[repo.or.cz] gfxprim.git branch generate updated: af5fd7582e11df218ea97fa3d5299a86e0a07194 - Gfxprim

21 Sep 2011

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http://repo.or.cz/w/gfxprim.git/commit/af5fd7582e11df218ea97fa3d5299a86e0a07...
commit af5fd7582e11df218ea97fa3d5299a86e0a07194
Author: Cyril Hrubis metan@ucw.cz
Date:   Wed Sep 21 12:44:06 2011 +0200
Working on PPM loader (binary works).

diff --git a/include/loaders/GP_Loaders.h b/include/loaders/GP_Loaders.h
index e7ac305..e03f15d 100644
--- a/include/loaders/GP_Loaders.h
+++ b/include/loaders/GP_Loaders.h
@@ -34,7 +34,6 @@
#include "GP_PBM.h"
 #include "GP_PGM.h"
-
-struct GP_Context *GP_Load(const char *src_path);
+#include "GP_PPM.h"
#endif /* GP_LOADERS_H */
diff --git a/include/loaders/GP_Loaders.h b/include/loaders/GP_PPM.h
similarity index 78%
copy from include/loaders/GP_Loaders.h
copy to include/loaders/GP_PPM.h
index e7ac305..78ba9f7 100644
--- a/include/loaders/GP_Loaders.h
+++ b/include/loaders/GP_PPM.h
@@ -16,25 +16,17 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
  * Boston, MA  02110-1301  USA                                               *
  *                                                                           *
- * Copyright (C) 2009-2010 Jiri "BlueBear" Dluhos                            *
- *                         jiri.bluebear.dluhos@gmail.com                  *
- *                                                                           *
  * Copyright (C) 2009-2011 Cyril Hrubis metan@ucw.cz                       *
  *                                                                           *
  *****************************************************************************/
- /*
-
-   Core include file for loaders API.
-
-  */
+#ifndef GP_PPM_H
+#define GP_PPM_H
-#ifndef GP_LOADERS_H
-#define GP_LOADERS_H
+#include "core/GP_Context.h"
-#include "GP_PBM.h"
-#include "GP_PGM.h"
+GP_RetCode GP_LoadPPM(const char *src_path, GP_Context **res);
-struct GP_Context *GP_Load(const char *src_path);
+GP_RetCode GP_SavePPM(const char *res_path, GP_Context *src);
-#endif /* GP_LOADERS_H */
+#endif /* GP_PPM_H */
diff --git a/include/loaders/GP_Loaders.h b/libs/loaders/GP_PPM.c
similarity index 54%
copy from include/loaders/GP_Loaders.h
copy to libs/loaders/GP_PPM.c
index e7ac305..1eec6e9 100644
--- a/include/loaders/GP_Loaders.h
+++ b/libs/loaders/GP_PPM.c
@@ -16,25 +16,93 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
  * Boston, MA  02110-1301  USA                                               *
  *                                                                           *
- * Copyright (C) 2009-2010 Jiri "BlueBear" Dluhos                            *
- *                         jiri.bluebear.dluhos@gmail.com                  *
- *                                                                           *
  * Copyright (C) 2009-2011 Cyril Hrubis metan@ucw.cz                       *
  *                                                                           *
  *****************************************************************************/
- /*
+/*
+
+  PPM portable bitmap loader/saver.
+  
+ */
+
+#include <stdint.h>
+
+#include <GP_Debug.h>
+#include <GP_Context.h>
+#include <GP_Pixel.h>
+#include <GP_GetPutPixel.h>
+
+#include "GP_PXMCommon.h"
+
+int load_binary_ppm(FILE *f, uint32_t w, uint32_t h, uint32_t depth,
+                    GP_Context *res)
+{
+	uint32_t x, y;
+	int r, g, b;
+
+	for (x = 0; x < w; x++)
+		for (y = 0; y < h; y++) {
+			r = fgetc(f);
+			g = fgetc(f);
+			b = fgetc(f);
+		
+			if (r == EOF || g == EOF || b == EOF) {
+				GP_DEBUG(1, "Unexpected end of PBM file");
+				return 1;
+			}
+			
+			//TODO depth
+			GP_Pixel pix = GP_Pixel_CREATE_RGB888(r, g, b);
+			GP_PutPixel_Raw_24BPP(res, x, y, pix);
+		}
+
+	return 0;
+}
+
+GP_RetCode GP_LoadPPM(const char *src_path, GP_Context **res)
+{
+	uint32_t w, h, depth;
+	char fmt;
+	FILE *f;
+
+	f = GP_OpenPNM(src_path, &fmt, &w, &h, &depth);
+
+	if (f == NULL)
+		return GP_EBADFILE;
-   Core include file for loaders API.
