Update minuitwrp graphics in line with latest minui
Note: events.cpp is still old code renamed to cpp to make it
easier to call functions like gr_fb_width().
I had to modify AOSP fbdev code to provide a separate memory
surface for drawing to as drawing directly to the framebuffer
resulted in rendering taking about 5 times longer.
I also modified AOSP adf code to provide a separate memory surface
for drawing for the same performance reasons. The Nexus 9 supports
adf graphics.
Overlay graphics work on at least one device. Overlay provides a
separate memory buffer already so performance is good.
I do not have a drm device yet that I know of. I made some attempt
to update the drm code to determine the correct pixel format based
on the drm graphics format, but what is available in pixel flinger
and what is available in drm do not line up all that well. Reports
are that the Pixel C is using drm graphics, but performance is
slow, likely due to the use of a mmap instead of a memory buffyer.
Change-Id: Ibd45bccca6ac2cb826037aa9b2aa5065cf683eed
diff --git a/minuitwrp/graphics_utils.cpp b/minuitwrp/graphics_utils.cpp
new file mode 100644
index 0000000..6ce5704
--- /dev/null
+++ b/minuitwrp/graphics_utils.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <png.h>
+#include <pixelflinger/pixelflinger.h>
+#include <linux/fb.h>
+
+#include "minui.h"
+
+struct fb_var_screeninfo vi;
+extern GGLSurface gr_mem_surface;
+extern GRSurface* gr_draw;
+
+int gr_save_screenshot(const char *dest)
+{
+ uint32_t y, stride_bytes;
+ volatile int res = -1;
+ GGLContext *gl = NULL;
+ GGLSurface surface;
+ uint8_t * volatile img_data = NULL;
+ uint8_t *ptr;
+ FILE * volatile fp = NULL;
+ png_structp png_ptr = NULL;
+ png_infop info_ptr = NULL;
+
+ fp = fopen(dest, "wb");
+ if(!fp)
+ goto exit;
+
+ img_data = (uint8_t *)malloc(gr_mem_surface.stride * gr_mem_surface.height * gr_draw->pixel_bytes);
+ if (!img_data) {
+ printf("gr_save_screenshot failed to malloc img_data\n");
+ goto exit;
+ }
+ surface.version = sizeof(surface);
+ surface.width = gr_mem_surface.width;
+ surface.height = gr_mem_surface.height;
+ surface.stride = gr_mem_surface.stride;
+ surface.data = img_data;
+ surface.format = GGL_PIXEL_FORMAT_RGBA_8888;
+
+ gglInit(&gl);
+ gl->colorBuffer(gl, &surface);
+ gl->activeTexture(gl, 0);
+
+ if(gr_mem_surface.format == GGL_PIXEL_FORMAT_RGBX_8888)
+ gl->disable(gl, GGL_BLEND);
+
+ gl->bindTexture(gl, &gr_mem_surface);
+ gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE);
+ gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
+ gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE);
+ gl->enable(gl, GGL_TEXTURE_2D);
+ gl->texCoord2i(gl, 0, 0);
+ gl->recti(gl, 0, 0, gr_mem_surface.width, gr_mem_surface.height);
+
+ gglUninit(gl);
+ gl = NULL;
+
+ png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+ if (!png_ptr)
+ goto exit;
+
+ info_ptr = png_create_info_struct(png_ptr);
+ if (info_ptr == NULL)
+ goto exit;
+
+ if (setjmp(png_jmpbuf(png_ptr)))
+ goto exit;
+
+ png_init_io(png_ptr, fp);
+ png_set_IHDR(png_ptr, info_ptr, surface.width, surface.height,
+ 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
+ PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
+ png_write_info(png_ptr, info_ptr);
+
+ // To remove the alpha channel for PNG_COLOR_TYPE_RGB format,
+ png_set_filler(png_ptr, 0, PNG_FILLER_AFTER);
+
+ ptr = img_data;
+ stride_bytes = surface.stride*4;
+ for(y = 0; y < surface.height; ++y)
+ {
+ png_write_row(png_ptr, ptr);
+ ptr += stride_bytes;
+ }
+
+ png_write_end(png_ptr, NULL);
+
+ res = 0;
+exit:
+ if(info_ptr)
+ png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
+ if(png_ptr)
+ png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
+ if(gl)
+ gglUninit(gl);
+ if(img_data)
+ free(img_data);
+ if(fp)
+ fclose(fp);
+ return res;
+}