40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
// GFX 存在的意义是什么？
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// 每一次想要draw pixel，都需要传入GOP的各种参数，
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// 加入 GFX 后，GOP 的context就是全局的，可以直接用
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// 而不用显示传递参数到draw的函数里
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#include <graphics/context.h>
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gfx_context g_gfx;
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draw_target g_draw_target;
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void gfx_init(EFI_GRAPHICS_OUTPUT_PROTOCOL *GOP) {
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g_gfx.GOP = GOP;
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g_gfx.hr = GOP->Mode->Info->HorizontalResolution;
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g_gfx.vr = GOP->Mode->Info->VerticalResolution;
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g_gfx.base = (EFI_GRAPHICS_OUTPUT_BLT_PIXEL *) GOP->Mode->FrameBufferBase;
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g_draw_target.buf = g_gfx.base;
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g_draw_target.w = g_gfx.hr;
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g_draw_target.h = g_gfx.vr;
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}
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void gfx_clear(void) {
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EFI_GRAPHICS_OUTPUT_BLT_PIXEL black = {0, 0, 0, 0};
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uefi_call_wrapper(g_gfx.GOP->Blt, 10,
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g_gfx.GOP, &black, EfiBltVideoFill,
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(UINTN)0, (UINTN)0, (UINTN)0, (UINTN)0,
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(UINTN)g_gfx.hr, (UINTN)g_gfx.vr, (UINTN)0);
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}
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void draw_set_target(EFI_GRAPHICS_OUTPUT_BLT_PIXEL *buf, SUINT32 w, SUINT32 h) {
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g_draw_target.buf = buf;
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g_draw_target.w = w;
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g_draw_target.h = h;
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}
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void draw_set_default_target(void) {
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g_draw_target.buf = g_gfx.base;
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g_draw_target.w = g_gfx.hr;
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g_draw_target.h = g_gfx.vr;
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} |