
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