+	if (fmt != '3' && fmt != '6') {
+		GP_DEBUG(1, "Asked to load PPM but header is 'P%c'", fmt);
+		goto err1;
+	}
-  */
+	*res = GP_ContextAlloc(w, h, GP_PIXEL_RGB888);
-#ifndef GP_LOADERS_H
-#define GP_LOADERS_H
+	if (res == NULL)
+		goto err1;
-#include "GP_PBM.h"
-#include "GP_PGM.h"
+	switch (fmt) {
+	case '3':
+		//TODO
+		fclose(f);
+		free(res);
+		return GP_ENOIMPL;
+	case '6':
+		if (load_binary_ppm(f, w, h, depth, *res))
+			goto err2;
+	break;
+	}
-struct GP_Context *GP_Load(const char *src_path);
+	fclose(f);
+	return GP_ESUCCESS;
+err2:
+	free(*res);
+err1:
+	fclose(f);
+	return GP_EBADFILE;
+}
-#endif /* GP_LOADERS_H */
+GP_RetCode GP_SavePPM(const char *res_path, GP_Context *src)
+{
+	return GP_ENOIMPL;
+}
diff --git a/libs/loaders/GP_PXMCommon.c b/libs/loaders/GP_PXMCommon.c
index 62ee36b..9b250bd 100644
--- a/libs/loaders/GP_PXMCommon.c
+++ b/libs/loaders/GP_PXMCommon.c
@@ -23,10 +23,15 @@
  *                                                                           *
  *****************************************************************************/
-#include <stdio.h>
 #include <stdint.h>
 #include <inttypes.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+
+#include <GP_Debug.h>
+
 #include "GP_PXMCommon.h"
static int read_comment(FILE *f)
@@ -381,3 +386,127 @@ GP_RetCode GP_PXMSave8bpp(FILE *f, GP_Context *context)
return GP_ESUCCESS;
 }
+
+static void try_read_comments(FILE *f)
+{
+	char c1, c2;
+
+	while (isspace(c1 = fgetc(f)));
+	
+	ungetc(c1, f);
+
+	while ((c1 = fgetc(f)) == '#') {
+		do {
+			c2 = fgetc(f);
+		} while (c2 != 'n' && c2 != EOF);
+	}
+
+	ungetc(c1, f);
+}
+
+/*
+
+  PNM portable bitmap header loader.
+
+  Format:
+  
+  a magick number value of 'P' and one of
+   '1' - PBM 2bpp gray ASCII
+   '2' - PGM gray      ASCII
+   '3' - PPM rgb888    ASCII
+   '4' - PBM 2bpp gray BINARY
+   '5' - PGM gray      BINARY
+   '6' - PPM rgb888    BINARY
+  whitespace (blanks, TABs, CRs, LFs).
