fix jmp issue in png image.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@149 bbd45198-f89e-11dd-88c7-29a3b14d5316

rtgui/common/dc.c

@@ -743,8 +743,6 @@ void rtgui_dc_draw_arc(struct rtgui_dc *dc, rt_int16_t x, rt_int16_t y, rt_int16
 {
 	rt_int16_t cx = 0;
 	rt_int16_t cy = r;
-	rt_int16_t ocx = (rt_int16_t) 0xffff;
-	rt_int16_t ocy = (rt_int16_t) 0xffff;
 	rt_int16_t df = 1 - r;
 	rt_int16_t d_e = 3;
 	rt_int16_t d_se = -2 * r + 5;

rtgui/common/image_hdc.c

@@ -0,0 +1,245 @@
+#include "libpng/png.h"
+#include <rtthread.h>
+#include <rtgui/image_hdc.h>
+#include <rtgui/rtgui_system.h>
+
+#define HDC_MAGIC_LEN       4
+
+struct rtgui_image_hdc
+{
+	rt_bool_t is_loaded;
+
+	struct rtgui_filerw* filerw;
+
+	/* hdc image information */
+    rt_uint32_t width, height;
+    rt_uint32_t pitch;
+
+	rt_uint8_t *pixels;
+};
+
+static rt_bool_t rtgui_image_hdc_check(struct rtgui_filerw* file);
+static rt_bool_t rtgui_image_hdc_load(struct rtgui_image* image, struct rtgui_filerw* file, rt_bool_t load);
+static void rtgui_image_hdc_unload(struct rtgui_image* image);
+static void rtgui_image_hdc_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* rect);
+
+struct rtgui_image_engine rtgui_image_hdc_engine =
+{
+	"hdc",
+	{ RT_NULL },
+	rtgui_image_hdc_check,
+	rtgui_image_hdc_load,
+	rtgui_image_hdc_unload,
+	rtgui_image_hdc_blit
+};
+
+static rt_bool_t rtgui_image_hdc_check(struct rtgui_filerw* file)
+{
+	int start;
+	rt_bool_t is_HDC;
+	rt_uint8_t magic[4];
+
+	if ( !file ) return 0;
+
+	start = rtgui_filerw_tell(file);
+
+	/* move to the begining of file */
+	rtgui_filerw_seek(file, 0, SEEK_SET);
+
+	is_HDC = RT_FALSE;
+	if ( rtgui_filerw_read(file, magic, 1, sizeof(magic)) == sizeof(magic) )
+	{
+		if ( magic[0] == 'H' &&
+				magic[1] == 'D' &&
+				magic[2] == 'C' &&
+				magic[3] == '\0' )
+		{
+			is_HDC = RT_TRUE;
+		}
+	}
+	rtgui_filerw_seek(file, start, SEEK_SET);
+
+	return(is_HDC);
+}
+
+static rt_bool_t rtgui_image_hdc_load(struct rtgui_image* image, struct rtgui_filerw* file, rt_bool_t load)
+{
+    rt_uint32_t header[5];
+    struct rtgui_image_hdc* hdc;
+
+    hdc = (struct rtgui_image_hdc*) rtgui_malloc(sizeof(struct rtgui_image_hdc));
+    if (hdc == RT_NULL) return RT_FALSE;
+
+    rtgui_filerw_read(file, (char*)&header, 1, sizeof(header));
+
+	/* set image information */
+	image->w = header[1]; image->h = header[2];
+	image->engine = &rtgui_image_hdc_engine;
+	image->data = png;
+
+	if (bit_depth == 16)
+		png_set_strip_16(png->png_ptr);
+	if (color_type == PNG_COLOR_TYPE_PALETTE)
+		png_set_expand(png->png_ptr);
+	if (bit_depth < 8)
+		png_set_expand(png->png_ptr);
+	if (png_get_valid(png->png_ptr, png->info_ptr, PNG_INFO_tRNS))
+		png_set_expand(png->png_ptr);
+	if (color_type == PNG_COLOR_TYPE_GRAY ||
+		color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+		png_set_gray_to_rgb(png->png_ptr);
+
+	/* Ignore background color */
+
+	/* set gamma conversion */
+	if (png_get_gAMA(png->png_ptr, png->info_ptr, &gamma))
+		png_set_gamma(png->png_ptr, (double)2.2, gamma);
+
+	png_read_update_info(png->png_ptr, png->info_ptr);
+
+	if (load == RT_TRUE)
+	{
+		/* load all pixels */
+		png->pixels = rtgui_malloc(image->w * image->h * sizeof(rtgui_color_t));
+		if (png->pixels == RT_NULL)
+		{
+            png_read_end(png->png_ptr, RT_NULL);
+
+            /* destroy png struct */
+            png_destroy_info_struct(png->png_ptr, &png->info_ptr);
+            png_destroy_read_struct(&png->png_ptr, RT_NULL, RT_NULL);
+
+            /* release data */
+            rtgui_free(png);
