Handout

kernel/graphics/printer.cc

@@ -0,0 +1,40 @@
+#include "printer.h"
+
+#include "../debug/output.h"
+#include "../utils/size.h"
+
+// Predefined video modes (should suit the most common ones)
+static GraphicsPrinter<32, 16, 8, 0, 8, 8, 8> default_32bit;
+static GraphicsPrinter<24, 16, 8, 0, 8, 8, 8> default_24bit;
+static GraphicsPrinter<16, 11, 5, 0, 5, 6, 5> default_16bit;
+static GraphicsPrinter<15, 10, 5, 0, 5, 5, 5> default_15bit;
+static GraphicsPrinter<8, 5, 2, 0, 3, 3, 2> default_8bit;
+
+AbstractGraphicsPrinter* supportedGraphicModes[] = {
+	&default_32bit, &default_24bit, &default_16bit,
+	&default_15bit, &default_8bit,
+};
+
+AbstractGraphicsPrinter* AbstractGraphicsPrinter::getMode(
+	uint8_t colordepth, uint8_t offset_red, uint8_t offset_green,
+	uint8_t offset_blue, uint8_t bits_red, uint8_t bits_green,
+	uint8_t bits_blue) {
+	for (unsigned m = 0; m < ::size(supportedGraphicModes); m++) {
+		if (supportedGraphicModes[m]->checkMode(
+				colordepth, offset_red, offset_green, offset_blue, bits_red,
+				bits_green, bits_blue)) {
+			return supportedGraphicModes[m];
+		}
+	}
+	// Show error message (DBG should be copied to serial as well for
+	// debugging!)
+	DBG_VERBOSE << "No GraphicsPrinter<" << static_cast<int>(colordepth) << ", "
+				<< static_cast<int>(offset_red) << ", "
+				<< static_cast<int>(offset_green) << ", "
+				<< static_cast<int>(offset_blue) << ", "
+				<< static_cast<int>(bits_red) << ", "
+				<< static_cast<int>(bits_green) << ", "
+				<< static_cast<int>(bits_blue)
+				<< "> instance available - please add!" << endl;
+	return nullptr;
+}