From 19f5996855973136650a5f09a615248cca08b573 Mon Sep 17 00:00:00 2001
From: Ry <ryanst755@gmail.com>
Date: Thu, 12 Oct 2023 16:17:08 -0700
Subject: [PATCH] kernel/res + base: Add `get_resource` and an icons.res file

---
 Makefile                         |  12 ++++++++
 applications/icons/.gitignore    |   1 +
 applications/icons/cfg_icon.png  | Bin 0 -> 4831 bytes
 applications/icons/dsk_icon.png  | Bin 0 -> 4464 bytes
 applications/icons/fxf_icon.png  | Bin 0 -> 4829 bytes
 applications/icons/icons.res.asm |  16 +++++++++++
 fox32os.def                      |   3 ++
 kernel/main.asm                  |   5 ++++
 kernel/res.asm                   |  48 +++++++++++++++++++++++++++++++
 9 files changed, 85 insertions(+)
 create mode 100644 applications/icons/.gitignore
 create mode 100644 applications/icons/cfg_icon.png
 create mode 100644 applications/icons/dsk_icon.png
 create mode 100644 applications/icons/fxf_icon.png
 create mode 100644 applications/icons/icons.res.asm
 create mode 100644 kernel/res.asm

diff --git a/Makefile b/Makefile
index 7764c41..3e564c2 100644
--- a/Makefile
+++ b/Makefile
@@ -67,8 +67,19 @@ bootloader/bootloader.bin: bootloader/main.asm $(wildcard bootloader/*.asm)
 base_image/startup.cfg: base_image/startup.cfg.default
 	cp $< $@
 
+ICONS := \
+	applications/icons/cfg_icon.inc \
+	applications/icons/dsk_icon.inc \
+	applications/icons/fxf_icon.inc
+
+applications/icons/%.inc: applications/icons/%.png
+	$(GFX2INC) 32 32 $< $@
+base_image/icons.res: applications/icons/icons.res.asm $(ICONS)
+	$(FOX32ASM) $< $@
+
 FILES = \
 	base_image/startup.cfg \
+	base_image/icons.res \
 	base_image/kernel.fxf \
 	base_image/sh.fxf \
 	base_image/barclock.fxf \
@@ -83,6 +94,7 @@ FILES = \
 
 ROM_FILES = \
 	base_image/startup.cfg \
+	base_image/icons.res \
 	base_image/kernel.fxf \
 	base_image/sh.fxf \
 	base_image/barclock.fxf \
diff --git a/applications/icons/.gitignore b/applications/icons/.gitignore
new file mode 100644
index 0000000..2a06e93
--- /dev/null
+++ b/applications/icons/.gitignore
@@ -0,0 +1 @@
+*.inc
diff --git a/applications/icons/cfg_icon.png b/applications/icons/cfg_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..5831a0bf28cc546197c1f3719afa659b838e1527
GIT binary patch
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diff --git a/applications/icons/dsk_icon.png b/applications/icons/dsk_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..7c3bee062cab340f8ded323282ff53567b308922
GIT binary patch
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HcmV?d00001

diff --git a/applications/icons/fxf_icon.png b/applications/icons/fxf_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..918a70cdc86de21cb9d5333bb491931f06f90172
GIT binary patch
literal 4829
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literal 0
HcmV?d00001

diff --git a/applications/icons/icons.res.asm b/applications/icons/icons.res.asm
new file mode 100644
index 0000000..74f9a3f
--- /dev/null
+++ b/applications/icons/icons.res.asm
@@ -0,0 +1,16 @@
+const ICON_SIZE: 4096
+
+    ; format: "RES" magic bytes, version, number of resource IDs
+    data.str "RES" data.8 0 data.8 3
+
+    ; format: 3 character null-terminated ID, pointer to data, size
+    data.strz "cfg" data.32 cfg_icon data.32 ICON_SIZE
+    data.strz "dsk" data.32 dsk_icon data.32 ICON_SIZE
+    data.strz "fxf" data.32 fxf_icon data.32 ICON_SIZE
+
+cfg_icon:
+    #include "cfg_icon.inc"
+dsk_icon:
+    #include "dsk_icon.inc"
+fxf_icon:
+    #include "fxf_icon.inc"
diff --git a/fox32os.def b/fox32os.def
index 28828a0..6cd68da 100644
--- a/fox32os.def
+++ b/fox32os.def
@@ -52,6 +52,9 @@ get_size:                  jmp [0x00000D24]
 draw_widgets_to_window:    jmp [0x00000E10]
 handle_widget_click:       jmp [0x00000E14]
 
+; resource jump table
+get_resource:              jmp [0x00000F10]
+
 ; event types
 const EVENT_TYPE_BUTTON_CLICK: 0x80000000
 
diff --git a/kernel/main.asm b/kernel/main.asm
index 7aa2dd0..927deea 100644
--- a/kernel/main.asm
+++ b/kernel/main.asm
@@ -77,6 +77,10 @@ jump_table:
     org.pad 0x00000610
     data.32 draw_widgets_to_window
     data.32 handle_widget_click
+
+    ; resource jump table
+    org.pad 0x00000710
+    data.32 get_resource
 jump_table_end:
 
     ; initialization code
@@ -374,6 +378,7 @@ get_os_api_version:
 
     #include "allocator.asm"
     #include "fxf/fxf.asm"
+    #include "res.asm"
     #include "task.asm"
     #include "vfs/vfs.asm"
     #include "widget/widget.asm"
diff --git a/kernel/res.asm b/kernel/res.asm
new file mode 100644
index 0000000..bc370e4
--- /dev/null
+++ b/kernel/res.asm
@@ -0,0 +1,48 @@
+; RES resource routines
+
+; extract resource data from a RES binary loaded in memory
+; inputs:
+; r0: pointer to memory buffer containing a RES binary
+; r1: pointer to 3 character null-terminated resource ID string
+; r2: size of resource data to be extracted
+; outputs:
+; r0: pointer to newly-allocated memory buffer containing the requested resource data
+;     this buffer must be freed by the caller!
+;     returns zero if resource ID not found, not enough memory, or invalid magic bytes
+get_resource:
+    cmp [r0], [res_magic]
+    ifnz mov r0, 0
+    ifnz ret
+
+    push r3
+    push r31
+
+    mov r3, r0
+    movz.8 r31, [r0+4]
+    add r0, 5
+get_resource_find_loop:
+    cmp [r0], [r1]
+    ifz jmp get_resource_found
+    add r0, 12
+    loop get_resource_find_loop
+    mov r0, 0
+    jmp get_resource_end
+get_resource_found:
+    cmp r2, [r0+8]
+    ifgt mov r2, [r0+8]
+    mov r31, [r0+4]
+    add r31, r3
+    mov r0, r2
+    call allocate_memory
+    cmp r0, 0
+    ifz jmp get_resource_end
+    mov r1, r0
+    mov r0, r31
+    call copy_memory_bytes
+    mov r0, r1
+get_resource_end:
+    pop r31
+    pop r3
+    ret
+
+res_magic: data.strz "RES"