+            return RT_FALSE;
+		}
+
+		rtgui_image_hdc_process(png->png_ptr, png->info_ptr, png);
+	}
+	else
+	{
+		png->pixels = RT_NULL;
+	}
+
+	return RT_TRUE;
+}
+
+static void rtgui_image_hdc_unload(struct rtgui_image* image)
+{
+	struct rtgui_image_hdc* png;
+
+	if (image != RT_NULL)
+	{
+		png = (struct rtgui_image_hdc*) image->data;
+
+		png_read_end(png->png_ptr, RT_NULL);
+
+		/* destroy png struct */
+		png_destroy_info_struct(png->png_ptr, &png->info_ptr);
+		png_destroy_read_struct(&png->png_ptr, RT_NULL, RT_NULL);
+
+		if (png->pixels != RT_NULL) rtgui_free(png->pixels);
+
+		/* release data */
+		rtgui_free(png);
+	}
+}
+
+static void rtgui_image_hdc_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* rect)
+{
+	rt_uint16_t x, y, w, h;
+	rtgui_color_t* ptr;
+	rtgui_color_t foreground;
+	struct rtgui_image_hdc* png;
+
+	RT_ASSERT(image != RT_NULL && dc != RT_NULL && rect != RT_NULL);
+	RT_ASSERT(image->data != RT_NULL);
+
+	png = (struct rtgui_image_hdc*) image->data;
+
+    if (image->w < rtgui_rect_width(*rect)) w = image->w;
+    else w = rtgui_rect_width(*rect);
+    if (image->h < rtgui_rect_height(*rect)) h = image->h;
+    else h = rtgui_rect_height(*rect);
+
+	/* save foreground color */
+	foreground = rtgui_dc_get_color(dc);
+
+    if (png->pixels != RT_NULL)
+    {
+        ptr = (rtgui_color_t*)png->pixels;
+        /* draw each point within dc */
+        for (y = 0; y < h; y ++)
+        {
+            for (x = 0; x < w; x++)
+            {
+                /* not alpha */
+                if ((*ptr >> 24) != 255)
+                {
+                    rtgui_dc_set_color(dc, *ptr);
+                    rtgui_dc_draw_point(dc, x + rect->x1, y + rect->y1);
+                }
+
+                /* move to next color buffer */
+                ptr ++;
+            }
+        }
+    }
+    else
+    {
+        png_bytep row;
+        png_bytep data;
+
+        row = (png_bytep) rtgui_malloc (png_get_rowbytes(png->png_ptr, png->info_ptr));
+        if (row == RT_NULL) return ;
+
+        switch (png->info_ptr->color_type)
+        {
+        case PNG_COLOR_TYPE_RGBA:
+            for (y = 0; y < h; y++)
+            {
+                png_read_row(png->png_ptr, row, png_bytep_NULL);
+                for (x = 0; x < w; x++)
+                {
+                    data = &(row[x * 4]);
+                    if (data[3] != 0)
+                    {
+                        rtgui_dc_set_color(dc, RTGUI_ARGB((255 - data[3]), data[0], data[1], data[2]));
+                        rtgui_dc_draw_point(dc, x + rect->x1, y + rect->y1);
+                    }
+                }
+            }
+
+            break;
+
+        case PNG_COLOR_TYPE_PALETTE:
+            for (y = 0; y < h; y++)
+            {
+                png_read_row(png->png_ptr, row, png_bytep_NULL);
+                for (x = 0; x < w; x++)
+                {
+                    data = &(row[x]);
+
+                    rtgui_dc_set_color(dc, RTGUI_ARGB(0, png->info_ptr->palette[data[0]].red,
+                        png->info_ptr->palette[data[0]].green,
+                        png->info_ptr->palette[data[0]].blue));
+                    rtgui_dc_draw_point(dc, x + rect->x1, y + rect->y1);
+                }
+            }
+
+        default:
+            break;
+        };
+
+        rtgui_free(row);
+    }
+
+	/* restore foreground */
+	rtgui_dc_set_color(dc, foreground);
+}
+
+void rtgui_image_hdc_init()
+{
+	/* register png on image system */
+	rtgui_image_register_engine(&rtgui_image_hdc_engine);
+}

