Adds simple video driver.

prototypes-rework/include/driver/video.hpp

@@ -0,0 +1,56 @@
+#pragma once
+#include <stdint.h>
+
+#include <vbe.hpp>
+
+#include "picture.hpp"
+
+class VideoScreen : 
+	public Picture
+{
+private:
+	static Pixel outOfScreen;
+private:
+	Pixel *mFramebuffer;
+	uint32_t mPitch;
+public:	
+	const uint32_t mWidth, mHeight;
+public:
+	VideoScreen(vbe::ModeInfo const & modeInfo);
+	
+	uint32_t width() const override {
+		return this->mWidth;
+	}
+	
+	uint32_t height() const override {
+		return this->mHeight;
+	}
+	
+	Pixel & operator() (uint32_t x, uint32_t y) override {
+		if(x >= this->mWidth || y >= this->mHeight) {
+			return VideoScreen::outOfScreen;
+		} else {
+			return this->scanline(y)[x];
+		}
+	}
+	
+	Pixel const & operator() (uint32_t x, uint32_t y) const override {
+		if(x >= this->mWidth || y >= this->mHeight) {
+			return VideoScreen::outOfScreen;
+		} else {
+			return this->scanline(y)[x];
+		}
+	}
+	
+private:
+	Pixel * scanline(uint32_t y) {
+		return reinterpret_cast<Pixel*>(
+			reinterpret_cast<uint32_t>(this->mFramebuffer) + y * this->mPitch
+		);
+	}
+	Pixel const * scanline(uint32_t y) const {
+		return reinterpret_cast<Pixel*>(
+			reinterpret_cast<uint32_t>(this->mFramebuffer) + y * this->mPitch
+		);
+	}
+};

prototypes-rework/include/multiboot.hpp

@@ -19,6 +19,8 @@
 
 #define MB_ASSERT_SIZE(type, len) static_assert(sizeof(type) == len, "multiboot::" #type " must be " #len " bytes large.")
 
+#include "vbe.hpp"
+
 namespace multiboot
 {
   template<typename T>
@@ -156,7 +158,7 @@ namespace multiboot
       const APMTable * apmTable;
       struct {
         uint32_t controlInfo;
-        uint32_t modeInfo;
+        vbe::ModeInfo const * modeInfo;
         uint16_t mode;
         uint16_t interfaceSegment;
         uint16_t interfaceOffset;

prototypes-rework/include/picture.hpp

@@ -0,0 +1,25 @@
+#pragma once
+#include <stdint.h>
+
+struct Pixel
+{
+	uint8_t b;
+	uint8_t g;
+	uint8_t r;
+	uint8_t a;
+} __attribute__((packed));
+
+static inline Pixel COLOR(uint8_t r, uint8_t g, uint8_t b)
+{
+	return Pixel { b, g, r, 0xFF };
+}
+
+class Picture
+{
+public:
+	virtual uint32_t width() const = 0;
+	virtual uint32_t height() const = 0;
+
+	virtual Pixel & operator() (uint32_t x, uint32_t y) = 0;
+	virtual Pixel const & operator() (uint32_t x, uint32_t y) const = 0;
+};

prototypes-rework/include/vbe.hpp

@@ -0,0 +1,39 @@
+#pragma once
+
+#include <stddef.h>
+
+#define VBE_FAR(name) uint32_t name;
+
+namespace vbe
+{
+	struct ModeInfo
+	{
+		uint16_t attributes;
+		uint8_t winA,winB;
+		uint16_t granularity;
+		uint16_t winsize;
+		uint16_t segmentA, segmentB;
+		VBE_FAR(realFctPtr);
+		uint16_t pitch; // bytes per scanline
+
+		struct {
+			uint16_t x;
+			uint16_t y;
+		} __attribute__ ((packed)) res;
+		uint8_t Wchar, Ychar;
+		uint8_t planes, bpp, banks;
+		uint8_t memoryModel, bankSize, imagePages;
+		uint8_t reserved0;
+
+		uint8_t redMask, redPosition;
+		uint8_t greenMask, greenPosition;
+		uint8_t blueMask, bluePosition;
+		uint8_t rsvMask, rsvPosition;
+		uint8_t directcolor_attributes;
+
+		uint32_t framebuffer;
+		uint32_t reserved1;
+		uint16_t reserved2;
+	} __attribute__((packed));
+	
+}