+  ascii width
+  whitespace
+  ascii height
+  whitespace
+  maximal value (interval is 0 ... max) (not applicable for PBM)
+  width * height ascii or binary values 
+  
+  lines starting with '#' are comments to the end of line
+  
+ */
+
+static char *pnm_names[] = {
+	"ASCII encoded PBM",
+	"ASCII encoded PGM",
+	"ASCII encoded PPM",
+	"BINARY encoded PBM",
+	"BINARY encoded PGM",
+	"BINARY encoded PPM",
+};
+
+FILE *GP_OpenPNM(const char *src_path, char *fmt, uint32_t *w, uint32_t *h,
+                 uint32_t *depth)
+{
+	FILE *f = fopen(src_path, "r");
+	int ch;
+
+	if (f == NULL) {
+		GP_DEBUG(1, "Failed to open file '%s': %s",
+		         src_path, strerror(errno));
+		return NULL;
+	}
+
+	ch = fgetc(f);
+
+	if (ch != 'P') {
+		GP_DEBUG(1, "Invalid PNM header start '%c' (0x%2x) expecting 'P'",
+		         isprint(ch) ? ch : ' ',  ch);
+		goto err1;
+	}
+
+	ch = fgetc(f);
+
+	switch (ch) {
+	case '4':
+	case '1':
+		*depth = 1;
+	break;
+	case '2':
+	case '3':
+	case '5':
+	case '6':
+	break;
+	default:
+		GP_DEBUG(1, "Invalid PNM format 'P%c' (0x%2x)",
+		         isprint(ch) ? ch : ' ',  ch);
+		goto err1;
+	}
+	
+	*fmt = ch;
+
+	try_read_comments(f);
+
+	if (fscanf(f, "%"PRIu32"n", w) < 1) {
+		GP_DEBUG(1, "Failed to read PNM header width");
+		goto err1;
+	}
+	
+	try_read_comments(f);
+	
+	if (fscanf(f, "%"PRIu32"n", h) < 1) {
+		GP_DEBUG(1, "Failed to read PNM header height");
+		goto err1;
+	}
+
+	GP_DEBUG(2, "Have %s size %"PRIu32"x%"PRIu32,
+	         pnm_names[*fmt - '1'], *w, *h);
+
+	if (*fmt == '1' || *fmt == '3')
+		return f;
+
+	try_read_comments(f);
+	
+	if (fscanf(f, "%"PRIu32"n", depth) < 1) {
+		GP_DEBUG(1, "Failed to read PNM header depth");
+		goto err1;
+	}
+
+	return f;
+err1:
+	fclose(f);
+	return NULL;
+}
diff --git a/libs/loaders/GP_PXMCommon.h b/libs/loaders/GP_PXMCommon.h
index 0c52e71..0c231e2 100644
--- a/libs/loaders/GP_PXMCommon.h
+++ b/libs/loaders/GP_PXMCommon.h
@@ -53,4 +53,11 @@ GP_RetCode GP_PXMLoad2bpp(FILE *f, GP_Context *context);
 GP_RetCode GP_PXMLoad4bpp(FILE *f, GP_Context *context);
 GP_RetCode GP_PXMLoad8bpp(FILE *f, GP_Context *context);
+/*
+ * Loads image header, returns pointer to FILE* on success, fills image
+ * metadata into arguments.
+ */
+FILE *GP_OpenPNM(const char *src_path, char *fmt, uint32_t *w, uint32_t *h,
+                 uint32_t *depth);
+
 #endif /* GP_PXM_COMMON_H */
diff --git a/tests/SDL/ball.ppm b/tests/SDL/ball.ppm
new file mode 100644
index 0000000..1ced238
Binary files /dev/null and b/tests/SDL/ball.ppm differ
diff --git a/tests/SDL/blittest.c b/tests/SDL/blittest.c
index 2e34564..1f77533 100644
--- a/tests/SDL/blittest.c
+++ b/tests/SDL/blittest.c
@@ -164,7 +164,7 @@ int main(int argc, char *argv[])
GP_RetCode ret;
-	if ((ret = GP_LoadPGM("ball.pgm", &bitmap_raw))) {
+	if ((ret = GP_LoadPPM("ball.ppm", &bitmap_raw))) {
    	fprintf(stderr, "Failed to load bitmap: %sn", GP_RetCodeName(ret));
    	return 1;
    }
-----------------------------------------------------------------------
Summary of changes:
 include/loaders/GP_Loaders.h                     |    3 +-
 libs/core/GP_Debug.c => include/loaders/GP_PPM.h |   17 +--
 libs/loaders/{GP_PBM.c => GP_PPM.c}              |  112 +++++++++----------
 libs/loaders/GP_PXMCommon.c                      |  131 +++++++++++++++++++++-
 libs/loaders/GP_PXMCommon.h                      |    7 +
 tests/SDL/ball.ppm                               |  Bin 0 -> 30054 bytes
 tests/SDL/blittest.c                             |    2 +-
 7 files changed, 201 insertions(+), 71 deletions(-)
 copy libs/core/GP_Debug.c => include/loaders/GP_PPM.h (88%)
 copy libs/loaders/{GP_PBM.c => GP_PPM.c} (56%)
 create mode 100644 tests/SDL/ball.ppm
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