rtgui/common/image_png.c

@@ -16,7 +16,6 @@ struct rtgui_image_png
 	png_infop info_ptr;
 
 	rt_uint8_t *pixels;
-	rt_uint8_t *line_pixels;
 };
 
 static rt_bool_t rtgui_image_png_check(struct rtgui_filerw* file);
@@ -182,13 +181,23 @@ static rt_bool_t rtgui_image_png_load(struct rtgui_image* image, struct rtgui_fi
 	{
 		/* load all pixels */
 		png->pixels = rtgui_malloc(image->w * image->h * sizeof(rtgui_color_t));
-		png->line_pixels = RT_NULL;
+		if (png->pixels == RT_NULL)
+		{
+            png_read_end(png->png_ptr, RT_NULL);
+
+            /* destroy png struct */
+            png_destroy_info_struct(png->png_ptr, &png->info_ptr);
+            png_destroy_read_struct(&png->png_ptr, RT_NULL, RT_NULL);
+
+            /* release data */
+            rtgui_free(png);
+            return RT_FALSE;
+		}
 
 		rtgui_image_png_process(png->png_ptr, png->info_ptr, png);
 	}
 	else
 	{
-		png->line_pixels = rtgui_malloc(image->w * sizeof(rtgui_color_t));
 		png->pixels = RT_NULL;
 	}
 
@@ -203,14 +212,13 @@ static void rtgui_image_png_unload(struct rtgui_image* image)
 	{
 		png = (struct rtgui_image_png*) image->data;
 
-		png_read_end(png->png_ptr, NULL);
+		png_read_end(png->png_ptr, RT_NULL);
 
 		/* destroy png struct */
 		png_destroy_info_struct(png->png_ptr, &png->info_ptr);
-		png_destroy_read_struct(&png->png_ptr, NULL, NULL);
+		png_destroy_read_struct(&png->png_ptr, RT_NULL, RT_NULL);
 
 		if (png->pixels != RT_NULL) rtgui_free(png->pixels);
-		if (png->line_pixels != RT_NULL) rtgui_free(png->line_pixels);
 
 		/* release data */
 		rtgui_free(png);
@@ -219,7 +227,7 @@ static void rtgui_image_png_unload(struct rtgui_image* image)
 
 static void rtgui_image_png_blit(struct rtgui_image* image, struct rtgui_dc* dc, struct rtgui_rect* rect)
 {
-	rt_uint16_t x, y;
+	rt_uint16_t x, y, w, h;
 	rtgui_color_t* ptr;
 	rtgui_color_t foreground;
 	struct rtgui_image_png* png;
@@ -228,27 +236,83 @@ static void rtgui_image_png_blit(struct rtgui_image* image, struct rtgui_dc* dc,
 	RT_ASSERT(image->data != RT_NULL);
 
 	png = (struct rtgui_image_png*) image->data;
-	ptr = png->pixels;
+
+    if (image->w < rtgui_rect_width(*rect)) w = image->w;
+    else w = rtgui_rect_width(*rect);
+    if (image->h < rtgui_rect_height(*rect)) h = image->h;
+    else h = rtgui_rect_height(*rect);
 