prototypes-rework/libvideo/Makefile

@@ -0,0 +1,12 @@
+##
+# Build video library.
+##
+
+include ../config.mk
+
+LIBRARY = libvideo.a
+
+all: builddir $(LIBRARY)
+
+include ../common.mk
+include ../library.mk

prototypes-rework/libvideo/src/video.cpp

@@ -0,0 +1,12 @@
+#include <driver/video.hpp>
+
+Pixel VideoScreen::outOfScreen;
+
+VideoScreen::VideoScreen(vbe::ModeInfo const & modeInfo) : 
+	mFramebuffer((Pixel*)modeInfo.framebuffer),
+	mPitch(modeInfo.pitch),
+	mWidth(modeInfo.res.x),
+	mHeight(modeInfo.res.y)
+{
+
+}

prototypes-rework/video/Makefile

@@ -5,7 +5,7 @@
 include ../config.mk
 
 KERNEL = video.ker
-LIBS   = -lboot
+LIBS   = -lboot -lvideo
 
 all: builddir $(KERNEL)
 

prototypes-rework/video/src/init.cpp

@@ -3,13 +3,7 @@
 #include <multiboot.hpp>
 #include <io.hpp>
 
-struct dummy;
+#include <driver/video.hpp>
-
-// Symbols generated by linker, no useful content in there...
-extern dummy kernelStartMarker;
-extern dummy kernelEndMarker;
-
-uint16_t * video = (uint16_t*)0xB8000;
 
 // Prüft, ob man bereits schreiben kann
 static uint8_t is_transmit_empty(uint16_t base) {
@@ -22,67 +16,18 @@ static void write_com(uint16_t base, uint8_t chr) {
 	outb(base,chr);
 }
 
-#define VBE_FAR(name) uint32_t name;
-
-struct ModeInfoBlock {
-  uint16_t attributes;
-  uint8_t winA,winB;
-  uint16_t granularity;
-  uint16_t winsize;
-  uint16_t segmentA, segmentB;
-  VBE_FAR(realFctPtr);
-  uint16_t pitch; // bytes per scanline
- 
-  uint16_t Xres, Yres;
-  uint8_t Wchar, Ychar, planes, bpp, banks;
-  uint8_t memory_model, bank_size, image_pages;
-  uint8_t reserved0;
- 
-  uint8_t red_mask, red_position;
-  uint8_t green_mask, green_position;
-  uint8_t blue_mask, blue_position;
-  uint8_t rsv_mask, rsv_position;
-  uint8_t directcolor_attributes;
- 
-  uint32_t physbase;  // your LFB (Linear Framebuffer) address ;)
-  uint32_t reserved1;
-  uint16_t reserved2;
-} __attribute__((packed));
-
-static ModeInfoBlock mib;
-
-static void setpixel(int x, int y, uint32_t color)
-{
-	uint8_t *fb = (uint8_t*)mib.physbase;
-
-	fb[mib.pitch * y + 4 * x + 2] = (color >>  0) & 0xFF;
-	fb[mib.pitch * y + 4 * x + 1] = (color >>  8) & 0xFF;
-	fb[mib.pitch * y + 4 * x + 0] = (color >> 16) & 0xFF;
-}
-
 extern "C" void init(multiboot::Structure const & data)
 {
 	write_com(0x3F8, 'H');
 	write_com(0x3F8, 'i');
 	write_com(0x3F8, '\n');
 	
-	const char *msg = "You should not see this.";
+	VideoScreen video(*data.vbe.modeInfo);
-	while(*msg)
+	for(uint32_t y = 0; y < video.height(); y++)
 	{
-		*(video++) = *msg++ | 0x0700;
+		for(uint32_t x = 0; x < video.width(); x++)
-	}
-	
-	mib = *(ModeInfoBlock*)data.vbe.modeInfo;
-	
-	for(int y = 0; y < mib.Yres; y++)
-	{
-		for(int x = 0; x < mib.Xres; x++)
 		{
-			uint32_t r = x % 256;
+			video(x,y) = COLOR(255, 0, 0);
-			uint32_t g = y % 256;
-			uint32_t b = 0x00;
-			
-			setpixel(x, y, r | (g << 8) | (b << 16));
 		}
 	}