 	/* save foreground color */
 	foreground = rtgui_dc_get_color(dc);
 
-	/* draw each point within dc */
+    if (png->pixels != RT_NULL)
-	for (y = 0; y < image->h; y ++)
+    {
-	{
+        ptr = (rtgui_color_t*)png->pixels;
-		for (x = 0; x < image->w; x++)
+        /* draw each point within dc */
-		{
+        for (y = 0; y < h; y ++)
-			/* not alpha */
+        {
-			if ((*ptr >> 24) != 255)
+            for (x = 0; x < w; x++)
-			{
+            {
-				rtgui_dc_set_color(dc, *ptr);
+                /* not alpha */
-				rtgui_dc_draw_point(dc, x + rect->x1, y + rect->y1);
+                if ((*ptr >> 24) != 255)
-			}
+                {
+                    rtgui_dc_set_color(dc, *ptr);
+                    rtgui_dc_draw_point(dc, x + rect->x1, y + rect->y1);
+                }
 
-			/* move to next color buffer */
+                /* move to next color buffer */
-			ptr ++;
+                ptr ++;
-		}
+            }
-	}
+        }
+    }
+    else
+    {
+        png_bytep row;
+        png_bytep data;
+
+        row = (png_bytep) rtgui_malloc (png_get_rowbytes(png->png_ptr, png->info_ptr));
+        if (row == RT_NULL) return ;
+
+        switch (png->info_ptr->color_type)
+        {
+        case PNG_COLOR_TYPE_RGBA:
+            for (y = 0; y < h; y++)
+            {
+                png_read_row(png->png_ptr, row, png_bytep_NULL);
+                for (x = 0; x < w; x++)
+                {
+                    data = &(row[x * 4]);
+                    if (data[3] != 0)
+                    {
+                        rtgui_dc_set_color(dc, RTGUI_ARGB((255 - data[3]), data[0], data[1], data[2]));
+                        rtgui_dc_draw_point(dc, x + rect->x1, y + rect->y1);
+                    }
+                }
+            }
+
+            break;
+
+        case PNG_COLOR_TYPE_PALETTE:
+            for (y = 0; y < h; y++)
+            {
+                png_read_row(png->png_ptr, row, png_bytep_NULL);
+                for (x = 0; x < w; x++)
+                {
+                    data = &(row[x]);
+
+                    rtgui_dc_set_color(dc, RTGUI_ARGB(0, png->info_ptr->palette[data[0]].red,
+                        png->info_ptr->palette[data[0]].green,
+                        png->info_ptr->palette[data[0]].blue));
+                    rtgui_dc_draw_point(dc, x + rect->x1, y + rect->y1);
+                }
+            }
+
+        default:
+            break;
+        };
+
+        rtgui_free(row);
+    }
 
 	/* restore foreground */
 	rtgui_dc_set_color(dc, foreground);
@@ -256,6 +320,6 @@ static void rtgui_image_png_blit(struct rtgui_image* image, struct rtgui_dc* dc,
 
 void rtgui_image_png_init()
 {
-	/* register jpeg on image system */
+	/* register png on image system */
 	rtgui_image_register_engine(&rtgui_image_png_engine);
 }

rtgui/common/libpng/pngconf.h

@@ -22,6 +22,7 @@
 #ifdef __RT_THREAD__
 #define PNG_NO_WRITE_SUPPORTED
 #define PNG_NO_STDIO
+#define PNG_NO_SETJMP_SUPPORTED
 #define PNG_MAX_MALLOC_64K
 #define malloc	rtgui_malloc
 #define free	rtgui_free